Adobe® Flex® 4 Language Reference
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mx.controls.listClasses 
ListBase 
Packagemx.controls.listClasses
Classpublic class ListBase
InheritanceListBase Inheritance ScrollControlBase Inheritance UIComponent Inheritance FlexSprite Inheritance Sprite Inheritance DisplayObjectContainer Inheritance InteractiveObject Inheritance DisplayObject Inheritance EventDispatcher Inheritance Object
Implements IDataRenderer, IFocusManagerComponent, IListItemRenderer, IDropInListItemRenderer, IEffectTargetHost
Subclasses DataGridBase, List, TileBase

Language Version: ActionScript 3.0
Product Version: Flex 3
Runtime Versions: Flash Player 9, AIR 1.1

The ListBase class is the base class for controls that represent lists of items that can have one or more selected and can scroll through the items. Items are supplied using the dataProvider property and displayed via item renderers.

In a model/view architecture, the ListBase-derived class represents the view, and the dataProvider object represents the model.

MXML SyntaxexpandedHide MXML Syntax

The ListBase class inherits all of the tag properties of its superclasses, and adds the following tag properties:

  <mx:tagname
    Properties
    allowDragSelection="false|true"
    allowMultipleSelection="false|true"
    columnCount="4"
    columnWidth="NaN"
    dataProvider="null"
    dataTipField="label"
    dataTipFunction="null"
    dragEnabled="false|true"
    dragMoveEnabled="false|true"
    dropEnabled="false|true"
    iconField="null"
    iconFunction="null"
    itemRenderer="null"
    labelField="label"
    labelFunction="null"
    menuSelectionMode="false|true"
    offscreenExtraRowsOrColumns="0"
    rowCount="-1"
    rowHeight="NaN"
    selectable="true|false"
    selectedIndex="-1"
    selectedIndices="null"
    selectedItem="null"
    selectedItems="null"
    showDataTips="false|true"
    variableRowHeight="false|true"
    wordWrap="false|true"
 
    Styles
    alternatingItemColors="undefined"
    itemsChangeEffect="undefined"
    dropIndicatorSkin="ListDropIndicator"
    focusAlpha="0.5"
    focusRoundedCorners="tl tr bl br"
    paddingBottom="2"
    paddingLeft="2"
    paddingRight="0"
    paddingTop="2"
    rollOverColor="0xEEFEE6"
    selectionColor="0x7FCEFF"
    selectionDisabledColor="0xDDDDDD"
    selectionDuration="250"
    selectionEasingFunction="undefined"
    textRollOverColor="0x2B333C"
    textSelectedColor="0x2B333C"
    useRollOver="true|false"
    verticalAlign="top|middle|bottom"
 
    Events
    change="No default"
    dataChange="No default"
    itemClick="No default"
    itemDoubleClick="No default"
    itemRollOut="No default"
    itemRollOver="No default"
   />
  

See also



Public Properties
 PropertyDefined By
 InheritedaccessibilityDescription : String
A convenience accessor for the description property in this UIComponent's accessibilityProperties object.
UIComponent
 InheritedaccessibilityEnabled : Boolean
A convenience accessor for the silent property in this UIComponent's accessibilityProperties object.
UIComponent
 InheritedaccessibilityImplementation : AccessibilityImplementation
The current accessibility implementation (AccessibilityImplementation) for this InteractiveObject instance.
InteractiveObject
 InheritedaccessibilityName : String
A convenience accessor for the name property in this UIComponent's accessibilityProperties object.
UIComponent
 InheritedaccessibilityProperties : AccessibilityProperties
The current accessibility options for this display object.
DisplayObject
 InheritedaccessibilityShortcut : String
A convenience accessor for the shortcut property in this UIComponent's accessibilityProperties object.
UIComponent
 InheritedactiveEffects : Array
[read-only] The list of effects that are currently playing on the component, as an Array of EffectInstance instances.
UIComponent
  allowDragSelection : Boolean = false
A flag that indicates whether drag-selection is enabled.
ListBase
  allowMultipleSelection : Boolean
A flag that indicates whether you can allow more than one item to be selected at the same time.
ListBase
 Inheritedalpha : Number
Indicates the alpha transparency value of the object specified.
DisplayObject
 InheritedautomationDelegate : Object
The delegate object that handles the automation-related functionality.
UIComponent
 InheritedautomationEnabled : Boolean
[read-only] True if this component is enabled for automation, false otherwise.
UIComponent
 InheritedautomationName : String
Name that can be used as an identifier for this object.
UIComponent
 InheritedautomationOwner : DisplayObjectContainer
[read-only] The owner of this component for automation purposes.
UIComponent
 InheritedautomationParent : DisplayObjectContainer
[read-only] The parent of this component for automation purposes.
UIComponent
 InheritedautomationTabularData : Object
[read-only] An implementation of the IAutomationTabularData interface, which can be used to retrieve the data.
UIComponent
 InheritedautomationValue : Array
[read-only] This value generally corresponds to the rendered appearance of the object and should be usable for correlating the identifier with the object as it appears visually within the application.
UIComponent
 InheritedautomationVisible : Boolean
[read-only] True if this component is visible for automation, false otherwise.
UIComponent
 Inheritedbaseline : Object
The vertical distance in pixels from the anchor target to the control's baseline position.
UIComponent
 InheritedbaselinePosition : Number
[read-only] The y-coordinate of the baseline of the first line of text of the component.
UIComponent
 InheritedblendMode : String
A value from the BlendMode class that specifies which blend mode to use.
DisplayObject
 InheritedblendShader : Shader
[write-only] Sets a shader that is used for blending the foreground and background.
DisplayObject
 InheritedborderMetrics : EdgeMetrics
[read-only] Returns an EdgeMetrics object that has four properties: left, top, right, and bottom.
ScrollControlBase
 Inheritedbottom : Object
The vertical distance in pixels from the bottom edge of the component to the anchor target's bottom edge.
UIComponent
 InheritedbuttonMode : Boolean
Specifies the button mode of this sprite.
Sprite
 InheritedcacheAsBitmap : Boolean
If set to true, Flash runtimes cache an internal bitmap representation of the display object.
DisplayObject
 InheritedAIR-only cacheAsBitmapMatrix : Matrix
If non-null, this Matrix object defines how a display object is rendered when cacheAsBitmap is set to true.
DisplayObject
 InheritedcacheHeuristic : Boolean
[write-only] Used by Flex to suggest bitmap caching for the object.
UIComponent
 InheritedcachePolicy : String
Specifies the bitmap caching policy for this object.
UIComponent
 InheritedclassName : String
[read-only] The name of this instance's class, such as "Button".
UIComponent
  columnCount : int
The number of columns to be displayed in a TileList control or items in a HorizontalList control.
ListBase
  columnWidth : Number
The width of the control's columns.
ListBase
 Inheritedconstructor : Object
A reference to the class object or constructor function for a given object instance.
Object
 InheritedcontentMouseX : Number
[read-only] Returns the x position of the mouse, in the content coordinate system.
UIComponent
 InheritedcontentMouseY : Number
[read-only] Returns the y position of the mouse, in the content coordinate system.
UIComponent
 InheritedcontextMenu : NativeMenu
Specifies the context menu associated with this object.
InteractiveObject
 InheritedcurrentState : String
The current view state of the component.
UIComponent
 InheritedcursorManager : ICursorManager
[read-only] Gets the CursorManager that controls the cursor for this component and its peers.
UIComponent
  data : Object
The item in the data provider this component should render when this component is used as an item renderer or item editor.
ListBase
  dataProvider : Object
Set of data to be viewed.
ListBase
  dataTipField : String
Name of the field in the data provider items to display as the data tip.
ListBase
  dataTipFunction : Function
User-supplied function to run on each item to determine its dataTip.
ListBase
 Inheriteddepth : Number
Determines the order in which items inside of containers are rendered.
UIComponent
 Inheriteddescriptor : UIComponentDescriptor
Reference to the UIComponentDescriptor, if any, that was used by the createComponentFromDescriptor() method to create this UIComponent instance.
UIComponent
 InheriteddesignLayer : DesignLayer
Specifies the optional DesignLayer instance associated with this visual element.
UIComponent
 Inheriteddocument : Object
A reference to the document object associated with this UIComponent.
UIComponent
 InheriteddoubleClickEnabled : Boolean
[override] Specifies whether the UIComponent object receives doubleClick events.
UIComponent
  dragEnabled : Boolean
A flag that indicates whether you can drag items out of this control and drop them on other controls.
ListBase
  dragMoveEnabled : Boolean
A flag that indicates whether items can be moved instead of just copied from the control as part of a drag-and-drop operation.
ListBase
  dropEnabled : Boolean
A flag that indicates whether dragged items can be dropped onto the control.
ListBase
 InheriteddropTarget : DisplayObject
[read-only] Specifies the display object over which the sprite is being dragged, or on which the sprite was dropped.
Sprite
 Inheritedenabled : Boolean
Whether the component can accept user interaction.
UIComponent
 InheritederrorString : String
The text that displayed by a component's error tip when a component is monitored by a Validator and validation fails.
UIComponent
 InheritedexplicitHeight : Number
Number that specifies the explicit height of the component, in pixels, in the component's coordinates.
UIComponent
 InheritedexplicitMaxHeight : Number
The maximum recommended height of the component to be considered by the parent during layout.
UIComponent
 InheritedexplicitMaxWidth : Number
The maximum recommended width of the component to be considered by the parent during layout.
UIComponent
 InheritedexplicitMinHeight : Number
The minimum recommended height of the component to be considered by the parent during layout.
UIComponent
 InheritedexplicitMinWidth : Number
The minimum recommended width of the component to be considered by the parent during layout.
UIComponent
 InheritedexplicitWidth : Number
Number that specifies the explicit width of the component, in pixels, in the component's coordinates.
UIComponent
 Inheritedfilters : Array
An indexed array that contains each filter object currently associated with the display object.
DisplayObject
 InheritedflexContextMenu : IFlexContextMenu
The context menu for this UIComponent.
UIComponent
 InheritedfocusEnabled : Boolean
Indicates whether the component can receive focus when tabbed to.
UIComponent
 InheritedfocusManager : IFocusManager
Gets the FocusManager that controls focus for this component and its peers.
UIComponent
 InheritedfocusPane : Sprite
The focus pane associated with this object.
UIComponent
 InheritedfocusRect : Object
Specifies whether this object displays a focus rectangle.
InteractiveObject
 Inheritedgraphics : Graphics
[read-only] Specifies the Graphics object that belongs to this sprite where vector drawing commands can occur.
Sprite
 InheritedhasFocusableChildren : Boolean
A flag that indicates whether child objects can receive focus.
UIComponent
 InheritedhasLayoutMatrix3D : Boolean
[read-only] Contians true if the element has 3D Matrix.
UIComponent
 Inheritedheight : Number
[override] Number that specifies the height of the component, in pixels, in the parent's coordinates.
UIComponent
 InheritedhitArea : Sprite
Designates another sprite to serve as the hit area for a sprite.
Sprite
 InheritedhorizontalCenter : Object
The horizontal distance in pixels from the center of the component to the center of the anchor target's content area.
UIComponent
 InheritedhorizontalScrollPolicy : String
A property that indicates whether the horizontal scroll bar is always on, always off, or automatically changes based on the parameters passed to the setScrollBarProperties() method.
ScrollControlBase
 InheritedhorizontalScrollPosition : Number
The offset into the content from the left edge.
ScrollControlBase
  iconField : String
The name of the field in the data provider object that determines what to display as the icon.
ListBase
  iconFunction : Function
A user-supplied function to run on each item to determine its icon.
ListBase
 Inheritedid : String
ID of the component.
UIComponent
 InheritedincludeInLayout : Boolean
Specifies whether this component is included in the layout of the parent container.
UIComponent
 InheritedinheritingStyles : Object
The beginning of this component's chain of inheriting styles.
UIComponent
 Inheritedinitialized : Boolean
A flag that determines if an object has been through all three phases of layout: commitment, measurement, and layout (provided that any were required).
UIComponent
 InheritedinstanceIndex : int
[read-only] The index of a repeated component.
UIComponent
 InheritedinstanceIndices : Array
An Array containing the indices required to reference this UIComponent object from its parent document.
UIComponent
 Inheritedis3D : Boolean
[read-only] Contains true when the element is in 3D.
UIComponent
 InheritedisDocument : Boolean
[read-only] Contains true if this UIComponent instance is a document object.
UIComponent
 InheritedisPopUp : Boolean
Set to true by the PopUpManager to indicate that component has been popped up.
UIComponent
  itemRenderer : IFactory
The custom item renderer for the control.
ListBase
  labelField : String
The name of the field in the data provider items to display as the label.
ListBase
  labelFunction : Function
A user-supplied function to run on each item to determine its label.
ListBase
 InheritedlayoutMatrix3D : Matrix3D
[write-only] The transform matrix that is used to calculate a component's layout relative to its siblings.
UIComponent
 Inheritedleft : Object
The horizontal distance in pixels from the left edge of the component to the anchor target's left edge.
UIComponent
  listData : BaseListData
When a component is used as a drop-in item renderer or drop-in item editor, Flex initializes the listData property of the component with the additional data from the list control.
ListBase
 InheritedliveScrolling : Boolean = true
A flag that indicates whether scrolling is live as the scrollbar thumb is moved or the view is not updated until the thumb is released.
ScrollControlBase
 InheritedloaderInfo : LoaderInfo
[read-only] Returns a LoaderInfo object containing information about loading the file to which this display object belongs.
DisplayObject
 InheritedmaintainProjectionCenter : Boolean
When true, the component keeps its projection matrix centered on the middle of its bounding box.
UIComponent
 Inheritedmask : DisplayObject
The calling display object is masked by the specified mask object.
DisplayObject
 InheritedmaxHeight : Number
The maximum recommended height of the component to be considered by the parent during layout.
UIComponent
 InheritedmaxHorizontalScrollPosition : Number
The maximum value for the horizontalScrollPosition property.
ScrollControlBase
 InheritedmaxVerticalScrollPosition : Number
The maximum value for the verticalScrollPosition property.
ScrollControlBase
 InheritedmaxWidth : Number
The maximum recommended width of the component to be considered by the parent during layout.
UIComponent
 InheritedmeasuredHeight : Number
The default height of the component, in pixels.
UIComponent
 InheritedmeasuredMinHeight : Number
The default minimum height of the component, in pixels.
UIComponent
 InheritedmeasuredMinWidth : Number
The default minimum width of the component, in pixels.
UIComponent
 InheritedmeasuredWidth : Number
The default width of the component, in pixels.
UIComponent
  menuSelectionMode : Boolean = false
A flag that indicates whether menu-style selection should be used.
ListBase
 InheritedminHeight : Number
The minimum recommended height of the component to be considered by the parent during layout.
UIComponent
 InheritedminWidth : Number
The minimum recommended width of the component to be considered by the parent during layout.
UIComponent
 InheritedmoduleFactory : IFlexModuleFactory
A module factory is used as context for using embedded fonts and for finding the style manager that controls the styles for this component.
UIComponent
 InheritedmouseChildren : Boolean
Determines whether or not the children of the object are mouse, or user input device, enabled.
DisplayObjectContainer
 InheritedmouseEnabled : Boolean
Specifies whether this object receives mouse, or other user input, messages.
InteractiveObject
 InheritedmouseFocusEnabled : Boolean
Whether you can receive focus when clicked on.
UIComponent
 InheritedmouseX : Number
[read-only] Indicates the x coordinate of the mouse or user input device position, in pixels.
DisplayObject
 InheritedmouseY : Number
[read-only] Indicates the y coordinate of the mouse or user input device position, in pixels.
DisplayObject
 Inheritedname : String
Indicates the instance name of the DisplayObject.
DisplayObject
 InheritednestLevel : int
Depth of this object in the containment hierarchy.
UIComponent
 InheritednonInheritingStyles : Object
The beginning of this component's chain of non-inheriting styles.
UIComponent
  nullItemRenderer : IFactory
The custom item renderer for the control.
ListBase
 InheritednumAutomationChildren : int
[read-only] The number of automation children this container has.
UIComponent
 InheritednumChildren : int
[read-only] Returns the number of children of this object.
DisplayObjectContainer
  offscreenExtraRowsOrColumns : int
The target number of extra rows or columns of item renderers to be used in the layout of the control.
ListBase
 InheritedopaqueBackground : Object
Specifies whether the display object is opaque with a certain background color.
DisplayObject
 Inheritedowner : DisplayObjectContainer
The owner of this IVisualElement object.
UIComponent
 Inheritedparent : DisplayObjectContainer
[override] [read-only] The parent container or component for this component.
UIComponent
 InheritedparentApplication : Object
[read-only] A reference to the Application object that contains this UIComponent instance.
UIComponent
 InheritedparentDocument : Object
[read-only] A reference to the parent document object for this UIComponent.
UIComponent
 InheritedpercentHeight : Number
Specifies the height of a component as a percentage of its parent's size.
UIComponent
 InheritedpercentWidth : Number
Specifies the width of a component as a percentage of its parent's size.
UIComponent
 InheritedpostLayoutTransformOffsets : mx.geom:TransformOffsets
Defines a set of adjustments that can be applied to the object's transform in a way that is invisible to its parent's layout.
UIComponent
 InheritedprocessedDescriptors : Boolean
Set to true after immediate or deferred child creation, depending on which one happens.
UIComponent
 Inheritedprototype : Object
[static] A reference to the prototype object of a class or function object.
Object
 Inheritedrepeater : IRepeater
[read-only] A reference to the Repeater object in the parent document that produced this UIComponent.
UIComponent
 InheritedrepeaterIndex : int
[read-only] The index of the item in the data provider of the Repeater that produced this UIComponent.
UIComponent
 InheritedrepeaterIndices : Array
An Array containing the indices of the items in the data provider of the Repeaters in the parent document that produced this UIComponent.
UIComponent
 Inheritedrepeaters : Array
An Array containing references to the Repeater objects in the parent document that produced this UIComponent.
UIComponent
 Inheritedright : Object
The horizontal distance in pixels from the right edge of the component to the anchor target's right edge.
UIComponent
 Inheritedroot : DisplayObject
[read-only] For a display object in a loaded SWF file, the root property is the top-most display object in the portion of the display list's tree structure represented by that SWF file.
DisplayObject
 Inheritedrotation : Number
[override] Indicates the rotation of the DisplayObject instance, in degrees, from its original orientation.
UIComponent
 InheritedrotationX : Number
[override] Indicates the x-axis rotation of the DisplayObject instance, in degrees, from its original orientation relative to the 3D parent container.
UIComponent
 InheritedrotationY : Number
[override] Indicates the y-axis rotation of the DisplayObject instance, in degrees, from its original orientation relative to the 3D parent container.
UIComponent
 InheritedrotationZ : Number
[override] Indicates the z-axis rotation of the DisplayObject instance, in degrees, from its original orientation relative to the 3D parent container.
UIComponent
  rowCount : int
Number of rows to be displayed.
ListBase
  rowHeight : Number
The height of the rows in pixels.
ListBase
 Inheritedscale9Grid : Rectangle
The current scaling grid that is in effect.
DisplayObject
 InheritedscaleX : Number
[override] Number that specifies the horizontal scaling factor.
UIComponent
 InheritedscaleY : Number
[override] Number that specifies the vertical scaling factor.
UIComponent
 InheritedscaleZ : Number
[override] Number that specifies the scaling factor along the z axis.
UIComponent
 Inheritedscreen : Rectangle
[read-only] Returns an object that contains the size and position of the base drawing surface for this object.
UIComponent
 InheritedscrollRect : Rectangle
The scroll rectangle bounds of the display object.
DisplayObject
 InheritedscrollTipFunction : Function
A function that computes the string to be displayed as the ScrollTip.
ScrollControlBase
  selectable : Boolean
A flag that indicates whether the list shows selected items as selected.
ListBase
  selectedIndex : int
The index in the data provider of the selected item.
ListBase
  selectedIndices : Array
An array of indices in the data provider of the selected items.
ListBase
  selectedItem : Object
A reference to the selected item in the data provider.
ListBase
  selectedItems : Array
An array of references to the selected items in the data provider.
ListBase
  selectedItemsCompareFunction : Function
A function used to compare items in the selectedItems property against items in the data provider.
ListBase
  showDataTips : Boolean
A flag that indicates whether dataTips are displayed for text in the rows.
ListBase
 InheritedshowInAutomationHierarchy : Boolean
A flag that determines if an automation object shows in the automation hierarchy.
UIComponent
 InheritedshowScrollTips : Boolean = false
A flag that indicates whether a tooltip should appear near the scroll thumb when it is being dragged.
ScrollControlBase
 InheritedsoundTransform : flash.media:SoundTransform
Controls sound within this sprite.
Sprite
 Inheritedstage : Stage
[read-only] The Stage of the display object.
DisplayObject
 Inheritedstates : Array
The view states that are defined for this component.
UIComponent
 InheritedstyleDeclaration : CSSStyleDeclaration
Storage for the inline inheriting styles on this object.
UIComponent
 InheritedstyleManager : IStyleManager2
[read-only] Returns the StyleManager instance used by this component.
UIComponent
 InheritedstyleName : Object
The class style used by this component.
UIComponent
 InheritedstyleParent : IAdvancedStyleClient
[read-only] A component's parent is used to evaluate descendant selectors.
UIComponent
 InheritedsystemManager : ISystemManager
Returns the SystemManager object used by this component.
UIComponent
 InheritedtabChildren : Boolean
Determines whether the children of the object are tab enabled.
DisplayObjectContainer
 InheritedtabEnabled : Boolean
Specifies whether this object is in the tab order.
InteractiveObject
 InheritedtabFocusEnabled : Boolean
A flag that indicates whether this object can receive focus via the TAB key This is similar to the tabEnabled property used by the Flash Player. This is usually true for components that handle keyboard input, but some components in controlbars have them set to false because they should not steal focus from another component like an editor.
UIComponent
 InheritedtabIndex : int
Specifies the tab ordering of objects in a SWF file.
InteractiveObject
 InheritedtextSnapshot : flash.text:TextSnapshot
[read-only] Returns a TextSnapshot object for this DisplayObjectContainer instance.
DisplayObjectContainer
 InheritedtoolTip : String
Text to display in the ToolTip.
UIComponent
 Inheritedtop : Object
The vertical distance in pixels from the top edge of the component to the anchor target's top edge.
UIComponent
 Inheritedtransform : flash.geom:Transform
An object with properties pertaining to a display object's matrix, color transform, and pixel bounds.
DisplayObject
 InheritedtransformX : Number
Sets the x coordinate for the transform center of the component.
UIComponent
 InheritedtransformY : Number
Sets the y coordinate for the transform center of the component.
UIComponent
 InheritedtransformZ : Number
Sets the z coordinate for the transform center of the component.
UIComponent
 Inheritedtransitions : Array
An Array of Transition objects, where each Transition object defines a set of effects to play when a view state change occurs.
UIComponent
 InheritedtweeningProperties : Array
Array of properties that are currently being tweened on this object.
UIComponent
 Inheriteduid : String
A unique identifier for the object.
UIComponent
 InheritedupdateCompletePendingFlag : Boolean
A flag that determines if an object has been through all three phases of layout validation (provided that any were required).
UIComponent
 InheriteduseHandCursor : Boolean
A Boolean value that indicates whether the pointing hand (hand cursor) appears when the pointer rolls over a sprite in which the buttonMode property is set to true.
Sprite
 InheritedvalidationSubField : String
Used by a validator to associate a subfield with this component.
UIComponent
  value : Object
[read-only] The selected item, or the data or label field of the selected item.
ListBase
  variableRowHeight : Boolean
A flag that indicates whether the individual rows can have different height.
ListBase
 InheritedverticalCenter : Object
The vertical distance in pixels from the center of the component to the center of the anchor target's content area.
UIComponent
 InheritedverticalScrollPolicy : String
A property that indicates whether the vertical scroll bar is always on, always off, or automatically changes based on the parameters passed to the setScrollBarProperties() method.
ScrollControlBase
 InheritedverticalScrollPosition : Number
The offset into the content from the top edge.
ScrollControlBase
 InheritedviewMetrics : EdgeMetrics
[read-only] An EdgeMetrics object taking into account the scroll bars, if visible.
ScrollControlBase
 Inheritedvisible : Boolean
[override] Whether or not the display object is visible.
UIComponent
 Inheritedwidth : Number
[override] Number that specifies the width of the component, in pixels, in the parent's coordinates.
UIComponent
  wordWrap : Boolean
A flag that indicates whether text in the row should be word wrapped.
ListBase
 Inheritedx : Number
[override] Number that specifies the component's horizontal position, in pixels, within its parent container.
UIComponent
 Inheritedy : Number
[override] Number that specifies the component's vertical position, in pixels, within its parent container.
UIComponent
 Inheritedz : Number
[override] Indicates the z coordinate position along the z-axis of the DisplayObject instance relative to the 3D parent container.
UIComponent
Protected Properties
 PropertyDefined By
  actualCollection : ICollectionView
A copy of the value normally stored in collection used while running data changes effects.
ListBase
  actualIterator : IViewCursor
A copy of the value normally stored in iterator used while running data changes effects.
ListBase
  allowItemSizeChangeNotification : Boolean
[write-only] If false, renderers cannot invalidate size of List.
ListBase
  anchorBookmark : CursorBookmark
A bookmark to the item that is the anchor.
ListBase
  anchorIndex : int = -1
The offset of the item in the data provider that is the selection anchor point.
ListBase
 Inheritedborder : IFlexDisplayObject
The border object.
ScrollControlBase
  cachedItemsChangeEffect : IEffect = null
The effect that plays when changes occur in the data provider for the control, set through the itemsChangeEffect style.
ListBase
  caretBookmark : CursorBookmark
A bookmark to the item under the caret.
ListBase
  caretIndex : int = -1
The offset of the item in the data provider that is the selection caret point.
ListBase
  caretIndicator : Sprite
The DisplayObject that contains the graphics that indicate which renderer is the caret.
ListBase
  caretItemRenderer : IListItemRenderer
The renderer for the item under the caret.
ListBase
  caretUID : String
The UID of the item under the caret.
ListBase
  collection : ICollectionView
An ICollectionView that represents the data provider.
ListBase
 InheritedcurrentCSSState : String
[read-only] The state to be used when matching CSS pseudo-selectors.
UIComponent
  dataEffectCompleted : Boolean = false
A flag that indicates that the a data change effect has just completed.
ListBase
  dataItemWrappersByRenderer : Dictionary
A dictionary mapping item renderers to the ItemWrappers used to supply their data.
ListBase
  defaultColumnCount : int = 4
The default number of columns to display.
ListBase
  defaultRowCount : int = 4
The default number of rows to display.
ListBase
  dragImage : IUIComponent
[read-only] Gets an instance of a class that displays the visuals during a drag and drop operation.
ListBase
  dragImageOffsets : Point
[read-only] Gets the offset of the drag image for drag and drop.
ListBase
  explicitColumnCount : int = -1
The column count requested by explicitly setting the columnCount property.
ListBase
  explicitColumnWidth : Number
The column width requested by explicitly setting the columnWidth.
ListBase
  explicitRowCount : int = -1
The row count requested by explicitly setting rowCount.
ListBase
  explicitRowHeight : Number
The row height requested by explicitly setting rowHeight.
ListBase
  factoryMap : Dictionary
A map of item renderers by factory.
ListBase
  freeItemRenderers : Array
A stack of unused item renderers.
ListBase
  freeItemRenderersByFactory : Dictionary
A map of free item renderers by factory.
ListBase
 InheritedhasComplexLayoutMatrix : Boolean
[read-only] Returns true if the UIComponent has any non-translation (x,y) transform properties.
UIComponent
  highlightIndicator : Sprite
The DisplayObject that contains the graphics that indicates which renderer is highlighted.
ListBase
  highlightItemRenderer : IListItemRenderer
The renderer that is currently rolled over or under the caret.
ListBase
  highlightUID : String
The UID of the item that is current rolled over or under the caret.
ListBase
 InheritedhorizontalScrollBar : ScrollBar
The horizontal scroll bar.
ScrollControlBase
  itemsNeedMeasurement : Boolean = true
A flag that indicates whether the columnWidth and rowHeight properties need to be calculated.
ListBase
  itemsSizeChanged : Boolean = false
A flag that indicates that the size of the renderers may have changed.
ListBase
  iterator : IViewCursor
The main IViewCursor used to fetch items from the data provider and pass the items to the renderers.
ListBase
  iteratorValid : Boolean = true
A flag that indicates that a page fault as occurred and that the iterator's position is not valid (not positioned at the topmost item being displayed).
ListBase
  keySelectionPending : Boolean = false
A flag that indicates if keyboard selection was interrupted by a page fault.
ListBase
  lastDropIndex : int
The most recently calculated index where the drag item should be added to the drop target.
ListBase
  lastSeekPending : ListBaseSeekPending
The most recent seek that caused a page fault.
ListBase
  listContent : ListBaseContentHolder
An internal display object that parents all of the item renderers, selection and highlighting indicators and other supporting graphics.
ListBase
  listContentStyleFilters : Object
[read-only] The set of styles to pass from the ListBase to the listContent.
ListBase
  listItems : Array
[read-only] An Array of Arrays that contains the itemRenderer instances that render each data provider item.
ListBase
 InheritedmaskShape : Shape
The mask.
ScrollControlBase
  modifiedCollectionView : ModifiedCollectionView
The collection view that temporarily preserves previous data provider state to facilitate running data change effects.
ListBase
  offscreenExtraColumns : int = 0
The target number of extra columns of item renderers used in the layout of the control.
ListBase
  offscreenExtraColumnsLeft : int = 0
The number of offscreen columns currently to the left of the leftmost visible column.
ListBase
  offscreenExtraColumnsRight : int = 0
The number of offscreen columns currently to the right of the right visible column.
ListBase
  offscreenExtraRows : int = 0
The target number of extra rows of item renderers to be used in the layout of the control.
ListBase
  offscreenExtraRowsBottom : int = 0
The number of offscreen rows currently below the bottom visible item renderer.
ListBase
  offscreenExtraRowsOrColumnsChanged : Boolean = false
A flag indicating that the number of offscreen rows or columns may have changed.
ListBase
  offscreenExtraRowsTop : int = 0
The number of offscreen rows currently above the topmost visible row.
ListBase
  rendererChanged : Boolean = false
A flag that indicates that the renderer changed.
ListBase
  reservedItemRenderers : Object
A hash map of currently unused item renderers that may be used again in the near future.
ListBase
 InheritedresourceManager : IResourceManager
[read-only] A reference to the object which manages all of the application's localized resources.
UIComponent
  rowInfo : Array
[read-only] An array of ListRowInfo objects that cache row heights and other tracking information for the rows in listItems.
ListBase
  rowMap : Object
A hash map of item renderers to their respective ListRowInfo object.
ListBase
  runDataEffectNextUpdate : Boolean = false
A flag that indicates if a data effect should be initiated the next time the display is updated.
ListBase
  runningDataEffect : Boolean = false
A flag indicating if a data change effect is currently running.
ListBase
 InheritedscrollAreaChanged : Boolean
A flag that the scrolling area changed due to the appearance or disappearance of scrollbars.
ScrollControlBase
  selectedData : Object
A hash table of ListBaseSelectionData objects that track which items are currently selected.
ListBase
  selectionIndicators : Object
A hash table of selection indicators.
ListBase
  selectionLayer : Sprite
The layer in listContent where all selection and highlight indicators are drawn.
ListBase
  selectionTweens : Object
A hash table of selection tweens.
ListBase
  showCaret : Boolean
A flag that indicates whether to show caret.
ListBase
  unconstrainedRenderers : Dictionary
A hash map of item renderers that are not subject to the layout algorithms of the list.
ListBase
 InheritedunscaledHeight : Number
[read-only] A convenience method for determining the unscaled height of the component.
UIComponent
 InheritedunscaledWidth : Number
[read-only] A convenience method for determining the unscaled width of the component All of a component's drawing and child layout should be done within a bounding rectangle of this width, which is also passed as an argument to updateDisplayList().
UIComponent
 InheritedverticalScrollBar : ScrollBar
The vertical scroll bar.
ScrollControlBase
  visibleData : Object
[read-only] A hash table of data provider item renderers currently in view.
ListBase
  wordWrapChanged : Boolean = false
A flag that indicates whether the value of the wordWrap property has changed since the last time the display list was updated.
ListBase
Public Methods
 MethodDefined By
  
Constructor.
ListBase
 Inherited
Adds a child DisplayObject instance to this DisplayObjectContainer instance.
DisplayObjectContainer
 Inherited
Adds a child DisplayObject instance to this DisplayObjectContainer instance.
DisplayObjectContainer
  
Adds an item renderer if a data change effect is running.
ListBase
 Inherited
addEventListener(type:String, listener:Function, useCapture:Boolean = false, priority:int = 0, useWeakReference:Boolean = false):void
Registers an event listener object with an EventDispatcher object so that the listener receives notification of an event.
EventDispatcher
 Inherited
Indicates whether the security restrictions would cause any display objects to be omitted from the list returned by calling the DisplayObjectContainer.getObjectsUnderPoint() method with the specified point point.
DisplayObjectContainer
  
Returns the index where the dropped items should be added to the drop target.
ListBase
 Inherited
callLater(method:Function, args:Array = null):void
Queues a function to be called later.
UIComponent
 Inherited
Deletes a style property from this component instance.
UIComponent
 Inherited
Determines whether the specified display object is a child of the DisplayObjectContainer instance or the instance itself.
DisplayObjectContainer
 Inherited
Converts a Point object from content coordinates to global coordinates.
UIComponent
 Inherited
Converts a Point object from content to local coordinates.
UIComponent
 Inherited
Returns a set of properties that identify the child within this container.
UIComponent
 Inherited
Returns a set of properties that identify the child within this container.
UIComponent
  
Creates an item renderer given the data object.
ListBase
 Inherited
Creates an id reference to this IUIComponent object on its parent document object.
UIComponent
 Inherited
Deletes the id reference to this IUIComponent object on its parent document object.
UIComponent
 Inherited
Returns a UITextFormat object corresponding to the text styles for this UIComponent.
UIComponent
 Inherited
[override] Dispatches an event into the event flow.
UIComponent
 Inherited
Shows or hides the focus indicator around this component.
UIComponent
 Inherited
drawRoundRect(x:Number, y:Number, w:Number, h:Number, r:Object = null, c:Object = null, alpha:Object = null, rot:Object = null, gradient:String = null, ratios:Array = null, hole:Object = null):void
Programmatically draws a rectangle into this skin's Graphics object.
UIComponent
 Inherited
Called by the effect instance when it stops playing on the component.
UIComponent
 Inherited
Called by the effect instance when it starts playing on the component.
UIComponent
 Inherited
Ends all currently playing effects on the component.
UIComponent
 Inherited
executeBindings(recurse:Boolean = false):void
Executes all the bindings for which the UIComponent object is the destination.
UIComponent
  
Finds an item in the list based on a String, and moves the selection to it.
ListBase
 Inherited
Called after printing is complete.
UIComponent
 Inherited
Provides the automation object at the specified index.
UIComponent
 Inherited
Provides the automation object list .
UIComponent
 Inherited
getBounds(targetCoordinateSpace:DisplayObject):Rectangle
Returns a rectangle that defines the area of the display object relative to the coordinate system of the targetCoordinateSpace object.
DisplayObject
 Inherited
getBoundsXAtSize(width:Number, height:Number, postLayoutTransform:Boolean = true):Number
Returns the x coordinate of the element's bounds at the specified element size.
UIComponent
 Inherited
getBoundsYAtSize(width:Number, height:Number, postLayoutTransform:Boolean = true):Number
Returns the y coordinate of the element's bounds at the specified element size.
UIComponent
 Inherited
Returns the child display object instance that exists at the specified index.
DisplayObjectContainer
 Inherited
Returns the child display object that exists with the specified name.
DisplayObjectContainer
 Inherited
Returns the index position of a child DisplayObject instance.
DisplayObjectContainer
 Inherited
Finds the type selectors for this UIComponent instance.
UIComponent
 Inherited
getConstraintValue(constraintName:String):*
Returns a layout constraint value, which is the same as getting the constraint style for this component.
UIComponent
 Inherited
A convenience method for determining whether to use the explicit or measured height
UIComponent
 Inherited
A convenience method for determining whether to use the explicit or measured width
UIComponent
 Inherited
Gets the object that currently has focus.
UIComponent
  
Return the appropriate factory, using the default factory if none specified.
ListBase
 Inherited
getLayoutBoundsHeight(postLayoutTransform:Boolean = true):Number
Returns the element's layout height.
UIComponent
 Inherited
getLayoutBoundsWidth(postLayoutTransform:Boolean = true):Number
Returns the element's layout width.
UIComponent
 Inherited
getLayoutBoundsX(postLayoutTransform:Boolean = true):Number
Returns the x coordinate that the element uses to draw on screen.
UIComponent
 Inherited
getLayoutBoundsY(postLayoutTransform:Boolean = true):Number
Returns the y coordinate that the element uses to draw on screen.
UIComponent
 Inherited
Returns the transform matrix that is used to calculate the component's layout relative to its siblings.
UIComponent
 Inherited
Returns the layout transform Matrix3D for this element.
UIComponent
 Inherited
getMaxBoundsHeight(postLayoutTransform:Boolean = true):Number
Returns the element's maximum height.
UIComponent
 Inherited
getMaxBoundsWidth(postLayoutTransform:Boolean = true):Number
Returns the element's maximum width.
UIComponent
 Inherited
getMinBoundsHeight(postLayoutTransform:Boolean = true):Number
Returns the element's minimum height.
UIComponent
 Inherited
getMinBoundsWidth(postLayoutTransform:Boolean = true):Number
Returns the element's minimum width.
UIComponent
 Inherited
Returns an array of objects that lie under the specified point and are children (or grandchildren, and so on) of this DisplayObjectContainer instance.
DisplayObjectContainer
 Inherited
getPreferredBoundsHeight(postLayoutTransform:Boolean = true):Number
Returns the element's preferred height.
UIComponent
 Inherited
getPreferredBoundsWidth(postLayoutTransform:Boolean = true):Number
Returns the element's preferred width.
UIComponent
 Inherited
getRect(targetCoordinateSpace:DisplayObject):Rectangle
Returns a rectangle that defines the boundary of the display object, based on the coordinate system defined by the targetCoordinateSpace parameter, excluding any strokes on shapes.
DisplayObject
  
getRendererSemanticValue(target:Object, semanticProperty:String):Object
Returns true or false to indicates whether the effect should play on the target.
ListBase
 Inherited
getRepeaterItem(whichRepeater:int = -1):Object
Returns the item in the dataProvider that was used by the specified Repeater to produce this Repeater, or null if this Repeater isn't repeated.
UIComponent
 Inherited
getStyle(styleProp:String):*
Gets a style property that has been set anywhere in this component's style lookup chain.
UIComponent
 Inherited
Converts a Point object from global to content coordinates.
UIComponent
 Inherited
Converts the point object from the Stage (global) coordinates to the display object's (local) coordinates.
DisplayObject
 Inherited
Converts a two-dimensional point from the Stage (global) coordinates to a three-dimensional display object's (local) coordinates.
DisplayObject
 Inherited
Checks whether the EventDispatcher object has any listeners registered for a specific type of event.
EventDispatcher
 Inherited
Indicates whether an object has a specified property defined.
Object
 Inherited
Determines whether the specified state has been defined on this UIComponent.
UIComponent
  
Hides the drop indicator under the mouse pointer that indicates that a drag and drop operation is allowed.
ListBase
 Inherited
Evaluates the bounding box of the display object to see if it overlaps or intersects with the bounding box of the obj display object.
DisplayObject
 Inherited
hitTestPoint(x:Number, y:Number, shapeFlag:Boolean = false):Boolean
Evaluates the display object to see if it overlaps or intersects with the point specified by the x and y parameters.
DisplayObject
 Inherited
Returns a box Matrix which can be passed to the drawRoundRect() method as the rot parameter when drawing a horizontal gradient.
UIComponent
  
Get an item renderer for the index of an item in the data provider, if one exists.
ListBase
  
indicesToIndex(rowIndex:int, colIndex:int):int
Computes the offset into the data provider of the item at colIndex, rowIndex.
ListBase
 Inherited
Initializes the internal structure of this component.
UIComponent
 Inherited
Initializes various properties which keep track of repeated instances of this component.
UIComponent
 Inherited
Marks a component so that its updateDisplayList() method gets called during a later screen update.
UIComponent
 Inherited
Called by a component's items to indicate that their depth property has changed.
UIComponent
 Inherited
An element must call this method when its layoutDirection changes or when its parent's layoutDirection changes.
UIComponent
  
Refresh all rows on the next update.
ListBase
 Inherited
Marks a component so that its commitProperties() method gets called during a later screen update.
UIComponent
 Inherited
Marks a component so that its measure() method gets called during a later screen update.
UIComponent
  
Determines if the item renderer for a data provider item is highlighted (is rolled over via the mouse or under the caret due to keyboard navigation).
ListBase
  
Determines if the item renderer for a data provider item is selectable.
ListBase
  
Determines if the item renderer for a data provider item is selected.
ListBase
  
Determines if the item renderer for a data provider item is the item under the caret due to keyboard navigation.
ListBase
  
Determines if an item is being displayed by a renderer.
ListBase
 Inherited
Indicates whether an instance of the Object class is in the prototype chain of the object specified as the parameter.
Object
  
Determines whether a renderer contains (or owns) a display object.
ListBase
  
Returns the index of the item in the data provider of the item being rendered by this item renderer.
ListBase
  
Returns the dataTip string the renderer would display for the given data object based on the dataTipField and dataTipFunction properties.
ListBase
  
Returns the class for an icon, if any, for a data item, based on the iconField and iconFunction properties.
ListBase
  
Returns the item renderer for a given item in the data provider, if there is one.
ListBase
  
Returns the string the renderer would display for the given data object based on the labelField and labelFunction properties.
ListBase
 Inherited
Converts a three-dimensional point of the three-dimensional display object's (local) coordinates to a two-dimensional point in the Stage (global) coordinates.
DisplayObject
 Inherited
Converts a Point object from local to content coordinates.
UIComponent
 Inherited
Converts the point object from the display object's (local) coordinates to the Stage (global) coordinates.
DisplayObject
 Inherited
Returns true if cssState matches currentCSSState.
UIComponent
 Inherited
Determines whether this instance is the same as, or is a subclass of, the given type.
UIComponent
  
measureHeightOfItems(index:int = -1, count:int = 0):Number
Measures a set of items from the data provider using the current item renderer and returns the sum of the heights of those items.
ListBase
 Inherited
Measures the specified HTML text, which can contain HTML tags such as <font> and <b>, assuming that it is displayed in a single-line UITextField using a UITextFormat determined by the styles of this UIComponent.
UIComponent
 Inherited
Measures the specified text, assuming that it is displayed in a single-line UITextField (or UIFTETextField) using a UITextFormat determined by the styles of this UIComponent.
UIComponent
  
measureWidthOfItems(index:int = -1, count:int = 0):Number
Measures a set of items from the data provider using the current item renderer and returns the maximum width found.
ListBase
 Inherited
Moves the component to a specified position within its parent.
UIComponent
 Inherited
Propagates style changes to the children.
UIComponent
 Inherited
Returns true if the chain of owner properties points from child to this UIComponent.
UIComponent
 Inherited
Called by Flex when a UIComponent object is added to or removed from a parent.
UIComponent
 Inherited
Prepares an IFlexDisplayObject for printing.
UIComponent
 Inherited
Indicates whether the specified property exists and is enumerable.
Object
 Inherited
Builds or rebuilds the CSS style cache for this component and, if the recursive parameter is true, for all descendants of this component as well.
UIComponent
 Inherited
For each effect event, registers the EffectManager as one of the event listeners.
UIComponent
 Inherited
Removes the specified child DisplayObject instance from the child list of the DisplayObjectContainer instance.
DisplayObjectContainer
 Inherited
Removes a child DisplayObject from the specified index position in the child list of the DisplayObjectContainer.
DisplayObjectContainer
  
Removes an item renderer if a data change effect is running.
ListBase
 Inherited
removeEventListener(type:String, listener:Function, useCapture:Boolean = false):void
Removes a listener from the EventDispatcher object.
EventDispatcher
 Inherited
Replays the specified event.
UIComponent
 Inherited
Resolves a child by using the id provided.
UIComponent
 Inherited
[static] Resumes the background processing of methods queued by callLater(), after a call to suspendBackgroundProcessing().
UIComponent
  
Ensures that the data provider item at the given index is visible.
ListBase
 Inherited
Sizes the object.
UIComponent
 Inherited
Changes the position of an existing child in the display object container.
DisplayObjectContainer
 Inherited
setConstraintValue(constraintName:String, value:*):void
Sets a layout constraint value, which is the same as setting the constraint style for this component.
UIComponent
 Inherited
setCurrentState(stateName:String, playTransition:Boolean = true):void
Set the current state.
UIComponent
 Inherited
Sets the focus to this component.
UIComponent
 Inherited
setLayoutBoundsPosition(x:Number, y:Number, postLayoutTransform:Boolean = true):void
Sets the coordinates that the element uses to draw on screen.
UIComponent
 Inherited
setLayoutBoundsSize(width:Number, height:Number, postLayoutTransform:Boolean = true):void
Sets the layout size of the element.
UIComponent
 Inherited
setLayoutMatrix(value:Matrix, invalidateLayout:Boolean):void
Sets the transform Matrix that is used to calculate the component's layout size and position relative to its siblings.
UIComponent
 Inherited
setLayoutMatrix3D(value:Matrix3D, invalidateLayout:Boolean):void
Sets the transform Matrix3D that is used to calculate the component's layout size and position relative to its siblings.
UIComponent
 Inherited
Sets the availability of a dynamic property for loop operations.
Object
 Inherited
setStyle(styleProp:String, newValue:*):void
Sets a style property on this component instance.
UIComponent
 Inherited
setVisible(value:Boolean, noEvent:Boolean = false):void
Called when the visible property changes.
UIComponent
  
Displays a drop indicator under the mouse pointer to indicate that a drag and drop operation is allowed and where the items will be dropped.
ListBase
 Inherited
startDrag(lockCenter:Boolean = false, bounds:Rectangle = null):void
Lets the user drag the specified sprite.
Sprite
 Inherited
startTouchDrag(touchPointID:int, lockCenter:Boolean = false, bounds:Rectangle = null):void
Lets the user drag the specified sprite on a touch-enabled device.
Sprite
 Inherited
Ends the startDrag() method.
Sprite
 Inherited
stopTouchDrag(touchPointID:int):void
Ends the startTouchDrag() method, for use with touch-enabled devices.
Sprite
 Inherited
Detects changes to style properties.
UIComponent
 Inherited
Flex calls the stylesInitialized() method when the styles for a component are first initialized.
UIComponent
 Inherited
[static] Blocks the background processing of methods queued by callLater(), until resumeBackgroundProcessing() is called.
UIComponent
 Inherited
Swaps the z-order (front-to-back order) of the two specified child objects.
DisplayObjectContainer
 Inherited
swapChildrenAt(index1:int, index2:int):void
Swaps the z-order (front-to-back order) of the child objects at the two specified index positions in the child list.
DisplayObjectContainer
 Inherited
Returns the string representation of this object, formatted according to locale-specific conventions.
Object
 Inherited
[override] Returns a string indicating the location of this object within the hierarchy of DisplayObjects in the Application.
FlexSprite
 Inherited
transformAround(transformCenter:Vector3D, scale:Vector3D = null, rotation:Vector3D = null, translation:Vector3D = null, postLayoutScale:Vector3D = null, postLayoutRotation:Vector3D = null, postLayoutTranslation:Vector3D = null, invalidateLayout:Boolean = true):void
A utility method to update the rotation, scale, and translation of the transform while keeping a particular point, specified in the component's own coordinate space, fixed in the parent's coordinate space.
UIComponent
 Inherited
transformPointToParent(localPosition:Vector3D, position:Vector3D, postLayoutPosition:Vector3D):void
A utility method to transform a point specified in the local coordinates of this object to its location in the object's parent's coordinates.
UIComponent
  
Called by an UnconstrainItemAction effect as part of a data change effect if the item renderers corresponding to certain data items need to move outside the normal positions of item renderers in the control.
ListBase
 Inherited
Validates the position and size of children and draws other visuals.
UIComponent
 Inherited
Validate and update the properties and layout of this object and redraw it, if necessary.
UIComponent
 Inherited
Used by layout logic to validate the properties of a component by calling the commitProperties() method.
UIComponent
 Inherited
validateSize(recursive:Boolean = false):void
Validates the measured size of the component If the LayoutManager.invalidateSize() method is called with this ILayoutManagerClient, then the validateSize() method is called when it's time to do measurements.
UIComponent
 Inherited
Handles both the valid and invalid events from a validator assigned to this component.
UIComponent
 Inherited
Returns the primitive value of the specified object.
Object
 Inherited
Returns a box Matrix which can be passed to drawRoundRect() as the rot parameter when drawing a vertical gradient.
UIComponent
 Inherited
Checks whether an event listener is registered with this EventDispatcher object or any of its ancestors for the specified event type.
EventDispatcher
Protected Methods
 MethodDefined By
  
addDragData(dragSource:Object):void
Adds the selected items to the DragSource object as part of a drag-and-drop operation.
ListBase
  
Adds a renderer to the recycled renderer list, making it invisible and cleaning up references to it.
ListBase
  
Add a blank row to the beginning of the arrays that store references to the rows.
ListBase
 Inherited
Adjust the focus rectangle.
UIComponent
  
adjustListContent(unscaledWidth:Number = -1, unscaledHeight:Number = -1):void
Called from the updateDisplayList() method to adjust the size and position of listContent.
ListBase
 Inherited
Commits the computed matrix built from the combination of the layout matrix and the transform offsets to the flash displayObject's transform.
UIComponent
  
Sets up the effect for applying the selection indicator.
ListBase
 Inherited
This is an internal method used by the Flex framework to support the Dissolve effect.
UIComponent
  
Calculates the y position of the drop indicator when performing a drag-and-drop operation.
ListBase
 Inherited
Determines if the call to the measure() method can be skipped.
UIComponent
 Inherited
Performs any final processing after child objects are created.
UIComponent
  
Clears the caret indicator into the given Sprite.
ListBase
  
Clears the highlight indicator in the given Sprite.
ListBase
  
Removes all selection and highlight and caret indicators.
ListBase
  
clearSelected(transition:Boolean = false):void
Clears the set of selected items and removes all graphics depicting the selected state of those items.
ListBase
  
Empty the visibleData hash table.
ListBase
  
Handles CollectionEvents dispatched from the data provider as the data changes.
ListBase
  
[override] Calculates the column width and row height and number of rows and columns based on whether properties like columnCount columnWidth, rowHeight and rowCount were explicitly set.
ListBase
  
Configures the ScrollBars based on the number of rows and columns and viewable rows and columns.
ListBase
  
Makes a deep copy of the object by calling the ObjectUtil.copy() method, and replaces the copy's uid property (if present) with a new value by calling the UIDUtil.createUID() method.
ListBase
  
copySelectedItems(useDataField:Boolean = true):Array
Copies the selected items in the order that they were selected.
ListBase
 Inherited
Creates the border for this component.
ScrollControlBase
  
[override] Creates objects that are children of this ListBase; in this case, the listContent object that will hold all the item renderers.
ListBase
 Inherited
Creates a new object using a context based on the embedded font being used.
UIComponent
 Inherited
Creates the object using a given moduleFactory.
UIComponent
  
destroyRow(i:int, numCols:int):void
Recycle a row that is no longer needed, and remove its indicators.
ListBase
 Inherited
dispatchPropertyChangeEvent(prop:String, oldValue:*, value:*):void
Helper method for dispatching a PropertyChangeEvent when a property is updated.
UIComponent
  
Handles DragEvent.DRAG_COMPLETE events.
ListBase
  
Handles DragEvent.DRAG_DROP events.
ListBase
  
Handles DragEvent.DRAG_ENTER events.
ListBase
  
Handles DragEvent.DRAG_EXIT events.
ListBase
  
Handles DragEvent.DRAG_OVER events.
ListBase
  
Interval function that scrolls the list up or down if the mouse goes above or below the list.
ListBase
  
The default handler for the dragStart event.
ListBase
  
drawCaretIndicator(indicator:Sprite, x:Number, y:Number, width:Number, height:Number, color:uint, itemRenderer:IListItemRenderer):void
Draws the caret indicator into the given Sprite at the position, width and height specified using the color specified.
ListBase
  
drawHighlightIndicator(indicator:Sprite, x:Number, y:Number, width:Number, height:Number, color:uint, itemRenderer:IListItemRenderer):void
Draws the highlight indicator into the given Sprite at the position, width and height specified using the color specified.
ListBase
  
drawItem(item:IListItemRenderer, selected:Boolean = false, highlighted:Boolean = false, caret:Boolean = false, transition:Boolean = false):void
Draws the renderer with indicators that it is highlighted, selected, or the caret.
ListBase
  
Draws any alternating row colors, borders and backgrounds for the rows.
ListBase
  
drawSelectionIndicator(indicator:Sprite, x:Number, y:Number, width:Number, height:Number, color:uint, itemRenderer:IListItemRenderer):void
Draws the selection indicator into the given Sprite at the position, width and height specified using the color specified.
ListBase
  
findKey(eventCode:int):Boolean
Tries to find the next item in the data provider that starts with the character in the eventCode parameter.
ListBase
  
Cleans up after a data change effect has finished running by restoring the original collection and iterator and removing any cached values used by the effect.
ListBase
  
Sets selected items based on the caretIndex and anchorIndex properties.
ListBase
 Inherited
The event handler called when a UIComponent object gets focus.
UIComponent
 Inherited
The event handler called when a UIComponent object loses focus.
UIComponent
  
Retrieves an already-created item renderer not currently in use.
ListBase
  
The column for the data provider item at the given index.
ListBase
  
The row for the data provider item at the given index.
ListBase
 Inherited
Initializes the implementation and storage of some of the less frequently used advanced layout features of a component.
UIComponent
 Inherited
Finalizes the initialization of this component.
UIComponent
 Inherited
Initializes this component's accessibility code.
UIComponent
  
initiateDataChangeEffect(unscaledWidth:Number, unscaledHeight:Number):void
Initiates a data change effect when there have been changes in the data provider.
ListBase
 Inherited
Helper method to invalidate parent size and display list if this object affects its layout (includeInLayout is true).
UIComponent
 Inherited
Typically overridden by components containing UITextField objects, where the UITextField object gets focus.
UIComponent
  
Returns true if an item renderer is no longer being positioned by the list's layout algorithm while a data change effect is running as a result of a call to the unconstrainRenderer() method.
ListBase
  
Returns a Point containing the columnIndex and rowIndex of an item renderer.
ListBase
  
Determines the UID for a data provider item.
ListBase
 Inherited
The event handler called for a keyDown event.
UIComponent
 Inherited
The event handler called for a keyUp event.
UIComponent
 Inherited
layoutChrome(unscaledWidth:Number, unscaledHeight:Number):void
Responds to size changes by setting the positions and sizes of this control's borders.
ScrollControlBase
  
makeRowsAndColumns(left:Number, top:Number, right:Number, bottom:Number, firstColumn:int, firstRow:int, byCount:Boolean = false, rowsNeeded:uint = 0):Point
Make enough rows and columns to fill the area described by left, top, right, bottom.
ListBase
  
[override] Calculates the measured width and height of the component based on the rowCount, columnCount, rowHeight and columnWidth properties.
ListBase
  
Handles MouseEvent.MOUSE_CLICK events from any mouse targets contained in the list including the renderers.
ListBase
  
Handles MouseEvent.MOUSE_DOUBLE_CLICK events from any mouse targets contained in the list including the renderers.
ListBase
  
Handles MouseEvent.MOUSE_DOWN events from any mouse targets contained in the list including the renderers.
ListBase
  
Determines which item renderer is under the mouse.
ListBase
  
Handles MouseEvent.MOUSE_MOVE events from any mouse targets contained in the list including the renderers.
ListBase
  
Handles MouseEvent.MOUSE_OUT events from any mouse targets contained in the list including the renderers.
ListBase
  
Handles MouseEvent.MOUSE_OVER events from any mouse targets contained in the list, including the renderers.
ListBase
  
Handles MouseEvent.MOUSE_DOWN events from any mouse targets contained in the list including the renderers.
ListBase
  
[override] Handles mouseWheel events by changing scroll positions.
ListBase
  
Move the selection and highlight indicators horizontally.
ListBase
  
moveIndicatorsVertically(uid:String, moveBlockDistance:Number):void
Move the selection and highlight indicators vertically.
ListBase
  
moveRowVertically(i:int, numCols:int, moveBlockDistance:Number):void
Move a row vertically, and update the rowInfo record.
ListBase
  
Moves the selection in a horizontal direction in response to the user selecting items using the left arrow or right arrow keys and modifiers such as the Shift and Ctrl keys.
ListBase
  
Moves the selection in a vertical direction in response to the user selecting items using the up arrow or down arrow Keys and modifiers such as the Shift and Ctrl keys.
ListBase
  
Prepares the data effect for the collection event.
ListBase
  
Called by the updateDisplayList() method to remove existing item renderers and clean up various caching structures when the renderer changes.
ListBase
  
Update the keys in the visibleData hash table.
ListBase
  
Remove a row from the arrays that store references to the row.
ListBase
  
Cleans up selection highlights and other associated graphics for a given item in the data provider.
ListBase
 Inherited
This method is called when a UIComponent is constructed, and again whenever the ResourceManager dispatches a "change" Event to indicate that the localized resources have changed in some way.
UIComponent
  
Remove the requested number of rows from the beginning of the arrays that store references to the rows.
ListBase
 Inherited
roomForScrollBar(bar:ScrollBar, unscaledWidth:Number, unscaledHeight:Number):Boolean
Determines if there is enough space in this component to display a given scrollbar.
ScrollControlBase
 Inherited
Default event handler for the scroll event.
ScrollControlBase
  
scrollHorizontally(pos:int, deltaPos:int, scrollUp:Boolean):void
Adjusts the renderers in response to a change in scroll position.
ListBase
  
scrollPositionToIndex(horizontalScrollPosition:int, verticalScrollPosition:int):int
Returns the data provider index for the item at the first visible row and column for the given scroll positions.
ListBase
  
scrollVertically(pos:int, deltaPos:int, scrollUp:Boolean):void
Adjusts the renderers in response to a change in scroll position.
ListBase
  
The default failure handler when a seek fails due to a page fault.
ListBase
  
The default result handler when a seek fails due to a page fault.
ListBase
  
Seek to a position, and handle an ItemPendingError if necessary.
ListBase
  
selectItem(item:IListItemRenderer, shiftKey:Boolean, ctrlKey:Boolean, transition:Boolean = true):Boolean
Updates the set of selected items given that the item renderer provided was clicked by the mouse and the keyboard modifiers are in the given state.
ListBase
  
Sets the rowCount property without causing invalidation or setting the explicitRowCount property, which permanently locks in the number of rows.
ListBase
  
Sets the rowHeight property without causing invalidation or setting of explicitRowHeight which permanently locks in the height of the rows.
ListBase
 Inherited
setScrollBarProperties(totalColumns:int, visibleColumns:int, totalRows:int, visibleRows:int):void
Causes the ScrollControlBase to show or hide scrollbars based on the parameters passed in.
ScrollControlBase
 Inherited
setStretchXY(stretchX:Number, stretchY:Number):void
Specifies a transform stretch factor in the horizontal and vertical direction.
UIComponent
  
shiftRow(oldIndex:int, newIndex:int, numCols:int, shiftItems:Boolean):void
Shift a row in the arrays that reference rows.
ListBase
 Inherited
stateChanged(oldState:String, newState:String, recursive:Boolean):void
This method is called when a state changes to check whether state-specific styles apply to this component.
UIComponent
  
sumRowHeights(startRowIdx:int, endRowIdx:int):Number
Determine the height of the requested set of rows.
ListBase
  
Remove all remaining rows from the end of the arrays that store references to the rows.
ListBase
  
Find an item renderer based on its UID if it is visible.
ListBase
  
updateDisplayList(unscaledWidth:Number, unscaledHeight:Number):void
[override] Adds or removes item renderers if the number of displayable items changed.
ListBase
  
Refreshes all rows.
ListBase
Events
 Event Summary Defined By
 Inherited[broadcast event] Dispatched when the Flash Player or AIR application gains operating system focus and becomes active.EventDispatcher
 InheritedDispatched when the component is added to a container as a content child by using the addChild(), addChildAt(), addElement(), or addElementAt() method.UIComponent
 InheritedDispatched when a display object is added to the display list.DisplayObject
 InheritedDispatched when a display object is added to the on stage display list, either directly or through the addition of a sub tree in which the display object is contained.DisplayObject
  Dispatched when the selectedIndex or selectedItem property changes as a result of user interaction.ListBase
 InheritedDispatched when the user selects 'Clear' (or 'Delete') from the text context menu.InteractiveObject
 InheritedDispatched when a user presses and releases the main button of the user's pointing device over the same InteractiveObject.InteractiveObject
 InheritedDispatched when a user gesture triggers the context menu associated with this interactive object in an AIR application.InteractiveObject
 InheritedDispatched when the user activates the platform specific accelerator key combination for a copy operation or selects 'Copy' from the text context menu.InteractiveObject
 InheritedDispatched when the component has finished its construction, property processing, measuring, layout, and drawing.UIComponent
 InheritedDispatched after the view state has changed.UIComponent
 InheritedDispatched after the currentState property changes, but before the view state changes.UIComponent
 InheritedDispatched when the user activates the platform specific accelerator key combination for a cut operation or selects 'Cut' from the text context menu.InteractiveObject
  Dispatched when the data property changes.ListBase
 Inherited[broadcast event] Dispatched when the Flash Player or AIR application operating loses system focus and is becoming inactive.EventDispatcher
 InheritedDispatched when a user presses and releases the main button of a pointing device twice in rapid succession over the same InteractiveObject when that object's doubleClickEnabled flag is set to true.InteractiveObject
 InheritedDispatched by the drag initiator (the component that is the source of the data being dragged) when the drag operation completes, either when you drop the dragged data onto a drop target or when you end the drag-and-drop operation without performing a drop.UIComponent
 InheritedDispatched by the drop target when the user releases the mouse over it.UIComponent
 InheritedDispatched by a component when the user moves the mouse over the component during a drag operation.UIComponent
 InheritedDispatched by the component when the user drags outside the component, but does not drop the data onto the target.UIComponent
 InheritedDispatched by a component when the user moves the mouse while over the component during a drag operation.UIComponent
 InheritedDispatched by the drag initiator when starting a drag operation.UIComponent
 InheritedDispatched after an effect ends.UIComponent
 InheritedDispatched just before an effect starts.UIComponent
 InheritedDispatched after an effect is stopped, which happens only by a call to stop() on the effect.UIComponent
 Inherited[broadcast event] Dispatched when the playhead is entering a new frame.DisplayObject
 InheritedDispatched after the component has entered a view state.UIComponent
 Inherited[broadcast event] Dispatched when the playhead is exiting the current frame.DisplayObject
 InheritedDispatched just before the component exits a view state.UIComponent
 InheritedDispatched after a display object gains focus.InteractiveObject
 InheritedDispatched after a display object loses focus.InteractiveObject
 Inherited[broadcast event] Dispatched after the constructors of frame display objects have run but before frame scripts have run.DisplayObject
 InheritedDispatched when the user moves a point of contact over the InteractiveObject instance on a touch-enabled device (such as moving a fingers from left to right over a display object on a mobile phone or tablet with a touch screen).InteractiveObject
 InheritedDispatched when the user creates a point of contact with an InteractiveObject instance, then taps on a touch-enabled device (such as placing several fingers over a display object to open a menu and then taps one finger to select a menu item on a mobile phone or tablet with a touch screen).InteractiveObject
 InheritedDispatched when the user performs a rotation gesture at a point of contact with an InteractiveObject instance (such as touching two fingers and rotating them over a display object on a mobile phone or tablet with a touch screen).InteractiveObject
 InheritedDispatched when the user performs a swipe gesture at a point of contact with an InteractiveObject instance (such as touching three fingers to a screen and then moving them in parallel over a display object on a mobile phone or tablet with a touch screen).InteractiveObject
 InheritedDispatched when the user presses two points of contact over the same InteractiveObject instance on a touch-enabled device (such as presses and releases two fingers over a display object on a mobile phone or tablet with a touch screen).InteractiveObject
 InheritedDispatched when the user performs a zoom gesture at a point of contact with an InteractiveObject instance (such as touching two fingers to a screen and then quickly spreading the fingers apart over a display object on a mobile phone or tablet with a touch screen).InteractiveObject
 InheritedDispatched when an object's state changes from visible to invisible.UIComponent
 InheritedThis event is dispatched to any client app that supports inline input with an IMEInteractiveObject
 InheritedDispatched when the component has finished its construction and has all initialization properties set.UIComponent
 InheritedDispatched when a component is monitored by a Validator and the validation failed.UIComponent
  Dispatched when the user clicks on an item in the control.ListBase
  Dispatched when the user double-clicks on an item in the control.ListBase
  Dispatched when the user rolls the mouse pointer out of an item in the control.ListBase
  Dispatched when the user rolls the mouse pointer over an item in the control.ListBase
 InheritedDispatched when the user presses a key.InteractiveObject
 InheritedDispatched when the user attempts to change focus by using keyboard navigation.InteractiveObject
 InheritedDispatched when the user releases a key.InteractiveObject
 InheritedDispatched when a user presses and releases the middle button of the user's pointing device over the same InteractiveObject.InteractiveObject
 InheritedDispatched when a user presses the middle pointing device button over an InteractiveObject instance.InteractiveObject
 InheritedDispatched when a user releases the pointing device button over an InteractiveObject instance.InteractiveObject
 InheritedDispatched when a user presses the pointing device button over an InteractiveObject instance.InteractiveObject
 InheritedDispatched from a component opened using the PopUpManager when the user clicks outside it.UIComponent
 InheritedDispatched when the user attempts to change focus by using a pointer device.InteractiveObject
 InheritedDispatched when a user moves the pointing device while it is over an InteractiveObject.InteractiveObject
 InheritedDispatched when the user moves a pointing device away from an InteractiveObject instance.InteractiveObject
 InheritedDispatched when the user moves a pointing device over an InteractiveObject instance.InteractiveObject
 InheritedDispatched when a user releases the pointing device button over an InteractiveObject instance.InteractiveObject
 InheritedDispatched when a mouse wheel is spun over an InteractiveObject instance.InteractiveObject
 InheritedDispatched from a component opened using the PopUpManager when the user scrolls the mouse wheel outside it.UIComponent
 InheritedDispatched when the object has moved.UIComponent
 InheritedDispatched by the drag initiator InteractiveObject when the user releases the drag gesture.InteractiveObject
 InheritedDispatched by the target InteractiveObject when a dragged object is dropped on it and the drop has been accepted with a call to DragManager.acceptDragDrop().InteractiveObject
 InheritedDispatched by an InteractiveObject when a drag gesture enters its boundary.InteractiveObject
 InheritedDispatched by an InteractiveObject when a drag gesture leaves its boundary.InteractiveObject
 InheritedDispatched by an InteractiveObject continually while a drag gesture remains within its boundary.InteractiveObject
 InheritedDispatched at the beginning of a drag operation by the InteractiveObject that is specified as the drag initiator in the DragManager.doDrag() call.InteractiveObject
 InheritedDispatched during a drag operation by the InteractiveObject that is specified as the drag initiator in the DragManager.doDrag() call.InteractiveObject
 InheritedDispatched when the user activates the platform specific accelerator key combination for a paste operation or selects 'Paste' from the text context menu.InteractiveObject
 InheritedDispatched at the beginning of the component initialization sequence.UIComponent
 InheritedDispatched when the component is removed from a container as a content child by using the removeChild(), removeChildAt(), removeElement(), or removeElementAt() method.UIComponent
 InheritedDispatched when a display object is about to be removed from the display list.DisplayObject
 InheritedDispatched when a display object is about to be removed from the display list, either directly or through the removal of a sub tree in which the display object is contained.DisplayObject
 Inherited[broadcast event] Dispatched when the display list is about to be updated and rendered.DisplayObject
 InheritedDispatched when the component is resized.UIComponent
 InheritedDispatched when a user presses and releases the right button of the user's pointing device over the same InteractiveObject.InteractiveObject
 InheritedDispatched when a user presses the pointing device button over an InteractiveObject instance.InteractiveObject
 InheritedDispatched when a user releases the pointing device button over an InteractiveObject instance.InteractiveObject
 InheritedDispatched when the user moves a pointing device away from an InteractiveObject instance.InteractiveObject
 InheritedDispatched when the user moves a pointing device over an InteractiveObject instance.InteractiveObject
 InheritedDispatched when the content is scrolled.ScrollControlBase
 InheritedDispatched when the user activates the platform specific accelerator key combination for a select all operation or selects 'Select All' from the text context menu.InteractiveObject
 InheritedDispatched when an object's state changes from invisible to visible.UIComponent
 InheritedDispatched when the value of the object's tabChildren flag changes.InteractiveObject
 InheritedDispatched when the object's tabEnabled flag changes.InteractiveObject
 InheritedDispatched when the value of the object's tabIndex property changes.InteractiveObject
 InheritedDispatched when a user enters one or more characters of text.InteractiveObject
 InheritedDispatched by the component when it is time to create a ToolTip.UIComponent
 InheritedDispatched by the component when its ToolTip has been hidden and is to be discarded soon.UIComponent
 InheritedDispatched by the component when its ToolTip is about to be hidden.UIComponent
 InheritedDispatched by the component when its ToolTip is about to be shown.UIComponent
 InheritedDispatched by the component when its ToolTip has been shown.UIComponent
 InheritedDispatched by a component whose toolTip property is set, as soon as the user moves the mouse over it.UIComponent
 InheritedDispatched when the user first contacts a touch-enabled device (such as touches a finger to a mobile phone or tablet with a touch screen).InteractiveObject
 InheritedDispatched when the user removes contact with a touch-enabled device (such as lifts a finger off a mobile phone or tablet with a touch screen).InteractiveObject
 InheritedDispatched when the user moves the point of contact with a touch-enabled device (such as drags a finger across a mobile phone or tablet with a touch screen).InteractiveObject
 InheritedDispatched when the user moves the point of contact away from InteractiveObject instance on a touch-enabled device (such as drags a finger from one display object to another on a mobile phone or tablet with a touch screen).InteractiveObject
 InheritedDispatched when the user moves the point of contact over an InteractiveObject instance on a touch-enabled device (such as drags a finger from a point outside a display object to a point over a display object on a mobile phone or tablet with a touch screen).InteractiveObject
 InheritedDispatched when the user moves the point of contact away from an InteractiveObject instance on a touch-enabled device (such as drags a finger from over a display object to a point outisde the display object on a mobile phone or tablet with a touch screen).InteractiveObject
 InheritedDispatched when the user moves the point of contact over an InteractiveObject instance on a touch-enabled device (such as drags a finger from a point outside a display object to a point over a display object on a mobile phone or tablet with a touch screen).InteractiveObject
 InheritedDispatched when the user lifts the point of contact over the same InteractiveObject instance on which the contact was initiated on a touch-enabled device (such as presses and releases a finger from a single point over a display object on a mobile phone or tablet with a touch screen).InteractiveObject
 InheritedDispatched when an object has had its commitProperties(), measure(), and updateDisplayList() methods called (if needed).UIComponent
 InheritedDispatched when a component is monitored by a Validator and the validation succeeded.UIComponent
 InheritedDispatched when values are changed programmatically or by user interaction.UIComponent
Styles

Styles are either common or associated with a specific theme. If the style is common, it can be used with any theme. If a style is associated with a specific theme, it can only be used if your application uses that theme.

Common Styles
 Style Description Defined By
  
alternatingItemColors
Type: Array Format: Color CSS Inheritance: yes
The colors to use for the backgrounds of the items in the list. The value is an array of two or more colors. The backgrounds of the list items alternate among the colors in the array.

For DataGrid controls, all items in a row have the same background color, and each row's background color is determined from the array of colors.

For the TileList control, which uses a single list to populate a two-dimensional display, the style can result in a checkerboard appearance, stripes, or other patterns based on the number of columns and rows and the number of colors specified. TileList cycles through the colors, placing the individual item background colors according to the layout direction. If you have an even number of colors and an even number of columns for a TileList layed out horizontally, you will get striping. If the number of columns is an odd number, you will get a checkerboard pattern.

The default value is undefined.
ListBase
 InheritedType: String CSS Inheritance: no
The vertical distance in pixels from the top edge of the content area to the control's baseline position.
UIComponent
 InheritedType: Class CSS Inheritance: no
The border skin class of the component.
ScrollControlBase
 InheritedType: String CSS Inheritance: no
Bounding box style.
ScrollControlBase
 InheritedType: String CSS Inheritance: no
The vertical distance, in pixels, from the bottom edge of the component to the bottom edge of its parent container's content area.
UIComponent
 InheritedType: uint Format: Color CSS Inheritance: yes
Color of text in the component, including the component label.
ScrollControlBase
 InheritedType: String CSS Inheritance: yes
The directionality of the text displayed by the component.
ScrollControlBase
 InheritedType: uint Format: Color CSS Inheritance: yes
Color of text in the component if it is disabled.
ScrollControlBase
  
dropIndicatorSkin
Type: Class CSS Inheritance: no
The skin to use to indicate where a dragged item can be dropped. When a ListBase-derived component is a potential drop target in a drag-and-drop operation, a call to the showDropFeedback() method makes an instance of this class and positions it one pixel above the itemRenderer for the item where, if the drop occurs, is the item after the dropped item. The default value is mx.controls.listClasses.ListDropIndicator.
ListBase
 InheritedType: uint Format: Color CSS Inheritance: yes
Color of the component highlight when validation fails.
UIComponent
 InheritedType: Number CSS Inheritance: no
Specifies the alpha transparency value of the focus skin.
ScrollControlBase
 InheritedType: String CSS Inheritance: no
Blend mode used by the focus rectangle.
UIComponent
 InheritedType: String CSS Inheritance: no
Specifies which corners of the focus rectangle should be rounded.
ScrollControlBase
 InheritedType: Class CSS Inheritance: no
Skin used to draw the focus rectangle.
UIComponent
 InheritedType: Number Format: Length CSS Inheritance: no
Thickness, in pixels, of the focus rectangle outline.
UIComponent
 InheritedType: String CSS Inheritance: yes
Sets the antiAliasType property of internal TextFields.
ScrollControlBase
 InheritedType: String CSS Inheritance: yes
Name of the font to use.
ScrollControlBase
 InheritedType: String CSS Inheritance: yes
Sets the gridFitType property of internal TextFields that represent text in Flex controls.
ScrollControlBase
 InheritedType: Number CSS Inheritance: yes
Sets the sharpness property of internal TextFields that represent text in Flex controls.
ScrollControlBase
 InheritedType: Number Format: Length CSS Inheritance: yes
Height of the text, in pixels.
ScrollControlBase
 InheritedType: String CSS Inheritance: yes
Determines whether the text is italic font.
ScrollControlBase
 InheritedType: Number CSS Inheritance: yes
Sets the thickness property of internal TextFields that represent text in Flex controls.
ScrollControlBase
 InheritedType: String CSS Inheritance: yes
Determines whether the text is boldface.
ScrollControlBase
 InheritedType: String CSS Inheritance: no
The horizontal distance in pixels from the center of the component's content area to the center of the component.
UIComponent
 InheritedType: String CSS Inheritance: no
Style name for horizontal scrollbar.
ScrollControlBase
 InheritedType: Boolean CSS Inheritance: yes
A Boolean value that indicates whether kerning is enabled (true) or disabled (false).
ScrollControlBase
 InheritedType: String CSS Inheritance: yes
Specifies the desired layout direction of a component.
UIComponent
 InheritedType: Number Format: Length CSS Inheritance: yes
Additional vertical space between lines of text.
ScrollControlBase
 InheritedType: String CSS Inheritance: no
The horizontal distance, in pixels, from the left edge of the component to the left edge of its parent container's content area.
UIComponent
 InheritedType: Number CSS Inheritance: yes
The number of additional pixels to appear between each character.
ScrollControlBase
 InheritedType: String CSS Inheritance: yes
The locale of the text displayed by this component.
ScrollControlBase
  
paddingBottom
Type: Number Format: Length CSS Inheritance: no
The number of pixels between the bottom of the row and the bottom of the renderer in the row. The default value is 2.
ListBase
  
paddingLeft
Type: Number Format: Length CSS Inheritance: no
Number of pixels between the component's left border and the left edge of its content area.

The default value is 0.

The default value for a Button control in the Halo theme is 10 and in the Spark theme is 6.

The default value for the ComboBox control is 5.

The default value for the Form container is 16.

The default value for the Tree control is 2.

ListBase
  
paddingRight
Type: Number Format: Length CSS Inheritance: no
Number of pixels between the component's right border and the right edge of its content area.

The default value is 0.

The default value for a Button control in the Halo theme is 10 and in the Spark theme is 6.

The default value for the ComboBox control is 5.

The default value for the Form container is 16.

ListBase
  
paddingTop
Type: Number Format: Length CSS Inheritance: no
The number of pixels between the top of the row and the top of the renderer in the row. The default value is 2.
ListBase
 InheritedType: String CSS Inheritance: no
The horizontal distance, in pixels, from the right edge of the component to the right edge of its parent container's content area.
UIComponent
  
rollOverColor
Type: uint Format: Color CSS Inheritance: yes
The color of the background of a renderer when the user rolls over it. The default value for the Halo theme is 0xB2E1FF. The default value for the Spark theme is 0xCEDBEF.
ListBase
  
selectionColor
Type: uint Format: Color CSS Inheritance: yes
The color of the background of a renderer when the user selects it. The default value for the Halo theme is 0x7FCEFF. The default value for the Spark theme is 0xA8C6EE.
ListBase
  
selectionDisabledColor
Type: uint Format: Color CSS Inheritance: yes
The color of the background of a renderer when the component is disabled. The default value is 0xDDDDDD.
ListBase
  
selectionDuration
Type: Number Format: Time CSS Inheritance: no
The duration of the selection effect. When an item is selected an effect plays as the background is colored. Set to 0 to disable the effect. The default value is 250.
ListBase
  
selectionEasingFunction
Type: Function CSS Inheritance: no
The easingFunction for the selection effect. When an item is selected an effect plays as the background is colored. The default is a linear fade in of the color. An easingFunction can be used for controlling the selection effect. The default value is undefined.
ListBase
 InheritedType: String CSS Inheritance: yes
Alignment of text within a container.
ScrollControlBase
 InheritedType: String CSS Inheritance: yes
Determines whether the text is underlined.
ScrollControlBase
 InheritedType: Class CSS Inheritance: no
The class implementing IUITextField that is used by this component to render text.
ScrollControlBase
 InheritedType: Number Format: Length CSS Inheritance: yes
Offset of first line of text from the left side of the container, in pixels.
ScrollControlBase
  
textRollOverColor
Type: uint Format: Color CSS Inheritance: yes
The color of the text of a renderer when the user rolls over a it. The default value for the Halo theme is 0x2B333C. The default value for the Spark theme is 0x000000.
ListBase
  
textSelectedColor
Type: uint Format: Color CSS Inheritance: yes
The color of the text of a renderer when the user selects it. The default value for the Halo theme is 0x2B333C. The default value for the Spark theme is 0x000000.
ListBase
 InheritedType: String CSS Inheritance: no
The vertical distance, in pixels, from the top edge of the component to the top edge of its parent container's content area.
UIComponent
  
useRollOver
Type: Boolean CSS Inheritance: no
A flag that controls whether items are highlighted as the mouse rolls over them. If true, rows are highlighted as the mouse rolls over them. If false, rows are highlighted only when selected. The default value is true.
ListBase
  
verticalAlign
Type: String CSS Inheritance: no
The vertical alignment of a renderer in a row. Possible values are "top", "middle", and "bottom". The DataGrid positions the renderers in a row based on this style and the paddingTop and paddingBottom styles. if the item in the columns for a row have different heights Other list classes do not use verticalAlign but the item renderers can examine this style property and adjust their layout based on it. The default value is "top".
ListBase
 InheritedType: String CSS Inheritance: no
The vertical distance in pixels from the center of the component's content area to the center of the component.
UIComponent
 InheritedType: String CSS Inheritance: no
Style name for vertical scrollbar.
ScrollControlBase
Spark Theme Styles
 Style Description Defined By
 InheritedType: uint Format: Color CSS Inheritance: yes Theme: spark
Accent color used by component skins.
ScrollControlBase
 InheritedType: Number CSS Inheritance: no Theme: spark
Alpha of the border.
ScrollControlBase
 InheritedType: uint Format: Color CSS Inheritance: no Theme: halo, spark
Color of the border.
ScrollControlBase
 InheritedType: Boolean CSS Inheritance: no Theme: spark
Visibility of the border.
ScrollControlBase
 InheritedType: uint Format: Color CSS Inheritance: yes Theme: spark
The main color for a component.
ScrollControlBase
 InheritedType: Number CSS Inheritance: yes Theme: spark
The alpha of the content background for this component.
ScrollControlBase
 InheritedType: uint Format: Color CSS Inheritance: yes Theme: spark
Color of the content area of the component.
ScrollControlBase
 InheritedType: Boolean CSS Inheritance: no Theme: spark
Boolean property that specifies whether the component has a visible drop shadow.
ScrollControlBase
 InheritedType: uint Format: Color CSS Inheritance: yes Theme: spark
Color of focus ring when the component is in focus
ScrollControlBase
 InheritedType: uint Format: Color CSS Inheritance: yes Theme: spark
Color of any symbol of a component.
ScrollControlBase
Halo Theme Styles
 Style Description Defined By
 InheritedType: Number CSS Inheritance: no Theme: halo
Alpha level of the color defined by the backgroundColor property, of the image or SWF file defined by the backgroundImage style.
ScrollControlBase
 InheritedType: uint Format: Color CSS Inheritance: no Theme: halo
Background color of a component.
ScrollControlBase
 InheritedType: uint Format: Color CSS Inheritance: yes Theme: halo
Background color of the component when it is disabled.
ScrollControlBase
 InheritedType: Object Format: File CSS Inheritance: no Theme: halo
Background image of a component.
ScrollControlBase
 InheritedType: String CSS Inheritance: no Theme: halo
Scales the image specified by backgroundImage to different percentage sizes.
ScrollControlBase
 InheritedType: uint Format: Color CSS Inheritance: no Theme: halo, spark
Color of the border.
ScrollControlBase
 InheritedType: String CSS Inheritance: no Theme: halo
Bounding box sides.
ScrollControlBase
 InheritedType: Number Format: Length CSS Inheritance: no Theme: halo
Bounding box thickness.
ScrollControlBase
 InheritedType: Number Format: Length CSS Inheritance: no Theme: halo
Radius of component corners.
ScrollControlBase
 InheritedType: uint Format: Color CSS Inheritance: yes Theme: halo
Color of the drop shadow.
ScrollControlBase
 InheritedType: Boolean CSS Inheritance: no Theme: halo
Boolean property that specifies whether the component has a visible drop shadow.
ScrollControlBase
 InheritedType: String CSS Inheritance: no Theme: halo
Direction of the drop shadow.
ScrollControlBase
 InheritedType: Number Format: Length CSS Inheritance: no Theme: halo
Distance of the drop shadow.
ScrollControlBase
 InheritedType: uint Format: Color CSS Inheritance: yes Theme: halo
Theme color of a component.
UIComponent
Effects
 Effect Description Defined By
 Inherited Triggering Event: added
Played when the component is added as a child to a Container.
UIComponent
 Inherited Triggering Event: creationComplete
Played when the component is created.
UIComponent
 Inherited Triggering Event: focusIn
Played when the component gains keyboard focus.
UIComponent
 Inherited Triggering Event: focusOut
Played when the component loses keyboard focus.
UIComponent
 Inherited Triggering Event: hide
Played when the component becomes invisible.
UIComponent
 Inherited Triggering Event: mouseDown
Played when the user presses the mouse button while over the component.
UIComponent
 Inherited Triggering Event: mouseUp
Played when the user releases the mouse button while over the component.
UIComponent
 Inherited Triggering Event: move
Played when the component is moved.
UIComponent
 Inherited Triggering Event: removed
Played when the component is removed from a Container.
UIComponent
 Inherited Triggering Event: resize
Played when the component is resized.
UIComponent
 Inherited Triggering Event: rollOut
Played when the user rolls the mouse so it is no longer over the component.
UIComponent
 Inherited Triggering Event: rollOver
Played when the user rolls the mouse over the component.
UIComponent
 Inherited Triggering Event: show
Played when the component becomes visible.
UIComponent
Public Constants
 ConstantDefined By
 InheritedDEFAULT_MAX_HEIGHT : Number = 10000
[static] The default value for the maxHeight property.
UIComponent
 InheritedDEFAULT_MAX_WIDTH : Number = 10000
[static] The default value for the maxWidth property.
UIComponent
 InheritedDEFAULT_MEASURED_HEIGHT : Number = 22
[static] The default value for the measuredHeight property.
UIComponent
 InheritedDEFAULT_MEASURED_MIN_HEIGHT : Number = 22
[static] The default value for the measuredMinHeight property.
UIComponent
 InheritedDEFAULT_MEASURED_MIN_WIDTH : Number = 40
[static] The default value for the measuredMinWidth property.
UIComponent
 InheritedDEFAULT_MEASURED_WIDTH : Number = 160
[static] The default value for the measuredWidth property.
UIComponent
Property Detail

actualCollection

property
protected var actualCollection:ICollectionView

Language Version: ActionScript 3.0
Product Version: Flex 3
Runtime Versions: Flash Player 9, AIR 1.1

A copy of the value normally stored in collection used while running data changes effects. This value should be null when a data change effect is not running.

actualIterator

property 
protected var actualIterator:IViewCursor

Language Version: ActionScript 3.0
Product Version: Flex 3
Runtime Versions: Flash Player 9, AIR 1.1

A copy of the value normally stored in iterator used while running data changes effects.

allowDragSelection

property 
public var allowDragSelection:Boolean = false

Language Version: ActionScript 3.0
Product Version: Flex 3
Runtime Versions: Flash Player 9, AIR 1.1

A flag that indicates whether drag-selection is enabled. Drag-Selection is the ability to select an item by dragging into it as opposed to normal selection where you can't have the mouse button down when you mouse over the item you want to select. This feature is used in ComboBox dropdowns to support pressing the mouse button when the mouse is over the dropdown button then dragging the mouse into the dropdown to select an item.

The default value is false.

allowItemSizeChangeNotification

property 
allowItemSizeChangeNotification:Boolean  [write-only]

Language Version: ActionScript 3.0
Product Version: Flex 3
Runtime Versions: Flash Player 9, AIR 1.1

If false, renderers cannot invalidate size of List.



Implementation
    protected function set allowItemSizeChangeNotification(value:Boolean):void

allowMultipleSelection

property 
allowMultipleSelection:Boolean

Language Version: ActionScript 3.0
Product Version: Flex 3
Runtime Versions: Flash Player 9, AIR 1.1

A flag that indicates whether you can allow more than one item to be selected at the same time. If true, users can select multiple items. There is no option to disallow discontiguous selection. Standard complex selection options are always in effect (Shift-click, Ctrl-click).

The default value is false.



Implementation
    public function get allowMultipleSelection():Boolean
    public function set allowMultipleSelection(value:Boolean):void

anchorBookmark

property 
protected var anchorBookmark:CursorBookmark

Language Version: ActionScript 3.0
Product Version: Flex 3
Runtime Versions: Flash Player 9, AIR 1.1

A bookmark to the item that is the anchor. A bookmark allows the component to quickly seek to a position in the collection of items. This property is used when selecting a set of items between the anchor and the caret or highlighted item, and when finding the selected item after a Sort or Filter is applied.

anchorIndex

property 
protected var anchorIndex:int = -1

Language Version: ActionScript 3.0
Product Version: Flex 3
Runtime Versions: Flash Player 9, AIR 1.1

The offset of the item in the data provider that is the selection anchor point.

cachedItemsChangeEffect

property 
protected var cachedItemsChangeEffect:IEffect = null

Language Version: ActionScript 3.0
Product Version: Flex 3
Runtime Versions: Flash Player 9, AIR 1.1

The effect that plays when changes occur in the data provider for the control, set through the itemsChangeEffect style.

caretBookmark

property 
protected var caretBookmark:CursorBookmark

Language Version: ActionScript 3.0
Product Version: Flex 3
Runtime Versions: Flash Player 9, AIR 1.1

A bookmark to the item under the caret. A bookmark allows the component to quickly seek to a position in the collection of items.

caretIndex

property 
protected var caretIndex:int = -1

Language Version: ActionScript 3.0
Product Version: Flex 3
Runtime Versions: Flash Player 9, AIR 1.1

The offset of the item in the data provider that is the selection caret point.

See also

caretIndicator

property 
protected var caretIndicator:Sprite

Language Version: ActionScript 3.0
Product Version: Flex 3
Runtime Versions: Flash Player 9, AIR 1.1

The DisplayObject that contains the graphics that indicate which renderer is the caret.

caretItemRenderer

property 
protected var caretItemRenderer:IListItemRenderer

Language Version: ActionScript 3.0
Product Version: Flex 3
Runtime Versions: Flash Player 9, AIR 1.1

The renderer for the item under the caret. In the selection model, there is an anchor, a caret and a highlighted item. When the mouse is being used for selection, the item under the mouse is highlighted as the mouse rolls over the item. When the mouse is clicked with no modifier keys (Shift or Ctrl), the set of selected items is cleared and the item under the highlight is selected and becomes the anchor. The caret is unused in mouse selection. If there is an anchor and another item is selected while using the Shift key, the old set of selected items is cleared, and all items between the item and the anchor are selected. Clicking items while using the Ctrl key toggles the selection of individual items and does not move the anchor.

When selecting items using the keyboard, if the arrow keys are used with no modifier keys, the old selection is cleared and the new item is selected and becomes the anchor and the caret, and a caret indicator is shown around the selection highlight. If the user uses arrow keys with the Shift key, the old selection is cleared and the items between the anchor and the new item are selected. The caret moves to the new item. If arrow keys are used with the Ctrl key, just the caret moves. The user can use the Space key to toggle selection of the item under the caret.

caretUID

property 
protected var caretUID:String

Language Version: ActionScript 3.0
Product Version: Flex 3
Runtime Versions: Flash Player 9, AIR 1.1

The UID of the item under the caret.

collection

property 
protected var collection:ICollectionView

Language Version: ActionScript 3.0
Product Version: Flex 3
Runtime Versions: Flash Player 9, AIR 1.1

An ICollectionView that represents the data provider. When you set the dataProvider property, Flex wraps the data provider as necessary to support the ICollectionView interface and sets this property to the result. The ListBase class then uses this property to access data in the provider. When you get the dataProvider property, Flex returns this value.

columnCount

property 
columnCount:int

Language Version: ActionScript 3.0
Product Version: Flex 3
Runtime Versions: Flash Player 9, AIR 1.1

The number of columns to be displayed in a TileList control or items in a HorizontalList control. For the DataGrid it is the number of visible columns. Note: Setting this property has no effect on a DataGrid control, which bases the number of columns on the control width and the individual column widths.

The default value is 4.



Implementation
    public function get columnCount():int
    public function set columnCount(value:int):void

columnWidth

property 
columnWidth:Number

Language Version: ActionScript 3.0
Product Version: Flex 3
Runtime Versions: Flash Player 9, AIR 1.1

The width of the control's columns. This property is used by TileList and HorizontalList controls; It has no effect on DataGrid controls, where you set the individual DataGridColumn widths.

The default value is 50.



Implementation
    public function get columnWidth():Number
    public function set columnWidth(value:Number):void

data

property 
data:Object

Language Version: ActionScript 3.0
Product Version: Flex 3
Runtime Versions: Flash Player 9, AIR 1.1

The item in the data provider this component should render when this component is used as an item renderer or item editor. The list class sets this property on each renderer or editor and the component displays the data. ListBase-derived classes support this property for complex situations like having a List of DataGrids or a DataGrid where one column is a List.

The list classes use the listData property in addition to the data property to determine what to display. If the list class is in a DataGrid it expects the dataField property of the column to map to a property in the data and sets selectedItem value to that property. If it is in a List or TileList control, it expects the labelField property of the list to map to a property in the data, and sets selectedItem value to that property. Otherwise it sets the selectedItem to the data itself.

This property uses the data provider but does not set it. In all cases, you must set the data provider in some other way.

You do not set this property in MXML.

This property can be used as the source for data binding. When this property is modified, it dispatches the dataChange event.



Implementation
    public function get data():Object
    public function set data(value:Object):void

See also

dataEffectCompleted

property 
protected var dataEffectCompleted:Boolean = false

Language Version: ActionScript 3.0
Product Version: Flex 3
Runtime Versions: Flash Player 9, AIR 1.1

A flag that indicates that the a data change effect has just completed. The component usually responds by cleaning up various internal data structures on the next updateDisplayList() call.

dataItemWrappersByRenderer

property 
protected var dataItemWrappersByRenderer:Dictionary

Language Version: ActionScript 3.0
Product Version: Flex 3
Runtime Versions: Flash Player 9, AIR 1.1

A dictionary mapping item renderers to the ItemWrappers used to supply their data. Only applicable if a data effect is running.

dataProvider

property 
dataProvider:Object

Language Version: ActionScript 3.0
Product Version: Flex 3
Runtime Versions: Flash Player 9, AIR 1.1

Set of data to be viewed. This property lets you use most types of objects as data providers. If you set the dataProvider property to an Array, it will be converted to an ArrayCollection. If you set the property to an XML object, it will be converted into an XMLListCollection with only one item. If you set the property to an XMLList, it will be converted to an XMLListCollection. If you set the property to an object that implements the IList or ICollectionView interface, the object will be used directly.

As a consequence of the conversions, when you get the dataProvider property, it will always be an ICollectionView, and therefore not necessarily be the type of object you used to you set the property. This behavior is important to understand if you want to modify the data in the data provider: changes to the original data may not be detected, but changes to the ICollectionView object that you get back from the dataProvider property will be detected.

The default value is null.

This property can be used as the source for data binding. When this property is modified, it dispatches the collectionChange event.



Implementation
    public function get dataProvider():Object
    public function set dataProvider(value:Object):void

See also

dataTipField

property 
dataTipField:String

Language Version: ActionScript 3.0
Product Version: Flex 3
Runtime Versions: Flash Player 9, AIR 1.1

Name of the field in the data provider items to display as the data tip. By default, the list looks for a property named label on each item and displays it. However, if the data objects do not contain a label property, you can set the dataTipField property to use a different property in the data object. An example would be "FullName" when viewing a set of people's names retrieved from a database.

The default value is null.

This property can be used as the source for data binding. When this property is modified, it dispatches the dataTipFieldChanged event.



Implementation
    public function get dataTipField():String
    public function set dataTipField(value:String):void

dataTipFunction

property 
dataTipFunction:Function

Language Version: ActionScript 3.0
Product Version: Flex 3
Runtime Versions: Flash Player 9, AIR 1.1

User-supplied function to run on each item to determine its dataTip. By default, the list looks for a property named label on each data provider item and displays it. However, some items do not have a label property nor do they have another property that can be used for displaying in the rows. An example is a data set that has lastName and firstName fields, but you want to display full names. You can supply a dataTipFunction that finds the appropriate fields and return a displayable string. The dataTipFunction is also good for handling formatting and localization.

The dataTipFunction takes a single argument which is the item in the data provider and returns a String, as the following example shows:

myDataTipFunction(item:Object):String

The default value is null.

This property can be used as the source for data binding. When this property is modified, it dispatches the dataTipFunctionChanged event.



Implementation
    public function get dataTipFunction():Function
    public function set dataTipFunction(value:Function):void

defaultColumnCount

property 
protected var defaultColumnCount:int = 4

Language Version: ActionScript 3.0
Product Version: Flex 3
Runtime Versions: Flash Player 9, AIR 1.1

The default number of columns to display. This value is used if the calculation for the number of columns results in a value less than 1 when trying to calculate the columnCount based on size or content.

The default value is 4.

defaultRowCount

property 
protected var defaultRowCount:int = 4

Language Version: ActionScript 3.0
Product Version: Flex 3
Runtime Versions: Flash Player 9, AIR 1.1

The default number of rows to display. This value is used if the calculation for the number of columns results in a value less than 1 when trying to calculate the rowCount based on size or content.

The default value is 4.

dragEnabled

property 
dragEnabled:Boolean

Language Version: ActionScript 3.0
Product Version: Flex 3
Runtime Versions: Flash Player 9, AIR 1.1

A flag that indicates whether you can drag items out of this control and drop them on other controls. If true, dragging is enabled for the control. If the dropEnabled property is also true, you can drag items and drop them within this control to reorder the items.

The default value is false.



Implementation
    public function get dragEnabled():Boolean
    public function set dragEnabled(value:Boolean):void

dragImage

property 
dragImage:IUIComponent  [read-only]

Language Version: ActionScript 3.0
Product Version: Flex 3
Runtime Versions: Flash Player 9, AIR 1.1

Gets an instance of a class that displays the visuals during a drag and drop operation.

The default value is mx.controls.listClasses.ListItemDragProxy.



Implementation
    protected function get dragImage():IUIComponent

dragImageOffsets

property 
dragImageOffsets:Point  [read-only]

Language Version: ActionScript 3.0
Product Version: Flex 3
Runtime Versions: Flash Player 9, AIR 1.1

Gets the offset of the drag image for drag and drop.



Implementation
    protected function get dragImageOffsets():Point

dragMoveEnabled

property 
dragMoveEnabled:Boolean

Language Version: ActionScript 3.0
Product Version: Flex 3
Runtime Versions: Flash Player 9, AIR 1.1

A flag that indicates whether items can be moved instead of just copied from the control as part of a drag-and-drop operation. If true, and the dragEnabled property is true, items can be moved. Often the data provider cannot or should not have items removed from it, so a MOVE operation should not be allowed during drag-and-drop.

The default value is false.



Implementation
    public function get dragMoveEnabled():Boolean
    public function set dragMoveEnabled(value:Boolean):void

dropEnabled

property 
dropEnabled:Boolean

Language Version: ActionScript 3.0
Product Version: Flex 3
Runtime Versions: Flash Player 9, AIR 1.1

A flag that indicates whether dragged items can be dropped onto the control.

If you set this property to true, the control accepts all data formats, and assumes that the dragged data matches the format of the data in the data provider. If you want to explicitly check the data format of the data being dragged, you must handle one or more of the drag events, such as dragOver, and call the DragEvent's preventDefault() method to customize the way the list class accepts dropped data.

When you set dropEnabled to true, Flex automatically calls the showDropFeedback() and hideDropFeedback() methods to display the drop indicator.

The default value is false.



Implementation
    public function get dropEnabled():Boolean
    public function set dropEnabled(value:Boolean):void

explicitColumnCount

property 
protected var explicitColumnCount:int = -1

Language Version: ActionScript 3.0
Product Version: Flex 3
Runtime Versions: Flash Player 9, AIR 1.1

The column count requested by explicitly setting the columnCount property.

explicitColumnWidth

property 
protected var explicitColumnWidth:Number

Language Version: ActionScript 3.0
Product Version: Flex 3
Runtime Versions: Flash Player 9, AIR 1.1

The column width requested by explicitly setting the columnWidth.

explicitRowCount

property 
protected var explicitRowCount:int = -1

Language Version: ActionScript 3.0
Product Version: Flex 3
Runtime Versions: Flash Player 9, AIR 1.1

The row count requested by explicitly setting rowCount.

explicitRowHeight

property 
protected var explicitRowHeight:Number

Language Version: ActionScript 3.0
Product Version: Flex 3
Runtime Versions: Flash Player 9, AIR 1.1

The row height requested by explicitly setting rowHeight.

factoryMap

property 
protected var factoryMap:Dictionary

Language Version: ActionScript 3.0
Product Version: Flex 3
Runtime Versions: Flash Player 9, AIR 1.1

A map of item renderers by factory. This property is a Dictionary indexed by itemRenderers where the values are IFactory.

freeItemRenderers

property 
protected var freeItemRenderers:Array

Language Version: ActionScript 3.0
Product Version: Flex 3
Runtime Versions: Flash Player 9, AIR 1.1

A stack of unused item renderers. Most list classes recycle renderers they've already created as they scroll out of the displayable area; doing so saves time during scrolling. The recycled renderers are stored here.

freeItemRenderersByFactory

property 
protected var freeItemRenderersByFactory:Dictionary

Language Version: ActionScript 3.0
Product Version: Flex 3
Runtime Versions: Flash Player 9, AIR 1.1

A map of free item renderers by factory. This property is a Dictionary indexed by factories where the values are Dictionaries of itemRenderers.

highlightIndicator

property 
protected var highlightIndicator:Sprite

Language Version: ActionScript 3.0
Product Version: Flex 3
Runtime Versions: Flash Player 9, AIR 1.1

The DisplayObject that contains the graphics that indicates which renderer is highlighted.

highlightItemRenderer

property 
protected var highlightItemRenderer:IListItemRenderer

Language Version: ActionScript 3.0
Product Version: Flex 3
Runtime Versions: Flash Player 9, AIR 1.1

The renderer that is currently rolled over or under the caret.

highlightUID

property 
protected var highlightUID:String

Language Version: ActionScript 3.0
Product Version: Flex 3
Runtime Versions: Flash Player 9, AIR 1.1

The UID of the item that is current rolled over or under the caret.

iconField

property 
iconField:String

Language Version: ActionScript 3.0
Product Version: Flex 3
Runtime Versions: Flash Player 9, AIR 1.1

The name of the field in the data provider object that determines what to display as the icon. By default, the list class does not try to display icons with the text in the rows. However, by specifying an icon field, you can specify a graphic that is created and displayed as an icon in the row. This property is ignored by DataGrid.

The renderers will look in the data provider object for a property of the name supplied as the iconField. If the value of the property is a Class, it will instantiate that class and expect it to be an instance of an IFlexDisplayObject. If the value of the property is a String, it will look to see if a Class exists with that name in the application, and if it can't find one, it will also look for a property on the document with that name and expect that property to map to a Class.

The default value is null.

This property can be used as the source for data binding. When this property is modified, it dispatches the iconFieldChanged event.



Implementation
    public function get iconField():String
    public function set iconField(value:String):void

iconFunction

property 
iconFunction:Function

Language Version: ActionScript 3.0
Product Version: Flex 3
Runtime Versions: Flash Player 9, AIR 1.1

A user-supplied function to run on each item to determine its icon. By default the list does not try to display icons with the text in the rows. However, by specifying an icon function, you can specify a Class for a graphic that will be created and displayed as an icon in the row. This property is ignored by DataGrid.

The iconFunction takes a single argument which is the item in the data provider and returns a Class, as the following example shows:

iconFunction(item:Object):Class

The default value is null.

This property can be used as the source for data binding. When this property is modified, it dispatches the iconFunctionChanged event.



Implementation
    public function get iconFunction():Function
    public function set iconFunction(value:Function):void

itemRenderer

property 
itemRenderer:IFactory

Language Version: ActionScript 3.0
Product Version: Flex 3
Runtime Versions: Flash Player 9, AIR 1.1

The custom item renderer for the control. You can specify a drop-in, inline, or custom item renderer.

The default item renderer depends on the component class. The TileList and HorizontalList class use TileListItemRenderer, The List class uses ListItemRenderer. The DataGrid class uses DataGridItemRenderer from DataGridColumn.



Implementation
    public function get itemRenderer():IFactory
    public function set itemRenderer(value:IFactory):void

See also

itemsNeedMeasurement

property 
protected var itemsNeedMeasurement:Boolean = true

Language Version: ActionScript 3.0
Product Version: Flex 3
Runtime Versions: Flash Player 9, AIR 1.1

A flag that indicates whether the columnWidth and rowHeight properties need to be calculated. This property is set if a style changes that can affect the measurements of the renderer, or if the data provider is changed.

itemsSizeChanged

property 
protected var itemsSizeChanged:Boolean = false

Language Version: ActionScript 3.0
Product Version: Flex 3
Runtime Versions: Flash Player 9, AIR 1.1

A flag that indicates that the size of the renderers may have changed. The component usually responds by re-applying the data items to all of the renderers on the next updateDisplayList() call. There is an assumption that re-applying the items will invalidate the item renderers and cause them to re-measure.

iterator

property 
protected var iterator:IViewCursor

Language Version: ActionScript 3.0
Product Version: Flex 3
Runtime Versions: Flash Player 9, AIR 1.1

The main IViewCursor used to fetch items from the data provider and pass the items to the renderers. At the end of any sequence of code, it must always be positioned at the topmost visible item being displayed.

iteratorValid

property 
protected var iteratorValid:Boolean = true

Language Version: ActionScript 3.0
Product Version: Flex 3
Runtime Versions: Flash Player 9, AIR 1.1

A flag that indicates that a page fault as occurred and that the iterator's position is not valid (not positioned at the topmost item being displayed). If the component gets a page fault (an ItemPending error), it sets iteratorValid to false. Code that normally handles the rendering of items checks this flag and does not run until the page of data comes in from the server.

keySelectionPending

property 
protected var keySelectionPending:Boolean = false

Language Version: ActionScript 3.0
Product Version: Flex 3
Runtime Versions: Flash Player 9, AIR 1.1

A flag that indicates if keyboard selection was interrupted by a page fault. The component responds by suspending the rendering of items until the page of data arrives. The finishKeySelection() method will be called when the paged data arrives.

labelField

property 
labelField:String

Language Version: ActionScript 3.0
Product Version: Flex 3
Runtime Versions: Flash Player 9, AIR 1.1

The name of the field in the data provider items to display as the label. By default the list looks for a property named label on each item and displays it. However, if the data objects do not contain a label property, you can set the labelField property to use a different property in the data object. An example would be "FullName" when viewing a set of people names fetched from a database.

The default value is "label".

This property can be used as the source for data binding. When this property is modified, it dispatches the labelFieldChanged event.



Implementation
    public function get labelField():String
    public function set labelField(value:String):void

labelFunction

property 
labelFunction:Function

Language Version: ActionScript 3.0
Product Version: Flex 3
Runtime Versions: Flash Player 9, AIR 1.1

A user-supplied function to run on each item to determine its label. By default, the list looks for a property named label on each data provider item and displays it. However, some data sets do not have a label property nor do they have another property that can be used for displaying. An example is a data set that has lastName and firstName fields but you want to display full names.

You can supply a labelFunction that finds the appropriate fields and returns a displayable string. The labelFunction is also good for handling formatting and localization.

For most components, the label function takes a single argument which is the item in the data provider and returns a String.

      myLabelFunction(item:Object):String

The method signature for the DataGrid and DataGridColumn classes is:

      myLabelFunction(item:Object, column:DataGridColumn):String

where item contains the DataGrid item object, and column specifies the DataGrid column.

The default value is null.

This property can be used as the source for data binding. When this property is modified, it dispatches the labelFunctionChanged event.



Implementation
    public function get labelFunction():Function
    public function set labelFunction(value:Function):void

lastDropIndex

property 
protected var lastDropIndex:int

Language Version: ActionScript 3.0
Product Version: Flex 3
Runtime Versions: Flash Player 9, AIR 1.1

The most recently calculated index where the drag item should be added to the drop target.

lastSeekPending

property 
protected var lastSeekPending:ListBaseSeekPending

Language Version: ActionScript 3.0
Product Version: Flex 3
Runtime Versions: Flash Player 9, AIR 1.1

The most recent seek that caused a page fault. If there are multiple page faults, only the most recent one is of interest, as that is where to position the iterator and start rendering rows again.

listContent

property 
protected var listContent:ListBaseContentHolder

Language Version: ActionScript 3.0
Product Version: Flex 3
Runtime Versions: Flash Player 9, AIR 1.1

An internal display object that parents all of the item renderers, selection and highlighting indicators and other supporting graphics. This is roughly equivalent to the contentPane in the Container class, and is used for managing scrolling.

listContentStyleFilters

property 
listContentStyleFilters:Object  [read-only]

Language Version: ActionScript 3.0
Product Version: Flex 3
Runtime Versions: Flash Player 9, AIR 1.1

The set of styles to pass from the ListBase to the listContent.



Implementation
    protected function get listContentStyleFilters():Object

See also

listData

property 
listData:BaseListData

Language Version: ActionScript 3.0
Product Version: Flex 3
Runtime Versions: Flash Player 9, AIR 1.1

When a component is used as a drop-in item renderer or drop-in item editor, Flex initializes the listData property of the component with the additional data from the list control. The component can then use the listData property and the data property to display the appropriate information as a drop-in item renderer or drop-in item editor.

You do not set this property in MXML or ActionScript; Flex sets it when the component is used as a drop-in item renderer or drop-in item editor.

This property can be used as the source for data binding. When this property is modified, it dispatches the dataChange event.



Implementation
    public function get listData():BaseListData
    public function set listData(value:BaseListData):void

See also

listItems

property 
listItems:Array  [read-only]

Language Version: ActionScript 3.0
Product Version: Flex 3
Runtime Versions: Flash Player 9, AIR 1.1

An Array of Arrays that contains the itemRenderer instances that render each data provider item. This is a two-dimensional row major array (array of rows that are arrays of columns).



Implementation
    protected function get listItems():Array

menuSelectionMode

property 
public var menuSelectionMode:Boolean = false

Language Version: ActionScript 3.0
Product Version: Flex 3
Runtime Versions: Flash Player 9, AIR 1.1

A flag that indicates whether menu-style selection should be used. In a Menu, dragging from one renderer into another selects the new one and un-selects the old.

modifiedCollectionView

property 
protected var modifiedCollectionView:ModifiedCollectionView

Language Version: ActionScript 3.0
Product Version: Flex 3
Runtime Versions: Flash Player 9, AIR 1.1

The collection view that temporarily preserves previous data provider state to facilitate running data change effects.

nullItemRenderer

property 
nullItemRenderer:IFactory

Language Version: ActionScript 3.0
Product Version: Flex 3
Runtime Versions: Flash Player 9, AIR 1.1

The custom item renderer for the control. You can specify a drop-in, inline, or custom item renderer.

The default item renderer depends on the component class. The TileList and HorizontalList class use TileListItemRenderer, The List class uses ListItemRenderer. The DataGrid class uses DataGridItemRenderer from DataGridColumn.



Implementation
    public function get nullItemRenderer():IFactory
    public function set nullItemRenderer(value:IFactory):void

offscreenExtraColumns

property 
protected var offscreenExtraColumns:int = 0

Language Version: ActionScript 3.0
Product Version: Flex 3
Runtime Versions: Flash Player 9, AIR 1.1

The target number of extra columns of item renderers used in the layout of the control. Half of these columns are created to the left of the visible onscreen columns; half are created to the right. Typically this property will be set indirectly when you set the offscreenExtraRowsOrColumns property.

The default value is 0.

offscreenExtraColumnsLeft

property 
protected var offscreenExtraColumnsLeft:int = 0

Language Version: ActionScript 3.0
Product Version: Flex 3
Runtime Versions: Flash Player 9, AIR 1.1

The number of offscreen columns currently to the left of the leftmost visible column. This value will be <= offscreenExtraColumns / 2.

The default value is 0.

offscreenExtraColumnsRight

property 
protected var offscreenExtraColumnsRight:int = 0

Language Version: ActionScript 3.0
Product Version: Flex 3
Runtime Versions: Flash Player 9, AIR 1.1

The number of offscreen columns currently to the right of the right visible column. This value will be <= offscreenExtraColumns / 2.

The default value is 0.

offscreenExtraRows

property 
protected var offscreenExtraRows:int = 0

Language Version: ActionScript 3.0
Product Version: Flex 3
Runtime Versions: Flash Player 9, AIR 1.1

The target number of extra rows of item renderers to be used in the layout of the control. Half of these rows are created above the visible onscreen rows; half are created below. Typically this property is set indirectly when you set the offscreenExtraRowsOrColumns property.

The default value is 0.

offscreenExtraRowsBottom

property 
protected var offscreenExtraRowsBottom:int = 0

Language Version: ActionScript 3.0
Product Version: Flex 3
Runtime Versions: Flash Player 9, AIR 1.1

The number of offscreen rows currently below the bottom visible item renderer. This value will be <= offscreenExtraRows / 2.

The default value is 0.

offscreenExtraRowsOrColumns

property 
offscreenExtraRowsOrColumns:int

Language Version: ActionScript 3.0
Product Version: Flex 3
Runtime Versions: Flash Player 9, AIR 1.1

The target number of extra rows or columns of item renderers to be used in the layout of the control. Half of these rows/columns are created above or to the left of the visible onscreen rows/columns; half are created below or to the right.

Whether rows or columns are created is dependent on the control and its properties. Generally rows will be used, except for TileBase components where direction is set to TileBaseDirection.VERTICAL. In that case, columns are created.

You set this property to a non-zero value primarily when applying data effects to the List or TileList controls. Changes that affect the data provider element corresponding to the currently visible items, or changes that affect the data provider element for the specified number of items before or after the visible items, trigger the data effect. Data provider elements outside this range may not be animated perfectly by the data effect.

This property is useful because data effects work by first determining a 'before' layout of the list-based control, then determining an 'after' layout, and finally setting the properties of the effect to create an animation from the before layout to the after layout. Since many effects cause currently invisible items to become visible, or currently visible items to become invisible, this property configures the control to create the offscreen item renderers so that they already exist when the data effect plays.

A reasonable value for this property might be the number of rows visible onscreen. Setting it to a very large value may cause performance problems when used with a data provider that contains a large number of elements.

The default value is 0.



Implementation
    public function get offscreenExtraRowsOrColumns():int
    public function set offscreenExtraRowsOrColumns(value:int):void

offscreenExtraRowsOrColumnsChanged

property 
protected var offscreenExtraRowsOrColumnsChanged:Boolean = false

Language Version: ActionScript 3.0
Product Version: Flex 3
Runtime Versions: Flash Player 9, AIR 1.1

A flag indicating that the number of offscreen rows or columns may have changed.

offscreenExtraRowsTop

property 
protected var offscreenExtraRowsTop:int = 0

Language Version: ActionScript 3.0
Product Version: Flex 3
Runtime Versions: Flash Player 9, AIR 1.1

The number of offscreen rows currently above the topmost visible row. This value will be <= offscreenExtraRows / 2. It is used when computing the relationship of listItems and rowInfo Arrays to items in the data provider (in conjunction with verticalScrollPosition property).

The default value is 0.

rendererChanged

property 
protected var rendererChanged:Boolean = false

Language Version: ActionScript 3.0
Product Version: Flex 3
Runtime Versions: Flash Player 9, AIR 1.1

A flag that indicates that the renderer changed. The component usually responds by destroying all existing renderers and redrawing all of the renderers on the next updateDisplayList() call.

reservedItemRenderers

property 
protected var reservedItemRenderers:Object

Language Version: ActionScript 3.0
Product Version: Flex 3
Runtime Versions: Flash Player 9, AIR 1.1

A hash map of currently unused item renderers that may be used again in the near future. Used when running data effects. The map is indexed by the data provider item's UID.

rowCount

property 
rowCount:int

Language Version: ActionScript 3.0
Product Version: Flex 3
Runtime Versions: Flash Player 9, AIR 1.1

Number of rows to be displayed. If the height of the component has been explicitly set, this property might not have any effect.

For a DataGrid control, the rowCount property includes the header row. So, for a DataGrid control with 3 body rows and a header row, the rowCount property is 4.

The default value is 4.



Implementation
    public function get rowCount():int
    public function set rowCount(value:int):void

rowHeight

property 
rowHeight:Number

Language Version: ActionScript 3.0
Product Version: Flex 3
Runtime Versions: Flash Player 9, AIR 1.1

The height of the rows in pixels. Unless the variableRowHeight property is true, all rows are the same height. If not specified, the row height is based on the font size and other properties of the renderer.



Implementation
    public function get rowHeight():Number
    public function set rowHeight(value:Number):void

rowInfo

property 
rowInfo:Array  [read-only]

Language Version: ActionScript 3.0
Product Version: Flex 3
Runtime Versions: Flash Player 9, AIR 1.1

An array of ListRowInfo objects that cache row heights and other tracking information for the rows in listItems.



Implementation
    protected function get rowInfo():Array

rowMap

property 
protected var rowMap:Object

Language Version: ActionScript 3.0
Product Version: Flex 3
Runtime Versions: Flash Player 9, AIR 1.1

A hash map of item renderers to their respective ListRowInfo object. The ListRowInfo object is indexed by the DisplayObject name of the item renderer.

runDataEffectNextUpdate

property 
protected var runDataEffectNextUpdate:Boolean = false

Language Version: ActionScript 3.0
Product Version: Flex 3
Runtime Versions: Flash Player 9, AIR 1.1

A flag that indicates if a data effect should be initiated the next time the display is updated.

runningDataEffect

property 
protected var runningDataEffect:Boolean = false

Language Version: ActionScript 3.0
Product Version: Flex 3
Runtime Versions: Flash Player 9, AIR 1.1

A flag indicating if a data change effect is currently running.

selectable

property 
selectable:Boolean

Language Version: ActionScript 3.0
Product Version: Flex 3
Runtime Versions: Flash Player 9, AIR 1.1

A flag that indicates whether the list shows selected items as selected. If true, the control supports selection. The Menu class, which subclasses ListBase, sets this property to false by default, because it doesn't show the chosen menu item as selected.

The default value is true.



Implementation
    public function get selectable():Boolean
    public function set selectable(value:Boolean):void

selectedData

property 
protected var selectedData:Object

Language Version: ActionScript 3.0
Product Version: Flex 3
Runtime Versions: Flash Player 9, AIR 1.1

A hash table of ListBaseSelectionData objects that track which items are currently selected. The table is indexed by the UID of the items.

See also

selectedIndex

property 
selectedIndex:int

Language Version: ActionScript 3.0
Product Version: Flex 3
Runtime Versions: Flash Player 9, AIR 1.1

The index in the data provider of the selected item.

The default value is -1 (no selected item).

This property can be used as the source for data binding. When this property is modified, it dispatches the valueCommit event.



Implementation
    public function get selectedIndex():int
    public function set selectedIndex(value:int):void

selectedIndices

property 
selectedIndices:Array

Language Version: ActionScript 3.0
Product Version: Flex 3
Runtime Versions: Flash Player 9, AIR 1.1

An array of indices in the data provider of the selected items. The items are in the reverse order that the user selected the items.

The default value is [ ].

This property can be used as the source for data binding. When this property is modified, it dispatches the valueCommit event.



Implementation
    public function get selectedIndices():Array
    public function set selectedIndices(value:Array):void

selectedItem

property 
selectedItem:Object

Language Version: ActionScript 3.0
Product Version: Flex 3
Runtime Versions: Flash Player 9, AIR 1.1

A reference to the selected item in the data provider.

The default value is null.

This property can be used as the source for data binding. When this property is modified, it dispatches the valueCommit event.



Implementation
    public function get selectedItem():Object
    public function set selectedItem(value:Object):void

selectedItems

property 
selectedItems:Array

Language Version: ActionScript 3.0
Product Version: Flex 3
Runtime Versions: Flash Player 9, AIR 1.1

An array of references to the selected items in the data provider. The items are in the reverse order that the user selected the items.

The default value is [ ].

This property can be used as the source for data binding. When this property is modified, it dispatches the valueCommit event.



Implementation
    public function get selectedItems():Array
    public function set selectedItems(value:Array):void

selectedItemsCompareFunction

property 
selectedItemsCompareFunction:Function

Language Version: ActionScript 3.0
Product Version: Flex 4
Runtime Versions: Flash Player 9, AIR 1.5

A function used to compare items in the selectedItems property against items in the data provider. If there is a match, the item in the data provider becomes part of the selection. By default, or if selectedItemsCompareFunction is set to null, the default comparision function is used, which uses strict equality (===). Note that earlier releases of Flex used simple equality (==) so there could be behavioral differences in certain cases. A common compare function might simply compare UIDs of objects or test that a particular property matches.

The compare function takes two arguments. The first argument is the object in the data provider. The second argument is an object in selectedItems property. The function returns true if the data provider item should be selected.

      myCompareFunction(itemInDataProvider:Object, itemInSelectedItems):Boolean

The default value is null, which uses strict equality.

This property can be used as the source for data binding. When this property is modified, it dispatches the selectedItemsCompareFunctionChanged event.



Implementation
    public function get selectedItemsCompareFunction():Function
    public function set selectedItemsCompareFunction(value:Function):void

selectionIndicators

property 
protected var selectionIndicators:Object

Language Version: ActionScript 3.0
Product Version: Flex 3
Runtime Versions: Flash Player 9, AIR 1.1

A hash table of selection indicators. This table allows the component to quickly find and remove the indicators when the set of selected items is cleared. The table is indexed by the item's UID.

selectionLayer

property 
protected var selectionLayer:Sprite

Language Version: ActionScript 3.0
Product Version: Flex 3
Runtime Versions: Flash Player 9, AIR 1.1

The layer in listContent where all selection and highlight indicators are drawn.

selectionTweens

property 
protected var selectionTweens:Object

Language Version: ActionScript 3.0
Product Version: Flex 3
Runtime Versions: Flash Player 9, AIR 1.1

A hash table of selection tweens. This allows the component to quickly find and clean up any tweens in progress if the set of selected items is cleared. The table is indexed by the item's UID.

showCaret

property 
protected var showCaret:Boolean

Language Version: ActionScript 3.0
Product Version: Flex 3
Runtime Versions: Flash Player 9, AIR 1.1

A flag that indicates whether to show caret. This property is usually set to false when mouse activity is detected and set back to true when the keyboard is used for selection.

showDataTips

property 
showDataTips:Boolean

Language Version: ActionScript 3.0
Product Version: Flex 3
Runtime Versions: Flash Player 9, AIR 1.1

A flag that indicates whether dataTips are displayed for text in the rows. If true, dataTips are displayed. DataTips are tooltips designed to show the text that is too long for the row. If you set a dataTipFunction, dataTips are shown regardless of whether the text is too long for the row.

The default value is false.

This property can be used as the source for data binding. When this property is modified, it dispatches the showDataTipsChanged event.



Implementation
    public function get showDataTips():Boolean
    public function set showDataTips(value:Boolean):void

unconstrainedRenderers

property 
protected var unconstrainedRenderers:Dictionary

Language Version: ActionScript 3.0
Product Version: Flex 3
Runtime Versions: Flash Player 9, AIR 1.1

A hash map of item renderers that are not subject to the layout algorithms of the list.

value

property 
value:Object  [read-only]

Language Version: ActionScript 3.0
Product Version: Flex 3
Runtime Versions: Flash Player 9, AIR 1.1

The selected item, or the data or label field of the selected item. If the selected item is a Number or String the value is the item. If the item is an object, the value is the data property if it exists, or the label property if it exists.

Note: Using selectedItem is often preferable. This property exists for backward compatibility with older applications.

This property can be used as the source for data binding. When this property is modified, it dispatches the valueCommit event.



Implementation
    public function get value():Object

variableRowHeight

property 
variableRowHeight:Boolean

Language Version: ActionScript 3.0
Product Version: Flex 3
Runtime Versions: Flash Player 9, AIR 1.1

A flag that indicates whether the individual rows can have different height. This property is ignored by TileList and HorizontalList. If true, individual rows can have different height values.

The default value is false.



Implementation
    public function get variableRowHeight():Boolean
    public function set variableRowHeight(value:Boolean):void

visibleData

property 
visibleData:Object  [read-only]

Language Version: ActionScript 3.0
Product Version: Flex 3
Runtime Versions: Flash Player 9, AIR 1.1

A hash table of data provider item renderers currently in view. The table is indexed by the data provider item's UID and is used to quickly get the renderer used to display a particular item.



Implementation
    protected function get visibleData():Object

wordWrap

property 
wordWrap:Boolean

Language Version: ActionScript 3.0
Product Version: Flex 3
Runtime Versions: Flash Player 9, AIR 1.1

A flag that indicates whether text in the row should be word wrapped. If true, enables word wrapping for text in the rows. Only takes effect if the variableRowHeight property is also true.

The default value is false.



Implementation
    public function get wordWrap():Boolean
    public function set wordWrap(value:Boolean):void

wordWrapChanged

property 
protected var wordWrapChanged:Boolean = false

Language Version: ActionScript 3.0
Product Version: Flex 3
Runtime Versions: Flash Player 9, AIR 1.1

A flag that indicates whether the value of the wordWrap property has changed since the last time the display list was updated. This property is set when you change the wordWrap property value, and is reset to false by the updateDisplayList() method. The component usually responds by re-applying the data items to all of the renderers on the next updateDisplayList() call. This is different from itemsSizeChanged because it further indicates that re-applying the data items to the renderers may not invalidate them since the only thing that changed was whether or not the renderer should factor in wordWrap into its size calculations.

Constructor Detail

ListBase

()Constructor
public function ListBase()

Language Version: ActionScript 3.0
Product Version: Flex 3
Runtime Versions: Flash Player 9, AIR 1.1

Constructor.

Method Detail

addDataEffectItem

()method
public function addDataEffectItem(item:Object):void

Language Version: ActionScript 3.0
Product Version: Flex 3
Runtime Versions: Flash Player 9, AIR 1.1

Adds an item renderer if a data change effect is running. The item renderer should correspond to a recently added data item in the data provider's collection that isn't yet being displayed.

This function will be called by an AddItemAction effect as part of a data change effect to specify the point at which a data item added to a collection begins to be displayed by the control using an item renderer.

Parameters

item:Object — The item renderer to add to the control's layout.

addDragData

()method 
protected function addDragData(dragSource:Object):void

Language Version: ActionScript 3.0
Product Version: Flex 3
Runtime Versions: Flash Player 9, AIR 1.1

Adds the selected items to the DragSource object as part of a drag-and-drop operation. Override this method to add other data to the drag source.

Parameters

dragSource:Object — The DragSource object to which to add the data.

addToFreeItemRenderers

()method 
protected function addToFreeItemRenderers(item:IListItemRenderer):void

Language Version: ActionScript 3.0
Product Version: Flex 3
Runtime Versions: Flash Player 9, AIR 1.1

Adds a renderer to the recycled renderer list, making it invisible and cleaning up references to it. If a data effect is running, the renderer is reserved for future use for that data. Otherwise it is added to the general freeItemRenderers stack.

Parameters

item:IListItemRenderer — The renderer to add.

addToRowArrays

()method 
protected function addToRowArrays():void

Language Version: ActionScript 3.0
Product Version: Flex 3
Runtime Versions: Flash Player 9, AIR 1.1

Add a blank row to the beginning of the arrays that store references to the rows.

adjustListContent

()method 
protected function adjustListContent(unscaledWidth:Number = -1, unscaledHeight:Number = -1):void

Language Version: ActionScript 3.0
Product Version: Flex 3
Runtime Versions: Flash Player 9, AIR 1.1

Called from the updateDisplayList() method to adjust the size and position of listContent.

Parameters

unscaledWidth:Number (default = -1)
 
unscaledHeight:Number (default = -1)

applySelectionEffect

()method 
protected function applySelectionEffect(indicator:Sprite, uid:String, itemRenderer:IListItemRenderer):void

Language Version: ActionScript 3.0
Product Version: Flex 3
Runtime Versions: Flash Player 9, AIR 1.1

Sets up the effect for applying the selection indicator. The default is a basic alpha tween.

Parameters

indicator:Sprite — A Sprite that contains the graphics depicting selection.
 
uid:String — The UID of the item being selected which can be used to index into a table and track more than one selection effect.
 
itemRenderer:IListItemRenderer — The item renderer that is being shown as selected.

calculateDropIndex

()method 
public function calculateDropIndex(event:DragEvent = null):int

Language Version: ActionScript 3.0
Product Version: Flex 3
Runtime Versions: Flash Player 9, AIR 1.1

Returns the index where the dropped items should be added to the drop target.

Parameters

event:DragEvent (default = null) — A DragEvent that contains information about the position of the mouse. If null the method should return the dropIndex value from the last valid event.

Returns
int — Index where the dropped items should be added.

calculateDropIndicatorY

()method 
protected function calculateDropIndicatorY(rowCount:Number, rowNum:int):Number

Language Version: ActionScript 3.0
Product Version: Flex 3
Runtime Versions: Flash Player 9, AIR 1.1

Calculates the y position of the drop indicator when performing a drag-and-drop operation.

Parameters

rowCount:Number — The number of visible rows in the control.
 
rowNum:int — The row number in the control where the drop indicator should appear.

Returns
Number — The y axis coordinate of the drop indicator.

clearCaretIndicator

()method 
protected function clearCaretIndicator(indicator:Sprite, itemRenderer:IListItemRenderer):void

Language Version: ActionScript 3.0
Product Version: Flex 3
Runtime Versions: Flash Player 9, AIR 1.1

Clears the caret indicator into the given Sprite.

Parameters

indicator:Sprite — A Sprite that should contain the graphics for that make a renderer look highlighted.
 
itemRenderer:IListItemRenderer — The item renderer that is being highlighted.

clearHighlightIndicator

()method 
protected function clearHighlightIndicator(indicator:Sprite, itemRenderer:IListItemRenderer):void

Language Version: ActionScript 3.0
Product Version: Flex 3
Runtime Versions: Flash Player 9, AIR 1.1

Clears the highlight indicator in the given Sprite.

Parameters

indicator:Sprite — A Sprite that should contain the graphics for that make a renderer look highlighted.
 
itemRenderer:IListItemRenderer — The item renderer that is being highlighted.

clearIndicators

()method 
protected function clearIndicators():void

Language Version: ActionScript 3.0
Product Version: Flex 3
Runtime Versions: Flash Player 9, AIR 1.1

Removes all selection and highlight and caret indicators.

clearSelected

()method 
protected function clearSelected(transition:Boolean = false):void

Language Version: ActionScript 3.0
Product Version: Flex 3
Runtime Versions: Flash Player 9, AIR 1.1

Clears the set of selected items and removes all graphics depicting the selected state of those items.

Parameters

transition:Boolean (default = false)true if the graphics should have a fadeout effect.

clearVisibleData

()method 
protected function clearVisibleData():void

Language Version: ActionScript 3.0
Product Version: Flex 3
Runtime Versions: Flash Player 9, AIR 1.1

Empty the visibleData hash table.

collectionChangeHandler

()method 
protected function collectionChangeHandler(event:Event):void

Language Version: ActionScript 3.0
Product Version: Flex 3
Runtime Versions: Flash Player 9, AIR 1.1

Handles CollectionEvents dispatched from the data provider as the data changes. Updates the renderers, selected indices and scrollbars as needed.

Parameters

event:Event — The CollectionEvent.

commitProperties

()method 
override protected function commitProperties():void

Language Version: ActionScript 3.0
Product Version: Flex 3
Runtime Versions: Flash Player 9, AIR 1.1

Calculates the column width and row height and number of rows and columns based on whether properties like columnCount columnWidth, rowHeight and rowCount were explicitly set.

See also

configureScrollBars

()method 
protected function configureScrollBars():void

Language Version: ActionScript 3.0
Product Version: Flex 3
Runtime Versions: Flash Player 9, AIR 1.1

Configures the ScrollBars based on the number of rows and columns and viewable rows and columns. This method is called from the updateDisplayList() method after the rows and columns have been updated. The method should figures out what parameters to pass into the setScrollBarProperties() method to properly set up the ScrollBars.

copyItemWithUID

()method 
protected function copyItemWithUID(item:Object):Object

Language Version: ActionScript 3.0
Product Version: Flex 3
Runtime Versions: Flash Player 9, AIR 1.1

Makes a deep copy of the object by calling the ObjectUtil.copy() method, and replaces the copy's uid property (if present) with a new value by calling the UIDUtil.createUID() method.

This method is used for a drag and drop copy.

Parameters

item:Object — The item to copy.

Returns
Object — The copy of the object.

See also

copySelectedItems

()method 
protected function copySelectedItems(useDataField:Boolean = true):Array

Language Version: ActionScript 3.0
Product Version: Flex 3
Runtime Versions: Flash Player 9, AIR 1.1

Copies the selected items in the order that they were selected.

Parameters

useDataField:Boolean (default = true)true if the array should be filled with the actual items or false if the array should be filled with the indexes of the items.

Returns
Array — An array of selected items.

createChildren

()method 
override protected function createChildren():void

Language Version: ActionScript 3.0
Product Version: Flex 3
Runtime Versions: Flash Player 9, AIR 1.1

Creates objects that are children of this ListBase; in this case, the listContent object that will hold all the item renderers. The item renderers are not created immediately, but later when the updateDisplayList() method is called.

createItemRenderer

()method 
public function createItemRenderer(data:Object):IListItemRenderer

Language Version: ActionScript 3.0
Product Version: Flex 3
Runtime Versions: Flash Player 9, AIR 1.1

Creates an item renderer given the data object.

Parameters

data:Object — data object.

Returns
IListItemRenderer — The item renderer.

destroyRow

()method 
protected function destroyRow(i:int, numCols:int):void

Language Version: ActionScript 3.0
Product Version: Flex 3
Runtime Versions: Flash Player 9, AIR 1.1

Recycle a row that is no longer needed, and remove its indicators.

Parameters

i:int — The index of the row to remove.
 
numCols:int — The number of columns in the row.

dragCompleteHandler

()method 
protected function dragCompleteHandler(event:DragEvent):void

Language Version: ActionScript 3.0
Product Version: Flex 3
Runtime Versions: Flash Player 9, AIR 1.1

Handles DragEvent.DRAG_COMPLETE events. This method removes the item from the data provider.

Parameters

event:DragEvent — The DragEvent object.

dragDropHandler

()method 
protected function dragDropHandler(event:DragEvent):void

Language Version: ActionScript 3.0
Product Version: Flex 3
Runtime Versions: Flash Player 9, AIR 1.1

Handles DragEvent.DRAG_DROP events. This method hides the drop feedback by calling the hideDropFeedback() method.

If the action is a COPY, then this method makes a deep copy of the object by calling the ObjectUtil.copy() method, and replaces the copy's uid property (if present) with a new value by calling the UIDUtil.createUID() method.

Parameters

event:DragEvent — The DragEvent object.

See also

dragEnterHandler

()method 
protected function dragEnterHandler(event:DragEvent):void

Language Version: ActionScript 3.0
Product Version: Flex 3
Runtime Versions: Flash Player 9, AIR 1.1

Handles DragEvent.DRAG_ENTER events. This method determines if the DragSource object contains valid elements and uses the showDropFeedback() method to set up the UI feedback.

Parameters

event:DragEvent — The DragEvent object.

dragExitHandler

()method 
protected function dragExitHandler(event:DragEvent):void

Language Version: ActionScript 3.0
Product Version: Flex 3
Runtime Versions: Flash Player 9, AIR 1.1

Handles DragEvent.DRAG_EXIT events. This method hides the UI feeback by calling the hideDropFeedback() method.

Parameters

event:DragEvent — The DragEvent object.

dragOverHandler

()method 
protected function dragOverHandler(event:DragEvent):void

Language Version: ActionScript 3.0
Product Version: Flex 3
Runtime Versions: Flash Player 9, AIR 1.1

Handles DragEvent.DRAG_OVER events. This method determines if the DragSource object contains valid elements and uses the showDropFeedback() method to set up the UI feeback.

Parameters

event:DragEvent — The DragEvent object.

dragScroll

()method 
protected function dragScroll():void

Language Version: ActionScript 3.0
Product Version: Flex 3
Runtime Versions: Flash Player 9, AIR 1.1

Interval function that scrolls the list up or down if the mouse goes above or below the list.

dragStartHandler

()method 
protected function dragStartHandler(event:DragEvent):void

Language Version: ActionScript 3.0
Product Version: Flex 3
Runtime Versions: Flash Player 9, AIR 1.1

The default handler for the dragStart event.

Parameters

event:DragEvent — The DragEvent object.

drawCaretIndicator

()method 
protected function drawCaretIndicator(indicator:Sprite, x:Number, y:Number, width:Number, height:Number, color:uint, itemRenderer:IListItemRenderer):void

Language Version: ActionScript 3.0
Product Version: Flex 3
Runtime Versions: Flash Player 9, AIR 1.1

Draws the caret indicator into the given Sprite at the position, width and height specified using the color specified.

Parameters

indicator:Sprite — A Sprite that should contain the graphics for that make a renderer look highlighted.
 
x:Number — The suggested x position for the indicator.
 
y:Number — The suggested y position for the indicator.
 
width:Number — The suggested width for the indicator.
 
height:Number — The suggested height for the indicator.
 
color:uint — The suggested color for the indicator.
 
itemRenderer:IListItemRenderer — The item renderer that is being highlighted.

drawHighlightIndicator

()method 
protected function drawHighlightIndicator(indicator:Sprite, x:Number, y:Number, width:Number, height:Number, color:uint, itemRenderer:IListItemRenderer):void

Language Version: ActionScript 3.0
Product Version: Flex 3
Runtime Versions: Flash Player 9, AIR 1.1

Draws the highlight indicator into the given Sprite at the position, width and height specified using the color specified.

Parameters

indicator:Sprite — A Sprite that should contain the graphics for that make a renderer look highlighted.
 
x:Number — The suggested x position for the indicator.
 
y:Number — The suggested y position for the indicator.
 
width:Number — The suggested width for the indicator.
 
height:Number — The suggested height for the indicator.
 
color:uint — The suggested color for the indicator.
 
itemRenderer:IListItemRenderer — The item renderer that is being highlighted.

drawItem

()method 
protected function drawItem(item:IListItemRenderer, selected:Boolean = false, highlighted:Boolean = false, caret:Boolean = false, transition:Boolean = false):void

Language Version: ActionScript 3.0
Product Version: Flex 3
Runtime Versions: Flash Player 9, AIR 1.1

Draws the renderer with indicators that it is highlighted, selected, or the caret.

Parameters

item:IListItemRenderer — The renderer.
 
selected:Boolean (default = false)true if the renderer should be drawn in its selected state.
 
highlighted:Boolean (default = false)true if the renderer should be drawn in its highlighted state.
 
caret:Boolean (default = false)true if the renderer should be drawn as if it is the selection caret.
 
transition:Boolean (default = false)true if the selection state should fade in via an effect.

drawRowBackgrounds

()method 
protected function drawRowBackgrounds():void

Language Version: ActionScript 3.0
Product Version: Flex 3
Runtime Versions: Flash Player 9, AIR 1.1

Draws any alternating row colors, borders and backgrounds for the rows.

drawSelectionIndicator

()method 
protected function drawSelectionIndicator(indicator:Sprite, x:Number, y:Number, width:Number, height:Number, color:uint, itemRenderer:IListItemRenderer):void

Language Version: ActionScript 3.0
Product Version: Flex 3
Runtime Versions: Flash Player 9, AIR 1.1

Draws the selection indicator into the given Sprite at the position, width and height specified using the color specified.

Parameters

indicator:Sprite — A Sprite that should contain the graphics for that make a renderer look highlighted.
 
x:Number — The suggested x position for the indicator.
 
y:Number — The suggested y position for the indicator.
 
width:Number — The suggested width for the indicator.
 
height:Number — The suggested height for the indicator.
 
color:uint — The suggested color for the indicator.
 
itemRenderer:IListItemRenderer — The item renderer that is being highlighted.

findKey

()method 
protected function findKey(eventCode:int):Boolean

Language Version: ActionScript 3.0
Product Version: Flex 3
Runtime Versions: Flash Player 9, AIR 1.1

Tries to find the next item in the data provider that starts with the character in the eventCode parameter. You can override this to do fancier typeahead lookups. The search starts at the selectedIndex location; if it reaches the end of the data provider it starts over from the beginning.

Parameters

eventCode:int — The key that was pressed on the keyboard.

Returns
Booleantrue if a match was found.

findString

()method 
public function findString(str:String):Boolean

Language Version: ActionScript 3.0
Product Version: Flex 3
Runtime Versions: Flash Player 9, AIR 1.1

Finds an item in the list based on a String, and moves the selection to it. The search starts at the selectedIndex location; if it reaches the end of the data provider it starts over from the beginning.

For a DataGrid control, by default this method searches the first column in the control. To search a different column, set the sort property of the collection used to populate the control to the specific field or fields that you want to search. Each field corresponds to a single column of the control.

Parameters

str:String — The String to match.

Returns
Booleantrue if a match is found.

See also

finishDataChangeEffect

()method 
protected function finishDataChangeEffect(event:EffectEvent):void

Language Version: ActionScript 3.0
Product Version: Flex 3
Runtime Versions: Flash Player 9, AIR 1.1

Cleans up after a data change effect has finished running by restoring the original collection and iterator and removing any cached values used by the effect. This method is called by the Flex framework; you do not need to call it from your code.

Parameters

event:EffectEvent — The EffectEvent.

finishKeySelection

()method 
protected function finishKeySelection():void

Language Version: ActionScript 3.0
Product Version: Flex 3
Runtime Versions: Flash Player 9, AIR 1.1

Sets selected items based on the caretIndex and anchorIndex properties. Called by the keyboard selection handlers and by the updateDisplayList() method in case the keyboard selection handler received a page fault while scrolling to get more items.

getItemRendererFactory

()method 
public function getItemRendererFactory(data:Object):IFactory

Language Version: ActionScript 3.0
Product Version: Flex 3
Runtime Versions: Flash Player 9, AIR 1.1

Return the appropriate factory, using the default factory if none specified.

Parameters

data:Object — The data to be presented by the item renderer.

Returns
IFactory — if data is null, the default item renderer, otherwise it returns the custom item renderer.

getRendererSemanticValue

()method 
public function getRendererSemanticValue(target:Object, semanticProperty:String):Object

Language Version: ActionScript 3.0
Product Version: Flex 3
Runtime Versions: Flash Player 9, AIR 1.1

Returns true or false to indicates whether the effect should play on the target. The EffectTargetFilter class calls this method when you set the filter property on a data effect. For example, you set filter property to addItem or removeItem.

Parameters

target:Object — An item renderer
 
semanticProperty:String — The semantic property of the renderer whose value will be returned.

Returns
Objecttrue or false to indicates whether the effect should play on the target.

getReservedOrFreeItemRenderer

()method 
protected function getReservedOrFreeItemRenderer(data:Object):IListItemRenderer

Language Version: ActionScript 3.0
Product Version: Flex 3
Runtime Versions: Flash Player 9, AIR 1.1

Retrieves an already-created item renderer not currently in use. If a data effect is running, it first tries to retrieve from the reservedItemRenderers map. Otherwise (or if no reserved renderer is found) it retrieves from the freeItemRenderers stack.

Parameters

data:Object — The data to be presented by the item renderer.

Returns
IListItemRenderer

hideDropFeedback

()method 
public function hideDropFeedback(event:DragEvent):void

Language Version: ActionScript 3.0
Product Version: Flex 3
Runtime Versions: Flash Player 9, AIR 1.1

Hides the drop indicator under the mouse pointer that indicates that a drag and drop operation is allowed.

Parameters

event:DragEvent — A DragEvent object that contains information about the mouse location.

indexToColumn

()method 
protected function indexToColumn(index:int):int

Language Version: ActionScript 3.0
Product Version: Flex 3
Runtime Versions: Flash Player 9, AIR 1.1

The column for the data provider item at the given index.

Parameters

index:int — The offset into the data provider.

Returns
int — The column the item would be displayed at in the component; -1 if not displayable in listContent container.

indexToItemRenderer

()method 
public function indexToItemRenderer(index:int):IListItemRenderer

Language Version: ActionScript 3.0
Product Version: Flex 3
Runtime Versions: Flash Player 9, AIR 1.1

Get an item renderer for the index of an item in the data provider, if one exists. Because item renderers only exist for items within the set of viewable rows, you cannot use this method for items that are not visible.

Parameters

index:int — The offset into the data provider for an item.

Returns
IListItemRenderer — The item renderer that is displaying the item, or null if the item is not currently displayed.

indexToRow

()method 
protected function indexToRow(index:int):int

Language Version: ActionScript 3.0
Product Version: Flex 3
Runtime Versions: Flash Player 9, AIR 1.1

The row for the data provider item at the given index.

Parameters

index:int — The offset into the data provider.

Returns
int — The row the item would be displayed at in the component; -1 if not displayable in listContent container.

indicesToIndex

()method 
public function indicesToIndex(rowIndex:int, colIndex:int):int

Language Version: ActionScript 3.0
Product Version: Flex 3
Runtime Versions: Flash Player 9, AIR 1.1

Computes the offset into the data provider of the item at colIndex, rowIndex. The 9th row 3rd column in a TileList could be different items in the data provider based on the direction the tiles are laid out and the number of rows and columns in the TileList.

Parameters

rowIndex:int — The 0-based index of the row, including rows scrolled off the top. Thus, if verticalScrollPosition is 2 then the first visible row has a rowIndex of 2.
 
colIndex:int — The 0-based index of the column, including columns scrolled off the left. If horizontalScrollPosition is 2 then the first column on the left has a columnIndex of 2.

Returns
int — The offset into the data provider.

initiateDataChangeEffect

()method 
protected function initiateDataChangeEffect(unscaledWidth:Number, unscaledHeight:Number):void

Language Version: ActionScript 3.0
Product Version: Flex 3
Runtime Versions: Flash Player 9, AIR 1.1

Initiates a data change effect when there have been changes in the data provider.

Parameters

unscaledWidth:Number — The width of the control before external sizings are applied.
 
unscaledHeight:Number — The height of the control before external sizings are applied.

invalidateList

()method 
public function invalidateList():void

Language Version: ActionScript 3.0
Product Version: Flex 3
Runtime Versions: Flash Player 9, AIR 1.1

Refresh all rows on the next update.

isItemHighlighted

()method 
public function isItemHighlighted(data:Object):Boolean

Language Version: ActionScript 3.0
Product Version: Flex 3
Runtime Versions: Flash Player 9, AIR 1.1

Determines if the item renderer for a data provider item is highlighted (is rolled over via the mouse or under the caret due to keyboard navigation).

Parameters

data:Object — The data provider item.

Returns
Booleantrue if the item is highlighted.

isItemSelectable

()method 
public function isItemSelectable(data:Object):Boolean

Language Version: ActionScript 3.0
Product Version: Flex 3
Runtime Versions: Flash Player 9, AIR 1.1

Determines if the item renderer for a data provider item is selectable.

Parameters

data:Object — The data provider item.

Returns
Booleantrue if the item is selectable.

isItemSelected

()method 
public function isItemSelected(data:Object):Boolean

Language Version: ActionScript 3.0
Product Version: Flex 3
Runtime Versions: Flash Player 9, AIR 1.1

Determines if the item renderer for a data provider item is selected.

Parameters

data:Object — The data provider item.

Returns
Booleantrue if the item is selected.

isItemShowingCaret

()method 
public function isItemShowingCaret(data:Object):Boolean

Language Version: ActionScript 3.0
Product Version: Flex 3
Runtime Versions: Flash Player 9, AIR 1.1

Determines if the item renderer for a data provider item is the item under the caret due to keyboard navigation.

Parameters

data:Object — The data provider item.

Returns
Booleantrue if the item under the caret

isItemVisible

()method 
public function isItemVisible(item:Object):Boolean

Language Version: ActionScript 3.0
Product Version: Flex 3
Runtime Versions: Flash Player 9, AIR 1.1

Determines if an item is being displayed by a renderer.

Parameters

item:Object — A data provider item.

Returns
Booleantrue if the item is being displayed.

isRendererUnconstrained

()method 
protected function isRendererUnconstrained(item:Object):Boolean

Language Version: ActionScript 3.0
Product Version: Flex 3
Runtime Versions: Flash Player 9, AIR 1.1

Returns true if an item renderer is no longer being positioned by the list's layout algorithm while a data change effect is running as a result of a call to the unconstrainRenderer() method.

Parameters

item:Object — An item renderer.

Returns
Booleantrue if an item renderer is no longer being positioned by the list's layout algorithm.

itemRendererContains

()method 
public function itemRendererContains(renderer:IListItemRenderer, object:DisplayObject):Boolean

Language Version: ActionScript 3.0
Product Version: Flex 3
Runtime Versions: Flash Player 9, AIR 1.1

Determines whether a renderer contains (or owns) a display object. Ownership means that the display object isn't actually parented by the renderer but is associated with it in some way. Popups should be owned by the renderers so that activity in the popup is associated with the renderer and not seen as activity in another component.

Parameters

renderer:IListItemRenderer — The renderer that might contain or own the display object.
 
object:DisplayObject — The display object that might be associated with the renderer.

Returns
Booleantrue if the display object is contained or owned by the renderer.

itemRendererToIndex

()method 
public function itemRendererToIndex(itemRenderer:IListItemRenderer):int

Language Version: ActionScript 3.0
Product Version: Flex 3
Runtime Versions: Flash Player 9, AIR 1.1

Returns the index of the item in the data provider of the item being rendered by this item renderer. Because item renderers only exist for items that are within the set of viewable rows, you cannot use this method for items that are not visible.

Parameters

itemRenderer:IListItemRenderer — The item renderer that is displaying the item for which you want to know the data provider index.

Returns
int — The index of the item in the data provider.

itemRendererToIndices

()method 
protected function itemRendererToIndices(item:IListItemRenderer):Point

Language Version: ActionScript 3.0
Product Version: Flex 3
Runtime Versions: Flash Player 9, AIR 1.1

Returns a Point containing the columnIndex and rowIndex of an item renderer. Because item renderers are only created for items within the set of viewable rows, you cannot use this method to get the indices for items that are not visible. Also note that item renderers are recycled so the indices you get for an item may change if that item renderer is reused to display a different item. Usually, this method is called during mouse and keyboard handling when the set of data displayed by the item renderers hasn't yet changed.

Parameters

item:IListItemRenderer — An item renderer.

Returns
Point — A Point. The x property is the columnIndex and the y property is the rowIndex.

itemToDataTip

()method 
public function itemToDataTip(data:Object):String

Language Version: ActionScript 3.0
Product Version: Flex 3
Runtime Versions: Flash Player 9, AIR 1.1

Returns the dataTip string the renderer would display for the given data object based on the dataTipField and dataTipFunction properties. If the method cannot convert the parameter to a string, it returns a single space.

For use by developers creating subclasses of ListBase or its children. Not used by application developers.

Parameters

data:Object — Object to be rendered.

Returns
String — String displayable string based on the data.

itemToIcon

()method 
public function itemToIcon(data:Object):Class

Language Version: ActionScript 3.0
Product Version: Flex 3
Runtime Versions: Flash Player 9, AIR 1.1

Returns the class for an icon, if any, for a data item, based on the iconField and iconFunction properties. The field in the item can return a string as long as that string represents the name of a class in the application. The field in the item can also be a string that is the name of a variable in the document that holds the class for the icon.

Parameters

data:Object — The item from which to extract the icon class.

Returns
Class — The icon for the item, as a class reference or null if none.

itemToItemRenderer

()method 
public function itemToItemRenderer(item:Object):IListItemRenderer

Language Version: ActionScript 3.0
Product Version: Flex 3
Runtime Versions: Flash Player 9, AIR 1.1

Returns the item renderer for a given item in the data provider, if there is one. Since item renderers only exist for items that are within the set of viewable rows, this method returns null if the item is not visible. For DataGrid, this will return the first column's renderer.

Parameters

item:Object — The data provider item.

Returns
IListItemRenderer — The item renderer or null if the item is not currently displayed.

itemToLabel

()method 
public function itemToLabel(data:Object):String

Language Version: ActionScript 3.0
Product Version: Flex 3
Runtime Versions: Flash Player 9, AIR 1.1

Returns the string the renderer would display for the given data object based on the labelField and labelFunction properties. If the method cannot convert the parameter to a string, it returns a single space.

Parameters

data:Object — Object to be rendered.

Returns
String — The string to be displayed based on the data.

itemToUID

()method 
protected function itemToUID(data:Object):String

Language Version: ActionScript 3.0
Product Version: Flex 3
Runtime Versions: Flash Player 9, AIR 1.1

Determines the UID for a data provider item. All items in a data provider must either have a unique ID (UID) or one will be generated and associated with it. This means that you cannot have an object or scalar value appear twice in a data provider.

For example, the following data provider is not supported because the value "foo" appears twice and the UID for a string is the string itself:

var sampleDP:Array = ["foo", "bar", "foo"]

Simple dynamic objects can appear twice if they are two separate instances. The following is supported because each of the instances will be given a different UID because they are different objects:

var sampleDP:Array = [{label: "foo"}, {label: "foo"}]

Note that the following is not supported because the same instance appears twice.

      var foo:Object = {label: "foo"};
      sampleDP:Array = [foo, foo];

Parameters

data:Object — The data provider item.

Returns
String — The UID as a string.

makeRowsAndColumns

()method 
protected function makeRowsAndColumns(left:Number, top:Number, right:Number, bottom:Number, firstColumn:int, firstRow:int, byCount:Boolean = false, rowsNeeded:uint = 0):Point

Language Version: ActionScript 3.0
Product Version: Flex 3
Runtime Versions: Flash Player 9, AIR 1.1

Make enough rows and columns to fill the area described by left, top, right, bottom. Renderers are created and inserted into the listItems array starting at (firstColumn, firstRow)( and moving downwards.

If byCount and rowsNeeded are specified, then just make that many rows and ignore the bottom and right parameters.

Parameters

left:Number — Horizontal pixel offset of area to fill.
 
top:Number — Vertical pixel offset of area to fill.
 
right:Number — Horizontal pixel offset of area to fill (from left side of component).
 
bottom:Number — Vertical pixel offset of area to fill (from top of component).
 
firstColumn:int — Offset into listItems to store the first renderer to be created.
 
firstRow:int — Offset into listItems to store the first renderer to be created.
 
byCount:Boolean (default = false) — If true, make rowsNeeded number of rows and ignore bottom parameter.
 
rowsNeeded:uint (default = 0) — Number of rows to create if byCount is true.

Returns
Point — A Point containing the number of rows and columns created.

measure

()method 
override protected function measure():void

Language Version: ActionScript 3.0
Product Version: Flex 3
Runtime Versions: Flash Player 9, AIR 1.1

Calculates the measured width and height of the component based on the rowCount, columnCount, rowHeight and columnWidth properties.

See also

measureHeightOfItems

()method 
public function measureHeightOfItems(index:int = -1, count:int = 0):Number

Language Version: ActionScript 3.0
Product Version: Flex 3
Runtime Versions: Flash Player 9, AIR 1.1

Measures a set of items from the data provider using the current item renderer and returns the sum of the heights of those items.

This method is not implemented in the ListBase class and must be implemented in the child class.

A negative index value can be used to specify that the height calculation includes any headers.

Parameters

index:int (default = -1) — The data provider item at which to start calculating the height.
 
count:int (default = 0) — The number of items to use in calculating the height.

Returns
Number — the sum of the height of the measured items.

measureWidthOfItems

()method 
public function measureWidthOfItems(index:int = -1, count:int = 0):Number

Language Version: ActionScript 3.0
Product Version: Flex 3
Runtime Versions: Flash Player 9, AIR 1.1

Measures a set of items from the data provider using the current item renderer and returns the maximum width found. This method is used to calculate the width of the component. The various ListBase-derived classes have slightly different implementations. DataGrid measures its columns instead of data provider items, and TileList just measures the first item and assumes all items are the same size.

This method is not implemented in the ListBase class and must be implemented in the child class.

A negative index value can be used to specify that the width calculation includes any headers.

Parameters

index:int (default = -1) — The data provider item at which to start measuring the width.
 
count:int (default = 0) — The number of items to measure in calculating the width.

Returns
Number — The widest of the measured items.

mouseClickHandler

()method 
protected function mouseClickHandler(event:MouseEvent):void

Language Version: ActionScript 3.0
Product Version: Flex 3
Runtime Versions: Flash Player 9, AIR 1.1

Handles MouseEvent.MOUSE_CLICK events from any mouse targets contained in the list including the renderers. This method determines which renderer was clicked and dispatches a ListEvent.ITEM_CLICK event.

Parameters

event:MouseEvent — The MouseEvent object.

mouseDoubleClickHandler

()method 
protected function mouseDoubleClickHandler(event:MouseEvent):void

Language Version: ActionScript 3.0
Product Version: Flex 3
Runtime Versions: Flash Player 9, AIR 1.1

Handles MouseEvent.MOUSE_DOUBLE_CLICK events from any mouse targets contained in the list including the renderers. This method determines which renderer was clicked and dispatches a ListEvent.ITEM_DOUBLE_CLICK event.

Parameters

event:MouseEvent — The MouseEvent object.

mouseDownHandler

()method 
protected function mouseDownHandler(event:MouseEvent):void

Language Version: ActionScript 3.0
Product Version: Flex 3
Runtime Versions: Flash Player 9, AIR 1.1

Handles MouseEvent.MOUSE_DOWN events from any mouse targets contained in the list including the renderers. This method finds the renderer that was pressed and prepares to receive a MouseEvent.MOUSE_UP event.

Parameters

event:MouseEvent — The MouseEvent object.

mouseEventToItemRenderer

()method 
protected function mouseEventToItemRenderer(event:MouseEvent):IListItemRenderer

Language Version: ActionScript 3.0
Product Version: Flex 3
Runtime Versions: Flash Player 9, AIR 1.1

Determines which item renderer is under the mouse. Item renderers can be made of multiple mouse targets, or have visible areas that are not mouse targets. This method checks both targets and position to determine which item renderer the mouse is over from the user's perspective, which can differ from the information provided by the mouse event.

Parameters

event:MouseEvent — A MouseEvent that contains the position of the mouse and the object it is over.

Returns
IListItemRenderer — The item renderer the mouse is over or null if none.

mouseMoveHandler

()method 
protected function mouseMoveHandler(event:MouseEvent):void

Language Version: ActionScript 3.0
Product Version: Flex 3
Runtime Versions: Flash Player 9, AIR 1.1

Handles MouseEvent.MOUSE_MOVE events from any mouse targets contained in the list including the renderers. This method watches for a gesture that constitutes the beginning of a drag drop and send a DragEvent.DRAG_START event. It also checks to see if the mouse is over a non-target area of a renderer so that Flex can try to make it look like that renderer was the target.

Parameters

event:MouseEvent — The MouseEvent object.

mouseOutHandler

()method 
protected function mouseOutHandler(event:MouseEvent):void

Language Version: ActionScript 3.0
Product Version: Flex 3
Runtime Versions: Flash Player 9, AIR 1.1

Handles MouseEvent.MOUSE_OUT events from any mouse targets contained in the list including the renderers. This method finds out which renderer the mouse has left and removes the highlights.

Parameters

event:MouseEvent — The MouseEvent object.

mouseOverHandler

()method 
protected function mouseOverHandler(event:MouseEvent):void

Language Version: ActionScript 3.0
Product Version: Flex 3
Runtime Versions: Flash Player 9, AIR 1.1

Handles MouseEvent.MOUSE_OVER events from any mouse targets contained in the list, including the renderers. This method finds out which renderer the mouse is over and shows it as highlighted.

The list classes also call this from a MouseEvent.MOUSE_MOVE event. This event is used to detect movement in non-target areas of the renderers and in padded areas around the renderers.

Parameters

event:MouseEvent — The MouseEvent object.

mouseUpHandler

()method 
protected function mouseUpHandler(event:MouseEvent):void

Language Version: ActionScript 3.0
Product Version: Flex 3
Runtime Versions: Flash Player 9, AIR 1.1

Handles MouseEvent.MOUSE_DOWN events from any mouse targets contained in the list including the renderers. This method finds the renderer that was pressed and prepares to receive a MouseEvent.MOUSE_UP event.

Parameters

event:MouseEvent — The MouseEvent object.

mouseWheelHandler

()method 
override protected function mouseWheelHandler(event:MouseEvent):void

Language Version: ActionScript 3.0
Product Version: Flex 3
Runtime Versions: Flash Player 9, AIR 1.1

Handles mouseWheel events by changing scroll positions. This is a copy of the version in the ScrollControlBase class, modified to change the horizontalScrollPosition if the target is run horizontally.

Parameters

event:MouseEvent — The MouseEvent object.

See also

moveIndicatorsHorizontally

()method 
protected function moveIndicatorsHorizontally(uid:String, moveBlockDistance:Number):void

Language Version: ActionScript 3.0
Product Version: Flex 3
Runtime Versions: Flash Player 9, AIR 1.1

Move the selection and highlight indicators horizontally.

Parameters

uid:String — UID used to find the indicators.
 
moveBlockDistance:Number — The distance to move horizontally.

moveIndicatorsVertically

()method 
protected function moveIndicatorsVertically(uid:String, moveBlockDistance:Number):void

Language Version: ActionScript 3.0
Product Version: Flex 3
Runtime Versions: Flash Player 9, AIR 1.1

Move the selection and highlight indicators vertically.

Parameters

uid:String — UID used to find the indicators.
 
moveBlockDistance:Number — The distance to move vertically.

moveRowVertically

()method 
protected function moveRowVertically(i:int, numCols:int, moveBlockDistance:Number):void

Language Version: ActionScript 3.0
Product Version: Flex 3
Runtime Versions: Flash Player 9, AIR 1.1

Move a row vertically, and update the rowInfo record.

Parameters

i:int — The index of the row.
 
numCols:int — The number of columns in the row.
 
moveBlockDistance:Number — The distance to move.

moveSelectionHorizontally

()method 
protected function moveSelectionHorizontally(code:uint, shiftKey:Boolean, ctrlKey:Boolean):void

Language Version: ActionScript 3.0
Product Version: Flex 3
Runtime Versions: Flash Player 9, AIR 1.1

Moves the selection in a horizontal direction in response to the user selecting items using the left arrow or right arrow keys and modifiers such as the Shift and Ctrl keys. This method might change the horizontalScrollPosition, verticalScrollPosition, and caretIndex properties, and call the finishKeySelection() method to update the selection.

Not implemented in ListBase because the default list is single column and therefore does not scroll horizontally.

Parameters

code:uint — The key that was pressed (for example, Keyboard.LEFT).
 
shiftKey:Booleantrue if the Shift key was held down when the keyboard key was pressed.
 
ctrlKey:Booleantrue if the Ctrl key was held down when the keyboard key was pressed.

moveSelectionVertically

()method 
protected function moveSelectionVertically(code:uint, shiftKey:Boolean, ctrlKey:Boolean):void

Language Version: ActionScript 3.0
Product Version: Flex 3
Runtime Versions: Flash Player 9, AIR 1.1

Moves the selection in a vertical direction in response to the user selecting items using the up arrow or down arrow Keys and modifiers such as the Shift and Ctrl keys. This method might change the horizontalScrollPosition, verticalScrollPosition, and caretIndex properties, and call the finishKeySelection() method to update the selection.

Parameters

code:uint — The key that was pressed (for example, Keyboard.DOWN).
 
shiftKey:Booleantrue if the Shift key was held down when the keyboard key was pressed.
 
ctrlKey:Booleantrue if the Ctrl key was held down when the keyboard key was pressed.

prepareDataEffect

()method 
protected function prepareDataEffect(ce:CollectionEvent):void

Language Version: ActionScript 3.0
Product Version: Flex 3
Runtime Versions: Flash Player 9, AIR 1.1

Prepares the data effect for the collection event.

Parameters

ce:CollectionEvent

purgeItemRenderers

()method 
protected function purgeItemRenderers():void

Language Version: ActionScript 3.0
Product Version: Flex 3
Runtime Versions: Flash Player 9, AIR 1.1

Called by the updateDisplayList() method to remove existing item renderers and clean up various caching structures when the renderer changes.

reKeyVisibleData

()method 
protected function reKeyVisibleData():void

Language Version: ActionScript 3.0
Product Version: Flex 3
Runtime Versions: Flash Player 9, AIR 1.1

Update the keys in the visibleData hash table.

removeDataEffectItem

()method 
public function removeDataEffectItem(item:Object):void

Language Version: ActionScript 3.0
Product Version: Flex 3
Runtime Versions: Flash Player 9, AIR 1.1

Removes an item renderer if a data change effect is running. The item renderer must correspond to data that has already been removed from the data provider collection. This function will be called by a RemoveItemAction effect as part of a data change effect to specify the point at which a data item ceases to displayed by the control using an item renderer.

Parameters

item:Object — The item renderer to remove from the control's layout.

removeFromRowArrays

()method 
protected function removeFromRowArrays(i:int):void

Language Version: ActionScript 3.0
Product Version: Flex 3
Runtime Versions: Flash Player 9, AIR 1.1

Remove a row from the arrays that store references to the row.

Parameters

i:int — The index of the row.

removeIndicators

()method 
protected function removeIndicators(uid:String):void

Language Version: ActionScript 3.0
Product Version: Flex 3
Runtime Versions: Flash Player 9, AIR 1.1

Cleans up selection highlights and other associated graphics for a given item in the data provider.

Parameters

uid:String — The UID of the data provider item.

restoreRowArrays

()method 
protected function restoreRowArrays(modDeltaPos:int):void

Language Version: ActionScript 3.0
Product Version: Flex 3
Runtime Versions: Flash Player 9, AIR 1.1

Remove the requested number of rows from the beginning of the arrays that store references to the rows.

Parameters

modDeltaPos:int — The number of rows to remove.

scrollHorizontally

()method 
protected function scrollHorizontally(pos:int, deltaPos:int, scrollUp:Boolean):void

Language Version: ActionScript 3.0
Product Version: Flex 3
Runtime Versions: Flash Player 9, AIR 1.1

Adjusts the renderers in response to a change in scroll position.

The list classes attempt to optimize scrolling when the scroll position has changed by less than the number of visible rows. In that situation some rows are unchanged and just need to be moved, other rows are removed and then new rows are added. If the scroll position changes too much, all old rows are removed and new rows are added by calling the makeRowsAndColumns() method for the entire viewable area.

Not implemented in ListBase because the default list is single column and therefore doesn't scroll horizontally.

Parameters

pos:int — The new scroll position.
 
deltaPos:int — The change in position. This value is always a positive number.
 
scrollUp:Booleantrue if scroll position is getting smaller.

scrollPositionToIndex

()method 
protected function scrollPositionToIndex(horizontalScrollPosition:int, verticalScrollPosition:int):int

Language Version: ActionScript 3.0
Product Version: Flex 3
Runtime Versions: Flash Player 9, AIR 1.1

Returns the data provider index for the item at the first visible row and column for the given scroll positions.

Parameters

horizontalScrollPosition:int — The horizontalScrollPosition property value corresponding to the scroll position.
 
verticalScrollPosition:int — The verticalScrollPosition property value corresponding to the scroll position.

Returns
int — The data provider index.

scrollToIndex

()method 
public function scrollToIndex(index:int):Boolean

Language Version: ActionScript 3.0
Product Version: Flex 3
Runtime Versions: Flash Player 9, AIR 1.1

Ensures that the data provider item at the given index is visible. If the item is visible, the verticalScrollPosition property is left unchanged even if the item is not the first visible item. If the item is not currently visible, the verticalScrollPosition property is changed make the item the first visible item, unless there aren't enough rows to do so because the verticalScrollPosition value is limited by the maxVerticalScrollPosition property.

Parameters

index:int — The index of the item in the data provider.

Returns
Booleantrue if verticalScrollPosition changed.

scrollVertically

()method 
protected function scrollVertically(pos:int, deltaPos:int, scrollUp:Boolean):void

Language Version: ActionScript 3.0
Product Version: Flex 3
Runtime Versions: Flash Player 9, AIR 1.1

Adjusts the renderers in response to a change in scroll position.

The list classes attempt to optimize scrolling when the scroll position has changed by less than the number of visible rows. In that situation some rows are unchanged and just need to be moved, other rows are removed and then new rows are added. If the scroll position changes too much, all old rows are removed and new rows are added by calling the makeRowsAndColumns() method for the entire viewable area.

Parameters

pos:int — The new scroll position.
 
deltaPos:int — The change in position. This value is always a positive number.
 
scrollUp:Booleantrue if the scroll position is getting smaller.

seekPendingFailureHandler

()method 
protected function seekPendingFailureHandler(data:Object, info:ListBaseSeekPending):void

Language Version: ActionScript 3.0
Product Version: Flex 3
Runtime Versions: Flash Player 9, AIR 1.1

The default failure handler when a seek fails due to a page fault.

Parameters

data:Object — The data that caused the error.
 
info:ListBaseSeekPending — Data about a seek operation that was interrupted by an ItemPendingError error.

seekPendingResultHandler

()method 
protected function seekPendingResultHandler(data:Object, info:ListBaseSeekPending):void

Language Version: ActionScript 3.0
Product Version: Flex 3
Runtime Versions: Flash Player 9, AIR 1.1

The default result handler when a seek fails due to a page fault. This method checks to see if it has the most recent page fault result: if not it simply exits; if it does, it sets the iterator to the correct position.

Parameters

data:Object — The data that caused the error.
 
info:ListBaseSeekPending — Data about a seek operation that was interrupted by an ItemPendingError error.

seekPositionSafely

()method 
protected function seekPositionSafely(index:int):Boolean

Language Version: ActionScript 3.0
Product Version: Flex 3
Runtime Versions: Flash Player 9, AIR 1.1

Seek to a position, and handle an ItemPendingError if necessary.

Parameters

index:int — Index into the collection.

Returns
Booleanfalse if an ItemPendingError is thrown.

selectItem

()method 
protected function selectItem(item:IListItemRenderer, shiftKey:Boolean, ctrlKey:Boolean, transition:Boolean = true):Boolean

Language Version: ActionScript 3.0
Product Version: Flex 3
Runtime Versions: Flash Player 9, AIR 1.1

Updates the set of selected items given that the item renderer provided was clicked by the mouse and the keyboard modifiers are in the given state. This method also updates the display of the item renderers based on their updated selected state.

Parameters

item:IListItemRenderer — The item renderer that was clicked.
 
shiftKey:Booleantrue if the Shift key was held down when the mouse was clicked.
 
ctrlKey:Booleantrue if the Ctrl key was held down when the mouse was clicked.
 
transition:Boolean (default = true)true if the graphics for the selected state should be faded in using an effect.

Returns
Booleantrue if the set of selected items changed. Clicking on an already-selected item does not always change the set of selected items.

setRowCount

()method 
protected function setRowCount(v:int):void

Language Version: ActionScript 3.0
Product Version: Flex 3
Runtime Versions: Flash Player 9, AIR 1.1

Sets the rowCount property without causing invalidation or setting the explicitRowCount property, which permanently locks in the number of rows.

Parameters

v:int — The row count.

setRowHeight

()method 
protected function setRowHeight(v:Number):void

Language Version: ActionScript 3.0
Product Version: Flex 3
Runtime Versions: Flash Player 9, AIR 1.1

Sets the rowHeight property without causing invalidation or setting of explicitRowHeight which permanently locks in the height of the rows.

Parameters

v:Number — The row height, in pixels.

shiftRow

()method 
protected function shiftRow(oldIndex:int, newIndex:int, numCols:int, shiftItems:Boolean):void

Language Version: ActionScript 3.0
Product Version: Flex 3
Runtime Versions: Flash Player 9, AIR 1.1

Shift a row in the arrays that reference rows.

Parameters

oldIndex:int — Old index in the arrays.
 
newIndex:int — New index in the arrays.
 
numCols:int — The number of columns in the row.
 
shiftItems:Booleantrue if we actually move the item. false if we simply change the item's rowIndex.

showDropFeedback

()method 
public function showDropFeedback(event:DragEvent):void

Language Version: ActionScript 3.0
Product Version: Flex 3
Runtime Versions: Flash Player 9, AIR 1.1

Displays a drop indicator under the mouse pointer to indicate that a drag and drop operation is allowed and where the items will be dropped.

Parameters

event:DragEvent — A DragEvent object that contains information as to where the mouse is.

sumRowHeights

()method 
protected function sumRowHeights(startRowIdx:int, endRowIdx:int):Number

Language Version: ActionScript 3.0
Product Version: Flex 3
Runtime Versions: Flash Player 9, AIR 1.1

Determine the height of the requested set of rows.

Parameters

startRowIdx:int — The index of first row.
 
endRowIdx:int — The index of last row.

Returns
Number — The total height of the rows.

truncateRowArrays

()method 
protected function truncateRowArrays(numRows:int):void

Language Version: ActionScript 3.0
Product Version: Flex 3
Runtime Versions: Flash Player 9, AIR 1.1

Remove all remaining rows from the end of the arrays that store references to the rows.

Parameters

numRows:int — The row index to truncate from.

UIDToItemRenderer

()method 
protected function UIDToItemRenderer(uid:String):IListItemRenderer

Language Version: ActionScript 3.0
Product Version: Flex 3
Runtime Versions: Flash Player 9, AIR 1.1

Find an item renderer based on its UID if it is visible.

Parameters

uid:String — The UID of the item.

Returns
IListItemRenderer — The item renderer.

unconstrainRenderer

()method 
public function unconstrainRenderer(item:Object):void

Language Version: ActionScript 3.0
Product Version: Flex 3
Runtime Versions: Flash Player 9, AIR 1.1

Called by an UnconstrainItemAction effect as part of a data change effect if the item renderers corresponding to certain data items need to move outside the normal positions of item renderers in the control. The control does not attempt to position the item render for the duration of the effect.

Parameters

item:Object — The item renderer that is a target of the effect.

updateDisplayList

()method 
override protected function updateDisplayList(unscaledWidth:Number, unscaledHeight:Number):void

Language Version: ActionScript 3.0
Product Version: Flex 3
Runtime Versions: Flash Player 9, AIR 1.1

Adds or removes item renderers if the number of displayable items changed. Refreshes the item renderers if they might have changed. Applies the selection if it was changed programmatically.

Parameters

unscaledWidth:Number — Specifies the width of the component, in pixels, in the component's coordinates, regardless of the value of the scaleX property of the component.
 
unscaledHeight:Number — Specifies the height of the component, in pixels, in the component's coordinates, regardless of the value of the scaleY property of the component.

See also

updateList

()method 
protected function updateList():void

Language Version: ActionScript 3.0
Product Version: Flex 3
Runtime Versions: Flash Player 9, AIR 1.1

Refreshes all rows. Calling this method can require substantial processing, because it completely redraws all renderers in the list and does not return until complete.

Event Detail

change

Event
Event Object Type: mx.events.ListEvent
property ListEvent.type = mx.events.ListEvent.CHANGE

Language Version: ActionScript 3.0
Product Version: Flex 3
Runtime Versions: Flash Player 9, AIR 1.1

Dispatched when the selectedIndex or selectedItem property changes as a result of user interaction.

The ListEvent.CHANGE constant defines the value of the type property of the ListEvent object for a change event, which indicates that selection changed as a result of user interaction.

The properties of the event object have the following values:

PropertyValue
bubblesfalse
cancelablefalse
columnIndex The zero-based index of the column associated with the event.
currentTargetThe Object that defines the event listener that handles the event. For example, if you use myButton.addEventListener() to register an event listener, myButton is the value of the currentTarget.
itemRendererThe item renderer that was clicked.
reasonnull
rowIndexThe zero-based index of the item associated with the event.
targetThe Object that dispatched the event; it is not always the Object listening for the event. Use the currentTarget property to always access the Object listening for the event.
TypeListEvent.CHANGE

dataChange

Event  
Event Object Type: mx.events.FlexEvent
property FlexEvent.type = mx.events.FlexEvent.DATA_CHANGE

Language Version: ActionScript 3.0
Product Version: Flex 3
Runtime Versions: Flash Player 9, AIR 1.1

Dispatched when the data property changes.

When you use a component as an item renderer, the data property contains the data to display. You can listen for this event and update the component when the data property changes.

The FlexEvent.DATA_CHANGE constant defines the value of the type property of the event object for a dataChange event.

The properties of the event object have the following values:

PropertyValue
bubblesfalse
cancelablefalse
currentTargetThe Object that defines the event listener that handles the event. For example, if you use myButton.addEventListener() to register an event listener, myButton is the value of the currentTarget.
targetThe Object that dispatched the event; it is not always the Object listening for the event. Use the currentTarget property to always access the Object listening for the event.

itemClick

Event  
Event Object Type: mx.events.ListEvent
property ListEvent.type = mx.events.ListEvent.ITEM_CLICK

Language Version: ActionScript 3.0
Product Version: Flex 3
Runtime Versions: Flash Player 9, AIR 1.1

Dispatched when the user clicks on an item in the control.

The ListEvent.ITEM_CLICK constant defines the value of the type property of the ListEvent object for an itemClick event, which indicates that the user clicked the mouse over a visual item in the control.

The properties of the event object have the following values:

PropertyValue
bubblesfalse
cancelablefalse
columnIndex The zero-based index of the column associated with the event.
currentTargetThe Object that defines the event listener that handles the event. For example, if you use myButton.addEventListener() to register an event listener, myButton is the value of the currentTarget.
itemRendererThe item renderer that was clicked.
reasonnull
rowIndexThe zero-based index of the item associated with the event.
targetThe Object that dispatched the event; it is not always the Object listening for the event. Use the currentTarget property to always access the Object listening for the event.
TypeListEvent.ITEM_CLICK

itemDoubleClick

Event  
Event Object Type: mx.events.ListEvent
property ListEvent.type = mx.events.ListEvent.ITEM_DOUBLE_CLICK

Language Version: ActionScript 3.0
Product Version: Flex 3
Runtime Versions: Flash Player 9, AIR 1.1

Dispatched when the user double-clicks on an item in the control.

The ListEvent.ITEM_DOUBLE_CLICK constant defines the value of the type property of the ListEvent object for an itemDoubleClick event, which indicates that the user double clicked the mouse over a visual item in the control.

To receive itemDoubleClick events, you must set the component's doubleClickEnabled property to true.

The properties of the event object have the following values:

PropertyValue
bubblesfalse
cancelablefalse
columnIndex The zero-based index of the column associated with the event.
currentTargetThe Object that defines the event listener that handles the event. For example, if you use myButton.addEventListener() to register an event listener, myButton is the value of the currentTarget.
itemRendererThe item renderer that was double clicked.
reasonnull
rowIndexThe zero-based index of the item associated with the event.
targetThe Object that dispatched the event; it is not always the Object listening for the event. Use the currentTarget property to always access the Object listening for the event.
TypeListEvent.ITEM_DOUBLE_CLICK

itemRollOut

Event  
Event Object Type: mx.events.ListEvent
property ListEvent.type = mx.events.ListEvent.ITEM_ROLL_OUT

Language Version: ActionScript 3.0
Product Version: Flex 3
Runtime Versions: Flash Player 9, AIR 1.1

Dispatched when the user rolls the mouse pointer out of an item in the control.

The ListEvent.ITEM_ROLL_OUT constant defines the value of the type property of the ListEvent object for an itemRollOut event, which indicates that the user rolled the mouse pointer out of a visual item in the control.

The properties of the event object have the following values:

PropertyValue
bubblesfalse
cancelablefalse
columnIndex The zero-based index of the column associated with the event.
currentTargetThe Object that defines the event listener that handles the event. For example, if you use myButton.addEventListener() to register an event listener, myButton is the value of the currentTarget.
itemRendererThe item renderer that was rolled out.
reasonnull
rowIndexThe zero-based index of the item associated with the event.
targetThe Object that dispatched the event; it is not always the Object listening for the event. Use the currentTarget property to always access the Object listening for the event.
TypeListEvent.ITEM_ROLL_OUT

itemRollOver

Event  
Event Object Type: mx.events.ListEvent
property ListEvent.type = mx.events.ListEvent.ITEM_ROLL_OVER

Language Version: ActionScript 3.0
Product Version: Flex 3
Runtime Versions: Flash Player 9, AIR 1.1

Dispatched when the user rolls the mouse pointer over an item in the control.

The ListEvent.ITEM_ROLL_OVER constant defines the value of the type property of the ListEvent object for an itemRollOver event, which indicates that the user rolled the mouse pointer over a visual item in the control.

The properties of the event object have the following values:

PropertyValue
bubblesfalse
cancelablefalse
columnIndex The zero-based index of the column associated with the event.
currentTargetThe Object that defines the event listener that handles the event. For example, if you use myButton.addEventListener() to register an event listener, myButton is the value of the currentTarget.
itemRendererThe item renderer that was rolled over.
reasonnull
rowIndexThe zero-based index of the item associated with the event.
targetThe Object that dispatched the event; it is not always the Object listening for the event. Use the currentTarget property to always access the Object listening for the event.
TypeListEvent.ITEM_ROLL_OVER