Adobe® Flex® 4 Language Reference
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mx.core 
IUIComponent 
Packagemx.core
Interfacepublic interface IUIComponent extends IFlexDisplayObject , IBitmapDrawable , IEventDispatcher
Implementors PostScaleAdapter, UIComponent

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

The IUIComponent interface defines the basic set of APIs that you must implement to create a child of a Flex container or list.



Public Properties
 PropertyDefined By
 InheritedaccessibilityProperties : AccessibilityProperties
The current accessibility options for this display object.
IFlexDisplayObject
 Inheritedalpha : Number
Indicates the alpha transparency value of the object specified.
IFlexDisplayObject
  baselinePosition : Number
[read-only] The y-coordinate of the baseline of the first line of text of the component.
IUIComponent
 InheritedblendMode : String
A value from the BlendMode class that specifies which blend mode to use.
IFlexDisplayObject
 InheritedcacheAsBitmap : Boolean
If set to true, Flash runtimes cache an internal bitmap representation of the display object.
IFlexDisplayObject
  document : Object
A reference to the document object associated with this component.
IUIComponent
  enabled : Boolean
Whether the component can accept user interaction.
IUIComponent
  explicitHeight : Number
The explicitly specified height for the component, in pixels, as the component's coordinates.
IUIComponent
  explicitMaxHeight : Number
[read-only] Number that specifies the maximum height of the component, in pixels, as the component's coordinates.
IUIComponent
  explicitMaxWidth : Number
[read-only] Number that specifies the maximum width of the component, in pixels, as the component's coordinates.
IUIComponent
  explicitMinHeight : Number
[read-only] Number that specifies the minimum height of the component, in pixels, as the component's coordinates.
IUIComponent
  explicitMinWidth : Number
[read-only] Number that specifies the minimum width of the component, in pixels, as the component's coordinates.
IUIComponent
  explicitWidth : Number
The explicitly specified width for the component, in pixels, as the component's coordinates.
IUIComponent
 Inheritedfilters : Array
An indexed array that contains each filter object currently associated with the display object.
IFlexDisplayObject
  focusPane : Sprite
A single Sprite object that is shared among components and used as an overlay for drawing the focus indicator.
IUIComponent
 Inheritedheight : Number
Indicates the height of the display object, in pixels.
IFlexDisplayObject
  includeInLayout : Boolean
Specifies whether this component is included in the layout of the parent container.
IUIComponent
  isPopUp : Boolean
Set to true by the PopUpManager to indicate that component has been popped up.
IUIComponent
 InheritedloaderInfo : LoaderInfo
[read-only] Returns a LoaderInfo object containing information about loading the file to which this display object belongs.
IFlexDisplayObject
 Inheritedmask : DisplayObject
The calling display object is masked by the specified mask object.
IFlexDisplayObject
  maxHeight : Number
[read-only] Number that specifies the maximum height of the component, in pixels, as the component's coordinates.
IUIComponent
  maxWidth : Number
[read-only] Number that specifies the maximum width of the component, in pixels, as the component's coordinates.
IUIComponent
 InheritedmeasuredHeight : Number
[read-only] The measured height of this object.
IFlexDisplayObject
  measuredMinHeight : Number
The default minimum height of the component, in pixels.
IUIComponent
  measuredMinWidth : Number
The default minimum width of the component, in pixels.
IUIComponent
 InheritedmeasuredWidth : Number
[read-only] The measured width of this object.
IFlexDisplayObject
  minHeight : Number
[read-only] Number that specifies the minimum height of the component, in pixels, as the component's coordinates.
IUIComponent
  minWidth : Number
[read-only] Number that specifies the minimum width of the component, in pixels, as the component's coordinates.
IUIComponent
 InheritedmouseX : Number
[read-only] Indicates the x coordinate of the mouse or user input device position, in pixels.
IFlexDisplayObject
 InheritedmouseY : Number
[read-only] Indicates the y coordinate of the mouse or user input device position, in pixels.
IFlexDisplayObject
 Inheritedname : String
Indicates the instance name of the DisplayObject.
IFlexDisplayObject
 InheritedopaqueBackground : Object
Specifies whether the display object is opaque with a certain background color.
IFlexDisplayObject
  owner : DisplayObjectContainer
The owner of this IVisualElement object.
IUIComponent
 Inheritedparent : DisplayObjectContainer
[read-only] Indicates the DisplayObjectContainer object that contains this display object.
IFlexDisplayObject
  percentHeight : Number
Number that specifies the height of a component as a percentage of its parent's size.
IUIComponent
  percentWidth : Number
Number that specifies the width of a component as a percentage of its parent's size.
IUIComponent
 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.
IFlexDisplayObject
 Inheritedrotation : Number
Indicates the rotation of the DisplayObject instance, in degrees, from its original orientation.
IFlexDisplayObject
 Inheritedscale9Grid : Rectangle
The current scaling grid that is in effect.
IFlexDisplayObject
 InheritedscaleX : Number
Indicates the horizontal scale (percentage) of the object as applied from the registration point.
IFlexDisplayObject
 InheritedscaleY : Number
Indicates the vertical scale (percentage) of an object as applied from the registration point of the object.
IFlexDisplayObject
 InheritedscrollRect : Rectangle
The scroll rectangle bounds of the display object.
IFlexDisplayObject
 Inheritedstage : Stage
[read-only] The Stage of the display object.
IFlexDisplayObject
  systemManager : ISystemManager
A reference to the SystemManager object for this component.
IUIComponent
 Inheritedtransform : flash.geom:Transform
An object with properties pertaining to a display object's matrix, color transform, and pixel bounds.
IFlexDisplayObject
  tweeningProperties : Array
Used by EffectManager.
IUIComponent
 Inheritedvisible : Boolean
Whether or not the display object is visible.
IFlexDisplayObject
 Inheritedwidth : Number
Indicates the width of the display object, in pixels.
IFlexDisplayObject
 Inheritedx : Number
Indicates the x coordinate of the DisplayObject instance relative to the local coordinates of the parent DisplayObjectContainer.
IFlexDisplayObject
 Inheritedy : Number
Indicates the y coordinate of the DisplayObject instance relative to the local coordinates of the parent DisplayObjectContainer.
IFlexDisplayObject
Public Methods
 MethodDefined By
 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.
IEventDispatcher
 Inherited
Dispatches an event into the event flow.
IEventDispatcher
 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.
IFlexDisplayObject
  
A convenience method for determining whether to use the explicit or measured height
IUIComponent
  
A convenience method for determining whether to use the explicit or measured width
IUIComponent
 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.
IFlexDisplayObject
 Inherited
Converts the point object from the Stage (global) coordinates to the display object's (local) coordinates.
IFlexDisplayObject
 Inherited
Checks whether the EventDispatcher object has any listeners registered for a specific type of event.
IEventDispatcher
 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.
IFlexDisplayObject
 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.
IFlexDisplayObject
  
Initialize the object.
IUIComponent
 Inherited
Converts the point object from the display object's (local) coordinates to the Stage (global) coordinates.
IFlexDisplayObject
 Inherited
Moves this object to the specified x and y coordinates.
IFlexDisplayObject
  
owns(displayObject:DisplayObject):Boolean
Returns true if the chain of owner properties points from child to this UIComponent.
IUIComponent
  
Called by Flex when a UIComponent object is added to or removed from a parent.
IUIComponent
 Inherited
removeEventListener(type:String, listener:Function, useCapture:Boolean = false):void
Removes a listener from the EventDispatcher object.
IEventDispatcher
 Inherited
setActualSize(newWidth:Number, newHeight:Number):void
Sets the actual size of this object.
IFlexDisplayObject
  
setVisible(value:Boolean, noEvent:Boolean = false):void
Called when the visible property changes.
IUIComponent
 Inherited
Checks whether an event listener is registered with this EventDispatcher object or any of its ancestors for the specified event type.
IEventDispatcher
Property Detail

baselinePosition

property
baselinePosition:Number  [read-only]

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

The y-coordinate of the baseline of the first line of text of the component.

This property is used to implement the baseline constraint style. It is also used to align the label of a FormItem with the controls in the FormItem.



Implementation
    public function get baselinePosition():Number

document

property 
document:Object

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

A reference to the document object associated with this component. A document object is an Object at the top of the hierarchy of a Flex application, MXML component, or ActionScript component.



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

enabled

property 
enabled:Boolean

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

Whether the component can accept user interaction. After setting the enabled property to false, some components still respond to mouse interactions such as mouseOver. As a result, to fully disable UIComponents, you should also set the value of the mouseEnabled property to false. If you set the enabled property to false for a container, Flex dims the color of the container and of all of its children, and blocks user input to the container and to all of its children.



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

explicitHeight

property 
explicitHeight:Number

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

The explicitly specified height for the component, in pixels, as the component's coordinates. If no height is explicitly specified, the value is NaN.



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

See also

explicitMaxHeight

property 
explicitMaxHeight:Number  [read-only]

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

Number that specifies the maximum height of the component, in pixels, as the component's coordinates.



Implementation
    public function get explicitMaxHeight():Number

See also

explicitMaxWidth

property 
explicitMaxWidth:Number  [read-only]

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

Number that specifies the maximum width of the component, in pixels, as the component's coordinates.



Implementation
    public function get explicitMaxWidth():Number

See also

explicitMinHeight

property 
explicitMinHeight:Number  [read-only]

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

Number that specifies the minimum height of the component, in pixels, as the component's coordinates.



Implementation
    public function get explicitMinHeight():Number

See also

explicitMinWidth

property 
explicitMinWidth:Number  [read-only]

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

Number that specifies the minimum width of the component, in pixels, as the component's coordinates.



Implementation
    public function get explicitMinWidth():Number

See also

explicitWidth

property 
explicitWidth:Number

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

The explicitly specified width for the component, in pixels, as the component's coordinates. If no width is explicitly specified, the value is NaN.



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

See also

focusPane

property 
focusPane:Sprite

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

A single Sprite object that is shared among components and used as an overlay for drawing the focus indicator. Components share this object if their parent is a focused component, not if the component implements the IFocusManagerComponent interface.



Implementation
    public function get focusPane():Sprite
    public function set focusPane(value:Sprite):void

See also

includeInLayout

property 
includeInLayout:Boolean

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

Specifies whether this component is included in the layout of the parent container. If true, the object is included in its parent container's layout and is sized and positioned by its parent container as per its layout rules. If false, the object size and position are not affected by its parent container's layout.



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

isPopUp

property 
isPopUp:Boolean

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

Set to true by the PopUpManager to indicate that component has been popped up.



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

maxHeight

property 
maxHeight:Number  [read-only]

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

Number that specifies the maximum height of the component, in pixels, as the component's coordinates.



Implementation
    public function get maxHeight():Number

See also

maxWidth

property 
maxWidth:Number  [read-only]

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

Number that specifies the maximum width of the component, in pixels, as the component's coordinates.



Implementation
    public function get maxWidth():Number

See also

measuredMinHeight

property 
measuredMinHeight:Number

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

The default minimum height of the component, in pixels. This value is set by the measure() method.



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

measuredMinWidth

property 
measuredMinWidth:Number

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

The default minimum width of the component, in pixels. This value is set by the measure() method.



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

minHeight

property 
minHeight:Number  [read-only]

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

Number that specifies the minimum height of the component, in pixels, as the component's coordinates.



Implementation
    public function get minHeight():Number

See also

minWidth

property 
minWidth:Number  [read-only]

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

Number that specifies the minimum width of the component, in pixels, as the component's coordinates.



Implementation
    public function get minWidth():Number

See also

owner

property 
owner:DisplayObjectContainer

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

The owner of this IVisualElement object. By default, it is the parent of this IVisualElement object. However, if this IVisualElement object is a child component that is popped up by its parent, such as the drop-down list of a ComboBox control, the owner is the component that popped up this IVisualElement object.

This property is not managed by Flex, but by each component. Therefore, if you use the PopUpManger.createPopUp() or PopUpManger.addPopUp() method to pop up a child component, you should set the owner property of the child component to the component that popped it up.

The default value is the value of the parent property.



Implementation
    public function get owner():DisplayObjectContainer
    public function set owner(value:DisplayObjectContainer):void

percentHeight

property 
percentHeight:Number

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

Number that specifies the height of a component as a percentage of its parent's size. Allowed values are 0 to 100.



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

percentWidth

property 
percentWidth:Number

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

Number that specifies the width of a component as a percentage of its parent's size. Allowed values are 0 to 100.



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

systemManager

property 
systemManager:ISystemManager

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

A reference to the SystemManager object for this component.



Implementation
    public function get systemManager():ISystemManager
    public function set systemManager(value:ISystemManager):void

tweeningProperties

property 
tweeningProperties:Array

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

Used by EffectManager. Returns non-null if a component is not using the EffectManager to execute a Tween.



Implementation
    public function get tweeningProperties():Array
    public function set tweeningProperties(value:Array):void
Method Detail

getExplicitOrMeasuredHeight

()method
public function getExplicitOrMeasuredHeight():Number

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

A convenience method for determining whether to use the explicit or measured height

Returns
Number — A Number which is explicitHeight if defined or measuredHeight if not.

getExplicitOrMeasuredWidth

()method 
public function getExplicitOrMeasuredWidth():Number

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

A convenience method for determining whether to use the explicit or measured width

Returns
Number — A Number which is explicitWidth if defined or measuredWidth if not.

initialize

()method 
public function initialize():void

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

Initialize the object.

See also

owns

()method 
public function owns(displayObject:DisplayObject):Boolean

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

Returns true if the chain of owner properties points from child to this UIComponent.

Parameters

displayObject:DisplayObject — A UIComponent.

Returns
Booleantrue if the child is parented or owned by this UIComponent.

parentChanged

()method 
public function parentChanged(p:DisplayObjectContainer):void

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

Called by Flex when a UIComponent object is added to or removed from a parent. Developers typically never need to call this method.

Parameters

p:DisplayObjectContainer — The parent of this UIComponent object.

setVisible

()method 
public function setVisible(value:Boolean, noEvent:Boolean = false):void

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

Called when the visible property changes. Set the visible property to show or hide a component instead of calling this method directly.

Parameters

value:Boolean — The new value of the visible property. Specify true to show the component, and false to hide it.
 
noEvent:Boolean (default = false) — If true, do not dispatch an event. If false, dispatch a show event when the component becomes visible, and a hide event when the component becomes invisible.