| Package | spark.effects.easing |
| Class | public class Linear |
| Inheritance | Linear  Object |
| Implements | IEaser |
| Language Version: | ActionScript 3.0 |
| Product Version: | Flex 4 |
| Runtime Versions: | Flash Player 10, AIR 1.5 |
easeInFraction property, it
then uses uniform (linear) motion through the next phase, and
finally decelerates until the end during the period specified
by the easeOutFraction property.
The easing values for the three phases are calculated such that the behavior of constant acceleration, linear motion, and constant deceleration all occur within the specified duration of the animation.
Strict linear motion can be achieved by setting
easeInFraction and easeOutFraction to 0.0.
Note that if acceleration or
deceleration are not 0.0, then the motion during the middle
phase is not at the same speed as that of pure
linear motion. The middle phase consists of
uniform motion, but the speed of that motion is determined by
the size of that phase relative to the overall animation.
Show MXML Syntax
Hide MXML SyntaxThe <s:Linear> tag
inherits all of the tag attributes of its of its superclass,
and adds the following tag attributes:
<s:Linear
id="ID"
easeInFraction="0"
easeOutFraction="0"
/>
More examples
| Property | Defined By | ||
|---|---|---|---|
 | constructor : Object
A reference to the class object or constructor function for a given object instance. | Object | |
| easeInFraction : Number
The fraction an animation spent accelerating,
between 0.0 and 1.0. | Linear | ||
| easeOutFraction : Number
The percentage an animation will spend decelerating,
between 0.0 and 1.0. | Linear | ||
| prototype : Object [static]
A reference to the prototype object of a class or function object. | Object | |
| Method | Defined By | ||
|---|---|---|---|
Constructor. | Linear | ||
Calculates the eased fraction value based on the
easeInFraction and easeOutFraction
properties. | Linear | ||
|
Indicates whether an object has a specified property defined. | Object | |
|
Indicates whether an instance of the Object class is in the prototype chain of the object specified
as the parameter. | Object | |
|
Indicates whether the specified property exists and is enumerable. | Object | |
|
Sets the availability of a dynamic property for loop operations. | Object | |
|
Returns the string representation of this object, formatted according to locale-specific conventions. | Object | |
|
Returns the string representation of the specified object. | Object | |
|
Returns the primitive value of the specified object. | Object | |
easeInFraction | property |
easeInFraction:Number| Language Version: | ActionScript 3.0 |
| Product Version: | Flex 4 |
| Runtime Versions: | Flash Player 10, AIR 1.5 |
The fraction an animation spent accelerating,
between 0.0 and 1.0.
The values of the easeOutFraction property
and easeInFraction property must satisfy the
equation easeOutFraction + easeInFraction <= 1
where any remaining time is spent in the linear motion phase.
The default value is 0.
Implementation
public function get easeInFraction():Number public function set easeInFraction(value:Number):voideaseOutFraction | property |
easeOutFraction:Number| Language Version: | ActionScript 3.0 |
| Product Version: | Flex 4 |
| Runtime Versions: | Flash Player 10, AIR 1.5 |
The percentage an animation will spend decelerating,
between 0.0 and 1.0.
The values of the easeOutFraction property
and easeInFraction property must satisfy the
equation easeOutFraction + easeInFraction <= 1
where any remaining time is spent in the linear motion phase.
The default value is 0.
Implementation
public function get easeOutFraction():Number public function set easeOutFraction(value:Number):voidLinear | () | Constructor |
public function Linear(easeInFraction:Number = 0, easeOutFraction:Number = 0)| Language Version: | ActionScript 3.0 |
| Product Version: | Flex 4 |
| Runtime Versions: | Flash Player 10, AIR 1.5 |
Constructor.
ParameterseaseInFraction:Number (default = 0) | |
easeOutFraction:Number (default = 0) |
ease | () | method |
public function ease(fraction:Number):Number| Language Version: | ActionScript 3.0 |
| Product Version: | Flex 4 |
| Runtime Versions: | Flash Player 10, AIR 1.5 |
Calculates the eased fraction value based on the
easeInFraction and easeOutFraction
properties.
If fraction
is less than easeInFraction, it calculates a value
based on accelerating up to the linear motion phase.
If fraction
is greater than easeInFraction and less than
(1-easeOutFraction), it calculates a value based
on the linear motion phase between the easing in and easing out phases.
Otherwise, it calculates a value based on constant deceleration
between the linear motion phase and 0.0.
Parameters
fraction:Number — The elapsed fraction of the animation,
between 0.0 and 1.0..
|
Number — The eased fraction of the animation.
|
<?xml version="1.0"?>
<!-- Simple example to demonstrate the s:Linear class. -->
<s:Application
xmlns:fx="http://ns.adobe.com/mxml/2009"
xmlns:mx="library://ns.adobe.com/flex/mx"
xmlns:s="library://ns.adobe.com/flex/spark">
<fx:Declarations>
<s:Linear id="linearEasing"
easeInFraction="0.3"/>
<s:Elastic id="elasticEasing"/>
<s:Move id="moveRight"
target="{myImage}"
xBy="500"
duration="2000"
easer="{elasticEasing}"/>
<s:Move id="moveLeft"
target="{myImage}"
xBy="-500"
duration="2000"
easer="{linearEasing}"/>
</fx:Declarations>
<s:Panel id="examplePanel"
title="Linear Effect Example"
width="75%" height="75%">
<!-- Directions -->
<s:VGroup id="detailsBox" width="50%" top="5" left="5">
<s:Label width="99%" color="blue"
text="Click the buttons to watch the effect."/>
</s:VGroup>
<mx:Image id="myImage" top="20"
source="@Embed(source='assets/logo.jpg')"/>
<s:Button label="Move Right"
bottom="10" left="5"
click="moveRight.end();moveRight.play();"/>
<s:Button label="Move Left"
bottom="10" left="100"
click="moveLeft.end();moveLeft.play();"/>
</s:Panel>
</s:Application>
Mon Nov 28 2011, 06:48 AM -08:00