Packagespark.effects.easing
Classpublic class Power
InheritancePower Inheritance EaseInOutBase Inheritance Object

Language Version : ActionScript 3.0
Product Version : Flex 4
Runtime Versions : Flash Player 10, AIR 1.5

The Power class defines the easing functionality using a polynomial expression. Easing consists of two phases: the acceleration, or ease in phase, followed by the deceleration, or ease out phase. The rate of acceleration and deceleration is based on the exponent property. The higher the value of the exponent property, the greater the acceleration and deceleration. Use the easeInFraction property to specify the percentage of an animation accelerating.

MXML SyntaxexpandedHide MXML Syntax

The <s:Power> tag inherits all of the tag attributes of its of its superclass, and adds the following tag attributes:

  <s:Power
    id="ID"
    exponent="2"
   />

View the examples


Public Properties
 PropertyDefined By
 InheritedeaseInFraction : Number
The percentage of an animation that should be spent accelerating.
EaseInOutBase
  exponent : Number
The exponent used in the easing calculation.
Power
Public Methods
 MethodDefined By
  
Power(easeInFraction:Number = 0.5, exponent:Number = 2)
Constructor.
Power
 Inherited
ease(fraction:Number):Number
Takes the fraction representing the elapsed duration of an animation (a value between 0.0 to 1.0) and returns a new elapsed value.
EaseInOutBase
Protected Methods
 MethodDefined By
 Inherited
easeIn(fraction:Number):Number
Returns a value that represents the eased fraction during the ease in phase of the animation.
EaseInOutBase
 Inherited
easeOut(fraction:Number):Number
Returns a value that represents the eased fraction during the ease out phase of the animation.
EaseInOutBase
Property Detail
exponentproperty
exponent:Number

Language Version : ActionScript 3.0
Product Version : Flex 4
Runtime Versions : Flash Player 10, AIR 1.5

The exponent used in the easing calculation. The higher the value of the exponent property, the greater the acceleration and deceleration. For example, to get quadratic behavior, set exponent to 2. To get cubic behavior, set exponent to 3.

The default value is 2.


Implementation
    public function get exponent():Number
    public function set exponent(value:Number):void
Constructor Detail
Power()Constructor
public function Power(easeInFraction:Number = 0.5, exponent:Number = 2)

Language Version : ActionScript 3.0
Product Version : Flex 4
Runtime Versions : Flash Player 10, AIR 1.5

Constructor.

Parameters
easeInFraction:Number (default = 0.5) — The fraction of the overall duration in the acceleration phase, between 0.0 and 1.0.
 
exponent:Number (default = 2) — The exponent used in the easing calculation.
Examples
SinePowerEffectExample.mxml
<?xml version="1.0"?>
<!--

  Licensed to the Apache Software Foundation (ASF) under one or more
  contributor license agreements.  See the NOTICE file distributed with
  this work for additional information regarding copyright ownership.
  The ASF licenses this file to You under the Apache License, Version 2.0
  (the "License"); you may not use this file except in compliance with
  the License.  You may obtain a copy of the License at

      http://www.apache.org/licenses/LICENSE-2.0

  Unless required by applicable law or agreed to in writing, software
  distributed under the License is distributed on an "AS IS" BASIS,
  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  See the License for the specific language governing permissions and
  limitations under the License.

-->
<!-- Simple example to demonstrate the s:Sine and s:Power classes. -->
<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:Sine id="sineEasing"
            easeInFraction="0.3"/>
        <s:Power id="powerEasing"
            exponent="4"/>
        <s:Move id="moveRight" 
            target="{myImage}"
            xBy="500"
            duration="2000"
            easer="{powerEasing}"/>
        <s:Move id="moveLeft" 
            target="{myImage}"
            xBy="-500"
            duration="2000"
            easer="{sineEasing}"/>
    </fx:Declarations>


    <s:Panel id="examplePanel"
        title="Sine and Power 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>



The Apache Software Foundation

Wed Nov 15 2017, 09:50 AM +01:00