public var interpolator:IInterpolator| Language Version : | ActionScript 3.0 |
| Runtime Versions : | Flash Player 10, AIR 1.5 |
The interpolator determines how in-between values in an animation
are calculated. By default, the MotionPath class assumes that the values are
of type Number and can calculate in-between Number values automatically.
If the MotionPath class is given keyframes with non-Number values, or if the
desired behavior should use a different approach to interpolation
(such as per-channel color interpolation), then an interpolator
should be supplied.
Flex supplies predefined interpolators in the spark.effects.interpolation package.
public var keyframes:Vector.<Keyframe>| Language Version : | ActionScript 3.0 |
| Runtime Versions : | Flash Player 10, AIR 1.5 |
A sequence of Keyframe objects that represent the time/value pairs
that the property takes during the animation. Each successive
pair of keyframes controls the animation during the time interval
between them.
The optional easer and valueBy
properties of the later keyframe are used to determine the behavior
during that interval. The sequence of keyframes must be sorted in
order of increasing time values.
Animations always start at time=0 and lasts for a duration
equal to the time value in the final keyframe.
If no keyframe is defined at time=0,
that keyframe is implicit, using the value of the
target property at the time the animation begins.
Because keyframes explicitly define the times involved in an animation,
the duration for an effect using keyframes is set according to the maximum time
of the final keyframe of all MotionPaths in the effect.
For example, if an effect has keyframes
at times 0, 500, 1000, and 2000, then the effective duration of that
effect is 2000 ms, regardless of any duration property set on the
effect itself.
Because the final keyframe determines the duration, there
must always be a final keyframe in any MotionPath. That is,
it is implicit that the time in the final keyframe is the
duration of the MotionPath.
Any keyframe may leave its value undefined (either unset, set to
null, or set to NaN).
In that case, the value is determined dynamically when the animation starts.
Any undefined value is determined as follows:
- If it is the first keyframe, it is calculated from the next keyframe
if that keyframe has both a
value and valueBy property set,
as the difference of those values. Otherwise it gets the
current value of the property from the target.
- If it is the final keyframe and the animation is running in a transition, it
uses the value in the destination view state of the transition.
- Otherwise, any keyframe calculates its
value by using the previous
keyframe's value and adding the current keyframe's valueBy
to it, if valueBy is set.
See also
public var property:String| Language Version : | ActionScript 3.0 |
| Runtime Versions : | Flash Player 10, AIR 1.5 |
The name of the property on the effect target to be animated.
public function clone():MotionPath| Language Version : | ActionScript 3.0 |
| Runtime Versions : | Flash Player 10, AIR 1.5 |
Returns a copy of this MotionPath object, including copies
of each keyframe.
Returns | MotionPath — A copy of this MotionPath object, including copies
of each keyframe.
|
public function getValue(fraction:Number):Object| Language Version : | ActionScript 3.0 |
| Runtime Versions : | Flash Player 10, AIR 1.5 |
Calculates and returns an interpolated value, given the elapsed
time fraction. The function determines the keyframe interval
that the fraction falls within and then interpolates within
that interval between the values of the bounding keyframes on that
interval.
Parameters
| fraction:Number — The fraction of the overall duration of the effect,
(a value from 0.0 to 1.0).
|
Returns | Object — The interpolated value.
|
<?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
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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:Keyframe and s:MotionPath 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>
<fx:Vector id="kf" type="spark.effects.animation.MotionPath">
<s:MotionPath property="scaleX">
<s:Keyframe time="250" value="0.5"/>
<s:Keyframe time="500" value="1.0"/>
<s:Keyframe time="750" value="0.5"/>
<s:Keyframe time="1000" value="1.0"/>
<s:Keyframe time="1250" value="0.5"/>
<s:Keyframe time="1500" value="1.0"/>
</s:MotionPath>
<s:MotionPath property="scaleY">
<s:Keyframe time="250" value="0.5"/>
<s:Keyframe time="500" value="1.0"/>
<s:Keyframe time="750" value="0.5"/>
<s:Keyframe time="1000" value="1.0"/>
<s:Keyframe time="1250" value="0.5"/>
<s:Keyframe time="1500" value="1.0"/>
</s:MotionPath>
</fx:Vector>
<s:Animate id="shrinkEffect"
motionPaths="{kf}"
target="{myImage}"/>
</fx:Declarations>
<s:Panel id="examplePanel"
title="Keyframe and MotionPath Effect Example"
width="75%" height="75%">
<s:layout>
<s:VerticalLayout paddingTop="10" paddingLeft="10"/>
</s:layout>
<!-- Directions -->
<s:VGroup id="detailsBox" width="50%" left="0">
<s:Label width="99%" color="blue"
text="Click the Adobe logo to watch the effect."/>
</s:VGroup>
<mx:Image id="myImage"
source="@Embed(source='assets/logo.jpg')"
click="shrinkEffect.end();shrinkEffect.play();"/>
</s:Panel>
</s:Application>
Object
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