SimpleTimeline.as
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/**
* VERSION: 1.38
* DATE: 2010-05-24
* AS3 (AS2 version is also available)
* UPDATES AND DOCUMENTATION AT: http://www.TweenLite.com
**/
package com.greensock.core {
/**
* SimpleTimeline is the base class for the TimelineLite and TimelineMax classes. It provides the
* most basic timeline functionality and is used for the root timelines in TweenLite. It is meant
* to be very fast and lightweight. <br /><br />
*
* <b>Copyright 2010, GreenSock. All rights reserved.</b> This work is subject to the terms in <a href="http://www.greensock.com/terms_of_use.html">http://www.greensock.com/terms_of_use.html</a> or for corporate Club GreenSock members, the software agreement that was issued with the corporate membership.
*
* @author Jack Doyle, jack@greensock.com
*/
public class SimpleTimeline extends TweenCore {
/** @private **/
protected var _firstChild:TweenCore;
/** @private **/
protected var _lastChild:TweenCore;
/** If a timeline's autoRemoveChildren is true, its children will be removed and made eligible for garbage collection as soon as they complete. This is the default behavior for the main/root timeline. **/
public var autoRemoveChildren:Boolean;
public function SimpleTimeline(vars:Object=null) {
super(0, vars);
}
/** @private **/
public function addChild(tween:TweenCore):void {
if (!tween.cachedOrphan && tween.timeline) {
tween.timeline.remove(tween, true); //removes from existing timeline so that it can be properly added to this one.
}
tween.timeline = this;
if (tween.gc) {
tween.setEnabled(true, true);
}
if (_firstChild) {
_firstChild.prevNode = tween;
}
tween.nextNode = _firstChild;
_firstChild = tween;
tween.prevNode = null;
tween.cachedOrphan = false;
}
/** @private **/
public function remove(tween:TweenCore, skipDisable:Boolean=false):void {
if (tween.cachedOrphan) {
return; //already removed!
} else if (!skipDisable) {
tween.setEnabled(false, true);
}
if (tween.nextNode) {
tween.nextNode.prevNode = tween.prevNode;
} else if (_lastChild == tween) {
_lastChild = tween.prevNode;
}
if (tween.prevNode) {
tween.prevNode.nextNode = tween.nextNode;
} else if (_firstChild == tween) {
_firstChild = tween.nextNode;
}
tween.cachedOrphan = true;
//don't null nextNode and prevNode, otherwise the chain could break in rendering loops.
}
/** @private **/
override public function renderTime(time:Number, suppressEvents:Boolean=false, force:Boolean=false):void {
var tween:TweenCore = _firstChild, dur:Number, next:TweenCore;
this.cachedTotalTime = time;
this.cachedTime = time;
while (tween) {
next = tween.nextNode; //record it here because the value could change after rendering...
if (tween.active || (time >= tween.cachedStartTime && !tween.cachedPaused && !tween.gc)) {
if (!tween.cachedReversed) {
tween.renderTime((time - tween.cachedStartTime) * tween.cachedTimeScale, suppressEvents, false);
} else {
dur = (tween.cacheIsDirty) ? tween.totalDuration : tween.cachedTotalDuration;
tween.renderTime(dur - ((time - tween.cachedStartTime) * tween.cachedTimeScale), suppressEvents, false);
}
}
tween = next;
}
}
//---- GETTERS / SETTERS ------------------------------------------------------------------------------
/**
* @private
* Reports the totalTime of the timeline without capping the number at the totalDuration (max) and zero (minimum) which can be useful when
* unpausing tweens/timelines. Imagine a case where a paused tween is in a timeline that has already reached the end, but then
* the tween gets unpaused - it needs a way to place itself accurately in time AFTER what was previously the timeline's end time.
* In a SimpleTimeline, rawTime is always the same as cachedTotalTime, but in TimelineLite and TimelineMax, it can be different.
*
* @return The totalTime of the timeline without capping the number at the totalDuration (max) and zero (minimum)
*/
public function get rawTime():Number {
return this.cachedTotalTime;
}
}
}