[FLEX-15306] Zoom effect throws TypeError 1009

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: Adobe Flex SDK 3.0 (Release)
• Fix Version/s: Adobe Flex SDK 3.2 (Release)
• Component/s: Effects
• Environment: Affected OS(s): Windows; Affected OS(s): Windows XP; Browser: Internet Explorer 7.x; Language Found: English
• Assignee: Adobe JIRA
• Reporter: Adobe JIRA
• Created: 11/Aug/08 10:19
• Updated: 16/Sep/08 10:07
• Resolved: 16/Sep/08 10:04

Description

I installed the FlexBuilder 3 trial, so I assume that corresponds to SDK Flex 3. My apologies if this bug is already in the database. I couldn't locate it.

Steps to reproduce:
1. Here is some application code. The images (which I have not included) are just icons.

<?xml version="1.0" encoding="utf-8"?>
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml" layout="absolute">
<mx:Sequence id="zoom">
<mx:Zoom zoomWidthTo="3" zoomHeightTo="3" duration="2000"/>
<mx:Zoom zoomWidthTo="1" zoomHeightTo="1" duration="2000"/>
</mx:Sequence>
<mx:Button x="571" y="120" icon="@Embed(source='../images/NotRun2.gif')" rollOverEffect="

{zoom}" />
<mx:Button x="571" y="178" icon="@Embed(source='../images/NotRun.gif')" rollOverEffect="{zoom}

" />
<mx:Button x="571" y="237" icon="@Embed(source='../images/Time.gif')" rollOverEffect="

{zoom}

" />
</mx:Application>

2. Run app. Move the mouse cursor over and off of one of the buttons, which will cause it to grow and then shrink back.
3. Before it finishes the effect, move the mouse cursor back over the same button. I get an exception dialog.

Here is the exception I see:
TypeError: Error #1009: Cannot access a property or method of a null object reference.
at mx.effects.effectClasses::ZoomInstance/onTweenUpdate()[E:\dev\3.0.x\frameworks\projects\framework\src\mx\effects\effectClasses\ZoomInstance.as:422]
at mx.effects.effectClasses::TweenEffectInstance/onTweenEnd()[E:\dev\3.0.x\frameworks\projects\framework\src\mx\effects\effectClasses\TweenEffectInstance.as:385]
at mx.effects.effectClasses::ZoomInstance/onTweenEnd()[E:\dev\3.0.x\frameworks\projects\framework\src\mx\effects\effectClasses\ZoomInstance.as:459]
at mx.effects::Tween/endTween()[E:\dev\3.0.x\frameworks\projects\framework\src\mx\effects\Tween.as:524]
at mx.effects::Tween()[E:\dev\3.0.x\frameworks\projects\framework\src\mx\effects\Tween.as:278]
at mx.effects.effectClasses::TweenEffectInstance/createTween()[E:\dev\3.0.x\frameworks\projects\framework\src\mx\effects\effectClasses\TweenEffectInstance.as:291]
at mx.effects.effectClasses::ZoomInstance/play()[E:\dev\3.0.x\frameworks\projects\framework\src\mx\effects\effectClasses\ZoomInstance.as:362]
at mx.effects::EffectInstance/startEffect()[E:\dev\3.0.x\frameworks\projects\framework\src\mx\effects\EffectInstance.as:569]
at mx.effects::EffectInstance/http://www.adobe.com/2006/flex/mx/internal::playWithNoDuration()[E:\dev\3.0.x\frameworks\projects\framework\src\mx\effects\EffectInstance.as:704]
at mx.effects.effectClasses::SequenceInstance/end()[E:\dev\3.0.x\frameworks\projects\framework\src\mx\effects\effectClasses\SequenceInstance.as:293]
at mx.effects::EffectManager$/createAndPlayEffect()[E:\dev\3.0.x\frameworks\projects\framework\src\mx\effects\EffectManager.as:698]
at mx.effects::EffectManager$/http://www.adobe.com/2006/flex/mx/internal::eventHandler()[E:\dev\3.0.x\frameworks\projects\framework\src\mx\effects\EffectManager.as:575]

Workaround (if any): None that I know of.