Details
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Bug
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Status: Closed
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Major
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Resolution: Fixed
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Adobe Flex SDK Previous
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None
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None
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Affected OS(s): All OS Platforms
Language Found: English
Description
SDK steps to reproduce:
1. Create an MXML file like this:
<?xml version="1.0" encoding="utf-8"?>
<s:Application xmlns:fx="http://ns.adobe.com/mxml/2009"
xmlns:s="library://ns.adobe.com/flex/spark"
xmlns:mx="library://ns.adobe.com/flex/mx" minWidth="955" minHeight="600" xmlns:components="my.favorite.components.*">
<s:List x="49" y="101" skinClass="MyListSkin2"></s:List>
</s:Application>
2. Create a List Skin file like this:
<?xml version="1.0" encoding="utf-8"?>
<s:Skin xmlns:fx="http://ns.adobe.com/mxml/2009"
xmlns:s="library://ns.adobe.com/flex/spark"
xmlns:mx="library://ns.adobe.com/flex/mx">
<!-- host component -->
<fx:Metadata>
[HostComponent("spark.components.List")]
</fx:Metadata>
<!-- states -->
<s:states>
<s:State name="disabled" />
<s:State name="normal" />
</s:states>
<!-- SkinParts
name=scroller, type=spark.components.Scroller, required=false
name=dropIndicator, type=mx.core.IFactory, required=false
name=dataGroup, type=spark.components.DataGroup, required=false
-->
<s:DataGroup id="dataGroup" >
</s:DataGroup>
</s:Skin>
3. Connect them and run in the browser.
Actual Results:
Error: BasicLayout doesn't support virtualization.
at spark.layouts::BasicLayout/checkUseVirtualLayout()[E:\dev\4.0.0\frameworks\projects\spark\src\spark\layouts\BasicLayout.as:186]
at spark.layouts::BasicLayout/measure()[E:\dev\4.0.0\frameworks\projects\spark\src\spark\layouts\BasicLayout.as:196]
at spark.components.supportClasses::GroupBase/measure()[E:\dev\4.0.0\frameworks\projects\spark\src\spark\components\supportClasses\GroupBase.as:1078]
at spark.components::DataGroup/measure()[E:\dev\4.0.0\frameworks\projects\spark\src\spark\components\DataGroup.as:1299]
at mx.core::UIComponent/measureSizes()[E:\dev\4.0.0\frameworks\projects\framework\src\mx\core\UIComponent.as:8042]
at mx.core::UIComponent/validateSize()[E:\dev\4.0.0\frameworks\projects\framework\src\mx\core\UIComponent.as:7966]
at mx.managers::LayoutManager/validateSize()[E:\dev\4.0.0\frameworks\projects\framework\src\mx\managers\LayoutManager.as:617]
at mx.managers::LayoutManager/doPhasedInstantiation()[E:\dev\4.0.0\frameworks\projects\framework\src\mx\managers\LayoutManager.as:709]
at mx.managers::LayoutManager/doPhasedInstantiationCallback()[E:\dev\4.0.0\frameworks\projects\framework\src\mx\managers\LayoutManager.as:1072]
Expected results:
Shouldn't DataGroup layout default to something reasonable so that it doesn't RTE by default?
FB Steps to reproduce:
1. New project
2. Type <s:List skinClass="
3. Take the hint to create a new skin. Do not create a copy - create an empty skin and edit it.
4. The comments tell you to create a dataGroup. Ok, then type <s:DataGroup id="dataGroup"/>
5. Go back to the main file (with the list in it), and go to DV.
Actual Results:
White screen. Warning in problems panel: "Design mode: error in component layout."
Expected Results:
This is an incredibly simple use-case. DataGroup is optional - why does it break DV when I add a trivial dataGroup?
Workaround (if any):
(I only figured this out by using the debugger): add a layout to the dataGroup:
<s:DataGroup id="dataGroup>
<s:layout>
<s:HorizontalLayout/>
</s:Layout>
</s:DataGroup>