[FLEX-20439] Cannot popup a SkinnableContainer with a child added via addElement()

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Duplicate
• Affects Version/s: Adobe Flex SDK Previous
• Fix Version/s: Adobe Flex SDK 4.0 (Release)
• Component/s: Spark: Group, Spark: SkinnableContainer
• Environment: Affected OS(s): All OS Platforms; Language Found: English
• Assignee: Adobe JIRA
• Reporter: Adobe JIRA
• Created: 03/Aug/09 01:00
• Updated: 15/Apr/10 14:41
• Resolved: 13/Aug/09 17:15

Description

Steps to reproduce:
1. Run the attached MXML file

Actual Results:
Notice RTE:

Error: MXML element Group6.Button4 can only have one parent.
at spark.components::Group/setMXMLContent()[/Users/rfrishbe/opensource/flex/sdk/trunk/frameworks/projects/spark/src/spark/components/Group.as:475]
at spark.components::Group/set mxmlContent()[/Users/rfrishbe/opensource/flex/sdk/trunk/frameworks/projects/spark/src/spark/components/Group.as:417]
at spark.components::SkinnableContainer/partAdded()[/Users/rfrishbe/opensource/flex/sdk/trunk/frameworks/projects/spark/src/spark/components/SkinnableContainer.as:869]
at spark.components::Panel/partAdded()[/Users/rfrishbe/opensource/flex/sdk/trunk/frameworks/projects/spark/src/spark/components/Panel.as:155]
at spark.components.supportClasses::SkinnableComponent/findSkinParts()[/Users/rfrishbe/opensource/flex/sdk/trunk/frameworks/projects/spark/src/spark/components/supportClasses/SkinnableComponent.as:605]
at spark.components.supportClasses::SkinnableComponent/attachSkin()[/Users/rfrishbe/opensource/flex/sdk/trunk/frameworks/projects/spark/src/spark/components/supportClasses/SkinnableComponent.as:570]
at spark.components.supportClasses::SkinnableComponent/validateSkinChange()[/Users/rfrishbe/opensource/flex/sdk/trunk/frameworks/projects/spark/src/spark/components/supportClasses/SkinnableComponent.as:346]
at spark.components.supportClasses::SkinnableComponent/createChildren()[/Users/rfrishbe/opensource/flex/sdk/trunk/frameworks/projects/spark/src/spark/components/supportClasses/SkinnableComponent.as:316]
at spark.components::SkinnableContainer/createChildren()[/Users/rfrishbe/opensource/flex/sdk/trunk/frameworks/projects/spark/src/spark/components/SkinnableContainer.as:844]
at mx.core::UIComponent/initialize()[/Users/rfrishbe/opensource/flex/sdk/trunk/frameworks/projects/framework/src/mx/core/UIComponent.as:6654]
at mx.managers.systemClasses::ChildManager/childAdded()[/Users/rfrishbe/opensource/flex/sdk/trunk/frameworks/projects/framework/src/mx/managers/systemClasses/ChildManager.as:176]
at mx.managers::SystemManager/http://www.adobe.com/2006/flex/mx/internal::rawChildren_addChildAt()[/Users/rfrishbe/opensource/flex/sdk/trunk/frameworks/projects/framework/src/mx/managers/SystemManager.as:1939]
at mx.managers::SystemManager/addChild()[/Users/rfrishbe/opensource/flex/sdk/trunk/frameworks/projects/framework/src/mx/managers/SystemManager.as:1580]
at mx.managers::PopUpManagerImpl/addPopUp()[/Users/rfrishbe/opensource/flex/sdk/trunk/frameworks/projects/framework/src/mx/managers/PopUpManagerImpl.as:332]
at mx.managers::PopUpManager$/addPopUp()[/Users/rfrishbe/opensource/flex/sdk/trunk/frameworks/projects/framework/src/mx/managers/PopUpManager.as:184]
at sparkTest/Application_creationComplete()[/Users/rfrishbe/opensource/flex/sdk/trunk/development/eclipse/flex/sparkTest/src/sparkTest.mxml:20]
at sparkTest/___sparkTest_Application1_creationComplete()[/Users/rfrishbe/opensource/flex/sdk/trunk/development/eclipse/flex/sparkTest/src/sparkTest.mxml:4]
at flash.events::EventDispatcher/dispatchEventFunction()
at flash.events::EventDispatcher/dispatchEvent()
at mx.core::UIComponent/dispatchEvent()[/Users/rfrishbe/opensource/flex/sdk/trunk/frameworks/projects/framework/src/mx/core/UIComponent.as:11449]
at mx.core::UIComponent/set initialized()[/Users/rfrishbe/opensource/flex/sdk/trunk/frameworks/projects/framework/src/mx/core/UIComponent.as:1522]
at mx.managers::LayoutManager/doPhasedInstantiation()[/Users/rfrishbe/opensource/flex/sdk/trunk/frameworks/projects/framework/src/mx/managers/LayoutManager.as:759]
at mx.managers::LayoutManager/doPhasedInstantiationCallback()[/Users/rfrishbe/opensource/flex/sdk/trunk/frameworks/projects/framework/src/mx/managers/LayoutManager.as:1067]

Expected Results:
No RTE...just popup

Workaround (if any):
Tho we strongly discourage the use of mxmlContent, it does work in this case. Rather than:

pnl.addElement(b);

You can use:

pnl.mxmlContent = [b];