[FLEX-18900] Setting paddingTop to negative number renders differently if Panel is wrapped in a Scroller

• Type: Bug
• Status: Closed
• Priority: Minor
• Resolution: Invalid
• Affects Version/s: Adobe Flex SDK Previous
• Component/s: Spark: VerticalLayout
• Environment: Affected OS(s): All OS Platforms; Language Found: English
• Assignee: Adobe JIRA
• Reporter: Adobe JIRA
• Created: 24/Apr/09 01:13
• Updated: 15/Apr/11 15:16
• Resolved: 08/Sep/09 15:27

Description

Steps to reproduce:
1. Compile & run:
<?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/halo" minWidth="1024" minHeight="768">
<s:layout>
<s:VerticalLayout/>
</s:layout>

<s:Panel width="150" height="150" >
<s:layout>
<s:VerticalLayout paddingTop="-20"/>
</s:layout>
<s:Rect width="100" height="100">
<s:fill>
<s:SolidColor color="0xCCCC00"/>
</s:fill>
</s:Rect>
</s:Panel>

<s:Scroller>
<s:Panel width="150" height="150">
<s:layout>
<s:VerticalLayout paddingTop="-20"/>
</s:layout>
<s:Rect width="100" height="100">
<s:fill>
<s:SolidColor color="0xCCCC00"/>
</s:fill>
</s:Rect>
</s:Panel>
</s:Scroller>
</s:Application>

Actual Results:
Notice in the top one the Rect is on top of the Panel header and on the bottom, the Rect is below the Panel header

Expected Results:
Should be consistent especially since the Scroller does not appear in this case.

Workaround (if any):