[FLEX-27653] Cannot create MXML subclass of DataGridColumn and apply styles

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Won't Fix
• Affects Version/s: Adobe Flex SDK 4.5 (Release)
• Component/s: MXML Compiler
• Environment: Affected OS(s): All OS Platforms; Language Found: English
• Assignee: Adobe JIRA
• Reporter: Adobe JIRA
• Created: 08/Jun/11 09:30
• Updated: 10/Oct/11 12:30
• Resolved: 29/Sep/11 11:58

Description

Steps to reproduce:
1. Create a subclass with this code:

<?xml version="1.0" encoding="utf-8"?>
<mx:DataGridColumn xmlns:fx="http://ns.adobe.com/mxml/2009"
xmlns:s="library://ns.adobe.com/flex/spark"
xmlns:mx="library://ns.adobe.com/flex/mx"
headerText="MyHeader"
textAlign="center"/>

Actual Results:
Compiler Error:
1119: Access of possibly undefined property styleDeclaration through a reference with static type DataGridColumnSubclass.

Expected Results:
Compiles and works just fine

Workaround (if any):
Stub out some of these getters/setters yourself. All you really need is a styleDeclaration getter to return this DataGridColumn (and a styleDeclaration setter and a styleManager getter that do nothing since they won't really get called)

<?xml version="1.0" encoding="utf-8"?>
<mx:DataGridColumn xmlns:fx="http://ns.adobe.com/mxml/2009"
xmlns:s="library://ns.adobe.com/flex/spark"
xmlns:mx="library://ns.adobe.com/flex/mx"
headerText="MyHeader"
textAlign="center">
<fx:Script>
<![CDATA[
public function get styleDeclaration():CSSStyleDeclaration

{ return this; }

public function set styleDeclaration(value:CSSStyleDeclaration):void

{ // should never be called since getter will always return something }

public function get styleManager():IStyleManager2

{ // don't actually care what styleManager is since it's used to set styleDeclaration // which will never get called in our case anyways :-) return null; }

]]
>
</fx:Script>
</mx:DataGridColumn>