Did you put any visual children in Base?
If you did it’s not going to work because you can’t have declared
children in a parent component and subcomponent (though we may describe how to
simulate that in some of our docs with other features).
You can try rewriting Base.mxml to be
Base.as if there weren’t visual children
Public class Base extends Canvas
{
//declare properties and methods
}
Matt
From:
[email protected] [mailto:[EMAIL PROTECTED] On Behalf Of Jason Y. Kwong
Sent: Friday, December 30, 2005
10:44 AM
To: Flashcoders mailing list;
[email protected]
Subject: [flexcoders] Flex 2:
Component inheritance?
I'm relatively new to
Flex 2 and what I'm trying to do is to create a set of custom MXML components
that share the same AS base class. So I start with the base component, an
empty container to which I add properties/methods via AS. Call it Base.mxml:
<?xml version="1.0" encoding="utf-8"?>
<mx:Canvas xmlns:mx="http://www.macromedia.com/2005/mxml"
xmlns="*">
<mx:Script source="Base_inc.as"/> <!-- Declare
base properties/methods -->
</mx:Canvas>
Then I create a component based on Base. I add a Button and a
TextInput. Call it ComponentA.mxml :
<?xml version="1.0" encoding="utf-8"?>
<Base xmlns:mx="http://www.macromedia.com/2005/mxml"
xmlns="*">
<mx:Script
source="ComponentA_inc.as"/> <!--
Component-specific code -->
<mx:Button x="5" y="41"
label="Button"/>
<mx:TextInput x="2" y="12"
text="hello" id="MyText"/>
</Base>
Then I add ComponentA to an application. Everything looks fine in the
design view. However, when the app is run, the controls added by
ComponentA do not show up. I put in a creationComplete handler for
ComponentA and traced the value of "MyText" and it came out null, so
it looks like it never got created.
Am I missing something? If this isn't how you do component inheritance,
then how can it be done while still taking advantage of the easy layout offered
by MXML?
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