I know how to create a subclass of TreeItemRenderer and use it as the
itemRenderer of a
Tree. What I can't quite figure out is how to create a composite tree item
renderer
enclosing a TreeItemRenderer and a Label.
--- In flexcoders@yahoogroups.com, "Alex Harui" <[EMAIL PROTECTED]> wrote:
>
> You may need to bind the new renderer's .data to the TreeITemRenderer's
> .data property.
>
>
>
> I would just extend TreeItemRenderer and change what it does, though.
>
>
>
> ________________________________
>
> From: flexcoders@yahoogroups.com [mailto:[EMAIL PROTECTED] On
> Behalf Of an0one
> Sent: Tuesday, June 17, 2008 8:18 AM
> To: flexcoders@yahoogroups.com
> Subject: [flexcoders] How to compose a super tree item renderer using
> TreeItemRenderer and others
>
>
>
> Hi,
> I want a custom tree item renderer that consists of a basic
> TreeItemRenderer(to reuse its
> tree node icons) and several other standard controls(they are also
> IListItemRenderer
> implementors). Let's call it ComboTreeItemRenderer, and to simplify the
> matters, assume
> it is composed of a TreeItemRenderer and a Label.
>
> This is my first try:
> <mx:Tree width="100%" height="100%"
> id="tagTree"
> dataProvider="{myTags}"
> change="handleTagSelection(event);">
> <mx:itemRenderer>
> <mx:Component>
> <mx:HBox>
> <mx:TreeItemRenderer>
> </mx:TreeItemRenderer>
> <mx:Label text="[EMAIL PROTECTED]">
> </mx:Label>
> </mx:HBox>
> </mx:Component>
> </mx:itemRenderer>
> </mx:Tree>
>
> And the first error I met:
> "Could not resolve <mx:TreeItemRenderer> to a component implementation."
>
> I don't believe TreeItemRenderer can not be used in mxml coding, so I
> guess I was just not
> coding in the right way. But what's the right way then?
>
> However, that's not really what I was stumped by, since I found that I
> could write a custom
> component(named MyTreeItemRenderer) which extends
> TreeItemRenderer(nothing to
> override, just to work around the "could no resolve" error), and it
> could be resolved of
> course. So here is my second try:
> <mx:Tree width="100%" height="100%"
> id="tagTree"
> dataProvider="{myTags}"
> change="handleTagSelection(event);">
> <mx:itemRenderer>
> <mx:Component>
> <mx:HBox>
> <mx:MyTreeItemRenderer>
> </mx:MyTreeItemRenderer>
> <mx:Label text="[EMAIL PROTECTED]">
> </mx:Label>
> </mx:HBox>
> </mx:Component>
> </mx:itemRenderer>
> </mx:Tree>
>
> Now comes the really difficulties: I know I must assign values to some
> properties of
> MyTreeItemRenderer using information carried by data and listData, but
> what properties
> to assign value to? And what makes me even crazier is that I found
> neither listData and
> data was set(observed by overriding set listData and set data functions
> and find they were
> never called).
>
> Looking forward to seeing helpful hints. Thanks in advance.
>
