I think I would approach this by having an "isExpanded" property on the dataProvider items, and toggle that property using logic in a change handler. The renderer would use that property to set its visual state.
There won't be any clear relationship between selectedItems and the visual renderers. Tracy Spratt, Lariat Services, development services available _____ From: [email protected] [mailto:[email protected]] On Behalf Of gwangdesign Sent: Friday, March 13, 2009 6:05 PM To: [email protected] Subject: [flexcoders] changes on item renderers on a List Hi, I am re-sending this question since this seemingly simple question has been taking me a bit much longer than I expected;) I have a whole bunch of item renderers inside a List (or it lays out and scrolls the renderers the way a List does). Here is what I am trying to do: I'd like to expand/shrink these item renderers based on whether they are newly "selected" or "de-selected". My approach right now is extending List class. I listen to ListEvent.CHANGE event and invalidate my component as it occurs. I then try to figure out which renderer has been selected/deselected... and I can't. Basically my component is interested in the following actions: 1. When "allowMultipleSelection" is true, user selects an item that hasn't been selected yet; 2. When "allowMultipleSelection" is true, user selects an already selected item; 3. When "allowMultipleSelection" is false, user selects a new item; 4. When "allowMultipleSelection" is false, user selects an already selected item; I poke into the code of mx.controls.ListBase and List and the code is a bit over my head right now;) Any ideas? pseudo code is welcome! Thanks and have a great weekend! -geng
