Since nobody has replied I'm continueing to try this. I currently think I may need to override all methods in UI component.
Is it clear what I'm trying to do? Is this the wrong way of doing it? I think its probably lighter than wrapping to components in a fully fledged UI component? * Some Thoughts* Also a comment on ListItemRenderer, theres an awful lot of methods that need to be implemented to make this work. I doubt all of them are used in a List Senario. Even implementing them all theres still a dependency on DisplayObject (who's methods seem to be implemented). It does feel to me like the architecture seems a bit off. I mean if all of those methods are implemented why is there still a dependency on DisplayObject. Its not just enough to implement IListRenderer which seems to defeat the purpose of an interace On Wed, Aug 18, 2010 at 11:42 PM, Wesley Acheson <[email protected]>wrote: > *Disclaimer:* This is a cross post with Stack Overflow. I know at least > one person on this list saw it there. > http://stackoverflow.com/questions/3507313/flex-switch-item-renderer > > Hi > > I was wondering if anyone had any luck with the following senario in flex. > > I'd like to be able to have a custom item renderer which delegates to > another renderer inside. > > The reason for this would be in a datagrid for instance displaying a > checkbox if the dataprovider for the row had a boolean value. Using the > default item renderer when the value was a non boolean. > > Basically I was hoping to use a proxy object (though not necessarily the > proxy class) so that I could a renderer which delegated all of its > responsibilties to a sub renderer. > > Hard to explain. > > *Edit 1* > > I think the following gives a clearer idea of what I had in mind. This is > only knocked up quickly for the purpose of showing the idea. > > *SwitchingRenderer.as* > > package com.example > { > import mx.controls.CheckBox; > > import mx.controls.dataGridClasses.DataGridItemRenderer; > > import mx.controls.listClasses.BaseListData; > > import mx.controls.listClasses.IDropInListItemRenderer; > > import mx.core.IDataRenderer; > > import mx.core.UIComponent; > > public class SwitchingRenderer extends UIComponent implements > IDataRenderer, IDropInListItemRenderer > > { > private var checkboxRenderer:CheckBox; > > private var defaultRenderer:DataGridItemRenderer; > > private var currentRenderer:IDataRenderer; > > public function SwitchingRenderer() > > { > this.checkboxRenderer = new CheckBox(); > > this.defaultRenderer = new DataGridItemRenderer(); > > this.currentRenderer = defaultRenderer(); > > super(); > } > > public function get data():Object > > { > //If the data for this cell is a boolean > // currentRender = checkBoxRenderer > > // otherwise > // currentRenderer = defaultRenderer > } > > public function set data(value:Object):void > > { > currentRenderer.data = value; > > } > > public function get listData():BaseListData > > { > return currentRenderer.listData; > > } > > public function set listData(value:BaseListData):void > > { > currentRenderer.listData = value; > > } > > > > } > } > > >
