You got it. The reason is that item renderers only exist for the visible rows, and are re-cycled when you scroll, or the data changes. Attempting to get data out of a renderer is like trying to taste Emeril's cooking by licking the tv screen.
Tracy Spratt, Lariat Services, development services available _____ From: flexcoders@yahoogroups.com [mailto:flexcod...@yahoogroups.com] On Behalf Of Matthew Sent: Monday, December 28, 2009 10:15 AM To: flexcoders@yahoogroups.com Subject: [SPAM] [flexcoders] Re: Access Checkbox ItemRenderer in AdvancedDataGrid Sorry, I just answered my own question.... It appears that you should never be able to access an ItemRenderer directly. If I want to find out that a checkbox is selected then I must listen for that event in the ItemRenderer and then set a value on the 'data' property. Then, the dataProvider is available to me with the updated value. That's the beauty of an ItemRenderer, I guess. --- In flexcod...@yahoogro <mailto:flexcoders%40yahoogroups.com> ups.com, "Matthew" <fume...@...> wrote: > > Hi - > > I have a button outside an AdvancedDataGrid. On the click event, I want to find which of my checkbox item renderers are selected. For some reason, I can't figure out. Here's my code below. Any tips are greatly appreciated. > > Thank you! > > <mx:Button label="Remove Selections" click="removeGrouping();" /> > <mx:AdvancedDataGrid > id="GroupingGrid" > width="100%" > height="45%"> > <mx:dataProvider> > <mx:HierarchicalData source="{model.groupingColl}" /> > </mx:dataProvider> > <mx:columns> > <mx:AdvancedDataGridColumn textAlign="center" dataField="label" headerText="Group"/> > <mx:AdvancedDataGridColumn textAlign="center" dataField="cpName" headerText="CP Name" /> > <mx:AdvancedDataGridColumn textAlign="center" dataField="parentId" headerText="Parent ID" /> > <mx:AdvancedDataGridColumn textAlign="center" dataField="parentName" headerText="Parent Name" /> > <mx:AdvancedDataGridColumn id="removeItemCol" dataField="removable" headerText="Remove" /> > </mx:columns> > > <mx:rendererProviders> > <mx:AdvancedDataGridRendererProvider > column="{removeItemCol}" > columnSpan="1" > renderer="com.renderer.RemoveItemCheckboxRenderer"/> > </mx:rendererProviders> > </mx:AdvancedDataGrid> > > > And here's my removeGroup() method. It returns null on the 'renderer' variable. > > /** User wants to remove a grouping > */ > private function removeGrouping():void{ > // Loop over the dataProvider and find the items selected, then remove them. > var dpLength:int = GroupingGrid.dataProvider.length; > for( var i:int=0; i<dpLength; i++ ){ > var im:Array = GroupingGrid.rendererProviders; // .renderer.generator as com.renderer.RemoveItemCheckboxRenderer; > var j:int=0; > while( j<im.length ){ > var myim:AdvancedDataGridRendererProvider = im[j] as AdvancedDataGridRendererProvider; > var renderer:RemoveItemCheckboxRenderer = myim.renderer as RemoveItemCheckboxRenderer; > j++; > } > } > } >
