This looks like a bug in the ListCollectionView.as file. If you'd like, you can monkey patch this code to work.
The bug is at line 529: this.addItemAt(addList.getItemAt(i), i+index); should be: list.addItemAt(addList.getItemAt(i), i+index); I figured this out from the addItemAt function. If you don't know how to monkey patch Flex code, this is how I did it: -Find out the package directory from the package line (In this case mx.collections). -Create the directories as per this line (In this case create a directory mx in your src directory. In this directory create a directory named collections). -Inside the directory create an ActionScript file with the same name as the file you are monkey patching (In this case ListCollectionView.as). -Copy and paste all the code from the original file into this new file. -Change this new file as you see fit. When Flex compiles your code will be included instead of the framework code. You should file a bug with the fix. --- In flexcoders@yahoogroups.com, "johncch85" <john...@...> wrote: > > I understand that ArrayCollection.addAll was added in flex sdk 3.4. I'm > coding a simple application and I'm hitting this problem. I would like to ask > if anyone knows what's happening: > > Here's the source, just a simple mxml: > > <?xml version="1.0" encoding="utf-8"?> > <mx:Application xmlns:mx="http://www.adobe.com/2006/mxml"; > creationComplete="creationComplete()"> > <mx:Script> > <![CDATA[ > import mx.collections.ArrayCollection; > private var a:Array = [ > { key: "a", value: "b" }, > { key: "a", value: "b" }, > { key: "a", value: "x" }, > { key: "a", value: "b" } > ]; > > private var b:Array = [ > { key: "b", value: "c" }, > { key: "b", value: "x" }, > { key: "b", value: "c" }, > { key: "b", value: "c" } > ]; > > private var c:Array = [ > { key: "d", value: "x" }, > { key: "d", value: "e" }, > { key: "d", value: "e" }, > { key: "d", value: "e" } > ]; > > [Bindable] public var xx:ArrayCollection = new > ArrayCollection(); > > public function creationComplete():void { > var i:int; > xx.filterFunction = filter; > xx.addAll(new ArrayCollection(a)); > /*for (i = 0; i < a.length; i++) { > xx.addItem(a[i]); > }*/ > trace("Refresh is " + xx.refresh()); > xx.addAll(new ArrayCollection(b)); > /*for (i = 0; i < b.length; i++) { > xx.addItem(b[i]); > }*/ > trace("Refresh is " + xx.refresh()); > xx.addAll(new ArrayCollection(c)); > /*for (i = 0; i < c.length; i++) { > xx.addItem(c[i]); > }*/ > trace("Refresh is " + xx.refresh()); > } > > private function filter(item:*):Boolean { > if (item.value == "x") return false; > return true; > } > > ]]> > </mx:Script> > <mx:DataGrid id="dg" dataProvider="{xx}"></mx:DataGrid> > </mx:Application> > > When I compile and run I get: > > RangeError: Index '5' specified is out of bounds. > > What I'm doing basically is to add some random array of objects into an > ArrayCollection binded to the DataGrid. And because there is a filter > function associated with the ArrayCollection, I call refresh() every time > something is added. The original use case is that this is like a drop object > method for the datagrid, so it's possible for it to be called multiple times. > > I'm just curious why is this happening. Is this the desired behaviour? I'll > look into the source code later when I'm free, but this is just to get a > general feeling of the problem. >
