alternativa-editor-mod/src/PropListPanel.mxml

<?xml version="1.0" encoding="utf-8"?>
<mx:Panel xmlns:mx="library://ns.adobe.com/flex/mx"
        xmlns:fx="http://ns.adobe.com/mxml/2009"
          title="Props"
          width="100%" height="100%"
          focusEnabled="false">

    <fx:Script>
        <![CDATA[
            import mx.collections.ArrayCollection;
            import mx.containers.Canvas;
            import mx.containers.Accordion;
            import mx.controls.TileList;
            import mx.core.ClassFactory;
            import mx.core.ScrollPolicy;
            import mx.events.ListEvent;
            import gui.events.PropListEvent;
            import alternativa.editor.ImageItemRenderer;
            
            private var _groupName:Array = [];
            private var _group:Array = [];
            private var dataProviders:Array = [];
            public var selectedItem:* = null;

            public function addProp(groupName:String, label:String, image:DisplayObject, obj:* = null):void {
                var canvas:Canvas;
                var dataProvider:ArrayCollection;
                var tileList:TileList;
                var groupIndex:int = _groupName.indexOf(groupName);
                
                if (groupIndex >= 0) {
                    dataProvider = dataProviders[groupIndex];
                } else {
                    canvas = new Canvas();
                    canvas.label = groupName;
                    canvas.autoLayout = true;
                    canvas.percentHeight = canvas.percentWidth = 100;
                    canvas.horizontalScrollPolicy = ScrollPolicy.OFF;
                    accordion.addChild(canvas);
                    
                    tileList = new TileList();
                    tileList.percentHeight = tileList.percentWidth = 100;
                    tileList.focusEnabled = false;
                    dataProvider = new ArrayCollection();
                    dataProviders.push(dataProvider);
                    tileList.dataProvider = dataProvider;
                    tileList.itemRenderer = new ClassFactory(ImageItemRenderer);
                    tileList.addEventListener(ListEvent.ITEM_CLICK, changeSelected);
                    _group.push(tileList);
                    _groupName.push(groupName);
                    canvas.addChild(tileList);
                }

                var sprite:Sprite = new Sprite();
                sprite.addChild(image);
                dataProvider.addItem({
                    "label": label,
                    "image": sprite,
                    "obj": obj
                });
            }

            public function deleteAllProps():void {
                var tileList:TileList;
                for (var i:int = 0; i < _group.length; i++) {
                    tileList = _group[i] as TileList;
                    tileList.removeEventListener(ListEvent.ITEM_CLICK, changeSelected);
                }
                while (accordion.numChildren > 0) {
                    accordion.removeChildAt(0);
                }
                dataProviders = [];
                _group = [];
                _groupName = [];
            }

            private function changeSelected(event:ListEvent):void {
                dispatchEvent(new PropListEvent(0, event.itemRenderer.data.obj));
                selectedItem = event.itemRenderer.data.obj;
            }
        ]]>
    </fx:Script>

    <!-- Accordion -->
    <mx:Accordion id="accordion" percentWidth="100" percentHeight="100"/>

</mx:Panel>