| //////////////////////////////////////////////////////////////////////////////// |
| // |
| // Licensed to the Apache Software Foundation (ASF) under one or more |
| // contributor license agreements. See the NOTICE file distributed with |
| // this work for additional information regarding copyright ownership. |
| // The ASF licenses this file to You under the Apache License, Version 2.0 |
| // (the "License"); you may not use this file except in compliance with |
| // the License. You may obtain a copy of the License at |
| // |
| // http://www.apache.org/licenses/LICENSE-2.0 |
| // |
| // Unless required by applicable law or agreed to in writing, software |
| // distributed under the License is distributed on an "AS IS" BASIS, |
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| // See the License for the specific language governing permissions and |
| // limitations under the License. |
| // |
| //////////////////////////////////////////////////////////////////////////////// |
| package renderers |
| { |
| import flash.events.Event; |
| |
| import mx.events.FlexEvent; |
| |
| import spark.components.IItemRenderer; |
| import spark.components.IconItemRenderer; |
| import spark.primitives.BitmapImage; |
| |
| /** |
| * A very simple subclass of BitmapImage that fires an event when the |
| * icon is finished loading, whether that image is being loaded in or |
| * coming from a cache. |
| * |
| * Designed for use in Mustella in a subclass of IconItemRenderer. Set |
| * the iconDisplayClass property in your renderers constructor to enable |
| * this functionality. |
| * |
| * This fires an event of the form "itemRenderer0IconReady" against the |
| * owner of the item renderer. |
| */ |
| public class InstrumentedBitmapImage extends BitmapImage |
| { |
| public function InstrumentedBitmapImage() |
| { |
| super(); |
| // listen for when the image is changing |
| addEventListener(FlexEvent.READY, fireIconReady); |
| } |
| |
| /** |
| * Fire an event against the owner of the renderer |
| */ |
| private function fireIconReady(e:Event):void |
| { |
| var parentItemRenderer:IconItemRenderer = parent as IconItemRenderer; |
| var itemIndex:Number = parentItemRenderer.itemIndex; |
| |
| var iconReadyEventString:String = "itemRenderer" + itemIndex; |
| |
| if (source != parentItemRenderer.iconPlaceholder) |
| iconReadyEventString += "IconReady"; |
| else |
| iconReadyEventString += "IconPlaceholderReady"; |
| |
| trace(iconReadyEventString); |
| parentItemRenderer.owner.dispatchEvent(new Event(iconReadyEventString)); |
| |
| } |
| } |
| } |