| //////////////////////////////////////////////////////////////////////////////// |
| // |
| // 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 mx.binding |
| { |
| |
| import mx.collections.CursorBookmark; |
| import mx.collections.ICollectionView; |
| import mx.collections.IViewCursor; |
| import mx.core.mx_internal; |
| import mx.events.CollectionEvent; |
| |
| use namespace mx_internal; |
| |
| [ExcludeClass] |
| |
| /** |
| * @private |
| */ |
| public class RepeaterItemWatcher extends Watcher |
| { |
| include "../core/Version.as"; |
| |
| //-------------------------------------------------------------------------- |
| // |
| // Constructor |
| // |
| //-------------------------------------------------------------------------- |
| |
| /** |
| * @private |
| * Constructor. |
| */ |
| public function RepeaterItemWatcher(dataProviderWatcher:PropertyWatcher) |
| { |
| super(); |
| |
| this.dataProviderWatcher = dataProviderWatcher; |
| } |
| |
| //-------------------------------------------------------------------------- |
| // |
| // Properties |
| // |
| //-------------------------------------------------------------------------- |
| |
| /** |
| * @private |
| */ |
| private var dataProviderWatcher:PropertyWatcher; |
| |
| /** |
| * @private |
| */ |
| private var clones:Array; |
| |
| /** |
| * @private |
| */ |
| private var original:Boolean = true; |
| |
| //-------------------------------------------------------------------------- |
| // |
| // Overridden methods: Watcher |
| // |
| //-------------------------------------------------------------------------- |
| |
| /** |
| * @private |
| */ |
| override public function updateParent(parent:Object):void |
| { |
| var dataProvider:ICollectionView; |
| |
| if (dataProviderWatcher) |
| { |
| dataProvider = ICollectionView(dataProviderWatcher.value); |
| if (dataProvider != null) |
| { |
| dataProvider.removeEventListener(CollectionEvent.COLLECTION_CHANGE, changedHandler, false); |
| } |
| } |
| |
| dataProviderWatcher = PropertyWatcher(parent); |
| dataProvider = ICollectionView(dataProviderWatcher.value); |
| |
| if (dataProvider) |
| { |
| if (original) |
| { |
| dataProvider.addEventListener(CollectionEvent.COLLECTION_CHANGE, changedHandler, false, 0, true); |
| updateClones(dataProvider); |
| } |
| else |
| { |
| wrapUpdate(function():void |
| { |
| var iterator:IViewCursor = dataProvider.createCursor(); |
| iterator.seek(CursorBookmark.FIRST, cloneIndex); |
| value = iterator.current; |
| updateChildren(); |
| }); |
| } |
| } |
| } |
| |
| /** |
| * @private |
| * Handles "Change" events sent by calls to Collection APIs |
| * on the Repeater's dataProvider. |
| */ |
| private function changedHandler(collectionEvent:CollectionEvent):void |
| { |
| var dataProvider:ICollectionView = ICollectionView(dataProviderWatcher.value); |
| |
| if (dataProvider) |
| updateClones(dataProvider); |
| } |
| |
| /** |
| * @private |
| */ |
| override protected function shallowClone():Watcher |
| { |
| return new RepeaterItemWatcher(dataProviderWatcher); |
| } |
| |
| /** |
| * @private |
| */ |
| private function updateClones(dataProvider:ICollectionView):void |
| { |
| if (clones) |
| clones = clones.splice(0, dataProvider.length); |
| else |
| clones = []; |
| |
| for (var i:int = 0; i < dataProvider.length; i++) |
| { |
| var clone:RepeaterItemWatcher = RepeaterItemWatcher(clones[i]); |
| |
| if (!clone) |
| { |
| clone = RepeaterItemWatcher(deepClone(i)); |
| clone.original = false; |
| clones[i] = clone; |
| } |
| |
| clone.updateParent(dataProviderWatcher); |
| } |
| } |
| } |
| |
| } |