1. ComboCheck.as
/* * ComboCheck * v1.2.6 * Arcadio Carballares Martín, 2009 * http://www.carballares.es/arcadio */ package com.arcadiocarballares { import flash.events.Event; import flash.events.MouseEvent; import mx.collections.ArrayCollection; import mx.controls.Alert; import mx.controls.ComboBox; import mx.controls.listClasses.ListBase; import mx.core.ClassFactory; import mx.events.CollectionEvent; import mx.events.FlexEvent; [Event(name="addItem", type="flash.events.Event")] [Event(name="itemsCreated", type="flash.events.Event")] [Event(name="selectAll", type="flash.events.Event")] [Event(name="deSelectAll", type="flash.events.Event")] public class ComboCheck extends ComboBox { public var itemAllValue:int=-1; private const ITEM_ALL_POSITION_DEFAULT:int=-1000; private var itemAllPosition:int=ITEM_ALL_POSITION_DEFAULT; private var _selectedItems:ArrayCollection; [Bindable("change")] [Bindable("valueCommit")] [Bindable("collectionChange")] public function set selectedItems(value:ArrayCollection):void { _selectedItems=value; } public function get selectedItems():ArrayCollection { return _selectedItems; } public function ComboCheck() { super(); addEventListener("comboChecked", onComboChecked); addEventListener(FlexEvent.CREATION_COMPLETE, onCreationComplete); addEventListener(Event.CLOSE, onDropDownInit); } private function onCreationComplete(event:Event):void { dropdown.addEventListener(FlexEvent.CREATION_COMPLETE, onDropDownComplete); } override public function set dataProvider(value:Object):void { super.dataProvider = value; // Set selecAll position for (var i:int;i<dataProvider.length;i++) { if (dataProvider[i].value == itemAllValue) { itemAllPosition=i; break; } } } override protected function commitProperties():void { super.commitProperties(); var render:ClassFactory = new ClassFactory(ComboCheckItemRenderer); super.itemRenderer=render; var myDropDownFactory:ClassFactory = new ClassFactory(ComboCheckDropDownFactory); super.dropdownFactory=myDropDownFactory; selectedItems=new ArrayCollection(); for each (var item:Object in dataProvider) { var index:int=selectedItems.getItemIndex(item); if (item.assigned==true) { if (index==-1) { selectedItems.addItem(item); } } else { if (index!=-1) { selectedItems.removeItemAt(index); } } } setText() dispatchEvent(new Event("itemsCreated")); trace ("commit properties!"); } private function onDropDownInit(event:Event):void { invalidateProperties(); } private function onDropDownComplete(event:Event):void { trace ("dropdown complete!"); } private function onComboChecked(event:ComboCheckEvent):void { var obj:Object=event.obj; var index:int=selectedItems.getItemIndex(obj); if (index==-1) { selectedItems.addItem(obj); if (obj.value == itemAllValue) { dispatchEvent(new Event("selectAll")); } else { if (selectedItems.length == dataProvider.length - 1) { selecCheckboxAll(true); } } } else { selectedItems.removeItemAt(index); if (obj.value == itemAllValue) { dispatchEvent(new Event("deSelectAll")); } else { selecCheckboxAll(false); } } setText(); dispatchEvent(new Event("valueCommit")); dispatchEvent(new Event("addItem")); } private function setText():void { if (selectedItems.length>1) { textInput.text='multiple' } if (selectedItems.length==1) { textInput.text=selectedItems.getItemAt(0)[labelField]; } if (selectedItems.length<1) { textInput.text=''; } } private function selecCheckboxAll(value:Boolean):void { var item:ComboCheckItemRenderer; if (itemAllPosition!=ITEM_ALL_POSITION_DEFAULT) { item=ComboCheckItemRenderer(ListBase(dropdown).indexToItemRenderer(itemAllPosition)); if (value) { item.dispatchEvent(new MouseEvent(MouseEvent.CLICK)); } else { var index:int=selectedItems.getItemIndex(item.data); if (index!=-1) { selectedItems.removeItemAt(index); } item.selected = false; item.data.assigned = false; } } } } }
2. ComboCheckDropDownFactory.as
package com.arcadiocarballares { import flash.events.Event; import flash.events.MouseEvent; import mx.controls.ComboBox; import mx.controls.List; import mx.controls.listClasses.*; public class ComboCheckDropDownFactory extends List { private var index:int=0; public function ComboCheckDropDownFactory(): void { addEventListener("comboChecked", onComboChecked); } override protected function mouseOverHandler(event:MouseEvent):void { event.preventDefault(); event.stopImmediatePropagation(); } override protected function mouseEventToItemRenderer(event:MouseEvent):IListItemRenderer { var row:IListItemRenderer = super.mouseEventToItemRenderer(event); if (row!=null) { index=itemRendererToIndex(row); } return null; } override protected function scrollHandler(event:Event):void { super.scrollHandler(event); refreshComboCheck(); } override protected function scrollVertically(pos:int, deltaPos:int, scrollUp:Boolean):void { super.scrollVertically(pos,deltaPos,scrollUp); refreshComboCheck(); } private function refreshComboCheck():void { ComboBox(owner).invalidateProperties(); } private function onComboChecked (event:ComboCheckEvent):void { var myComboCheckEvent:ComboCheckEvent=new ComboCheckEvent(ComboCheckEvent.COMBO_CHECKED); myComboCheckEvent.obj=ComboCheckEvent(event).obj; owner.dispatchEvent(myComboCheckEvent); } } }
3. ComboCheckEvent.as
package com.arcadiocarballares { import flash.events.Event; public class ComboCheckEvent extends Event { public static const COMBO_CHECKED:String = "comboChecked"; public var obj:Object=new Object(); public function ComboCheckEvent(type:String, bubbles:Boolean=false, cancelable:Boolean=false) { super(type, bubbles, cancelable); } } }
4. ComboCheckItemRenderer
package com.arcadiocarballares { import flash.events.Event; import flash.events.MouseEvent; import mx.controls.Alert; import mx.controls.CheckBox; import mx.events.FlexEvent; public class ComboCheckItemRenderer extends CheckBox { public function ComboCheckItemRenderer() { super(); addEventListener(FlexEvent.CREATION_COMPLETE, onCreationComplete); addEventListener(MouseEvent.CLICK,onClick); } override public function set data(value:Object):void { if (value != null) { super.data = value; if (value.tooltip!=null) { toolTip = value.tooltip; } } } private function onCreationComplete(event:Event=null):void { if (data!= null && data.assigned==true) { selected=true; } } private function onClick(event:MouseEvent):void { data.assigned=selected; var myComboCheckEvent:ComboCheckEvent=new ComboCheckEvent(ComboCheckEvent.COMBO_CHECKED); myComboCheckEvent.obj=data; owner.dispatchEvent(myComboCheckEvent); } } }
5. Test.mxml
<?xml version="1.0" encoding="utf-8"?> <s:Application xmlns:fx="http://ns.adobe.com/mxml/2009" xmlns:s="library://ns.adobe.com/flex/spark" xmlns:mx="library://ns.adobe.com/flex/mx" minWidth="955" minHeight="600" initialize="application1_initializeHandler(event)" xmlns:view="view.*"> <fx:Script> <![CDATA[ import mx.collections.ArrayCollection; import mx.controls.Alert; import mx.events.FlexEvent; [Bindable] private var cobList:ArrayCollection = new ArrayCollection(); protected function application1_initializeHandler(event:FlexEvent):void { cobList.addItem({label:"AAA", data:"AAA", assigned:true}); cobList.addItem({label:"BBB", data:"BBB", assigned:true}); cobList.addItem({label:"CCC", data:"CCC", assigned:true}); } protected function button1_clickHandler(event:MouseEvent):void { var selectedItemList:ArrayCollection = comboCheck.selectedItems; for each (var o:Object in selectedItemList){ Alert.show(o.label + " = " + o.data + ", assigned: " + o.assigned); } } ]]> </fx:Script> <mx:VBox> <view:ComboCheck id="comboCheck" dataProvider="{cobList}" /> <s:Button click="button1_clickHandler(event)" label="check"/> </mx:VBox> </s:Application>
Declaration:
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