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:
All rights reserved arcadiocarballares.com from Google