Actionscript/Flex 3 - Right Click Context Menu

//MXML
<?xml version="1.0" encoding="utf-8"?>
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml" layout="vertical" xmlns:ns1="*" creationComplete="init()">
	<mx:Script>
		<![CDATA[
			import mx.controls.Alert;
			import mx.collections.SortField;
			import mx.collections.Sort;
			import mx.collections.ArrayCollection;
			
			[Bindable]
			private var ac:ArrayCollection = new ArrayCollection([
			new SimpleClass("a",3,6),
			new SimpleClass("a",3,6),
			new SimpleClass("a",3,6),
			new SimpleClass("a",3,6),
			new SimpleClass("a",3,6),
			new SimpleClass("b",5,8),
			new SimpleClass("b",5,8),
			new SimpleClass("b",5,8),
			new SimpleClass("c",1,9),
			new SimpleClass("c",1,9),
			new SimpleClass("c",1,9),
			new SimpleClass("d",2,5),
			new SimpleClass("d",2,5),
			
			]);
			[Bindable]
			private var acg:ArrayCollection = new ArrayCollection();
			
			private function init(){
				var cm:ContextMenu = new ContextMenu();
				cm.hideBuiltInItems();
				var item:ContextMenuItem = new ContextMenuItem("Create Copy");
            	cm.customItems.push(item);
            	item.addEventListener(ContextMenuEvent.MENU_ITEM_SELECT, onSelectItem);
            	dg.contextMenu = cm;
 
			}
			private function onSelectItem(e:ContextMenuEvent):void{
				if(dg.selectedIndex >= 0){
					var copyItem:SimpleClass = SimpleClass(dg.selectedItem).clone();
					copyItem.title = "Copy -" + copyItem.title;
					ac.addItem(copyItem);
				}else{
					Alert.show("Select an item to copy","ATTENTION");
				}
			}
 
			
		]]>
	</mx:Script>
	<!-- THIS IS THE EDITABLE DG -->
	<mx:DataGrid id="dg" dataProvider="{ac}" editable="true">
		<mx:columns>
			<mx:DataGridColumn dataField="title" editable="false" />
			<mx:DataGridColumn dataField="value1" editorDataField="value" >
				<mx:itemEditor>
					<mx:Component>
						<mx:NumericStepper minimum="2" maximum="25" />
					</mx:Component>
				</mx:itemEditor>
			</mx:DataGridColumn>
			<mx:DataGridColumn dataField="value2" editorDataField="value">
				<mx:itemEditor>
					<mx:Component>
						<mx:NumericStepper minimum="2" maximum="25" />
					</mx:Component>
				</mx:itemEditor>
			</mx:DataGridColumn>
		</mx:columns>
	</mx:DataGrid>
	
	
</mx:Application>
 
 
//SimpleClass.as
 
package
{
	public class SimpleClass
	{
			[Bindable]
			private var _title:String = "";
			[Bindable]
			private var _v1:int = 0;
			[Bindable]
			private var _v2:int = 0;
			
			
			
			public function SimpleClass(tit:String = "", v1:int = 0,v2:int = 0){
				value1 = v1;
				value2 = v2;
				title = tit;			
			}
			
			[Bindable]
			public function get value1():int{
				return _v1;
			}
			public function set value1(v:int):void{
				_v1 = v;
			}
			[Bindable]
			public function get value2():int{
				return _v2;
			}
			public function set value2(v:int):void{
				_v2 = v;
			}
			[Bindable]
			public function get title():String{
				return _title;
			}
			public function set title(v:String):void{
				_title = v;
				
			}			
			public function clone():SimpleClass{
				return new SimpleClass(title,value1,value2);
			}
			
	}
}
                                              

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