flex容易添加右键功能

flex简单添加右键功能
private var newBuildMenuItem: ContextMenuItem; 

  
   internal function createMenu(): void{
       treeMenu();
   
        } 
  
private function treeMenu(): void{ 
createTreeMenuItem(); 
myTree.contextMenu = getTreeContxtMenu(); 
} 
 
public function createTreeMenuItem(): void{ 
newBuildMenuItem = new ContextMenuItem("定位");
newBuildMenuItem.addEventListener(ContextMenuEvent.MENU_ITEM_SELECT, showMouseEvent); 
} 
              
private function getTreeContxtMenu(): ContextMenu{ 
var contextMenu: ContextMenu = new ContextMenu(); 
contextMenu.hideBuiltInItems();
contextMenu.customItems.push(newBuildMenuItem); 
return contextMenu; 
}