flex event实例

EventArgExtend.as
package myeventhelper
{
public class EventArgExtend
{
public function EventArgExtend()
{
}
public static function create(f:Function,...arg):Function //addEventListener注册事件进行传递参数的方法
{ //EventArgExtend.create(comB.onGetParentTotal,this)
var F:Boolean = false; //让参数进行并且只一次合并
var _f:Function = function(e:*,..._arg)
{
_arg = arg;
if(!F)
{
F = true;
_arg.unshift(e); //向数组的开始部位加入
}
f.apply(null,_arg); //把参数都放到一个数组里,再传进去;
}
return _f;
}
public static function toString():String
{
return "Class JEventDelegate";
}
}
} 
MyEventDispatcher.as 自定义事件发送者类
package myeventhelper
{
import flash.events.EventDispatcher;

import mx.core.UIComponent;
//自定义事件触发类
public class MyEventDispatcher extends EventDispatcher
{
private static var _instance:MyEventDispatcher;
public static const EXEC_PARENT_METHOD:String="ExecParentMethod"; //执行Parent方法
public static function getInstance():MyEventDispatcher
{
if(_instance==null){
_instance=new MyEventDispatcher();
}
return _instance;
}
public var Source:UIComponent; //事件源对象
public var Parsms:Object; //主要用于参数传递
}
} 
MyExtendEvent.as 自定义event扩展类
package myeventhelper
{
import mx.events.FlexEvent;
//用户自定义事件类
public class MyExtendEvent extends FlexEvent
{
public static const EXEC_BROTHER_METHOD:String="ExecBrotherMethod";//执行兄弟方法

publ