flex 自定义事件

一般用法：

AppEvent.addListener("menu_selected",function(evt:AppEvent):void
                {
                    var data:Object=evt.data as Object; 
                    rightArea.removeAllElements();
                    var widget:Class=getDefinitionByName(data.widget as String) as Class;
                    widgets=new widget();
                    rightArea.addElement(widgets);
                }); 

AppEvent.dispatch("menu_selected",data);

自定义事件：

调用：

<component:ImageSwap id="mainImage" width="670" height="100%" preClick="mainImage_preClickHandler(event)"
nextClick="mainImage_nextClickHandler(event)"/>

声明：

实现：

this.dispatchEvent(new Event('imageLoaded'));

dispatchEvent(new MouseEvent("preClick"));

dispatchEvent(new MouseEvent("nextClick"));