学步园

自定义带参数的事件应该明白：

        （1）自定义事件继承Event时的构造函数里面带参数。

        （2）同样需要触发系统事件，然后派发自定义事件。

        新建一个ActionScript Class，这个Class继承flash.events.Event。

TransferData.as类代码：

package  
{  
	import flash.events.Event;  
	
	public class TransferData extends Event  
	{  
		public static const CUSTOMEVENT:String = "customevent";  
		public var loginName:String;  
		public var password:String;  
		public function TransferData(type:String, loginName:String, password:String)  
		{  
			super(type);  
			this.loginName = loginName;  
			this.password = password;  
		}  
		override public function clone():Event{  
			return new TransferData(type,loginName,password);  
		}  
	}  
}  

然后创建component来设计并实现数据的传输和接受。

       DispatchData.mxml代码如下

<?xml version="1.0" encoding="utf-8"?>  
<s:Group xmlns:fx="http://ns.adobe.com/mxml/2009"   
		 xmlns:s="library://ns.adobe.com/flex/spark"   
		 xmlns:mx="library://ns.adobe.com/flex/mx"  
		 creationComplete="init()">  
	<fx:Metadata>  
		[Event(name="customevent",type="customEvent.TransferData")]  
	</fx:Metadata>  
	<fx:Declarations>  
		<!-- Place non-visual elements (e.g., services, value objects) here -->  
		<mx:Validator id="InputLoginName" source="{loginName}" property="text"/>  
		<mx:Validator id="InputPassword" source="{password}" property="text"/>  
	</fx:Declarations>  
	<fx:Script>  
		<![CDATA[  
			import mx.controls.Alert;  
			private function init():void{  
				dispatchData.addEventListener(MouseEvent.CLICK,clickHandle);  
			}  
			private function clickHandle(event:MouseEvent):void{  
				if(loginName.text != "" && password.text != ""){  
					canDispatchData();  
				}else{  
					Alert.show("Please input the content,contain login name and the password!");  
				}  
			}  
			private function canDispatchData():void{  
				var loginEvent:TransferData = new TransferData("customevent",loginName.text,password.text);  
				this.dispatchEvent(loginEvent);  
			}  
		]]>  
	</fx:Script>  
	<s:Panel x="0" y="0" width="300" height="200" title="The DataSource Panel">  
		<mx:Form x="10" y="10">  
			<mx:FormItem label="Login Name:" fontWeight="bold" required="true">  
				<s:TextInput id="loginName"/>  
			</mx:FormItem>  
			<mx:FormItem label="Password:" fontWeight="bold" required="true">  
				<s:TextInput id="password"/>  
			</mx:FormItem>  
			<s:Button label="DispatchData" id="dispatchData"/>  
		</mx:Form>  
	</s:Panel>  
</s:Group>  

  ReceiveData.mxml代码如下

<?xml version="1.0" encoding="utf-8"?>  
<s:Group xmlns:fx="http://ns.adobe.com/mxml/2009"   
		 xmlns:s="library://ns.adobe.com/flex/spark"   
		 xmlns:mx="library://ns.adobe.com/flex/mx">  
	<fx:Declarations>  
		<!-- Place non-visual elements (e.g., services, value objects) here -->  
	</fx:Declarations>  
	<s:Panel x="0" y="0" width="300" height="200" title="The DataReceive Panel">  
		<mx:Form x="10" y="10">  
			<mx:FormItem label="Login Name:" fontWeight="bold">  
				<s:TextInput id="loginName" editable="false"/>  
			</mx:FormItem>  
			<mx:FormItem label="Password:" fontWeight="bold">  
				<s:TextInput id="password" editable="false"/>  
			</mx:FormItem>  
			<s:Button label="ReceiveData" id="receiveData"/>  
		</mx:Form>  
	</s:Panel>  
</s:Group>  

 LoginEvent.mxml代码



<?xml version="1.0" encoding="utf-8"?>  
<s:Group xmlns:fx="http://ns.adobe.com/mxml/2009"   
		 xmlns:s="library://ns.adobe.com/flex/spark"   
		 xmlns:mx="library://ns.adobe.com/flex/mx"  
		 xmlns:component="*"  
		 creationComplete="init()"  
		 width="900" height="400"
		 >  
	<fx:Declarations>  
		<!-- Place non-visual elements (e.g., services, value objects) here -->  
	</fx:Declarations>  
	<fx:Script>  
		<![CDATA[  
			import mx.controls.Alert;  
			private var loginName:String;  
			private var password:String;  
			private function init():void{  
				dispatch.addEventListener(TransferData.CUSTOMEVENT,dispatchData);  
				receive.addEventListener(MouseEvent.CLICK,receiveData);  
			}  
			private function dispatchData(event:TransferData):void{  
				loginName = event.loginName;  
				password = event.password;  
				Alert.show("loginName:"+loginName+"\npassword:"+password);  
			}  
			private function receiveData(event:MouseEvent):void{  
				receive.loginName.text = loginName;  
				receive.password.text = password;  
			}  
		]]>  
	</fx:Script>  
	<component:DispatchData id="dispatch" x="100" y="100"/>  
	<component:ReceiveData id="receive" x="500" y="100"/>  
</s:Group>  

  在Flex工程主程序里面引入component即可

<?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"  
			   xmlns:component="*"  
			   minWidth="955" minHeight="600"  
			   horizontalCenter="0" verticalCenter="0">  
	<fx:Declarations>  
		<!-- Place non-visual elements (e.g., services, value objects) here -->  
	</fx:Declarations>  
	<s:Panel title="Show dispatch and receive data"  
			 horizontalCenter="0" verticalCenter="0">  
			<component:LoginEvent/>  
	</s:Panel>  
</s:Application>  

    界面如下：