MACROMEDIA COLDFUSION MX 7.0.2-USING COLDFUSION MX WITH FLEX 2 Guida Utente Scaricare il pdf (Pagina 182)

182 Create a Custom Component

6. Enter the following code in the CDATA construct:

private function handleLoginEvent():void {

lblTest.text = "logging in...";

//login logic

}

In a real application, the handleLoginEvent function would reference or contain the

logic for validating and submitting the login entries for authentication. Developing the

logic for the handler is outside the scope of this lesson.

The keyword

private specifies the function’s scope. In this case, the function is available

only within the component. If you set the scope to

public, the function is available

throughout your code.

The keyword

void specifies the function’s return type. All ActionScript functions should

specify a return type. The

handleLoginEvent function returns no value.

The code for the component should look as follows:

<?xml version="1.0" encoding="utf-8"?>

<mx:Panel xmlns:mx="http://www.adobe.com/2006/mxml" layout="absolute"

width="275" height="150" title="Member Login">

<mx:Script>

<![CDATA[

private function handleLoginEvent():void {

lblTest.text = "logging in...";

//login logic

}

]]>

</mx:Script>

<mx:Label x="10" y="12" text="Username"/>

<mx:Label x="10" y="42" text="Password"/>

<mx:TextInput x="74" y="10" id="txtUID"/>

<mx:TextInput x="74" y="40" id="txtPwd" displayAsPassword="true"/>

<mx:Button x="178" y="70" label="Login" click="handleLoginEvent()"/>

<mx:Label x="74" y="72" id="lblTest"/>

</mx:Panel>

Save the file.

Use the custom component

The next step is to add the custom component to your MXML application file, and then to

compile and run the application file to test the component.

1. In Design mode, switch to the Main.mxml file.

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MACROMEDIA COLDFUSION MX 7.0.2-USING COLDFUSION MX WITH FLEX 2 Guida Utente Pagina 182