MACROMEDIA FLEX-GETTING STARTED WITH FLEX Manual do Utilizador descarregar pdf (Página 42)

Figure 3-6. The Button component in the Outline view

2. To

the Button component, add a click attribute with a

value of requestPhotos():

<mx:Button label="Search" click="requestPhotos()"/>

When a user clicks the button, it calls the requestPho

tos() handler, which initiates the HTTPService call.

3. Using the Outline view, locate the TextInput component

in the HBox component and add an id attribute with a

value of searchTerms. The instance name for the TextIn

put component is id, as shown here:

<mx:TextInput id="searchTerms"/>

4. In the mx:Script block, create a private function named

requestPhotos() with a return value of *void. This is the

function where the HTTPService call is initiated.

The relevant code appears in Example 3-7.

Example 3-7. The requestPhotos method

<mx:Script>

<![CDATA[

import mx.collections.ArrayCollection;

import mx.rpc.events.ResultEvent;

[Bindable]

private var photoFeed:ArrayCollection;

private function requestPhotos():void{

}

]]>

</mx:Script>

26 | Chapter 3: Flex 101: Step by Step

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MACROMEDIA FLEX-GETTING STARTED WITH FLEX Manual do Utilizador Página 42