Dispatch keyUp events to the keyHandler() event listener function

        

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<!-- events/KeyboardEventPrecedence.mxml -->
<s:Application xmlns:fx="http://ns.adobe.com/mxml/2009" xmlns:mx="library://ns.adobe.com/flex/mx"
    xmlns:s="library://ns.adobe.com/flex/spark" creationComplete="initApp();" width="650">
    <s:layout>
        <s:VerticalLayout />
    </s:layout>
    <fx:Script> 
        import mx.core.FlexGlobals; 
        private function initApp():void { 
            FlexGlobals.topLevelApplication.addEventListener(KeyboardEvent.KEY_UP, keyHandler); 
            my_vgroup.addEventListener(KeyboardEvent.KEY_UP, keyHandler); 
            my_textinput.addEventListener(KeyboardEvent.KEY_UP, keyHandler); 
            // Set the focus somewhere inside the application. 
            my_textinput.setFocus(); 
        } 
        private function keyHandler(event:KeyboardEvent):void { 
            ta1.text += event.target + "(" + event.currentTarget + "): " + 
            event.keyCode + "/" + event.charCode + "\n"; 
        } 
      </fx:Script>
    <s:VGroup id="my_vgroup">
        <s:TextInput id="my_textinput" />
    </s:VGroup>
    <s:TextArea id="ta1" height="300" width="550" />
</s:Application>

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Dispatch keyUp events to the keyHandler() event listener function : Key Event « Event « Flex

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