Catch enter key press in input text field in AS3

Question

Hello,

I want to catch the enter key press when the user is filling an input text field in AS3. I think I have to do something like this:

    inputText.addEventListener(Event. ? , func);
    function func(e:Event):void{
       if(e. ? == "Enter"){
          doSomething();
       }
    }

But I can't find the best way to do this. By the way, the input text has a restriction:

inputText.restrict = "0-9";

Should I add the enter key to the restrictions?

inputText.restrict = "0-9\n";

Thanks in advance.

Answer 1

Are you using a textfield, or a TextInput?

The TextInput dispatches a Enter-event, when the enter is pressed. More on this can be found at http://livedocs.adobe.com/flash/9.0/ActionScriptLangRefV3/fl/controls/TextInput.html#event:enter

I'm not sure how this works for a Textfield.

Answer 2

I think that the only way to actually do what you want is a bit complex.

Basically, you can't get any event from the regular TextField that would be fired when the Enter key is pressed. You have to do work around...

One idea would be to listen the textfield for focus events. When it has focus, you add a listener to the stage for key board events and check if the pressed key is Enter, if so fire your action, else skip.

Sample code:

inputText.addEventListener(FocusEvent.FOCUS_IN,textInputHandler);
inputText.addEventListener(FocusEvent.FOCUS_OUT,textInputHandlerOut);

function textInputHandler(event:FocusEvent):void {
    //our textfield has focus, we want to listen for keyboard events.
    stage.addEventListener( KeyboardEvent.KEY_DOWN, keyDownHandler);
}

function textInputHandlerOut(event:FocusEvent):void {
    //our textfield lost focus, remove our listener.
    stage.removeEventListener( KeyboardEvent.KEY_DOWN, keyDownHandler);
}

function keyDownHandler( e:KeyboardEvent ):void{
    //a key was pressed, check if it was Enter => charCode 13.
    if( e.charCode == 13 ){
      //ok, enter was pressed. Do your thing.
      trace("We pressed enter, doSomething" )
    }
}

Answer 3

I am really new to AS, like to ask where and how to insert that code below?