CODEWITHSUNDEEP
actionscript-3functionkeylistenerevent-listener
starfox55
starfox55

Reputation: 25

Actionscript 3.0 Keyboard event listener doesn't implement the function

I have this keyboard event listener to listen for key_Down of letter A and D but I end up with and error:

1119: Access of possibly undefined property A through a reference with static type Class.

When I use 

function rotate(evt:KeyboardEvent):void
{
    if (evt.keyCode==68) {
    evt.currentTarget.rotation = 90 }
}

function unrotate(evt:KeyboardEvent):void
{
    if (evt.keyCode==65) {
    evt.currentTarget.rotation = 0 }
}

instead of (keyBoard.A and keyboard.D, I no longer get and error but the function that rotates the images doesn't work. Is it that it can't recognize the current target and implement the function or something else?

ti.border = true
ti.addEventListener(TextEvent.TEXT_INPUT, onInput);

function onInput(event:TextEvent):void {
  if(ti.text.search('a')!=-1) load_image("http://i54.tinypic.com/anom5d.png", "ottefct");
  else if(ti.text.search('b')!=-1) load_image("http://i53.tinypic.com/2dv7dao.png", "rnd");
  else if(ti.text.search('c')!=-1) load_image("http://i51.tinypic.com/m8jp7m.png", "ssd");
}

var loaded_images:Dictionary = new Dictionary();

function load_image(url:String, id_name:String)
{
  var loader:Loader = new Loader();
  loader.name = id_name;
  var url_req:URLRequest = new URLRequest(url);
  loader.contentLoaderInfo.addEventListener(Event.COMPLETE, onLoadingComplete);
  loader.load(url_req);
}

function onLoadingComplete(evt:Event):void
{
  var img_name:String = evt.currentTarget.loader.name
  var spr_box:Sprite = new Sprite();
  spr_box.addChild(evt.currentTarget.loader);

  spr_box.mouseChildren = false;
  spr_box.doubleClickEnabled = true;

  spr_box.addEventListener(MouseEvent.MOUSE_DOWN, drag);
  spr_box.addEventListener(MouseEvent.MOUSE_UP, drop);
  spr_box.addEventListener(KeyboardEvent.KEY_DOWN, rotate);
  spr_box.addEventListener(KeyboardEvent.KEY_DOWN, unrotate);

  spr_box.width = 124;
  spr_box.height = 180;
  spr_box.x = 430;
  spr_box.y = 425;


  this.addChild(spr_box);
  loaded_images[img_name] = spr_box;
}


function drag(evt:MouseEvent):void
{
  evt.currentTarget.startDrag()
}

function drop(evt:MouseEvent):void
{
  evt.currentTarget.stopDrag()
}

function rotate(evt:KeyboardEvent):void
{
  if (evt.keyCode==Keyboard.D) {
    evt.currentTarget.rotation = 90 
  }
}

function unrotate(evt:KeyboardEvent):void
{
  if (evt.keyCode==Keyboard.A) {
    evt.currentTarget.rotation = 0 
  }
}

Upvotes: 0

Views: 516

Answers (3)

Tareq Rahman
Tareq Rahman

Reputation: 61

When you click on the object, it select its current Target. But when you press key code, how can it selects its target? You must define its instance name when you press a key code.

Upvotes: 0

average Joe
average Joe

Reputation: 4595

or even better using Fingers

on(stage).keyDown += rotate + unrotate;

Have in mind, that you have to change evt.currentTarget in your listeners, so it points to an instance of DisplayObject you want to rotate.

What's more, it would be clearer to have one stage_keyDownHandler instead of rotate and unrotate:

 stage_keyDownHandler(evt:KeyboardEvent):void
 {
      if (evt.keyCode == Keyboard.D) {
          yourObjToRotate.rotation = 90 
      }
      else if (evt.keyCode == Keyboard.A) {
          yourObjToRotate.rotation = 0 
      }
 }

Upvotes: 0

locrizak
locrizak

Reputation: 12281

You need to attach the KeyBoardEvent to the stage not an object

stage.addEventListener(KeyboardEvent.KEY_DOWN, rotate);
stage.addEventListener(KeyboardEvent.KEY_DOWN, unrotate);

Upvotes: 1

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