add a MOUSE_UP event listener to the stage from a class??

[mgason]

Hi,
in my class I am trying to add a MOUSE_UP event listener to the stage.
How can I do this?

Thanks, Mark

//when I do this in the main constructor of my class
Stage.addEventListener(MouseEvent.MOUSE_UP, h_draggable_mouseUp);

//I get the error
1061: Call to a possibly undefined method addEventListener through a reference with static type Class.
Stage.addEventListener(MouseEvent.MOUSE_UP, h_draggable_mouseUp); 

[moagrius]

in AS3 it's "stage" not "Stage", and it's a property - so it won't exist unless it's on the display list. If that class is a document class, which has access to it's stage property, you're OK as it is - if it's not, and you will be instantiating this class, you'll need to do that in an addedToStage event listener, e.g.,

private function setupStageListener(event:Event):void{
stage.addEventListener("mouseUp",h_draggable_mouseUp);
removeEventListener("addedToStage",arguments.callee);
}
addEventListener("addedToStage",setupStageListener); 

[mgason]

Hi,
thanks for the reply.
I may need a bit more help. A bit out of my actionscript depth.
The class is not the document class.
I added this to the class constructor

 addEventListener("addedToStage",setupStageListener); 

then I added this function to the class

    private function setupStageListener(event:Event):void{ 
        stage.addEventListener("mouseUp",h_draggable_mouseUp); 
        removeEventListener("addedToStage",arguments.called);
    } 

in my mouse up function I put a trace

    private function h_draggable_mouseUp(evt:Event):void {
    trace("MOUSE UP");
      dragTarget = null;
    } 

I do not see the trace.
Thanks again
Mark

[moagrius]

is the class a display object, and did you add it to the stage? the addedToStage event won't fire until the object is in the display list. if it's not a display object, then it won't have a stage property, so you'll have to pass it that property somehow...

[mgason]

I have 3 classes.
PpGraphics
PpObject
and Main which is my document class.

In main I have

public class Main extends PpGraphics {
    
    private var A:PpObject,B:PpObject,C:PpObject,D:PpObject,E:PpObject; 

I am guessing, sorry I am out of my depth, that PpGraphics is not a display object, but PpObject is.
You can see all the code I started with here
http://www.kynd.info/library/mathand...dotProduct_01/

I am trying to add the event listener for mouse up from "protected function enableDrag" to the stage so that it works outside the dot mc's, as I have added several more and restricted their movement.

mark

[moagrius]

ppObject extends Point - not a display object
ppGraphic extends Sprite - which is a display object
Main extends ppGraphic - which is a display object

Since main is your document class, you can access it's stage property directly and immediately:

// add this to the constructor
stage.addEventListener("mouseUp",h_draggable_mouseUp); 

[mgason]

I added that to the main class
last thing in the constructor.
Was that all I had to add? No other code anywhere?

My constructor in main now looks like this

    public function Main() {

      origin(stage.stageWidth / 2,stage.stageHeight / 2);
      A = new PpObject(100,0);
      B = new PpObject(0,150);
      C = new PpObject(-200,0);
      D = new PpObject(0,-150);
      E = new PpObject(0,0);

      circle(A,8,C_DRAGGABLE, "A");//draw circle -- (point var, radius, C_DRAGGABLE is a color, label text);
      circle(B,8,C_DRAGGABLE, "B");
      circle(C,8,C_DRAGGABLE, "C");
      circle(D,8,C_DRAGGABLE, "D");
      circle(E,8,C_DRAGGABLE, "E");
      
      path(A,B, C_MOVABLE);//draw line -- path(point 1, point 2, C_MOVABLE is a color);
      path(B,C, C_MOVABLE);
      path(C,D, C_MOVABLE);
      path(D,A, C_MOVABLE);
      path(A,C, C_MOVABLE);
      path(B,D, C_MOVABLE);

      enableDrag(A,B,C,D,E);

     // add this to the constructor
    stage.addEventListener("mouseUp",h_draggable_mouseUp);
    } 

it throws this error in reference to that line in main.as
1178: Attempted access of inaccessible property h_draggable_mouseUp through a reference with static type Main.

[Awoogamuffin]

That last error means that you haven't defined a function called h_draggable_mouseUp(). Where is that function?

[mgason]

Hi,
that function is in a class called PpGraphics.
My document class Main.as extends PpGraphics which extends Sprite.

your question gave me the clue
changed h_draggable_mouseUp() from private function to protected function.
works now

thanks everyone.
Mark