Accessing stage from non-Document class

programming flash
1

How would I got about doing this? I’ve got 3 classes, the document class(Main.as), the Main Menu Class (TitleScreen.as) and the gameplay class(GameScreen.as). I’m trying to add movement to the GameScreen.as class using eventListeners, but it’s just not working. I can’t for the life of me figure it out.

Here’s the GameScreen Class

package  
{
    import flash.display.MovieClip;
    import flash.ui.Keyboard;
    import flash.ui.Mouse;
    import flash.events.KeyboardEvent;
    import flash.events.Event;
    import flash.events.MouseEvent;
    
    public class GameScreen extends MovieClip
    { 
        public static const PAUSE:String = "pause";
        public static const WIN:String = "win";
        public static const LOSE:String = "lose";
        
        public var rightKey:Boolean = false;
        public var leftKey:Boolean = false;
        public var escKey:Boolean = false;
        
        public var movementX:int = 25;
        public var shipMC:Ship;
        
        public function GameScreen() 
        {
            this.addEventListener( KeyboardEvent.KEY_DOWN, keyPressed );
            this.addEventListener( KeyboardEvent.KEY_UP, keyReleased );
            trace("GameScreen")
            shipMC = new Ship();
            shipMC.x = 316;
            shipMC.y = 487;
            addChild( shipMC );

            this.addEventListener( Event.ENTER_FRAME, animate);
            this.addEventListener( MouseEvent.MOUSE_MOVE, crosshair );
        }
        
        public function keyPressed (e:KeyboardEvent):void
        {
            trace("testKey")
            switch (e.keyCode)
            {
                case Keyboard.LEFT:
                    leftKey = true;
                    break;
                case Keyboard.RIGHT:
                    rightKey = true;
                    break;
                case Keyboard.ESCAPE:
                    escKey = true;
                    break;
            }

        }
        
        public function keyReleased (e:KeyboardEvent):void
        {
            switch (e.keyCode)
            {
                case Keyboard.LEFT:
                    leftKey = false;
                    break;
                case Keyboard.RIGHT:
                    rightKey = false;
                    break;
                case Keyboard.ESCAPE:
                    escKey = false;
                    break;
            }
        }
        
        public function animate (e:Event)
        {
            if ( leftKey )
            {
                shipMC.x += -movementX;
                trace("left pressed")
            }
            if ( rightKey )
            {
                shipMC.x += movementX;
                trace("right pressed")
            }
            if (escKey)
            {
                trace("Game Pause")
            }
        }
        public function crosshair (e:Event):void
        {
            //mcCrosshair.gotoAndPlay(1);
            Mouse.hide();
            mcCrosshair.x = mouseX;
            mcCrosshair.y = mouseY;
        }
    }

}

Sorry if I’m not providing enough information. I’m fairly new to Actionscript. Any help is appreciated.

Thanks