How to inherit base class properties ?

Question

Hi All,
I have one doubt.Can anyone clear this doubt?
Steps:
1)I have created One movieClip & named as MyComp
2)I export this movieclip to actionscript.Class name for this movieclip is MyComp.
3)After that,Dynamically I have created 5 instance for this class & added to stage.
4)Now i need to change width of MyComp. it should reflect on previous 5 instance too.
I tried like,
I have created MyComp.as file in same location. There I tried to inherite DisplayObject properties Width.
Example :
In authoring time,I have one movieclip in my library which contains one rectangle shape..Im adding 5 instance of that movieclip in stage.
After that i get into one movieclip,and im increasing width of that movieclip by increasing Shape width. it ll get reflect in all instance..
i need this thing in actionscript.... is it possible?
Thanks...

Answer 1

you can't do what you are trying to do the way you are trying to do it.
I have included some code here (pure AS3, no timeline or library) which you might be able to adapt to your needs
Basically I have created a static property (_rectWidth which controls the rectangles width) on the MovieClip class that contains the rectangle and a render() function that redraws the rectangle tot he correct width. Note you will have to call render() after setting a new width to see the rectangle drawn at the new  width.
Then in the main class I create 5 rectangles with random colours and positions.
The main class also listens for the "arrow up" and "arrow down" keys to change the rectangle's size. Note: I change the size of the rectangle and then run through all of the Main classes children (which are all RectMC's) and call render();
package
          import flash.display.Sprite;
          import flash.events.Event;
          import flash.events.KeyboardEvent;
          public class Main extends Sprite
                    public function Main():void
                              if (stage) init();
                              else addEventListener(Event.ADDED_TO_STAGE, init);
                    private function init(e:Event = null):void
                              removeEventListener(Event.ADDED_TO_STAGE, init);
                              // entry point
                              for (var i:int = 0; i < 5; i++)
                                        var col:uint = Math.floor(Math.random() * 0xffffff);
                                        var rectX:int = Math.floor(Math.random() * stage.stageWidth);
                                        var rectY:int = Math.floor(Math.random() * stage.stageHeight);
                                        var rectMC:RectMC = new RectMC(col);
                                        rectMC.x = rectX;
                                        rectMC.y = rectY;
                                        addChild(rectMC);
                              stage.addEventListener(KeyboardEvent.KEY_DOWN, onKeyDown);
                    private function onKeyDown(e:KeyboardEvent):void
                              switch (e.keyCode)
                                        case 38:
                                                  RectMC.rectWidth += 20;
                                                  break;
                                        case 40:
                                                  RectMC.rectWidth -= 20;
                                                  break;
                              for (var i:int = 0; i < numChildren; i++)
                                        var rectMC:RectMC = getChildAt(i) as RectMC;
                                        rectMC.render();
package 
          import flash.display.MovieClip;
          import flash.events.Event;
           * @author steven O'Boyle
          public class RectMC extends MovieClip
                    protected static var _rectWidth:int = 100;
                    protected static var _rectHeight:int = 50;
                    protected var _rectColour:uint;
                    public function RectMC(col:uint)
                              _rectColour = col;
                              render();
                    public function render():void
                              graphics.clear();
                              graphics.beginFill(_rectColour);
                              graphics.drawRect(0, 0, _rectWidth, _rectHeight);
                              graphics.endFill();
                    public static function set rectWidth(value:int):void
                              _rectWidth = value;
                    public static function get rectWidth():int
                              return _rectWidth;