By: Michael Boucher

I converted an AS2 script I found for positioning full-screen, centered flash web sites to AS3. Couple of things changed and there was one instance where I got stumped because of syntax/function differences.

This stemmed from a thread over on Ultrashock.com. The thread is a great resource is if you looking to do any sort of full-screen and/or centered flash web sites. Thread also covers tiled backgrounds in Flash 8.

Note that this file is saved as CenterAlign.as and set as the Document Class in your Flash CS3 FLA file.

Shout goes to Nutrox at Ultrashock.com for the lesson in Bitwise Operators.

 
package
{     
 
  import flash.display.Sprite;
  import flash.display.StageAlign;
  import flash.display.StageScaleMode;
  import flash.events.Event;    
 
  import InterfaceContainer;     
 
  public class CenterAlign extends Sprite
  {     
 
    public var XI:InterfaceContainer;     
 
    public function CenterAlign()
    {     
 
      // --------- Set Stage Properties ----------     
 
      stage.scaleMode = StageScaleMode.NO_SCALE;
      stage.align = StageAlign.TOP_LEFT;     
 
      // --------- Listen for Stage Resize -------
      stage.addEventListener(Event.RESIZE,RepositionInterface);     
 
      XI = new InterfaceContainer();
      addChild(XI);     
 
      RepositionInterface();     
 
    }     
 
    // Aligns Interface to Center of Stage
    public function RepositionInterface(e:Event=null):void
    {     
 
      var newX = (stage.stageWidth - XI.width) >> 1;
      var newY = (stage.stageHeight - XI.height) >> 1;
      XI.x = newX;
      XI.y = newY;     
 
    }     
 
  }     
 
}