topical media & game development

topical media & game development

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#graphic-flex-image-effects-05-Flex-DualImageTest.ax

#graphic-flex-image-effects-05-Flex-DualImageTest.ax [swf] [flash] flex


  package {
  
          import flash.display.Bitmap;
          import flash.display.BitmapData;
          import flash.display.Loader;
          import flash.display.LoaderInfo;
          import flash.display.Sprite;
          import flash.events.Event;
          import flash.geom.Point;
          import flash.net.URLRequest;

Loads two images and displays them side by side with space to the right for a third image. This is a base class that can be used to perform operations that require two images.


  
          public class @ax-graphic-flex-image-effects-05-Flex-DualImageTest extends Sprite {
  
                  private static const IMAGE_0:String = "graphic-flex-image-effects-05-assets-hydrant.jpg";
                  private static const IMAGE_1:String = "graphic-flex-image-effects-05-assets-fungus.jpg";
  
                  protected var _bitmap0:Bitmap;
                  protected var _bitmap1:Bitmap;
                  protected var _bitmapData0:BitmapData;
                  protected var _bitmapData1:BitmapData;

Constructor. Intiates load of first image.


  
                  public function @ax-graphic-flex-image-effects-05-Flex-DualImageTest() {
                          loadImage(IMAGE_0);
                  }

Loads the specified image.
parameter: imagePath The path to the image to load.


  
                  private function loadImage(imagePath:String):void {
                          var loader:Loader = new Loader();
                          loader.contentLoaderInfo.addEventListener(Event.COMPLETE, onImageLoaded);
                          loader.load(new URLRequest(imagePath));
                  }

Abstract method that is called once both images load. This should be overridden by child class.


  
                  protected function operateOnImages():void {}

Handler for when an image loads. This either kicks of load of the second image or calls operateOnImages() when both images have fully loaded.


  
                  private function onImageLoaded(event:Event):void {
                          var loaderInfo:LoaderInfo = event.target as LoaderInfo;
                          var bitmap:Bitmap = loaderInfo.content as Bitmap;
                          // add the image that just loaded to the stage
                          addChild(bitmap);
                          // if this is the first image, start loading the second image
                          if (numChildren == 1) {
                                  _bitmap0 = bitmap;
                                  _bitmapData0 = bitmap.bitmapData;
                                  loadImage(IMAGE_1);
                          // if this is the second image, position it to the right of the first image
                          // and call operateOnImages()
                          } else {
                                  _bitmap1 = bitmap;
                                  _bitmapData1 = bitmap.bitmapData;
                                  bitmap.x = _bitmap0.width;
                                  operateOnImages();
                          }
                  }
  
          }
  
  }

[] readme course(s) preface I 1 2 II 3 4 III 5 6 7 IV 8 9 10 V 11 12 afterthought(s) appendix reference(s) example(s) resource(s) _

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