src/Preloader.as

   1 package
   2 {
   3         import flash.display.DisplayObject;
   4         import flash.display.MovieClip;
   5         import flash.display.StageAlign;
   6         import flash.display.StageScaleMode;
   7         import flash.events.Event;
   8         import flash.events.IOErrorEvent;
   9         import flash.events.ProgressEvent;
  10         import flash.text.TextField;
  11         import flash.text.TextFormat;
  12         import flash.text.TextFormatAlign;
  13         import flash.utils.getDefinitionByName;
  14
  15         /**
  16          * ...
  17          * @author Rob
  18          */
  19         public class Preloader extends MovieClip
  20         {
  21                 private var txtLoading:TextField;
  22                 public function Preloader()
  23                 {
  24                         if (stage) {
  25                                 stage.scaleMode = StageScaleMode.NO_SCALE;
  26                                 stage.align = StageAlign.TOP_LEFT;
  27                                 txtLoading = new TextField();
  28                                 txtLoading.text = "LOADING: 0%";
  29                                 addChild(txtLoading);
  30                                 txtLoading.width = stage.stageWidth;
  31                                 txtLoading.height = stage.stageHeight;
  32                                 var tf:TextFormat = new TextFormat();
  33                                 tf.font = "Arial";
  34                                 tf.size = "22";
  35                                 tf.align = TextFormatAlign.CENTER;
  36                                 txtLoading.setTextFormat(tf);
  37                         }
  38                         addEventListener(Event.ENTER_FRAME, checkFrame);
  39                         loaderInfo.addEventListener(ProgressEvent.PROGRESS, progress);
  40                         loaderInfo.addEventListener(IOErrorEvent.IO_ERROR, ioError);
  41
  42                         // TODO show loader
  43                 }
  44
  45                 private function ioError(e:IOErrorEvent):void
  46                 {
  47                         trace(e.text);
  48                 }
  49
  50                 private function progress(e:ProgressEvent):void
  51                 {
  52                         txtLoading.text = "LOADING: " + ((e.bytesLoaded / e.bytesTotal) * 100) + "%";
  53                 }
  54
  55                 private function checkFrame(e:Event):void
  56                 {
  57                         if (currentFrame == totalFrames)
  58                         {
  59                                 stop();
  60                                 loadingFinished();
  61                         }
  62                 }
  63
  64                 private function loadingFinished():void
  65                 {
  66                         removeEventListener(Event.ENTER_FRAME, checkFrame);
  67                         loaderInfo.removeEventListener(ProgressEvent.PROGRESS, progress);
  68                         loaderInfo.removeEventListener(IOErrorEvent.IO_ERROR, ioError);
  69
  70                         removeChild(txtLoading);
  71
  72                         startup();
  73                 }
  74
  75                 private function startup():void
  76                 {
  77                         var mainClass:Class = getDefinitionByName("Main") as Class;
  78                         addChild(new mainClass() as DisplayObject);
  79                 }
  80
  81         }
  82
  83 }