net/systemeD/potlatch2/Preloader.as

   1 package net.systemeD.potlatch2 {
   2     import flash.display.DisplayObject;
   3     import flash.display.GradientType;
   4     import flash.display.Sprite;
   5     import flash.display.Bitmap;
   6     import flash.display.BitmapData;
   7     import flash.filters.DropShadowFilter;
   8     import flash.geom.Matrix;
   9     import flash.text.TextField;
  10     import flash.text.TextFormat;
  11     import flash.events.TimerEvent;
  12     import flash.utils.Timer;
  13     import net.systemeD.halcyon.FileBank;
  14
  15     public class Preloader extends net.systemeD.potlatch2.PreloaderDisplayBase {
  16
  17         [Embed("../../../embedded/potlatch2logo.png") ] [Bindable] public var Preloader_Logo:Class;
  18         [Embed("../../../embedded/zebra.png") ] private var Preloader_Zebra:Class;
  19
  20         private var t:TextField;
  21         private var f:DropShadowFilter=new DropShadowFilter(2,45,0x000000,0.5)
  22         private var p2Logo:DisplayObject;
  23         private var bar:Sprite=new Sprite();
  24         private var barFrame:Sprite;
  25         private var mainColor:uint=0x045966;
  26         private var zebra:BitmapData;
  27         private var zebraTimer:Timer;
  28         private var offset:uint=0;
  29
  30         public function Preloader()
  31         {
  32             super();
  33         }
  34
  35         // This is called when the preloader has been created as a child on the stage.
  36         //  Put all real initialization here.
  37         override public function initialize():void
  38         {
  39             super.initialize();
  40
  41             clear();  // clear here, rather than in draw(), to speed up the drawing
  42
  43             var b:Bitmap=new Preloader_Zebra();
  44             zebra=new BitmapData(b.width,b.height); zebra.draw(b);
  45
  46             var indent:int = 20;
  47             var height:int = 20;
  48
  49             //creates all visual elements
  50             createAssets();
  51
  52                         // request .zip files
  53                         if (loaderInfo.parameters['assets']) {
  54                                 for each (var file:String in loaderInfo.parameters['assets'].split(';')) {
  55                                         var asset:Array=file.split('=');
  56                     if (asset.length == 1) {
  57                         FileBank.getInstance().addFromZip(asset[0]);
  58                     } else {
  59                         FileBank.getInstance().addFromZip(asset[0], asset[1]);
  60                     }
  61                                 }
  62                         }
  63         }
  64
  65         //this is our "animation" bit
  66                 override protected function draw():void {
  67                         if (_fractionLoaded==1) {
  68                                 if (zebraTimer) { return; }
  69                                 zebraTimer = new Timer(20);
  70                                 zebraTimer.addEventListener(TimerEvent.TIMER, zebraHandler);
  71                                 zebraTimer.start();
  72                                 t.text="Preparing...";
  73                         } else {
  74                                 //make objects below follow loading progress
  75                                 //positions are completely arbitrary
  76                                 //d tells us the x value of where the loading bar is at
  77                                 bar.graphics.beginFill(0xffffff,1)
  78                                 bar.graphics.drawRoundRectComplex(0,0,bar.width * _fractionLoaded,15,12,0,0,12);
  79                                 bar.graphics.endFill();
  80                                 t.text = int(_fractionLoaded*100).toString()+"%";
  81                         }
  82                         var d:Number=barFrame.x + barFrame.width * _fractionLoaded;
  83                         t.x = d - t.width - 5;
  84                 }
  85
  86                 private function zebraHandler(e:Event):void {
  87                         if (_IsInitComplete) {
  88                                 zebraTimer.stop();
  89                         } else {
  90                                 var matrix:Matrix=new Matrix();
  91                                 matrix.translate(offset,0);
  92                                 bar.graphics.beginBitmapFill(zebra,matrix);
  93                                 bar.graphics.drawRoundRectComplex(0,0,bar.width,15,12,0,0,12);
  94                                 bar.graphics.endFill();
  95                                 offset=(offset+1) % 25;
  96                         }
  97                 }
  98
  99         protected function createAssets():void
 100         {
 101             //create the logo
 102             p2Logo = new Preloader_Logo();
 103             p2Logo.y = stageHeight/2 - p2Logo.height/2;
 104             p2Logo.x = stageWidth/2 - p2Logo.width/2;
 105             //p2Logo.filters = [f];
 106             addChild(p2Logo);
 107
 108             //create bar
 109             bar = new Sprite();
 110              bar.graphics.drawRoundRectComplex(0,0,400,15,12,0,0,12);
 111             bar.x = stageWidth/2 - bar.width/2;
 112             bar.y = stageHeight/1.2 - bar.height/2;
 113             bar.filters = [f];
 114             addChild(bar);
 115
 116             //create bar frame
 117             barFrame = new Sprite();
 118             barFrame.graphics.lineStyle(2,0xFFFFFF,1)
 119             barFrame.graphics.drawRoundRectComplex(0,0,400,15,12,0,0,12);
 120             barFrame.graphics.endFill();
 121             barFrame.x = stageWidth/2 - barFrame.width/2;
 122             barFrame.y = stageHeight/1.2 - barFrame.height/2;
 123             barFrame.filters = [f];
 124             addChild(barFrame);
 125
 126             //create text field to show percentage of loading
 127             t = new TextField()
 128             t.y = barFrame.y-27;
 129             t.filters=[f];
 130             addChild(t);
 131             //we can format our text
 132             var s:TextFormat=new TextFormat("Verdana",null,0xFFFFFF,null,null,null,null,null,"right");
 133             t.defaultTextFormat=s;
 134         }
 135
 136         protected function clear():void
 137         {
 138             // Draw gradient background
 139             var b:Sprite = new Sprite;
 140              var matrix:Matrix =  new Matrix();
 141             matrix.createGradientBox(stageWidth, stageHeight, Math.PI/2);
 142             b.graphics.beginGradientFill(GradientType.LINEAR,
 143                                         [mainColor, mainColor],
 144                                         [1,1],
 145                                         [0,255],
 146                                         matrix
 147                                         );
 148             b.graphics.drawRect(0, 0, stageWidth, stageHeight);
 149             b.graphics.endFill();
 150             addChild(b);
 151         }
 152     }
 153
 154 }
 155