package 
  {
          //import com.example.programmingas3.filterWorkbench.IFilterFactory;
          
          import flash.events.Event;
          import flash.events.EventDispatcher;
          import flash.filters.BitmapFilter;
          import flash.filters.BlurFilter;
          
          // ------- Events -------
          [Event(name="change", type="flash.events.Event")]
          
          
          public class @ax-actionscript-book-FilterWorkbench-com-example-programmingas3-filterWorkbench-BlurFactory extends EventDispatcher implements actionscript_book_FilterWorkbench_com_example_programmingas3_filterWorkbench_IFilterFactory
          {
                  // ------- Private vars -------
                  private var _filter:BlurFilter;
                  private var _paramString:String;
                  
                  
                  // ------- Constructor -------
                  public function @ax-actionscript-book-FilterWorkbench-com-example-programmingas3-filterWorkbench-BlurFactory(blurX:Number = 4, blurY:Number = 4, quality:int = 1)
                  {
                          _filter = new BlurFilter(blurX, blurY, quality);
                          _paramString = buildParamString(blurX, blurY, quality);
                  }
                  
                  
                  // ------- IFilterFactory implementation -------
                  public function getFilter():BitmapFilter
                  {
                          return _filter;
                  }
                  
                  
                  public function getCode():String
                  {
                          var result:String = "";
                          result += "import flash.filters.BitmapFilterQuality;\n";
                          result += "import flash.filters.BlurFilter;\n";
                          result += "\n";
                          result += "var blur:BlurFilter;\n";
                          result += "blur = new BlurFilter(" + _paramString + ");\n";
                          result += "\n";
                          result += "myDisplayObject.filters = [blur];";
                          return result;
                  }
                  
                  
                  // ------- Public methods -------
                  public function modifyFilter(blurX:Number = 4, 
                                                                             blurY:Number = 4, 
                                                                             quality:int = 1):void
                  {
                          _filter = new BlurFilter(blurX, blurY, quality);
                          _paramString = buildParamString(blurX, blurY, quality);
                          dispatchEvent(new Event(Event.CHANGE));
                  }
                  
                  
                  // ------- Private methods -------
                  private function buildParamString(blurX:Number, blurY:Number, quality:int):String
                  {
                          var result:String = "\n\t\t\t" + blurX.toString() + ",\n\t\t\t" + blurY.toString() + ",\n\t\t\t";
                          
                          switch (quality)
                          {
                                  case 1:
                                          result += "BitmapFilterQuality.LOW";
                                          break;
                                  case 2:
                                          result += "BitmapFilterQuality.MEDIUM";
                                          break;
                                  case 3:
                                          result += "BitmapFilterQuality.HIGH";
                                          break;
                          }
                          
                          return result;
                  }
          }
  }