package 
  {
          //import com.example.programmingas3.filterWorkbench.FilterWorkbenchController;
          //import com.example.programmingas3.filterWorkbench.IFilterPanel;
          //import com.example.programmingas3.filterWorkbench.ImageType;
          
          import flash.display.DisplayObject;
          import flash.events.Event;
          import flash.events.ProgressEvent;
          
          //import flexapp.filterPanels.BevelPanel;
          //import flexapp.filterPanels.BlurPanel;
          //import flexapp.filterPanels.ColorMatrixPanel;
          //import flexapp.filterPanels.ConvolutionPanel;
          //import flexapp.filterPanels.DropShadowPanel;
          //import flexapp.filterPanels.GlowPanel;
          //import flexapp.filterPanels.GradientBevelPanel;
          //import flexapp.filterPanels.GradientGlowPanel;
          
          import mx.collections.ArrayCollection;
          import mx.containers.Canvas;
          import mx.controls.Button;
          import mx.controls.ComboBox;
          import mx.controls.TextArea;
          import mx.core.Application;
          import mx.events.FlexEvent;
          import mx.events.ListEvent;
  
          public class @ax-actionscript-book-FilterWorkbench-flexapp-FilterWorkbench extends Application
          {
                  // ------- Constants -------
                  // --- Filter types ---
                  private static const BEVEL:String = "bevel";
                  private static const BLUR:String = "blur";
                  private static const COLOR_MATRIX:String = "colorMatrix";
                  private static const CONVOLUTION:String = "convolution";
                  private static const DROP_SHADOW:String = "dropShadow";
                  private static const GLOW:String = "glow";
                  private static const GRADIENT_BEVEL:String = "gradientBevel";
                  private static const GRADIENT_GLOW:String = "gradientGlow";
                  
                  private static const INSTRUCTIONS_TEXT:String = "Select a filter and the corresponding\nActionScript code will appear here.\n\nClick \"Apply filter and add another\"\nto see the effect of multiple filters\napplied in combination.";
                  
                  
                  // ------- Child Controls -------
                  // Positioned and created within @ax-actionscript-book-FilterWorkbench-flexapp-FilterWorkbench.mxml
                  public var filterPicker:ComboBox;
                  public var filterTargetPicker:ComboBox;
                  public var applyFilterBtn:Button;
                  public var imageContainer:actionscript_book_FilterWorkbench_flexapp_ImageContainer;
                  public var codeDisplay:TextArea;
                  public var filterFormContainer:Canvas;
                  
                  // Filter panels
                  private var _bevelPanel:actionscript_book_FilterWorkbench_flexapp_filterPanels_BevelPanel;
                  private var _blurPanel:actionscript_book_FilterWorkbench_flexapp_filterPanels_BlurPanel;
                  private var _colorMatrixPanel:actionscript_book_FilterWorkbench_flexapp_filterPanels_ColorMatrixPanel;
                  private var _convolutionPanel:actionscript_book_FilterWorkbench_flexapp_filterPanels_ConvolutionPanel;
                  private var _dropShadowPanel:actionscript_book_FilterWorkbench_flexapp_filterPanels_DropShadowPanel;
                  private var _glowPanel:actionscript_book_FilterWorkbench_flexapp_filterPanels_GlowPanel;
                  private var _gradientBevelPanel:actionscript_book_FilterWorkbench_flexapp_filterPanels_GradientBevelPanel;
                  private var _gradientGlowPanel:actionscript_book_FilterWorkbench_flexapp_filterPanels_GradientGlowPanel;
                  
                  // Controller
                  private var _controller:actionscript_book_FilterWorkbench_com_example_programmingas3_filterWorkbench_FilterWorkbenchController;
  
                  
                  // ------- Constructor -------
                  public function @ax-actionscript-book-FilterWorkbench-flexapp-FilterWorkbench()
                  {
                          addEventListener(FlexEvent.CREATION_COMPLETE, setupChildren);
                  }
          
          
                  // ------- Event handling -------
                  private function setupChildren(event:FlexEvent):void
                  {
                          removeEventListener(FlexEvent.CREATION_COMPLETE, setupChildren);
                          
                          // instantiate the filter panels
                          _bevelPanel = new actionscript_book_FilterWorkbench_flexapp_filterPanels_BevelPanel();
                          _blurPanel = new actionscript_book_FilterWorkbench_flexapp_filterPanels_BlurPanel();
                          _colorMatrixPanel = new actionscript_book_FilterWorkbench_flexapp_filterPanels_ColorMatrixPanel();
                          _convolutionPanel = new actionscript_book_FilterWorkbench_flexapp_filterPanels_ConvolutionPanel();
                          _dropShadowPanel = new actionscript_book_FilterWorkbench_flexapp_filterPanels_DropShadowPanel();
                          _glowPanel  = new actionscript_book_FilterWorkbench_flexapp_filterPanels_GlowPanel();
                          _gradientBevelPanel = new actionscript_book_FilterWorkbench_flexapp_filterPanels_GradientBevelPanel();
                          _gradientGlowPanel = new actionscript_book_FilterWorkbench_flexapp_filterPanels_GradientGlowPanel();
                          
                          // set up data and events for the controls
                          var filterList:ArrayCollection = new ArrayCollection();
                          filterList.addItem({label:"< None >", data:null});
                          filterList.addItem({label:"Bevel", data:BEVEL});
                          filterList.addItem({label:"Blur", data:BLUR});
                          filterList.addItem({label:"Color matrix", data:COLOR_MATRIX});
                          filterList.addItem({label:"Convolution", data:CONVOLUTION});
                          filterList.addItem({label:"Drop shadow", data:DROP_SHADOW});
                          filterList.addItem({label:"Glow", data:GLOW});
                          filterList.addItem({label:"Gradient bevel", data:GRADIENT_BEVEL});
                          filterList.addItem({label:"Gradient glow", data:GRADIENT_GLOW});
                          filterPicker.dataProvider = filterList;
                          filterPicker.rowCount = 9;
                          
                          filterPicker.addEventListener(ListEvent.CHANGE, setFilter);
                          
                          var imageList:ArrayCollection = new ArrayCollection(actionscript_book_FilterWorkbench_com_example_programmingas3_filterWorkbench_ImageType.getImageTypes());
                          filterTargetPicker.labelField = "name";
                          filterTargetPicker.dataProvider = imageList;
                          filterTargetPicker.selectedIndex = 0;
                          
                          filterTargetPicker.addEventListener(ListEvent.CHANGE, setImage);
                          
                          applyFilterBtn.enabled = false;
                          applyFilterBtn.addEventListener(FlexEvent.BUTTON_DOWN, applyFilter);
                          
                          codeDisplay.text = INSTRUCTIONS_TEXT;
                          
                          // create the controller for the app
                          _controller = new actionscript_book_FilterWorkbench_com_example_programmingas3_filterWorkbench_FilterWorkbenchController();
                          _controller.addEventListener(ProgressEvent.PROGRESS, imageLoadProgress);
                          _controller.addEventListener(Event.COMPLETE, imageLoadComplete);
                          _controller.addEventListener(Event.CHANGE, updateCode);
                          
                          // load the first image
                          _controller.setFilterTarget(filterTargetPicker.selectedItem as actionscript_book_FilterWorkbench_com_example_programmingas3_filterWorkbench_ImageType);
                  }
                  
                  
                  private function setFilter(event:ListEvent):void
                  {
                          setupSelectedFilter();
                  }
                  
                  
                  private function setImage(event:ListEvent):void
                  {
                          var imageType:actionscript_book_FilterWorkbench_com_example_programmingas3_filterWorkbench_ImageType = filterTargetPicker.selectedItem as actionscript_book_FilterWorkbench_com_example_programmingas3_filterWorkbench_ImageType;
                          
                          if (imageType == null) { return; }
                          
                          // remove the previous image
                          if (imageContainer.numChildren > 0)
                          {
                                  while (imageContainer.hasImage)
                                  {
                                          imageContainer.removeImage();
                                  }
                          }
                          
                          // Show a progress indicator
                          //CursorManager.setBusyCursor();
                          
                          _controller.setFilterTarget(imageType);
                          
                          resetForm();
                  }
                  
                  
                  private function applyFilter(event:FlexEvent):void
                  {
                          if (filterPicker.selectedIndex > 0)
                          {
                                  _controller.applyFilter();
                                  resetForm();
                          }
                  }
                  
                  
                  private function updateCode(event:Event):void
                  {
                          codeDisplay.text = _controller.getCode();
                  }
                  
                  
                  private function imageLoadProgress(event:ProgressEvent):void
                  {
                          // update the progress bar
                  }
                  
                  
                  private function imageLoadComplete(event:Event):void
                  {
                          // clear away the progress bar and display the image
                          //CursorManager.removeBusyCursor();
                          
                          var image:DisplayObject = _controller.getFilterTarget();
                          imageContainer.addImage(image);
                  }
                  
                  
                  // ------- Private methods -------
                  private function resetForm():void
                  {
                          filterPicker.selectedIndex = 0;
                          hideFilterForm();
                          applyFilterBtn.enabled = false;
                  }
                  
                  
                  private function hideFilterForm():void
                  {
                          if (filterFormContainer.numChildren > 0)
                          {
                                  filterFormContainer.removeChildAt(0);
                          }
                  }
                  
                  
                  private function setupSelectedFilter():void
                  {
                          hideFilterForm();
                          
                          if (filterPicker.selectedIndex <= 0)
                          {
                                  applyFilterBtn.enabled = false;
                                  _controller.setFilter(null);
                                  return;
                          }
                          
                          applyFilterBtn.enabled = true;
                          
                          var filterPanel:actionscript_book_FilterWorkbench_com_example_programmingas3_filterWorkbench_IFilterPanel;
                          
                          switch (filterPicker.selectedItem.data)
                          {
                                  case BEVEL:
                                          filterPanel = _bevelPanel;
                                          break;
                                  case BLUR:
                                          filterPanel = _blurPanel;
                                          break;
                                  case COLOR_MATRIX:
                                          filterPanel = _colorMatrixPanel;
                                          break;
                                  case CONVOLUTION:
                                          filterPanel = _convolutionPanel;
                                          break;
                                  case DROP_SHADOW:
                                          filterPanel = _dropShadowPanel;
                                          break;
                                  case GLOW:
                                          filterPanel = _glowPanel;
                                          break;
                                  case GRADIENT_BEVEL:
                                          filterPanel = _gradientBevelPanel;
                                          break;
                                  case GRADIENT_GLOW:
                                          filterPanel = _gradientGlowPanel;
                                          break;
                          }
                          
                          var panelDO:DisplayObject;
                          if ((panelDO = filterPanel as DisplayObject) != null)
                          {
                                  filterFormContainer.addChild(panelDO);
                          }
                          filterPanel.resetForm();
                          _controller.setFilter(filterPanel.filterFactory);
                  }
          }
  }