<?xml version="1.0" encoding="utf-8"?>
  <mx:Application xmlns:mx="http://www.adobe.com/2006/mxml" 
          creationComplete="initApp();" >
          
          <mx:Script>
                  <![CDATA[
                          //import com.example.programmingas3.errors.*;
                          
                          [Bindable]
                          public var employeeXML:XML;
                          
                          private function initApp():void 
                          {
                                  employeeXML =  <employee id="12345">
                                                         <firstName>John</firstName>
                                                         <lastName>Doe</lastName>
                                                         <costCenter>12345</costCenter>
                                                         <costCenter>67890</costCenter>
                                                      </employee>;
  
                                  statusText.text = "Click the Validate button to check the XML";
                      hideButtons();
                          }
                          
              public function validateData():void
              {
                  try
                  {
                      var tempXML:XML = XML(xmlText.text);
                      
                                          actionscript_book_CustomErrors_com_example_programmingas3_errors_Validator.validateEmployeeXML(tempXML);
                                          
                                          statusText.text = "The XML was successfully validated.";
                                  }
                                  catch (error:actionscript_book_CustomErrors_com_example_programmingas3_errors_FatalError)
                                  {
                                          showFatalError(error);
                                  }
                                  catch (error:actionscript_book_CustomErrors_com_example_programmingas3_errors_WarningError)
                                  {
                                          showWarningError(error);
                                  }
                                  catch (error:Error)
                                  {
                                          showGenericError(error);
                                  }
              }
              
                      public function showFatalError(error:actionscript_book_CustomErrors_com_example_programmingas3_errors_FatalError):void
                      {
                                  var message:String = error.message + "\n\n";
                                  var title:String = error.getTitle();
                                  statusText.text = message + " " + title + "\n\nThis application has ended.";
                                  this.xmlText.enabled = false;
                                  this.validateBtn.enabled = false;
                                  hideButtons();
                      }
                      
                      public function showWarningError(error:actionscript_book_CustomErrors_com_example_programmingas3_errors_WarningError):void
                      {
                                  var message:String = error.message + "\n\n" + "Do you want to exit this application?";
                                  showButtons();
                                  var title:String = error.getTitle();
                                  statusText.text = message;
                      }
                      
                      public function showGenericError(error:Error):void
                      {
                              statusText.text = error.message + "\n\nEncountered an unknown error: " + error.name;
                      }
                      
                      private function showButtons():void
                      {
                              yesButton.visible = true;
                              noButton.visible = true;
                      }
                      
                      private function hideButtons():void
                      {
                              yesButton.visible = false;
                              noButton.visible = false;
                      }
                      
                        private function closeHandler(event:MouseEvent):void 
                        {
                              switch (event.target)
                              {
                                      case yesButton:
                                              showFatalError(new actionscript_book_CustomErrors_com_example_programmingas3_errors_FatalError(9999));
                                              break;
                                      case noButton:
                                                   statusText.text = "";
                                                  hideButtons();
                                                     break;
                              }
                      }
                  ]]>
          </mx:Script>
          
          <mx:Label id="title" text="ApplicationError Example" fontSize="24" fontStyle="bold"/>
          <mx:Label id="subtitle" text="From Programming ActionScript 3.0, Chapter 8: Handling errors" fontSize="12"/>
          <mx:HBox width="100%">
                  <mx:VBox height="100%" horizontalAlign="center">
                          <mx:TextArea id="xmlText" text="{employeeXML}" width="250" height="200" fontSize="12"/>
                          <mx:Button id="validateBtn" width="100" label="Validate" click="validateData()"/>
                  </mx:VBox>
                  <mx:VBox height="100%" horizontalAlign="center">
                          <mx:TextArea id="statusText" width="250" height="200" fontSize="12"/>
                          <mx:HBox>
                                  <mx:Button id="yesButton" width="65" label="Yes" click="closeHandler(event)"/>
                                  <mx:Button id="noButton" width="65" label="No" click="closeHandler(event)"/>
                          </mx:HBox>
                  </mx:VBox>
          </mx:HBox>
  </mx:Application>