// Copyright 2007. Adobe Systems Incorporated. All Rights Reserved.
  package fl.accessibility {
          
          import fl.controls.Button;
          import fl.core.UIComponent;
          
          

The @ax-student-ar-fl-accessibility-ButtonAccImpl class, also called the Button Accessibility Implementation class, enables communication between a Button component and a screen reader. Screen readers are used to translate screen content into synthesized speech or braille for visually impaired users. <p>The @ax-student-ar-fl-accessibility-ButtonAccImpl class supports system roles, object-based events, and states.</p> <p>A Button reports the role <code>ROLE_SYSTEM_PUSHBUTTON</code> (0x2B) to a screen reader.</p> <p>A Button reports the following states to a screen reader:</p> <ul> <li><code>STATE_SYSTEM_NORMAL</code> (0x00000000)</li> <li><code>STATE_SYSTEM_UNAVAILABLE</code> (0x00000001)</li> <li><code>STATE_SYSTEM_FOCUSED</code> (0x00000004)</li> <li><code>STATE_SYSTEM_PRESSED</code> (0x00000008)</li> <li><code>STATE_SYSTEM_FOCUSABLE</code> (0x00100000)</li> </ul> <p>A Button dispatches the following events to a screen reader:</p> <ul> <li><code>EVENT_OBJECT_STATECHANGE</code> (0x800A)</li> <li><code>EVENT_OBJECT_NAMECHANGE</code> (0x800C)</li> </ul> <p>The user of a screen reader can activate a button component by using the spacebar or the Enter key.</p>
see: fl.controls.Button Button @langversion 3.0 @playerversion Flash 9.0.28.0

  
          public class @ax-student-ar-fl-accessibility-ButtonAccImpl extends Label@ax-student-ar-fl-accessibility-ButtonAccImpl {
                  

@private Static variable triggering the <code>hookAccessibility()</code> method. This is used for initializing @ax-student-ar-fl-accessibility-ButtonAccImpl class to hook its <code>createAccessibilityImplementation()</code> method to Button class before it gets called from UIComponent. @langversion 3.0 @playerversion Flash 9.0.28.0

  
                  private static var accessibilityHooked:Boolean = hookAccessibility();
          
                  

@private Static method for swapping the <code>createAccessibilityImplementation()</code> method of Button with the @ax-student-ar-fl-accessibility-ButtonAccImpl class. @langversion 3.0 @playerversion Flash 9.0.28.0

  
                  private static function hookAccessibility():Boolean {
                          Button.createAccessibilityImplementation = createAccessibilityImplementation;
                          return true;
                  }
          
                  //--------------------------------------------------------------------------
                  //  Class methods
                  //--------------------------------------------------------------------------
          
                  

@private Method for creating the Accessibility class. This method is called from UIComponent.
parameter: component The UIComponent instance that this AccImpl instance is making accessible. @langversion 3.0 @playerversion Flash 9.0.28.0

  
                  public static function createAccessibilityImplementation(component:UIComponent):void {
                          component.accessibilityImplementation = new @ax-student-ar-fl-accessibility-ButtonAccImpl(component);
                  }
          
                  

Enables accessibility for a Button component. This method is required for the compiler to activate the accessibility classes for a component. @langversion 3.0 @playerversion Flash 9.0.28.0

  
                  public static function enableAccessibility():void {
                  }
          
                  //--------------------------------------------------------------------------
                  //  Constructor
                  //--------------------------------------------------------------------------
          
          

@private @internal Nivesh says: I don't think we should document the constructors for the accessibility classes. End-users just have to call the static enableAccessibility method. They don't really create an instance of the classes. Creates a @ax-student-ar-fl-accessibility-ButtonAccImpl instance for the specified Button component.
parameter: component The Button instance that this @ax-student-ar-fl-accessibility-ButtonAccImpl instance makes accessible. @langversion 3.0 @playerversion Flash 9.0.28.0

  
                  public function @ax-student-ar-fl-accessibility-ButtonAccImpl(component:UIComponent) {
                          super(component);
                          role = 0x2B;
                  }
          }
  }
  

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[] readme course(s) preface I 1 2 II 3 4 III 5 6 7 IV 8 9 10 V 11 12 afterthought(s) appendix reference(s) example(s) resource(s) _

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(C) Æliens 27/08/2009

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