class/System.Windows/System.Windows.Automation.Peers/ToggleButtonAutomationPeer.cs

   1 /*
   2  * ToggleButtonAutomationPeer.cs.
   3  *
   4  * Contact:
   5  *   Moonlight List (moonlight-list@lists.ximian.com)
   6  *
   7  * Copyright 2009 Novell, Inc. (http://www.novell.com)
   8  *
   9  * See the LICENSE file included with the distribution for details.
  10  *
  11  */
  12
  13 using System;
  14 using System.Windows.Automation;
  15 using System.Windows.Automation.Provider;
  16 using System.Windows.Controls;
  17 using System.Windows.Controls.Primitives;
  18
  19 namespace System.Windows.Automation.Peers
  20 {
  21         public class ToggleButtonAutomationPeer : ButtonBaseAutomationPeer, IToggleProvider
  22         {
  23                 public ToggleButtonAutomationPeer (ToggleButton owner)
  24                         : base (owner)
  25                 {
  26                         this.owner = owner;
  27
  28                         // UIA Event TogglePatternIdentifiers.ToggleStateProperty
  29                         // raised by ToggleButton.OnIsCheckedPropertyChanged().
  30                         toggleState = ToggleState;
  31                 }
  32
  33                 public override object GetPattern (PatternInterface patternInterface)
  34                 {
  35                         if (patternInterface == PatternInterface.Toggle)
  36                                 return this;
  37                         return base.GetPattern (patternInterface);
  38                 }
  39
  40                 protected override string GetClassNameCore ()
  41                 {
  42                         return "Button";
  43                 }
  44
  45                 protected override AutomationControlType GetAutomationControlTypeCore ()
  46                 {
  47                         return AutomationControlType.Button;
  48                 }
  49
  50                 #region IToggleProvider implementation
  51
  52                 void IToggleProvider.Toggle ()
  53                 {
  54                         if (!owner.IsEnabled)
  55                                 throw new ElementNotEnabledException ();
  56
  57                         bool? isChecked = owner.IsChecked;
  58                         if (isChecked == true)
  59                                 owner.IsChecked = owner.IsThreeState ? null : ((bool?) false);
  60                         else
  61                                 owner.IsChecked = (bool?) isChecked.HasValue;
  62                 }
  63
  64                 ToggleState IToggleProvider.ToggleState {
  65                         get { return ToggleState; }
  66                 }
  67
  68                 #endregion
  69
  70                 internal virtual void RaiseToggleStateChanged ()
  71                 {
  72                         RaisePropertyChangedEvent (TogglePatternIdentifiers.ToggleStateProperty,
  73                                                    toggleState,
  74                                                    ToggleState);
  75                         toggleState = ToggleState;
  76                 }
  77
  78                 private ToggleState ToggleState {
  79                         get {
  80                                 bool? isChecked = owner.IsChecked;
  81                                 if (isChecked.HasValue)
  82                                         return (isChecked == true) ? ToggleState.On : ToggleState.Off;
  83                                 return ToggleState.Indeterminate;
  84                         }
  85                 }
  86
  87                 private ToggleButton owner;
  88                 private ToggleState toggleState;
  89         }
  90 }