SplitButton: added click event and Commanding support.

ExtendedWPFToolkitSolution/Src/WPFToolkit.Extended/SplitButton/SplitButton.cs

@@ -3,13 +3,14 @@ using System.Windows;
 using System.Windows.Controls;
 using System.Windows.Input;
 using System.Windows.Controls.Primitives;
+using System.ComponentModel;
 
 namespace Microsoft.Windows.Controls
 {
-    public class SplitButton : ContentControl
+    public class SplitButton : ContentControl, ICommandSource
     {
         #region Members
-
+        Button _actionButton;
         ToggleButton _toggleButton;
         Popup _popup;
 
@@ -51,7 +52,7 @@ namespace Microsoft.Windows.Controls
         protected virtual void OnDropDownContentChanged(object oldValue, object newValue)
         {
             // TODO: Add your property changed side-effects. Descendants can override as well.
-        }        
+        }
 
         #endregion //DropDownContent
 
@@ -80,31 +81,44 @@ namespace Microsoft.Windows.Controls
 
         #endregion //Properties
 
+        #region Events
+
+        public static readonly RoutedEvent ClickEvent = EventManager.RegisterRoutedEvent("Click", RoutingStrategy.Bubble, typeof(RoutedEventHandler), typeof(SplitButton));
+        public event RoutedEventHandler Click
+        {
+            add { AddHandler(ClickEvent, value); }
+            remove { RemoveHandler(ClickEvent, value); }
+        }
+
+        #endregion //Events
+
         #region Base Class Overrides
 
         public override void OnApplyTemplate()
         {
             base.OnApplyTemplate();
 
+            _actionButton = (Button)GetTemplateChild("PART_ActionButton");
+            _actionButton.Click += ActionButton_Click;
+
             _toggleButton = (ToggleButton)GetTemplateChild("PART_ToggleButton");
-            _toggleButton.Click += ToggleButton_Click;      
-            
+
             _popup = (Popup)GetTemplateChild("PART_Popup");
-            _popup.Opened += Popup_Opened;
+            //_popup.Opened += Popup_Opened;
         }
 
         #endregion //Base Class Overrides
 
         #region Event Handlers
 
-        void ToggleButton_Click(object sender, RoutedEventArgs e)
+        void ActionButton_Click(object sender, RoutedEventArgs e)
         {
-
+            OnClick();
         }
 
         void Popup_Opened(object sender, EventArgs e)
         {
-            
+
         }
 
         private void OnKeyDown(object sender, KeyEventArgs e)
@@ -112,7 +126,6 @@ namespace Microsoft.Windows.Controls
             switch (e.Key)
             {
                 case Key.Escape:
-                case Key.Tab:
                     {
                         CloseDropDown();
                         break;
@@ -125,10 +138,88 @@ namespace Microsoft.Windows.Controls
             CloseDropDown();
         }
 
+        void CanExecuteChanged(object sender, EventArgs e)
+        {
+            if (Command != null)
+            {
+                RoutedCommand command = Command as RoutedCommand;
+
+                // If a RoutedCommand.
+                if (command != null)
+                    IsEnabled = command.CanExecute(CommandParameter, CommandTarget) ? true : false;
+                // If a not RoutedCommand.
+                else
+                    IsEnabled = Command.CanExecute(CommandParameter) ? true : false;
+            }
+        }
+
         #endregion //Event Handlers
 
         #region Methods
 
+        #region Protected
+
+        protected virtual void OnClick()
+        {
+            RaiseClickEvent();
+            RaiseCommand();
+        }
+        #endregion //Protected
+
+        #region Private
+
+        /// <summary>
+        /// Raises the click event.
+        /// </summary>
+        private void RaiseClickEvent()
+        {
+            RoutedEventArgs args = new RoutedEventArgs(SplitButton.ClickEvent, this);
+            RaiseEvent(args);
+        }
+
+        /// <summary>
+        /// Raises the command's Execute event.
+        /// </summary>
+        private void RaiseCommand()
+        {
+            if (Command != null)
+            {
+                RoutedCommand routedCommand = Command as RoutedCommand;
+
+                if (routedCommand == null)
+                    ((ICommand)Command).Execute(CommandParameter);
+                else
+                    routedCommand.Execute(CommandParameter, CommandTarget);
+            }
+        }
+
+        /// <summary>
+        /// Unhooks a command from the Command property.
+        /// </summary>
+        /// <param name="oldCommand">The old command.</param>
+        /// <param name="newCommand">The new command.</param>
+        private void UnhookCommand(ICommand oldCommand, ICommand newCommand)
+        {
+            EventHandler handler = CanExecuteChanged;
+            oldCommand.CanExecuteChanged -= handler;
+        }
+
+        /// <summary>
+        /// Hooks up a command to the CanExecuteChnaged event handler.
+        /// </summary>
+        /// <param name="oldCommand">The old command.</param>
+        /// <param name="newCommand">The new command.</param>
+        private void HookUpCommand(ICommand oldCommand, ICommand newCommand)
+        {
+            EventHandler handler = new EventHandler(CanExecuteChanged);
+            canExecuteChangedHandler = handler;
+            if (newCommand != null)
+                newCommand.CanExecuteChanged += canExecuteChangedHandler;
+        }
+
+        /// <summary>
+        /// Closes the drop down.
+        /// </summary>
         private void CloseDropDown()
         {
             if (IsOpen)
@@ -136,6 +227,57 @@ namespace Microsoft.Windows.Controls
             ReleaseMouseCapture();
         }
 
+        #endregion //Private
+
         #endregion //Methods
+
+        #region ICommandSource Members
+
+        // Keeps a copy of the CanExecuteChnaged handler so it doesn't get garbage collected.
+        private static EventHandler canExecuteChangedHandler;
+
+        #region Command
+
+        public static readonly DependencyProperty CommandProperty = DependencyProperty.Register("Command", typeof(ICommand), typeof(SplitButton), new PropertyMetadata((ICommand)null, OnCommandChanged));
+        [TypeConverter(typeof(CommandConverter))]
+        public ICommand Command
+        {
+            get { return (ICommand)GetValue(CommandProperty); }
+            set { SetValue(CommandProperty, value); }
+        }
+
+        private static void OnCommandChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
+        {
+            SplitButton splitButton = d as SplitButton;
+            if (splitButton != null)
+                splitButton.OnCommandChanged((ICommand)e.OldValue, (ICommand)e.NewValue);
+        }
+
+        protected virtual void OnCommandChanged(ICommand oldValue, ICommand newValue)
+        {
+            // If old command is not null, then we need to remove the handlers.
+            if (oldValue != null)
+                UnhookCommand(oldValue, newValue);
+
+            HookUpCommand(oldValue, newValue);
+        }
+
+        #endregion //Command
+
+        public static readonly DependencyProperty CommandParameterProperty = DependencyProperty.Register("CommandParameter", typeof(object), typeof(SplitButton), new PropertyMetadata(null));
+        public object CommandParameter
+        {
+            get { return GetValue(CommandParameterProperty); }
+            set { SetValue(CommandParameterProperty, value); }
+        }
+
+        public static readonly DependencyProperty CommandTargetProperty = DependencyProperty.Register("CommandTarget", typeof(IInputElement), typeof(SplitButton), new PropertyMetadata(null));
+        public IInputElement CommandTarget
+        {
+            get { return (IInputElement)GetValue(CommandTargetProperty); }
+            set { SetValue(CommandTargetProperty, value); }
+        }
+
+        #endregion
     }
 }

ExtendedWPFToolkitSolution/Src/WPFToolkit.Extended/Themes/Generic.xaml

@@ -1216,7 +1216,7 @@
                                         <ColumnDefinition Width="*" />
                                         <ColumnDefinition Width="Auto" />
                                     </Grid.ColumnDefinitions>
-                                    <Button x:Name="PART_HeaderButton" Style="{StaticResource SplitButtonStyle}" >
+                                    <Button x:Name="PART_ActionButton" Style="{StaticResource SplitButtonStyle}" >
                                         <ContentPresenter Name="Content" Margin="{TemplateBinding Padding}" Content="{TemplateBinding Content}" ContentTemplate="{TemplateBinding ContentTemplate}" VerticalAlignment="{TemplateBinding VerticalContentAlignment}" HorizontalAlignment="{TemplateBinding HorizontalContentAlignment}" RecognizesAccessKey="true" />
                                     </Button>
                                     <ToggleButton x:Name="PART_ToggleButton" Grid.Column="1" IsTabStop="False"