PropertyGrid: added PropertyValueChanged event

ExtendedWPFToolkitSolution/Src/WPFToolkit.Extended/PropertyGrid/Implementation/PropertyGrid.cs

@@ -495,5 +495,32 @@ namespace Microsoft.Windows.Controls.PropertyGrid
         }
 
         #endregion //Methods
+
+        #region Events
+
+        public static readonly RoutedEvent PropertyValueChangedEvent = EventManager.RegisterRoutedEvent("PropertyValueChanged", RoutingStrategy.Bubble, typeof(PropertyValueChangedEventHandler), typeof(PropertyGrid));
+        public event PropertyValueChangedEventHandler PropertyValueChanged
+        {
+            add { AddHandler(PropertyValueChangedEvent, value); }
+            remove { RemoveHandler(PropertyValueChangedEvent, value); }
+        }
+
+        //TODO: add SelectedPropertyItemChanged event
+
+        #endregion
+    }
+
+    public delegate void PropertyValueChangedEventHandler(object sender, PropertyValueChangedEventArgs e);
+    public class PropertyValueChangedEventArgs : RoutedEventArgs
+    {
+        public object NewValue { get; set; }
+        public object OldValue { get; set; }
+
+        public PropertyValueChangedEventArgs(RoutedEvent routedEvent, object source, object oldValue, object newValue)
+            : base(routedEvent, source)
+        {
+            NewValue = newValue;
+            OldValue = oldValue;
+        }
     }
 }

ExtendedWPFToolkitSolution/Src/WPFToolkit.Extended/PropertyGrid/Implementation/PropertyItem.cs

@@ -285,7 +285,8 @@ namespace Microsoft.Windows.Controls.PropertyGrid
 
         protected virtual void OnValueChanged(object oldValue, object newValue)
         {
-            // TODO: Add your property changed side-effects. Descendants can override as well.
+            if (IsInitialized)
+                RaiseEvent(new PropertyValueChangedEventArgs(PropertyGrid.PropertyValueChangedEvent, this, oldValue, newValue));
         }
 
         #endregion //Value
@@ -335,6 +336,12 @@ namespace Microsoft.Windows.Controls.PropertyGrid
 
         #endregion //Constructors
 
+        #region Events
+
+        public static readonly RoutedEvent PropertyValueChangedEvent = PropertyGrid.PropertyValueChangedEvent.AddOwner(typeof(PropertyItem));
+
+        #endregion //Events
+
         #region Event Handlers
 
         void PropertyItem_PreviewMouseDown(object sender, MouseButtonEventArgs e)