RichTextBox: changed format bar to only show when highlighting with mouse at the end of the selection, not during selection. try to improve hiding the format bar when mousing outside of the richtextbox.

ExtendedWPFToolkitSolution/Src/WPFToolkit.Extended/RichTextBoxFormatBar/RichTextBoxFormatBarManager.cs

@@ -3,6 +3,7 @@ using System.Windows;
 using System.Windows.Controls;
 using System.Windows.Documents;
 using Microsoft.Windows.Controls.Core;
+using System.Windows.Input;
 
 namespace Microsoft.Windows.Controls
 {
@@ -51,10 +52,10 @@ namespace Microsoft.Windows.Controls
 
         #region Event Handlers
 
-        void RichTextBox_SelectionChanged(object sender, EventArgs e)
+        void RichTextBox_PreviewMouseLeftButtonUp(object sender, MouseButtonEventArgs e)
         {
             TextRange selectedText = new TextRange(_richTextBox.Selection.Start, _richTextBox.Selection.End);
-            if (selectedText.Text.Length > 0 && !String.IsNullOrWhiteSpace(selectedText.Text)) 
+            if (selectedText.Text.Length > 0 && !String.IsNullOrWhiteSpace(selectedText.Text))
             {
                 ShowAdorner();
             }
@@ -64,6 +65,16 @@ namespace Microsoft.Windows.Controls
             }
         }
 
+        void RichTextBox_PreviewMouseMove(object sender, MouseEventArgs e)
+        {
+            //if the mouse moves outside the richtextbox bounds hide the adorner
+            //though this deosn't always work, especially if the user moves the mouse very quickly.
+            //need to find a better solution, but this will work for now.
+            Point p = e.GetPosition(_richTextBox);
+            if (p.X <= 5.0 || p.X >= _richTextBox.ActualWidth - 5 || p.Y <= 3.0 || p.Y >= _richTextBox.ActualHeight - 3)
+                HideAdorner();
+        }
+
         #endregion //Event Handlers
 
         #region Methods
@@ -77,23 +88,12 @@ namespace Microsoft.Windows.Controls
         {
             _richTextBox = richTextBox;
             _richTextBox.PreviewMouseMove += RichTextBox_PreviewMouseMove;
-            _richTextBox.Selection.Changed += RichTextBox_SelectionChanged;
+            _richTextBox.PreviewMouseLeftButtonUp += RichTextBox_PreviewMouseLeftButtonUp;
 
             _adorner = new UIElementAdorner<Control>(_richTextBox);
 
             formatBar.RichTextBox = _richTextBox;
-            _toolbar = formatBar;
-            
-        }
-
-        void RichTextBox_PreviewMouseMove(object sender, System.Windows.Input.MouseEventArgs e)
-        {
-            //if the mouse moves outside the richtextbox bounds hide the adorner
-            //though this deosn't always work, especially if the user moves the mouse very quickly.
-            //need to find a better solution, but this will work for now.
-            Point p = e.GetPosition(_richTextBox);
-            if (p.X <= 5.0 || p.X >= _richTextBox.ActualWidth - 5 || p.Y <= 3.0 || p.Y >= _richTextBox.ActualHeight - 3)
-                HideAdorner();
+            _toolbar = formatBar;            
         }
 
         /// <summary>