Make use of scroll bars in ScrollViewer

Author: xupefei

QuickLook.Plugin/QuickLook.Plugin.ImageViewer/ImagePanel.xaml.cs

@@ -45,8 +45,8 @@ public ImagePanel(string path)
 
             viewPanel.PreviewMouseWheel += ViewPanel_PreviewMouseWheel;
 
-            viewPanel.PreviewMouseLeftButtonDown += ViewPanel_PreviewMouseLeftButtonDown;
-            viewPanel.PreviewMouseMove += ViewPanel_PreviewMouseMove;
+            viewPanel.MouseLeftButtonDown += ViewPanel_MouseLeftButtonDown;
+            viewPanel.MouseMove += ViewPanel_MouseMove;
         }
 
         private void LoadImage(string path)
@@ -68,21 +68,25 @@ private void LoadImage(string path)
             }
         }
 
-        private void ViewPanel_PreviewMouseLeftButtonDown(object sender, MouseButtonEventArgs e)
+        private void ViewPanel_MouseLeftButtonDown(object sender, MouseButtonEventArgs e)
         {
+            e.MouseDevice.Capture(viewPanel);
+
             _dragInitPos = e.GetPosition(viewPanel);
             var temp = _dragInitPos.Value; // Point is a type value
             temp.Offset(viewPanel.HorizontalOffset, viewPanel.VerticalOffset);
             _dragInitPos = temp;
         }
 
-        private void ViewPanel_PreviewMouseMove(object sender, MouseEventArgs e)
+        private void ViewPanel_MouseMove(object sender, MouseEventArgs e)
         {
             if (!_dragInitPos.HasValue)
                 return;
 
             if (e.LeftButton == MouseButtonState.Released)
             {
+                e.MouseDevice.Capture(null);
+
                 _dragInitPos = null;
                 return;
             }

QuickLook.Plugin/QuickLook.Plugin.PDFViewer/PdfViewerControl.xaml.cs

@@ -250,8 +250,8 @@ public void LoadPdf(string path)
             pageViewPanel.PreviewMouseWheel += NavigatePage;
             StartMouseWhellDelayedZoomMonitor(pageViewPanel);
 
-            pageViewPanel.PreviewMouseLeftButtonDown += DragScrollStart;
-            pageViewPanel.PreviewMouseMove += DragScrolling;
+            pageViewPanel.MouseLeftButtonDown += DragScrollStart;
+            pageViewPanel.MouseMove += DragScrolling;
         }
 
         private void DragScrolling(object sender, MouseEventArgs e)
@@ -261,6 +261,8 @@ private void DragScrolling(object sender, MouseEventArgs e)
 
             if (e.LeftButton == MouseButtonState.Released)
             {
+                e.MouseDevice.Capture(null);
+
                 _dragInitPos = null;
                 return;
             }
@@ -275,6 +277,8 @@ private void DragScrolling(object sender, MouseEventArgs e)
 
         private void DragScrollStart(object sender, MouseButtonEventArgs e)
         {
+            e.MouseDevice.Capture(pageViewPanel);
+
             _dragInitPos = e.GetPosition(pageViewPanel);
             var temp = _dragInitPos.Value; // Point is a type value
             temp.Offset(pageViewPanel.HorizontalOffset, pageViewPanel.VerticalOffset);