Pushing missing changes

1 files changed, 41 insertions, 0 deletions

diff --git a/MediaBrowser.UI.Controls/ExtendedScrollViewer.cs b/MediaBrowser.UI.Controls/ExtendedScrollViewer.cs
new file mode 100644
index 000000000..c1a6f1c47
--- /dev/null
+++ b/MediaBrowser.UI.Controls/ExtendedScrollViewer.cs
@@ -0,0 +1,41 @@
+using System.Windows.Controls;
+using System.Windows.Input;
+
+namespace MediaBrowser.UI.Controls
+{
+    /// <summary>
+    /// This subclass solves the problem of ScrollViewers eating KeyDown for all arrow keys
+    /// </summary>
+    public class ExtendedScrollViewer : ScrollViewer
+    {
+        protected override void OnKeyDown(KeyEventArgs e)
+        {
+            if (e.Handled || e.OriginalSource == this)
+            {
+                base.OnKeyDown(e);
+                return;
+            } 
+            
+            // Don't eat left/right if horizontal scrolling is disabled
+            if (e.Key == Key.Left || e.Key == Key.Right)
+            {
+                if (HorizontalScrollBarVisibility == ScrollBarVisibility.Disabled)
+                {
+                    return;
+                }
+            }
+
+            // Don't eat up/down if vertical scrolling is disabled
+            if (e.Key == Key.Up || e.Key == Key.Down)
+            {
+                if (VerticalScrollBarVisibility == ScrollBarVisibility.Disabled)
+                {
+                    return;
+                }
+            }
+
+            // Let the base class do it's thing
+            base.OnKeyDown(e);
+        }
+    }
+}