From c4a2719332cbdf4a453e970762d030b7defc7ea3 Mon Sep 17 00:00:00 2001
From: Berry Wahlberg <40695099+BerryUIKI@users.noreply.github.com>
Date: Fri, 18 Sep 2026 09:38:20 +0800
Subject: [PATCH] Add keyboard navigation shortcuts and click to pause in
 VideoViewer (#47, #1979, #1753)

---
 .../ViewerPanel.xaml.cs                       | 60 ++++++++++++++++++-
 1 file changed, 58 insertions(+), 2 deletions(-)

diff --git a/QuickLook.Plugin/QuickLook.Plugin.VideoViewer/ViewerPanel.xaml.cs b/QuickLook.Plugin/QuickLook.Plugin.VideoViewer/ViewerPanel.xaml.cs
index 6d7c5a489..ec4de6f56 100644
--- a/QuickLook.Plugin/QuickLook.Plugin.VideoViewer/ViewerPanel.xaml.cs
+++ b/QuickLook.Plugin/QuickLook.Plugin.VideoViewer/ViewerPanel.xaml.cs
@@ -1,4 +1,4 @@
-// Copyright © 2017-2026 QL-Win Contributors
+// Copyright © 2017-2026 QL-Win Contributors
 //
 // This file is part of QuickLook program.
 //
@@ -109,6 +109,10 @@ public ViewerPanel(ContextObject context)
         };
 
         PreviewMouseWheel += (_, e) => ChangeVolume(e.Delta / 120d * 0.04d);
+
+        Focusable = true;
+        Loaded += (_, _) => Focus();
+        PreviewKeyDown += ViewerPanel_PreviewKeyDown;
     }
 
     private partial void LoadAndInsertGlassLayer();
@@ -200,17 +204,69 @@ public void Dispose()
 
     private void Panel_MouseLeftButtonDown(object sender, MouseButtonEventArgs e)
     {
+        Focus();
+
         if (e.LeftButton == MouseButtonState.Pressed)
         {
             var wnd = Window.GetWindow(this);
             // Do not allow dragging when window is borderless (e.g. fullscreen)
             if (wnd?.WindowStyle == WindowStyle.None)
+            {
+                TogglePlayPause(this, EventArgs.Empty);
                 return;
+            }
+
+            if (wnd != null)
+            {
+                var startLeft = wnd.Left;
+                var startTop = wnd.Top;
+
+                wnd.DragMove();
+
+                // If the window was not moved, treat this interaction as a click to toggle play/pause
+                if (Math.Abs(wnd.Left - startLeft) < 2 && Math.Abs(wnd.Top - startTop) < 2)
+                {
+                    TogglePlayPause(this, EventArgs.Empty);
+                }
+            }
+        }
+    }
+
+    private void ViewerPanel_PreviewKeyDown(object sender, KeyEventArgs e)
+    {
+        switch (e.Key)
+        {
+            case Key.Left:
+                Seek(-TimeSpan.FromSeconds(5).Ticks);
+                e.Handled = true;
+                break;
+
+            case Key.Right:
+                Seek(TimeSpan.FromSeconds(5).Ticks);
+                e.Handled = true;
+                break;
+
+            case Key.Up:
+                ChangeVolume(0.05d);
+                e.Handled = true;
+                break;
 
-            wnd?.DragMove();
+            case Key.Down:
+                ChangeVolume(-0.05d);
+                e.Handled = true;
+                break;
         }
     }
 
+    private void Seek(long deltaTicks)
+    {
+        if (mediaElement == null)
+            return;
+
+        var target = Math.Max(0, Math.Min(mediaElement.MediaDuration, mediaElement.MediaPosition + deltaTicks));
+        mediaElement.MediaPosition = target;
+    }
+
     public event PropertyChangedEventHandler PropertyChanged;
 
     private void MediaOpened(object o, RoutedEventArgs args)