Allow full window mouse dragging

QuickLook/MainWindowTransparent.xaml

@@ -25,8 +25,7 @@
                  Path="ContextObject.CanResize" />
     </Window.ResizeMode>
     <WindowChrome.WindowChrome>
-        <WindowChrome CaptionHeight="{Binding Height, ElementName=titlebar}"
-                      ResizeBorderThickness="{Binding ContextObject.CanResize, Converter={StaticResource BooleanToResizeBorderThicknessConverter}, ElementName=mainWindow}"
+        <WindowChrome x:Name="chrome" ResizeBorderThickness="{Binding ContextObject.CanResize, Converter={StaticResource BooleanToResizeBorderThicknessConverter}, ElementName=mainWindow}"
                       UseAeroCaptionButtons="False" />
     </WindowChrome.WindowChrome>
     <Border x:Name="windowBorder" BorderThickness="1" BorderBrush="#FF7B7B7B">

QuickLook/MainWindowTransparent.xaml.cs

@@ -149,6 +149,8 @@ namespace QuickLook
 
             ResizeAndCenter(new Size(newWidth, newHeight));
 
+            chrome.CaptionHeight = ContextObject.FullWindowDragging ? Height : titlebar.Height - 5;
+
             if (Visibility != Visibility.Visible)
                 Show();
 

QuickLook/Plugin/ContextObject.cs

@@ -31,7 +31,7 @@ namespace QuickLook.Plugin
     {
         private bool _canFocus;
         private bool _canResize = true;
-
+        private bool _fullWindowDragging;
         private bool _isBusy = true;
         private string _title = "";
         private object _viewerContent;
@@ -98,6 +98,19 @@ namespace QuickLook.Plugin
             }
         }
 
+        /// <summary>
+        ///     Set whether the full viewer window can be used for mouse dragging.
+        /// </summary>
+        public bool FullWindowDragging
+        {
+            get => _fullWindowDragging;
+            set
+            {
+                _fullWindowDragging = value;
+                OnPropertyChanged();
+            }
+        }
+
         /// <summary>
         ///     Set whether user are allowed to set focus at the viewer window.
         /// </summary>
@@ -164,6 +177,7 @@ namespace QuickLook.Plugin
             IsBusy = true;
             PreferredSize = new Size();
             CanResize = true;
+            FullWindowDragging = false;
             CanFocus = false;
         }
 

QuickLook/Plugin/InfoPanel/PluginInterface.cs

@@ -41,6 +41,7 @@ namespace QuickLook.Plugin.InfoPanel
 
             context.Title = "";
             context.CanResize = false;
+            context.FullWindowDragging = true;
         }
 
         public void View(string path, ContextObject context)