From 0cdaad32aff83f206d1ba7118b24c53a775b808b Mon Sep 17 00:00:00 2001
From: Paddy Xu <xupaddy@gmail.com>
Date: Sat, 1 Jul 2017 23:17:55 +0300
Subject: [PATCH] Allow full window mouse dragging

---
 QuickLook/MainWindowTransparent.xaml          |  3 +--
 QuickLook/MainWindowTransparent.xaml.cs       |  2 ++
 QuickLook/Plugin/ContextObject.cs             | 16 +++++++++++++++-
 QuickLook/Plugin/InfoPanel/PluginInterface.cs |  1 +
 4 files changed, 19 insertions(+), 3 deletions(-)

diff --git a/QuickLook/MainWindowTransparent.xaml b/QuickLook/MainWindowTransparent.xaml
index 2cdb588..acdcc96 100644
--- a/QuickLook/MainWindowTransparent.xaml
+++ b/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">
diff --git a/QuickLook/MainWindowTransparent.xaml.cs b/QuickLook/MainWindowTransparent.xaml.cs
index c17c7bf..489c019 100644
--- a/QuickLook/MainWindowTransparent.xaml.cs
+++ b/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();
 
diff --git a/QuickLook/Plugin/ContextObject.cs b/QuickLook/Plugin/ContextObject.cs
index a840586..614d584 100644
--- a/QuickLook/Plugin/ContextObject.cs
+++ b/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;
         }
 
diff --git a/QuickLook/Plugin/InfoPanel/PluginInterface.cs b/QuickLook/Plugin/InfoPanel/PluginInterface.cs
index ab24f77..a00b540 100644
--- a/QuickLook/Plugin/InfoPanel/PluginInterface.cs
+++ b/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)