Merge pull request #544 from pc223/fix-setting-freezes-after-lock-screen

Fix (workaround) for the settings-window freezes after lock screen (Win+L)

Author: jjw24

Flow.Launcher/SettingWindow.xaml

@@ -18,6 +18,7 @@
         Height="600" Width="900"
         MinWidth="850"
         MinHeight="500"
+        Loaded="OnLoaded" 
         Closed="OnClosed"
         d:DataContext="{d:DesignInstance vm:SettingWindowViewModel}">
     <Window.InputBindings>

Flow.Launcher/SettingWindow.xaml.cs

@@ -2,6 +2,7 @@
 using System.IO;
 using System.Windows;
 using System.Windows.Input;
+using System.Windows.Interop;
 using System.Windows.Navigation;
 using Microsoft.Win32;
 using NHotkey;
@@ -35,6 +36,14 @@ public SettingWindow(IPublicAPI api, SettingWindowViewModel viewModel)
         }
 
         #region General
+        private void OnLoaded(object sender, RoutedEventArgs e)
+        {
+            // Fix (workaround) for the window freezes after lock screen (Win+L)
+            // https://stackoverflow.com/questions/4951058/software-rendering-mode-wpf
+            HwndSource hwndSource = PresentationSource.FromVisual(this) as HwndSource;
+            HwndTarget hwndTarget = hwndSource.CompositionTarget;
+            hwndTarget.RenderMode = RenderMode.SoftwareOnly;
+        }
 
         private void OnAutoStartupChecked(object sender, RoutedEventArgs e)
         {