[GUI] Basic hotkey and full-screen support (#75)

src/SharpEmu.GUI/MainWindow.axaml

@@ -14,7 +14,8 @@ SPDX-License-Identifier: GPL-2.0-or-later
         ExtendClientAreaToDecorationsHint="True"
         ExtendClientAreaChromeHints="PreferSystemChrome"
         ExtendClientAreaTitleBarHeightHint="44"
-        Icon="avares://SharpEmu.GUI/Assets/SharpEmu.ico">
+        Icon="avares://SharpEmu.GUI/Assets/SharpEmu.ico"
+        KeyDown="OnKeyDown">
 
   <Grid RowDefinitions="44,*,32">
 

src/SharpEmu.GUI/MainWindow.axaml.cs

@@ -8,6 +8,7 @@ using Avalonia.Input;
 using Avalonia.Interactivity;
 using Avalonia.Media;
 using Avalonia.Media.Imaging;
+using Avalonia.Platform;
 using Avalonia.Platform.Storage;
 using Avalonia.Threading;
 using Avalonia.VisualTree;
@@ -292,6 +293,34 @@ public partial class MainWindow : Window
         }
     }
 
+    private void OnKeyDown(object sender, KeyEventArgs args)
+    {
+        args.Handled = true;
+        switch (args.Key)
+        {
+            case Key.F11:
+                OnWindowFullScreen(this, new RoutedEventArgs());
+                break;
+            default:
+                args.Handled = false;
+                break;
+        }
+    }
+
+    private void OnWindowFullScreen(object sender, RoutedEventArgs args)
+    {
+        if (WindowState == WindowState.FullScreen)
+        {
+            WindowState = WindowState.Normal;
+            ExtendClientAreaChromeHints = ExtendClientAreaChromeHints.PreferSystemChrome;
+        }
+        else
+        {
+            WindowState = WindowState.FullScreen;
+            ExtendClientAreaChromeHints = ExtendClientAreaChromeHints.NoChrome;
+        }
+    }
+
     private void OnWindowClosing()
     {
         ReadControlsIntoSettings();