1 files changed, 19 insertions, 0 deletions
diff --git a/src/Godosa.Desktop/DisplayMode.cs b/src/Godosa.Desktop/DisplayMode.cs
new file mode 100644
index 0000000..527fa43
--- /dev/null
+++ b/src/Godosa.Desktop/DisplayMode.cs
@@ -0,0 +1,19 @@
+using Avalonia.Controls;
+using Avalonia.Media;
+
+namespace Godosa.Desktop;
+
+/// <summary>Window fullscreen and a UI layer's scale (the 3D view stays outside that layer).</summary>
+public static class DisplayMode
+{
+    public static void SetFullscreen(Window? window, bool fullscreen)
+    {
+        if (window is null) return;
+        bool full = window.WindowState == WindowState.FullScreen;
+        if (fullscreen && !full) window.WindowState = WindowState.FullScreen;
+        else if (!fullscreen && full) window.WindowState = WindowState.Normal;
+    }
+
+    public static void SetUiScale(LayoutTransformControl layer, double factor) =>
+        layer.LayoutTransform = factor == 1.0 ? null : new ScaleTransform(factor, factor);
+}