From 22c51ddf3c257b76bbf3d245f4a33c20601d088a Mon Sep 17 00:00:00 2001
From: Sebastian Krzyszkowiak <dos@dosowisko.net>
Date: Tue, 27 Oct 2026 03:07:01 +0100
Subject: [PATCH] Maximize the window automatically when running in gamescope
 or Steam Big Picture

---
 StarterNG/MainWindow.axaml.cs | 17 +++++++++++++++--
 1 file changed, 15 insertions(+), 2 deletions(-)

diff --git a/StarterNG/MainWindow.axaml.cs b/StarterNG/MainWindow.axaml.cs
index 03864d9..a827c5a 100644
--- a/StarterNG/MainWindow.axaml.cs
+++ b/StarterNG/MainWindow.axaml.cs
@@ -38,7 +38,7 @@ public partial class MainWindow : Window
         ExtendClientAreaToDecorationsHint = true;
         ExtendClientAreaTitleBarHeightHint = TitleBarHeight;
 
-        if (AppServices.Current.Settings.WindowMaximized)
+        if (AppServices.Current.Settings.WindowMaximized || wantsMaximized())
             WindowState = WindowState.Maximized;
 
         PropertyChanged += (_, e) =>
@@ -309,6 +309,19 @@ public partial class MainWindow : Window
         menu.Open(HelpButton);
     }
 
+    private bool wantsMaximized()
+    {
+        // make sure the window fills the whole screen on gamescope sessions
+        if (Environment.GetEnvironmentVariable("XDG_CURRENT_DESKTOP") == "gamescope")
+            return true;
+
+        // catch being launched via Steam Big Picture mode as well
+        if (Environment.GetEnvironmentVariable("SteamGamepadUI") == "1")
+            return true;
+
+        return false;
+    }
+
     private void linkClick(object? sender, RoutedEventArgs e)
     {
         if (sender is not Button btn)
@@ -627,6 +640,6 @@ public partial class MainWindow : Window
         if (!IsVisible)
             Show();
         if (WindowState == WindowState.Minimized)
-            WindowState = WindowState.Normal;
+            WindowState = wantsMaximized() ? WindowState.Maximized : WindowState.Normal;
     }
 }