Desktop 'lock' fix: the window no longer steals focus when a full-screen game owns the foreground at launch. Opening after an exclusive-fullscreen game (creator's THE DIVISION 2 gameplay-stream start) the window ACTIVATED by default, Windows dropped the game to the taskbar and the 1920x1040 window covered the whole work area - 'the desktop is locked and I can't reach the game with the mouse'. MainWindow ctor now sets ShowActivated = !MainViewModel.FullscreenGameRunningNow (GetForegroundFullScreenMonitorIndex() != null), so an in-game launch keeps the game focused and live; a normal launch is unchanged. New FullScreenDetectorOverride test seam (mirrors WindowEnumeratorOverride - deterministic, no real Win32 foreground state) + DesktopLockTests: game at launch -> ShowActivated=false, normal launch -> true, FullscreenGameRunningNow reflects the detector. 422 pass / 1 known env flake, 0 build warnings. (Unit: launch focus)

2026-10-10 11:52:17 -07:00
parent c2d64dcd6d
commit 63bf8444bd
6 changed files with 221 additions and 4 deletions
@@ -23,6 +23,10 @@ public partial class MainWindow : Window
        AppLog.Write("MainWindow ctor: after InitializeComponent");
        _viewModel = (MainViewModel)DataContext;
        _viewModel.PropertyChanged += OnViewModelPropertyChanged;
+        // Don't steal focus from an exclusive-fullscreen game the creator is already
+        // playing (e.g. while starting a gameplay stream): activating our window would
+        // drop that game to the taskbar and make the desktop look "locked".
+        ShowActivated = !_viewModel.FullscreenGameRunningNow;
        _topBar = (Controls.TopBar)FindName("TopBar")!;
        _previewPane = (Controls.PreviewPane)FindName("PreviewPane")!;
        _leftPanel = (Controls.LeftPanel)FindName("LeftPanel")!;