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Merge pull request #3798 from Flow-Launcher/win32_dark_mode

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Enable dark mode if the system is in dark mode for Win32 windows
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Jeremy Wu 2025-07-06 17:49:51 +10:00 committed by GitHub
commit 1e9eaf5db8
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3 changed files with 40 additions and 0 deletions
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36
Flow.Launcher.Infrastructure/Win32Helper.cs
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@ -791,5 +791,41 @@ namespace Flow.Launcher.Infrastructure
}
#endregion
#region Win32 Dark Mode
/*
* Inspired by https://github.com/ysc3839/win32-darkmode
*/
[DllImport("uxtheme.dll", EntryPoint = "#135", SetLastError = true)]
private static extern int SetPreferredAppMode(int appMode);
public static void EnableWin32DarkMode(string colorScheme)
{
try
{
// Undocumented API from Windows 10 1809
if (RuntimeInformation.IsOSPlatform(OSPlatform.Windows) &&
Environment.OSVersion.Version.Build >= 17763)
{
var flag = colorScheme switch
{
Constant.Light => 3, // ForceLight
Constant.Dark => 2, // ForceDark
Constant.System => 1, // AllowDark
_ => 0 // Default
};
_ = SetPreferredAppMode(flag);
}
}
catch
{
// Ignore errors on unsupported OS
}
}
#endregion
}
}

3
Flow.Launcher/App.xaml.cs
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@ -188,6 +188,9 @@ namespace Flow.Launcher
Notification.Install();
// Enable Win32 dark mode if the system is in dark mode before creating all windows
Win32Helper.EnableWin32DarkMode(_settings.ColorScheme);
Ioc.Default.GetRequiredService<Portable>().PreStartCleanUpAfterPortabilityUpdate();
API.LogInfo(ClassName, "Begin Flow Launcher startup ----------------------------------------------------");

1
Flow.Launcher/SettingPages/ViewModels/SettingsPaneThemeViewModel.cs
View file

@ -136,6 +136,7 @@ public partial class SettingsPaneThemeViewModel : BaseModel
};
Settings.ColorScheme = value;
_ = _theme.RefreshFrameAsync();
Win32Helper.EnableWin32DarkMode(value);
}
}