public ThemeManager(bool useWinSysAccent, bool useWinDefFont, bool includeWindowsTitleBar)
{
UseSegoeUIOnWindows = useWinDefFont;
UseSystemAccentOnWindows = useWinSysAccent;
IncludeWindowsTitleBarInThemeChange = includeWindowsTitleBar;
_isWindows = RuntimeInformation.IsOSPlatform(OSPlatform.Windows);
if (_isWindows)
{
Win32Interop.OSVERSIONINFOEX osInfo = new Win32Interop.OSVERSIONINFOEX {
OSVersionInfoSize = Marshal.SizeOf(typeof(Win32Interop.OSVERSIONINFOEX))
};
Win32Interop.RtlGetVersion(ref osInfo);
bool useDark = Win32Interop.GetSystemTheme(osInfo);
PreferredTheme = useDark ? FluentThemeMode.Dark : FluentThemeMode.Light;
}
else
{
PreferredTheme = FluentThemeMode.Light;
}
}
public void Refresh()
{
var appStyles = Application.Current.Styles;
for (int i = 0; i < appStyles.Count; i++)
{
if (appStyles[i] is FluentTheme ft)
{
ft.Mode = PreferredTheme;
}
else if (appStyles[i] is FluentAvaloniaTheme fa)
{
fa.Mode = PreferredTheme;
if (UseSystemAccentOnWindows && _isWindows)
{
SetSystemAccentColorsFromSystem(fa.ThemeStyles.CommonResources);
}
else if (CustomAccentColors != null && CustomAccentColors.Length == 7)
{
SetCustomAccentColor(fa.ThemeStyles.CommonResources);
}
if (UseSegoeUIOnWindows && _isWindows)
{
fa.ThemeStyles.CommonResources["ContentControlThemeFontFamily"] = new FontFamily("Segoe UI");
}
}
else if (appStyles[i] is ThemeStyles thmSty)
{
thmSty.CurrentTheme = PreferredTheme;
if (UseSystemAccentOnWindows && _isWindows)
{
SetSystemAccentColorsFromSystem(thmSty.CommonResources);
}
else if (CustomAccentColors != null && CustomAccentColors.Length == 7)
{
SetCustomAccentColor(thmSty.CommonResources);
}
if (UseSegoeUIOnWindows && _isWindows)
{
thmSty.CommonResources["ContentControlThemeFontFamily"] = new FontFamily("Segoe UI");
}
}
else if (appStyles[i] is StyleInclude si)
{
if (si.Loaded != null && si.Loaded is ThemeStyles ts)
{
ts.CurrentTheme = PreferredTheme == FluentThemeMode.Light ? "Light" : "Dark";
if (UseSystemAccentOnWindows && _isWindows)
{
SetSystemAccentColorsFromSystem(ts.CommonResources);
}
else if (CustomAccentColors != null && CustomAccentColors.Length == 7)
{
SetCustomAccentColor(ts.CommonResources);
}
if (UseSegoeUIOnWindows && _isWindows)
{
ts.CommonResources["ContentControlThemeFontFamily"] = new FontFamily("Segoe UI");
}
}
}
}
if (IncludeWindowsTitleBarInThemeChange && _isWindows)
{
if (Application.Current.ApplicationLifetime is IClassicDesktopStyleApplicationLifetime cd)
{
Win32Interop.OSVERSIONINFOEX osInfo = new Win32Interop.OSVERSIONINFOEX {
OSVersionInfoSize = Marshal.SizeOf(typeof(Win32Interop.OSVERSIONINFOEX))
};
Win32Interop.RtlGetVersion(ref osInfo);
for (int i = 0; i < cd.Windows.Count; i++)
{
Win32Interop.ApplyTheme(cd.Windows[i].PlatformImpl.Handle.Handle, PreferredTheme == FluentThemeMode.Dark, osInfo);
}
}
}
}
