public void LoadTheme()
{
// Add custom accent resource dictionary to the ThemeManager, contains default color values
MahAppsThemeManager.AddAccent(CustomAccentKey, new Uri("pack://application:,,,/neo-gui;component/ResourceDictionaries/CustomAccentThemeResources.xaml"));
// Try load custom theme
var themeJson = settingsManager.AppTheme;
// Check if theme JSON has been set
if (string.IsNullOrEmpty(themeJson))
{
SetThemeToDefault();
return;
}
var theme = Theme.ImportFromJson(themeJson);
if (theme == null)
{
theme = Theme.Default;
}
this.SetTheme(theme);
}
protected override async void OnStartup(object sender, StartupEventArgs e)
{
var startupTasks =
GetAllInstances(typeof(StartupTask))
.Cast <ExportedDelegate>()
.Select(exportedDelegate => (StartupTask)exportedDelegate.CreateDelegate(typeof(StartupTask)));
startupTasks.Apply(s => s());
base.OnStartup(sender, e);
await NatHelper.DiscoverAsync();
ThemeManager.AddAppTheme("CobaltLight", new Uri("pack://application:,,,/Themes/CobaltLight.xaml"));
ThemeManager.AddAppTheme("CobaltDark", new Uri("pack://application:,,,/Themes/CobaltDark.xaml"));
ThemeManager.ChangeAppStyle(Application.Current, ThemeManager.Accents.First(a => a.Name == "Blue"),
ThemeManager.GetAppTheme("CobaltLight"));
}
public void SetTheme(Theme newTheme)
{
// Change app style to the custom accent and current theme
var accent = MahAppsThemeManager.GetAccent(CustomAccentKey);
var theme = MahAppsThemeManager.GetAppTheme(newTheme.Style == Style.Light ? "BaseLight" : "BaseDark");
// Modify resource values to new theme values
// Set accent colors
if (accent.Resources.Contains(AccentBaseColorKey))
{
// Set base accent color
accent.Resources[AccentBaseColorKey] = newTheme.AccentBaseColor.ToMediaColor();
// Set other accent colors with reduced transparency
// Set 80% transparency accent color
if (accent.Resources.Contains(AccentColor1Key))
{
accent.Resources[AccentColor1Key] = newTheme.AccentBaseColor.SetTransparencyFraction(0.8).ToMediaColor();
}
// Set 60% transparency accent color
if (accent.Resources.Contains(AccentColor2Key))
{
accent.Resources[AccentColor2Key] = newTheme.AccentBaseColor.SetTransparencyFraction(0.6).ToMediaColor();
}
// Set 40% transparency accent color
if (accent.Resources.Contains(AccentColor3Key))
{
accent.Resources[AccentColor3Key] = newTheme.AccentBaseColor.SetTransparencyFraction(0.4).ToMediaColor();
}
// Set 20% transparency accent color
if (accent.Resources.Contains(AccentColor4Key))
{
accent.Resources[AccentColor4Key] = newTheme.AccentBaseColor.SetTransparencyFraction(0.2).ToMediaColor();
}
}
// Set highlight color
if (accent.Resources.Contains(HighlightColorKey))
{
accent.Resources[HighlightColorKey] = newTheme.HighlightColor.ToMediaColor();
}
// Set window border color
if (accent.Resources.Contains(WindowBorderColorKey))
{
accent.Resources[WindowBorderColorKey] = newTheme.WindowBorderColor.ToMediaColor();
// Set 80% transparency window border color
if (accent.Resources.Contains(WindowBorderColor2Key))
{
accent.Resources[WindowBorderColor2Key] = newTheme.WindowBorderColor.SetTransparencyFraction(0.8).ToMediaColor();
}
}
MahAppsThemeManager.ChangeAppStyle(Application.Current, accent, theme);
this.CurrentTheme = newTheme;
}
