public static void ChangeTheme(ResourceDictionary resources, Accent newAccent, Theme newTheme)
{
if (resources == null)
{
throw new ArgumentNullException("resources");
}
var themeResource = (newTheme == Theme.Light) ? LightResource : DarkResource;
ApplyResourceDictionary(newAccent.Resources, resources);
ApplyResourceDictionary(themeResource, resources);
}
public static void ChangeTheme(Window window, Accent accent, Theme theme)
{
ChangeTheme(window.Resources, accent, theme);
}
private static void ChangeTheme(ResourceDictionary resources, Tuple <Theme, Accent> oldThemeInfo, Accent newAccent, Theme newTheme)
{
var themeChanged = false;
if (oldThemeInfo != null)
{
var oldAccent = oldThemeInfo.Item2;
if (oldAccent != null && oldAccent.Name != newAccent.Name)
{
var oldAccentResource = resources.MergedDictionaries.FirstOrDefault(d => d.Source == oldAccent.Resources.Source);
if (oldAccentResource != null)
{
resources.MergedDictionaries.Add(newAccent.Resources);
var ok = resources.MergedDictionaries.Remove(oldAccentResource);
themeChanged = true;
}
}
var oldTheme = oldThemeInfo.Item1;
if (oldTheme != null && oldTheme != newTheme)
{
var oldThemeResource = (oldTheme == Theme.Light) ? LightResource : DarkResource;
var md = resources.MergedDictionaries.FirstOrDefault(d => d.Source == oldThemeResource.Source);
if (md != null)
{
var newThemeResource = (newTheme == Theme.Light) ? LightResource : DarkResource;
resources.MergedDictionaries.Add(newThemeResource);
var ok = resources.MergedDictionaries.Remove(md);
themeChanged = true;
}
}
}
else
{
ChangeTheme(resources, newAccent, newTheme);
themeChanged = true;
}
if (themeChanged)
{
OnThemeChanged(newAccent, newTheme);
}
}
public static void ChangeTheme(Application app, Accent accent, Theme theme)
{
ChangeTheme(app.Resources, accent, theme);
}