/// <summary>
/// Static constructor
/// </summary>
static ApplicationThemeChanger()
{
ApplicationThemeChanger.Lock = new object();
if (Application.Current is null)
{
System.Diagnostics.Trace.WriteLine($"ERROR: Cannot change the application theme because {nameof(Application)}.{nameof(Application.Current)} is null. This can happen when running unit tests.");
return;
}
// Attach to the applications activated event, so that an reference to its main window can be obtained once it is available.
Application.Current.Activated += ApplicationThemeChanger.HandleApplicationActivated;
// Try to get a reference to the applications main window regardless of the activation event (it could have been fired already).
ApplicationThemeChanger.MainWindow = ApplicationThemeChanger.GetMainWindow();
}
/// <summary>
/// Handler for the current applications <see cref="Application.Activated"/> event.
/// </summary>
private static void HandleApplicationActivated(object sender, EventArgs args)
{
// Try to get a reference to the applications main window.
ApplicationThemeChanger.MainWindow = ApplicationThemeChanger.GetMainWindow();
}