void RegisterEventHandlersForWindow(AppWindow window)
{
//Set up the activation handler
InputActivationListener activationListener = InputActivationListenerPreview.CreateForApplicationWindow(window);
activationListener.InputActivationChanged += ActivationListener_InputActivationChanged;
// Make sure we release the reference to this window, and release XAML resources, when it's closed
appWindow.Closed += delegate { appWindow = null; appWindowFrame.Content = null; };
}
private void AppWindow_Changed(AppWindow sender, AppWindowChangedEventArgs args)
{
// InputActivationListener.CreateForApplicationWindow throws an exception if called too early
// Delay it until the window visibility has changed
if (args.DidVisibilityChange && _appWindowActivationListener == null)
{
_appWindowActivationListener = InputActivationListenerPreview.CreateForApplicationWindow(_window);
_windowActivated = _appWindowActivationListener.State != InputActivationState.Deactivated;
_appWindowActivationListener.InputActivationChanged += AppWindow_InputActivationChanged;
UpdateBrush();
}
}