void signup_PreviewTouchUp(object sender, TouchEventArgs e) { signup.Background = Brushes.White; log.WriteInteractionLog(5, "", e.TouchDevice); window_manager.open_signup_window(last_pos_x, signup.PointToScreen(new Point(0, 0)).Y); last_pos_x = last_pos_x + pos_x_increment; if (last_pos_x > max_pos_x) last_pos_x = init_pos_x; }