class Navigator(EventDispatcher):
_current_view = None
def __init__(self):
super(Navigator, self).__init__()
self._screen = pygame.display.get_surface()
self._root = Layer(None, (0, 0), (
self._screen.get_width(), self._screen.get_height()
))
self.add(self._root)
self._stack = []
def current_view(self):
return self._current_view
def push(self, view):
if self._current_view:
self._stack.append(self._current_view)
self.set_current_view(view)
def pop(self):
if len(self._stack):
self.set_current_view(self._stack.pop())
def set_current_view(self, view):
if self._current_view:
self._root.remove_layer(self._current_view)
self._root.add_layer(view)
self._current_view = view
self._current_view.set_navigator(self)
def on_frame(self, delta):
super(Navigator, self).on_frame(delta)
if self._current_view:
self._current_view
pygame.display.flip()
