naja/engine.py

   1 import pygame
   2 import pygame.locals as pgl
   3
   4 from naja.events import SceneChangeEvent
   5
   6
   7 class Engine(object):
   8     def __init__(self, surface, scene):
   9         self._surface = surface
  10         self._scene = scene
  11
  12     def run(self):
  13         while True:
  14             for ev in pygame.event.get():
  15                 if ev.type == pgl.QUIT:
  16                     return
  17                 elif SceneChangeEvent.matches(ev):
  18                     self.change_scene(ev.scene)
  19                 else:
  20                     self._scene.handle_event(ev)
  21             self._scene.render(self._surface)
  22             pygame.display.flip()
  23
  24     def change_scene(self, scene):
  25         self._scene.exit()
  26         self._scene = scene
  27         self._scene.enter()