tabakrolletjie/engine.py

   1 """ Engine for moving controll scenes and tranistions between them.
   2 """
   3
   4 import pygame.display
   5 import pygame.event
   6 import pygame.time
   7
   8 import pygame.locals as pgl
   9
  10 from .constants import FPS
  11
  12
  13 class Engine(object):
  14     def __init__(self, screen, gamestate):
  15         self._screen = screen
  16         self._gamestate = gamestate
  17         self._scene = None
  18
  19     def set_scene(self, scene):
  20         if self._scene is not None:
  21             self._scene.exit(self._gamestate)
  22         self._scene = scene
  23         self._scene.enter(self._gamestate)
  24
  25     def run(self):
  26         clock = pygame.time.Clock()
  27
  28         while True:
  29             events = pygame.event.get()
  30             for ev in events:
  31                 if ev.type == pgl.QUIT:
  32                     return
  33                 else:
  34                     self._scene.event(ev, self._gamestate)
  35
  36             self._scene.render(self._screen, self._gamestate)
  37             pygame.display.flip()
  38
  39             clock.tick(FPS)