source: nagslang/engine.py@ 186:d63c19003aec

Last change on this file since 186:d63c19003aec was 180:026297a03963, checked in by Neil Muller <drnlmuller@…>, 8 years ago

Add DoorEvent and tweak ScreenChange to keep more state when the player goes through a door

File size: 2.1 KB
Line 
1"""Top-level event dispatching and area transition."""
2
3import pygame
4import pygame.locals as pgl
5
6from nagslang import constants
7from nagslang.screens.menu import MenuScreen
8from nagslang.screens.area import AreaScreen
9from nagslang.events import ScreenChange
10
11
12class Engine(object):
13 def __init__(self, surface):
14 self._surface = surface
15 self._clock = pygame.time.Clock()
16 self._fps = constants.FPS
17 self._dt = 1. / self._fps
18 self._world = None # TODO: create the world
19 self._current_screen = None
20 self._screens = {
21 'menu': MenuScreen,
22 'level1': AreaScreen,
23 'level2': AreaScreen,
24 }
25 self.change_screen('menu', None)
26 # Dummy resize event, to force us to realise our real size
27 # http://stackoverflow.com/q/16442573/8629
28 pygame.event.post(pygame.event.Event(pgl.VIDEORESIZE,
29 size=(0, 0), w=0, h=0))
30
31 def change_screen(self, new_screen, player):
32 if self._current_screen is not None:
33 self._current_screen.teardown()
34 screen_cls = self._screens[new_screen]
35 self._current_screen = screen_cls(new_screen, player, self._world)
36 self._current_screen.setup()
37
38 def run(self):
39 running = True
40 while running:
41 for ev in pygame.event.get():
42 if ev.type == pgl.QUIT:
43 running = False
44 elif ev.type == pgl.VIDEORESIZE:
45 pygame.display.set_mode(ev.size,
46 pgl.SWSURFACE | pgl.RESIZABLE)
47 self._surface = pygame.display.get_surface()
48 elif ScreenChange.matches(ev):
49 self._surface.fill(pygame.color.Color(0, 0, 0))
50 self.change_screen(ev.screen, ev.player)
51 else:
52 self._current_screen.handle_event(ev)
53 self._current_screen.tick(self._dt)
54 self._current_screen.render(self._surface)
55 pygame.display.flip()
56 self._clock.tick(self._fps)
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