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comparison gamelib/engine.py @ 52:1d3d20bdc8b9

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Move engine stuff into it's own file
author Neil Muller <drnlmuller@gmail.com>
date Mon, 07 May 2012 21:55:55 +0200
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children 7309392d9ca9
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51:ac637e84f8f8 52:1d3d20bdc8b9
1 # -*- coding: utf-8 -*-
2 # vim:fileencoding=utf-8 ai ts=4 sts=4 et sw=4
3
4
5 """Game engine stuff"""
6
7 import pygame
8 from pygame.locals import (MOUSEBUTTONDOWN, MOUSEBUTTONUP, MOUSEMOTION, QUIT,
9 USEREVENT)
10 from pygame.time import Clock
11
12 from gamelib.constants import FPS
13
14
15 class UserEvent(object):
16 # Handy event wrapper
17
18 TYPE = "unknown"
19
20 @classmethod
21 def post(cls, **kw):
22 event = pygame.event.Event(USEREVENT, utype=cls.TYPE, **kw)
23 pygame.event.post(event)
24
25 @classmethod
26 def matches(cls, event):
27 return event.type == USEREVENT and event.utype == cls.TYPE
28
29
30 class AddWindow(UserEvent):
31 # Add the given window to the top of the window stack
32
33 TYPE = "ADD_WINDOW"
34
35 @classmethod
36 def post(cls, window):
37 super(AddWindow, cls).post(window=window)
38
39
40 class PopWindow(UserEvent):
41 # Pop a window off the top of the window stack
42
43 TYPE = "POP_WINDOW"
44
45 @classmethod
46 def post(cls):
47 super(PopWindow, cls).post()
48
49
50 class Engine(object):
51
52 def __init__(self, screen):
53 self._window_stack = []
54 self._running = False
55 self._mouse_down = False
56 self._screen = screen
57
58 def run(self, window):
59 clock = Clock()
60 self._window_stack.append(window)
61 self._running = True
62 self._mouse_down = False
63 while self._running:
64 self.process_input()
65 self.draw()
66 clock.tick(FPS)
67
68 def draw(self):
69 for view in self._window_stack:
70 view.draw(self._screen)
71 pygame.display.flip()
72
73 def process_input(self):
74 for event in pygame.event.get():
75 if self._mouse_down:
76 if event.type == MOUSEBUTTONUP:
77 self._mouse_down = False
78 self._window_stack[-1].on_mouse_up(event.pos)
79 elif event.type == MOUSEMOTION:
80 self._window_stack[-1].on_mouse_move(event.pos)
81 elif not self._mouse_down and event.type == MOUSEBUTTONDOWN:
82 self._mouse_down = True
83 self._window_stack[-1].on_mouse_down(event.pos)
84 elif event.type == QUIT:
85 self._running = False
86 elif AddWindow.matches(event):
87 self._window_stack.append(event.window)
88 elif PopWindow.matches(event):
89 self._window_stack.pop()