Mercurial > mamba
annotate mamba/engine.py @ 320:13eaea2365b3
Stop music on scene changes
author | Neil Muller <drnlmuller@gmail.com> |
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date | Fri, 16 Sep 2011 19:34:14 +0200 |
parents | 49fe66680ff8 |
children | 38f95fbc3710 |
rev | line source |
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12 | 1 """Game engine and top-level game loop.""" |
2 | |
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3 from mamba.constants import SCREEN, FPS |
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4 from mamba.sound import stop_sound |
38 | 5 |
12 | 6 import pygame.event |
7 import pygame.display | |
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8 import pygame.time |
38 | 9 import pygame |
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10 from pygame.locals import QUIT, USEREVENT |
12 | 11 |
12 | |
13 class Engine(object): | |
14 def __init__(self): | |
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15 self._habitat = None |
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16 self._fps = FPS |
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17 |
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18 def set_habitat(self, habitat): |
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19 if self._habitat is not None: |
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20 self._habitat.on_exit() |
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21 self._habitat = habitat |
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22 if self._habitat is not None: |
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23 self._habitat.on_enter() |
12 | 24 |
25 def run(self): | |
26 """Game loop.""" | |
27 get_events = pygame.event.get | |
28 flip = pygame.display.flip | |
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29 clock = pygame.time.Clock() |
12 | 30 while True: |
31 events = get_events() | |
32 for ev in events: | |
33 if ev.type is QUIT: | |
34 return | |
61 | 35 elif NewHabitatEvent.matches(ev): |
36 self.set_habitat(ev.habitat) | |
37 else: | |
38 self._habitat.dispatch(ev) | |
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39 surface = pygame.display.get_surface() |
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40 self._habitat.draw(surface) |
12 | 41 flip() |
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42 self._fps = 1000.0 / clock.tick(FPS) |
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43 |
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44 |
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45 class Habitat(object): |
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46 |
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47 def __init__(self, size=SCREEN): |
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48 from mamba.widgets.base import Container |
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49 stop_sound() # Always stop any music on scene changes |
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50 self.surface_size = size |
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51 self.surface = None |
106 | 52 self.container = Container(pygame.Rect((0, 0), self.surface_size)) |
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53 |
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54 def on_enter(self): |
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55 """Called when this becomes the current habitat.""" |
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56 # Create the surface here as flipping between editor and |
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57 # other things kills pygame.display |
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58 self.surface = pygame.Surface(self.surface_size) |
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59 |
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60 def on_exit(self): |
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61 """Called when this stops being the current habitat.""" |
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62 self.surface = None |
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63 |
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64 def dispatch(self, ev): |
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65 self.container.event(ev) |
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66 |
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67 def draw(self, surface): |
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68 if self.surface: |
152 | 69 self.surface.fill(pygame.Color('gray')) |
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70 self.container.draw(self.surface) |
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71 surface.blit(self.surface, self.surface.get_rect()) |
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72 |
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73 |
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74 class UserEvent(object): |
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75 |
61 | 76 TYPE = "UNKNOWN" |
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77 |
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78 @classmethod |
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79 def post(cls, **kws): |
61 | 80 ev = pygame.event.Event(USEREVENT, utype=cls.TYPE, **kws) |
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81 pygame.event.post(ev) |
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82 |
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83 @classmethod |
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84 def matches(cls, ev): |
61 | 85 return ev.type is USEREVENT and ev.utype == cls.TYPE |
86 | |
87 | |
88 class NewHabitatEvent(UserEvent): | |
89 | |
90 TYPE = "NEW_HABITAT" | |
91 | |
92 @classmethod | |
93 def post(cls, habitat): | |
62 | 94 super(NewHabitatEvent, cls).post(habitat=habitat) |
185 | 95 |
96 | |
97 class SnakeDiedEvent(UserEvent): | |
98 | |
99 TYPE = "SNAKE_DIED" | |
100 | |
101 @classmethod | |
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102 def post(cls, reason): |
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103 super(SnakeDiedEvent, cls).post(reason=reason) |
213 | 104 |
105 | |
106 class LevelCompletedEvent(UserEvent): | |
107 | |
108 TYPE = "LEVEL_COMPLETED" | |
109 | |
110 @classmethod | |
111 def post(cls): | |
112 super(LevelCompletedEvent, cls).post() | |
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113 |
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114 |
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115 class FlipArrowsEvent(UserEvent): |
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116 |
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117 TYPE = "FLIP_ARROWS" |
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118 |
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119 @classmethod |
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120 def post(cls): |
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121 super(FlipArrowsEvent, cls).post() |