Mercurial > rinkhals
annotate gamelib/engine.py @ 560:8cd13b82585e
Allow ESC to exit high score menu and then still exit game if pressed a second time.
author | Simon Cross <hodgestar@gmail.com> |
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date | Sat, 28 Nov 2009 18:27:59 +0000 |
parents | 296c73dcd286 |
children | a8dde729000a |
rev | line source |
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Extremely rudimentary game engine.
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1 """Game engine and states.""" |
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2 from pgu.engine import Game, State, Quit |
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3 import pygame |
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4 from pygame.locals import USEREVENT, QUIT, KEYDOWN, K_ESCAPE, K_s, K_i |
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5 |
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6 import gameboard |
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7 import gameover |
94 | 8 import sound |
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9 import constants |
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10 import mainmenu |
179 | 11 import helpscreen |
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12 import level |
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13 |
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14 class Engine(Game): |
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15 def __init__(self, main_app, level_name): |
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16 self.main_app = main_app |
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17 self.clock = pygame.time.Clock() |
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18 self.level = level.Level(level_name) |
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19 self._open_window = None |
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20 self.gameboard = None |
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21 |
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22 def tick(self): |
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23 """Tic toc.""" |
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24 pygame.time.wait(10) |
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25 |
532 | 26 def load_new_level(self, new_level): |
27 self.level = new_level | |
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28 |
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29 def open_window(self, window): |
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30 """Open a widget as the main window.""" |
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31 if self._open_window is not None: |
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32 self.main_app.close(self._open_window) |
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33 self.main_app.open(window) |
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34 self._open_window = window |
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35 |
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36 def create_game_board(self): |
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37 """Create and open a gameboard window.""" |
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38 self.gameboard = gameboard.GameBoard(self.main_app, |
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39 self.level) |
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40 self.open_window(self.gameboard.get_top_widget()) |
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41 |
532 | 42 def switch_gameboard(self, new_gameboard): |
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43 """Switch over to a new gameboard.""" |
532 | 44 self.gameboard = new_gameboard |
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45 self.gameboard.disp = self.main_app |
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46 self.gameboard.create_display() |
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47 self.open_window(self.gameboard.get_top_widget()) |
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48 |
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49 def set_main_menu(self): |
151
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50 """Open the main menu""" |
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51 main_menu = mainmenu.make_main_menu(self.level) |
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52 self.open_window(main_menu) |
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53 |
179 | 54 def set_help_screen(self): |
55 """Open the main menu""" | |
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56 help_screen = helpscreen.make_help_screen(self.level) |
179 | 57 self.open_window(help_screen) |
58 | |
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59 def create_game_over(self): |
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60 """Create and open the Game Over window""" |
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61 level = self.gameboard.level |
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62 game_over = gameover.create_game_over(self.gameboard, level) |
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63 self.gameboard = None |
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64 self.open_window(game_over) |
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65 |
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66 def event(self, e): |
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67 return Game.event(self, e) |
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68 |
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69 |
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70 class MainMenuState(State): |
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71 def init(self): |
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72 sound.stop_background_music() |
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73 self.game.set_main_menu() |
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74 |
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75 def event(self, e): |
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76 if events_equal(e, START_DAY): |
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77 self.game.create_game_board() |
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78 return DayState(self.game) |
179 | 79 elif events_equal(e, GO_HELP_SCREEN): |
80 return HelpScreenState(self.game) | |
532 | 81 elif e.type is DO_LOAD_LEVEL: |
82 self.game.load_new_level(e.level) | |
83 return | |
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84 elif e.type is DO_LOAD_SAVEGAME: |
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85 self.game.switch_gameboard(e.gameboard) |
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86 e.gameboard.skip_next_start_day() |
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87 return DayState(self.game) |
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88 |
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89 self.game.main_app.event(e) |
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90 |
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91 def paint(self, screen): |
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92 screen.fill((0,0,0)) |
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93 self.game.main_app.paint(screen) |
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94 pygame.display.flip() |
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95 |
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96 def update(self, screen): |
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97 update = self.game.main_app.update(screen) |
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98 pygame.display.update(update) |
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99 |
179 | 100 class HelpScreenState(State): |
101 def init(self): | |
102 sound.stop_background_music() | |
103 self.game.set_help_screen() | |
104 | |
105 def event(self, e): | |
106 if e.type is KEYDOWN and e.key == K_ESCAPE: | |
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107 return MainMenuState(self.game) |
179 | 108 elif events_equal(e, GO_MAIN_MENU): |
109 return MainMenuState(self.game) | |
110 elif e.type is not QUIT: | |
111 self.game.main_app.event(e) | |
112 | |
113 def paint(self, screen): | |
114 screen.fill((0,0,0)) | |
115 self.game.main_app.paint(screen) | |
116 pygame.display.flip() | |
117 | |
118 def update(self, screen): | |
119 update = self.game.main_app.update(screen) | |
120 pygame.display.update(update) | |
121 | |
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122 |
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123 class DayState(State): |
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124 def init(self): |
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125 """Add some chickens to the farm""" |
99
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126 sound.stop_background_music() |
223 | 127 self.game.gameboard.start_day() |
30 | 128 |
98
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129 sound.play_sound("daybreak.ogg") |
29 | 130 # disable timer |
131 pygame.time.set_timer(MOVE_FOX_ID, 0) | |
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132 sound.background_music("daytime.ogg") |
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133 |
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134 def event(self, e): |
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135 if events_equal(e, START_NIGHT): |
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136 self.game.gameboard.reset_states() |
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137 return NightState(self.game) |
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138 elif events_equal(e, GO_GAME_OVER): |
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139 return GameOver(self.game) |
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140 elif events_equal(e, GO_MAIN_MENU): |
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141 return MainMenuState(self.game) |
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142 elif e.type is DO_LOAD_SAVEGAME: |
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143 self.game.switch_gameboard(e.gameboard) |
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144 return |
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145 |
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146 self.game.main_app.event(e) |
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147 |
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148 def paint(self, screen): |
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149 self.game.main_app.paint(screen) |
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150 pygame.display.flip() |
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151 |
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152 def update(self, screen): |
151
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153 self.game.gameboard.update() |
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154 update = self.game.main_app.update(screen) |
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155 pygame.display.update(update) |
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156 |
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157 def loop(self): |
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158 self.game.gameboard.loop() |
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159 |
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160 class NightState(State): |
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161 def init(self): |
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162 """Add some foxes to the farm""" |
99
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163 sound.stop_background_music() |
223 | 164 self.game.gameboard.start_night() |
30 | 165 |
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166 sound.play_sound("nightfall.ogg") |
422
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167 |
29 | 168 # Add a timer to the event queue |
169 self.cycle_count = 0 | |
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170 self.cycle_time = SLOW__SPEED |
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171 pygame.time.set_timer(MOVE_FOX_ID, self.cycle_time) |
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172 sound.background_music("nighttime.ogg") |
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173 |
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174 self.dialog = None |
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175 |
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176 def event(self, e): |
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177 if events_equal(e, START_DAY): |
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178 if self.game.gameboard.level.is_game_over(self.game.gameboard): |
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179 return GameOver(self.game) |
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180 return DayState(self.game) |
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181 elif events_equal(e, GO_GAME_OVER): |
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182 return GameOver(self.game) |
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183 elif events_equal(e, FAST_FORWARD): |
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184 if self.cycle_time > FAST__SPEED: |
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185 self.cycle_time = FAST__SPEED |
222
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186 else: |
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187 self.cycle_time = SLOW__SPEED |
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188 pygame.time.set_timer(MOVE_FOX_ID, self.cycle_time) |
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189 return |
29 | 190 elif e.type is MOVE_FOX_ID: |
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191 # ensure no timers trigger while we're running |
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192 pygame.time.set_timer(MOVE_FOX_ID, 0) |
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193 cur_time = pygame.time.get_ticks() |
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194 # Clear any queued timer events, so we don't full the queue |
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195 pygame.event.clear(MOVE_FOX_ID) |
237 | 196 # Ensure any outstanding animitions get cleaned up |
29 | 197 self.cycle_count += 1 |
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198 if self.cycle_count > constants.NIGHT_LENGTH: |
29 | 199 return pygame.event.post(START_DAY) |
396
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200 if self.game.gameboard.do_night_step(): |
122
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201 # All foxes are gone/safe, so dawn happens |
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202 return pygame.event.post(START_DAY) |
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203 # Re-enable timers |
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204 diff = pygame.time.get_ticks() - cur_time |
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205 time_left = self.cycle_time - diff |
513
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206 if time_left <= 0: |
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207 time_left = self.cycle_time |
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208 pygame.time.set_timer(MOVE_FOX_ID, time_left) |
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209 return |
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210 |
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211 self.game.main_app.event(e) |
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212 |
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213 def loop(self): |
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214 self.game.gameboard.loop() |
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215 |
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216 def paint(self, screen): |
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217 self.game.main_app.paint(screen) |
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218 pygame.display.flip() |
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219 |
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220 def update(self, screen): |
151
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221 self.game.gameboard.update() |
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222 update = self.game.main_app.update(screen) |
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223 pygame.display.update(update) |
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224 |
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225 class GameOver(State): |
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226 def init(self): |
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227 """Setup everything""" |
156
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228 sound.stop_background_music() |
151
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229 self.game.create_game_over() |
142
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230 pygame.time.set_timer(MOVE_FOX_ID, 0) |
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231 |
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232 def event(self, e): |
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233 if e.type is KEYDOWN: |
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234 if e.key == K_ESCAPE: |
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235 return MainMenuState(self.game) |
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236 elif events_equal(e, GO_MAIN_MENU): |
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237 return MainMenuState(self.game) |
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238 elif e.type is not QUIT: |
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239 self.game.main_app.event(e) |
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240 |
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241 def paint(self, screen): |
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242 screen.fill((0,0,0)) |
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243 self.game.main_app.paint(screen) |
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244 pygame.display.flip() |
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245 |
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246 def update(self, screen): |
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247 update = self.game.main_app.update(screen) |
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248 pygame.display.update(update) |
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249 |
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250 # pygame events |
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251 |
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252 def events_equal(e1, e2): |
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253 """Compare two user events.""" |
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254 return (e1.type is e2.type and e1.name == e2.name) |
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255 |
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256 START_DAY = pygame.event.Event(USEREVENT, name="START_DAY") |
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257 START_NIGHT = pygame.event.Event(USEREVENT, name="START_NIGHT") |
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258 GO_MAIN_MENU = pygame.event.Event(USEREVENT, name="GO_MAIN_MENU") |
179 | 259 GO_HELP_SCREEN = pygame.event.Event(USEREVENT, name="GO_HELP_SCREEN") |
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260 GO_GAME_OVER = pygame.event.Event(USEREVENT, name="GO_GAME_OVER") |
320
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261 FAST_FORWARD = pygame.event.Event(USEREVENT, name="FAST_FORWARD") |
29 | 262 MOVE_FOX_ID = USEREVENT + 1 |
263 MOVE_FOXES = pygame.event.Event(MOVE_FOX_ID, name="MOVE_FOXES") | |
504
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264 DO_LOAD_SAVEGAME = USEREVENT + 2 |
532 | 265 DO_LOAD_LEVEL = USEREVENT + 3 |
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266 QUIT = pygame.event.Event(QUIT) |
233
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267 |
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268 # Due to the way pgu's loop timing works, these will only get proceesed |
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269 # at intervals of 10ms, so there's no point in them not being multiples of 10 |
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270 FAST__SPEED=80 |
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271 SLOW__SPEED=200 |