erdslangetjie/__main__.py

   1 import kivy
   2 import pygame
   3
   4 kivy.require('1.6.0')
   5
   6 from kivy.app import App
   7 from kivy.uix.widget import Widget
   8 from kivy.logger import Logger, LoggerHistory
   9 from kivy.uix.relativelayout import RelativeLayout
  10 from kivy.uix.scrollview import ScrollView
  11 from kivy.uix.button import Button
  12 from kivy.graphics import Color, Rectangle
  13 from kivy.utils import platform
  14
  15 from erdslangetjie.level import LevelList
  16 from erdslangetjie.data import load_image
  17 from erdslangetjie.player import ThePlayer, Nemesis
  18 from erdslangetjie.constants import TILE_SIZE, QUIET
  19
  20
  21 class GameWindow(RelativeLayout):
  22
  23     def __init__(self, level_list, app):
  24         self.level_list = level_list
  25         self.level_obj = self.level_list.get_current_level()
  26         self.level_obj.load_tiles()
  27         self.tiles = {}
  28         self.view = app.root
  29         self.app = app
  30
  31         cols, rows = self.level_obj.get_size()
  32
  33         super(GameWindow, self).__init__(
  34                 size=(cols * TILE_SIZE, rows * TILE_SIZE),
  35                 size_hint=(None, None))
  36
  37         self.x_scroll_margin = float(TILE_SIZE) / self.view.size[0]
  38         self.y_scroll_margin = float(TILE_SIZE) / self.view.size[1]
  39
  40         self.mouse_move = False
  41
  42         self.player = ThePlayer()
  43         self.nemesis = Nemesis()
  44         if not self.level_obj.enter_pos:
  45             raise RuntimeError('No entry point')
  46         self.player_tile = None
  47         self.nemesis_tile = None
  48
  49         self.player.pos = self.level_obj.enter_pos
  50         if platform() != 'android':
  51             # Very hack'ish
  52             # We need to delay this import until after the window creation by
  53             # the app, else our size config doesn't work
  54             from kivy.core.window import Window
  55             self.keyboard = Window.request_keyboard(self._closed, self)
  56             self.keyboard.bind(on_key_down=self._on_key_down)
  57
  58     def build(self):
  59         self.clear_widgets()
  60         self.tiles = {}
  61         tiles = self.level_obj.get_tiles()
  62         bx, by = 0, 0
  63         for tile_line in tiles:
  64             bx = 0
  65             for tile in tile_line:
  66                 node = Widget(size=(TILE_SIZE, TILE_SIZE),
  67                         pos=(bx, by),
  68                         size_hint=(None, None))
  69                 self.add_widget(node)
  70                 with node.canvas:
  71                     Color(1, 1, 1)
  72                     Rectangle(pos=node.pos, size=node.size,
  73                             texture=tile.texture)
  74                 self.tiles[(bx, by)] = node
  75                 bx += TILE_SIZE
  76             by += TILE_SIZE
  77
  78     def draw_player(self):
  79         if self.player_tile:
  80             self.remove_widget(self.player_tile)
  81         sprite_pos = (self.player.pos[0] * TILE_SIZE,
  82                 self.player.pos[1] * TILE_SIZE)
  83         self.player_tile = Widget(size=(TILE_SIZE, TILE_SIZE),
  84                 pos=sprite_pos)
  85         with self.player_tile.canvas:
  86             Color(1, 1, 1)
  87             Rectangle(pos=sprite_pos, size=self.player_tile.size,
  88                     texture=self.player.get_texture())
  89         self.add_widget(self.player_tile)
  90         for offset in [(TILE_SIZE - 1, TILE_SIZE - 1),
  91                 (-TILE_SIZE + 1, TILE_SIZE - 1),
  92                 (TILE_SIZE - 1, -TILE_SIZE + 1),
  93                 (-TILE_SIZE + 1, -TILE_SIZE + 1),
  94                 (0, 2 * TILE_SIZE - 2),
  95                 (-2 * TILE_SIZE + 2, 0),
  96                 (2 * TILE_SIZE - 2, 0),
  97                 (0, -2 * TILE_SIZE + 2),
  98                 (0, 0)]:
  99             # Aim is to ensure a 'neighbourhood' around the player
 100             # is visible if possible
 101             check_point = (sprite_pos[0] + offset[0] + TILE_SIZE / 2,
 102                     sprite_pos[1] + offset[1] + TILE_SIZE / 2)
 103             true_point = self.to_parent(*check_point)
 104             if check_point[0] < 0:
 105                 continue
 106             if check_point[1] < 0:
 107                 continue
 108             if check_point[0] >= self.size[0]:
 109                 continue
 110             if check_point[1] >= self.size[1]:
 111                 continue
 112             while not self.included(true_point, 0):
 113                 # Scroll ourselves
 114                 if true_point[0] >= self.view.size[0]:
 115                     self.view.scroll_x += self.x_scroll_margin
 116                     true_point = self.to_parent(*check_point)
 117                     #print '-x', self.view.scroll_x, self.view.scroll_y
 118                 elif true_point[0] < 0:
 119                     self.view.scroll_x -= self.x_scroll_margin
 120                     true_point = self.to_parent(*check_point)
 121                     #print '+x', self.view.scroll_x, self.view.scroll_y
 122                 elif true_point[1] >= self.view.size[1]:
 123                     self.view.scroll_y += self.y_scroll_margin
 124                     true_point = self.to_parent(*check_point)
 125                     #print '+y', self.view.scroll_x, self.view.scroll_y
 126                 elif true_point[1] < 0:
 127                     self.view.scroll_y -= self.y_scroll_margin
 128                     true_point = self.to_parent(*check_point)
 129                     #print '-y', self.view.scroll_x, self.view.scroll_y
 130                 #print true_point, self.view.size
 131
 132     def included(self, point, margin):
 133         if point[0] < margin:
 134             return False
 135         if point[0] >= self.view.size[0] - margin:
 136             return False
 137         if point[1] < margin:
 138             return False
 139         if point[1] >= self.view.size[1] - margin:
 140             return False
 141         return True
 142
 143     def draw_nemesis(self):
 144         if not self.nemesis.on_board():
 145             return
 146         if self.nemesis_tile:
 147             self.remove_widget(self.nemesis_tile)
 148         sprite_pos = (self.nemesis.pos[0] * TILE_SIZE,
 149                 self.nemesis.pos[1] * TILE_SIZE)
 150         self.nemesis_tile = Widget(size=(TILE_SIZE, TILE_SIZE),
 151                 pos=sprite_pos)
 152         with self.nemesis_tile.canvas:
 153             Color(1, 1, 1)
 154             Rectangle(pos=sprite_pos, size=self.nemesis_tile.size,
 155                     texture=self.nemesis.get_texture())
 156         self.add_widget(self.nemesis_tile)
 157
 158     def _closed(self):
 159         self.keyboard.unbind(on_key_down=self._on_key_down)
 160
 161     def _on_key_down(self, keyboard, keycode, text, modifiers):
 162         # FIXME - likely portablity issues
 163         direction = None
 164         if keycode[0] == pygame.K_UP:
 165             direction = (0, 1)
 166         elif keycode[0] == pygame.K_DOWN:
 167             direction = (0, -1)
 168         elif keycode[0] == pygame.K_LEFT:
 169             direction = (-1, 0)
 170         elif keycode[0] == pygame.K_RIGHT:
 171             direction = (1, 0)
 172         if direction:
 173             self.do_move(direction)
 174
 175     def do_move(self, direction):
 176         self.nemesis.move(self.level_obj)
 177         self.draw_nemesis()
 178         self.player.move(direction, self.level_obj)
 179         self.draw_player()
 180         self.check_state()
 181         self.reset_timer()
 182
 183     def timed_move(self):
 184         self.nemesis.move(self.level_obj)
 185         self.draw_nemesis()
 186         self.check_state()
 187         self.reset_timer()
 188
 189     def reset_timer(self):
 190         pass
 191
 192     def check_state(self):
 193         if self.level_obj.at_exit(self.player.pos):
 194             # Jump to next level
 195             self.level_obj = self.level_list.advance_to_next_level()
 196             self.remove_widget(self.nemesis_tile)
 197             self.nemesis.reset_pos()
 198             if self.level_obj:
 199                 self.level_obj.load_tiles()
 200                 self.player.pos = self.level_obj.enter_pos
 201                 self.remove_widget(self.player_tile)
 202                 self.view.scroll_x = 0
 203                 self.view.scroll_y = 0
 204                 self.build()
 205                 self.draw_nemesis()
 206                 self.draw_player()
 207             else:
 208                 self.app.game_over(True)
 209         elif self.nemesis.pos == self.player.pos:
 210             # Caught
 211             self.app.game_over(False)
 212
 213     def _calc_mouse_pos(self, pos):
 214         pos = self.to_local(*pos)
 215         return (int(pos[0] / TILE_SIZE), int(pos[1] / TILE_SIZE))
 216
 217     def on_touch_down(self, touch):
 218         pos = self._calc_mouse_pos(touch.pos)
 219         if pos == self.player.pos:
 220             self.mouse_move = True
 221             self.mouse_start = pos
 222
 223     def on_touch_up(self, touch):
 224         self.mouse_move = False
 225
 226     def on_touch_move(self, touch):
 227         if self.mouse_move:
 228             pos = self._calc_mouse_pos(touch.pos)
 229             if (pos[0] - self.mouse_start[0] != 0) or (
 230                     pos[1] - self.mouse_start[1] != 0):
 231                 direction = (pos[0] - self.mouse_start[0],
 232                         pos[1] - self.mouse_start[1])
 233                 self.do_move(direction)
 234                 self.mouse_start = pos
 235
 236
 237 class Screen(Widget):
 238
 239     BACKGROUND = None
 240     START = 'Start'
 241
 242     def __init__(self, app):
 243         super(Screen, self).__init__()
 244         self.image = load_image(self.BACKGROUND)
 245         self.app = app
 246         with self.canvas:
 247             Rectangle(pos=(0, 0), size=(1026, 760),
 248                     texture=self.image.texture)
 249
 250         self.stop_button = Button(
 251                 text='Quit', size=(200, 40),
 252                 pos=((1026 - 200) / 2 - 100, 100))
 253         self.stop_button.bind(on_press=self.app.stop_app)
 254         self.start_button = Button(
 255                 text=self.START, size=(200, 40),
 256                 pos=((1026 - 200) / 2 + 100, 100))
 257         self.start_button.bind(on_press=self.app.start_game)
 258         self.add_widget(self.stop_button)
 259         self.add_widget(self.start_button)
 260
 261
 262 class IntroScreen(Screen):
 263
 264     BACKGROUND = 'screens/intro_screen.png'
 265     START = 'Start the Game'
 266
 267
 268 class WonScreen(Screen):
 269
 270     BACKGROUND = 'screens/won.png'
 271     START = 'Play again?'
 272
 273
 274 class LostScreen(Screen):
 275
 276     BACKGROUND = 'screens/lost.png'
 277     START = 'Retry?'
 278
 279
 280 class GameApp(App):
 281
 282     title = "Peter's thread snake"
 283
 284     def __init__(self):
 285         self.levels = LevelList()
 286         super(GameApp, self).__init__()
 287
 288     def build(self):
 289         root = ScrollView(size_hint=(None, None))
 290         return root
 291
 292     def on_start(self):
 293         from kivy.base import EventLoop
 294         window = EventLoop.window
 295         if platform() == 'android':
 296             window.fullscreen = True
 297         self.root.size = window.size
 298         self.make_intro()
 299
 300     def make_intro(self):
 301         self.root.clear_widgets()
 302         screen = IntroScreen(self)
 303         self.root.add_widget(screen)
 304
 305     def stop_app(self, button):
 306         self.stop()
 307
 308     def start_game(self, button):
 309         """Start the game"""
 310         game = GameWindow(self.levels, self)
 311         game.build()
 312         self.root.clear_widgets()
 313         self.root.add_widget(game)
 314         # Ensure the player is visible
 315         self.root.scroll_x = 0
 316         self.root.scroll_y = 0
 317         game.draw_player()
 318         game.draw_nemesis()
 319
 320     def game_over(self, won):
 321         if won:
 322             screen = WonScreen(self)
 323             self.levels.reset()
 324         else:
 325             screen = LostScreen(self)
 326         self.root.clear_widgets()
 327         self.root.add_widget(screen)
 328
 329
 330 def main():
 331     """ Erdslangetjie, a maze game of eluding nemesis
 332     """
 333     if QUIET:
 334         for hdlr in Logger.handlers[:]:
 335             if not isinstance(hdlr, LoggerHistory):
 336                 Logger.removeHandler(hdlr)
 337     GameApp().run()