erdslangetjie/__main__.py

   1 import sys
   2 import kivy
   3 import pygame
   4
   5 kivy.require('1.6.0')
   6
   7 from kivy.app import App
   8 from kivy.core.window import Window
   9 from kivy.uix.widget import Widget
  10 from kivy.logger import Logger, LoggerHistory
  11 from kivy.uix.relativelayout import RelativeLayout
  12 from kivy.uix.scrollview import ScrollView
  13 from kivy.graphics import Color, Rectangle
  14 from kivy.utils import platform
  15
  16 from erdslangetjie.level import LevelList
  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, view):
  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 = view
  29
  30         cols, rows = self.level_obj.get_size()
  31
  32         super(GameWindow, self).__init__(
  33                 size=(cols * TILE_SIZE, rows * TILE_SIZE),
  34                 size_hint=(None, None))
  35
  36         self.x_scroll_margin = float(TILE_SIZE) / self.view.size[0]
  37         self.y_scroll_margin = float(TILE_SIZE) / self.view.size[1]
  38
  39         self.mouse_move = False
  40
  41         self.player = ThePlayer()
  42         self.nemesis = Nemesis()
  43         if not self.level_obj.enter_pos:
  44             raise RuntimeError('No entry point')
  45         self.player_tile = None
  46         self.nemesis_tile = None
  47
  48         self.player.pos = self.level_obj.enter_pos
  49         if platform() != 'android':
  50             # Very hack'ish
  51             self.keyboard = Window.request_keyboard(self._closed, self)
  52             self.keyboard.bind(on_key_down=self._on_key_down)
  53
  54     def build(self):
  55         self.clear_widgets()
  56         self.tiles = {}
  57         tiles = self.level_obj.get_tiles()
  58         bx, by = 0, 0
  59         for tile_line in tiles:
  60             bx = 0
  61             for tile in tile_line:
  62                 node = Widget(size=(TILE_SIZE, TILE_SIZE),
  63                         pos=(bx, by),
  64                         size_hint=(None, None))
  65                 self.add_widget(node)
  66                 with node.canvas:
  67                     Color(1, 1, 1)
  68                     Rectangle(pos=node.pos, size=node.size,
  69                             texture=tile.texture)
  70                 self.tiles[(bx, by)] = node
  71                 bx += TILE_SIZE
  72             by += TILE_SIZE
  73
  74     def draw_player(self):
  75         if self.player_tile:
  76             self.remove_widget(self.player_tile)
  77         sprite_pos = (self.player.pos[0] * TILE_SIZE,
  78                 self.player.pos[1] * TILE_SIZE)
  79         self.player_tile = Widget(size=(TILE_SIZE, TILE_SIZE),
  80                 pos=sprite_pos)
  81         with self.player_tile.canvas:
  82             Color(1, 1, 1)
  83             Rectangle(pos=sprite_pos, size=self.player_tile.size,
  84                     texture=self.player.get_texture())
  85         self.add_widget(self.player_tile)
  86         for offset in [(TILE_SIZE - 1, TILE_SIZE - 1),
  87                 (-TILE_SIZE + 1, TILE_SIZE - 1),
  88                 (TILE_SIZE - 1, -TILE_SIZE + 1),
  89                 (-TILE_SIZE + 1, -TILE_SIZE + 1),
  90                 (0, 2 * TILE_SIZE - 2),
  91                 (-2 * TILE_SIZE + 2, 0),
  92                 (2 * TILE_SIZE - 2, 0),
  93                 (0, -2 * TILE_SIZE + 2),
  94                 (0, 0)]:
  95             # Aim is to ensure a 'neighbourhood' around the player
  96             # is visible if possible
  97             check_point = (sprite_pos[0] + offset[0] + TILE_SIZE / 2,
  98                     sprite_pos[1] + offset[1] + TILE_SIZE / 2)
  99             true_point = self.to_parent(*check_point)
 100             if check_point[0] < 0:
 101                 continue
 102             if check_point[1] < 0:
 103                 continue
 104             if check_point[0] >= self.size[0]:
 105                 continue
 106             if check_point[1] >= self.size[1]:
 107                 continue
 108             while not self.included(true_point, 0):
 109                 # Scroll ourselves
 110                 if true_point[0] >= self.view.size[0]:
 111                     self.view.scroll_x += self.x_scroll_margin
 112                     true_point = self.to_parent(*check_point)
 113                     #print '-x', self.view.scroll_x, self.view.scroll_y
 114                 elif true_point[0] < 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[1] >= self.view.size[1]:
 119                     self.view.scroll_y += self.y_scroll_margin
 120                     true_point = self.to_parent(*check_point)
 121                     #print '+y', self.view.scroll_x, self.view.scroll_y
 122                 elif true_point[1] < 0:
 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                 #print true_point, self.view.size
 127
 128     def included(self, point, margin):
 129         if point[0] < margin:
 130             return False
 131         if point[0] >= self.view.size[0] - margin:
 132             return False
 133         if point[1] < margin:
 134             return False
 135         if point[1] >= self.view.size[1] - margin:
 136             return False
 137         return True
 138
 139     def draw_nemesis(self):
 140         if not self.nemesis.on_board():
 141             return
 142         if self.nemesis_tile:
 143             self.remove_widget(self.nemesis_tile)
 144         sprite_pos = (self.nemesis.pos[0] * TILE_SIZE,
 145                 self.nemesis.pos[1] * TILE_SIZE)
 146         self.nemesis_tile = Widget(size=(TILE_SIZE, TILE_SIZE),
 147                 pos=sprite_pos)
 148         with self.nemesis_tile.canvas:
 149             Color(1, 1, 1)
 150             Rectangle(pos=sprite_pos, size=self.nemesis_tile.size,
 151                     texture=self.nemesis.get_texture())
 152         self.add_widget(self.nemesis_tile)
 153
 154     def _closed(self):
 155         self.keyboard.unbind(on_key_down=self._on_key_down)
 156
 157     def _on_key_down(self, keyboard, keycode, text, modifiers):
 158         # FIXME - likely portablity issues
 159         direction = None
 160         if keycode[0] == pygame.K_UP:
 161             direction = (0, 1)
 162         elif keycode[0] == pygame.K_DOWN:
 163             direction = (0, -1)
 164         elif keycode[0] == pygame.K_LEFT:
 165             direction = (-1, 0)
 166         elif keycode[0] == pygame.K_RIGHT:
 167             direction = (1, 0)
 168         if direction:
 169             self.do_move(direction)
 170
 171     def do_move(self, direction):
 172         self.nemesis.move(self.level_obj)
 173         self.draw_nemesis()
 174         self.player.move(direction, self.level_obj)
 175         self.draw_player()
 176         self.check_state()
 177
 178     def check_state(self):
 179         if self.level_obj.at_exit(self.player.pos):
 180             # Jump to next level
 181             self.level_obj = self.level_list.advance_to_next_level()
 182             self.remove_widget(self.nemesis_tile)
 183             self.nemesis.reset_pos()
 184             if self.level_obj:
 185                 self.level_obj.load_tiles()
 186                 self.player.pos = self.level_obj.enter_pos
 187                 self.remove_widget(self.player_tile)
 188                 self.view.scroll_x = 0
 189                 self.view.scroll_y = 0
 190                 self.build()
 191                 self.draw_nemesis()
 192                 self.draw_player()
 193             else:
 194                 print 'You won!'
 195                 sys.exit(1)
 196         elif self.nemesis.pos == self.player.pos:
 197             # Caught
 198             print 'You lost!'
 199             sys.exit(1)
 200
 201     def _calc_mouse_pos(self, pos):
 202         pos = self.to_local(*pos)
 203         return (int(pos[0] / TILE_SIZE), int(pos[1] / TILE_SIZE))
 204
 205     def on_touch_down(self, touch):
 206         pos = self._calc_mouse_pos(touch.pos)
 207         if pos == self.player.pos:
 208             self.mouse_move = True
 209             self.mouse_start = pos
 210
 211     def on_touch_up(self, touch):
 212         self.mouse_move = False
 213
 214     def on_touch_move(self, touch):
 215         if self.mouse_move:
 216             pos = self._calc_mouse_pos(touch.pos)
 217             if (pos[0] - self.mouse_start[0] != 0) or (
 218                     pos[1] - self.mouse_start[1] != 0):
 219                 direction = (pos[0] - self.mouse_start[0],
 220                         pos[1] - self.mouse_start[1])
 221                 self.do_move(direction)
 222                 self.mouse_start = pos
 223
 224
 225 class GameApp(App):
 226
 227     title = "Peter's thread snake"
 228
 229     def __init__(self):
 230         self.levels = LevelList()
 231         super(GameApp, self).__init__()
 232
 233     def build(self):
 234         root = ScrollView(size_hint=(None, None))
 235         return root
 236
 237     def on_start(self):
 238         from kivy.base import EventLoop
 239         window = EventLoop.window
 240         if platform() == 'android':
 241             window.fullscreen = True
 242         self.root.size = window.size
 243         game = GameWindow(self.levels, self.root)
 244         game.build()
 245         self.root.add_widget(game)
 246         # Ensure the player is visible
 247         self.root.scroll_x = 0
 248         self.root.scroll_y = 0
 249         game.draw_player()
 250         game.draw_nemesis()
 251
 252
 253 def main():
 254     """ Erdslangetjie, a maze game of eluding nemesis
 255     """
 256     if QUIET:
 257         for hdlr in Logger.handlers[:]:
 258             if not isinstance(hdlr, LoggerHistory):
 259                 Logger.removeHandler(hdlr)
 260     GameApp().run()