a-robots-conundrum/robotgame/game.py

# This file is part of ROBOTGAME
#
# ROBOTGAME is free software: you can redistribute it and/or modify it under the
# terms of the GNU General Public License as published by the Free Software
# Foundation, either version 3 of the License, or (at your option) any later
# version.
#
# ROBOTGAME is distributed in the hope that it will be useful, but WITHOUT ANY
# WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
# A PARTICULAR PURPOSE.  See the GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License along with
# ROBOTGAME.  If not, see <http://www.gnu.org/licenses/>.
#
# ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' '
#
#                           game.py
#                     --------------------
#       date created : Tue Aug 7 2012
#          copyright : (C) 2012 Sakse Dalum
#      maintained by : Sakse Dalum <don_s@hongabar.org>

"""
The game. Handles everything.
"""

import os
import pygame

import robotgame
import jukebox
import level
import main_menu
import game_menu
import loader

class Game(object):
    """Create an object to handle the game."""
    def __init__(self, window, directory, disable_music,
                 running=False, speed=30, initial_goto_level=None):
        self.__dict__.update(locals())

        self.objs = []

        self.clock = pygame.time.Clock()

        self.ticks = self.prev_ticks = pygame.time.get_ticks()

        self.load()

    def start(self):
        self.running = True
        self.run()

    def stop(self):
        self.running = False

    def load(self):
        graphics_dir = os.path.join(self.directory, "resources", "graphics")
        self.loader = loader.Loader(graphics_dir)
        self.loader.load()

        self.level = None
        self.jukebox = jukebox.Jukebox(
            os.path.join(self.directory, "resources", "music"),
            ["basshit.ogg"])
        self.jukebox.stop()
        if not self.disable_music:
            self.jukebox.play()

        if not self.initial_goto_level:
            self.menu = main_menu.MainMenu(self, graphics_dir)
        else:
            self.goto_level(self.initial_goto_level)

    def run(self):
        t = pygame.time.get_ticks()
        dt = 0
        while self.running:
            dt = float(pygame.time.get_ticks() - t) / 1000
            t = pygame.time.get_ticks()
            self.update(t, dt)
            self.draw()
            self.clock.tick(self.speed)


    def goto_level(self, level):
        graphics_dir = os.path.join(self.directory, "resources", "graphics")

        self.menu = game_menu.GameMenu(self, graphics_dir)

        exec 'from level%d import Level%d as level' % (level, level)

        self.level = level(self, graphics_dir)
        self.objs.append(self.level)


    def update(self, t, dt):
        """
        Update all game objects.
        """
        # Retrieve and flush all events since last update call (this prevents
        # event "bottlenecking"/lock-ups)
        e = pygame.event.get()
        for event in e:
            # Stop the game when closing the window
            if event.type == pygame.QUIT:
                self.stop()

        # Keep the music playing!
        if not pygame.mixer.music.get_busy() and not self.disable_music:
            self.jukebox.play()

        # Update all objects
        for obj in self.objs[:]:
            if hasattr(obj, 'update'):
                obj.update(e, t, dt)

        self.menu.update(e, t, dt)

    def draw(self):
        """
        Draw all game objects.
        """
        self.window.fill((0, 0, 0))

        for obj in self.objs[:]:
            if hasattr(obj, 'draw'):
                obj.draw(self.window)
        self.menu.draw(self.window)

        pygame.display.flip()