Pyglet Game App Template

main.py

#  main.py
#  
#  Copyright 2015 Ericson Willians (Rederick Deathwill) <EricsonWRP@ERICSONWRP-PC>
#  
#  This program 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 2 of the License, or
#  (at your option) any later version.
#  
#  This program 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 this program; if not, write to the Free Software
#  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
#  MA 02110-1301, USA.
#  
#  
  
import os
import pyglet
import json

class Serializable:

    def __init__(self):
        self.file = None
        
    def serialize(self, path, mode):    
        try:
            self.file = open(path, mode)
        except:
            raise FileNotFoundError()
        if self.file:
            return self.file

class App(Serializable, pyglet.window.Window):

    def __init__(self):
        Serializable.__init__(self)
        if os.path.isfile("config.txt"):
            self.data = self.load("config.txt")
        else:
            self.data = {
                    "SCREEN_WIDTH": 1024,
                    "SCREEN_HEIGHT": 768,
                    "SQUARE_SIZE": 32,
                    "GAME_SPEED": 0.1,
                    "FULLSCREEN": False,
                    "LOCKED_MOUSE": True}
        self.write("config.txt")
        pyglet.window.Window.__init__(self, self.data["SCREEN_WIDTH"], 
                                            self.data["SCREEN_HEIGHT"], 
                                            fullscreen=self.data["FULLSCREEN"])
        if self.data["LOCKED_MOUSE"]:
            self.set_exclusive_mouse()

    def write(self, path):
        self.serialize(path, "w").write(json.dumps(self.data))
        
    def load(self, path):
        json_data = open(path, "r")
        self.data = json.load(json_data)
        json_data.close()
        return self.data

if __name__ == '__main__':
    app = App()
    label = pyglet.text.Label("Hello World!",
                              font_name = "Times New Roman",
                              font_size=100,
                              x = app.width // 2, y = app.height // 2,
                              anchor_x = "center", anchor_y = "center")
                              
    @app.event
    def on_draw():
        app.clear()
        label.draw()
    
    pyglet.app.run()