def main():
# initialize tk window for embedding pygame
root = tk.Tk()
embed = tk.Frame(root, width=WINDOW_WIDTH, height=WINDOW_HEIGHT)
embed.pack(side=tk.LEFT)
os.environ['SDL_WINDOWID'] = str(embed.winfo_id())
root.update()
# initialize pygame
pygame.init()
# These are the only events we care about handling
pygame.event.set_allowed([KEYUP, KEYDOWN, MOUSEBUTTONDOWN, ACTIVEEVENT])
pygame.mouse.set_visible(True)
manager = StateManager(root)
root.protocol("WM_DELETE_WINDOW", manager.ask_quit)
# Main game loop
# We put root.update() in here so that pygame.display.update()
# doesn't interrupt tkinter's event handling
while not manager.quit:
t = time.clock()
manager.update()
manager.draw()
pygame.display.update()
root.update()
dt = 1000 * (time.clock() - t)
REAL_FPS = round(1000.0 / dt)
root.title(f"FPS: {min(REAL_FPS, FPS)}/{FPS}")
# The FPS is actually slightly more. This shouldn't matter.
root.after(max(1, round(FRAME_TIME - dt) - 1))
manager.terminate()
