Podejście obiektowe w pygame

WPROWADZENIE

Aplikację graficzną w pygame można zbudować korzystając z podejścia obiektowego.

# class2.py
import pygame

class Box(pygame.sprite.Sprite):

    def __init__(self, color, width, height):
        super().__init__()
        self.color = color
        self.image = pygame.Surface([width, height])   # powstaje surface
        self.image.fill(self.color)
        self.rect = self.image.get_rect()   # powstaje rect

    def update(self):
        self.image.fill(self.color)

class Game:

    def __init__(self):
        # INITIALIZE THE GAME
        pygame.init()   # to zawsze na starcie
        size = width, height = (400, 400)
        self.screen = pygame.display.set_mode(size)   # display Surface
        pygame.display.set_caption('Box')
        self.font = pygame.font.Font(None, 30)
        self.create_items()

        # CLOCK
        self.FPS = 60   # frames per second setting
        self.clock = pygame.time.Clock()

    def create_items(self):
        # LOAD IMAGES
        self.box = Box('white', 200, 200)
        self.box.rect.topleft = (100, 100)

    def handle_events(self):
        # HANDLE EVENTS
        for event in pygame.event.get():
            if event.type == pygame.QUIT:   # QUIT Event
                return False
            # Wykrywanie wcisniecia i puszczenia klawisza.
            elif event.type == pygame.KEYDOWN:
                if event.key == pygame.K_r:
                    self.box.color = 'red'
                elif event.key == pygame.K_g:
                    self.box.color = 'green'
                elif event.key == pygame.K_b:
                    self.box.color = 'blue'
                elif event.key == pygame.K_q:
                    return False
        return True

    def update(self):
        self.box.update()

    def draw(self):
        # DRAWING
        self.screen.fill('black')   # na nowo czarny ekran
        self.screen.blit(self.box.image, self.box.rect)
        pygame.display.flip()

    def play(self):
        # MAIN GAME LOOP
        running = True
        while running:
            running = self.handle_events()
            self.update()
            self.draw()
            self.clock.tick(self.FPS)

        pygame.quit()   # deactivates the Pygame library

if __name__ == "__main__":
    game = Game()
    game.play()
    # dalsze instrukcje bez pygame ...