Menú clicable¶

from entities import Player
import pygame as pg
import sys


class Scene:
    def __init__(self, game):
        self.game = game

    def events(self, events):
        raise NotImplementedError("events must be defined")

    def update(self, dt):
        raise NotImplementedError("update must be defined")

    def draw(self, display):
        raise NotImplementedError("draw must be defined")


class MenuScene(Scene):
    def __init__(self, game):
        super().__init__(game)
        self.font = pg.font.Font('res/fonts/04B03.ttf', 48)

        self.text_play = self.font.render("JUGAR", True, (255, 255, 255))
        self.text_play_rect = self.text_play.get_rect()
        self.text_play_rect.topleft = (400, 100)

        self.text_credits = self.font.render("CREDITOS", True, (255, 255, 255))
        self.text_credits_rect = self.text_credits.get_rect()
        self.text_credits_rect.topleft = (400, 175)

        self.text_exit = self.font.render("SALIR", True, (255, 255, 255))
        self.text_exit_rect = self.text_exit.get_rect()
        self.text_exit_rect.topleft = (400, 250)

        self.text_option = self.font.render(">", True, (255, 255, 255))
        self.text_option_rect = self.text_option.get_rect()

        self.option = -1

    def events(self, events):
        for event in events:
            if event.type == pg.MOUSEBUTTONDOWN:
                if self.option == 0:
                    # El cambio de cursor común mejor en Game.change_scene
                    # pg.mouse.set_cursor(pg.SYSTEM_CURSOR_ARROW)
                    self.game.change_scene(MainScene(self.game))
                elif self.option == 1:
                    print("ESCENA DE CRÉDITOS")
                elif self.option == 2:
                    sys.exit()

    def update(self, dt):
        mouse_pos = pg.mouse.get_pos()

        if self.text_play_rect.collidepoint(mouse_pos):
            self.text_option_rect.topleft = (360, 100)
            self.option = 0
        elif self.text_credits_rect.collidepoint(mouse_pos):
            self.text_option_rect.topleft = (360, 175)
            self.option = 1
        elif self.text_exit_rect.collidepoint(mouse_pos):
            self.text_option_rect.topleft = (360, 250)
            self.option = 2
        else:
            self.option = -1

    def draw(self, display):
        display.fill((0, 0, 0))
        display.blit(self.text_play, self.text_play_rect)
        display.blit(self.text_credits, self.text_credits_rect)
        display.blit(self.text_exit, self.text_exit_rect)

        if self.option >= 0:
            display.blit(self.text_option, self.text_option_rect)


class MainScene(Scene):
    def __init__(self, game):
        super().__init__(game)
        self.background = pg.image.load("res/images/grass.png").convert_alpha()
        self.common_group = pg.sprite.Group()
        self.common_group.add(Player(325, 150))

    def events(self, events):
        for event in events:
            if event.type == pg.KEYDOWN:
                if event.key == pg.K_ESCAPE:
                    self.game.change_scene(MenuScene(self.game))

    def update(self, dt):
        self.common_group.update(dt)

    def draw(self, display):
        display.blit(self.background, (0, 0))
        self.common_group.draw(display)