[Pygame]：游戏视图不会改变

Question

我在pygame中使用MVC arquitecture进行游戏，但是当我尝试从菜单视图（起始视图）转换到游戏视图时，屏幕将继续显示菜单视图而不是更改。 / p>

以下是观点类：

pygame.init()

class MainDisplay:
    # Handles current view and all it's events and acts as broker between views
    def __init__(self, view):
        self.current_view = view

    def draw(self):
        self.current_view.drawAll()

    def functions(self):
        self.current_view.functions()

class MenuDisplay:
    # Menu View
    def __init__(self):
        self.button = pygame.image.load("src/trans-button.png")
        self.button = pygame.transform.scale(self.button, (display_width - 84, 70))
        self.start_button = self.button
        self.tutorial_button = self.button
        self.top10_button = self.button
        self.salir_button = self.button
        self.initial_pos = 220
        self.event_i = self.event_g = self.event_t = self.event_e = False
        self.text_color = (255,255,0)

    def checkSelection(self, posX, startPosY, endPosY):
        # We get the mouse coordinates
        self.mouse_x, self.mouse_y = pygame.mouse.get_pos()

        # Then proceed to evaluate it position in relation with the buttons
        if(self.mouse_x >= posX and self.mouse_x <= self.button.get_width() + posX and self.mouse_y >= startPosY and self.mouse_y <= endPosY):
            return True

    def functions(self):
        # We set the initial position to it's default
        self.initial_pos = 220

        # checkSelection(posX, startPosY, endPosY)
        self.event_i = self.checkSelection(42, self.initial_pos, self.initial_pos + self.button.get_height())
        self.event_e = self.checkSelection(42, self.initial_pos + self.button.get_height()*3 + 75, self.initial_pos + self.button.get_height()*4 + 75)

        if self.event_i:
            print 'Begin'
            current_display = GameDisplay()
        if self.event_e:
            pygame.quit()
            quit()
            sys.exit()

        self.event_i = self.event_g = self.event_t = self.event_e = False

    def drawButtons(self):
        # Draws the button elements from the Menu view
        self.initial_pos = 220

        window.blit(self.start_button, (42,self.initial_pos))
        window.blit(self.tutorial_button, (42,self.initial_pos + self.button.get_height() + 25))
        window.blit(self.top10_button, (42,self.initial_pos + self.button.get_height()*2 + 50))
        window.blit(self.salir_button, (42,self.initial_pos + self.button.get_height()*3 + 75))

    def drawText(self):
        # Draws the texts elements for the buttons
        self.initial_pos = 220 + 25

        # Setting Text
        self.start_text = 'Inicar Partida'
        self.tutorial_text = 'Como Jugar'
        self.top10_text = 'Top 10'
        self.salir_text = 'Salir del Juego'

        # Setting Font
        self.myfont = pygame.font.SysFont("Verdana", 19)
        self.myfont.set_bold(True)

        # Render Text
        self.start = self.myfont.render(self.start_text, 1, self.text_color)
        self.tutorial = self.myfont.render(self.tutorial_text, 1, self.text_color)
        self.top10 = self.myfont.render(self.top10_text, 1, self.text_color)
        self.salir = self.myfont.render(self.salir_text, 1, self.text_color)

        # Ajustamos la posicion XY del texto para que este en el medio del boton
        self.textPosX = (display_width/2) - (self.start.get_width()/2) - 21
        self.textPosY = self.initial_pos - 5

        window.blit(self.start, (self.textPosX,self.textPosY))

        self.textPosX = (display_width/2) - (self.tutorial.get_width()/2) - 21

        window.blit(self.tutorial, (self.textPosX, self.initial_pos + self.button.get_height() + 25 -5))

        self.textPosX = (display_width/2) - (self.top10.get_width()/2) - 21

        window.blit(self.top10, (self.textPosX, self.initial_pos + self.button.get_height()*2 + 50 -5))

        self.textPosX = (display_width/2) - (self.salir.get_width()/2) - 21

        window.blit(self.salir, (self.textPosX, self.initial_pos + self.button.get_height()*3 + 75 -5))

    def drawAll(self):
        # Executes all the draw functions
        self.drawButtons()
        self.drawText()


class GameDisplay():
    # Game view
    def __init__(self):
        print 'Hello World'
        self.button = pygame.image.load("src/trans-button.png")
        self.button = pygame.transform.scale(self.button, ((display_width/2) - 40, 65))
        self.return_button = pygame.transform.scale(self.button, (75, 20))
        self.event_r = False

    def drawButtons(self):

        self.initial_pos_y = 0
        self.initial_pos_x = display_width - 75

        window.blit(self.return_button, (initial_pos_y, initial_pos_x))

    def drawAll(self):
        # Executes all the draw functions
        self.drawButtons()

    def checkSelection(self, posX, startPosY, endPosY):
        # We get the mouse coordinates
        self.mouse_x, self.mouse_y = pygame.mouse.get_pos()

        # Then proceed to evaluate it position in relation with the buttons
        if(self.mouse_x >= posX and self.mouse_x <= self.button.get_width() + posX and self.mouse_y >= startPosY and self.mouse_y <= endPosY):
            return True

    def functions(self):
        # We set the initial position to it's default
        self.initial_pos_y = 0
        self.initial_pos_x = display_width - 75

        # checkSelection(posX, startPosY, endPosY)
        self.event_r = self.checkSelection(initial_pos_x, self.initial_pos_y, self.initial_pos_y - self.return_button.get_height())

MainDisplay类负责处理每个视图之间的转换，因为我打算在将来添加更多视图。当应用程序启动时，我创建了一个名为current_display的新MainDisplay，它接收起始视图作为参数。

# Setting up Display
current_display = MainDisplay(MenuDisplay())

执行的是主循环。

crashed = False

# Game Loop
while not crashed:
    for event in pygame.event.get():
        if event.type == pygame.QUIT:
            crashed = True
        if event.type == pygame.MOUSEBUTTONDOWN:
            current_display.functions()

    window.blit(background, (0,0))
    current_display.draw()
    pygame.display.update()
    clock.tick(60)

#End Game
pygame.quit()
quit()
sys.exit()

第一个视图就像一个魅力。

当用户点击开始按钮时，它应该转到下一个视图，我处理它的点击事件，检查鼠标位置是否与按钮位置发生碰撞。

def functions(self):
    # We set the initial position to it's default
    self.initial_pos = 220

    # checkSelection(posX, startPosY, endPosY)
    self.event_i = self.checkSelection(42, self.initial_pos, self.initial_pos + self.button.get_height())
    self.event_e = self.checkSelection(42, self.initial_pos + self.button.get_height()*3 + 75, self.initial_pos + self.button.get_height()*4 + 75)

    if self.event_i:
        print 'Begin'
        current_display = GameDisplay()
    if self.event_e:
        pygame.quit()
        quit()
        sys.exit()

    self.event_i = self.event_g = self.event_t = self.event_e = False

def checkSelection(self, posX, startPosY, endPosY):
        # We get the mouse coordinates
        self.mouse_x, self.mouse_y = pygame.mouse.get_pos()

        # Then proceed to evaluate it position in relation with the buttons
        if(self.mouse_x >= posX and self.mouse_x <= self.button.get_width() + posX and self.mouse_y >= startPosY and self.mouse_y <= endPosY):
            return True

为了确保事件发生，我添加了一个打印用于调试。 GameDisplay __ init __确实有效，因为＆＃39; Hello World＆＃39;消息确实显示，但UI视图不会改变。

以下是完整的代码：

import pygame
import sys
from random import randint

pygame.init()

class MainDisplay:
    # Handles current view and all it's events and acts as broker between views
    def __init__(self, view):
        self.current_view = view

    def draw(self):
        self.current_view.drawAll()

    def functions(self):
        self.current_view.functions()

class MenuDisplay:
    # Menu View
    def __init__(self):
        self.button = pygame.image.load("src/trans-button.png")
        self.button = pygame.transform.scale(self.button, (display_width - 84, 70))
        self.start_button = self.button
        self.tutorial_button = self.button
        self.top10_button = self.button
        self.salir_button = self.button
        self.initial_pos = 220
        self.event_i = self.event_g = self.event_t = self.event_e = False
        self.text_color = (255,255,0)

    def checkSelection(self, posX, startPosY, endPosY):
        # We get the mouse coordinates
        self.mouse_x, self.mouse_y = pygame.mouse.get_pos()

        # Then proceed to evaluate it position in relation with the buttons
        if(self.mouse_x >= posX and self.mouse_x <= self.button.get_width() + posX and self.mouse_y >= startPosY and self.mouse_y <= endPosY):
            return True

    def functions(self):
        # We set the initial position to it's default
        self.initial_pos = 220

        # checkSelection(posX, startPosY, endPosY)
        self.event_i = self.checkSelection(42, self.initial_pos, self.initial_pos + self.button.get_height())
        self.event_e = self.checkSelection(42, self.initial_pos + self.button.get_height()*3 + 75, self.initial_pos + self.button.get_height()*4 + 75)

        if self.event_i:
            print 'Begin'
            current_display = GameDisplay()
        if self.event_e:
            pygame.quit()
            quit()
            sys.exit()

        self.event_i = self.event_g = self.event_t = self.event_e = False

    def drawButtons(self):
        # Draws the button elements from the Menu view
        self.initial_pos = 220

        window.blit(self.start_button, (42,self.initial_pos))
        window.blit(self.tutorial_button, (42,self.initial_pos + self.button.get_height() + 25))
        window.blit(self.top10_button, (42,self.initial_pos + self.button.get_height()*2 + 50))
        window.blit(self.salir_button, (42,self.initial_pos + self.button.get_height()*3 + 75))

    def drawText(self):
        # Draws the texts elements for the buttons
        self.initial_pos = 220 + 25

        # Setting Text
        self.start_text = 'Inicar Partida'
        self.tutorial_text = 'Como Jugar'
        self.top10_text = 'Top 10'
        self.salir_text = 'Salir del Juego'

        # Setting Font
        self.myfont = pygame.font.SysFont("Verdana", 19)
        self.myfont.set_bold(True)

        # Render Text
        self.start = self.myfont.render(self.start_text, 1, self.text_color)
        self.tutorial = self.myfont.render(self.tutorial_text, 1, self.text_color)
        self.top10 = self.myfont.render(self.top10_text, 1, self.text_color)
        self.salir = self.myfont.render(self.salir_text, 1, self.text_color)

        # Ajustamos la posicion XY del texto para que este en el medio del boton
        self.textPosX = (display_width/2) - (self.start.get_width()/2) - 21
        self.textPosY = self.initial_pos - 5

        window.blit(self.start, (self.textPosX,self.textPosY))

        self.textPosX = (display_width/2) - (self.tutorial.get_width()/2) - 21

        window.blit(self.tutorial, (self.textPosX, self.initial_pos + self.button.get_height() + 25 -5))

        self.textPosX = (display_width/2) - (self.top10.get_width()/2) - 21

        window.blit(self.top10, (self.textPosX, self.initial_pos + self.button.get_height()*2 + 50 -5))

        self.textPosX = (display_width/2) - (self.salir.get_width()/2) - 21

        window.blit(self.salir, (self.textPosX, self.initial_pos + self.button.get_height()*3 + 75 -5))

    def drawAll(self):
        # Executes all the draw functions
        self.drawButtons()
        self.drawText()


class GameDisplay():
    # Game view
    def __init__(self):
        print 'Hello World'
        self.button = pygame.image.load("src/trans-button.png")
        self.button = pygame.transform.scale(self.button, ((display_width/2) - 40, 65))
        self.return_button = pygame.transform.scale(self.button, (75, 20))
        self.event_r = False

    def drawButtons(self):

        self.initial_pos_y = 0
        self.initial_pos_x = display_width - 75

        window.blit(self.return_button, (initial_pos_y, initial_pos_x))

    def drawAll(self):
        # Executes all the draw functions
        self.drawButtons()

    def checkSelection(self, posX, startPosY, endPosY):
        # We get the mouse coordinates
        self.mouse_x, self.mouse_y = pygame.mouse.get_pos()

        # Then proceed to evaluate it position in relation with the buttons
        if(self.mouse_x >= posX and self.mouse_x <= self.button.get_width() + posX and self.mouse_y >= startPosY and self.mouse_y <= endPosY):
            return True

    def functions(self):
        # We set the initial position to it's default
        self.initial_pos_y = 0
        self.initial_pos_x = display_width - 75

        # checkSelection(posX, startPosY, endPosY)
        self.event_r = self.checkSelection(initial_pos_x, self.initial_pos_y, self.initial_pos_y - self.return_button.get_height())

# Display Settings
display_width = 830
display_height = 625

window = pygame.display.set_mode((display_width, display_height))

pygame.display.set_caption("This is my Game")

clock = pygame.time.Clock()

# Background Settings
background = pygame.image.load("src/background.jpg")
background = pygame.transform.scale(background, (display_width, display_height))

# Setting up Display
current_display = MainDisplay(MenuDisplay())

crashed = False

# Game Loop
while not crashed:
    for event in pygame.event.get():
        if event.type == pygame.QUIT:
            crashed = True
        if event.type == pygame.MOUSEBUTTONDOWN:
            current_display.functions()

    window.blit(background, (0,0))
    current_display.draw()
    pygame.display.update()
    clock.tick(60)

#End Game
pygame.quit()
quit()
sys.exit()

Answer 1

错误是因为我错过了a）

非常感谢马丁。