如何在“游戏菜单”中创建 pygame

Question

I'm making a pygame game where currently a character is moving around on a screen. I want the character to be able to buy items when he stands on top of a shop. I want a menu like screen to appear when the character is on top of the shop. I also want the rest of the game to continue in the background in case I decide to add some enemies. shop_items is the function that should run for the in game menu, showing the items available.I'm providing the whole code below. Any help is appreciated, thank you.

import pygame
pygame.font.init()

width = 800
height = 600

screen = pygame.display.set_mode([width, height])

walkRight = [pygame.image.load('R1.png'), pygame.image.load('R2.png'), pygame.image.load('R3.png'), pygame.image.load('R4.png'), pygame.image.load('R5.png'), pygame.image.load('R6.png'), pygame.image.load('R7.png'), pygame.image.load('R8.png'), pygame.image.load('R9.png')]
walkLeft = [pygame.image.load('L1.png'), pygame.image.load('L2.png'), pygame.image.load('L3.png'), pygame.image.load('L4.png'), pygame.image.load('L5.png'), pygame.image.load('L6.png'), pygame.image.load('L7.png'), pygame.image.load('L8.png'), pygame.image.load('L9.png')]
char = pygame.image.load('standing.png')


x = 50
y = 50
width = 40
height = 60
vel = 5
isJump = False
jumpCount = 10
left = False
right = False
down = False
up = False
walkCount = 0
shop = pygame.transform.scale(pygame.image.load("shop.png"), (60,60))

clock = pygame.time.Clock()
FPS = 60



def shop_items():
    if x + char.get_width() < 60 and y + char.get_height() < 60:
        screen.fill([0,0,0])

def redrawGameWindow():
    global walkCount

    screen.fill([166, 166, 166])  
    screen.blit(shop, (0,0))

    if walkCount + 1 >= 27:
        walkCount = 0

    if left:  
        screen.blit(walkLeft[walkCount//3], (x,y))
        walkCount += 1 

    elif right:
        screen.blit(walkRight[walkCount//3], (x,y))
        walkCount += 1

    elif down:
        screen.blit(char,(x,y))
        walkcount = 0

    elif up :
        screen.blit(char, (x,y))
        walkcount = 0

    else:
        screen.blit(char, (x, y))
        walkCount = 0

    pygame.display.update() 


def main():
    run = True

    pygame.display.set_caption("bomb-mania")


    global x
    global y
    global width
    global height
    global vel

    global isJump
    global jumpCount

    global left
    global right
    global down

    global walkCount    

    while run:

        for event in pygame.event.get():
            if event.type == pygame.QUIT:
                run = False

        keys = pygame.key.get_pressed()

        if keys[pygame.K_LEFT] and x > vel-15:
            x -= vel
            left = True
            right = False
            down = False
            up = False



        elif keys[pygame.K_RIGHT] and x < 800 - vel - width:
            x += vel
            left = False
            right = True
            down = False
            up = False

        elif keys[pygame.K_DOWN] and y < 600 - height:
            y += vel
            left = False
            right = False
            down = True
            up = False


        elif keys[pygame.K_UP] and y > vel-15:
            y -= vel
            left = False
            right = False
            down = False
            up = True

        else:
            left = False
            right = False
            down = False
            up = False
            walkCount = 0

        if x + char.get_width() < 60 and y + char.get_height() < 60:
            # print("reached")
            shop_items()


        redrawGameWindow()

        clock.tick(FPS)
        pygame.display.flip()


main()

Answer 1

I assume something like they have in League of Legends? :) You need to add a function to your main loop, something like:

shop = False
def toggle_shop():
    if player.rect.colliderect(shop.rect) and key_pressed():
        if shop:
            shop = True
        else:
            shop = False


def display_shop():
    # Run code to display your shop

In your main loop it would look something like:

shop = False
main():
    toggle_shop()
    if shop:
        display_shop()
    ...

Inside of the toggle_shop() function, I wrote I key_pressed() function. If you need help with that, there is a great functionality of pygame called pygame.event: https://www.pygame.org/docs/ref/event.html Use this line:

events = pygame.event.get()
for event in events:
    if event.type == pygame.KEYDOWN:
         # Test which key was pressed

Hope this helps and good luck!

In response to the follow up question- look at the fourth and fifth line:

shop = pygame.transform.scale(pygame.image.load("shop.png"), (60,60))
toggle_shop = False
def toggle_shop():
    shop_rect = shop.get_rect()  # This will return a pygame.Rect object
    if player.rect.colliderect(shop_rect) and key_pressed():  # Alter this line accordingly- shop_rect rather than shop.rect
        if toggle_shop:
            toggle_shop = True
        else:
            toggle_shop = False

One more note- generally it isn't good practice to name variables the same as functions. Maybe change the "toggle_shop" Boolean variable to "shop_state" or "shop_active".