How do you write what you want to happen while game_state is "game" in pygame?

Question

I asked you how to make a main menu window and a game window, buttons, and more. Okay, done. This is the code so far:

import pygame
from pygame.locals import *

pygame.init()

win = pygame.display.set_mode((800, 600))
win.fill((0, 180, 210))

pygame.display.set_caption("Baloon War!")
icon = pygame.image.load("Baloon war icon.png")
pygame.display.set_icon(icon)

class button():
    def __init__(self, color, x, y, width, height, text=''):
        self.color = color
        self.x = x
        self.y = y
        self.width = width
        self.height = height
        self.text = text

    def draw(self, win, outline=None):
        # Call this method to draw the button on the screen
        if outline:
            pygame.draw.rect(win, outline, (self.x - 2, self.y - 2, self.width + 4, self.height + 4), 0)

        pygame.draw.rect(win, self.color, (self.x, self.y, self.width, self.height), 0)

        if self.text != '':
            font = pygame.font.SysFont('comicsans', 60)
            text = font.render(self.text, 1, (0, 0, 0))
            win.blit(text, (self.x + (self.width / 2 - text.get_width() / 2), self.y + (self.height / 2 - text.get_height() / 2)))

    def isOver(self, pos):
        # Pos is the mouse position or a tuple of (x,y) coordinates
        if pos[0] > self.x and pos[0] < self.x + self.width:
            if pos[1] > self.y and pos[1] < self.y + self.height:
                return True

        return False

def redrawMenuWindow():
    win.fill((0, 255, 110))
    greenButton.draw(win, (0, 0, 0))
    redButton.draw(win, (0, 0, 0))

def redrawGameWindow():
    win.fill((0, 180, 210))

greenButton = button((0, 255, 0), 280, 255, 250, 100, "Start")
redButton = button ((255, 0, 0), 280, 380, 250, 100, "Quit")

game_state = "menu"
run = True
while run:
    if game_state == "menu":
        redrawMenuWindow()
    elif game_state == "game":
        redrawGameWindow()
    pygame.display.update()

    for event in pygame.event.get():
        pos = pygame.mouse.get_pos()

        if event.type == pygame.QUIT:
            run = False
            pygame.quit()
            quit()

        if event.type == pygame.MOUSEBUTTONDOWN:
            if greenButton.isOver(pos):
                print("clicked the button")
                game_state = "game"
            if redButton.isOver(pos):
                print("clicked the 2button")
                run = False
                pygame.quit()
                quit()


        if event.type == pygame.MOUSEMOTION:
            if greenButton.isOver(pos):
                greenButton.color = (105, 105, 105)
            else:
                greenButton.color = (0, 255, 0)
            if redButton.isOver(pos):
                redButton.color = (105, 105, 105)
            else:
                redButton.color = (255, 0, 0)

So then I wanted to make my main game part. After pressing the Start/greenButton the game_state is "game". But how do I write what the game should be like, where???? I didn't know how so I wrote this:

game_state = "game"
while game_state is "game":

    redrawGameWindow():

But this just doesn't work. Anyone here that can explain me how to do it?

score 1 · Accepted Answer · answered May 18 '20 at 06:43

You have to put the game implementation in redrawGameWindow. You don't need any extra loop.

You have to draw the scene dependent on the state of the game redrawMenuWindowin redrawGameWindow. Note you can have more than 2 game states, then you'll need more functions, which draw the scene dependent on the state.

def redrawMenuWindow():
    win.fill((0, 255, 110))

    # draw menu
    # [...]

def redrawGameWindow():
    win.fill((0, 180, 210))

    # draw main game part
    # [...]

game_state = "menu"
run = True
while run:

    if game_state == "menu":
        redrawMenuWindow()
    elif game_state == "game":
        redrawGameWindow()
    # elif game_state == "gameover":
    #    redrawGameoverWindow()  

    pygame.display.update()

    # [...]

And you have to handle the event dependent on the state of the game:

while run:

    # [...]

    for event in pygame.event.get():
        pos = pygame.mouse.get_pos()

        if event.type == pygame.QUIT:
            run = False
            pygame.quit()
            quit()

        if game_state == "menu":

            if event.type == pygame.MOUSEBUTTONDOWN:
                if greenButton.isOver(pos):
                    print("clicked the button")
                    game_state = "game"
                if redButton.isOver(pos):
                    print("clicked the 2button")
                    run = False
            # [...]


        elif game_state == "game":

           # handel main game events
           # [...]

How do you write what you want to happen while game_state is "game" in pygame?

1 Answers1