Pygame window displays blank black screen

Question

Here is my code, please keep in mind that I picked up python a couple of days ago so my code may be incorrectly made, ect. I am trying to make a window that will display some text (beta) and will display two small rectangles that I want to make into buttons.

import sys
import pygame
from pygame.locals import *
pygame.init()

size = width, height = 720, 480
speed = [2, 2]
black = (0,0,0)
blue = (0,0,255)
green = (0,255,0)
red = (255,0,0)

screen = pygame.display.set_mode(size)
screen.fill((blue))

pygame.display.set_caption("BETA::00.0.1")

clock = pygame.time.Clock()

def game_intro():

  intro = True

  while intro:
     for event in pygame.event.get():
         print(event)
         if event.type == pygame.QUIT:
             pygame.quit()
             quit()

    gameDisplay.fill(blue)
    largeText = pygame.font.Font('freesansbold.ttf',115)
    TextSurf, TextRect = text_objects("BETA", largeText)
    TextRect.center = ((display_width/2),(display_height/2))
    gameDisplay.blit(TextSurf, TextRect)

    pygame.draw.rect(gameDisplay, green,(150,450,100,50))
    pygame.draw.rect(gameDisplay, red,(550,450,100,50))

    pygame.display.flip(screen)
    pygame.display.update(screen)
    clock.tick(15)

Andrea Dusza Andrea Dusza · Accepted Answer · 2015-12-24T00:41:20

Problems:

Indentation error
Your game_intro() function is defined, but never called
You wrote gameDisplay instead of screen 4 times, also display_width, display_height instead of width, height
In game_intro(), code after your infinite loop is never called
pygame.display.update(screen) does not work, it should be pygame.display.update() to update the whole screen. flip(screen) also needs to be changed to flip()
The function text_objects() is not defined but I found the definition in the example you probably copied the code from :)

Corrected code:

import sys
import pygame
from pygame.locals import *
pygame.init()

size = width, height = 720, 480
speed = [2, 2]
black = (0,0,0)
blue = (0,0,255)
green = (0,255,0)
red = (255,0,0)

screen = pygame.display.set_mode(size)

pygame.display.set_caption("BETA::00.0.1")

clock = pygame.time.Clock()


def text_objects(text, font):
    textSurface = font.render(text, True, black)
    return textSurface, textSurface.get_rect()

def game_intro():

  screen.fill(blue)

  largeText = pygame.font.Font('freesansbold.ttf',115)
  TextSurf, TextRect = text_objects("BETA", largeText)
  TextRect.center = ((width/2),(height/2))
  screen.blit(TextSurf, TextRect)

  pygame.draw.rect(screen, green,(150,450,100,50))
  pygame.draw.rect(screen, red,(550,450,100,50))

  pygame.display.flip()
  pygame.display.update()
  clock.tick(15)

  intro = True

  while intro:
     for event in pygame.event.get():
         print(event)
         if event.type == pygame.QUIT:
             pygame.quit()
             quit()


game_intro()

Pygame window displays blank black screen

1 Answers