Color of text doesn't change

Question

I'm making submarine game in pygame, but text in menu doesn't want to change color when I cover it with mouse. I tried to refresh display at that part, and changing where if sentences are, but nothing seemed to help. There wasn't any syntax errors. Here's the code:

import pygame
pygame.init()
screen = pygame.display.set_mode((600, 500), pygame.FULLSCREEN)
pygame.display.set_caption('Podmornca')
run = True
black = (0,0,0)
red = (255,0,0)
colour1 = black
colour2 = black
colour3 = black
location = pygame.mouse.get_pos()
background = pygame.image.load('meni.png')
clock = pygame.time.Clock()
font = pygame.font.SysFont('bauhaus93', 20)
text1 = font.render('SINGLE PLAYER', 1, barva1)
text2 = font.render('MULTIPLAYER', 1, barva2)
text3 = font.render('QUIT', 1, barva3)
pygame.display.update()
def grafika():
    clock.tick(60)
    screen.blit(background, (0,0))
    screen.blit(text1, (100, 200))
    screen.blit(text2, (100, 250))
    screen.blit(text3, (100, 300))
    pygame.display.update()     
while run:
    for event in pygame.event.get():
        if event.type == pygame.QUIT:
            run = False
    if location == (100, 200):
        colour1 = red
    if polozaj == (100, 250):
        colour2 = red
    if location == (100, 300):
        colour3 = red
    grafika()
pygame.quit()

Can anyone tell me, where I messed up and how to fix it?

(I am assuming that *colourX* and *barvaX* are supposed to be the same thing, just incompletely translated to English.) The problem appears to be that you only rendered your text items *once*, prior to the main loop; these items aren't going to magically change just because you changed a variable that was used in their original creation. — jasonharper, Apr 29 '20 at 14:47
You have a similar problem with `location`: you only set it once, it's not going to magically update itself as the mouse moves. It's extremely unlikely that the mouse position is ever going to be *exactly* equal to `(100, 200)` or the other two coordinates you're checking for: you need to check the position being within a rectangular area instead. — jasonharper, Apr 29 '20 at 14:53

score 1 · Accepted Answer · answered Apr 29 '20 at 14:59

You have to get the mouse position in the main application loop.

Render the each text twice, once in black and once in red:

text1 = font.render('SINGLE PLAYER', 1, black)
text2 = font.render('MULTIPLAYER', 1, black)
text3 = font.render('QUIT', 1, black)
text1red = font.render('SINGLE PLAYER', 1, red)
text2red = font.render('MULTIPLAYER', 1, red)
text3red = font.render('QUIT', 1, red)

Use pygame.Rect and collidepoint() to detect the if the mouse is on the text. Draw the red text if the mouse is on the text and draw the blcok text else. For instance:

def drawText(text, textRed, pos):
    location = pygame.mouse.get_pos()
    if text.get_rect(topleft = pos).collidepoint(location):
        screen.blit(textRed, pos)
    else:
        screen.blit(text, pos)

See the example:

import pygame

pygame.init()
screen = pygame.display.set_mode((600, 500))
pygame.display.set_caption('Podmornca')
run = True
black = (0,0,0)
red = (255,0,0)
background = pygame.image.load('meni.png')
clock = pygame.time.Clock()
font = pygame.font.SysFont('bauhaus93', 20)

text1 = font.render('SINGLE PLAYER', 1, black)
text2 = font.render('MULTIPLAYER', 1, black)
text3 = font.render('QUIT', 1, black)
text1red = font.render('SINGLE PLAYER', 1, red)
text2red = font.render('MULTIPLAYER', 1, red)
text3red = font.render('QUIT', 1, red)

def drawText(text, textRed, pos):
    location = pygame.mouse.get_pos()
    if text.get_rect(topleft = pos).collidepoint(location):
        screen.blit(textRed, pos)
    else:
        screen.blit(text, pos)

def grafika():
    clock.tick(60)
    screen.blit(background, (0,0))
    drawText(text1, text1red, (100, 200))
    drawText(text2, text2red, (100, 250))
    drawText(text3, text3red, (100, 300))
    pygame.display.update()     

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

Color of text doesn't change

1 Answers1

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