Detect if mouse has left Pygame window

Question

I'm writing a small Pygame script and I need to know if the mouse has left the Pygame window

I don't know how else to explain it. It seems simple, but I can't find a solution anywhere.

Answer 1

pygame.mouse.focus() gives 0 when mouse leaves window (at least in Linux)

#!/usr/bin/env python3

import pygame

pygame.init()
screen = pygame.display.set_mode((800,600))

is_running = True
while is_running:

    for event in pygame.event.get():
        if event.type == pygame.QUIT:
            is_running = False
        elif event.type == pygame.KEYDOWN:
            if event.key == pygame.K_ESCAPE:
                is_running = False

    print(pygame.mouse.get_focused())

pygame.quit()

Answer 2

I don't understand why there is no one tell you to use ACTIVEEVENT.

I don't know in older pygame version, but in windows 10, python 3.7.3, pygame 1.9.6, I can use this:

import pygame as pg
video = pg.display.set_mode((300,300))

running = True

while running:
    for event in pg.event.get():
        if (event.type == pg.ACTIVEEVENT):
            if (event.gain == 1):  # mouse enter the window
                print("Welcome, cursor! :D   ",
                      "Selamat datang, kursor! :D")
            else:  # mouse leave the window
                print("Good bye, cursor! :(  ",
                      "Sampai jumpa, kursor! :(")
        elif (event.type == pg.QUIT):
            running = False
            pg.display.quit()
            print("Bye! Have a nice day! ",
                  "Sampai jumpa! Semoga harimu menyenangkan! :)")

I've tested it. It works!