python-examples: c9e27a5a20ee5f3b1c8f1cfb362b33b023e3df64

     1: # Mouse-paintable window in 10, 11 and 12 lines
     2: 
     3: import pygame, sys, time
     4: # Start the pygame system
     5: pygame.init()
     6: 
     7: # This will be our canvas
     8: screen = pygame.display.set_mode((800, 600))
     9: 
    10: while True:
    11: 	# Go through pygame's list of accumulated events since the last check
    12: 	for event in pygame.event.get():
    13: 		if event.type == pygame.QUIT:		# NOT NEEDED (but makes the close button work)
    14: 			sys.exit()						# NOT NEEDED (but makes the close button work)
    15: 		pass								# NOT NEEDED (if the above two lines are used)
    16: 	# See if the left mouse button is held down
    17: 	if pygame.mouse.get_pressed()[0]:
    18: 		# Draw a 2 pixel wide white line from the last known position to the current position
    19: 		pygame.draw.line(screen, (255, 255, 255), old_position, pygame.mouse.get_pos(), 2)
    20: 		# Update the window contents
    21: 		pygame.display.update()
    22: 	# Remember the last mouse position
    23: 	old_position = pygame.mouse.get_pos()
    24: 
    25: 	time.sleep(0.1)						# NOT NEEDED (but stops the CPU getting overworked)
    26: