Lesson #4: Mouse and Touchscreen Control (taught by middle school student)

Middle school student, age 13, teaches you how to get mouse control working on the moving square.

• Goes through event queue to check for the mouse button. event.type == MOUSEBUTTONDOWN:
• Checks for point collision with a rectangle: collidepoint(mouse_pos)

import pygame, sys ## Statement that allows users to acess pygame specific commands from pygame.locals import * pygame.init() FPS = 30 clock = pygame.time.Clock() size = (480, 320) screen = pygame.display.set_mode(size) # define color using Red, Green, Blue values # 0 is blank # 255 is maximum RED = (255, 0, 0) # all red. no other color BLACK = (0, 0, 0) ## set colors for the up/down rectangle GREEN = (0, 255, 0) BLUE = (0, 0, 255) # left edge of rectangle, top, width height player_rect = pygame.Rect(0, 0, 64, 64) ## Create rectangles that will detect direction up_rect = pygame.Rect(300, 100, 50, 50) down_rect = pygame.Rect(300, 180, 50, 50) direction = "down" while True: for event in pygame.event.get(): if event.type == pygame.QUIT: pygame.quit() sys.exit() ## Check to see if the mousebutton is pressed if event.type == MOUSEBUTTONDOWN: mouse_pos = pygame.mouse.get_pos() ## Check if the mouse_pos is within the rectangle if up_rect.collidepoint(mouse_pos): direction = "up" if down_rect.collidepoint(mouse_pos): direction = "down" screen.fill(BLACK) pygame.draw.rect(screen, RED, player_rect) ## draw the rectangles that will detect direction pygame.draw.rect(screen, GREEN, up_rect) pygame.draw.rect(screen, BLUE, down_rect) if direction == "down": player_rect.centery += 5 elif direction == "up": player_rect.centery -= 5 if player_rect.bottom > size[1]: direction = "up" if player_rect.top < 0: direction = "down" clock.tick(FPS) pygame.display.update()