CODEWITHSUNDEEP
pythonpython-3.xevent-handlingpygame
Egoiistic Prince
Egoiistic Prince

Reputation: 17

How to scroll image with mouse in pygame?

I need to move my paddle image vertically by mouse, how can i do so? Here is my code. I want to move my mouse and associate movement with paddle as in pong game.

import pygame

pygame.init()

width = 900
height = 600
black = (0,0,0)
white = (255, 255, 255)
screen = pygame.display.set_mode((width, height))
pygame.display.set_caption('Pong')
clock = pygame.time.Clock()

paddle1Img = pygame.image.load('paddle.png')
paddle1Img = pygame.transform.scale(paddle1Img,(600, 300))

paddle2Img = pygame.image.load('paddle.png')
paddle2Img = pygame.transform.scale(paddle2Img,(600, 300))
def paddle1(paddle1X, paddle1Y):
    screen.blit(paddle1Img,(paddle1X, paddle1Y))
def paddle2(paddle2X, paddle2Y):
    screen.blit(paddle2Img, (paddle2X, paddle2Y))
def gameloop():
    paddle1X = -90
    paddle1Y = 0
    paddle2X = width - 125
    paddle2Y = 0
    gameOver = False
    while not gameOver:
        for event in pygame.event.get():
            if(event.type == pygame.QUIT):
                gameOver = True
            if(event.type == pygame.MOUSEMOVE):
                # i want to add here something that i cant understand that is how to associate paddleImg with mouse movement
        screen.fill(white)
        paddle1(paddle1X, paddle1Y)
        paddle2(paddle2X, paddle2Y)
        pygame.display.update()
        clock.tick(60)
gameloop()
pygame.quit()
quit()

Upvotes: 1

Views: 1191

Answers (1)

furas
furas

Reputation: 142960

You have event pygame.MOUSEMOTION to get mouse move.
It has mouse positon event.pos which you can use to set paddle position.
Or you can get event.rel to see how much mouse was moved since previous MOUSEMOTION.

I use Surface to generate paddle so everyone can run it without images.

I use Rect to keep positon because it has not only x and y but also center, left, right, top, bottom, etc. so I can check "collision" with border.

import pygame

# --- constants --- (UPPER_NAMES)

WIDTH = 900
HEIGHT = 600

BLACK = (0  ,   0,   0)
WHITE = (255, 255, 255)

# --- classes --- (CamelNames)
# empty
# --- functions --- (lower_names)
# empty

# --- main --- (lower_names)

# - init -

pygame.init()

screen = pygame.display.set_mode((WIDTH, HEIGHT))

# - objects -

paddle1_image = pygame.surface.Surface((100,25))
paddle1_rect = paddle1_image.get_rect(x=90, y=10)

# - mainloop -

clock = pygame.time.Clock()
game_over = False

while not game_over:

    # - events -

    for event in pygame.event.get():
        if event.type == pygame.QUIT:
            game_over = True
        elif event.type == pygame.MOUSEMOTION:
            # move padle with mouse
            mouse_x, mouse_y = event.pos
            paddle1_rect.centerx = mouse_x

    # - updates (detect collision)-

    # keep padle inside window
    if paddle1_rect.left < 0:
        paddle1_rect.left = 0
    elif paddle1_rect.right > WIDTH:
        paddle1_rect.right = WIDTH

    # - draws -

    screen.fill(WHITE)
    screen.blit(paddle1_image, paddle1_rect)
    pygame.display.update()

    # - FPS -

    clock.tick(30) # 30 FPS is enough for human eye to see animation

# - end -   

pygame.quit()

Upvotes: 1

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