How to get screen to clear?

[mzmingle]

Hi, I'm confused again! I'm trying to code it so that when they click a button, it moves to a new screen. However, at the moment, it only goes to the cleared screen as long as i keep hold of the mouse button - how do I get it to stay after it's been clicked?

I know this is probably really obvious, but it won't work for me haha!

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if event.type == pygame.MOUSEBUTTONDOWN:     mouse = pygame.mouse.get_pos()     if student.collidepoint(mouse):         screen.fill(WHITE)

[metulburr]

You have to set a flag and fill the screen every frame. Currently you are only filling the screen on the frame that a mouse button is down and the mouse is in collision with your student rect.

Here is an example that when you press a mouse button it switches to and from white.

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import pygame as pg   pg.init() screen = pg.display.set_mode((800,600)) running = True bg_white = False     while running:     for event in pg.event.get():         if event.type == pg.QUIT:             running = False         elif event.type == pg.MOUSEBUTTONDOWN:             bg_white = not bg_white                   if bg_white:         screen.fill((255,255,255))     else:         screen.fill((0,0,0))     pg.display.update()

[mzmingle]

The issue is I created a button, which should open a new screen when it is pressed. How can I get this to work without using .collidepoint (since this only seems to imply it will work when I am keeping hold of the mouse)?

UPDATE: I got it to work - I put the new if true part in the mouse button down bit rather than just in while running.

[metulburr]

The issue is I created a button, which should open a new screen when it is pressed

when you say open a screen it makes me think that you are really doing something more complicated called states. Which is a whole other level of complexity.

How can I get this to work without using .collidepoint (since this only seems to imply it will work when I am keeping hold of the mouse)?

collidepoint will work. You just have to set a flag after it to draw the screen, not draw the screen itself after the collision.

[mzmingle]

It works - sorry, I just made an error with the indents haha, thank you!

[metulburr]

here is a more full fledged example

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import pygame as pg   pg.init()   def flip_color():     global bg_white     bg_white = not bg_white   class Button:     def __init__(self, rect, command):         self.color = (255,0,0)         self.rect = pg.Rect(rect)         self.image = pg.Surface(self.rect.size)         self.image.fill(self.color)         self.command = command     def render(self, screen):         screen.blit(self.image, self.rect)     def get_event(self, event):         if event.type == pg.MOUSEBUTTONDOWN and event.button == 1:             if self.rect.collidepoint(pg.mouse.get_pos()):                 self.command()                   screen = pg.display.set_mode((800,600)) screen_rect = screen.get_rect() running = True bg_white = False   btn = Button((10,10,105,25), flip_color)   while running:     for event in pg.event.get():         if event.type == pg.QUIT:             running = False         btn.get_event(event)     if bg_white:         screen.fill((255,255,255))     else:         screen.fill((0,0,0))     btn.render(screen)     pg.display.update()