python - Pygame Button with rounded Corners, border_radius argument does not work

Question

I am currently learning pygame. When programming rectangles with rounded corners I encountered a problem.

pygame.draw.rect() draw a rectangle rect(surface, color, rect) -> Rect rect(surface, color, rect, width=0, border_radius=0, border_radius=-1, border_top_left_radius=-1, border_top_right_radius=-1, border_bottom_left_radius=-1) -> Rect Draws a rectangle on the given surface.

border_radius (int) -- (optional) used for drawing rectangle with rounded corners. The supported range is [0, min(height, width) / 2], with 0 representing a rectangle without rounded corners.

This is the description of the official pygame documentation.

username_rect = pg.rect.Rect(screenwidth/2 - 1/8*screenwidth, screenheight*1/5, 1/4*screenwidth, username_title_render.get_height() + 10)
pg.draw.rect(screen, (0,0,0), username_rect,border_radius = 15)

Here the main part. But then I get this error message:

TypeError: 'border_radius' is an invalid keyword argument for this function

I already tried to add a "width=2" argument but then it says that there are too many arguments. Unfortunately taking other numbers does not help either. I am currently using pygame version 2.0.0.dev6 (SDL 2.0.10, python 3.8.1)

I would be very happy if you could help me, thanks a lot in advance!

Answer 1

The documentation is for 2.0.0.dev7, and according to this PR, border_radius was added after 2.0.0.dev6, GitHub reference, was released. So you're trying to use something that hasn't come out yet. You could try building from source and using the keyword (though stability is not a promise). Or you could try using a combination of rectangles and circles to achieve the effect.