Request SurfacePainter.textbox function to support system fonts

[RonTang]

Hi, I found SurfacePainter.textbox(screen.draw.textbox) function in screen.py doesn't support to use sysfontname.
I think modify drawbox function in ptext.py and getfont funtion in loaders.py could add support for sysfont. But it is difficult for me to pull a stable and compatible request to add this feature. Please consider adding that this function supports the use of system fonts. Thanks.

[lordmauve]

Please can you give an example of what you tried and what didn't work?

[RonTang]

Thank you for your reply.My English is not very good I hope you could understand what I say.
I use this code to set font of textbox:
screen.draw.textbox(text,text_box,color ="green", sysfontname="fangsong")
but pygame zero doesn't use correct font to draw.
At first I thought it was my system font problem ,so I test many other system font name in my system. None of them is correct.
At last I found inner drawbox function in the ptext.py doesn't use sysfontname parameter... And our font loader doesn't load system font too.

[RonTang]

I want to use pygame zero to render Chinese. Adding the Chinese font ttf file in the fonts folder can solve it, but the Chinese font file is relatively large, so it is very good to be able to use system fonts. So I added this feature in my own branch. The changes are relatively small and involve two files.
https://github.com/RonTang/pgzero/commit/b02d6139d107cccc10af03d03fead6fc8f271726
@lordmauve Is this OK? if you confirm it, I could pull request the code.Thanks a lot.

[lordmauve]

Sounds good, yes, please.