[Interest] QPainter drawLine zValue?

Israel Brewster ijbrewster at alaska.edu
Wed Sep 25 21:06:46 CEST 2019

On Sep 25, 2019, at 10:55 AM, Giuseppe D'Angelo via Interest <interest at qt-project.org> wrote:
> Il 25/09/19 19:13, Israel Brewster ha scritto:
>> Is there a way to set the Z value of the line drawn by the QPainter::DrawLine() function? I have a library that uses the drawLine function to create a grid, and I would like to keep the grid on the top as I draw other things, if possible. Thanks.
> Can you draw the grid _last_?
> There's no Z value (or Z buffer altogether) for QPainter. A new drawX command draws directly to the target, honouring the composition mode for blending source and destination together.

Worth looking into. The drawing is actually being done by a third-party library (PyQtGraph), which makes it harder, but I’ve hacked it before to get it to do what I want, so I may be able to do the same here. I’ll have to dig into how it draws the various components. Thanks!

Israel Brewster
Software Engineer
Alaska Volcano Observatory 
Geophysical Institute - UAF 
2156 Koyukuk Drive 
Fairbanks AK 99775-7320
Work: 907-474-5172
cell:  907-328-9145

> HTH,
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> Giuseppe D'Angelo | giuseppe.dangelo at kdab.com | Senior Software Engineer
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