Window rounding

[Janrupf]

Currently, setting style->window.rounding does not seem to have any effect, and I also couldn't find any use of this variable in the source code. Am I missing something here is or is window rounding not implemented?

[riri]

Did you try

nk_style_push_float(ctx, &ctx->style.window.rounding, window_rounding_flow_value);

[Janrupf]

I basicially did context->style.window.rounding = 50f

[riri]

Actually you are right, the panel creation does not use the rounding setting, but in any case, I think changing style setting implies using nk_style_push_***() functions so that changed are stacked.
The result will also depends on the backend, if rounded rectangles are possible or not (no problem with opengl* at least).

[Janrupf]

Might make a PR for that then, sounds like someone put it there and then forgot about it.

(Yeah, I'm using OpenGL through Java, ported from the C backend, rounding works fine for buttons)

[riri]

I had a look in the panel code to find out if it was applied. Then I realized it's not as simple as it seems because of clipping I guess. The way a window is drawn might need to change because of the presence of the header (for now, the window "content" is drawn below the header, so that rounding would not work as expected). I leave that to nuklear expert ;-)

[Janrupf]

I think rounding the content would be fine. I also looked at the panel code, but currently I don't think there is a way to just round one corner of a rectangle, so I totally agree that rounding would look weird. It would be cool to still have rounding for just the content nevertheless, I actually don't need the titlebar and border for the rounded window

[riri]

The problem is that the PR would need to handle the header.
For your exact case, I suppose using the rounding style at nuklear_panel.c(297) would be enough:

        else nk_fill_rect(out, body, style->window.rounding, style->window.fixed_background.data.color);