macOS menus have white corners on dark background under gtk+ scheme

[Gonzalo Garramuno]

I opened issue #435 on GitHub with an example program, which I reproduce here as it is small. Compile with fltk-config.

#include <FL/Fl.H>
#include <FL/Enumerations.H>
#include <FL/Fl_Double_Window.H>
#include <FL/Fl_Menu_Button.H>

void empty_cb( Fl_Widget* w, void* )
{
}

int main(int argc, char** argv)
{
Fl::scheme( "gtk+" ); // base is fine, plastic is also wrong
Fl::set_color( FL_BACKGROUND_COLOR, 64, 64, 64 );

Fl_Double_Window *window = new Fl_Double_Window(400,400,"Use RMB for menu");
Fl_Menu_Button* m = new Fl_Menu_Button(0,0,400,400);
m->type( Fl_Menu_Button::POPUP3 );

m->add( "See/White corners in menus", 0, (Fl_Callback*)empty_cb, NULL );

window->end();
window->show();

return Fl::run();
}


—
Gonzalo Garramuno
ggar...@gmail.com

[Gonzalo Garramuno]

> El 23 abr. 2022, a las 17:10, Gonzalo Garramuno <ggar...@gmail.com> escribió:
>
> I opened issue #435 on GitHub with an example program, which I reproduce here as it is small. Compile with fltk-config.

I created three patches that fix the issues for plastic, gtk+ and gleam. They are in GitHub issue #435. Please someone be kind to merge them.

—
Gonzalo Garramuno
ggar...@gmail.com

[melcher....@googlemail.com]

Yes, that is a known bug. Rounded boxes rely on the parent widget to draw the background which is not the case for a popup menu. I'll try to look at the fixes, time permitting.

[Gonzalo Garramuño]

El 26/4/22 a las 07:49, 'melcher....@googlemail.com' via fltk.coredev
escribió:

> Yes, that is a known bug. Rounded boxes rely on the parent widget to
> draw the background which is not the case for a popup menu. I'll try
> to look at the fixes, time permitting.
>

The problem shows up on normal menus, too, not just popups.  The fix I
made is drawing 4 lines in a rectangle with a FL_BLACK mixed with the
color of the menu to cover the 2 pixel corners.  It seems to work fine,
but feel free to improve the fixes if you wish.

--
Gonzalo Garramuño
ggar...@gmail.com

[Bill Spitzak]

I would just use square boxes for windows.

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[Gonzalo Garramuño]

El 12/6/22 a las 19:33, Bill Spitzak escribió:

> I would just use square boxes for windows.

The windows are square.  But with the different schemes, they use the
rounded edges of the schemes (which makes them look nice, except on the
corners where they leave some unpainted pixels).

--
Gonzalo Garramuño
ggar...@gmail.com