#387 Incompatybility with Qt 6.8

[DavidXanatos]

When using with Qt 6.8 the QwtLegend does not show the color anymore, and QwtPlotGrid always shows a black grid no mater what color I try to set.
On substantially older Qt6 versions it seams to still be working and in Qt5 its fine.
I would appreciate a compatibility update to the latest Qt very much.

[Uwe Rathmann]

I can't see this problem on my system ( Linux/X11 ) with the code from https://sourceforge.net/p/qwt/git/ci/qwt-6.3/tree/. Does it happen in your environment with the bode example ?

[DavidXanatos]

In that example the legend example/color box is missing only the text is rendered on my platform Windows 11 24h2 Qt 6.8.3 with an older Qt 6.5.1 it works ok

[Uwe Rathmann]

https://sourceforge.net/p/qwt/bugs/374/
https://sourceforge.net/p/qwt/bugs/381/

Are you sure that your are using the correct Qwt version ?

[DavidXanatos]

well I am using Qt 6.8.3 and I cant just go back to using some outdated Qt because of a bug in Qwt

[Uwe Rathmann]

Nobody suggested that: the other bug reports indicate, that the problem has been fixed in Qwt 6.3.0. And for the record: AFAIR it was about an incompatibility between Qt versions - nothing I could have known in advance when releasing Qwt 6.2.x.

So again: are you sure that you are running Qwt 6.3 ?

[DavidXanatos]

Ah I see... unfortunately Qwt and Qt is easy to mix up... I thought you were asking about the used Qt version, my bad.

I checked and it seams I had the 6.2 QWT version, i thought i had the last version... I updated now to 6.3 QWT and the issue is resolved.

Thanks