Hi Toni,
I think that you can plot the triangle mesh with the routine CRVTRI after the option SURMSH ('ONLY')
and then plot the filled contours with the routine CONTRI above the mesh.
No, there is no compatibility between the Dislin widget routines and Qt. The Dislin widgets are based
on OpenMotif for X11 systems and on GDI for Windows, but it's possible to send the graphical output
of Dislin to an external window. You can take a look at the Dislin routine SETXID.
With best regards,
Helmut