Is it planned to make a tixati with qt interface?

Yes, at some point.

We're planning on a major overhaul of the GUI widgets in the near future, at which time I would like to add GTK3 and QT widgets.

I can't say for certain how long this will take, it is a big big job, and there are a few other things that need attention first.  But it is definitely on the agenda, as it would be nice to see the native widgets on KDE.