TOPIC:

I compiled the ide platform to use the qt5 then qt4 widgets, all is fine aside from the fact i cannot see the form or components in the designer window.

If I place components on the form blindly and compile/run the resulting program executes correctly.

Any idea on how to fix

Sir
QT5 is under development
please build and use CT for QT4 or for GTK2 on Kubuntu 15.04

I am having the same problem when building with QT4, with GTK2 all is fine

Sir, my suggestion
If possible to change Distribution,
we have tested CT 5.30 on Ubuntu 15.04, Ubuntu Mate 15.04 and Debian 8 (with all desktops Mate, KDE, etc) without problems.

We will start tests and on Kubuntu 15.04, from Monday morning

ok thank you