What widgets in TES Construction Set?

[Juhana Sadeharju <kouhia nic funet fi>]

Hello. What GUI items can be seen in these images:
http://www.funet.fi/~kouhia/tescs-objectwindow.png
http://www.funet.fi/~kouhia/tescs-lightwindow.png
http://www.funet.fi/~kouhia/tescs-regionwindow.png

They are from TES Construction Set which is used to modify
the Oblivion game. Note that user may grab and move the
vertical lines in the label row of the spreadsheet, for
revealing or hiding the text.

I tried Glade but soon found that plain GTK is more for my
taste. In Glade, good is that all the widget properties are
listed, no guess work. Bad was that I could not do what
I wanted.

My application includes OpenGL/GPU graphics. Is the gtkglext
preferred choice? Is everything possible with it? I have
no idea how 2D graphics and 3D GPU-graphics are mixed in
gnome/gtk/gtkglext.

Juhana