Looking for new customised GUI

[Tim Edwards <tim fxhome com>]

Hello,

I work for a small British firm making post-production film special 
effects software. We are looking into a new user inferface to add to our 
software, which can be totally customised, and capable of running on 
both Windows and Macintosh machines. Upon browsing the Internet, and 
speaking to colleagues GTK+ has become very interesting to look into.

We would like to ask if GTK+ would be capable of producing a GUI for a 
video effects application, something similar to Adobe After Effects.

Things of interest with us would include customised look which would 
mirror on both platforms. Creating our own widgets for use with color 
wheels, histograms and dialog boxes; vector drawing, flow charts and 
interactive movie timeline, to name but a few.

Would GTK+ be capable of all this? Or if not would to be possible using 
another means?

Thank you,

Tim Edwards
FXhome.com