What is the easiest GUI toolkit for C programming? I've written a large amount of code for Linux that I need to add a GUI.
I looked downloaded GTK but it looks like a steep learning curve. I've heard about QT but their website indicate liscensing fees. wxWidgets looks simple with good tutorials but apparently is for C++ which would be another learning curve.
I'm serious about learning one of these but I can already see it will be a large investment of time. So which way should I go?
