I have had a look at this. There are no scroll events being generated by GTK when the shift button is held down. This is either a bug in GTK or possibly OSX is stealing these events when shift is held. I'll try to find out if this is a gtk problem.
I have had a look at this. There are no scroll events being
generated by GTK when the shift button is held down. This
is either a bug in GTK or possibly OSX is stealing these
events when shift is held. I'll try to find out if this is
a gtk problem.