Previously one could set the icon field of a tree model to None, but
with Gtk3 and older versions of pygobject3 this would fail.
Use can_set_row_none to test for this condition and work around it.
The previous traceback was:
Traceback (most recent call last):
File "/home/rjones/d/virt-manager/virtManager/manager.py", line 981, in vm_inspection_changed
self.get_inspection_icon_pixbuf(vm, 16, 16)
File "/usr/lib64/python2.7/site-packages/gi/overrides/Gtk.py", line 1152, in __setitem__
self.model.set_value(self.iter, key, value)
File "/usr/lib64/python2.7/site-packages/gi/overrides/Gtk.py", line 1298, in set_value
Gtk.TreeStore.set_value(self, treeiter, column, value)
File "/usr/lib64/python2.7/site-packages/gi/types.py", line 47, in function
return info.invoke(*args, **kwargs)
TypeError: Argument 3 does not allow None as a value
This unfortunately has a decent amount of fallout: add a wrapper class
in config.py that reduces much of the churn.
Another big piece is that gsettings can't accept arbitrary paths like
gconf would, everything needs to be described in the schema.
Also do a bunch more RPM spec modernizing
Despite being a known quantity, autotools is so overkill for our needs,
so let's drop it and replace it with a much simpler and easy to customize
system.
Leonardo Garcia