Samuel Cormier-Iijima skrev:
Hi John,
Thanks for the reply :-) I've gotten it to work with these virtual
functions, however the python code is ugly with the required call to
gobject.type_register and using signals for the vfuncs (you have to
subclass and implement the method do_on_connected and define
__gsignals__ instead of just implementing on_connected). I'm not sure
how hard this would be to implement, are there plans under way to
allow for things like this?
Signal overrides are different from virtual methods.
The support for overriding virtual methods is relatively new in PyGTK,
It was introduced
in 2.6 unless I'm mistaken.
You'll only need to define __gsignals__ if you want to override a
signal, it is not necessary to implement a virtual method. However, you
should always call gobject.type_register for the subclass even though
it's not always necessary, it's of good practice.
In other words, to override say expose event, do this:
class MyWidget(gtk.Widget):
def do_expose_event(self, event):
pass
gobject.type_register(MyWidget)
For a complete example of a custom widget check out the
examples/gtk/widget.py file in pygtk cvs/tarball.
Johan
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