On Mon, 2010-05-10 at 17:37 -0400, José Alburquerque wrote: > On Mon, 2010-05-10 at 20:50 +0000, Piscium wrote: > > And what are the advantages of each way of connecting signals? > > > > It seems to me that overriding a signal method requires less typing, and > > results perhaps in more readable code. > > > > On the other hand, the method on_expose_event used in DrawingArea is > > protected, so one can override it only if one derives from DrawingArea, > > which may not be always expedient. > > > > Are there any other advantages and disadvantages? > > > > And are there any subtle semantic differences between the two ways? I would > > assume that overriding the signal method somehow causes the signal to be > > connected behind the scenes, though I have no clue how that would be done. > > > > One difference from connecting versus deriving is that with connecting, > it is possible to use connect_notify() instead of connect() which allows > controlling whether the handler will be called before or after the > default signal handler: > > http://library.gnome.org/devel/glibmm/unstable/classGlib_1_1SignalProxy1.html#a1dd40d7c3475124bb78053805fbde3f8
I should have added that the online book has a good section on this: http://library.gnome.org/devel/gtkmm-tutorial/unstable/chapter-signals.html.en -- José _______________________________________________ gtkmm-list mailing list gtkmm-list@gnome.org http://mail.gnome.org/mailman/listinfo/gtkmm-list
