Akos Maroy wrote:
Hi,
I'm trying to create a custom implementation of Gtk::Notebook, and I'm
having great difficulties.
for one, I wanted to catch the event of a new page added to the
Notebook object. but there's no such event handler. so I considered
overriding all the zillion prepend_page(), insert_page(), etc.
functions. but none of them are declared as virtual, so there's no use
in doing so.
as a workaround, I added a function that would create my own
representation of the pages, that could be called explicitly. that
seemed to be OK, but no matter what I do, the widget is rendered as the
stock Gtk::Notebook widget. even if I override the on_realize(),
on_expose_event(), on_map(), etc. functions. what is even more
interesting, is that if I override all these, and call explicitly
Gtk::Container::on_realize(), etc. from them, rendering is still done
as the stock Gtk::Notebook does.
this seems very weird to me, and goes contrary to my C++ knowledge. how
come that Gtk::Notebook::on_realize() can be called, if I explicitly
call Gtk::Container::on_realize() myself?
or is it so, that Gtk::Container::on_realize() and the like check what
kind of object this is, and execute code accordingly? well, that it's
quite contrary to generic object inheritance logic...
Akos
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Hey Akos,
I have never tried to customize the containers that the notebook class
uses to display its pages, so I am not sure that this will even be
relevant: When you override the various virtual functions like
"on_realize" what boolean value are you returning? If I understand the
documentation properly, you should return false if you
have not handled the event and want the standard
ancestor class implementation to be called or your version of the
function should return true if it has handled the event
and you do not want the ancestor class implementation to be
called.
If you are already doing this, please forgive my suggestion.
--
Robert
L Caryl Jr
Fiscal
Systems, Inc.
256-772-8920 Ext. 108
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