[Glade-devel] Extending libglade with new widgets

[tristan.van.berkom at gmail.com (Tristan Van Berkom)]

Jeff Westerinen wrote:

> I am trying to learn how to add widgets to Glade and libglade.  I
> followed the GTK+ 2.0 Tutorial and created the tictactoe widget.  I then
> created a widget catalog and installed it, and I'm able to use Glade3 to
> create correct XML that describes a window with a tictactoe widget.
> But, now, I don't understand what I must do to get libglade to recognize
> the widget.  The libglade documentation says you may or may not need a
> "plugin" lib for the widget.  But it also suggests that the actual
> widget code itself can be used by libglade.  One way or another, it
> appears that whatever library is used must have a
> "glade_module_register_widgets()" function.  Does anyone know how this
> all works or can anyone point me to some kind of documentation that
> describes this better?
>  
glade_xml_register_widget() must be called on any GType that is
to be built by libglade.

When you create a module in glade-3, the symbolic name is currently
used as a dependancy (notice the <requires> tag in the glade file),
this will trigger libglade to load the coresponding libglade module.

in this libglade module you must call glade_xml_register_widget() and
optionally pass in custom constructors... of you have custom parameters
on your objects (i.e. not installed with g_object_class_install_property()),
then you must call glade_xml_register_custom_prop() for these.

See $(gnomecvs)/libglade/glade/glade-gtk.c for example code.

Cheers,
                                          -Tristan

Note, its been a while since I looked at the libglade module stuff; I'm
sure if you grep around a little you'll find the appropriate install 
prefix and
naming scheme for your libglade module :)