----- Original Message ----
> From: Marc Dirix <m...@electronics-design.nl>
> To: Lance Dillon <riffraff...@yahoo.com>
> Sent: Fri, September 10, 2010 4:25:37 PM
> Subject: Re: glade signals with user data
>
> Thank you for your answer.
>
> I think you miss the point here.
>
> The glade, interface designer, has an option "User Data" which should be
> send along with the signal to the signal handler function. This is
> defined in the glade xml file as "object=" in the signal directive.
>
> If I now create two different buttons with the same signal handler, but
> different "User Data" I can differentiate between the two buttons.
>
I see what you are talking about here. That is something different. That is
for when you build a c, c++, or ada project by going to Project->Build. It
outputs a bunch of files. In the src directory there is a file called
interface.c that has the code for connecting the signal. If you look in
interface.c, you will see this in there somewhere:
g_signal_connect_swapped ((gpointer) Home, "clicked",
G_CALLBACK (Change_Location),
GTK_OBJECT (Home));
That is the callback. That is something completely different from
signal_autoconnect(). That is a pike function that calls
glade_xml_signal_autoconnect_full(GLADE_XML(THIS->obj),pgtk2__signal_connect,&args);
which itself ends up calling pgtk2__signal_connect (in
GTK2/source/gladexml.pre), which itself calls g_signal-connect_data with the
pgtk2_signal_func_wrapper (standard pike/GTK2 signal function) with the pike
callback and the args (the passed in object from signal_autoconnect()).
Since the code is a little different, what I would do would be to create a
mapping with a bunch of data to be used by multiple callbacks. Then you can
say
match the object with a key in the mapping for data to pass to the signal.
I should add set_data() and get_data() to gobject (in the inheritance tree of
all the widgets) so we could attach arbitrary data to gtk2 objects. It could
be
used to get around this problem.
For other people who may or may not be paying attention to this thread, what do
you think about adding the gobject set_data/get_data functions?
http://library.gnome.org/devel/gobject/stable/gobject-The-Base-Object-Type.html#g-object-get-data
