Hi Frederico,
(Copied from my own post from Mar 23, 2006 12:31:00 pm)
Here are four additional possibilities:
1. Use global variables for your widgets.
2. Create a struct containing pointers to all your widgets and use the
userdata field to pass this struct around in all callbacks.
3. Use the g_object_set_data() method to attach miscellaneous pointers to
your widgets. I.e. in the widget construction do:
GtkWidget *w_tree_view, *w_button; w_tree_view = gtk_tree_view_new(...); :
w_button = gtk_button_new(); g_object_set_data(G_OBJECT(w_button),
"tree_view", w_tree_view); g_signal_connect(G_OBJECT(w_button), "clicked",
G_CALLBACK(cb_button_clicked), NULL);
and in the callback cb_button_clicked() do:
GtkWidget *w_tree_view = GTK_WIDGET(g_object_get_data(G_OBJECT(widget),
"tree_view"));
This method is similar to what glade is doing.
4. Create your own container widget, e.g. by gob2 or vala and put all your
widgets in it. This is a fancy way of doing the struct callback I mentioned
above.
Hope this helps.
Regards,
Dov
2009/3/11 Tadej Borovšak <tadeb...@gmail.com>
> 2009/3/11 frederico schardong <frede....@gmail.com>:
> >>void my_callback_function (GtkButton *widget, gpointer user_ptr);
> >>
> >>...
> >>
> >>g_signal_connect( G_OBJECT( widget), "clicked",
> >> G_CALLBACK( my_callback_function), user_ptr );
> >>
> >>
> >>void my_callback_function (GtkButton *widget, gpointer user_ptr) {
> >>
> >> ...
> >>}
> >>
> >>
> >>http://library.gnome.org/devel/gtk/unstable/GtkButton.html
> >
> > but how I can pass to my_callback_function the gtk_drawing_area? I
> > know about the g_signal_connect.. but I not know how pass another
> > widget, without the widget being passed the first parameter of
> > function..
> > _______________________________________________
> > gtk-app-devel-list mailing list
> > gtk-app-devel-list@gnome.org
> > http://mail.gnome.org/mailman/listinfo/gtk-app-devel-list
> >
>
> Hello.
>
> Just pass your drawing area as a last parameter to g_signal_connect
> function.
>
> Simple code would look like:
>
> ---------- CODE -----------
> int
> main( int argc, char **argv )
> {
> GtkWidget *button = gtk_button_new();
> GtkWidget *draw = gtk_drawing_area_new();
>
> g_signal_connect( G_OBJECT( button ), "clicked",
> G_CALLBACK( cb_clicked ), draw );
>
> /* More code here */
> }
>
>
> /* Callback function */
> static void
> cb_clicked( GtkButton *button,
> GtkWidget *draw )
> {
> /* Code here to save your work */
> }
>
> ------- /CODE ----------
>
> --
> Tadej Borovšak
> tadeb...@gmail.com
> tadej.borov...@gmail.com
> _______________________________________________
> gtk-app-devel-list mailing list
> gtk-app-devel-list@gnome.org
> http://mail.gnome.org/mailman/listinfo/gtk-app-devel-list
>
_______________________________________________
gtk-app-devel-list mailing list
gtk-app-devel-list@gnome.org
http://mail.gnome.org/mailman/listinfo/gtk-app-devel-list
