Hi Tomas, Now that is what I call a seriously good explanation! Thanks a lot.
/jan [EMAIL PROTECTED] wrote: > On Wed, Aug 16, 2006 at 06:02:27AM +0100, jan wrote: >>> Progss wrote: >>>> [EMAIL PROTECTED] napisa?(a): >>>>> Is there a function that allows one to search for a widget using its >>>>> name or label? I'm using Glade 2 to design a window (just a basic >>>>> input form), and each widget has a unique name. Unfortunately Glade >>>>> doean't save any global pointers to the widgets; I can only assume >>>>> that there must be another way to find the objects from within the >>>>> callback functions. >>>> Absolutely, there is - glade_xml_get_widget >>>> >>>> e.g. >>>> http://lists.ximian.com/pipermail/glade-users/2004-February/001790.html >>>> >>>> Regards, >>>> Waldek >>>> >>> Thanks! >>> >>> Now on to the next question: What if I wasn't using Glade? The gtk+ >>> documentation isn't exactly intuitive. > > Then the widgets don't have names ;-) > > Remember: you put names on the widgets with glade? > > But of course, there is nothing magical about it. If you peek into any > glade project source, there is this pesky "support.c", and there you'll > see: > > | GtkWidget* > | lookup_widget (GtkWidget *widget, > | const gchar *widget_name) > | { > | GtkWidget *parent, *found_widget; > | > | for (;;) > | { > | if (GTK_IS_MENU (widget)) > | parent = gtk_menu_get_attach_widget (GTK_MENU (widget)); > | else > | parent = widget->parent; > | if (!parent) > | parent = (GtkWidget*) g_object_get_data (G_OBJECT (widget), > "GladeParentKey"); > | if (parent == NULL) > | break; > | widget = parent; > | } > | > | found_widget = (GtkWidget*) g_object_get_data (G_OBJECT (widget), > | widget_name); > | if (!found_widget) > | g_warning ("Widget not found: %s", widget_name); > | return found_widget; > | } > > So what it's doing? First it climbs up the widget hierarchy along the > parent lines (with some special cases for menus and some extra > relationships set by glade with the help of a special "GladeParentKey" > widget prop. When this grand-grand-grandpa widget is found, it is > expected to contain a "database of widgets keyed by name" in its > properties. > > Glade generates code to set up all this in interface.c, which looks > more-or-less like > > | /* Store pointers to all widgets, for use by lookup_widget(). */ > | GLADE_HOOKUP_OBJECT_NO_REF (itlist_window, itlist_window, > "itlist_window"); > | GLADE_HOOKUP_OBJECT (itlist_window, vbox, "vbox"); > | GLADE_HOOKUP_OBJECT (itlist_window, menu, "menu"); > | GLADE_HOOKUP_OBJECT (itlist_window, menuitem1, "menuitem1"); > | GLADE_HOOKUP_OBJECT (itlist_window, menu1, "menu1"); > > (and on for many lines). > > It's an exercise for the reader to find out what the macro > GLADE_HOOKUP_OBJECT does... > > HTH > -- tomás _______________________________________________ gtk-app-devel-list mailing list gtk-app-devel-list@gnome.org http://mail.gnome.org/mailman/listinfo/gtk-app-devel-list
