You don't want to do it that way. you'll end up with a segfault when you try to derefence the null pointer.
My guess is that the description for this particular function was brought over from the GTK+ docs, since the GTK+ function used a pointer as an argument. In gtkmm, however, references are used in preference to pointers, so the 'if the argument is 0' comment doesn't make much sense since references can't be 0. Often in these sorts of cases, gtkmm will use function overloading to provide two different functions -- one with a reference argument and one without the argument at all. This doesn't seem to be the case here, so it doesn't appear that it's possible to get this behavior in gtkmm unless you call the GTK+ functions directly. Or maybe there's an alternate way to do it and I just don't know about it. jonner On 12/24/05, Shawn Artrip <[EMAIL PROTECTED]> wrote: > Gtk::Widget * widget = 0; > Gtk::TreeViewColumn::set_widget(*widget); > > this compiles fine but I don't know if it > runs the way the doc says it will. > > On Sat, 24 Dec 2005 06:13:51 -0500 > Doug McLain <[EMAIL PROTECTED]> wrote: > > > The docs at > > http://www.gtkmm.org/docs/gtkmm-2.4/docs/reference/html/classGtk_1_1TreeViewColumn.html#f5c3b04accb5fba7aa4c84e831b8b643 > > say that if widget is 0, then a Label will be used. I am passing 0 to > > this function, but I get: > > > > error: no matching function for call to > > 'Gtk::TreeViewColumn::set_widget(int)' > > note: candidates are: void Gtk::TreeViewColumn::set_widget(Gtk::Widget&) > > > > How do I do this right? I don't want to pass a real widget, I want it > > to do exactly what the docs say it does when widget is 0. > > > > Doug > > -- > > http://nostar.net/ > > _______________________________________________ > > gtkmm-list mailing list > > [email protected] > > http://mail.gnome.org/mailman/listinfo/gtkmm-list > _______________________________________________ > gtkmm-list mailing list > [email protected] > http://mail.gnome.org/mailman/listinfo/gtkmm-list >
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