I have no idea what changed, but this just started working. C++
derived classes are working like expected.
On 10/18/06, Matt Hoosier <[EMAIL PROTECTED]> wrote:
> On 10/18/06, Murray Cumming <[EMAIL PROTECTED]> wrote:
> > On Tue, 2006-10-17 at 15:26 -0500, Matt Hoosier wrote:
> > > I'd like to install a pixmap (not known until runtime) as the
> > > background image for a widget.
> > >
> > > Using a custom RcStyle with the "bg_pixmap" property set seems like it
> > > ought to do the chore:
> > >
> > > Gtk::Widget w = ...;
> > > const Glib::RefPtr<Gtk::RcStyle> style = Gtk::RcStyle::create ();
> > > style->set_bg_pixmap_name (Gtk::STATE_NORMAL, "/path/to/image.png");
> > > w.modify_style (style);
> > >
> > > This only seems to work for those classes (and not their derived
> > > classes) which are not GTK_WIDGET_NO_WINDOW. That is, it works for
> > > Gtk::DrawingArea, Gtk::EventBox, and a couple of others.
> > >
> > > If I try to instantiate "w" above as an instance of the following class:
> > >
> > > class DerivedEventBox : public Gtk::EventBox
> > > {
> > > public:
> > > DerivedEventBox () : Gtk::EventBox () {}
> > > virtual ~DerivedEventBox() {}
> > > };
> > >
> > > the background PNG does not appear. Yet if I do a trivial
> > > GObject-based subclass of GtkEventBox and use the result of
> > > Glib::wrap() as the value of "w" above, the pixmap appears [as
> > > expected?].
> > >
> > > Is there some subtlety to the way that the GType inheritance works in
> > > parallel with the C++ inheritance?
> >
> > I wonder whether this bug is causing it:
> > http://bugzilla.gnome.org/show_bug.cgi?id=343012
> >
> > Can you try the GTK+ patch to rule that out?
>
> As it happens, I already apply that patch on my Gtk+ build.
>
> >
> > --
> > Murray Cumming
> > [EMAIL PROTECTED]
> > www.murrayc.com
> > www.openismus.com
> >
> >
>
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