I'm trying to render the button with this approach, but I've had no
luck. In the render_vfunc in my cellrenderer. My cellrenderer
derives from Gtk::CellRendererPixbuf. But the text for the button is
not displayed and the button looks like something gray as if
it weren't a real Gtk::Button.
void render_vfunc(Glib::RefPtr<Gdk::Drawable> const & window,
Gtk::Widget& widget,
Gdk::Rectangle const & background_area,
Gdk::Rectangle const & cell_area,
Gdk::Rectangle const & expose_area,
Gtk::CellRendererState flags) {
OffscreenWindow osw;
Gtk::Button b(property_url_);
osw.add(b);
osw.show_all();
auto pixbuf = osw.get_pixbuf();
property_pixbuf() = pixbuf;
CellRendererPixbuf::render_vfunc(window, widget,
background_area, cell_area, expose_area, flags);
}
I couldn't use a Gtk::TreeModelColumn<URL*> in any way. I had to use
Gtk::TreeModelColumn<Glib::ustring> but that's not
what I want.
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