Re: Signal handler not called

[Luca Cappa <luca cappa i-medlab com>]

Luca Cappa wrote:

> Hello,
>
> I created a custom widget which extends the Gtk::Frame class. I add to 
> it a HBox and inside this box a gtkglextmm widget (which extends from 
> Gtk::DrawingArea and public Gtk::GL::Widget<View2D>), and a 
> Gtk::HScale. In the constructor of the Gtk::Frame custom class i put:
>
>    mScale.set_digits (0);
>    mScale.set_draw_value (true);
>    crap = mScale.signal_value_changed ().connect (
>        sigc::mem_fun (*this, &klSliceViewer::sliderChangedEvent));
>    std::cout << (crap.connected () ? "connected" : "unconnected") << 
> std::endl;
>    std::cout << (crap.empty () ? "empty" : "not empty") << std::endl;
>    Gtk::Adjustment lAdj (0, 0, 255, 1, 1, 0);
>    mScale.set_adjustment  (lAdj);

Here there was the problem. Indeed the Gtk::Adjustment would be 
destroyed just after the constructor og my widget exits. Now the Adj 
object is a class member and no more a localvariable, and it works like 
a charm :)