signal callback delegate or function to connect
void callback(gtk.scale_button.ScaleButton scaleButton)
scaleButton the instance the signal is connected to (optional)
Yes.After to execute callback after default handler, No.After to execute before (default)
Signal ID
Connect to Popup signal.
The ::popup signal is a [keybinding signal]GtkBindingSignal which gets emitted to popup the scale widget.
The default bindings for this signal are Space, Enter and Return.