signal callback delegate or function to connect
bool callback(uint signalId, gtk.widget.Widget widget)
signalId the ID of a signal installed on widget (optional)
widget the instance the signal is connected to (optional)
Returns true if the signal can be activated.
Yes.After to execute callback after default handler, No.After to execute before (default)
Signal ID
Connect to CanActivateAccel signal.
Determines whether an accelerator that activates the signal identified by signal_id can currently be activated. This signal is present to allow applications and derived widgets to override the default #GtkWidget handling for determining whether an accelerator can be activated.