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 gtk.Widget handling
for determining whether an accelerator can be activated.
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 gtk.Widget handling for determining whether an accelerator can be activated.