Installs an accelerator that will cause the named action
to be activated when the key combination specificed by accelerator
is pressed.
accelerator must be a string that can be parsed by
gtk_accelerator_parse(), e.g. "<Primary>q" or
"<Control><Alt>p".
action_name must be the name of an action as it would be used
in the app menu, i.e. actions that have been added to the application
are referred to with an "app." prefix, and window-specific actions
with a "win." prefix.
GtkApplication also extracts accelerators out of 'accel' attributes
in the GMenuModels passed to gtk_application_set_app_menu() and
gtk_application_set_menubar(), which is usually more convenient
than calling this function for each accelerator.
Installs an accelerator that will cause the named action to be activated when the key combination specificed by accelerator is pressed. accelerator must be a string that can be parsed by gtk_accelerator_parse(), e.g. "<Primary>q" or "<Control><Alt>p". action_name must be the name of an action as it would be used in the app menu, i.e. actions that have been added to the application are referred to with an "app." prefix, and window-specific actions with a "win." prefix. GtkApplication also extracts accelerators out of 'accel' attributes in the GMenuModels passed to gtk_application_set_app_menu() and gtk_application_set_menubar(), which is usually more convenient than calling this function for each accelerator.