Function

GObjectsignal_add_emission_hook

Declaration

gulong
g_signal_add_emission_hook (
  guint signal_id,
  GQuark detail,
  GSignalEmissionHook hook_func,
  gpointer hook_data,
  GDestroyNotify data_destroy
)

Description

Adds an emission hook for a signal, which will get called for any emission of that signal, independent of the instance. This is possible only for signals which don’t have G_SIGNAL_NO_HOOKS flag set.

Parameters

`signal_id`	`guint`
	The signal identifier, as returned by g_signal_lookup().
`detail`	`GQuark`
	The detail on which to call the hook.
`hook_func`	`GSignalEmissionHook`
	A `GSignalEmissionHook` function.
`hook_data`	`gpointer`
	User data for `hook_func`.
	The argument can be `NULL`.
	The data is owned by the caller of the function.
`data_destroy`	`GDestroyNotify`
	A `GDestroyNotify` for `hook_data`.
	The argument can be `NULL`.

Return value

Returns:	`gulong`
	The hook id, for later use with g_signal_remove_emission_hook().