Function

GObjectSignalEmissionHook

Declaration 

gboolean
(* GSignalEmissionHook) (
  GSignalInvocationHint* ihint,
  guint n_param_values,
  const GValue* param_values,
  gpointer data
)

Description

A simple function pointer to get invoked when the signal is emitted.

Emission hooks allow you to tie a hook to the signal type, so that it will trap all emissions of that signal, from any object.

You may not attach these to signals created with the G_SIGNAL_NO_HOOKS flag.

Parameters

ihint

Type: GSignalInvocationHint

Signal invocation hint, see GSignalInvocationHint.

The data is owned by the caller of the function.
n_param_values

Type: guint

The number of parameters to the function, including the instance on which the signal was emitted.

param_values

Type: An array of GValue

The instance on which the signal was emitted, followed by the parameters of the emission.

The length of the array is specified in the n_param_values argument.
The data is owned by the caller of the function.
data

Type: gpointer

User data associated with the hook.

The argument can be NULL.
The data is owned by the caller of the function.

Return value

Type: gboolean

Whether it wants to stay connected. If it returns FALSE, the signal hook is disconnected (and destroyed).