Function

GObjectsignal_new_class_handler

Declaration [src]

guint
g_signal_new_class_handler (
  const gchar* signal_name,
  GType itype,
  GSignalFlags signal_flags,
  GCallback class_handler,
  GSignalAccumulator accumulator,
  gpointer accu_data,
  GSignalCMarshaller c_marshaller,
  GType return_type,
  guint n_params,
  ...
)

Description [src]

Creates a new signal. (This is usually done in the class initializer.)

This is a variant of g_signal_new() that takes a C callback instead of a class offset for the signal’s class handler. This function doesn’t need a function pointer exposed in the class structure of an object definition, instead the function pointer is passed directly and can be overridden by derived classes with g_signal_override_class_closure() or g_signal_override_class_handler()and chained to with g_signal_chain_from_overridden() or g_signal_chain_from_overridden_handler().

See g_signal_new() for information about signal names.

If c_marshaller is NULL, g_cclosure_marshal_generic() will be used as the marshaller for this signal.

Available since:2.18

Parameters

signal_name const gchar*
 

The name for the signal.

 The data is owned by the caller of the function.
 The string is a NUL terminated UTF-8 string.
itype GType
 

The type this signal pertains to. It will also pertain to types which are derived from this type.

signal_flags GSignalFlags
 

A combination of GSignalFlags specifying detail of when the default handler is to be invoked. You should at least specify G_SIGNAL_RUN_FIRST or G_SIGNAL_RUN_LAST.

class_handler GCallback
 

A GCallback which acts as class implementation of this signal. Used to invoke a class method generically. Pass NULL to not associate a class method with this signal.

accumulator GSignalAccumulator
 

The accumulator for this signal; may be NULL.

accu_data gpointer
 

User data for the accumulator.

c_marshaller GSignalCMarshaller
 

The function to translate arrays of parameter values to signal emissions into C language callback invocations or NULL.

return_type GType
 

The type of return value, or #G_TYPE_NONE for a signal without a return value.

n_params guint
 

The number of parameter types to follow.

...
 

A list of types, one for each parameter.

Return value

Returns: guint
 

The signal id.