register_progress_func

Sets the progress function for a given value_type, like:

  clutter_interval_register_progress_func (MY_TYPE_FOO,
                                           my_foo_progress);

Whenever a Interval instance using the default ClutterInterval::compute_value implementation is set as an interval between two Value of type value_type, it will call func to establish the value depending on the given progress, for instance:

  static gboolean
  my_int_progress (const GValue *a,
                   const GValue *b,
                   gdouble       progress,
                   GValue       *retval)
  {
    gint ia = g_value_get_int (a);
    gint ib = g_value_get_int (b);
    gint res = factor * (ib - ia) + ia;

    g_value_set_int (retval, res);

    return TRUE;
  }

  clutter_interval_register_progress_func (G_TYPE_INT, my_int_progress);

To unset a previously set progress function of a Type, pass null for func.

Parameters:

value_type	a Type
func	a ProgressFunc, or null to unset a previously set progress function