GtkWidget *
get_notebook_page(GtkWidget * widget)
{
g_return_val_if_fail(GTK_IS_WIDGET(widget), NULL);
while (widget && widget->parent && !gtk_type_is_a(GTK_WIDGET_TYPE(widget->parent), GTK_TYPE_NOTEBOOK))
widget = widget->parent;
if (!(widget && widget->parent && gtk_type_is_a(GTK_WIDGET_TYPE(widget->parent), GTK_TYPE_NOTEBOOK)))
return NULL;
return widget;
}
GtkTypeClass*
gtk_type_check_class_cast (GtkTypeClass *klass,
GtkType cast_type)
{
if (!klass)
{
g_warning ("invalid class cast from (NULL) pointer to `%s'",
gtk_type_descriptive_name (cast_type));
return klass;
}
/* currently, GTK_TYPE_OBJECT is the lowest fundamental type
* dominator for types that introduce classes.
*/
if (klass->type < GTK_TYPE_OBJECT)
{
g_warning ("invalid class type `%s' in class cast to `%s'",
gtk_type_descriptive_name (klass->type),
gtk_type_descriptive_name (cast_type));
return klass;
}
if (!gtk_type_is_a (klass->type, cast_type))
{
g_warning ("invalid class cast from `%s' to `%s'",
gtk_type_descriptive_name (klass->type),
gtk_type_descriptive_name (cast_type));
return klass;
}
return klass;
}
GtkTypeObject*
gtk_type_check_object_cast (GtkTypeObject *type_object,
GtkType cast_type)
{
if (!type_object)
{
g_warning ("invalid cast from (NULL) pointer to `%s'",
gtk_type_descriptive_name (cast_type));
return type_object;
}
if (!type_object->klass)
{
g_warning ("invalid unclassed pointer in cast to `%s'",
gtk_type_descriptive_name (cast_type));
return type_object;
}
/* currently, GTK_TYPE_OBJECT is the lowest fundamental type
* dominator for types that introduce classes.
*/
if (type_object->klass->type < GTK_TYPE_OBJECT)
{
g_warning ("invalid class type `%s' in cast to `%s'",
gtk_type_descriptive_name (type_object->klass->type),
gtk_type_descriptive_name (cast_type));
return type_object;
}
if (!gtk_type_is_a (type_object->klass->type, cast_type))
{
g_warning ("invalid cast from `%s' to `%s'",
gtk_type_descriptive_name (type_object->klass->type),
gtk_type_descriptive_name (cast_type));
return type_object;
}
return type_object;
}
