- VikLayerParamData (*getparam) (gpointer,guint16,gboolean),
- gpointer pass_along_getparam );
+ VikLayerParamData (*getparam) (gpointer,guint16,gboolean), // AKA VikLayerFuncGetParam in viklayer.h
+ gpointer pass_along_getparam,
+ void (*changeparam) (GtkWidget*, ui_change_values) ); // AKA VikLayerFuncChangeParam in viklayer.h