VikTrwLayerTpwin *vik_trw_layer_tpwin_new ( GtkWindow *parent );
void vik_trw_layer_tpwin_set_empty ( VikTrwLayerTpwin *tpwin );
void vik_trw_layer_tpwin_disable_join ( VikTrwLayerTpwin *tpwin );
VikTrwLayerTpwin *vik_trw_layer_tpwin_new ( GtkWindow *parent );
void vik_trw_layer_tpwin_set_empty ( VikTrwLayerTpwin *tpwin );
void vik_trw_layer_tpwin_disable_join ( VikTrwLayerTpwin *tpwin );