Golang mapnik_map_layer_name Examples

Example #1

File: mapnik.go Project: fawick/go-mapnik-1

func (m *Map) printLayerStatus() {
	n := C.mapnik_map_layer_count(m.m)
	for i := 0; i < int(n); i++ {
		fmt.Println(
			C.GoString(C.mapnik_map_layer_name(m.m, C.size_t(i))),
			C.mapnik_map_layer_is_active(m.m, C.size_t(i)),
		)
	}
}

Example #2

File: mapnik.go Project: fawick/go-mapnik-1

// SelectLayers enables/disables single layers. LayerSelector or SelectorFunc gets called for each layer.
func (m *Map) SelectLayers(selector LayerSelector) {
	m.storeLayerStatus()
	n := C.mapnik_map_layer_count(m.m)
	for i := 0; i < int(n); i++ {
		layerName := C.GoString(C.mapnik_map_layer_name(m.m, C.size_t(i)))
		switch selector.Select(layerName) {
		case Include:
			C.mapnik_map_layer_set_active(m.m, C.size_t(i), 1)
		case Exclude:
			C.mapnik_map_layer_set_active(m.m, C.size_t(i), 0)
		case Default:
		}
	}
}