protected virtual void UpdateBaseLayer()
{
string styleAssetName = vectorStyleName + ".zip";
bool styleBuildings3D = false;
if (vectorStyleName.Equals("nutibright3d"))
{
styleAssetName = BaseStyleFile;
styleBuildings3D = true;
}
BinaryData styleBytes = AssetUtils.LoadAsset(styleAssetName);
if (styleBytes == null)
{
Toast.MakeText(this, "Map style file must be in project assets: " + vectorStyleName, ToastLength.Short).Show();
return;
}
// Create style set
CompiledStyleSet vectorTileStyleSet = new CompiledStyleSet(new ZippedAssetPackage(styleBytes));
vectorTileDecoder = new MBVectorTileDecoder(vectorTileStyleSet);
// Set language, language-specific texts from vector tiles will be used
vectorTileDecoder.SetStyleParameter("lang", vectorStyleLang);
// OSM Bright style set supports choosing between 2d/3d buildings. Set corresponding parameter.
if (styleAssetName.Equals(BaseStyleFile))
{
vectorTileDecoder.SetStyleParameter("buildings3d", styleBuildings3D ? "1" : "0");
vectorTileDecoder.SetStyleParameter("markers3d", styleBuildings3D ? "1" : "0");
vectorTileDecoder.SetStyleParameter("texts3d", styleBuildings3D ? "1" : "0");
}
// Create tile data source for vector tiles
if (vectorTileDataSource == null)
{
vectorTileDataSource = CreateTileDataSource();
}
// Remove old base layer, create new base layer
if (BaseLayer != null)
{
MapView.Layers.Remove(BaseLayer);
}
BaseLayer = new VectorTileLayer(vectorTileDataSource, vectorTileDecoder);
MapView.Layers.Insert(0, BaseLayer);
}
void UpdateLanguage(string code)
{
if (currentLayer == null)
{
return;
}
MBVectorTileDecoder decoder = (currentLayer as VectorTileLayer).TileDecoder as MBVectorTileDecoder;
decoder.SetStyleParameter("lang", code);
}
