public override void ViewDidLoad()
{
base.ViewDidLoad();
BinaryData bytes = AssetUtils.LoadAsset("carto-fonts.zip");
ZippedAssetPackage package = new ZippedAssetPackage(bytes);
string css = JsonUtils.OfflinePackageCartoCSS;
var decoder = new MBVectorTileDecoder(new CartoCSSStyleSet(css, package));
TileDataSource source = FileUtils.CreateTileDataSource("offline-packages", "mbtiles");
var layer = new VectorTileLayer(source, decoder);
MapView.Layers.Add(layer);
}
protected override void OnCreate(Bundle savedInstanceState)
{
base.OnCreate(savedInstanceState);
BinaryData bytes = AssetUtils.LoadAsset("carto-fonts.zip");
ZippedAssetPackage package = new ZippedAssetPackage(bytes);
string css = JsonUtils.OfflinePackageCartoCSS;
var decoder = new MBVectorTileDecoder(new CartoCSSStyleSet(css, package));
TileDataSource source = FileUtils.CreateTileDataSource(this, "offline-packages.mbtiles");
var layer = new VectorTileLayer(source, decoder);
MapView.Layers.Add(layer);
}
void UpdateBaseLayer(Section section, string selection)
{
if (section.Type != SectionType.Language)
{
currentOSM = section.OSM.Value;
currentSelection = selection;
}
if (section.Type == SectionType.Vector)
{
if (currentOSM == "nutiteq.osm")
{
// Nutiteq styles are bundled with the SDK, we can initialize them via constuctor
if (currentSelection == "default")
{
currentLayer = new CartoOnlineVectorTileLayer(CartoBaseMapStyle.CartoBasemapStyleDefault);
}
else if (currentSelection == "gray")
{
currentLayer = new CartoOnlineVectorTileLayer(CartoBaseMapStyle.CartoBasemapStyleGray);
}
else
{
currentLayer = new CartoOnlineVectorTileLayer(CartoBaseMapStyle.CartoBasemapStyleDark);
}
}
else if (currentOSM == "mapzen.osm")
{
// Mapzen styles are all bundled in one .zip file.
// Selection contains both the style name and file name (cf. Sections.cs in Shared)
string fileName = currentSelection.Split(':')[0];
string styleName = currentSelection.Split(':')[1];
// Create a style set from the file and style
BinaryData styleAsset = AssetUtils.LoadAsset(fileName + ".zip");
var package = new ZippedAssetPackage(styleAsset);
CompiledStyleSet styleSet = new CompiledStyleSet(package, styleName);
// Create datasource and style decoder
var source = new CartoOnlineTileDataSource(currentOSM);
var decoder = new MBVectorTileDecoder(styleSet);
currentLayer = new VectorTileLayer(source, decoder);
}
ContentView.Menu.LanguageChoiceEnabled = true;
ResetLanguage();
}
else if (section.Type == SectionType.Raster)
{
// We know that the value of raster will be Positron or Darkmatter,
// as Nutiteq and Mapzen use vector tiles
// Additionally, raster tiles do not support language choice
string url = (currentSelection == "positron") ? Urls.Positron : Urls.DarkMatter;
TileDataSource source = new HTTPTileDataSource(1, 19, url);
currentLayer = new RasterTileLayer(source);
// Language choice not enabled in raster tiles
ContentView.Menu.LanguageChoiceEnabled = false;
}
else if (section.Type == SectionType.Language)
{
if (currentLayer is RasterTileLayer)
{
// Raster tile language chance is not supported
return;
}
UpdateLanguage(selection);
}
MapView.Layers.Clear();
MapView.Layers.Add(currentLayer);
ContentView.Menu.Hide();
currentListener = null;
currentListener = MapView.InitializeVectorTileListener(VectorLayer);
}
void UpdateBaseLayer(Section section, string selection)
{
if (section.Type != SectionType.Language)
{
currentOSM = section.OSM.Value;
currentSelection = selection;
}
if (section.Type == SectionType.Vector)
{
if (currentOSM == "nutiteq.osm")
{
// Nutiteq styles are bundled with the SDK, we can initialize them via constuctor
if (currentSelection == "default")
{
currentLayer = new CartoOnlineVectorTileLayer(CartoBaseMapStyle.CartoBasemapStyleDefault);
}
else if (currentSelection == "gray")
{
currentLayer = new CartoOnlineVectorTileLayer(CartoBaseMapStyle.CartoBasemapStyleGray);
}
else
{
currentLayer = new CartoOnlineVectorTileLayer(CartoBaseMapStyle.CartoBasemapStyleDark);
}
}
else if (currentOSM == "mapzen.osm")
{
// Mapzen styles are all bundled in one .zip file.
// Selection contains both the style name and file name (cf. Sections.cs in Shared)
string fileName = currentSelection.Split(':')[0];
string styleName = currentSelection.Split(':')[1];
// Create a style set from the file and style
BinaryData styleAsset = AssetUtils.LoadAsset("styles/" + fileName + ".zip");
var package = new ZippedAssetPackage(styleAsset);
CompiledStyleSet styleSet = new CompiledStyleSet(package, styleName);
// Create datasource and style decoder
var source = new CartoOnlineTileDataSource(currentOSM);
var decoder = new MBVectorTileDecoder(styleSet);
currentLayer = new VectorTileLayer(source, decoder);
}
Menu.LanguageChoiceEnabled = true;
ResetLanguage();
}
else if (section.Type == SectionType.Raster)
{
// We know that the value of raster will be Positron or Darkmatter,
// as Nutiteq and Mapzen use vector tiles
// Additionally, raster tiles do not support language choice
string url = (currentSelection == "positron") ? Urls.Positron : Urls.DarkMatter;
TileDataSource source = new HTTPTileDataSource(1, 19, url);
currentLayer = new RasterTileLayer(source);
// Language choice not enabled in raster tiles
Menu.LanguageChoiceEnabled = false;
}
else if (section.Type == SectionType.Language)
{
if (currentLayer is RasterTileLayer) {
// Raster tile language chance is not supported
return;
}
UpdateLanguage(selection);
}
MapView.Layers.Clear();
MapView.Layers.Add(currentLayer);
Menu.Hide();
currentListener = null;
currentListener = MapView.InitializeVectorTileListener(VectorLayer);
}
public static void Update(this MapView MapView, bool withListener, byte[] data, Action completed, Action <string> failed = null)
{
System.Threading.Tasks.Task.Run(delegate
{
var sourceId = Parser.GetSourceFromData(data);
BinaryData styleAsset = new BinaryData(data);
var package = new ZippedAssetPackage(styleAsset);
var styleSet = new CompiledStyleSet(package);
// UWP doesn't have a version released where simply changing the style set is supported,
// need to clear layers and recreate the entire thing
#if __UWP__
MapView.Layers.Clear();
var source = new CartoOnlineTileDataSource(OSM);
var decoder = new MBVectorTileDecoder(styleSet);
var layer = new VectorTileLayer(source, decoder);
Device.BeginInvokeOnMainThread(delegate
{
MapView.Layers.Add(layer);
if (completed != null)
{
completed();
}
});
#else
if (MapView.Layers.Count == 0)
{
if (sourceId == null)
{
sourceId = DefaultSourceId;
}
var source = new CartoOnlineTileDataSource(sourceId);
MBVectorTileDecoder decoder = null;
try
{
decoder = new MBVectorTileDecoder(styleSet);
}
catch (System.ApplicationException e)
{
if (failed != null)
{
failed(e.Message);
return;
}
}
var layer = new VectorTileLayer(source, decoder);
if (withListener)
{
var popupSource = new LocalVectorDataSource(MapView.Options.BaseProjection);
var popupLayer = new VectorLayer(popupSource);
MapView.Layers.Add(popupLayer);
layer.VectorTileEventListener = new VectorEventListener(popupSource);
}
Device.BeginInvokeOnMainThread(delegate
{
MapView.Layers.Add(layer);
if (completed != null)
{
completed();
}
});
}
else
{
var decoder = (MBVectorTileDecoder)(MapView.Layers[MapView.Layers.Count - 1] as VectorTileLayer).TileDecoder;
Device.BeginInvokeOnMainThread(delegate
{
decoder.CompiledStyle = styleSet;
if (completed != null)
{
completed();
}
});
}
#endif
});
}
