void OnSwitchChange(object sender, EventArgs e)
{
MapSwitch item = (MapSwitch)sender;
UpdateBaseLayer(new Section {
OSM = new NameValuePair {
Value = currentOSM
}, Type = SectionType.None
}, currentSelection);
}
MapSwitch GetSwitch(string text, string name)
{
int screenWidth = context.Resources.DisplayMetrics.WidthPixels;
int padding = (int)(screenWidth * 0.05);
int width = (int)(screenWidth / 2);
MapSwitch view = new MapSwitch(context);
view.Text = text;
view.ParameterName = name;
var parameters = new LinearLayout.LayoutParams(width, (int)(width / 5), 1);
parameters.LeftMargin = padding;
parameters.TopMargin = (int)(padding * 0.75f);
view.LayoutParameters = parameters;
return(view);
}
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);
}
else if (section.Type == SectionType.None)
{
// Switch was tapped
}
if (currentOSM == "nutiteq.osm")
{
var decoder = ((currentLayer as CartoOnlineVectorTileLayer).TileDecoder as MBVectorTileDecoder);
MapSwitch texts = ContentView.Menu.Texts3D;
MapSwitch buildings = ContentView.Menu.Buildings3D;
decoder.SetStyleParameter(texts.ParameterName, texts.IsChecked.ToString());
decoder.SetStyleParameter(buildings.ParameterName, buildings.IsChecked.ToString());
decoder.SetStyleParameter(texts.ParameterName, texts.ParameterValue);
decoder.SetStyleParameter(buildings.ParameterName, texts.ParameterValue);
}
MapView.Layers.Clear();
MapView.Layers.Add(currentLayer);
ContentView.Menu.Hide();
currentListener = null;
// Random if case to remove "unused variable" warning
if (currentListener != null)
{
currentListener.Dispose();
}
currentListener = MapView.InitializeVectorTileListener(VectorLayer);
}