public bool AddDatasource(IDatasource ds, string layerName = "")
{
int addedCount = 0;
var layers = _context.Map.Layers;
foreach (var layer in ds.GetLayers())
{
// projection mistmatch testing
var newLayer = TestProjectionMismatch(layer, out _aborted);
if (_aborted)
{
return(false);
}
if (newLayer == null)
{
continue;
}
// ask plugins if they don't object
var args = new DatasourceCancelEventArgs(newLayer);
_broadcaster.BroadcastEvent(p => p.BeforeLayerAdded_, _context.Map, args);
if (args.Cancel)
{
return(false);
}
int layerHandle = layers.Add(newLayer);
if (layerHandle != -1)
{
var ll = layers.ItemByHandle(layerHandle);
ll.Name = string.IsNullOrWhiteSpace(layerName) ? layer.Name : layerName;
addedCount++;
_lastLayerHandle = layerHandle;
}
}
return(addedCount > 0); // currently at least one should be success to return success
}
/// <summary>
/// Performs actions necessary before adding layer to the map.
/// </summary>
private void BeforeLayerAdded(IMuteMap map, DatasourceCancelEventArgs e)
{
var raster = e.Datasource as IRasterSource;
if (raster != null)
{
if (!UpdateOverviews(raster))
{
e.Cancel = true;
}
}
var fs = e.Datasource as IFeatureSet;
if (fs != null)
{
if (!UpdateSpatialIndex(fs))
{
e.Cancel = true;
}
}
}
