public Envelope GetZoneExtent(string zone)
{
Envelope extent = new Envelope();
CommonDataFrame dataFrame = AppContext.GetDataFrame(this);
foreach (Configuration.MapTabLayerRow mapTabLayer in GetMapTabLayerRows())
{
Configuration.LayerRow layer = mapTabLayer.LayerRow;
if (!layer.IsZoneFieldNull())
{
CommonLayer commonLayer = dataFrame.Layers.First(o => o.Name == layer.LayerName);
CommonField field = commonLayer.FindField(layer.ZoneField);
string zoneValue = field.IsNumeric ? zone : String.Format("'{0}'", zone);
extent = commonLayer.GetFeatureExtent(String.Format("{0} = {1}", field.Name, zoneValue));
if (!extent.IsNull)
{
break;
}
}
}
return(extent);
}
public Envelope GetExtent(FeatureType featureType)
{
Envelope extent = new Envelope();
string layerId = featureType == FeatureType.Selection ? _appState.SelectionLayer : _appState.TargetLayer;
Configuration config = AppContext.GetConfiguration();
Configuration.LayerRow layerRow = config.Layer.FindByLayerID(layerId);
CommonDataFrame dataFrame = AppContext.GetDataFrame(_appState.MapTab);
CommonLayer layer = dataFrame.Layers.FirstOrDefault(lyr => String.Compare(lyr.Name, layerRow.LayerName, true) == 0);
string query = GetQuery(featureType, layerRow, layer);
if (query != null)
{
extent = layer.GetFeatureExtent(query);
}
if (!extent.IsNull && extent.Width == 0 && extent.Height == 0)
{
extent = new Envelope(new Coordinate(extent.MinX - 50, extent.MinY - 50), new Coordinate(extent.MaxX + 50, extent.MaxY + 50));
}
return(extent);
}