internal static Geometries.GeometryCollection ToSharpMapGeometryCollection(NTSGeometryCollection geom)
{
Geometries.GeometryCollection collection = new Geometries.GeometryCollection();
foreach (NTSGeometry geometry in geom.Geometries)
{
collection.Collection.Add(ToSharpMapGeometry(geometry));
}
return(collection);
}
internal static NTSGeometryCollection ToNTSGeometryCollection(Geometries.GeometryCollection geom,
IGeometryFactory factory)
{
NTSGeometry[] geometries = new NTSGeometry[geom.Collection.Count];
int index = 0;
foreach (Geometries.Geometry geometry in geom.Collection)
{
geometries[index++] = ToNTSGeometry(geometry, factory);
}
return(factory.CreateGeometryCollection(geometries) as NTSGeometryCollection);
}
public override void Render(System.Drawing.Graphics g, Map map)
{
if (this.Style.Enabled && this.Style.MaxVisible >= map.Zoom && this.Style.MinVisible < map.Zoom)
{
if (this.DataSource == null)
{
throw (new ApplicationException("DataSource property not set on layer '" + this.LayerName + "'"));
}
g.TextRenderingHint = this.TextRenderingHint;
g.SmoothingMode = this.SmoothingMode;
SharpMap.Geometries.BoundingBox envelope = map.Envelope; //View to render
if (this.CoordinateTransformation != null)
{
envelope = SharpMap.CoordinateSystems.Transformations.GeometryTransform.TransformBox(envelope, this.CoordinateTransformation.MathTransform.Inverse());
}
SharpMap.Data.FeatureDataSet ds = new SharpMap.Data.FeatureDataSet();
this.DataSource.Open();
this.DataSource.ExecuteIntersectionQuery(envelope, ds);
this.DataSource.Close();
if (ds.Tables.Count == 0)
{
base.Render(g, map);
return;
}
SharpMap.Data.FeatureDataTable features = (SharpMap.Data.FeatureDataTable)ds.Tables[0];
//Initialize label collection
List <Rendering.Label> labels = new List <SharpMap.Rendering.Label>();
//List<System.Drawing.Rectangle> LabelBoxes; //Used for collision detection
//Render labels
for (int i = 0; i < features.Count; i++)
{
SharpMap.Data.FeatureDataRow feature = features[i];
if (this.CoordinateTransformation != null)
{
features[i].Geometry = SharpMap.CoordinateSystems.Transformations.GeometryTransform.TransformGeometry(features[i].Geometry, this.CoordinateTransformation.MathTransform);
}
SharpMap.Styles.LabelStyle style = null;
if (this.Theme != null) //If thematics is enabled, lets override the style
{
style = this.Theme.GetStyle(feature) as SharpMap.Styles.LabelStyle;
}
else
{
style = this.Style;
}
float rotation = 0;
if (!String.IsNullOrEmpty(this.RotationColumn))
{
float.TryParse(feature[this.RotationColumn].ToString(), System.Globalization.NumberStyles.Any, SharpMap.Map.numberFormat_EnUS, out rotation);
}
string text;
if (_getLabelMethod != null)
{
text = _getLabelMethod(feature);
}
else
{
text = feature[this.LabelColumn].ToString();
}
if (text != null && text != String.Empty)
{
if (feature.Geometry is SharpMap.Geometries.GeometryCollection)
{
if (this.MultipartGeometryBehaviour == MultipartGeometryBehaviourEnum.All)
{
foreach (SharpMap.Geometries.Geometry geom in (feature.Geometry as Geometries.GeometryCollection))
{
SharpMap.Rendering.Label lbl = CreateLabel(geom, text, rotation, style, map, g);
if (lbl != null)
{
labels.Add(lbl);
}
}
}
else if (this.MultipartGeometryBehaviour == MultipartGeometryBehaviourEnum.CommonCenter)
{
SharpMap.Rendering.Label lbl = CreateLabel(feature.Geometry, text, rotation, style, map, g);
if (lbl != null)
{
labels.Add(lbl);
}
}
else if (this.MultipartGeometryBehaviour == MultipartGeometryBehaviourEnum.First)
{
if ((feature.Geometry as Geometries.GeometryCollection).Collection.Count > 0)
{
SharpMap.Rendering.Label lbl = CreateLabel((feature.Geometry as Geometries.GeometryCollection).Collection[0], text, rotation, style, map, g);
if (lbl != null)
{
labels.Add(lbl);
}
}
}
else if (this.MultipartGeometryBehaviour == MultipartGeometryBehaviourEnum.Largest)
{
Geometries.GeometryCollection coll = (feature.Geometry as Geometries.GeometryCollection);
if (coll.NumGeometries > 0)
{
double largestVal = 0;
int idxOfLargest = 0;
for (int j = 0; j < coll.NumGeometries; j++)
{
SharpMap.Geometries.Geometry geom = coll.Geometry(j);
if (geom is Geometries.LineString && ((Geometries.LineString)geom).Length > largestVal)
{
largestVal = ((Geometries.LineString)geom).Length;
idxOfLargest = j;
}
if (geom is Geometries.MultiLineString && ((Geometries.MultiLineString)geom).Length > largestVal)
{
largestVal = ((Geometries.LineString)geom).Length;
idxOfLargest = j;
}
if (geom is Geometries.Polygon && ((Geometries.Polygon)geom).Area > largestVal)
{
largestVal = ((Geometries.Polygon)geom).Area;
idxOfLargest = j;
}
if (geom is Geometries.MultiPolygon && ((Geometries.MultiPolygon)geom).Area > largestVal)
{
largestVal = ((Geometries.MultiPolygon)geom).Area;
idxOfLargest = j;
}
}
SharpMap.Rendering.Label lbl = CreateLabel(coll.Geometry(idxOfLargest), text, rotation, style, map, g);
if (lbl != null)
{
labels.Add(lbl);
}
}
}
}
else
{
SharpMap.Rendering.Label lbl = CreateLabel(feature.Geometry, text, rotation, style, map, g);
if (lbl != null)
{
labels.Add(lbl);
}
}
}
}
if (labels.Count > 0) //We have labels to render...
{
if (this.Style.CollisionDetection && this._LabelFilter != null)
{
this._LabelFilter(labels);
}
for (int i = 0; i < labels.Count; i++)
{
SharpMap.Rendering.VectorRenderer.DrawLabel(g, labels[i].LabelPoint, labels[i].Style.Offset, labels[i].Style.Font, labels[i].Style.ForeColor, labels[i].Style.BackColor, Style.Halo, labels[i].Rotation, labels[i].Text, map);
}
}
labels = null;
}
base.Render(g, map);
}
internal static Geometries.GeometryCollection ToSharpMapGeometryCollection(NTSGeometryCollection geom)
{
Geometries.GeometryCollection collection = new Geometries.GeometryCollection();
foreach (NTSGeometry geometry in geom.Geometries)
collection.Collection.Add(ToSharpMapGeometry(geometry));
return collection;
}
