protected override SharpMap.Rendering.Label CreateLabel(SharpMap.Geometries.Geometry feature, string text, float rotation, SharpMap.Styles.LabelStyle style, Map map, System.Drawing.Graphics g)
{
//System.Drawing.SizeF size = g.MeasureString(text, style.Font);
System.Drawing.PointF position = map.WorldToImage(feature.GetBoundingBox().GetCentroid());
//position.X = position.X - size.Width * (short)style.HorizontalAlignment * 0.5f;
//position.Y = position.Y - size.Height * (short)style.VerticalAlignment * 0.5f;
if (position.X /*- size.Width*/ > map.Size.Width || position.X /*+ size.Width */< 0 ||
position.Y /*- size.Height*/ > map.Size.Height || position.Y /*+ size.Height*/ < 0)
return null;
else
{
SharpMap.Rendering.Label lbl;
if (!style.CollisionDetection)
lbl = new SharpMap.Rendering.Label(text, position, rotation, this.Priority, null, style);
else
{
//Collision detection is enabled so we need to measure the size of the string
lbl = new SharpMap.Rendering.Label(text, position, rotation, this.Priority,
new SharpMap.Rendering.LabelBox(position.X /*- size.Width * 0.5f*/ - style.CollisionBuffer.Width, position.Y + /*size.Height * 0.5f*/ + style.CollisionBuffer.Height,
/*size.Width +*/ 2f * style.CollisionBuffer.Width, /*size.Height +*/ style.CollisionBuffer.Height * 2f), style);
}
if (feature.GetType() == typeof(SharpMap.Geometries.LineString))
{
SharpMap.Geometries.LineString line = feature as SharpMap.Geometries.LineString;
if (line.Length / map.PixelSize > 40/*size.Width*/) //Only label feature if it is long enough
CalculateLabelOnLinestring(line, ref lbl, map);
else
return null;
}
return lbl;
}
}
public void ExecuteIntersectionQuery(SharpMap.Geometries.Geometry geom, SharpMap.Data.FeatureDataSet ds)
{
ExecuteIntersectionQuery(geom.GetBoundingBox(), ds);
}
/// <summary>
/// Returns the data associated with all the geometries that are intersected by 'geom'.
/// Please note that the ShapeFile provider currently doesn't fully support geometryintersection
/// and thus only BoundingBox/BoundingBox querying are performed. The results are NOT
/// guaranteed to lie withing 'geom'.
/// </summary>
/// <param name="geom"></param>
/// <param name="ds">FeatureDataSet to fill data into</param>
public void ExecuteIntersectionQuery(SharpMap.Geometries.Geometry geom, FeatureDataSet ds)
{
SharpMap.Data.FeatureDataTable dt = (SharpMap.Data.FeatureDataTable)dbaseFile.NewTable;
SharpMap.Geometries.BoundingBox bbox = geom.GetBoundingBox();
//Get candidates by intersecting the spatial index tree
List<uint> objectlist = tree.Search(bbox);
if (objectlist.Count == 0)
return;
for (int j = 0; j < objectlist.Count; j++)
{
for (uint i = (uint)dt.Rows.Count - 1; i >= 0; i--)
{
FeatureDataRow fdr = GetFeature(objectlist[j],dt);
if (fdr.Geometry != null)
if (fdr.Geometry.GetBoundingBox().Intersects(bbox))
//replace above line with this: if(fdr.Geometry.Intersects(bbox)) when relation model is complete
if (FilterDelegate == null || FilterDelegate(fdr))
dt.AddRow(fdr);
}
}
ds.Tables.Add(dt);
}
public SharpMap.Data.FeatureDataRow FindGeoNearPoint(SharpMap.Geometries.Point pos, double amountGrow, ref double DistanceToSelected)
{
SharpMap.Geometries.BoundingBox bbox = pos.GetBoundingBox().Grow(amountGrow);
SharpMap.Data.FeatureDataSet ds = new SharpMap.Data.FeatureDataSet();
DataSource.ExecuteIntersectionQuery(bbox, ds);
System.Data.DataTable tbl = ds.Tables[0] as SharpMap.Data.FeatureDataTable;
GisSharpBlog.NetTopologySuite.IO.WKTReader reader = new GisSharpBlog.NetTopologySuite.IO.WKTReader();
GeoAPI.Geometries.IGeometry point = reader.Read(pos.ToString());
if (tbl.Rows.Count == 0)
return null;
double distance = point.Distance(reader.Read((tbl.Rows[0] as SharpMap.Data.FeatureDataRow).Geometry.ToString()));
SharpMap.Data.FeatureDataRow selectedFeature = tbl.Rows[0] as SharpMap.Data.FeatureDataRow;
if (tbl.Rows.Count > 1)
for (int i = 1; i < tbl.Rows.Count; i++)
{
GeoAPI.Geometries.IGeometry line = reader.Read((tbl.Rows[i] as SharpMap.Data.FeatureDataRow).Geometry.ToString());
if (point.Distance(line) < distance)
{
distance = point.Distance(line);
selectedFeature = tbl.Rows[i] as SharpMap.Data.FeatureDataRow;
}
}
DistanceToSelected = distance;
return selectedFeature;
}
public SharpMap.Data.FeatureDataSet SelectElements(SharpMap.Geometries.Point point, string layername)
{
return SelectElements(point.GetBoundingBox(), layername);
}
public void ZoomToElement(SharpMap.Geometries.Geometry Element)
{
if (Element == null)
return;
SharpMap.Geometries.Point point = Element.GetBoundingBox().GetCentroid().AsPoint();
if ((point.X == 0.0) && (point.Y == 0.0))
return;
_BaseMap.Center = Element.GetBoundingBox().GetCentroid();
_RealTimeMap.ZoomToBox(_BaseMap.Envelope);
_MapArea = _BaseMap.Envelope;
BaseMapRedrawn = false;
OverviewMapRedrawn = false;
RealTimeMapRedrawn = false;
RefreshViews();
}