public static void PositionMultiPolygon(CALayer shape, MultiPolygon multiPolygon, IStyle style, IViewport viewport)
{
var shapeLayer = shape as CAShapeLayer;
var path = multiPolygon.ToUIKit(viewport);
//var frame = ConvertBoundingBox (multiPolygon.GetBoundingBox(), viewport);
shapeLayer.Path = path.CGPath;
//shape.Frame = frame;
/*
if (viewport.Resolution > MinResolution || viewport.Resolution < MaxResolution) {
//recalculate
var newImage = RenderMultiPolygonOnLayer (multiPolygon, style, viewport);
shape.Contents = newImage.Contents;
shape.Frame = newImage.Frame;
var resolution = ZoomHelper.ClipResolutionToExtremes (Resolutions, viewport.Resolution);
MinResolution = ZoomHelper.ZoomOut (Resolutions, resolution);
MaxResolution = ZoomHelper.ZoomIn (Resolutions, resolution);
} else {
//reposition Geometry
var frame = ConvertBoundingBox (multiPolygon.GetBoundingBox(), viewport);
var newFrame = new RectangleF (frame.X, (frame.Y), frame.Width, frame.Height);
shape.Frame = newFrame;
//shape.Frame = frame;
}
*/
}
public void RenderGeometry(MultiPolygon multiPolygon, IStyle style, IFeature feature, IViewport viewport)
{
if (_bgWorker == null)
_bgWorker = new BackgroundWorker();
/*
while (_bgWorker.IsBusy) {
Thread.Sleep (00001);
}
*/
_bgWorker.RunWorkerCompleted += (sender, e) =>
{
var layer = e.Result as CALayer;
if (layer != null)
{
var styleKey = style.GetHashCode().ToString();
feature[styleKey] = layer;
}
};
_bgWorker.DoWork += delegate(object sender, DoWorkEventArgs e)
{
var layer = RenderImage(multiPolygon, style, viewport);
e.Result = layer;
};
_bgWorker.RunWorkerAsync();
}
/// <summary>
/// Return a copy of this geometry
/// </summary>
/// <returns>Copy of Geometry</returns>
public new MultiPolygon Clone()
{
var geoms = new MultiPolygon();
foreach (var polygon in Polygons)
{
geoms.Polygons.Add(polygon.Clone());
}
return(geoms);
}
private static CALayer RenderImage(MultiPolygon multiPolygon, IStyle style, IViewport viewport)
{
var geom = new CAShapeLayer();
if (!(style is VectorStyle)) throw new ArgumentException("Style is not of type VectorStyle");
var vectorStyle = style as VectorStyle;
float strokeAlpha = (float)vectorStyle.Outline.Color.A / 255;
float fillAlpha = (float)vectorStyle.Fill.Color.A / 255;
var strokeColor = new CGColor(new CGColor(vectorStyle.Outline.Color.R, vectorStyle.Outline.Color.G,
vectorStyle.Outline.Color.B), strokeAlpha);
var fillColor = new CGColor(new CGColor(vectorStyle.Fill.Color.R, vectorStyle.Fill.Color.G,
vectorStyle.Fill.Color.B), fillAlpha);
geom.StrokeColor = strokeColor;
geom.FillColor = fillColor;
geom.LineWidth = (float)vectorStyle.Outline.Width;
var bbRect = GeometryRenderer.ConvertBoundingBox(multiPolygon.GetBoundingBox(), viewport);
var offset = new CoreGraphics.CGPoint((int)bbRect.GetMinX(), (int)bbRect.GetMinY());
GeometryExtension.OffSet = offset;
var path = multiPolygon.ToUIKit(viewport);
var frame = new CGRect(0, 0, (int)((float)bbRect.GetMaxX() - (float)bbRect.GetMinX()), (int)((float)bbRect.GetMaxY() - (float)bbRect.GetMinY()));
var size = frame.Size;
geom.Path = path.CGPath;
UIGraphics.BeginImageContext((CGSize)size);
var context = UIGraphics.GetCurrentContext();
context.SetBlendMode(CGBlendMode.Multiply);
geom.RenderInContext(context);
var image = UIGraphics.GetImageFromCurrentImageContext();
var imageTile = new CALayer { Contents = image.CGImage, Frame = frame };
return imageTile;
}
public static CALayer RenderMultiPolygonOnLayer(MultiPolygon multiPolygon, IStyle style, IViewport viewport)
{
var tile = new CAShapeLayer();
if (!(style is VectorStyle)) throw new ArgumentException("Style is not of type VectorStyle");
var vectorStyle = style as VectorStyle;
var strokeAlpha = (float)vectorStyle.Outline.Color.A / 255;
var fillAlpha = (float)vectorStyle.Fill.Color.A / 255;
var strokeColor = new CGColor(new CGColor(vectorStyle.Outline.Color.R, vectorStyle.Outline.Color.G,
vectorStyle.Outline.Color.B), strokeAlpha);
var fillColor = new CGColor(new CGColor(vectorStyle.Fill.Color.R, vectorStyle.Fill.Color.G,
vectorStyle.Fill.Color.B), fillAlpha);
var path = multiPolygon.ToUIKit(viewport);
tile.StrokeColor = strokeColor;
tile.FillColor = fillColor;
tile.LineWidth = (float)vectorStyle.Outline.Width;
tile.Path = path.CGPath;
return tile;
}
/// <summary>
/// This method produces instances of type <see cref="Mapsui.Geometries.MultiPolygon"/>.
/// </summary>
/// <returns>The created geometries</returns>
internal override Collection<Geometry> CreateGeometries(Features features)
{
IPathNode multiPolygonNode = new PathNode(Gmlns, "MultiPolygon", (NameTable) XmlReader.NameTable);
IPathNode multiSurfaceNode = new PathNode(Gmlns, "MultiSurface", (NameTable) XmlReader.NameTable);
IPathNode multiPolygonNodeAlt = new AlternativePathNodesCollection(multiPolygonNode, multiSurfaceNode);
IPathNode polygonMemberNode = new PathNode(Gmlns, "polygonMember", (NameTable) XmlReader.NameTable);
IPathNode surfaceMemberNode = new PathNode(Gmlns, "surfaceMember", (NameTable) XmlReader.NameTable);
IPathNode polygonMemberNodeAlt = new AlternativePathNodesCollection(polygonMemberNode, surfaceMemberNode);
IPathNode linearRingNode = new PathNode(Gmlns, "LinearRing", (NameTable) XmlReader.NameTable);
var labelValue = new string[1];
bool geomFound = false;
try
{
// Reading the entire feature's node makes it possible to collect label values that may appear before or after the geometry property
while ((FeatureReader = GetSubReaderOf(XmlReader, null, FeatureNode)) != null)
{
while (
(GeomReader =
GetSubReaderOf(FeatureReader, labelValue, multiPolygonNodeAlt, polygonMemberNodeAlt)) != null)
{
var multiPolygon = new MultiPolygon();
GeometryFactory geomFactory = new PolygonFactory(GeomReader, FeatureTypeInfo);
Collection<Geometry> polygons = geomFactory.CreateGeometries(features);
foreach (Polygon polygon in polygons)
multiPolygon.Polygons.Add(polygon);
Geoms.Add(multiPolygon);
geomFound = true;
}
if (geomFound) features.Add(CreateFeature(Geoms[Geoms.Count - 1], FeatureTypeInfo.LableField, labelValue[0]));
geomFound = false;
}
}
catch (Exception ex)
{
Trace.TraceError("An exception occured while parsing a multi-polygon geometry: " + ex.Message);
throw;
}
return Geoms;
}
/// <summary>
/// Writes a multipolygon.
/// </summary>
/// <param name="mp">The mulitpolygon to be written.</param>
/// <param name="bWriter">Stream to write to.</param>
/// <param name="byteorder">Byte order</param>
private static void WriteMultiPolygon(MultiPolygon mp, BinaryWriter bWriter, WkbByteOrder byteorder)
{
//Write the number of polygons.
WriteUInt32((uint) mp.Polygons.Count, bWriter, byteorder);
//Loop on the number of polygons.
foreach (Polygon poly in mp.Polygons)
{
//Write polygon header
bWriter.Write((byte) byteorder);
WriteUInt32((uint) WKBGeometryType.WKBPolygon, bWriter, byteorder);
//Write each polygon.
WritePolygon(poly, bWriter, byteorder);
}
}
public static void Render(Graphics graphics, MultiPolygon pols, Brush brush, Pen pen, IViewport viewport)
{
foreach (var t in pols.Polygons)
PolygonRenderer.DrawPolygon(graphics, t, brush, pen, viewport);
}
/// <summary>
/// Converts a MultiPolygon to <MultiPolygon Tagged
/// Text> format, then Appends it to the writer.
/// </summary>
/// <param name="multiPolygon">The MultiPolygon to process</param>
/// <param name="writer">The output stream writer to Append to.</param>
private static void AppendMultiPolygonTaggedText(MultiPolygon multiPolygon, StringWriter writer)
{
writer.Write("MULTIPOLYGON ");
AppendMultiPolygonText(multiPolygon, writer);
}
/// <summary>
/// Reads and parses the geometry with ID 'oid' from the ShapeFile
/// </summary>
/// <remarks><see cref="FilterDelegate">Filtering</see> is not applied to this method</remarks>
/// <param name="oid">Object ID</param>
/// <returns>geometry</returns>
private Geometry ReadGeometry(uint oid)
{
brShapeFile.BaseStream.Seek(GetShapeIndex(oid) + 8, 0); //Skip record number and content length
ShapeType type = (ShapeType) brShapeFile.ReadInt32(); //Shape type
if (type == ShapeType.Null)
return null;
if (_ShapeType == ShapeType.Point || _ShapeType == ShapeType.PointM || _ShapeType == ShapeType.PointZ)
{
Point tempFeature = new Point();
return new Point(brShapeFile.ReadDouble(), brShapeFile.ReadDouble());
}
else if (_ShapeType == ShapeType.Multipoint || _ShapeType == ShapeType.MultiPointM ||
_ShapeType == ShapeType.MultiPointZ)
{
brShapeFile.BaseStream.Seek(32 + brShapeFile.BaseStream.Position, 0); //skip min/max box
MultiPoint feature = new MultiPoint();
int nPoints = brShapeFile.ReadInt32(); // get the number of points
if (nPoints == 0)
return null;
for (int i = 0; i < nPoints; i++)
feature.Points.Add(new Point(brShapeFile.ReadDouble(), brShapeFile.ReadDouble()));
return feature;
}
else if (_ShapeType == ShapeType.PolyLine || _ShapeType == ShapeType.Polygon ||
_ShapeType == ShapeType.PolyLineM || _ShapeType == ShapeType.PolygonM ||
_ShapeType == ShapeType.PolyLineZ || _ShapeType == ShapeType.PolygonZ)
{
brShapeFile.BaseStream.Seek(32 + brShapeFile.BaseStream.Position, 0); //skip min/max box
int nParts = brShapeFile.ReadInt32(); // get number of parts (segments)
if (nParts == 0)
return null;
int nPoints = brShapeFile.ReadInt32(); // get number of points
int[] segments = new int[nParts + 1];
//Read in the segment indexes
for (int b = 0; b < nParts; b++)
segments[b] = brShapeFile.ReadInt32();
//add end point
segments[nParts] = nPoints;
if ((int) _ShapeType%10 == 3)
{
MultiLineString mline = new MultiLineString();
for (int LineID = 0; LineID < nParts; LineID++)
{
LineString line = new LineString();
for (int i = segments[LineID]; i < segments[LineID + 1]; i++)
line.Vertices.Add(new Point(brShapeFile.ReadDouble(), brShapeFile.ReadDouble()));
mline.LineStrings.Add(line);
}
if (mline.LineStrings.Count == 1)
return mline[0];
return mline;
}
else //(_ShapeType == ShapeType.Polygon etc...)
{
//First read all the rings
List<LinearRing> rings = new List<LinearRing>();
for (int RingID = 0; RingID < nParts; RingID++)
{
LinearRing ring = new LinearRing();
for (int i = segments[RingID]; i < segments[RingID + 1]; i++)
ring.Vertices.Add(new Point(brShapeFile.ReadDouble(), brShapeFile.ReadDouble()));
rings.Add(ring);
}
bool[] IsCounterClockWise = new bool[rings.Count];
int PolygonCount = 0;
for (int i = 0; i < rings.Count; i++)
{
IsCounterClockWise[i] = rings[i].IsCCW();
if (!IsCounterClockWise[i])
PolygonCount++;
}
if (PolygonCount == 1) //We only have one polygon
{
Polygon poly = new Polygon();
poly.ExteriorRing = rings[0];
if (rings.Count > 1)
for (int i = 1; i < rings.Count; i++)
poly.InteriorRings.Add(rings[i]);
return poly;
}
else
{
MultiPolygon mpoly = new MultiPolygon();
Polygon poly = new Polygon();
poly.ExteriorRing = rings[0];
for (int i = 1; i < rings.Count; i++)
{
if (!IsCounterClockWise[i])
{
mpoly.Polygons.Add(poly);
poly = new Polygon(rings[i]);
}
else
poly.InteriorRings.Add(rings[i]);
}
mpoly.Polygons.Add(poly);
return mpoly;
}
}
}
else
throw (new ApplicationException("Shapefile type " + _ShapeType.ToString() + " not supported"));
}
public static void DrawMultiPolygon(Graphics graphics, MultiPolygon pols, Brush brush, Pen pen, IViewport viewport)
{
foreach (Polygon t in pols.Polygons)
DrawPolygon(graphics, t, brush, pen, viewport);
}
/// <summary>
/// Reads and parses the geometry with ID 'oid' from the ShapeFile
/// </summary>
/// <remarks><see cref="FilterDelegate">Filtering</see> is not applied to this method</remarks>
/// <param name="oid">Object ID</param>
/// <returns>geometry</returns>
// ReSharper disable once CyclomaticComplexity // Fix when changes need to be made here
private Geometry ReadGeometry(uint oid)
{
_brShapeFile.BaseStream.Seek(GetShapeIndex(oid) + 8, 0); //Skip record number and content length
var type = (ShapeType)_brShapeFile.ReadInt32(); //Shape type
if (type == ShapeType.Null)
return null;
if (_shapeType == ShapeType.Point || _shapeType == ShapeType.PointM || _shapeType == ShapeType.PointZ)
{
return new Point(_brShapeFile.ReadDouble(), _brShapeFile.ReadDouble());
}
if (_shapeType == ShapeType.Multipoint || _shapeType == ShapeType.MultiPointM ||
_shapeType == ShapeType.MultiPointZ)
{
_brShapeFile.BaseStream.Seek(32 + _brShapeFile.BaseStream.Position, 0); //skip min/max box
var feature = new MultiPoint();
int nPoints = _brShapeFile.ReadInt32(); // get the number of points
if (nPoints == 0)
return null;
for (int i = 0; i < nPoints; i++)
feature.Points.Add(new Point(_brShapeFile.ReadDouble(), _brShapeFile.ReadDouble()));
return feature;
}
if (_shapeType == ShapeType.PolyLine || _shapeType == ShapeType.Polygon ||
_shapeType == ShapeType.PolyLineM || _shapeType == ShapeType.PolygonM ||
_shapeType == ShapeType.PolyLineZ || _shapeType == ShapeType.PolygonZ)
{
_brShapeFile.BaseStream.Seek(32 + _brShapeFile.BaseStream.Position, 0); //skip min/max box
int nParts = _brShapeFile.ReadInt32(); // get number of parts (segments)
if (nParts == 0)
return null;
int nPoints = _brShapeFile.ReadInt32(); // get number of points
var segments = new int[nParts + 1];
//Read in the segment indexes
for (int b = 0; b < nParts; b++)
segments[b] = _brShapeFile.ReadInt32();
//add end point
segments[nParts] = nPoints;
if ((int)_shapeType % 10 == 3)
{
var mline = new MultiLineString();
for (int lineId = 0; lineId < nParts; lineId++)
{
var line = new LineString();
for (int i = segments[lineId]; i < segments[lineId + 1]; i++)
line.Vertices.Add(new Point(_brShapeFile.ReadDouble(), _brShapeFile.ReadDouble()));
mline.LineStrings.Add(line);
}
if (mline.LineStrings.Count == 1)
return mline[0];
return mline;
}
else //(_ShapeType == ShapeType.Polygon etc...)
{
//First read all the rings
var rings = new List<LinearRing>();
for (int ringId = 0; ringId < nParts; ringId++)
{
var ring = new LinearRing();
for (int i = segments[ringId]; i < segments[ringId + 1]; i++)
ring.Vertices.Add(new Point(_brShapeFile.ReadDouble(), _brShapeFile.ReadDouble()));
rings.Add(ring);
}
var isCounterClockWise = new bool[rings.Count];
int polygonCount = 0;
for (int i = 0; i < rings.Count; i++)
{
isCounterClockWise[i] = rings[i].IsCCW();
if (!isCounterClockWise[i])
polygonCount++;
}
if (polygonCount == 1) //We only have one polygon
{
var poly = new Polygon { ExteriorRing = rings[0] };
if (rings.Count > 1)
for (int i = 1; i < rings.Count; i++)
poly.InteriorRings.Add(rings[i]);
return poly;
}
else
{
var mpoly = new MultiPolygon();
var poly = new Polygon { ExteriorRing = rings[0] };
for (var i = 1; i < rings.Count; i++)
{
if (!isCounterClockWise[i])
{
mpoly.Polygons.Add(poly);
poly = new Polygon(rings[i]);
}
else
poly.InteriorRings.Add(rings[i]);
}
mpoly.Polygons.Add(poly);
return mpoly;
}
}
}
throw (new ApplicationException("Shapefile type " + _shapeType.ToString() + " not supported"));
}
public static XamlShapes.Path RenderMultiPolygon(MultiPolygon geometry, IStyle style, IViewport viewport)
{
if (!(style is VectorStyle)) throw new ArgumentException("Style is not of type VectorStyle");
var vectorStyle = style as VectorStyle;
XamlShapes.Path path = CreatePolygonPath(vectorStyle, viewport.Resolution);
path.Data = geometry.ToXaml();
path.RenderTransform = new XamlMedia.MatrixTransform { Matrix = CreateTransformMatrix1(viewport) };
return path;
}
/// <summary>
/// Return a copy of this geometry
/// </summary>
/// <returns>Copy of Geometry</returns>
public new MultiPolygon Clone()
{
var geoms = new MultiPolygon();
foreach (Polygon polygon in polygons)
geoms.Polygons.Add(polygon.Clone());
return geoms;
}
private static MultiPolygon CreateWKBMultiPolygon(BinaryReader reader, WkbByteOrder byteOrder)
{
// Get the number of Polygons.
var numPolygons = (int) ReadUInt32(reader, byteOrder);
// Create a new array for the Polygons.
var polygons = new MultiPolygon();
// Loop on the number of polygons.
for (int i = 0; i < numPolygons; i++)
{
// read polygon header
reader.ReadByte();
ReadUInt32(reader, byteOrder);
// TODO: Validate type
// Create the next polygon and add it to the array.
polygons.Polygons.Add(CreateWKBPolygon(reader, byteOrder));
}
//Create and return the MultiPolygon.
return polygons;
}
/// <summary>
/// Creates a <see cref="MultiPolygon"/> using the next token in the stream.
/// </summary>
/// <param name="tokenizer">tokenizer over a stream of text in Well-known Text
/// format. The next tokens must form a MultiPolygon.</param>
/// <returns>a <code>MultiPolygon</code> specified by the next token in the
/// stream, or if if the coordinates used to create the <see cref="Polygon"/>
/// shells and holes do not form closed linestrings.</returns>
private static MultiPolygon ReadMultiPolygonText(WktStreamTokenizer tokenizer)
{
var polygons = new MultiPolygon();
string nextToken = GetNextEmptyOrOpener(tokenizer);
if (nextToken == "EMPTY")
return polygons;
Polygon polygon = ReadPolygonText(tokenizer);
polygons.Polygons.Add(polygon);
nextToken = GetNextCloserOrComma(tokenizer);
while (nextToken == ",")
{
polygon = ReadPolygonText(tokenizer);
polygons.Polygons.Add(polygon);
nextToken = GetNextCloserOrComma(tokenizer);
}
return polygons;
}
protected override List<IGeometry> GetGeometries()
{
List<IGeometry> res = new List<IGeometry>();
MultiPolygon mult = new MultiPolygon();
Polygon poly = new Polygon();
mult.Polygons.Add(poly);
int current = 0;
for (int i = 0; i < _points.Count; i++)
{
Point p = _currentProjection.Project(_points[i].X, _points[i].Y);
if (p == null)
{
return null;
}
if (poly.ExteriorRing.Vertices.Count == 0)
{
poly.ExteriorRing.Vertices.Add(p);
}
else
{
var prev = _currentProjection.Inverse(poly.ExteriorRing.Vertices.LastOrDefault().X, poly.ExteriorRing.Vertices.LastOrDefault().Y);
if (Math.Abs(prev.X - _points[i].X) > 180)
{
double x1 = prev.X >= 0 ? 180 : -180;
double x2 = -x1;
double y = prev.Y + (_points[i].Y - prev.Y) * Math.Abs(x1 - prev.X) / (Math.Abs(_points[i].X - x2) + Math.Abs(x1 - prev.X));
var p1 = _currentProjection.Project(x1, y);
if (p1 != null)
{
poly.ExteriorRing.Vertices.Add(p1);
}
else
{
return null;
}
if (mult.Polygons.Count >= 2 && Math.Abs(mult.Polygons[current - 1].ExteriorRing.EndPoint.X - _points[i].X) < 180)
{
current--;
poly = mult.Polygons[current];
}
else
{
current++;
poly = new Polygon();
mult.Polygons.Add(poly);
}
var p2 = _currentProjection.Project(x2, y);
if (p2 != null)
{
poly.ExteriorRing.Vertices.Add(p2);
}
else
{
return null;
}
poly.ExteriorRing.Vertices.Add(p);
}
else
{
poly.ExteriorRing.Vertices.Add(p);
}
}
}
if (mult.Polygons.Count > 1)
{
res.Add(mult);
}
res.Add(poly);
return res;
}
/// <summary>
/// Converts a MultiPolygon to <MultiPolygon Text> format, then Appends to it to the writer.
/// </summary>
/// <param name="multiPolygon">The MultiPolygon to process.</param>
/// <param name="writer">The output stream to Append to.</param>
private static void AppendMultiPolygonText(MultiPolygon multiPolygon, StringWriter writer)
{
if (multiPolygon == null || multiPolygon.IsEmpty())
writer.Write("EMPTY");
else
{
writer.Write("(");
for (int i = 0; i < multiPolygon.Polygons.Count; i++)
{
if (i > 0)
writer.Write(", ");
AppendPolygonText(multiPolygon[i], writer);
}
writer.Write(")");
}
}
/// <summary>
/// Return a copy of this geometry
/// </summary>
/// <returns>Copy of Geometry</returns>
public new MultiPolygon Clone()
{
var geoms = new MultiPolygon();
foreach (var polygon in Polygons)
{
geoms.Polygons.Add(polygon.Clone());
}
return geoms;
}
