///<summary>
/// Adds a <see cref="PathFigure"/> representing a polygon ring
/// having the given coordinate sequence to the supplied <see cref="StreamGeometryContext"/>
///</summary>
///<param name="sgc">The stream geometry context.</param>
///<param name="coordinates">A coordinate sequence</param>
///<param name="filled">Starting paramter for </param>
///<returns>The path for the coordinate sequence</returns>
private static void AddRing(StreamGeometryContext sgc, Coordinate[] coordinates, bool filled)
{
if (coordinates.Length <= 0)
return;
sgc.BeginFigure(ToPoint(coordinates[0]), filled, true);
if (coordinates.Length > 0)
sgc.PolyLineTo(ToPoint(coordinates, 1), true, true);
}
/// <summary>
/// SerializeData - Serialize the contents of this Segment to the provided context.
/// </summary>
internal override void SerializeData(StreamGeometryContext ctx)
{
ctx.PolyLineTo(Points, IsStroked, IsSmoothJoin);
}
/// <summary>
/// Private helper to render a path figure to the SGC
/// </summary>
private static void AddArcToFigureToStreamGeometryContext(StreamGeometryContext context, List<Point> abPoints, List<Point> dcPoints, List<Point> polyLinePoints)
{
Debug.Assert(context != null);
Debug.Assert(abPoints != null && dcPoints != null);
Debug.Assert(polyLinePoints != null);
//Debug.Assert(abPoints.Count > 0 && dcPoints.Count > 0);
if (abPoints.Count == 0 || dcPoints.Count == 0)
{
return;
}
context.BeginFigure(abPoints[0], //start point
true, //isFilled
true); //IsClosed
for (int j = 0; j < 2; j++)
{
List<Point> points = j == 0 ? abPoints : dcPoints;
int startIndex = j == 0 ? 1 : 0;
for (int i = startIndex; i < points.Count; )
{
Point next = points[i];
if (next == StrokeRenderer.ArcToMarker)
{
if (polyLinePoints.Count > 0)
{
//polyline first
context.PolyLineTo( polyLinePoints,
true, //isStroked
true); //isSmoothJoin
polyLinePoints.Clear();
}
//we're arcing, pull out height, width and the arc to point
Debug.Assert(i + 2 < points.Count);
if (i + 2 < points.Count)
{
Point sizePoint = points[i + 1];
Size ellipseSize = new Size(sizePoint.X / 2/*width*/, sizePoint.Y / 2/*height*/);
Point arcToPoint = points[i + 2];
bool isLargeArc = false; //>= 180
context.ArcTo( arcToPoint,
ellipseSize,
0d, //rotation
isLargeArc, //isLargeArc
SweepDirection.Clockwise,
true, //isStroked
true); //isSmoothJoin
}
i += 3; //advance past this arcTo block
}
else
{
//walk forward until we find an arc marker or the end
polyLinePoints.Add(next);
i++;
}
}
if (polyLinePoints.Count > 0)
{
//polyline
context.PolyLineTo(polyLinePoints,
true, //isStroked
true); //isSmoothJoin
polyLinePoints.Clear();
}
}
}
/// <summary>
/// Private helper to render a path figure to the SGC
/// </summary>
private static void AddPolylineFigureToStreamGeometryContext(StreamGeometryContext context, List<Point> abPoints, List<Point> dcPoints)
{
Debug.Assert(context != null);
Debug.Assert(abPoints != null && dcPoints != null);
Debug.Assert(abPoints.Count > 0 && dcPoints.Count > 0);
context.BeginFigure(abPoints[0], //start point
true, //isFilled
true); //IsClosed
context.PolyLineTo(abPoints,
true, //isStroked
true); //isSmoothJoin
context.PolyLineTo(dcPoints,
true, //isStroked
true); //isSmoothJoin
}
/// <summary>
/// Private helper to render a path figure to the SGC
/// </summary>
private static void AddFigureToStreamGeometryContext(StreamGeometryContext context, List<Point> points, bool isBezierFigure)
{
Debug.Assert(context != null);
Debug.Assert(points != null);
Debug.Assert(points.Count > 0);
context.BeginFigure(points[points.Count - 1], //start point
true, //isFilled
true); //IsClosed
if (isBezierFigure)
{
context.PolyBezierTo(points,
true, //isStroked
true); //isSmoothJoin
}
else
{
context.PolyLineTo(points,
true, //isStroked
true); //isSmoothJoin
}
}
public static void DrawFigure(StreamGeometryContext ctx, PathFigure figure)
{
ctx.BeginFigure(figure.StartPoint, figure.IsFilled, figure.IsClosed);
foreach (var segment in figure.Segments)
{
var lineSegment = segment as WpfLineSegment;
if (lineSegment != null) { ctx.LineTo(lineSegment.Point, lineSegment.IsStroked, lineSegment.IsSmoothJoin); continue; }
var bezierSegment = segment as BezierSegment;
if (bezierSegment != null) { ctx.BezierTo(bezierSegment.Point1, bezierSegment.Point2, bezierSegment.Point3, bezierSegment.IsStroked, bezierSegment.IsSmoothJoin); continue; }
var quadraticSegment = segment as QuadraticBezierSegment;
if (quadraticSegment != null) { ctx.QuadraticBezierTo(quadraticSegment.Point1, quadraticSegment.Point2, quadraticSegment.IsStroked, quadraticSegment.IsSmoothJoin); continue; }
var polyLineSegment = segment as PolyLineSegment;
if (polyLineSegment != null) { ctx.PolyLineTo(polyLineSegment.Points, polyLineSegment.IsStroked, polyLineSegment.IsSmoothJoin); continue; }
var polyBezierSegment = segment as PolyBezierSegment;
if (polyBezierSegment != null) { ctx.PolyBezierTo(polyBezierSegment.Points, polyBezierSegment.IsStroked, polyBezierSegment.IsSmoothJoin); continue; }
var polyQuadraticSegment = segment as PolyQuadraticBezierSegment;
if (polyQuadraticSegment != null) { ctx.PolyQuadraticBezierTo(polyQuadraticSegment.Points, polyQuadraticSegment.IsStroked, polyQuadraticSegment.IsSmoothJoin); continue; }
var arcSegment = segment as ArcSegment;
if (arcSegment != null) { ctx.ArcTo(arcSegment.Point, arcSegment.Size, arcSegment.RotationAngle, arcSegment.IsLargeArc, arcSegment.SweepDirection, arcSegment.IsStroked, arcSegment.IsSmoothJoin); continue; }
}
}
/// <summary>
/// SerializeData - Serialize the contents of this Segment to the provided context.
/// </summary>
internal override void SerializeData(StreamGeometryContext ctx)
{
ctx.PolyLineTo(Points, IsStroked, IsSmoothJoin);
}
void DrawArrow(StreamGeometryContext gc, Point from, Point to2, double Wings, double offset)
{
Point to = new Point(from.X * (1.0 - offset) + to2.X * offset, from.Y * (1.0 - offset) + to2.Y * offset);
double dx = to2.X - from.X;
double dy = to2.Y - from.Y;
double len = Math.Sqrt(dx * dx + dy * dy);
if (len == 0)
return;
dx = (dx / len) * (Wings);
dy = (dy / len) * (Wings);
Point A = new Point(to.X - dx, to.Y - dy);
var pts0 = new Point(to.X, to.Y);
dx /= 2;
dy /= 2;
var pts1 = new Point(A.X - dy, A.Y + dx);
var pts2 = new Point(A.X + dx / 2, A.Y + dy / 2);
var pts3 = new Point(A.X + dy, A.Y - dx);
gc.BeginFigure(pts0, true, true);
gc.PolyLineTo(new Point[] { pts1, pts2, pts3 }, true, true);
}
private void DrawCustomShape(StreamGeometryContext context)
{
context.BeginFigure(this.DiagramPoints[0], true, false);
context.PolyLineTo(this.DiagramPoints, true, true);
}
private void InternalDrawArrowGeometry(StreamGeometryContext context)
{
Point pt1 = new Point(X1, this.Y1);
Point pt2 = new Point(X2, this.Y2);
var lastPt = pt1;
context.BeginFigure(pt1, false, false);
if (Points != null)
{
foreach (var point in Points)
{
context.LineTo(point, true, true);
}
//The Previous Point (before the Endpoint) should be used for Angle Caluculation!
if (Points.Count > 1)
lastPt = Points[Points.Count - 2];
}
context.LineTo(pt2, true, true);
double theta = Math.Atan2(lastPt.Y - Y2, lastPt.X - X2);
double sint = Math.Sin(theta);
double cost = Math.Cos(theta);
Point pt3 = new Point(
X2 + (HeadWidth * cost - HeadHeight * sint),
Y2 + (HeadWidth * sint + HeadHeight * cost));
Point pt4 = new Point(
X2 + (HeadWidth * cost + HeadHeight * sint),
Y2 - (HeadHeight * cost - HeadWidth * sint));
context.BeginFigure(pt2, true, false);
context.PolyLineTo(new[] {pt3, pt4, pt2}, true, true);
}