private static object CoerceGeometry(DependencyObject d, object baseValue)
{
PortionPath portionPath = (PortionPath)d;
int firstPoint = (int)(portionPath.PointCollection.Length * portionPath.From);
int lastPoint = (int)(portionPath.PointCollection.Length * portionPath.To);
if (firstPoint == 0 && lastPoint == portionPath.PointCollection.Length)
{
return(portionPath.Data);
}
if (firstPoint == lastPoint)
{
return(Geometry.Empty);
}
PathFigure pathFigure = new PathFigure();
var pointCollection = portionPath.PointCollection.Skip(firstPoint).Take(lastPoint - firstPoint).ToArray();
if (pointCollection.Length > 0)
{
pathFigure.StartPoint = pointCollection[0];
if (pointCollection.Length > 1)
{
Point[] array = new Point[pointCollection.Length - 1];
for (int i = 1; i < pointCollection.Length; i++)
{
array[i - 1] = pointCollection[i];
}
pathFigure.Segments.Add(new PolyLineSegment(array, true));
}
}
PathGeometry polylineGeometry = new PathGeometry();
polylineGeometry.Figures.Add(pathFigure);
return(polylineGeometry);
}
private static object CoercePointCollection(DependencyObject d, object baseValue)
{
PortionPath portionPath = (PortionPath)d;
var path = portionPath.Data;
var steps = portionPath.Steps;
var g = path.GetFlattenedPathGeometry(portionPath.Tolerance, ToleranceType.Absolute);
List <Point> pointCollection = new List <Point>();
var step = 1.0 / steps;
for (double i = 0; i <= 1; i += step)
{
g.GetPointAtFractionLength(i, out Point p, out _);
pointCollection.Add(p);
}
return(pointCollection.ToArray());
}
