/// <summary>
/// Constructs a path that represents this pie segment
/// </summary>
/// <returns></returns>
private Path ConstructPath()
{
if (WedgeAngle >= 360)
{
Path path = new Path()
{
Fill = this.Fill,
Stroke = this.Stroke,
StrokeThickness = 1,
Data = new GeometryGroup()
{
FillRule = System.Windows.Media.FillRule.EvenOdd,
Children = new GeometryCollection()
{
new EllipseGeometry()
{
Center = new Point(CentreX, CentreY),
RadiusX = Radius,
RadiusY = Radius
},
new EllipseGeometry()
{
Center = new Point(CentreX, CentreY),
RadiusX = InnerRadius,
RadiusY = InnerRadius
}
},
}
};
return(path);
}
Point startPoint = new Point(CentreX, CentreY);
Point innerArcStartPoint = UtilsHelper.ComputeCartesianCoordinate(RotationAngle, InnerRadius);
innerArcStartPoint.Offset(CentreX, CentreY);
Point innerArcEndPoint = UtilsHelper.ComputeCartesianCoordinate(RotationAngle + WedgeAngle, InnerRadius);
innerArcEndPoint.Offset(CentreX, CentreY);
Point outerArcStartPoint = UtilsHelper.ComputeCartesianCoordinate(RotationAngle, Radius);
outerArcStartPoint.Offset(CentreX, CentreY);
Point outerArcEndPoint = UtilsHelper.ComputeCartesianCoordinate(RotationAngle + WedgeAngle, Radius);
outerArcEndPoint.Offset(CentreX, CentreY);
bool largeArc = WedgeAngle > 180.0;
Size outerArcSize = new Size(Radius, Radius);
Size innerArcSize = new Size(InnerRadius, InnerRadius);
PathFigure figure = new PathFigure()
{
StartPoint = innerArcStartPoint,
Segments = new PathSegmentCollection()
{
new LineSegment()
{
Point = outerArcStartPoint
},
new ArcSegment()
{
Point = outerArcEndPoint,
Size = outerArcSize,
IsLargeArc = largeArc,
SweepDirection = SweepDirection.Clockwise,
RotationAngle = 0
},
new LineSegment()
{
Point = innerArcEndPoint
},
new ArcSegment()
{
Point = innerArcStartPoint,
Size = innerArcSize,
IsLargeArc = largeArc,
SweepDirection = SweepDirection.Counterclockwise,
RotationAngle = 0
}
}
};
return(new Path()
{
Fill = this.Fill,
Stroke = this.Stroke,
StrokeThickness = 1,
Data = new PathGeometry()
{
Figures = new PathFigureCollection()
{
figure
}
}
});
}