/// <summary>
/// Constructs a path that represents this pie segment
/// </summary>
/// <returns></returns>
private Path ConstructPath()
{
if (WedgeAngle >= 360)
{
var path = new Path
{
Fill = Fill,
Stroke = Stroke,
StrokeThickness = 1,
Data = new GeometryGroup
{
FillRule = 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);
}
var startPoint = new Point(CentreX, CentreY);
var p1 = AppHelpers.ComputeCartesianCoordinate(RotationAngle, InnerRadius);
p1.Offset(CentreX, CentreY);
var innerArcStartPoint = p1;
var p2 = AppHelpers.ComputeCartesianCoordinate(RotationAngle + WedgeAngle, InnerRadius);
p2.Offset(CentreX, CentreY);
var innerArcEndPoint = p2;
var p3 = AppHelpers.ComputeCartesianCoordinate(RotationAngle, Radius);
p3.Offset(CentreX, CentreY);
var outerArcStartPoint = p3;
var p4 = AppHelpers.ComputeCartesianCoordinate(RotationAngle + WedgeAngle, Radius);
p4.Offset(CentreX, CentreY);
var outerArcEndPoint = p4;
var largeArc = WedgeAngle > 180.0;
var outerArcSize = new Size(Radius, Radius);
var innerArcSize = new Size(InnerRadius, InnerRadius);
var 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 = Fill,
Stroke = Stroke,
StrokeThickness = 1,
Data = new PathGeometry
{
Figures = new PathFigureCollection
{
figure
}
}
});
}
