protected override Size ArrangeOverride(Size finalSize)
{
var circle = new Circle(finalSize);
circle.Radius -= StrokeThickness / 2;
ArrangeEllipse(circle);
return finalSize;
}
public void SizeTest()
{
// Normal case
var circle = new Circle(new Size(3.0, 2.0));
Assert.AreEqual(new Size(1.0, 1.0), circle.Size());
// Extreme case (Inf)
var infiniteCircle = new Circle(new Size(Double.PositiveInfinity, 0));
Assert.AreEqual(new Size(0, 0), infiniteCircle.Size());
// Extreme case (NaN)
var nanCircle = new Circle(new Size(Double.NaN, 1));
Assert.AreEqual(new Size(Double.NaN, Double.NaN), nanCircle.Size());
}
public void PointAtTest()
{
// Normal cases
var circle = new Circle(new Size(10.0, 2.0))
{
Center = new Point(1, 1)
};
Assert.AreEqual(new Point(1, 0), circle.PointAt(0));
Assert.AreEqual(new Point(0, 1), circle.PointAt(270));
Assert.AreEqual(new Point(2, 1), circle.PointAt(-270));
// Extreme case (Inf)
var infPoint = circle.PointAt(Double.PositiveInfinity);
Assert.AreEqual(Double.NaN, infPoint.X);
Assert.AreEqual(Double.NaN, infPoint.Y);
// Extreme case (NaN)
var nanPoint = circle.PointAt(Double.PositiveInfinity);
Assert.AreEqual(Double.NaN, nanPoint.X);
Assert.AreEqual(Double.NaN, nanPoint.Y);
}
private void ArrangePath(Circle circle)
{
var tension = Tension % 1;
var angle = Angle + Offset;
var startAngle = angle - tension * Spread;
var endAngle = angle + (1 - tension) * Spread;
figure.StartPoint = circle.PointAt(startAngle);
segment.Point = circle.PointAt(endAngle);
segment.Size = circle.Size();
segment.IsLargeArc = (Spread > 180);
}
private void ArrangeEllipse(Circle circle)
{
ellipse.Center = circle.Center;
ellipse.RadiusX = circle.Radius;
ellipse.RadiusY = circle.Radius;
}
private void ArrangePath(Circle circle)
{
arcFigure.StartPoint = circle.Center;
sliceStart.Point = circle.PointAt(Angle + Offset);
sliceEnd.Point = circle.Center;
arcSegment.Point = circle.PointAt(Angle + Offset + Spread);
arcSegment.Size = circle.Size();
arcSegment.IsLargeArc = (Spread > 180);
}
