/// <summary>
/// (re)calculates the given GraphicsPath according to the given CapShape.
/// </summary>
/// <param name="capPath">Reference of the GraphicsPath to (re)calculate</param>
/// <param name="capShape">Desired shape of the LineCap</param>
/// <param name="capSize">Desired Size of the LineCap</param>
private static void CalcCapShape(ref GraphicsPath capPath, CapShape capShape, float capSize)
{
Debug.Assert(capSize >= 0);
if (capPath == null)
{
capPath = new GraphicsPath();
}
float halfSize = capSize / 2f;
capPath.Reset();
switch (capShape)
{
case CapShape.ClosedArrow:
capPath.StartFigure();
capPath.AddLine(-halfSize, -capSize, 0, 0);
capPath.AddLine(0, 0, halfSize, -capSize);
capPath.AddLine(halfSize, -capSize, -halfSize, -capSize);
capPath.CloseFigure();
break;
case CapShape.OpenArrow:
float quaterSize = capSize / 4f;
capPath.StartFigure();
capPath.AddLine(-halfSize, -capSize, 0, 0);
capPath.AddLine(0, 0, halfSize, -capSize);
capPath.AddLine(halfSize, -capSize, 0, -quaterSize);
capPath.AddLine(0, -quaterSize, -halfSize, -capSize);
capPath.CloseFigure();
break;
case CapShape.Triangle:
capPath.StartFigure();
capPath.AddLine(0, -capSize, -halfSize, 0);
capPath.AddLine(-halfSize, 0, halfSize, 0);
capPath.AddLine(halfSize, 0, 0, -capSize);
capPath.CloseFigure();
break;
case CapShape.Circle:
capPath.StartFigure();
capPath.AddEllipse(-halfSize, -capSize, capSize, capSize);
capPath.CloseFigure();
break;
case CapShape.Square:
_rectFBuffer.X = -halfSize;
_rectFBuffer.Y = -capSize;
_rectFBuffer.Width = halfSize + halfSize;
_rectFBuffer.Height = capSize;
capPath.StartFigure();
capPath.AddRectangle(_rectFBuffer);
capPath.CloseFigure();
break;
case CapShape.Diamond:
capPath.StartFigure();
capPath.AddLine(0, 0, -halfSize, -halfSize);
capPath.AddLine(-halfSize, -halfSize, 0, -capSize);
capPath.AddLine(0, -capSize, halfSize, -halfSize);
capPath.AddLine(halfSize, -halfSize, 0, 0);
capPath.CloseFigure();
break;
case CapShape.CenteredCircle:
capPath.StartFigure();
capPath.AddEllipse(-halfSize, -halfSize, capSize, capSize);
capPath.CloseFigure();
break;
case CapShape.CenteredHalfCircle:
capPath.StartFigure();
capPath.StartFigure();
capPath.AddArc(-halfSize, -halfSize, capSize, capSize, 0f, -180f);
capPath.AddLine(-halfSize, 0, -halfSize - 1, 0);
capPath.AddArc(-halfSize - 1, -halfSize - 1, capSize + 2, capSize + 2, 180f, 180f);
capPath.AddLine(halfSize + 1, 0, halfSize, 0);
capPath.CloseFigure();
capPath.CloseFigure();
break;
case CapShape.None:
case CapShape.Round:
return;
default: throw new NShapeUnsupportedValueException(capShape);
}
}
/// <summary>
/// (re)calculates the given GraphicsPath according to the given CapShape.
/// </summary>
/// <param name="capPath">Reference of the GraphicsPath to (re)calculate</param>
/// <param name="capShape">Desired shape of the LineCap</param>
/// <param name="capSize">Desired Size of the LineCap</param>
private static void CalcCapShape(ref GraphicsPath capPath, CapShape capShape, int capSize) {
Debug.Assert(capSize >= 0);
if (capPath == null) capPath = new GraphicsPath();
float halfSize = capSize / 2f;
capPath.Reset();
switch (capShape) {
case CapShape.ArrowClosed:
capPath.StartFigure();
capPath.AddLine(-halfSize, -capSize, 0, 0);
capPath.AddLine(0, 0, halfSize, -capSize);
capPath.AddLine(halfSize, -capSize, -halfSize, -capSize);
capPath.CloseFigure();
break;
case CapShape.ArrowOpen:
float quaterSize = capSize / 4f;
capPath.StartFigure();
capPath.AddLine(-halfSize, -capSize, 0, 0);
capPath.AddLine(0, 0, halfSize, -capSize);
capPath.AddLine(halfSize, -capSize, 0, -quaterSize);
capPath.AddLine(0, -quaterSize, -halfSize, -capSize);
capPath.CloseFigure();
break;
case CapShape.Triangle:
capPath.StartFigure();
capPath.AddLine(0, -capSize, -halfSize, 0);
capPath.AddLine(-halfSize, 0, halfSize, 0);
capPath.AddLine(halfSize, 0, 0, -capSize);
capPath.CloseFigure();
break;
case CapShape.Circle:
capPath.StartFigure();
capPath.AddEllipse(-halfSize, -capSize, capSize, capSize);
capPath.CloseFigure();
break;
case CapShape.Square:
rectFBuffer.X = -halfSize;
rectFBuffer.Y = -capSize;
rectFBuffer.Width = halfSize + halfSize;
rectFBuffer.Height = capSize;
capPath.StartFigure();
capPath.AddRectangle(rectFBuffer);
capPath.CloseFigure();
break;
case CapShape.Diamond:
capPath.StartFigure();
capPath.AddLine(0, 0, -halfSize, -halfSize);
capPath.AddLine(-halfSize, -halfSize, 0, -capSize);
capPath.AddLine(0, -capSize, halfSize, -halfSize);
capPath.AddLine(halfSize, -halfSize, 0, 0);
capPath.CloseFigure();
break;
case CapShape.CenteredCircle:
capPath.StartFigure();
capPath.AddEllipse(-halfSize, -halfSize, capSize, capSize);
capPath.CloseFigure();
break;
case CapShape.CenteredHalfCircle:
capPath.StartFigure();
capPath.StartFigure();
capPath.AddArc(-halfSize, -halfSize, capSize, capSize, 0f, -180f);
capPath.AddLine(-halfSize, 0, -halfSize - 1, 0);
capPath.AddArc(-halfSize - 1, -halfSize - 1, capSize + 2, capSize + 2, 180f, 180f);
capPath.AddLine(halfSize + 1, 0, halfSize, 0);
capPath.CloseFigure();
capPath.CloseFigure();
break;
case CapShape.None:
return;
default: throw new NShapeUnsupportedValueException(capShape);
}
}
