/// <summary>
/// Initializes an instance of this class.
/// </summary>
/// <param name="referencePoint">
/// The reference point. The X and Y values refer to the units used for the vertices.
/// </param>
/// <param name="referencePointPosition">
/// The position of the reference point on the scope display.
/// The X and Y values refer to the screen graticule.
/// </param>
/// <param name="vertices">The vertices describing the graph.</param>
/// <param name="xScaleFactor">The scaling factor for the horizontal (X) direction.</param>
/// <param name="yScaleFactor">The scaling factor for the vertical (Y) direction.</param>
/// <param name="graphType">The graph line type.</param>
/// <param name="color">The graph color.</param>
public ScopeGraph(PointD referencePoint, PointD referencePointPosition, IEnumerable <PointD> vertices,
double xScaleFactor, double yScaleFactor, ScopeLineType lineType, Color color)
{
ReferencePoint = referencePoint;
ReferencePointPosition = referencePointPosition;
Vertices = vertices;
XScaleFactor = xScaleFactor;
YScaleFactor = yScaleFactor;
LineType = lineType;
Color = color;
}
/// <summary>
/// Draws a scope graph.
/// </summary>
private void DrawGraph(RectangleRange rectangleRange, ScopeGraph graph,
ScopeLineType lineType, double lineWidth)
{
var userToDeviceMatrix = rectangleRange.Matrix;
var vertices = graph.Vertices ?? new PointD[0];
var referencePoint = graph.ReferencePoint;
var referencePointPosition = graph.ReferencePointPosition;
var xScaleFactor = graph.XScaleFactor;
var yScaleFactor = graph.YScaleFactor;
var color = graph.Color;
if (vertices.Any())
{
using (CreateContextState())
{
Context.SetSourceColor(color);
// Create a new transformation matrix considering scale factors
// and reference point position.
var vertexMatrix = (Matrix)userToDeviceMatrix.Clone();
vertexMatrix.Translate(referencePointPosition.X, referencePointPosition.Y);
vertexMatrix.Scale(xScaleFactor, yScaleFactor);
vertexMatrix.Translate(-referencePoint.X, -referencePoint.Y);
using (CreateContextState(vertexMatrix))
{
Context.MoveTo(vertices.First());
foreach (var vertex in vertices)
{
if (lineType == ScopeLineType.Dots)
{
Context.MoveTo(vertex);
}
Context.LineTo(vertex);
}
}
Context.LineWidth = lineWidth;
if (lineType == ScopeLineType.Dots)
{
Context.LineCap = LineCap.Round;
}
Context.Stroke();
}
}
}
