private void UpdatePoint(Point mousePoint)
{
// On Mouse-move, update the latest point
if (_dataSeries != null)
{
_dataSeries.XValues[_dataSeries.Count - 1] = (DateTime)XAxis.GetDataValue(mousePoint.X);
_dataSeries.YValues[_dataSeries.Count - 1] = (double)YAxis.GetDataValue(mousePoint.Y);
_dataSeries.InvalidateParentSurface(RangeMode.None);
}
}
private void AppendPoint(Point mousePoint)
{
// On Mouse-down, append another point
if (_dataSeries != null)
{
_dataSeries.Append(
(DateTime)XAxis.GetDataValue(mousePoint.X),
(double)YAxis.GetDataValue(mousePoint.Y));
}
}
/// <summary>
/// Called internally to marshal pixel points to X1,Y1,X2,Y2 values.
/// Taking a pixel point (<paramref name="newPoint"/>) and base point <paramref name="index"/>, sets the X,Y data-values.
/// </summary>
/// <param name="newPoint">The pixel point</param>
/// <param name="index">The base point index, where 0, 1, 2, 3 refer to the four corners of an Annotation</param>
/// <param name="yAxis">The current Y-Axis</param>
/// <param name="xAxis">The current X-Axis </param>
protected override void SetBasePoint(Point newPoint, int index, IAxis xAxis, IAxis yAxis)
{
var xValue = XAxis.GetDataValue(newPoint.X);
var yValue = YAxis.GetDataValue(newPoint.Y);
var lineAnnotations = Annotations;
if (index == 0)
{
lineAnnotations[0].X1 = xValue;
lineAnnotations[0].Y1 = yValue;
lineAnnotations[3].X2 = xValue;
lineAnnotations[3].Y2 = yValue;
}
else if (index == 1)
{
lineAnnotations[1].X1 = xValue;
lineAnnotations[1].Y1 = yValue;
lineAnnotations[0].X2 = xValue;
lineAnnotations[0].Y2 = yValue;
}
else if (index == 2)
{
lineAnnotations[2].X1 = xValue;
lineAnnotations[2].Y1 = yValue;
lineAnnotations[1].X2 = xValue;
lineAnnotations[1].Y2 = yValue;
}
else
{
lineAnnotations[3].X1 = xValue;
lineAnnotations[3].Y1 = yValue;
lineAnnotations[2].X2 = xValue;
lineAnnotations[2].Y2 = yValue;
}
}
