/// <summary>
/// Finds the point nearest to a specified point on a screen.
/// </summary>
/// <param name="screenPoint">The point to search nearest for.</param>
/// <param name="nearest">The out parameter to handle the founded point.</param>
/// <param name="vd">The out parameter to handle data of founded point.</param>
/// <returns>Boolen value indicating whether the nearest point was found or not.</returns>
public bool GetNearestPointAndValue(Point screenPoint, out Point nearest, out double vd)
{
nearest = new Point(Double.NaN, Double.NaN);
vd = Double.NaN;
if (data == null || xArr == null || yArr == null)
{
return(false);
}
Point dataPoint = new Point(XDataTransform.PlotToData(XFromLeft(screenPoint.X)), YDataTransform.PlotToData(YFromTop(screenPoint.Y)));//PlotContext.ScreenToData(screenPoint);
int i = ArrayExtensions.GetNearestIndex(xArr, dataPoint.X);
if (i < 0)
{
return(false);
}
int j = ArrayExtensions.GetNearestIndex(yArr, dataPoint.Y);
if (j < 0)
{
return(false);
}
if (IsBitmap)
{
if (i > 0 && xArr[i - 1] > dataPoint.X)
{
i--;
}
if (j > 0 && yArr[j - 1] > dataPoint.Y)
{
j--;
}
}
if (i < data.GetLength(0) && j < data.GetLength(1))
{
vd = data[i, j];
nearest = new Point(xArr[i], yArr[j]);
return(true);
}
else
{
return(false);
}
}
/// <summary>
/// Finds the point nearest to a specified point on a screen.
/// </summary>
/// <param name="screenPoint">The point to search nearest for.</param>
/// <param name="nearest">The out parameter to handle the founded point.</param>
/// <param name="vd">The out parameter to handle data of founded point.</param>
/// <returns>Boolen value indicating whether the nearest point was found or not.</returns>
public bool GetNearestPointAndValue(Point screenPoint, out Point nearest, out double vd)
{
nearest = new Point(Double.NaN, Double.NaN);
vd = Double.NaN;
if (DataContainer == null || XArray == null || YArray == null)
{
return(false);
}
Point dataPoint = new Point(XDataTransform.PlotToData(XFromLeft(screenPoint.X)), YDataTransform.PlotToData(YFromTop(screenPoint.Y)));
int i = ArrayExtensions.GetNearestIndex(XArray, dataPoint.X);
if (i < 0)
{
return(false);
}
int j = ArrayExtensions.GetNearestIndex(YArray, dataPoint.Y);
if (j < 0)
{
return(false);
}
if (IsBitmap)
{
if (i > 0 && XArray[i - 1] > dataPoint.X)
{
i--;
}
if (j > 0 && YArray[j - 1] > dataPoint.Y)
{
j--;
}
}
if (i < DataContainer.GetLength(0) && j < DataContainer.GetLength(1))
{
vd = DataContainer[i, j];
nearest = new Point(XArray[i], YArray[j]);
return(true);
}
else
{
return(false);
}
}
