how to fill the plot area partially in fill mode

[ucla matt]

I am able to run your example. it is working.

Just need this feature to display / hide(remove) the filled area for particular plot.

Just like NI normal fillmode feature to show:

      waveformPlot1.FillMode = PlotFillMode.Fill;

and hide specific filled area:

      waveformPlot1.FillMode = PlotFillMode.None;

I have tried to clear the array points and refresh the plot, but it doen't work.

Array.Clear(points, 0, points.Length);
waveformPlot1.Invalidate();

[ucla matt]

It is working using this way(find the biggest Y value of data  and set limitingValue equal to biggest Y value, refresh the Graphic:

private void clearFillArea_Click(object sender, EventArgs e)
 {
            double dblYbiggest = findBiggestValue4Array(data);
            limitingValue = dblYbiggest;
            waveformGraph1.Invalidate();

}

private double findBiggestValue4Array(double[] data)

{
            double dblValue = 0.0;
            for (int i = 0; i < data.Length; i++)
            {
                double dblTemp = data[i];
                if (dblTemp > dblValue)
                    dblValue = dblTemp;

            }

            return dblValue;
}

[Snowman 6008]

In the BeforeDraw function you will need to set a global flag that toggles on and off the fill so

      if (true) {
            PointF[] points = waveformPlot1.MapDataPoints(waveformGraph1.PlotAreaBounds, e.Plot.GetXData(), e.Plot.GetYData());
            PointF point = waveformPlot1.MapDataPoint(waveformGraph1.PlotAreaBounds, 0, limitingValue);


            FillDataAboveValue(points, point, e.Graphics);
       }

will enable the fill

      if (false) {
            PointF[] points = waveformPlot1.MapDataPoints(waveformGraph1.PlotAreaBounds, e.Plot.GetXData(), e.Plot.GetYData());
            PointF point = waveformPlot1.MapDataPoint(waveformGraph1.PlotAreaBounds, 0, limitingValue);


            FillDataAboveValue(points, point, e.Graphics);
       }  

will disable the fill