Hi there,
You can use the XYCursor.XPosition to move the cursor.
The cursors always point to a data point on the plot area in the SnapMode.ToPlot.
Use the XYCursor.XPosition to fix the cursor at a know location (lets say at 5 on the x-axis) on the x-axis. But if the data that you plotted does not have a value (i.e. the xData that is being plotted does not have the value 5) then the cursor would try to snap itself to the plot and hence it would not stay at the specified value (i.e. 5).
Here is what I would do
//Here the SnapMode is ToPlot.
double myPosition = 5; //initial default position
private void PlotMayData(object sender, EventArgs e)
{
// Get the data
double[] xData = GetXData();
double[] yData = GetYData();
// Plot the data
scatterGraph1.PlotXY(xData, yData);
// Set same x-position for our cursor,
// so that it does not move back and forth while plotting.
xyCursor1.XPosition = myPosition;
}
private void xyCursor1_AfterMove(object sender, AfterMoveXYCursorEventArgs e)
{
if (e.Action == NationalInstruments.UI.Action.ByMouse)
{
// Whenever the user moves the cursor with mouse,
// change 'myPosition' variable.
myPosition = xyCursor1.XPosition;
}
}
However, if I use WaveformGraph to plot the data in the above code and set the cursor position (to 5). The cursor always stays at my value of interest (i.e. 5) on the x-axis. I do not need to worry about what data I am plotting.
Hope this helps.
If you wanted something else, please attach a sample code so that we could help you effectively.
Vijet Patankar
National Instruments.
