topic Re: Getting nearest plot in Measurement Studio for .NET Languages

Getting nearest plot

Sof — Mon, 20 Mar 2006 21:14:37 GMT

I have multiple plots on a scattergraph. The user wants to click on one of those plots and have the cursor be assigned to that plot.

Is there a way to do this? I can't find anything that will work.

VS2005

NI 7.1

thanks,

Scott

Re: Getting nearest plot

Elton Wells — Tue, 21 Mar 2006 03:09:27 GMT

The graphs have a GetPlotAt method that will return a reference to the plot if there is a plot point at the specified coordinates. You could use this method in a mouse event handler, check to see if there is a plot at the specified coordinates, and if so, associate the plot with the cursor. For example:

private void OnPlotAreaMouseDown(object sender, MouseEventArgs e)
{
    XYPlot plot = graph.GetPlotAt(e.X, e.Y);
    if (plot != null)
        xyCursor1.Plot = plot;
}

- Elton

Re: Getting nearest plot

Sof — Tue, 21 Mar 2006 16:21:12 GMT

Thanks Elton. That will work fine. I was hoping there was a "get nearest plot" type of thing. But we will just have to make the user click on the plot.

Thanks again,

Scott

Re: Getting nearest plot

Elton Wells — Tue, 21 Mar 2006 16:29:26 GMT

Another thing you could consider doing is adding a legend for the plots and then let users associate the cursor with the plots via the legend items, via clicking on the legend item for the plot, a context menu on the legend, etc.

- Elton

Re: Getting nearest plot

Sof — Tue, 21 Mar 2006 16:50:25 GMT

Yes. That was in fact one of the ways I had suggested. They want the "click on plot" method also, however, because that is what their previous Motif program gave them. I will also give them the up down arrow keys to cycle through plots.

Scott