WPF CustomFormatter and mulitplot curser

[rizardus]

In my application I use a WPF Graph showing data with a relative time format. The data shown on the X Axis is formattet like this.

public sealed class RelativeTimeFormatter : GeneralValueFormatter
    {
        public PrecisionDateTime? ZeroValue { get; set;  }

        protected override string FormatCore<TData>( TData value, ValuePresenterArgs args)
        {
            var time = value as PrecisionDateTime?;
            if (!time.HasValue)
            {
                return base.FormatCore(value, args);
            }

            // Get the first time value specified for all waveforms
            // or retrieve the last start value observed by the graph.
            var zeroValue = ZeroValue ?? (PrecisionDateTime)args.Data["Zero Value"];

            // Determine the time from Zero.
            PrecisionTimeSpan difference = time.Value - zeroValue;

            // Format result.
            //string result = difference.ToString(Format ?? @"hh\:mm\:ss\.ffff");
            string result = difference.ToString(Format ?? @"mm\:ss\.ffff");
            return result;
        }
    }

I can use this for the range curser and also the single plot curser without any problems. I am creating the cursers in Code behind and not XAML.

ValueFormatterGroup myFormatterGroup = new ValueFormatterGroup();
myFormatterGroup.Separator = " ; ";		// Seperator
myFormatterGroup.DefaultFormatter = new GeneralValueFormatter("0.00"); // Formatter Y-Axis
myFormatterGroup.ValueFormatters.Add(new RelativeTimeFormatter());		// Formatter X-Axis?

// Adding the formatter group to my curser and to the graph.
NationalInstruments.Controls.Cursor myCurser = new NationalInstruments.Controls.Cursor();
myCurser.ValuePresenter = myFormatterGroup;
graph1.Children.Add(myCurser);

I cant get it to work for the multi curser. I tried a few variations but i have no clue how i can format the Y-Values correctly. I tested it in a graph with two plots. The curser shows the X-Values correctly but the Y-Values also get formattet. I want to show them as double.

Right now it looks like this:

As you can see the values behind the ; are formattet very strangly.

I hope someone can help me with this.

Greetings

Marius

[phansen]

From the screenshot, it appears that the sample values are being formatted as date values?

Unfortunately, I could not reproduce the issue locally. It would be helpful to know what type of data your are sending to the graph. I have attached the test project I used, which supplies the graph with analog waveform data, and displays the samples numerically.

[rizardus]

Thank you for taking the time. I am really sorry but I made a mistake while copy and pasting my source code. The normal curser works fine. The problem ist the multiplot cursor. Here is the code i used:

ValueFormatterGroup myFormatterGroup = new ValueFormatterGroup();
myFormatterGroup.Separator = " ; ";
myFormatterGroup.DefaultFormatter = new GeneralValueFormatter("0.00");
myFormatterGroup.ValueFormatters.Add(new RelativeTimeFormatter());

MultiPlotCursor myCurser = new MultiPlotCursor(); // <----- MultiPlotCursor
myCurser.ValuePresenter = myFormatterGroup;
graph1.Children.Add(myCurser);

I am using normal AnalogWaveforms<double>[]. The only thing that is custom and not implemented like in the doku examples is the custom time formatter.

X-Axis should be relative time while the Y-Axis just shows Double Values.

[phansen · Accepted solution]

(Ah, wish I had caught that by adding more plot data in the first place!)

I updated my test project to use a multi-plot cursor and multiple plots (updated file attached). However, this displays correctly for me:

Perhaps you have a different version of Measurement Studio? I am using 2019.