Hello Christoph,

I have done some more investigation into the ImmediateLineSeries in this case, and at the moment I am unsure why this is happening with the “Load Crank 1 Data” checkbox, but I can say it is due to the Resolution of the series in the case of the “Load Crank 2 Data” one. In the MainWindow.xaml.cs file, if you set the Resolution property of the ImmediateLineSeries to something very small – for example .001 – it will render a more representative shape for the series.

I believe the reason this is working is because the X-Values are different for each point, whereas with the “Crank 1 Data” there are two Y-Values per X-Value, and so something about the way that the ImmediateLineSeries might be only taking a single point in the actual rendering and so it is effectively simplifying the line. I can also confirm that this is specifically an issue with the ImmediateLineSeries, as if I switch to using a ScatterLineSeries (built-in) in the MainWindow.xaml.cs, it renders correctly, but the performance is not great as per the rendering issues mentioned in a previous post. The single point bit is only a guess, though, as the amount of experience you have had with the custom ImmediateLineSeries essentially matches mine. This series is not a part of the actual Infragistics WPF toolset, and if bugs or issues are found with it, it is not maintained or supported.

Please let me know if you have any other questions or concerns on this matter.

Hello Andrew!

In the meantime it is running in the Demo project. I started to change my main project and made following changes:

I added classes ImmediateLineSeries, ImmediateLineSeriesBaseView, ImmediateLineSeriesWBXView from the demo project to my main project

I added WriteableBitmapEx via NuGet

Replaced ScatterLineSeries

ScatterLineSeries series = new ScatterLineSeries();

series.XMemberPath = nameof(DataPoint.X);

series.YMemberPath = nameof(DataPoint.Y);

series.MarkerType = MarkerType.None;

series.SetBinding(ScatterLineSeries.XAxisProperty, new Binding { Source = chart.Axes[0] });

series.SetBinding(ScatterLineSeries.YAxisProperty, new Binding { Source = chart.Axes[1] });

series.SetBinding(ScatterLineSeries.DataContextProperty, new Binding { Source = sig });

series.SetBinding(ScatterLineSeries.ItemsSourceProperty, new Binding { Path = new PropertyPath(nameof(sig.Points)) });

series.SetBinding(ScatterLineSeries.TitleProperty, new Binding { Source = sig, Path = new PropertyPath(nameof(sig.SignalName)) });

with ImmediateLineSeries

ImmediateLineSeries.ImmediateLineSeries series = new ImmediateLineSeries.ImmediateLineSeries();

series.Thickness = 1;

series.Resolution = 0.001;

series.UseHairline = true;

series.UpscaleOPD = true;

series.XMemberPath = nameof(DataPoint.X);

series.YMemberPath = nameof(DataPoint.Y);

series.SetBinding(ImmediateLineSeries.ImmediateLineSeries.XAxisProperty, new Binding { Source = chart.Axes[0] });

series.SetBinding(ImmediateLineSeries.ImmediateLineSeries.YAxisProperty, new Binding { Source = chart.Axes[1] });

series.SetBinding(ImmediateLineSeries.ImmediateLineSeries.DataContextProperty, new Binding { Source = sig });

series.SetBinding(ImmediateLineSeries.ImmediateLineSeries.ItemsSourceProperty, new Binding { Path = new PropertyPath(nameof(sig.Points)) });

series.SetBinding(ImmediateLineSeries.ImmediateLineSeries.TitleProperty, new Binding { Source = sig, Path = new PropertyPath(nameof(sig.SignalName)) });

No further code changes.

X-Axis (chart.Axes[0]) and Y-AXis (chart.Axes[1]) are defined in XAML

<ig:XamDataChart.Axes>

   <ig:NumericXAxis x:Name="xAxis"/>

   <ig:NumericYAxis x:Name="yAxis"/>

</ig:XamDataChart.Axes>

sig is an instance of Signal with properties SignalName and Points.

Points is of type ObservableCollection<DataPoint>

DataPoint has two properties: X and Y

When I run my application an System.OverflowException is thrown in ImmediateLineSeriesWBXView.OnResize

public override void OnResize(double width, double height)
 

due to width and height being -Inifity.

This method is called by ImmediateLineSeriesWBXView.PrepSurface when querying the Viewport for Thumbnail

 
 if (IsThumbnail && OrderedScatterModel.UpscaleOPD)
 {
     Rect windowRect;
     Rect viewportRect;
     MainView.GetViewInfo(out viewportRect, out windowRect);

     Viewport = viewportRect;
 }

I receive Viewport == Empty (empty size and all properties being equal to +/- infinite).

ImmediateLineSeriesWBXView.PrepSurface is called in ImmediateLineSeries.RenderThumbnail

ThumbView.PrepSurface(surface);

Any idea what can be the reason for that?! 

Due to the nature that ImmediateLineSeries is not supported nor maintained, maybe it's will be the wrong way to go?!

It will be impossible to send my project, at least not on the forum. It contains a lot of references to other projects, too. So I will have to "clean up".

BR, Christoph

Hello Christoph,

I am not certain, but it is possible that this error could potentially be caused by a missing default style for the ImmediateLineSeries. Did you include the Themes folder from the sample project I sent you so that the ImmediateLineSeries has a template? I am seeing a similar error in the sample project if I remove that folder.

I cannot really say if usage of the ImmediateLineSeries is really the “wrong” way to go, but with the current implementation of the series that are supported, the highly fluctuating path type will cause performance issues with essentially any line-type series. This is a current limitation of the XamDataChart imposed by WPF, and the ImmediateLineSeries was created as a “non-official workaround” in this case.

Please let me know if you have any other questions or concerns on this matter.

Hi!

I included the Themes folder with the Generic.xaml into my solution.

Still the same exception.

Is it possible to send you my project (not inthe forum)?

BR, Christoph

In fact, I don't know what I am missing, or what I did wrong.

BR, Christoph

Thank you very much.

From my point of view I am ´happy.

BR, Christoph