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0 votes
144 views

I am trying to bind from my ViewModel to the DataSeries of a ScatterRenderableSeries3D, but no data is showing.

I am binding in this way:

My ViewModel has a property of type ObservableCollection<XyzDataSeries3D<DateTime, double, int>>. I can populate ChartItems, and see the data in it. The property is being notified of change as expected.

If I populate the DataSeries directly from code behind, it works, but not when being bound.

What am I doing wrong?

0 votes
361 views

I’m trying to implement custom annotations using the MVVM pattern. I’ve been using your tutorial as an example (https://www.scichart.com/databinding-annotations-with-mvvm/). Everything works as expected if I manually load some example data to the annotations collection. When I actually try to load the data from our database using async method, the annotations are no longer drawn.

Is this by design or am I doing something wrong? Do you have any suggestions how to load annotations when using async code and MVVM patterns? I haven’t had any problems loading the actual time series on the chart using the same pattern.

I also tried binding the SciChartSurface’s Annotations property to AnnotationCollection and then calling ChartAnnotations.ParentSurface.InvalidateElement(), but the issue still persists.

You can easily reproduce this behavior by adding an async call to the examples’s source code:

private async Task Initialize()
{
    var ds0 = new XyDataSeries<double, double>();
    var someData = new RandomWalkGenerator().GetRandomWalkSeries(200); // RandomWalkGenerator is found in the examples source code

    ds0.Append(someData.XData, someData.YData);

    _chartSeries = new ObservableCollection<IChartSeriesViewModel>();
    _chartSeries.Add(new ChartSeriesViewModel(ds0, new FastLineRenderableSeries()));

    // Now create the labels
    _chartLabels = new List<LabelViewModel>
                       {
                           new LabelViewModel(5, -2.5, "Label0", "Label0 Tooltip!"),
                           new LabelViewModel(20, -2, "Label1", "Label1 Tooltip!"),
                           new LabelViewModel(35, 3, "Label2", "Label2 Tooltip!"),
                           new LabelViewModel(50, 1.5, "Label3", "Label3 Tooltip!"),
                       };

    await Test();

    _chartLabels.Add(new LabelViewModel(65, -0.5, "AFTER ASYNC", "Label4 Tooltip!"));
}

private async Task Test()
{
    await Task.Delay(5000);
}
  • Juho asked 7 months ago
  • last active 7 months ago
0 votes
400 views

When I select a series/plot, I would like to identify where it came with more than just the Name member. How can I do that?

Background:
I have a list of unsigned integer values taken from a data logger. I bundle the values up in a class with some other information, such as the name of the sample and an ID string.

Since I can’t data bind to the logged samples as-is, I convert them to a SciChart friendly “LineRenderableSeriesViewModel” and add them to a list of “ObservableCollection” that I data bind to a SciChart.

ViewModel.cs:

// Where "loggedSamples" is a SamplesContainer 
//class SamplesContainer
//{
//    public string Name;
//    public string ID;  **<=== I want to get this somehow when I select something**
//    public Uint16 data {get;set;}
//}

// Convert Samples => XyDataSeries => LineRenderableSeriesViewModel

SamplesContainer loggedSamples = GetLoggedSample();
XyDataSeries<double, double> xySeries = ConvertSamplesToXyDataSeries(loggedSamples);
xySeries.SeriesName = loggedSamples.Name;

LineRenderableSeriesViewModel lineSeries = new LineRenderableSeriesViewModel() {
    DataSeries = xySeries, StyleKey = "LineStyle", Stroke = Colors.Blue };

RenderableSeriesViewModelForChannels.Add(lineSeries);

MainWindow.xaml:

   <s:SciChartSurface Name="sciChartItemView" Grid.Column="2"
    AllowDrop="True"
    DragDrop.Drop="sciChartItemView_Drop"
    DragDrop.DragEnter="sciChartItemView_DragEnter"
    MinHeight="80"
    s:ThemeManager.Theme="BrightSpark"  
    RenderableSeries="{s:SeriesBinding RenderableSeriesViewModelForChannels}"
    ViewportManager="{Binding SampleSetViewMod.ViewportManager}"                                                                           
    DebugWhyDoesntSciChartRender="True"
    s:SciChartGroup.VerticalChartGroup="sharedYAxisWidth"
    >

    <s:SciChartSurface.XAxis>
        <s:NumericAxis   
        DrawMajorGridLines="True"
        DrawMinorGridLines="False"
        DrawMajorBands="False"  
        VisibleRange="{Binding SampleSetViewMod.SharedXVisibleRange, Mode=TwoWay}"
        Visibility="Hidden" 
        TextFormatting="0.######"/>
    </s:SciChartSurface.XAxis>

    <s:SciChartSurface.YAxis>
        <s:NumericAxis AxisAlignment="Left"
        DrawMajorGridLines="False"
        DrawMinorGridLines="False"
        DrawMajorBands="False"
        Visibility="Visible">
            <s:NumericAxis.GrowBy>
                <s:DoubleRange Min="0.1" Max="0.1" />
            </s:NumericAxis.GrowBy>
        </s:NumericAxis>

    </s:SciChartSurface.YAxis>

    <s:SciChartSurface.ChartModifier>
        <s:ModifierGroup>
            <s:ZoomExtentsModifier XyDirection="YDirection"/>

            <s:ZoomPanModifier ExecuteOn="MouseMiddleButton" XyDirection="XYDirection" ClipModeX="ClipAtExtents" />

            <local:ExtendedMouseWheelZoomModifier />

            <s:RubberBandXyZoomModifier IsEnabled="True"
                IsXAxisOnly="False"
                ReceiveHandledEvents="True" />
            <s:LegendModifier ShowLegend="True" Orientation="Vertical" Margin="10"
                GetLegendDataFor="AllSeries"
                ShowVisibilityCheckboxes="False" 
                HorizontalAlignment="Right"
                LegendPlacement="Inside"
                Background="White"
                />

            <local:ExtendedSeriesSelectionModifier SelectionChanged="SeriesSelectionModifier_OnSelectionChanged">
                <local:ExtendedSeriesSelectionModifier.SelectedSeriesStyle>
                    <Style TargetType="s:FastLineRenderableSeriesForMvvm">
                        <Setter Property="StrokeDashArray" Value="10,5"/>
                    </Style>
                </local:ExtendedSeriesSelectionModifier.SelectedSeriesStyle>
            </local:ExtendedSeriesSelectionModifier>


            <!--<s:CursorModifier x:Name="cursorModifier" IsEnabled="True" />
        <s:RolloverModifier x:Name="rolloverModifier" IsEnabled="True"/>-->
        </s:ModifierGroup>
    </s:SciChartSurface.ChartModifier>
</s:SciChartSurface>
0 votes
393 views

Hi,
I’m prototyping an application with two visible data series and an individual Y-axis for each data series. See the enclosed image.
The Stroke color of each data series, the TickTextBrush and the BorderBrush of the y-axis are updated by normal data Binding through the MVVM pattern.
The problem is that I am not able to data bind the Stroke property of the MajorTickLineStyle for the individual Y-axis.
Do You know if there is a workaround for this through data binding?
The project is enclosed.

  • andreasrep asked 10 months ago
  • last active 10 months ago
0 votes
589 views

There doesn’t seem to be a corresponding IRenderableSeries3DViewModel object like there is in the 2D charts. What am i suppose to bind to the RenderableSeries property of the SciChart3DSurface? If I bind to a

ObservableCollection<IRenderableSeriesViewModel>

object, then I don’t see a corresponding SurfaceMeshRenderableSeries3DViewModel object similar to LineRenderableSeriesViewModel for 2D?

A simple example of series binding using 3D charts would be great!

  • Andy None asked 11 months ago
  • last active 11 months ago
0 votes
517 views

Hi there,

I am relatively new to C# and scicharts so you will have to forgive me a little.

In the project I am working on, I am trying to add dynamic renderable series as the user selects items in a tree. I have looked through the online tutorials and forums but still am having trouble. I am creating my own renderable series view model class derived off of LineRenderableSeriesViewModel. I found documentation that I needed to override the ViewType property and set it to a FastLineRenderableSeriesForMvvm.

When I am creating these objects to add to the ObservableCollection which is bound to my scichart surface, I can set the PointMarker and its properties, but not the SelectedPointMarker properties.

XAML:

    <s:SciChartSurface Style="{StaticResource BasicSciChartSurfaceStyleRateVsTime}"
                       ViewportManager="{Binding RateVsTimePlot.Manipulator.Viewport}"
                       Name="RateVsTime" x:FieldModifier="private"
                       ZoomHistoryManager="{Binding RateVsTimePlot.ZoomHistory}"
                       PreviewMouseLeftButtonDown="PreviewRateVsTimeMouseLeftButtonDown"
                       PreviewMouseLeftButtonUp="PreviewRateVsTimeMouseLeftButtonUp"
                       RenderableSeries="{s:SeriesBinding RateVsTimePlot.RenderableSeriesViewModels}"
                       local:YAxesCollectionBehaviour.AxisSource="{Binding RateVsTimePlot.YAxesViewModels}"
                       local:YAxesCollectionBehaviour.AxisStyle="{StaticResource AxisStyle}"/>         

Style:

<Style x:Key="ProdLineStyle" TargetType="s:FastLineRenderableSeriesForMvvm">
    <Setter Property="s:TooltipModifier.IncludeSeries" Value="False"/>
    <Setter Property="SelectedPointMarker">
        <Setter.Value>
            <s:EllipsePointMarker Fill="{Binding SeriesColors.ProductionColor}"
                                  Stroke="{Binding SeriesColors.ProductionColor}"
                                  Width="6" Height="6">
            </s:EllipsePointMarker>
        </Setter.Value>
     </Setter>
</Style>

ViewModel :

        var renderableSeries = new GenericRenderableSeriesViewModel
        {
            DataSeries = dataSeries.DataSeries,
            YAxisId = dataSeries.AxisId,
            IsSelected = IsSelected,
            SeriesColors = _dataColors[fluidRateType],
            DisplayEnabled = AnalysisInteractionMode.IsLineManipulationDisabled,
            PointMarker = new EllipsePointMarker(),
            StyleKey = "ProdLineStyle"
        };

        renderableSeries.SetRenderableSeriesColorSettings();

        renderableSeries.DataSeries.SeriesName = fluidRateType.ToString();
        return renderableSeries;

public void SetRenderableSeriesColorSettings()
    {
        Stroke = SeriesColors.ProductionColor;

        if (PointMarker == null) return;

        PointMarker.Stroke = SeriesColors.ProductionColor;
        PointMarker.Fill = SeriesColors.ProductionColor;
        PointMarker.Height = PointNonSelectedHeight;
        PointMarker.Width = PointNonSelectedWidth;
    }

When I run my app, I see what I am expecting by default, but when I do a point selection rectangle, the behavior is not correct. I only see the line. The points with in the rectangle disappear.

I am trying to move away from having the style set the selectedPointMarker, and doing it through code in the view model just like the function above as users will be able to change these properties in the future. But so far I haven’t found a way to do either.

Am I using the correct classes, or do I need to override something else? Any ideas or suggestions would be greatly appreciated

Thanks
Rylan

1 vote
884 views

I’m trying to create a CustomRenderableSeries in MVVM. I’ve got my custom renderable series working fine outside of MVVM, and it seems pretty simple to wrap it with a ViewModel using the API.

However, the series isn’t displaying (Draw not getting called, and ranges not changing, so it’s not just failing to draw anything).

It’s pretty simple (and I’m going to add caching for the pens and brushes later):

public class CustomXyScatterRenderableSeriesViewModel : BaseRenderableSeriesViewModel
{
    // Tell SciChart what type of RenderableSeries you want to instantiate
    public override Type RenderSeriesType
    {
        get { return typeof(CustomXyScatterRenderableSeries); }
    }
}


public sealed class CustomXyScatterRenderableSeries : CustomRenderableSeries
{
    protected override void Draw(IRenderContext2D renderContext, IRenderPassData renderPassData)
    {
        XyzPointSeries pointSeries = renderPassData.PointSeries as XyzPointSeries;

        // PointMarkers are created once and cached
        var pointMarker = this.GetPointMarker();

        //if (pointMarker == null)
        //    return;

        int setCount = pointSeries.Count;

        IBrush2D brush = renderContext.CreateBrush(Brushes.Red, 0.5);
        IPen2D pen = renderContext.CreatePen(Colors.Transparent, false, 0, 0);
        // Iterate over points collection and render point markers
        for (int i = 0; i < setCount; i++)
        {
            double xPoint = (double)pointSeries.XValues[i];//pointSeries[i].X;
            double yPoint = (double)pointSeries.YValues[i];//pointSeries[i].Y;
            double zPoint = (int)pointSeries.ZPoints[i];

            // Get coordinates for X,Y data values
            var x1 = (int)renderPassData.XCoordinateCalculator.GetCoordinate(xPoint);
            var y1 = (int)renderPassData.YCoordinateCalculator.GetCoordinate(yPoint);
            var z1 = (int)zPoint+2;

            //var pointMarkerRect = new Rect(0, 0, pointMarker.PixelWidth, pointMarker.PixelWidth);
            //double xOffset = pointMarkerRect.Width / 2;
            //double yOffset = pointMarkerRect.Height / 2;

            // Draw PointMarkers
            renderContext.DrawEllipse(pen, brush, new Point(x1, y1), z1 * 2, z1 * 2); //(new Rect(x1 - xOffset, y1 - yOffset, pointMarkerRect.Width, pointMarkerRect.Height), pointMarker, pointMarkerRect);
        }
        brush.Dispose();
        pen.Dispose();
    }
}

When directly, all is good:

<s:SciChartSurface x:Name="SciChartSurface"
                   DebugWhyDoesntSciChartRender="True"
                   GridLinesPanelStyle="{StaticResource GridLinesPanelStyle}"
                   DataContext="{Binding ElementName=userControl}"

                   ViewportManager="{Binding ViewportManager}"
                   ChartTitle="{Binding Title}">

    <s:SciChartSurface.RenderSurface>
        <s3D:Direct3D10RenderSurface />
    </s:SciChartSurface.RenderSurface>

    <s:SciChartSurface.RenderableSeries>
        <helpers:CustomXyScatterRenderableSeries DataSeries="{Binding Data}"  />
    </s:SciChartSurface.RenderableSeries>

    <s:SciChartSurface.XAxis>
        <s:NumericAxis AxisTitle="{Binding XAxisLabel}" LabelProvider="{StaticResource SINumericLabelProvider}"/>
    </s:SciChartSurface.XAxis>
    <s:SciChartSurface.YAxis>
        <s:NumericAxis AxisTitle="{Binding YAxisLabel}" LabelProvider="{StaticResource SINumericLabelProvider}"/>
    </s:SciChartSurface.YAxis>
    <s:SciChartSurface.ChartModifier>
        <s:ModifierGroup>
            <s:MouseWheelZoomModifier x:Name="mouseWheelZoomModifier" />
            <s:RubberBandXyZoomModifier ExecuteOn="MouseRightButton" IsAnimated="True" />
            <s:ZoomPanModifier />
            <s:ZoomExtentsModifier ExecuteOn="MouseDoubleClick" />
        </s:ModifierGroup>
    </s:SciChartSurface.ChartModifier>
</s:SciChartSurface>

But when using the View Model, it fails to display:

<s:SciChartSurface x:Name="SciChartSurface"
                   DebugWhyDoesntSciChartRender="True"
                   GridLinesPanelStyle="{StaticResource GridLinesPanelStyle}"
                   DataContext="{Binding ElementName=userControl}"

                   ViewportManager="{Binding ViewportManager}"
                   ChartTitle="{Binding Title}"
                   RenderableSeries="{s:SeriesBinding Series}">

    <s:SciChartSurface.RenderSurface>
        <s3D:Direct3D10RenderSurface />
    </s:SciChartSurface.RenderSurface>

    ....
</s:SciChartSurface>

I’m not sure what I’m doing wrong, as there doesn’t seem to be much more to it!

Edit: More info, in the code behind, I’m binding to this data for testing:

    public XyzDataSeries<float, float, int> Data { get; set; }
    public ObservableCollection<IRenderableSeriesViewModel> Series { get; set; }

    public LineChart()
    {
        this.DataContext = this;
        Data = new XyzDataSeries<float, float, int>();
        Data.Append(50, 50, 10);
        Data.Append(100, 100, 15);
        Series = new ObservableCollection<IRenderableSeriesViewModel>();
        Series.Add(new CustomXyScatterRenderableSeriesViewModel() { DataSeries = Data });

        InitializeComponent();
    }
  • Ken Hobbs asked 2 years ago
  • last active 2 years ago
1 vote
1k views

Hello,

My goal is to have the user select a series with a mouse click, and to see which series was selected while following the MVVM pattern. I am filling in the DataSeries using a LineSeriesSource attached behaviour.

What I tried so far is to attach to the SelectionChanged event of a Renderable series with an Interaction Trigger.

This doesn’t work:

        <SciChart:SciChartSurface.ChartModifier>

            <SciChart:ModifierGroup>

                <SciChart:SeriesSelectionModifier >
                    <i:Interaction.Triggers>
                        <i:EventTrigger EventName="SelectionChanged" >
                            <i:InvokeCommandAction Command="{Binding Path=cmdSelectedSeriesChanged}" CommandParameter="{Binding Path=SelectedSeries}"/>
                        </i:EventTrigger>
                    </i:Interaction.Triggers>
                    <SciChart:SeriesSelectionModifier.SelectedSeriesStyle>
                        <Style TargetType="SciChart:BaseRenderableSeries">
                            <Setter Property="Stroke" Value="White"/>
                            <Setter Property="StrokeThickness" Value="2"/>
                        </Style>
                    </SciChart:SeriesSelectionModifier.SelectedSeriesStyle>
                </SciChart:SeriesSelectionModifier>

        </SciChart:ModifierGroup>
        </SciChart:SciChartSurface.ChartModifier>

This works, but is not what I want since it’s not MVVM:

<SciChart:SciChartSurface.ChartModifier>

                <SciChart:ModifierGroup>

                    <SciChart:SeriesSelectionModifier SelectionChanged="SeriesSelectionModifier_SelectionChanged">

                        <SciChart:SeriesSelectionModifier.SelectedSeriesStyle>
                            <Style TargetType="SciChart:BaseRenderableSeries">
                                <Setter Property="Stroke" Value="White"/>
                                <Setter Property="StrokeThickness" Value="2"/>
                            </Style>
                        </SciChart:SeriesSelectionModifier.SelectedSeriesStyle>
                    </SciChart:SeriesSelectionModifier>

            </SciChart:ModifierGroup>
            </SciChart:SciChartSurface.ChartModifier>

Interaction Propety cannot be attached to SciChartSurface.RenderableSeries.
I also tried attaching the Interaction Property to an individual DataSeries, which is definitely not what I want to do, but it doesn’t work either.

/Tomasz

0 votes
900 views

Hi,

Could you provide some Mvvm examples that include:

1) Mvvm bubble chart where the Fill color is defined on the series view model
2) custom tooltips per point where the tooltip string is defined on the point view model

I have both of these kind of working using a workaround based on the obsolete SciChartSurface.SeriesSource property, but now I’m trying to migrate to SciChartSurface.RenderableSeries and the proper Mvvm API and I cannot find all the elements I need.

Cheers
Felix

  • F W asked 2 years ago
  • last active 2 years ago
0 votes
907 views

Using MVVM, I have an AnnotationCollection databound to the SciChartSurface.Annotations. Individual LineAnnotations are added to the collection as the application code runs.

If annotations are added while the chart is displayed, they are all drawn correctly.

However, if the chart page is reloaded (say, the user navigates to a different page and then returns to the chart page), the annotations do not always redraw. If the annotations have AnnotationCanvas set to default (AnnotationCanvas.AboveChart, I believe) they redraw correctly about 50% of the time. If the annotations’ AnnotationCanvas is set to AnnotationCanvas.XAxis, they never redraw.

All the annotations still exist in the ObservableCollection in all these cases, so they shouldn’t need to be re-created.

Is this a bug in SciChart or is there something I may be doing wrong with the annotations?
(There is only one X-Axis so no axisID is necessary.)

LineAnnotation lAnno = new LineAnnotation();
lAnno.CoordinateMode = AnnotationCoordinateMode.RelativeY;
lAnno.Y1 = 0.0;
lAnno.X1 = DataPoints;
lAnno.Y2 = 1.0;
lAnno.X2 = DataPoints;
lAnno.YAxisId = "Counts";
lAnno.Foreground = new System.Windows.Media.SolidColorBrush(System.Windows.Media.Color.FromRgb(255, 255, 255));
lAnno.Stroke = new System.Windows.Media.SolidColorBrush(System.Windows.Media.Color.FromArgb(96, 255, 0, 0));
lAnno.StrokeThickness = 2;
lAnno.AnnotationCanvas = AnnotationCanvas.XAxis;

Markers.Add(lAnno);
0 votes
1k views

I’m trying to set the visible range property of a CategoryDateTimeAxis through MVVM. I’m following the general instructions detailed here for converting between pixel & data coordinates on the axis:

https://www.scichart.com/questions/question/categorydatetimeaxis-in-mvvm#sabai-inline-nav

I have the following code in my viewmodel:

XAxis.OnBeginRenderPass();
var calc = XAxis.GetCurrentCoordinateCalculator();
var coordCalc = calc as ICategoryCoordinateCalculator;

XAxis is a CategoryDateTimeAxis injected from the view. I call OnBeginRenderpass as I saw in another forum post that this will ensure that the CoordinateCalculator is initialized.

calc shows in the debugger as:

  • calc {A.} Abt.Controls.SciChart.Numerics.CoordinateCalculators.ICoordinateCalculator {A.}

The coordCalc variable ends up assigned to NULL, as the ICoordinateCalculator< double > cannot be cast to the interface.

How do I accomplish the above?

Thanks, Asher

  • ashernew asked 2 years ago
  • last active 2 years ago
1 vote
2k views

Hi there,

We are looking for a high-performance charting library, hence Im testing scichart and I am very excited about it.

Our application has an very abstract processing mechanism which categorize incoming data and dynamically adds channels to the plot. Each sample is – like we call it – a ProcessedData object which is a base class containing extented information about the sample like “is valid” or “is out of range”. Eg. if measureing a voltage, we need to mark data points on the chart that are “out of range” or similar.
I’d thought to start with the “DragHorizontalThreshold” which uses the RedIfOverThresholdPaletteProvider to change the color of the plot.
Do you have an idea if it is possible to implement a custom PaletteProvider which takes respect of an IsValid-property? Acutally i do not have a clue how to.

Thanks.

  • Sven Fink asked 2 years ago
  • last active 2 years ago
0 votes
0 answers
2k views

Hello again!
I’m working with new scichart version (5th august). In view XAML file I have this code snippet:

visuals:SciChartSurface Annotations="{Binding AnnotationCollection}"  SeriesSource="{Binding GraphicsCollection}" XAxis="{Binding XAxis, Mode=TwoWay}" YAxes="{Binding YAxisCollection}"  >

When I try to run the application, I get this NullReferenceException:

   в A. .Convert(Object value, Type targetType, Object parameter, CultureInfo culture)
   в System.Windows.Data.BindingExpression.TransferValue(Object newValue, Boolean isASubPropertyChange)
   в System.Windows.Data.BindingExpression.Activate(Object item)
   в System.Windows.Data.BindingExpression.AttachToContext(AttachAttempt attempt)
   в System.Windows.Data.BindingExpression.AttachOverride(DependencyObject target, DependencyProperty dp)
   в System.Windows.Data.BindingExpressionBase.OnAttach(DependencyObject d, DependencyProperty dp)
   в System.Windows.DependencyObject.SetValueCommon(DependencyProperty dp, Object value, PropertyMetadata metadata, Boolean coerceWithDeferredReference, Boolean coerceWithCurrentValue, OperationType operationType, Boolean isInternal)
   в System.Windows.DependencyObject.SetValue(DependencyProperty dp, Object value)
   в System.Windows.Data.BindingOperations.SetBinding(DependencyObject target, DependencyProperty dp, BindingBase binding)
   в System.Windows.FrameworkElement.SetBinding(DependencyProperty dp, BindingBase binding)
   в Abt.Controls.SciChart.Visuals.Annotations.LineAnnotationWithLabelsBase.VB()
   в Abt.Controls.SciChart.Visuals.Annotations.LineAnnotationWithLabelsBase.TB()
   в Abt.Controls.SciChart.Visuals.Annotations.LineAnnotationWithLabelsBase.OnXAxesCollectionChanged(Object sender, NotifyCollectionChangedEventArgs args)
   в Abt.Controls.SciChart.Visuals.Annotations.AnnotationBase.Abt.Controls.SciChart.Visuals.Annotations.IAnnotation.OnXAxesCollectionChanged(Object sender, NotifyCollectionChangedEventArgs args)
   в Abt.Controls.SciChart.Visuals.Annotations.AnnotationCollection.OnXAxesCollectionChanged(Object sender, NotifyCollectionChangedEventArgs args)
   в Abt.Controls.SciChart.Visuals.SciChartSurface.OnXAxesCollectionChanged(Object sender, NotifyCollectionChangedEventArgs args)
   в System.Collections.Specialized.NotifyCollectionChangedEventHandler.Invoke(Object sender, NotifyCollectionChangedEventArgs e)

But if I change my xaml file this way:

visuals:SciChartSurface SeriesSource="{Binding GraphicsCollection}" XAxis="{Binding XAxis, Mode=TwoWay}" YAxes="{Binding YAxisCollection}" 
Annotations="{Binding AnnotationCollection}"   >

there won’t be any exceptions. I’ve attached project with exception below.

P.S. in the previuous version it works fine.

  • Egor asked 2 years ago
1 vote
2k views

Hi,

I’m creating a CustomChartModifier which I am able to hook to a SciStockChart (a template item in a SciChartGroup MVVM) and now I’m having difficulties in adding the BoxAnnotation to the Chart.

This is the code I’m using in my ChartModifier and placing a breakpoint shows me that indeed the code runs through this method, however, I do not see any BoxAnnotation on my chart? I’ve even tried adding the Height and Width properties without any further success. Other CustomModifiers to draw Lines and Ellipses works without problems. Do BoxAnnotations work differently?

I’m looking to have the the user be able to draw a BoxAnnotation on the chart, free hand / dynamically.

SimpleBoxAnnotationModifier.cs

public override void OnModifierMouseDown(ModifierMouseArgs e)
{
        base.OnModifierMouseDown(e);

        var resources = new AnnotationStyles();
        // x:Key="BoxAnnotationStyle" TargetType="s:BoxAnnotation"
        var style = (Style)resources["BoxAnnotationStyle"];

        _annotationCreation = new AnnotationCreationModifier () { AnnotationType = typeof(BoxAnnotation), AnnotationStyle = style };

        this.ModifierSurface.Children.Add(_annotationCreation);
}

AnnotationStyles.xaml

<ResourceDictionary xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
                xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
                xmlns:s="http://schemas.abtsoftware.co.uk/scichart"
                x:Class="ChartModifierBinding.AnnotationStyles">

<Style x:Key="BoxAnnotationStyle" TargetType="s:BoxAnnotation">
    <Setter Property="BorderBrush" Value="#279B27"/>
    <Setter Property="Background" Value="#551964FF"/>
    <Setter Property="BorderThickness" Value="1"/>
    <Setter Property="IsEditable" Value="True"/>
</Style>

Thanks for any pointers or tips!

  • David T asked 2 years ago
  • last active 1 year ago
0 votes
0 answers
2k views

Hi,

I’m looking to draw a BoxAnnotation onto a SciChartGroup ItemTemplate SciStockChart where the user will left mouse click, drag to define the size and releases to create the BoxAnnotation.

How should I go about doing this? Should I be looking at CustomModifiers or CustomAnnotations?

Any pointers will be very helpful

Thanks

David

0 votes
2k views

Hi,

I’ve been finding lots of examples of creating Custom Chart Modifiers however they are not using a SciChartGroup using a DataTemplate and not in a MVVM scenario.

I know MVVM is the preferred structure for WPF solutions, however it does introduces some complexities as well as using DataTemplates of a SciChartGroup, therefore, would someone please be so kind as to point me in the right direction for an example or two so that I can see how this all could work together?

I’m looking at Custom Chart Modifiers by use of a CustomModifier class. As this will give me the most flexibility in terms of what I would like to do in the future and I would also like to be able to switch between modifiers, such as Panning, Zooming and drawing annotations onto the chart.

Thanks everyone!

David

P.S. Andrew, if this requires a developer on your side to hash this out for an hour or so, let me know and I’ll be more than happy to pay for it.

  • David T asked 2 years ago
  • last active 2 years ago
1 vote
3k views

I’m implementing a toggle between joined and separated axes for my series and I’ve encountered a problem with my SeriesValueModifiers. The modifier seems to be connected to “DefaultAxisId”, when I have my series linked to an axis with that ID the values show up as expected. However, when I separate my series to individual axes the modifiers no longer appears.

Is it possible to collect and show all my SeriesValueModifiers on one axis (keeping the others invisible)? Or perhaps show modifiers on all the axes and stack them on top of each other, keeping labels invisible.

This is the code I’ve got right now:

Adding an axis in my constructor, this one will be used when all the series are using the same axis.

ChartYAxes.Add(new NumericAxis()
{
    Visibility = Visibility.Visible,
    AutoRange = AutoRange.Always,
});

Then I add a new axis for each series.

ChartYAxes.Add(new NumericAxis
{
    Id = tagName,
    Visibility = Visibility.Collapsed,
    AutoRange = AutoRange.Always
});

var renderableSeries = new FastLineRenderableSeries
{
    YAxisId = IsIsolatedCharts ? tagName : "DefaultAxisId"
};

Toggling between these works great, but I need the value labels for this to be useful in any way.

EDIT: In case it’s relevant, here’s the code for toggling.

private void SplitAxes()
{
    var count = Series.Count;
    for (int i = 0; i < count; i++)
    {
        var series = Series[i];
        var name = series.DataSeries.SeriesName;
        //The axes are also added to a dictionary for easy access.
        _axisDictionary[name].GrowBy = new DoubleRange(count - i - 1, i);
        series.RenderSeries.YAxisId = name;
    }
}

private void JoinAxes()
{
    foreach (var series in Series)
        series.RenderSeries.YAxisId = "DefaultAxisId";
}
1 vote
0 answers
2k views

Hi,

I’m evaluating SciChart. Our app requires that series and axes be dynamically added to the chart. So, I kind of followed the “Create Stock Charts Realtime Ticking Stock Charts” example to use the SeriesSource. The Append() method is used to add a data point in a worker thread. The total number of data point is just 10 and each data point arrives at about every second.

I saw that the line was not drawn until the last data point was added. The line chart was exactly what I expected. So, everything (SeriesSouce, axes, series, renderable series, bindings) seems to be working except that the line was not drawn real time. I added ViewportManager.InvalidateElement() right after the Append() method. But, the result was the same. I didn’t do anything special when the last data point arrived. So, I’m not sure why SciChart was able to show the line chart at the end.

Am I missing anything here?

Best Regards,

1 vote
4k views

I would like to template items of an AxisCollection assigned to a sciChartSurface in binding of an AxisItemCollectionViewModel. But it looks like I cannot do it as Visual Studio won’t compile my tries.

What i am looking for is something like the EEG 16 channel sample. There the ListBoxItems are styled via a template which is bound to a ViewModelItem. The ListBox itsself is bound to a ViewModelCollection. Depending on how many entries there are entries in the listbox.

So I would like to do something like this:

<SciChartSurface.AxisCollection ItemsSource="{Binding MyAxisCollectionViewModels}" ItemTemplate="{StaticResource AxisItemTemplate}" />

Is this possible? I don’t know how many y-axes i will have. They are configurable by the user.

  • Uwe Hafner asked 3 years ago
  • last active 3 years ago
1 vote
3k views

I saw in tips and tricks for performance the use of

scichartsurface.suspendupdate

before something is added to the dataseries. But usually I don’t have access in ViewModel to surface. How can I suspendupdate in the ViewModel when updating the series?

Is dataseries.SuspendUpdate used for this?

  • Uwe Hafner asked 3 years ago
  • last active 3 years ago
0 votes
0 answers
3k views

I noticed that there are problems when I try to add data series, create renderable series, or annotations while the view that hosts the scichartgroup and/or scichartsurface(s) is/are not yet initialized/rendered. Could this be a bug? After all it should not matter when the view is rendered; when it is rendered its elements bind to the matching properties of its viewmodel, no?

This poses problems for me because I am forced to take the viewmodel-first approach. So, when I create an instance of my viewmodel and then invoke methods in the viewmodel that add data series and render such I am experiencing errors (the rendered series is not displayed on the chart, though annotations strangely are).

I identified the problem to be 2-fold, one is that I have to create renderable series on the UI thread (solved that, no issue) but my other big problem is that the view is actually not instantiated/rendered unless the view is in focus/visible which is not the case during runtime when data series are added via viewmodel.

How can I solve this problem?

  • bbmat asked 3 years ago
  • last active 3 years ago
0 votes
0 answers
3k views

I try to add data series and have them rendered on a chart surface. The surface and entire chart library is wrapped in an mvvm-based api. The sci chart control and wrapping library are rendered on a document panel. I add new data series via the viewmodel and here is where I have some unexpected behavior:

a) When being on a different document panel, meaning the chart control is NOT visible, and when I add a new data series via view model and then view the document panel that hosts the sci chart control, no chart series are rendered on the chart but I do see the correct legend data (such as chart series name, color, stroke thickness). Please see below screen shot “Capture1.jpg” .

b) When I make the sci chart control visible by viewing the document panel that hosts the sci chart control and then via a button and command add the very same data series via my chart control’s view model the charts are correctly rendered. Please see “Capture2.jpg”.

My question is why is that the case? I basically expose a method in my chart library view model that lets me add data and if I invoke that methods while being on a document panel that does not host the chart control the added data series is not rendered on the chart. But strangely the correct chart legend data are displayed and also the chart control itself is correctly rendered. No problems when the hosting document panel is active and the very same method is invoked.

Basically what I currently observe is that the data series are not rendered at all as long as the chart control is not “in view” or the hosting document panel is not selected. I am sure programmatically all references and bindings are correct.

I have spend many hours debugging this issue and do not seem to find an answer. Any pointers?

Thanks a lot,
Matt

Edit:

Here is how I bind the content control to the view model of my sci chart charting library (user control)

<ContentControl Grid.Row="1" Content="{Binding ChartControl, Mode=OneWay}" />

…and the view model is instantiated in the hosting view model constructor:

public MainWindowViewModel()
    {
       ChartControl = new SciChartControlViewModel();

        ExitApplicationCommand = new RelayCommand(OnExitApplicationCommand);
        LoadDataSeriesFromFilesCommand = new RelayCommand(OnLoadDataSeriesFromFilesCommand);
        RefreshDataSeriesFromFilesCommand = new RelayCommand(OnRefreshDataSeriesFromFilesCommand);


        Test();

    }

…Test() performs the following action:

private void Test()
    {
        var quotes = new List<Quote>();
        List<DateTime> timeStamps = new List<DateTime>();
        List<double> values = new List<double>();
        List<SciChartAnnotation> annotations = new List<SciChartAnnotation>();
        Random rand = new Random((int)DateTime.Now.Ticks);
        DateTime currentDt = DateTime.Now;
        double currentValue = 0;

        for (int index = 0; index <= 50000; index++)
        {
            var randomValue = rand.NextDouble();
            currentDt = currentDt + TimeSpan.FromSeconds(randomValue);
            currentValue = currentValue + randomValue - 0.5;

            if (index % 1000 == 0)
            {
                var buySell = rand.NextDouble() > 0.5 ? SciChartAnnotationDirection.Buy : SciChartAnnotationDirection.Sell;
                annotations.Add(new SciChartAnnotation(buySell, currentDt, currentValue, "Index:" + index));
            }

            timeStamps.Add(currentDt);
            values.Add(currentValue);

            quotes.Add(new Quote(){DataProviderId = "Provider1", SymbolId = "Symbol1", QuoteType = QuoteType.BidAsk, CompressionType = TimeCompressionType.NoCompression, CompressionUnits = 0, TimeStamp = currentDt, Bid = currentValue, Ask= currentValue + 0.05, });

        }

        ChartControl.AddDataSet("Pane1", "0.00000", quotes, annotations);
        //ChartControl.AddDataSet("MattSeries", ChartType.Scatter, 1, "0.00000", timeStamps, values);

    }

…it basically tries to render chart series and annotations.

Strangely, as mentioned before, the series legends render correctly and the annotations also all render correctly but the chart series do not! Could this be a bug? Please refer to the image “Capture3” for a screenshot.

  • bbmat asked 3 years ago
  • last active 3 years ago
0 votes
4k views

Hi,

Was hoping you could point me in the right direction. I’m trying to create horizontal line annotations on demand using MVVM but have become stuck. I’ve have them working in MVVM when the chart loads but not when a button is clicked although I have achieved this using code behind.

I’ve tried using an observable collection of AnnotationCollection type but am struggling to add the horizontal lines annotations to it as they are of a different type.

Any pointers in the right direction would be much appreciated!

Thanks,
Tim

Example of MVVM

TradeAnnotations = CreateHorizontalAnnotations();

private AnnotationCollection _annotations;

    public AnnotationCollection TradeAnnotations
    {
        get { return _annotations; }
        set
        {
            _annotations = value;
            OnPropertyChanged("TradeAnnotations");
        }
    }

    private static AnnotationCollection CreateHorizontalAnnotations()
    {
        //var annotations = new AnnotationCollection();

        var annotations = new AnnotationCollection();

        Color strokeColor = (Color)ColorConverter.ConvertFromString("#008B45");
        Brush strokeBrush = new SolidColorBrush(strokeColor);

        HorizontalLineAnnotation annotation = new HorizontalLineAnnotation();

        annotation.ShowLabel = true;
        annotation.LabelPlacement = LabelPlacement.Axis;
        annotation.HorizontalAlignment = HorizontalAlignment.Stretch;
        annotation.IsEditable = true;
        annotation.SnapsToDevicePixels = true;
        annotation.Stroke = strokeBrush;

        annotation.X1 = DateTime.Now;
        annotation.Y1 = 129;

        annotations.Add(annotation);

        return annotations;          
    }

Example of code behind

        private void CreateHorizontalAnnotations(object sender, System.Windows.RoutedEventArgs e)
    {
        //var annotations = new AnnotationCollection();

        var annotationCollection = new AnnotationCollection();

        Color strokeColor = (Color)ColorConverter.ConvertFromString("#008B45");
        Brush strokeBrush = new SolidColorBrush(strokeColor);

        HorizontalLineAnnotation annotation = new HorizontalLineAnnotation();

        annotation.ShowLabel = true;
        annotation.LabelPlacement = LabelPlacement.Axis;
        annotation.HorizontalAlignment = HorizontalAlignment.Stretch;
        annotation.IsEditable = true;
        annotation.SnapsToDevicePixels = true;
        annotation.Stroke = strokeBrush;

        annotation.X1 = DateTime.Now;
        annotation.Y1 = 129;

        this.priceChart.Annotations.Add(annotation);
    }
1 vote
4k views

I am trying out SciChart ( and WPF ) for a large dataset and till so far very pleased with the results. I have followed the example as described here http://support.scichart.com/index.php?/Knowledgebase/Article/View/17258/0/creating-a-custom-scichartoverview-with-many-series-using-the-scrollbar-api and can successfully view my bound data and everything is perfect for the first instance.

However, when I assign this usercontrol to different tabs they still somehow share data about the viewstate ( the overview window does not resize, and the slider thing in front of it stays at the same values. My guess is that it has to do with the messages in ActualSizePropertyProxy , but since I am new to SciChart and WPF I was hoping that maybe someone here knows what it is.

Thanks.

  • Michel Moe asked 3 years ago
  • last active 3 years ago
0 votes
4k views

I am directly editing my XyDataSeries on a chart by using my mouse. As the mouse moves I edit either the x or y value of a point using the methods

    public void SetPointYValueAt(IDataSeries series, int index, double newValue)
    {
        series.YValues[index] = newValue;
        series.InvalidateParentSurface(RangeMode.None);
    }

    public void SetPointXValueAt(IDataSeries series, int index, double newValue, double xMin, double xMax)
    {
        var xValue = newValue;

        // limit x values to keep them sorted
        if (xValue < xMin) xValue = xMin;
        if (xValue > xMax) xValue = xMax;
        series.XValues[index] = xValue;

        series.InvalidateParentSurface(RangeMode.None);
    }

With this code I am not getting an update at my ViewModel:

    public IDataSeries<double, double> MyDataSeries
    {
        get { return _myDataSeries; }
        set
        {
            _myDataSeries = value;
            OnPropertyChanged("MyDataSeries");
        }
    }

Here is my XAML:

            <sciChartExtensions:StepLineRenderableSeries x:Name="HResitivitySeries" IsDigitalLine="True" DataSeries="{Binding MyDataSeries, Mode=TwoWay}">

Where StepLineRenderableSeries is derived from FastLineRenderableSeries with IsDigitalLine = true and the HitTest method overridden.

How can I get MyDataSeries to update?

1 vote
4k views

We keep getting asked What’s the best practice way to suspend the SciChartSurface in a multi-pane stock chart demo.

We have multiple ways of doing this.

By far the most effective and thread-safe way to do this is to call SuspendUpdates directly on the SciChartSurface. But how to do this in a ViewModel?

  • Andrew asked 3 years ago
  • last active 3 years ago
0 votes
4k views

Hi,

I’m trialing SciChart and want to chart an XY Series where the X values are DateTime. I want to be able to switch between plotting the data as a single series on a DateTimeAxis and plotting multiple series per Date on a NumericAxis by splitting the original series into 1 series per day with the X value being the time of day in hours (Integer). Is there an easy way to switch between a DateTime and Numeric axis from my View Model – I’ve tried creating two axis with seperate Id’s and changing the visibility but it didn’t work

Regards
Dave

1 vote
4k views

Hi,

I am having a problem with two SciChartSurface’s sharing the same ViewModel instance. I am using the Master-Detail View pattern to provide a list of charts (Collection of SciChart surfaces) with continuously updating data from a device) within a Listbox container on the left-hand side. On the right-hand side I provide the current selected chart with extended size and some extra controls.

The visual appearance of the SciChartSurface (shared across both sides) is defined via data template

<Window.Resources>
    <local:WorkspaceViewModel x:Key="WorkspaceViewModel" />
    <DataTemplate x:Key="ChartDataTemplate">
        <Border MinHeight="200">
            <visuals:SciChartSurface DebugWhyDoesntSciChartRender="True"
                                     visuals:ThemeManager.Theme="BrightSpark"
                                     SeriesSource="{Binding ., Mode=TwoWay}">
                <visuals:SciChartSurface.XAxis>
                    <visuals:NumericAxis VisibleRange="0.0, 10.0"
                                         AutoRange="Always" />
                </visuals:SciChartSurface.XAxis>

                <visuals:SciChartSurface.YAxis>
                    <visuals:NumericAxis VisibleRange="-1.0, 1.0"
                                         AxisAlignment="Left"
                                         AutoRange="Always" />
                </visuals:SciChartSurface.YAxis>
                <visuals:SciChartSurface.ChartModifier>
                    <visuals:SeriesValueModifier ReceiveHandledEvents="True"></visuals:SeriesValueModifier>
                </visuals:SciChartSurface.ChartModifier>
            </visuals:SciChartSurface>
        </Border>
    </DataTemplate>
</Window.Resources>

and is used within the ListBox and ContentControl in the following way

<Grid DataContext="{StaticResource WorkspaceViewModel}">
    <Grid.ColumnDefinitions>
        <ColumnDefinition Width="200*"
                          MinWidth="225"
                          MaxWidth="700" />
        <ColumnDefinition Width="Auto" />
        <ColumnDefinition Width="375*" />
    </Grid.ColumnDefinitions>

    <GroupBox Grid.Column="0">
        <ListBox x:Name="ListBox"
            SelectedItem="{Binding SelectedChart}"
                 HorizontalAlignment="Stretch"
                 VerticalAlignment="Stretch"
                 ItemsSource="{Binding Charts}"
                 HorizontalContentAlignment="Stretch"
                 ItemTemplate="{StaticResource ChartDataTemplate}" />
    </GroupBox>
    <GridSplitter Grid.Column="1"
                  Width="5"
                  HorizontalAlignment="Right"
                  VerticalAlignment="Stretch"
                  ResizeBehavior="PreviousAndNext" />
    <GroupBox Grid.Column="2">
        <ContentControl x:Name="ContentControl"
            Content="{Binding SelectedChart}"
                        ContentTemplate="{StaticResource ChartDataTemplate}" />
    </GroupBox>
</Grid>

The ViewModel (WorkspaceViewModel) contains two properties:

ObservableCollection<ObservableCollection<IChartSeriesViewModel>> Charts
public ObservableCollection<IChartSeriesViewModel> SelectedChart

So far, so good. Once populated with live chart data, the ListBox displays all charts with live updating of the DataSeries. The issue I encounter is that once a chart in the ListBox is selected, the Detail View gets updated and continues displaying live data updates, but the ListBox entry stops updating. Obviously the sharing of the same instance of IChartSeriesViewModel in two different SciChartSurface views (via the ViewModel property SelectedChart) is causing trouble.

What am I missing here? I am currently using SciChart 3.0.

Many thanks,

Silvio

  • swiedric asked 3 years ago
  • last active 3 years ago
1 vote
6k views

I’ve created an application with MVVM in mind and managed to create a simple, working graph with SciChart that displays the data needed.
I’ve also seen some features (https://www.scichart.com/customer-case-study-blueshift-one-system/) which we’ll be planning on implementing, designing it to fit our own needs of course.

I’m wondering if there are some limitations (and perhaps improvements in later releases), that we could keep in mind while continuing to plan and develop our application with SciChart and MVVM?

1 vote
5k views

Hello,

I have a scichart and bound to its VM class. Inside this VM there is a Highlights property.

On the MainWindow, I am placing two of this charts with their own VM instance.

The problem is that when the Annotations is bound, it is only drawn on the last chart as shown in the image.

If I manually code in xaml the annotations (no binding) then the annotations are drawn in both charts.

How can I make it work with the binding?

Thanks

  • Miguel Hau asked 3 years ago
  • last active 3 years ago
1 vote
7k views

I am using the MVVM pattern.

I trying to manage the number of YAxes in my chart in a dynamic manner by binding the YAxes in the chart to a collection so that each time I add a new line series that line series gets its own axis.

When I do this I am getting a null reference expection.
If I hard code the YAxes or YAxis my chart loads.

Here is the xaml:

<SciChart:SciChartSurface x:Name="historicalChart" 
    RenderableSeries="{Binding HistoricalRenderableSeries, Mode=TwoWay}"
    YAxes="{Binding ChartYAxes, Mode=TwoWay}"
    SciChart:ThemeManager.Theme="ExpressionLight">
   ...
</s:SciChartSurface>

Here is the ViewModel

I tried both an ObservableCollection and a AxisCollection in my view model.

private ObservableCollection<NumericAxis> _chartYAxes = new ObservableCollection<NumericAxis>();
public ObservableCollection<NumericAxis> ChartYAxes
{
  get { return _chartYAxes; }
  set
  {
    _chartYAxes = value;
    NotifyPropertyChanged("ChartYAxes");
  }
}

private AxisCollection _chartYAxes = new AxisCollection();
public AxisCollection ChartYAxes
{
  get { return _chartYAxes; }
  set
  {
    _chartYAxes = value;
    NotifyPropertyChanged("ChartYAxes");
  }
}

Can anyone suggest a way to manage a variable number of YAxes in a chart?

  • sdemooy asked 5 years ago
  • last active 3 years ago
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