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Hello,

I am experiencing an issue with the BoxAnnotation in SciChart where the precision of the box’s boundaries does not accurately match the data points it is supposed to represent. When dynamically creating a BoxAnnotation to highlight a range of values on a chart, the upper boundary (y2) is set to match the maximum value within the specified range. Despite the calculation seeming accurate, the rendered annotation’s top edge is visually lower than the top of the highest column it encompasses, creating a slight discrepancy. In my application, I am creating a lot of charts, and this issue occurs only on charts with a big data range.

Environment:

SciChart Version: 3.2.532
Browser: Chrome

Attaching code snippet on jsfiddle:
https://jsfiddle.net/c9dekx6v/2/

Regards,
Dmytro

When using FastCandlestickRenderableSeries, I want every value to appear on the chart. I tried to use DataLabelProvider for this, but it didn’t work. What can I do.

class CustomDataLabelProvider extends DataLabelProvider {
onDataPoint(renderableSeries, xValue, yValue) {
    const labelText = `${yValue.toFixed(2)}`;

    const label = document.createElement('div');
    label.textContent = labelText;
    label.style.position = 'absolute';
    label.style.color = 'black';
    label.style.fontSize = '12px';
    label.style.left = `${this.parentSurface.coordinateCalculator.getCoordinateFrom(xValue) - label.clientWidth / 2}px`;
    label.style.top = `${this.parentSurface.coordinateCalculator.getCoordinateFrom(yValue) - label.clientHeight}px`;

    this.parentSurface.annotationCanvas.appendChild(label);
  }
}



const { sciChartSurface, wasmContext } = await SciChartSurface.create("scichart-root", {
theme: new SciChartJSLightTheme(),   
titleStyle: { fontSize: 22 },
 });

sciChartSurface.applyTheme(new SciChartJSLightTheme());
sciChartSurface.xAxes.add(new NumericAxis(wasmContext));
sciChartSurface.yAxes.add(new NumericAxis(wasmContext));
const yAxis = sciChartSurface.yAxes.get(0);
yAxis.visibleRange = new NumberRange(LAL, UAL);
const xAxis = sciChartSurface.xAxes.get(0);
xAxis.visibleRange = new NumberRange(0, endBarIndex);

const dataSeries = new OhlcDataSeries(wasmContext, {
xValues: xValues,
openValues: compositeScanAverageArray,
highValues: yValues,
lowValues: compositeScanAverageArray,
closeValues: yValues,
});

sciChartSurface.renderableSeries.add(new FastCandlestickRenderableSeries(wasmContext, {
dataSeries: dataSeries,
strokeThickness: 1,
dataPointWidth: 0.5,
paletteProvider: new CustomPaletteProvider(),
dataLabelProvider: new CustomDataLabelProvider(),
 }));

Hi everyone,

I have a chart with a ZoomPanModifier that allows to pan over the X axis only, what I’d like to accomplish is to append more data when the user reaches the max value of the axis while panning.

Is there an event to bind to a command or some other way to do something like this in MVVM?
I’d like to avoid using visible range events and only have this behaviour while panning if possible.

Thanks a lot,

Marco

I want to make label on yAxis.
SCIChart provides AxisMarkerAnnotation, but I want to use CustomAnnotation because I need something custom.
So I tried drawing a CustomAnnotation on the yAxis but failed.
Android succeeds in drawing CustomAnnotation on the yAxis using the method below, but iOS doesn’t provide it?
On iOS, Can’t customAnnotation only set the value of the yAxis like AxisMarkerAnnotation?
Android was possible…

error message like this
Exception raised with reason: CALayer position contains NaN: [nan 248.71]. Layer: <CALayer:0x280c10bc0; position = CGPoint (0 0); bounds = CGRect (0 0; 0 0); delegate = <BTChart.CurrentPriceAnnotationView: 0x13d74d8f0; frame = (0 0; 0 0); layer = <CALayer: 0x280c10bc0>>; sublayers = (<_UILabelLayer: 0x282d15860>); opaque = YES; allowsGroupOpacity = YES; >

I’m developing chart with sci chart. And I current make candle stick chart.

I want to get correct center coordinate from user’s touch location.

so, I tried this way.

1. get touch location
2. get axis data from touch location like this
3. get coordinate from data

let location = gestureRecognizer.location(in: self) // type is CGPoint
let selectedDate = xAxis.getDataValue(Float(location.x)) // xAxis's type is ISCIAxis
let selectedPoint = xAxis.getCoordinate(selectedData)

If I do that, no matter how far to the right you touch from the center line of the candlestick, you will get the position of the left candlestick.

If the candlestick center line is not crossed, the left data is unconditionally obtained.

I want to get the data closest to the touch, how do I do that?

The chart is only showing 3 of 4 Tooltips, is there a way to avoid this?

The SciChart.Core.ExportType.Xps value was deprecated in a recent SciChart release. Are there plans to change this to another vector format? Or will this feature no longer be available?

Thanks!

I want to implement something like, if a certain analysis value/custom logic is true for one of the values in the loop, –> set this bar color to ‘orange’ as an example, how can i do this?

   // Create a dataset of type x=DateTime, y=Double
  var dataSeries = new OhlcDataSeries<DateTime, double>();

   // Prices are in the format Time, Open, High, Low, Close (all IList)
  var prices = smallerList;

    // Append data to series. SciChart automatically redraws
    for (var i = 0; i < prices.Count(); i++)
   {

 // Convert TIME to a 4-digit string (e.g., 5 becomes "0005", 15 becomes "0015")
 string timeString = prices[i].Value.TIME.ToString("D4");

 // Parse the TIME field
 int hour = int.Parse(timeString.Substring(0, 2));
 int minute = int.Parse(timeString.Substring(2, 2));

 // Create the DateTime object
 DateTime dateTime = new DateTime(prices[i].Value.YEAR, prices[i].Value.MONTH, prices[i].Value.DAY,      hour, minute, 0);
 Dispatcher.Invoke(() =>
 {
     //here we append values in 'dataSeries', how do i do something like, 'bool condition = 
// returnCustomLogic('dataValues') --> outputs true, if true --> set this bar color to orange

     // Update the UI element on the UI thread
     dataSeries.Append(
    dateTime,
    (double)prices[i].Value.OPEN,
    (double)prices[i].Value.HIGH,
    (double)prices[i].Value.LOW,
    (double)prices[i].Value.CLOSE);

   });


   }
     Dispatcher.Invoke(() =>
     {
 StockChart.RenderableSeries[0].DataSeries = dataSeries;

 // Zoom Extents - necessary as we have AutoRange=False
 StockChart.ZoomExtents();
   });

I have a chart with multiple series, left and right y-axes and one x-axis, some series are assign to left y-axis and some are right y-axis and they all have the same x-axis.

But there is one specific serie that need to be control on its own. I consider adding another y-axis either on the left or right axis, but the issue with that is that both the left and right axes are vertically stacked with some other y-axes. So, if I add another y-axis, it will just be stacked, but I need this y-axis to be on its own and not stacked.

The image below show my current chart, and the white line serie is the one that need a y-axis of its own. Currently it is attach to the right y-axis.

Hello scichart team!

We would like to run e2e tests for our application, which uses the scichirt.js library. To run e2e, we will be running a local development server with our SPA app in some CI environment.

Is there a way to avoid installing a license manager for e2e in CI env and use RuntimeLicenseKey, but for localhost?

Hi, I have a problem with the Y-axis mouse scroll sensitivity regarding values, if you take a look here, you can see that it will take a lot of separate scrolls to reach the desired Y-axis value
due to a low level of sensitivity
how can I solve this problem

my code

“`

        <s:SciChartSurface x:Name="scs" 
                           RenderableSeries="{s:SeriesBinding Series}" 
                           ViewportManager="{Binding ViewportManager}"
                           BorderThickness="2,2,2,0"
                           s:VisualXcceleratorEngine.EnableImpossibleMode="True"
                           LeftAxesPanelTemplate="{StaticResource YAxesPanel}"
                           Grid.Row="0"   
                           MouseDoubleClick="OnChartMouseDown">


            <s:SciChartSurface.XAxes>
                <!-- Hidden Axis that tracks the data -->
                <s:NumericAxis AutoRange="Always"
                               DrawMinorGridLines="False"
                               DrawMinorTicks="False"
                               DrawMajorGridLines="False"
                               DrawMajorTicks="False"
                               Visibility="Collapsed"
                                />
                <!--Hidden Axis that track the annotations' locations (All the added annotations have the same XAxis Id-->
                <s:NumericAxis Name="SharedXAxisCommon"  
                                AutoRange="Never"
                                VisibleRangeLimit="0,10"
                                Height="1"
                                Visibility="Hidden"  
                                Id="CommonID_X"/>
            </s:SciChartSurface.XAxes>

            <s:SciChartSurface.YAxes >
                <s:NumericAxis AutoRange="Never"
                               AutoTicks="True"
                               DrawMinorGridLines="False"
                               DrawMinorTicks="False"
                               DrawMajorGridLines="False"
                               DrawMajorTicks="True"
                               VisibleRange="0,8128000"
                               Visibility="Collapsed"/>
            </s:SciChartSurface.YAxes>
            <s:SciChartSurface.ChartModifier>
                <s1:ModifierGroup>
                    <s1:YAxisDragModifier/>
                    <s:SeriesSelectionModifier >
                        <s:SeriesSelectionModifier.SelectedSeriesStyle>
                            <Style TargetType="s:BaseRenderableSeries">
                            </Style>
                        </s:SeriesSelectionModifier.SelectedSeriesStyle>
                    </s:SeriesSelectionModifier>
                </s1:ModifierGroup>
            </s:SciChartSurface.ChartModifier>

        </s:SciChartSurface>
        <Grid>
            <Grid.RowDefinitions>
                <RowDefinition Height="0.3*"/>
                <RowDefinition Height="2*"/>
            </Grid.RowDefinitions>
            <TextBlock Grid.Row="1" x:Name="InportValueTextBlock" Text="{Binding InportValue}" Margin="20,0,0,0" FontSize="14"/>
        </Grid>
    </Grid>

“`

Hi, I have problem with the Y axis values, if you take a look here,

the numbers are not intuitive is there a way to fix it?

I tried to set the AutoTicks=”True” but it did nothing

the code

“`

<UserControl.Resources>
    <BooleanToVisibilityConverter x:Key="b2vc"/>
    <local:BoolToAxisAutoRangeConverter x:Key="AutoRangeConverter" />
    <local:StarsConverter x:Key="conv"/>
    <ItemsPanelTemplate x:Key="YAxesPanel" >
        <Grid local:GridHelpers.RowCount="{Binding RowsCount}"
              local:GridHelpers.StarRows="{Binding RowsCount, Converter={StaticResource conv}, Mode=OneWay}"
              local:GridHelpers.ColumnCount="1"

              >
        </Grid>
    </ItemsPanelTemplate>
    <Style x:Key="MinorTickLineStyle" TargetType="Line">
        <Setter Property="Stroke" Value="White"/>
    </Style>

</UserControl.Resources>



<Grid x:Name="MainGrid">
    <Grid.ColumnDefinitions>
        <ColumnDefinition Width="*"/>
    </Grid.ColumnDefinitions>

    <!-- Toolbar -->
    <Border Style="{DynamicResource OriginalBorderBright}" BorderThickness="0" Canvas.ZIndex="9999" Visibility="Collapsed">
        <StackPanel Orientation="Vertical">
            <RadioButton x:Name="RunBtn" Command="{Binding RunCommand}" IsChecked="True" Visibility="Hidden"/>
            <RadioButton x:Name="PauseBtn" Visibility="Hidden"/>
        </StackPanel>
    </Border>

    <!-- Chart Surface -->
    <Grid Grid.Column="1" >

        <s:SciChartSurface x:Name="scs" 
                           RenderableSeries="{s:SeriesBinding Series}" 
                           ViewportManager="{Binding ViewportManager}"
                           BorderThickness="2,2,2,0"
                           s:VisualXcceleratorEngine.EnableImpossibleMode="True"
                           LeftAxesPanelTemplate="{StaticResource YAxesPanel}"
                           Grid.Row="0"   
                           MouseDoubleClick="OnChartMouseDown">


            <s:SciChartSurface.XAxes>
                <!-- Hidden Axis that tracks the data -->
                <s:NumericAxis AutoRange="Always"
                               DrawMinorGridLines="False"
                               DrawMinorTicks="False"
                               DrawMajorGridLines="False"
                               DrawMajorTicks="False"
                               Visibility="Collapsed"
                                />
                <!--Hidden Axis that track the annotations' locations (All the added annotations have the same XAxis Id-->
                <s:NumericAxis Name="SharedXAxisCommon"  
                                AutoRange="Never"
                                VisibleRangeLimit="0,10"
                                Height="1"
                                Visibility="Hidden"  
                                Id="CommonID_X"/>
            </s:SciChartSurface.XAxes>

            <s:SciChartSurface.YAxes >
                <s:NumericAxis AutoRange="Never"
                               AutoTicks="True"
                               DrawMinorGridLines="False"
                               DrawMinorTicks="False"
                               DrawMajorGridLines="False"
                               DrawMajorTicks="True"
                               VisibleRange="0,8128000"
                               Visibility="Collapsed"/>
            </s:SciChartSurface.YAxes>
            <s:SciChartSurface.ChartModifier>
                <s1:ModifierGroup>
                    <s1:YAxisDragModifier/>
                    <s:SeriesSelectionModifier >
                        <s:SeriesSelectionModifier.SelectedSeriesStyle>
                            <Style TargetType="s:BaseRenderableSeries">
                            </Style>
                        </s:SeriesSelectionModifier.SelectedSeriesStyle>
                    </s:SeriesSelectionModifier>
                </s1:ModifierGroup>
            </s:SciChartSurface.ChartModifier>

        </s:SciChartSurface>
        <Grid>
            <Grid.RowDefinitions>
                <RowDefinition Height="0.3*"/>
                <RowDefinition Height="2*"/>
            </Grid.RowDefinitions>
            <TextBlock Grid.Row="1" x:Name="InportValueTextBlock" Text="{Binding InportValue}" Margin="20,0,0,0" FontSize="14"/>
        </Grid>
    </Grid>


    <Border Grid.Column="1" Style="{DynamicResource OriginalBorderBright}" Visibility="{Binding IsLoading, Mode=OneWay, Converter={StaticResource b2vc}}">
        <StackPanel Orientation="Vertical" HorizontalAlignment="Center" VerticalAlignment="Center">
            <ProgressBar Background="Transparent" BorderThickness="0"  HorizontalAlignment="Center" IsIndeterminate="True" Height="10" Width="{Binding ActualWidth, Mode=OneWay, ElementName=Test}"/>
            <TextBlock x:Name="Test" Text="{Binding LoadingMessage, Mode=OneWay}" FontSize="16" Foreground="{DynamicResource ControlDefaultForeground}" Margin="0,10" TextAlignment="Center" Opacity="0.7"/>
        </StackPanel>
    </Border>
</Grid>

“`

Hi. I’m currently working with sci chart iOS.

I create a custom crosshair modifier and get satisfactory results for most movements.

That crosshair by referring to your finance app, and one problem is that when the finger dragging the crosshair moves to the axis surface area, the crosshair movement stops.

It is true that the crosshair is only drawn on the chart surface, but I think I should continue to receive events even if it crosses the axis surface while dragging. How do I do that?

And another Q2. how to pause crosshair dragging event?

When I have multiple chart(vertical group), If I turn on crosshair and I start resizing dragging, crosshair is update according to dragging.

I hope just stop crosshair, but visible state. How can I do that?

I am currently using the ImpulseRenderableSeries3D chart for dynamic data plotting, but I’ve encountered an issue where the data points are sometimes being plotted outside the axis boundaries. I have attached an image to illustrate the problem. Could you please assist me in addressing this issue?

Thank you

Hi,
Is it possible to add the scrollbar in the chart. If the visibleRangeLimit is set is it possible to add the normal scrollbar in the side of the chart.

We created a medical simulation similar to your demo: https://demo.scichart.com/javascript-vital-signs-ecg-medical-chart-example

We choose scichart (JS) as the app has to be high performant. In development (I’m working on a mac machine) everything is working great. Now in production I’m surprised, that most computers in our hospital can’t handle scichart, as it is running extremely slow (really slow motion).
I checked also your demo app, which also runs only in slow motion. So it seems not to be an application problem, but a scichart problem. On my development machines there is no problem with the demo.

The slow motion problem occurs on our iPads and on multiple windows machines (VM) with e.g. intel i5 processor.

Is there anything I can do to get scichart JS apps running?

Hello.

I’m facing an issue where a previous team member didn’t deactivate licenses on used devices. The device has now been returned, and deactivation is currently not possible. I need to reuse a project used SciChart. Is there a way to reset the list of all previously activated devices?

Thank you.

I’m trying to add rollover / tooltip to a chart, which uses sweeping. First, everything is working fine, but after updating the data over more then one page, the rollover is messing around with the data.

I created a codesandbox with the vitalsign demo: https://codesandbox.io/p/sandbox/javascript-vital-signs-ecg-medical-chart-example-forked-2zqcs3

First the rollover works great. Wait until the data is updated to the left side. Then you’ll see the messed up values and rollover points.

stack overflow link : https://stackoverflow.com/questions/77781766/reactjs-sweep-line-optimizing-scichartjs-performance-reusing-wasmcontext-for-m

I have a performance problem with scichartjs, when initializing about 40 charts/surfaces the rendering state drops to 5-10 frames per second.

I think it might be related to the fact that I run the create function each time and not reusing the wasmContext maybe?
but I am not sure how to reuse the wasmContext or what is the best performance for this kind of type

demo : https://9669tv.csb.app/

(sorry for the low quality of the Giff due to 2 MB max size of upload)

this is my init function

export const initScichart = async (divElementId) => {
  SciChartSurface.UseCommunityLicense();
  //console.log(divElementId.id);
  const { sciChartSurface, wasmContext } = await SciChartSurface.create(
    divElementId,
    {
      theme: new SciChartJsNavyTheme(),
    }
  );

  sciChartSurface.xAxes.add(
    new NumericAxis(wasmContext, {
      visibleRange: new NumberRange(0, 5),
    })
  );
  sciChartSurface.yAxes.add(
    new NumericAxis(wasmContext, {
      autoRange: EAutoRange.Always,
    })
  );

  const xyDataSeries = new XyDataSeries(wasmContext, {
    fifoCapacity: 220_000, // set fifoCapacity. Requires scichart.js v3.2 or later
    fifoSweeping: true,
    fifoSweepingGap: 2_200,
    containsNaN: false,
    isSorted: true,
  });

  sciChartSurface.renderableSeries.add(
    new FastLineRenderableSeries(wasmContext, {
      dataSeries: xyDataSeries,
      strokeThickness: 1,
      stroke: "#50C7E0",
    })
  );

  xyDataSeries.sciChartSurfaceToDelete = sciChartSurface;

  return xyDataSeries;
};

the reason I need the charts on different surfaces is that I need to wrap them in SortableJS (to be able to drag them across the website)

I’m new to SciChart and have been following the tutorial provided by SciChart (SciChart WPF 2D Charts > Tutorials > MVVM). Took me hours to make it through the first step in Tutorial 02b – Creating a SciChartSurface with MVVM due to namespace typo in the tutorial, and again I’m now stuck at the very second step.

I cannot replicate the result in Tutorial 03b – Adding Series to a Chart with MVVM. No error found in the output, no binding error whatsoever, but the line is not visible. Also see the attached image comparing what it should look like in the tutorial and what mine looks like.

The project is a direct copy and paste from the tutorial except for the names. I have also cross checked against the code in GitHub. I’ve attached the project as a zip with the bin and obj folders removed.

I found two other related questions on this forum one being 11 years ago and the other dated 8 years but my recent trial installation encountered the exact same error and I have no way to start testing the charting library in my code.

I followed this tutorial:
https://www.scichart.com/documentation/win/current/webframe.html#Tutorial%2002b%20-%20Creating%20a%20SciChartSurface%20with%20MVVM.html

And I get this this error:
The tag ‘SciChartSurface’ does not exist in XML namespace ‘http://schemas.abtsoftware.co.uk/scichart’

I tried installing through the MSI & Licensing Wizard and I also reinstall the package through NuGet package manager console, and restarting Visual Studio but problem remains.

The SciChart WPF library version: 8.2.0.27935
Visual Studio: Microsoft Visual Studio Community 2022 (64-bit) configured to be x86. Target framework 4.8.

This is very disappointing

I want to configure the chart as shown in the image.
How should I code to implement the same image in SciChart?

https://stackoverflow.com/questions/77752586/reactjs-sweep-line-demo-issue-with-multiple-surfaces-not-updating-simultaneousl

I need to make a demo of a sweep line with multiple surfaces with reactjs, but The problem is that when I choose to show more than 1 surface it only plays on the data on the latest created surface and stops drawing data on the old surfaces.

you can see the example here with the code: https://28zf6p.csb.app/

this is a GIF for the problem:
[in the stack overflow link]

note: the reason I need multiple surfaces is that I want to have the charts draggable with sortableJS to follow the design I got.

How to remove logo of SCI Chart in android.

Hello.
I’m just started to use SciChart and I have a question. How I can mirror XAxis in order to values will be increased from right to left. It is not negative scale but this view is more familiar for users (now I remake the old application). P.S. And be the best if additionally you show me how to make static XAxis with chosen range. I see the example in demo’s “Create Realtime Charts” section (my chart will be real-time too), but my application created via MVVM and I think this example not fully applicable to my case (but I fink after some investigation I will can remake example, but if you help me it be easier).

Axis in ChartControl sets the interval.
XAxis

hello.
I added an OverView and scrollbar below the main chart, referring to the CustomOverviewView example.
Graph and scroll functions work without problems.
I want to show the main chart annotations in the OverView.
How can I solve my problem?
have a good day!