Questions

Hi,

I have an issue with Rollover modifier line styling in sci chart using java script. we need the horizontal dashed line for the rollover modifier. How is it possible?

Do you have Fibonacci Arcs and Retracements in JavaScript charts? If yes could you please provide a sample to build them.

I am working on a proof of concept for our company to move some of our desktop apps to the web. We use SciChart WPF in our desktop apps so we are going with SciChart.JS for the web apps. Is it possible to stack the FastLineRenderableSeries in SciChart.JS like we do in WPF?

Edit: Found the answer just after I posted this question.

sciChartSurface.layoutManager.leftOuterAxesLayoutStrategy = new LeftAlignedOuterVerticallyStackedAxisLayoutStrategy();

Looking to try and “link” two timeseries charts when either one is zoomed. The link aspect would be updating the other chart to have the same visible range as the zoomed chart.

Each chart has its visibleRange property updated in response to separate socket events, that happen at similar intervals but different.

Originally, was hoping to have something similar to the onZoomExtents method that fires a callback that would allow me to grab the latest min/max of the visibleRangeProperty of the xAxes to then update the other chart.

Any suggestions on how I could go about doing this?

And if it is not clear what I am talking about I can provide some code snippets.

import { MouseWheelZoomModifier } from "scichart/Charting/ChartModifiers/MouseWheelZoomModifier";
import { ZoomExtentsModifier } from "scichart/Charting/ChartModifiers/ZoomExtentsModifier";
import { ZoomPanModifier } from "scichart/Charting/ChartModifiers/ZoomPanModifier";
import { XyDataSeries } from "scichart/Charting/Model/XyDataSeries";
import { NumericAxis } from "scichart/Charting/Visuals/Axis/NumericAxis";
import { FastLineRenderableSeries } from "scichart/Charting/Visuals/RenderableSeries/FastLineRenderableSeries";
import { SciChartSurface } from "scichart/Charting/Visuals/SciChartSurface";
import { NumberRange } from "scichart/Core/NumberRange";
import { Point } from "scichart/Core/Point";
import { EAnimationType } from "scichart/types/AnimationType";
import { ShadowEffect } from "scichart/Charting/Visuals/RenderableSeries/ShadowEffect";
import { SciChartJSLightTheme } from "scichart/Charting/Themes/SciChartJSLightTheme";
import { SciChartJSDarkTheme } from "scichart/Charting/Themes/SciChartJSDarkTheme";
import { EAutoRange } from "scichart/types/AutoRange";

async function initSciChart() {
  const { sciChartSurface, wasmContext } = await SciChartSurface.create(
    "scichart-root"
  );
  // Create an X,Y Axis and add to the chart
  const xAxis = new NumericAxis(wasmContext);
  const yAxis = new NumericAxis(wasmContext, {visibleRange: new NumberRange(0, 11)});
  //const yAxis = new NumericAxis(wasmContext, {visibleRange: new NumberRange(0, 10)});
  // , {autoRange: EAutoRange.Once}

  sciChartSurface.xAxes.add(xAxis);
  sciChartSurface.yAxes.add(yAxis);

  // Create some data and set on a line series
  const xyData = new XyDataSeries(wasmContext);
  for (let i = 0; i < 250; i++) {
    xyData.append(i, 0);
    // xyData.append(i, Math.sin(i * 0.1));
  }
  sciChartSurface.renderableSeries.add(
    new FastLineRenderableSeries(wasmContext, { dataSeries: xyData })
  );
}

initSciChart();

Visible Range is not working correctly. I found two cases getting the issue.

Case 1: visibleRange: new NumberRange(0, 10) -> if the values are 0 and 10 then the chart showing auto mode.
Case 2: xyData.append(i, 0) -> if all the values are 0 then its showing line on middle even the value is 0 to any number.

Please check the cases has some issues…

Hi, Custom tooltip is not working on v2.0.2179.
Its working on v2.0.2146. Can you please check the issue..

import { SciChartSurface } from "scichart/Charting/Visuals/SciChartSurface";
import { NumericAxis } from "scichart/Charting/Visuals/Axis/NumericAxis";
import { XyDataSeries } from "scichart/Charting/Model/XyDataSeries";
import { FastLineRenderableSeries } from "scichart/Charting/Visuals/RenderableSeries/FastLineRenderableSeries";
import { RangeSelectionChartModifier } from "./RangeSelectionChartModifier";
import { RubberBandXyZoomModifier } from "scichart/Charting/ChartModifiers/RubberBandXyZoomModifier";
import { MouseWheelZoomModifier } from "scichart/Charting/ChartModifiers/MouseWheelZoomModifier";
import { EXyDirection } from "scichart/types/XyDirection";
import { ZoomExtentsModifier } from "scichart/Charting/ChartModifiers/ZoomExtentsModifier";
import { EClipMode } from "scichart/Charting/Visuals/Axis/AxisBase2D";
import { MouseButtonZoomChartModifier } from "./MouseButtonZoomChartModifier";
import { SeriesInfo } from "scichart/Charting/Model/ChartData/SeriesInfo";
import { CursorTooltipSvgAnnotation } from "scichart/Charting/Visuals/Annotations/CursorTooltipSvgAnnotation";
import { CursorModifier } from "scichart/Charting/ChartModifiers/CursorModifier";



async function initSciChart() {
    const { sciChartSurface, wasmContext } = await SciChartSurface.create("scichart-root");

      const xAxis = new NumericAxis(wasmContext);
      const yAxis = new NumericAxis(wasmContext);

      sciChartSurface.xAxes.add(xAxis);
      sciChartSurface.yAxes.add(yAxis);

      const xyData = new XyDataSeries(wasmContext);
      for (let i = 0; i < 250; i++) {
        xyData.append(i, Math.sin(i * 0.1));
      }
      sciChartSurface.renderableSeries.add(
        new FastLineRenderableSeries(wasmContext, { dataSeries: xyData })
      );

      const cursorModifier = new CursorModifier({
        crosshairStrokeThickness: 1,
        showTooltip: true,
        showAxisLabels: false,
        crosshairStroke: "transparent",
      });
      cursorModifier.tooltipSvgTemplate = (seriesInfo, svgAnnotation) => {
        let rowString = "";
        seriesInfo.forEach(() => {
          rowString = rowString + `<tspan x="8" dy="1.2em" fill="red">Test : 123</tspan>`;  
        });

        const string = `<svg width="300" height="33" x="0"><defs>
            <filter id="id_1610011455082" x="0" y="0" width="200%" height="200%">
            <feOffset result="offOut" in="SourceAlpha" dx="3" dy="3"></feOffset>
            <feGaussianBlur result="blurOut" in="offOut" stdDeviation="3"></feGaussianBlur>
            <feBlend in="SourceGraphic" in2="blurOut" mode="normal"></feBlend>
            </filter>
            </defs>
            <rect rx="4" ry="4" width="95%" height="90%" style="stroke-width:1;stroke:'#ffffff'}"></rect>
            <svg width="100%"><text x="8" y="3" font-size="13" font-family="Verdana" dy="0">`;

        svgAnnotation.xCoordShift = 5;
        svgAnnotation.yCoordShift = 5;
        return string + rowString + `</text></svg></svg>`;
      };
      sciChartSurface.chartModifiers.add(
        cursorModifier
      );


      const mouseWheelModifier = new MouseWheelZoomModifier();
      mouseWheelModifier.modifierMouseWheel = args => {
        const delta = args.mouseWheelDelta * 0.1;
        mouseWheelModifier.parentSurface.xAxes.asArray().forEach(x => {
          x.scroll(delta, EClipMode.None);
        });
      };
      sciChartSurface.chartModifiers.add(
        new RubberBandXyZoomModifier({ xyDirection: EXyDirection.XDirection })
      );
      sciChartSurface.chartModifiers.add(mouseWheelModifier);
      sciChartSurface.chartModifiers.add(new ZoomExtentsModifier());
  }

   initSciChart();

Is it possible to add the text to the chart and display it to the chart?

Please see the attached image. In our application its a realtime chart. need to add the text based on x axis. it should be moved based on zoom and pan.

Is it possible to display the values always on the chart.

I am wondering if there may be some guidance on how to configure the styles for the SciChart.js chart instance in a React application to be able to handle dynamic changes to the height value.

The scenario is that the chart and wasm context are being saved in refs, so that the component the chart exists within does not rerender. Data is being consumed via a web socket, and streaming realtime data.

All that is well and good, but trying to implement a new feature request where the height of the chart changes dynamically, similar to an accordion style where the chart may have a full view, a split view, or no view (92vh, 46vh, 0vh)

I am finding that my css styles are not applying, or frustratingly will apply seemingly at random and other times not apply even though the underlying code remains the same. I tried to override, or at least alter, the position absolute styles of the canvas, by wrapping it in a parent element with position relative, which works to keep the height and width of the chart as desired, but the aspect ratio seems to falter and the chart axes are blurred and illegible.

I’m sure this would be a great instance of a picture says a 1000 words, and I am nearing a 1000 words. Will try to attach a codepen/ example that demonstrates the issue I am experiencing.

If there are any tips or tricks you would recommend please advise

When I’m viewing a chart from mobile browser, quality of graphics is very low.
I can see pixels and some blurred graphics on mobile browsers. But it’s completely ok on the desktop browsers.

I reproduced it with an official example:
https://demo.scichart.com/javascript-realtime-ticking-stock-charts

It’s impossible to zoom a candlestick chart (other types as well) on mobile browsers & WebViews.
I’m trying to use pinch-to-zoom with my fingers on chart, but it doesn’t react on it. Only sliding on the left & right is possible.

I’ve even tried demo from documentation:
https://demo.scichart.com/javascript-realtime-ticking-stock-charts

The same is with my chart as well

How can I fix it?
Thank you

I want to build a Stacked Column Side by Side Chart by referring to the reference here.

However, the program could not enter line #41. It just stuck there and the column chart could not be shown.

My code:

export class OutputAmplitudeComponent implements OnInit, OnDestroy {

constructor(@Inject(SETTING_SERVICE) private settingService: SettingService, private cdr: ChangeDetectorRef) {}

ngOnInit() {        
                this.settingService.registerSetting(HarmonicAmpSetting).pipe(takeUntil(this.ngUnsubHarmonicData)).subscribe(setting => {
                    const OutputAmplitudeData = setting.value;

                    for (let x = 1; x < this.numberOfOutput; x++) {
                        if (this.OutputMode === 'Voltage') {
                            if (phaseNum === 1) {
                                this.ampSource.data[x-1].voltage1 = OutputAmplitudeData[x];
                            } else if (phaseNum === 2) {
                                this.ampSource.data[x-1].voltage2 = OutputAmplitudeData[x];
                            } else if (phaseNum === 3) {
                                this.ampSource.data[x-1].voltage3 = OutputAmplitudeData[x]; 
                            }
                        } else if (this.OutputMode === 'Current') {
                            if (phaseNum === 1) {
                                this.ampSource.data[x-1].current1 = OutputAmplitudeData[x];
                            } else if (phaseNum === 2) {
                                this.ampSource.data[x-1].current2 = OutputAmplitudeData[x];
                            } else if (phaseNum === 3) {
                                this.ampSource.data[x-1].current3 = OutputAmplitudeData[x];
                            }
                        }
                        this.sciChartInit(x);
                    }   
                });
            }   


async sciChartInit(x:number) {

    var phase1 = parseFloat(this.ampSource.data[x-1].voltage1);
    var phase2 = parseFloat(this.ampSource.data[x-1].voltage2);
    var phase3 = parseFloat(this.ampSource.data[x-1].voltage3);

    //stuck here

    const { wasmContext, sciChartSurface } = await SciChartSurface.create("chart");

    const xAxis = new NumericAxis(wasmContext);
    sciChartSurface.xAxes.add(xAxis);
    const yAxis = new NumericAxis(wasmContext);
    sciChartSurface.yAxes.add(yAxis);

    const dataSeries1 = new XyDataSeries(wasmContext, { xValues:[x], yValues:[phase1], dataSeriesName: "Phase 1" });
    const dataSeries2 = new XyDataSeries(wasmContext, { xValues:[x], yValues:[phase2], dataSeriesName: "Phase 2" });
    const dataSeries3 = new XyDataSeries(wasmContext, { xValues:[x], yValues:[phase3], dataSeriesName: "Phase 3" });

    const rendSeries1 = new StackedColumnRenderableSeries(wasmContext);
    rendSeries1.fill = "#dc443f";
    rendSeries1.stroke = "black";
    rendSeries1.strokeThickness = 1;
    rendSeries1.dataSeries = dataSeries1;
    rendSeries1.rolloverModifierProps.markerColor = "#b83735";
    rendSeries1.rolloverModifierProps.tooltipColor = "#dc443f";
    rendSeries1.rolloverModifierProps.tooltipTextColor = "#fff";
    rendSeries1.stackedGroupId = "one";

    const rendSeries2 = new StackedColumnRenderableSeries(wasmContext);
    rendSeries2.fill = "#aad34f";
    rendSeries2.stroke = "black";
    rendSeries2.strokeThickness = 1;
    rendSeries2.dataSeries = dataSeries2;
    rendSeries2.rolloverModifierProps.markerColor = "#87a73e";
    rendSeries2.rolloverModifierProps.tooltipColor = "#aad34f";
    rendSeries2.rolloverModifierProps.tooltipTextColor = "#000";
    rendSeries2.stackedGroupId = "two";

    const rendSeries3 = new StackedColumnRenderableSeries(wasmContext);
    rendSeries3.fill = "#8562b4";
    rendSeries3.stroke = "black";
    rendSeries3.strokeThickness = 1;
    rendSeries3.dataSeries = dataSeries3;
    rendSeries3.rolloverModifierProps.markerColor = "#715195";
    rendSeries3.rolloverModifierProps.tooltipColor = "#8562b4";
    rendSeries3.rolloverModifierProps.tooltipTextColor = "#fff";
    rendSeries3.stackedGroupId = "three";

    const verticallyStackedColumnCollection = new StackedColumnCollection(wasmContext);
    verticallyStackedColumnCollection.dataPointWidth = 0.5;
    verticallyStackedColumnCollection.add(rendSeries1, rendSeries2, rendSeries3);
    verticallyStackedColumnCollection.animation = new ScaleAnimation({ duration: 1000, fadeEffect: true });

    sciChartSurface.renderableSeries.add(verticallyStackedColumnCollection);

    sciChartSurface.chartModifiers.add(new ZoomExtentsModifier(), new ZoomPanModifier(), new MouseWheelZoomModifier());

    sciChartSurface.zoomExtents();

    sciChartSurface.chartModifiers.add(new RolloverModifier({ rolloverLineStroke: "#228B22" }));
    sciChartSurface.chartModifiers.add(
        new LegendModifier({
            placement: ELegendPlacement.TopRight,
            orientation: ELegendOrientation.Horizontal,
            showLegend: true,
            showCheckboxes: true,
            showSeriesMarkers: true
        })
    );
    return { wasmContext, sciChartSurface };
} }

.
.
The data needed in the chart is identified and no error is shown.
Any idea on the solution?

Thank you.

Hi,
Unsorted xValues is possible on SCI Chart? I tried with dataIsSortedInX: false and isSorted: false on dataSeries, But its not showing the correct range.

eg:

 new XyDataSeries(wasmContext, {
        dataSeriesName: "Line Series",
        xValues: [0,10,20,13,54,15,26,17,18,19],
        yValues: [0,1,5,1,20,5,1,8,9,3],
    dataIsSortedInX: false
    });

Hi,

I am getting console error and page is crashing and reloading the page.

Hi,

Currently when we scroll the mouse pointer the zoom level is increasing/decreasing and when we click and drag the pan the chart. I want is when we scroll the chart should change the visible range (Pan chart), and clicking and selecting the area need to zoom like RubberBandXyZoomModifier. But I need to zoom only the X axis. Y axis should be the same as before zoom. Is this possible with SCI chart??

Hi,
sciChartSurface.chartModifiers.clear() is getting error on the application. Its working on previous version and getting error on 1.4.1557.

RenderableSeries Hit-Test is not working as expected. Some bugs on the the RenderableSeries Hit-Test. Distance between two points are less then its working most of the time and getting the isHit variable getting true. But the distance is high then the lines near to the point only getting the isHit true. I am attaching the image when the red marked area is working fine and the blue marked area not working.

pointMarker max and min values marker are cropped when autoRange is enabled. Check the attached image.

If the y axis values are same then the lines are not visible on the chart and the labels are also not visible on the chart. Can you draw the lines on the middle of the chart to get more visible?

async initTrack() {
  const { wasmContext, sciChartSurface } = await SciChartSurface.create(
    "chart" + this.element
  );
  sciChartSurface.xAxes.add(
    new NumericAxis(wasmContext, { axisAlignment: EAxisAlignment.Top })
  );
  sciChartSurface.yAxes.add(
    new NumericAxis(wasmContext, {
      axisAlignment: EAxisAlignment.Left
    })
  );

  const dataSeries = new XyDataSeries(wasmContext);
  for (let i = 0; i <= 1000; i++) {
    dataSeries.append(i, 10);
  }

  const rendSeries = new FastLineRenderableSeries(wasmContext, {
    dataSeries: dataSeries,
    strokeThickness: 1,
    stroke: "red"
  });
  sciChartSurface.renderableSeries.add(rendSeries);
  sciChartSurface.chartModifiers.add(cursorModifier);

  return { wasmContext, sciChartSurface };
}

I am getting a console error when using isVisible: false to the FastLineRenderableSeries or FastMountainRenderableSeries and CursorModifier together.

  const { wasmContext, sciChartSurface } = await SciChartSurface.create(
    "chart" + this.element
  );
  sciChartSurface.xAxes.add(
    new NumericAxis(wasmContext, { axisAlignment: EAxisAlignment.Top })
  );
  sciChartSurface.yAxes.add(
    new NumericAxis(wasmContext, {
      axisAlignment: EAxisAlignment.Left,
      growBy: new NumberRange(0.4, 0.4)
    })
  );

  const dataSeries = new XyDataSeries(wasmContext);
  const POINTS = 1000;
  const STEP = (3 * Math.PI) / POINTS;
  for (let i = 0; i <= 1000; i++) {
    const k = 1 - i / 2000;
    dataSeries.append(i, Math.sin(i * STEP) * k * 0.7);
  }

  const rendSeries = new FastLineRenderableSeries(wasmContext, {
    dataSeries: dataSeries,
    strokeThickness: 1,
    stroke: "red",
    isVisible: false
  });
  sciChartSurface.renderableSeries.add(rendSeries);
  // sciChartSurface.background = this.color;

  sciChartSurface.chartModifiers.add(
    new ZoomExtentsModifier(),
    new ZoomPanModifier(),
    new MouseWheelZoomModifier()
  );

  // Add CursorModifier behavior
  const cursorModifier = new CursorModifier({
    crosshairStroke: "#ff6600",
    crosshairStrokeThickness: 1,
    tooltipContainerBackground: "#000",
    tooltipTextStroke: "#ff6600",
    showTooltip: true,
    axisLabelsFill: "#b36200",
    axisLabelsStroke: "#fff"
  });
  sciChartSurface.chartModifiers.add(cursorModifier);

  sciChartSurface.zoomExtents();
  return { wasmContext, sciChartSurface };

I am getting a console error when using isVisible: false to the FastLineRenderableSeries or FastMountainRenderableSeries and CursorModifier together.

Multiple instances of sci chart any appearance changes reflecting on other instances. When I changed the background of one instance the same is reflected in the other instance. I have updated with createSingle to resolve this issue, But i am getting one alert when using createSingle.

On Vertical chart Label overlapping on smaller height. I have tried maxAutoTicks also and on the lower height, it’s getting one error. This error is occurring when the width is 0 sometimes. Can you please check this issues?

On the vertical chart custom tooltipSvgTemplate seriesInfo isHit returns false always. Its working fine on the normal chart. Can you please check this issue is on verticle chart.

Remove the white spaces on the chart when we using drawLabels: false. I am using multiple x-axes and no of x-axis increase the empty white space on the x-axis is also increasing.

Hello,
I am trying to make an annotation draggable. I tried setting the isEditable property to true, but nothing happened. I can’t find the right documentation for draggable annotations . My code for creating the Annotation it’s below:

sciChartSurface.annotations.add(new LineAnnotation({
    stroke: "#279B27", strokeThickness: 3,
    xCoordinateMode: ECoordinateMode.DataValue,
    x1: 0,
    x2: 0,
    yCoordinateMode: ECoordinateMode.Relative,
    y1: 0,
    y2: 1,
    isEditable: true,
}));

Some users have reported an error when importing SciChart.js into a TypeScript or JavaScript application:

TS1261: Already included file name ‘C:...\SciChartSurface.d.ts’ differs from file name ‘C:/…/node_modules/scichart/charting/
Visuals/Axis/SciChartSurface.d.ts’ only in casing.

Solution below…

The value of SciChart in Silverlight is the browser hosting capability. With Silveright on its way out, there appears to be no replacement for SciChart in a browser. However, there is a very good public domain project called Fayde that has re-implemented the Mono Moonlight code as Typescript. Fayde lets you port C#/XAML to Javascript surprisingly easily.

Have you looked at Fayde, and do you foresee a (possibly stripped-down) SciChart version for Fayde?

Fayde: https://wsick.github.io/Fayde/