Category: JavaScript

The scichart y axis is displayed as undefined after updating the data in timed interval. The y axis initially shows the value,but after the data is appended to the source, the y axis is shown as undefined in the chart.

I have attached the final scichart image with yaxis as undefined.

In a DateTimeNumericAxis, can I convert the number from VisibleRange to a formatted string HH:MM:SS?
For example, I’d like to convert this x1 to 12/1/1984, 3:00:00 PM, or 15:00:00.

let x1 = this.parentSurface.annotations.getById("hrv").x1;
// x1 =470761200, seconds since 1970.01.01 00:00:00

Thanks.

I am considering applying server-side licensing for my javerScript application.

In the document below, there is a phrase “Our server-side licensing component is written in C++.”
(https://support-dev.scichart.com/index.php?/Knowledgebase/Article/View/17256/42/)

However, there is only asp.net sample code on the provided github.
(https://github.com/ABTSoftware/SciChart.JS.Examples/tree/master/Sandbox/demo-dotnet-server-licensing)

I wonder if there is a sample code implemented in C++ for server-side licensing.

Can you provide c++ sample code?
Also, are there any examples to run on Ubuntu?

I am trying to build my application with Electron. When the Electron application is run, it will open the UI in the browser (not opened with chromium). I created two Electron applications with same codes but with different versions of SciChart (i.e. version 2 and version 3). When I run with the Electron application with SciChart v2, the SciChart can be loaded properly. When when I run the Electron application with SciChart v3, I got error (please refer to the screenshot) and the SciChart cannot be loaded. I am not sure what’s wrong. Do you have any idea?

Hi,
I’m trying to synchronize the pie chart and the line chart in React. I’ve already done this for two line graphs.

They both use the same data table. And I want to know if it’s possible, if when I zoom in on the line chart, it updates the Pie chart with the new range.

Thanks, (sorry for my english ^^)

How to update the text Annotation in JavaScript. I can add the new Text annotation but I can’t update the old text Annotation. whether we have any option in sci chart for JavaScript.

I am trying to add an axis annotation to a heatmap legend. When this annotation is dragged, the color mapping of the heatmap series and the heatmap legend will be changed. How can I modify the colorMap.gradientStops of the heatmap series and the heatmap legend while the chart is running?

I am implementing a heatmap chart and would like to allow users to adjust the color mapping of the heatmap by adding sliders to the heatmap legend (Please refer to the attached screenshot). Does SciChart support color slider for HeatmapLegend?

I have a real time updated chart and users can add annotation to the chart. The position of the annotation will be updated with the chart data. I would like to stop updating the annotation position while user dragging the annotation. So I added a flag (e.g. isDragging) to the annotation dragStarted and dragEnded events. The isDragging flag will be set to true in dragStarted and then set to false in dragEnded. I will check this flag before updating the annotation position.

Here’s the problem, the annotation dragStarted event will be triggered when users do panning in the chart. But the dragEnded will not be triggered in this case. It breaks my plan to stop updating the annotation position as the isDragging will be incorrect. Is it a bug that the annotation dragStarted event (but not the dragEnded event) triggered when panning?

Is it possible, in version 2.2.2404, to have RubberBandXyZoomModifier function like what seems to be the default for v3? So when I’m dragging the box to zoom, if I leave the chart area, the box snaps to the edges of the chart, and upon mouse release, it zooms normally to the box.

I can provide an example:

https://8tunzo.csb.app/ — broken (version 2.2.2404)

https://umvryi.csb.app/ — working (version 3.0.301)

Same exact code

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 { MouseWheelZoomModifier } from "scichart/Charting/ChartModifiers/MouseWheelZoomModifier";
import { RubberBandXyZoomModifier } from "scichart/Charting/ChartModifiers/RubberBandXyZoomModifier";
import { ZoomExtentsModifier } from "scichart/Charting/ChartModifiers/ZoomExtentsModifier";

const dataX = [0, 10, 20, 30, 40, 50];
const dataY = [0, 10, 5, 20, 15, 35];

// eslint-disable-next-line
SciChartSurface.useWasmFromCDN();

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 lineData = new XyDataSeries(wasmContext, {
    xValues: dataX,
    yValues: dataY
  });

  sciChartSurface.renderableSeries.add(
    new FastLineRenderableSeries(wasmContext, { dataSeries: lineData })
  );

  sciChartSurface.chartModifiers.add(new MouseWheelZoomModifier({}));
  sciChartSurface.chartModifiers.add(new RubberBandXyZoomModifier({}));
  sciChartSurface.chartModifiers.add(new ZoomExtentsModifier({}));
}

initSciChart();

Hi!
Currently, I’m using Axis Layout – vertically stacked axes。When I use vertically stacked axes, click on a certain area, can I get on that axis? It’s from click on a certain area, not the series. I know the series can it.
can you give me some help?

I am trying to implement the following functionality requested by our users:

Zoom:
– Only zoom the chart when using CTRL + MouseWheel key
– This is similar to how most browsers behave

Pan/Scroll:
– If no CTRL key is pressed, then pan/scroll
– This is similar to how most browsers behave

Given the above requirement, I started by creating custom modifier by extending YAxisDragModifier.

My code almost works:
– When using CTRL + Mouse Left & Drag, it Scales (zooms) — just like the user wants
– But using CTRL + Mouse Wheel does not do the same — it only Scales (Zooms).

I have uploaded the code at codesandbox.io:
https://codesandbox.io/s/amazing-shape-2ispt0?file=/src/customModifiers.ts

Note that I have not tried to implement this in ZoomPanModifier yet, but would be helpful if you could give me some pointers on getting this feature in there too.

I would appreciate any help I can get and thanks a bunch in advance.

Best Regards,
Sachin Patel.

This is my first time in this forum, and I am analyzing SCIChart. I am planning to use it in my software, but there are some questions I haven’t been able to answer yet.
My software is similar to an IDE, where the user can build their custom applications and run on windows environment, but we also provide an option to save all the interface in html and javascript. Since SCIChart provides not only WPF Charts but also javascript Charts, I would like to know the following:

1- Does the javascript charts have the same functionalities as the wpf charts? XY Charts or Pie charts for example, will they have the same functionalities in WPF and Javascript ?

2- Does the appearence of the charts in WPF and Javascript are the same? Do they look exatcly the same?

I believe these are my biggest doubts so far. Thanks in advance !!

We are having the first experiences with SCIchart. Could someone help with this problem we are experiencing?

[ encore ] ERROR Failed to compile with 1 errors14:42:33 [ encore ]
Module build failed: Module not found: [ encore ]
“./node_modules/scichart/_wasm/scichart2d.wasm” contains a reference
to the file “a”. This file can not be found, please check it for typos
or update it if the file got moved. [ encore ] ERROR in
./resources/js/Pages/Home.vue?vue&type=template&id=6a63e488&scoped=true&ts=true
(./node_modules/unplugin/dist/webpack/loaders/transform.js?unpluginName=unplugin-vue-components!./node_modules/vue-loader/dist/templateLoader.js??ruleSet[1].rules[3]!./node_modules/vue-loader/dist/index.js??ruleSet[0].use[0]!./resources/js/Pages/Home.vue?vue&type=template&id=6a63e488&scoped=true&ts=true)
10:27 Module parse failed: Unexpected token (10:27) File was processed
with these loaders: *
./node_modules/unplugin/dist/webpack/loaders/transform.js *
./node_modules/unplugin/dist/webpack/loaders/transform.js *
./node_modules/vue-loader/dist/templateLoader.js *
./node_modules/vue-loader/dist/index.js You may need an additional
loader to handle the result of these loaders. | }, null, -1 /* HOISTED
*/)) |

export function render(_ctx: any,_cache: any,$props: any,$setup: any,$data: any,$options: any) { | return (_openBlock(),
_createElementBlock(“div”, _hoisted_1, [ | _createElementVNode(“h1”, null, _toDisplayString(_ctx.msg), 1 /* TEXT */),

ERROR in ./node_modules/scichart/_wasm/scichart2d.wasm Module not
found: Error: Can’t resolve ‘a’ in
‘C:\Users\clo\fr\Projeto\chart\App\node_modules\scichart_wasm’

ERROR in ./node_modules/scichart/_wasm/scichart3d.wasm Module not
found: Error: Can’t resolve ‘a’ in
‘C:\Users\clo\fr\Projeto\chart\App\node_modules\scichart_wasm’

webpack compiled with 3 errors

I recently upgraded SciChart from version 2 to version 3.0.266. It was working fine. But I got error (please refer to the attached screenshot) when I try to run my application today. It’s so strange as it worked fine yesterday and I didn’t make any codes change today.

Downloaded latest Licensing Wizard on my Mac M1 however I cannot run it to start my trial of SciChart.JS.

I’m looking at SciChart.JS for financial charting project in a .NET Blazor for analysis only.

As I’ve not been able to get SciChart installed or to try, is it possible to place annotations such as trend lines and boxes onto the chart by me clicking on the chart?

Also, how does indicators work? And can I add my own indicators? Will the algorithms for these indicators be written in JavaScript or can I do this in C# from Blazor?

I attach a screen shot of the problem running the Licensing Wizard.

Any suggestions would be helpful.

Thanks

I try to use this exemple on my PC with (nodejs 8.13.0) and i can’t run this app example. I receive this error:

× ｢wds｣: Invalid configuration object. Webpack has been initialized
using a configuration object that does not match the API schema.

configuration.optimization has an unknown property ‘namedModules’.
These properties are valid:

object { checkWasmTypes?, chunkIds?, concatenateModules?,
emitOnErrors?, flagIncludedChunks?, innerGraph?, mangleExports?,
mangleWasmImports?, mergeDuplicateChunks?, minimize?, minimizer?,
moduleIds?, noEmitOnErrors?, nodeEnv?, portableRecords?,
providedExports?, realContentHash?, removeAvailableModules?,
removeEmptyChunks?, runtimeChunk?, sideEffects?, splitChunks?,
usedExports? }

-> Enables/Disables integrated optimizations. Did you mean optimization.moduleIds: “named” (BREAKING CHANGE since webpack 5)?*

Is there compatiblity problem with nodejs LTS version?
Thans for your response.

I have a live updating chart with multiple traces. After updated SciChart to v3.0.280, I got “Uncaught (in promise) RangeError: Maximum call stack size exceeded” error sometimes when I call XyDataSeries.appendRange(). This error will not be triggered if just initialize the chart and keeps updating the chart data. It seems happening after I modified the visibleRange of x-axis or y-axis. But the error is triggered on the line calling appendRange(). I have no clue for this issue. My codes didn’t change and only updated the SciChart version. Could you find the possible cause of my problem? Please refer to the attached screenshots.

Codes to update the chart data:

    UpdateSuspender.using(sciChartSurfaceRef.current, () => {
        console.time("Time - Update series");
        for (tnum=0; tnum<MAX_TRACE; tnum++) {
            traceObj = tracesInfoObj.current[tnum];
            if (traceSeries.current[tnum] && traceObj.status === "Active") {
                traceSeries.current[tnum]["xyDataSeries"].clear();
                switch (traceObj.type) {
                    case 0:
                        traceSeries.current[tnum]["xyDataSeries"].appendRange(dataX, newSpecData);
                        break;
                    case 1:
                        traceSeries.current[tnum]["xyDataSeries"].appendRange(dataX, newMaxHoldData);
                        break;
                    case 2:
                        traceSeries.current[tnum]["xyDataSeries"].appendRange(dataX, newMinHoldData);
                        break;
                    case 3:
                        traceSeries.current[tnum]["xyDataSeries"].appendRange(dataX, averageData);
                        break;
                }   
            }
        };
        console.timeEnd("Time - Update series");
    });

When hardware acceleration is not enabled from the client side i am getting the follwong error in the console and the chart becomes empty.
Can we have a caetain fallback ui for this error so that when hardware acceleration is disabled we can show some error in the client side instead of frozen screen

I am considering applying server-side licensing for my javerScript application.

In the document below, there is a phrase “Our server-side licensing component is written in C++.”
(https://support.scichart.com/index.php?/Knowledgebase/Article/View/17256/42/)

However, there is only asp.net sample code on the provided github.
(https://github.com/ABTSoftware/SciChart.JS.Examples/tree/master/Sandbox/demo-dotnet-server-licensing)

I wonder if there is a sample code implemented in C++ for server-side licensing.

Can you provide c++ sample code?
Also, are there any examples to run on Ubuntu?

From what I’ve read into chrome’s roadmap, everything seems on track for a webgpu release in May.
Is scichart taking this into account and planning to add webgpu support?
I suspect this would make quite an impact on performance, so it would be a great addition.

Thanks!

Hi,

I’ve been trying to customize the RolloverModifier tooltip content with a vertical chart but am at a loss to try to get the format I need. I’d like to take in all the series info and display them in a tooltip together with a small icon and the y-value next to this.

I was able to do this in the CursorModifier content but unable to do so in the RolloverModifier which is what I really want to use.

I’ve included a CodeSandbox link below showing the custom SVG template and output on the CursorModifier I’d like to use for the RolloverModifier. Is this type of output template possible?

Thanks in advance!

Hi,

I just registered here.
I want to use your tool to create one graph. But licence is too expensive for me. May I create graph during trial mode and use it?
What if trial licence expired? Already created graph will still working or not?

Thanks

has anyone had an issue with this module?

LineSeriesDataLabelProvider

is supposed to be imported like this but is nowhere to be found:

import { LineSeriesDataLabelProvider} from 
 "scichart/Charting/Visuals/RenderableSeries/DataLabels/LineSeriesDataLabelProvider";

I’m taking this as example

https://demo.scichart.com/javascript-chart-metadata

I’m using angular

I am considering applying server-side licensing for my javerScript application.

In the document below, there is a phrase “Our server-side licensing component is written in C++.”
(https://support.scichart.com/index.php?/Knowledgebase/Article/View/17256/42/)

However, there is only asp.net sample code on the provided github.
(https://github.com/ABTSoftware/SciChart.JS.Examples/tree/master/Sandbox/demo-dotnet-server-licensing)

I wonder if there is a sample code implemented in C++ for server-side licensing.

Can you provide c++ sample code?
Also, are there any examples to run on Ubuntu?

The project is developed on SciChart JS.

The x axis is date time numeric and y axis is numeric.

There is a option for the user to select the x axis interval. The interval values are 5 Min, 10 Min, 15 Min, 30 Min, 1 Hour, 6 Hour, 12 Hour, Days, Weeks, Months & Years.

When the user the selects a interval in the select option, the x axis should be updated with the selected interval.

For Example, If the user selects the 5 Min in the select option, then the x axis interval should be 5 Min.

For 5 Min X Axis Interval

16-Jan-2023 07:00
16-Jan-2023 07:05
16-Jan-2023 07:10
16-Jan-2023 07:15
16-Jan-2023 07:20
16-Jan-2023 07:25
16-Jan-2023 07:30

For 1 Hour X Axis Interval

16-Jan-2023 07:00
16-Jan-2023 08:00
16-Jan-2023 09:00
16-Jan-2023 10:00
16-Jan-2023 11:00
16-Jan-2023 12:00
16-Jan-2023 13:00
16-Jan-2023 14:00

So let me know how to change the interval in the x axis (date time numeric) based on the selection.

I have attached the zip file which contains the HTML file.

How can we change the color(Red) of custom box annotation when it is clicked .
thanks

Good afternoon. My team and I are looking at your library to create a depth chart, like here, but have run into a few problems:
1. if we have, for example, a “buySeries” array larger than the “sellSeries” array, the graph is not drawn very nicely.
2. the labels are not drawn correctly when we have too small numbers, I tried to solve the problem with xAxis.textFormatting = ‘0.#####’ or ‘0.00###’, but that doesn’t work for some reason.
3. If we want to add labels while hovering over the chart with showLabel = true , then we get 4 labels, two on yAxis. is it possible to make the buySeries label appear only on the left, for example, and the sellSeries label only on the right? (second screenshot)

The SciChart Legend and Cursor Tooltip (Showed only Y axis value) are not display after changing the graph layout.
I need to show the graph legend and Tooltip for all the Y axis.

The chart should also show the x axis value and y axis value on the Tooltip for more clarity.

Before changing the layout the legend was showing the five series vertically one below the other. But i need to show the five legends in horizontally (One after the another).

I have added the chart definition code. The data is added though Ajax call and code for that ajax call is not added.

I have attached the image for your reference.

I have attached the zip file with the html file.

We are using JavaScript Chart Editable Annotations but we need some more modificaions in that which can enhance this feature in terms of user experience.
Currently when the anonations are loaded they are havinng a fixed shape but we want the annotations to be draggable as soon as they are loaded in the charts whitout any extra clicks,this feature is provided by tradingView charts and we also want to provide the same to our users.
I have attached images and videos for better understanding of the issue.
Hope we can get the solution of this issue asap.

Please refer to the below video link for beter understanding.
https://www.loom.com/share/213b66eb21db44f9ac2457a89563a21a

I am facing a little hurdle in plotting the date value to the chart.

How to add the date to chart x axis and numeric value to the y axis?
Please provide a example to add the date in x axis and numeric value in the y axis.

Please provide a example with one series in the y axis.

I have a requirement to plot the patient vital signs, the date value in x axis and vital signs in y axis.
x – Date when the vital sign is captured
y1, y2, y3, y4, y5 – BP, Heart rate & other vital signs

The model data looks like below.

{“x”:”29-Nov-2022 04:37″,”y1″:”119″,”y2″:”80″,”y3″:”15″,”y4″:”23.6″,”y5″:”86″},
{“x”:”29-Nov-2022 04:38″,”y1″:”119″,”y2″:”80″,”y3″:”15″,”y4″:”23.6″,”y5″:”87″},
{“x”:”29-Nov-2022 04:39″,”y1″:”119″,”y2″:”80″,”y3″:”15″,”y4″:”23.6″,”y5″:”86″}

Hi,

Im working with Scichart JS on a React project and trying to write some tests using Jest.
I managed to start a browser environment with webgl support to run the tests, but I’m having a hard time to provide the .data and .wasm files to this environment.

This is what i’m trying to run:

import {SciChartSurface} from 'scichart/Charting/Visuals/SciChartSurface';

const buildSurface = async () => {
    const {sciChartSurface} = await SciChartSurface.create('test-surface', {
        viewportBorder: {border: 1}
    });
    return {sciChartSurface};
};

it('should build a surface', async () => {
    document.body.innerHTML = `<div id="test-surface"></div>`;
    const response = await buildSurface();
    const {sciChartSurface} = response;
});

and I’m getting lots of warns an errors like:

console.warn    both async and sync fetching of the wasm failed
console.error    Could not load SciChart WebAssembly module.
                    Check your build process and ensure that your scichart2d.wasm, scichart2d.data and scichart2d.js files are from the same version
console.error   Error: Uncaught [Error: NetworkError for: scichart2d.data]
thrown: "Could not load SciChart WebAssembly module.
                    Check your build process and ensure that your scichart2d.wasm, scichart2d.data and scichart2d.js files are from the same version"

Does anyone know how to setup a sufficient environment on jest to successfully build a scichart surface?

I have a chart that allow users to add one BoxAnnotation and multiple CustomAnnotation (a marker). I got error and failed to drag the BoxAnnotation with the following steps:

Step 1: Call the addMarkerAnnotation() to add a CustomAnnotation

const markerSvgString = '<svg height="26" width="18" xmlns="http://www.w3.org/2000/svg">' +
    '<polygon id="SVG_ID" fill="#000" fill-opacity="0.5" stroke="#00fc00" stroke-width="1.5" points="0,12 8,0 16,12 8,24" clip-path="url(#clip_normal)" />' +
    '<clipPath id="clip_normal"><use xlink:href="#SVG_ID"/></clipPath>' +
    '<text x="5" y="16" fill="#00fc00" font-weight="bold" font-size = "12">MARKER_ID</text>' +
'</svg>';

const deltaSvgString = '<svg height="28" width="28" xmlns="http://www.w3.org/2000/svg">' +
    '<polygon id="SVG_ID" fill="#000" fill-opacity="0.5" stroke="#00fc00" stroke-width="1.5" points="0,0 12,24 22,0" clip-path="url(#clip_delta)" />' +
    '<clipPath id="clip_delta"><use xlink:href="#SVG_ID"/></clipPath>' +
    '<text x="5" y="10" fill="#00fc00" font-weight="bold" font-size="10">MARKER_ID</text>' +
'</svg>';

const addMarkerAnnotation = useCallback((markerId, mode, x1, y1) => {   
    x1 = parseFloat(x1);
    y1 = parseFloat(y1);

    if (x1 != null && y1 != null) {
        let svgString;
        const svgId = "markerSvg_" + markerId;

        if (mode.includes("Delta")) {
            const compareMarkerKey = mode.replace("Delta ", "");
            svgString = deltaSvgString.replace(/MARKER_ID/g, (parseInt(markerId)+1) + "-" + compareMarkerKey);
        } else {
            svgString = markerSvgString.replace(/MARKER_ID/g, parseInt(markerId)+1);
        }
        svgString = svgString.replace(/SVG_ID/g, svgId);

        markerAnnotations.current[markerId] = new CustomAnnotation({
            x1,
            y1,
            id: markerId,
            isEditable: true,
            isSelected: true,
            verticalAnchorPoint: EVerticalAnchorPoint.Center,
            horizontalAnchorPoint: EHorizontalAnchorPoint.Center,
            svgString: svgString
        });
        sciChartSurfaceRef.current.annotations.add(markerAnnotations.current[markerId]);
        reorderMarkers(markerId);

        markerAnnotations.current[markerId].dragEnded.handlers.push(() => {
            let annotation = markerAnnotations.current[markerId];
            let freq = annotation.x1 * FREQ_UNITS.KHZ;

            markersInfoSetter.current[markerId](origMarkerInfo => ({...origMarkerInfo, ...{freq: freq.toFixed(numDP.FREQ), power: annotation.y1.toFixed(numDP.POWER)}}));

            if (markersInfoObj.current[markerId].mode !== "Fixed") {
                getMarkerPeak(markerId, markersInfoObj.current[markerId].trace, annotation.x1 * FREQ_UNITS.GHZ);
            }
            reorderMarkers(markerId);
        });
    }
}, [deltaSvgString, markerSvgString, getMarkerPeak, reorderMarkers, numDP]);

Step 2: Call the removeMarkerAnnotation() to remove the CustomAnnotation

const removeMarkerAnnotation = useCallback((markerId) => {
    if (markerAnnotations.current[markerId]) {
        sciChartSurfaceRef.current.annotations.remove(markerAnnotations.current[markerId]);
        markerAnnotations.current[markerId].delete();
        markerAnnotations.current[markerId] = null;
    }
}, []);

Step 3: Call addTriggerAnnotation() to add a BoxAnnotation

const addTriggerAnnotation = useCallback((x1, x2, y2) => {
    x1 = parseFloat(x1);
    x2 = parseFloat(x2);    
    y2 = parseFloat(y2);

    if (x1 != null && x2 != null) {
        console.log("addTriggerAnnotation: ", x1, x2, triggerAnnotation.current, sciChartSurfaceRef.current.annotations);
        if (!triggerAnnotation.current) {
            triggerAnnotation.current = new BoxAnnotation({
                id: "triggerBox",
                fill: "transparent",
                stroke: "#93A3B1",  //#93A3B1   //#6B818C
                strokeThickness: 2,
                xCoordinateMode: ECoordinateMode.DataValue,
                x1: x1,
                x2: x2,
                yCoordinateMode: ECoordinateMode.DataValue,
                y1: minY,
                y2: y2,
                isEditable: true,
                resizeDirections: EXyDirection.XyDirection,     
            });
            sciChartSurfaceRef.current.annotations.add(triggerAnnotation.current);

            triggerAnnotation.current.dragDelta.handlers.push(() => {
                triggerAnnotation.current.y1 = minY;

                const minX =  specSettingsRef.current.start/freqUnits.KHZ;
                const maxX = specSettingsRef.current.stop/freqUnits.KHZ;
                const maxY = specSettingsRef.current.refLevel;

                if (minX != null && maxX != null) {
                    if (triggerAnnotation.current.x1 < minX) {
                        triggerAnnotation.current.x1 = minX;
                    } else if (triggerAnnotation.current.x1 > maxX) {
                        triggerAnnotation.current.x1 = maxX;
                    } else if (triggerAnnotation.current.x2 > maxX) {
                        triggerAnnotation.current.x2 = maxX;
                    } else if (triggerAnnotation.current.x2 < minX) {
                        triggerAnnotation.current.x2 = minX;
                    }
                }

                if (maxY != null) {
                    if (triggerAnnotation.current.y2 < minY) {
                        triggerAnnotation.current.y2 = minY;
                    } else if (triggerAnnotation.current.y2 > maxY) {
                        triggerAnnotation.current.y2 = maxY;
                    }
                }
            });

            triggerAnnotation.current.dragEnded.handlers.push(() => {
                const maxX = specSettingsRef.current.stop/freqUnits.KHZ;
                const x1 = triggerAnnotation.current.x1;
                const x2 = triggerAnnotation.current.x2;
                const y2 = triggerAnnotation.current.y2;

                if (x1 != null && x2 != null && maxX != null) {
                    if (x1 > x2) {
                        triggerAnnotation.current.x1 = x2;
                        triggerAnnotation.current.x2 = x1;
                    } else if (x2 < x1) {
                        triggerAnnotation.current.x1 = x2;
                        triggerAnnotation.current.x2 = x1;
                    } else if (x1 === x2) {
                        if (x2 + xInterval.current <= maxX) {
                            triggerAnnotation.current.x2 = x2 + xInterval.current;
                        } else {
                            triggerAnnotation.current.x1  = x1 - xInterval.current;
                        }
                    }

                    const origStartFreq = parseFloat(triggersRef.current.startFreq);
                    const origStopFreq = parseFloat(triggersRef.current.stopFreq);
                    const newStartFreq = parseFloat((triggerAnnotation.current.x1 * freqUnits.KHZ).toFixed(numDP.FREQ));
                    const newStopFreq = parseFloat((triggerAnnotation.current.x2 * freqUnits.KHZ).toFixed(numDP.FREQ));

                    if (origStartFreq !== newStartFreq || origStopFreq !== newStopFreq) {
                        setTriggers(origObj => ({...origObj, ...{
                            startFreq: newStartFreq, 
                            stopFreq: newStopFreq,
                            level: parseFloat(y2.toFixed(numDP.POWER)),
                        }}));
                    }
                }
            });
        } else {
            updateTriggerAnnotation(x1, x2, y2);
        }
    }
}, [setTriggers, freqUnits.KHZ, numDP.FREQ, numDP.POWER, minY, updateTriggerAnnotation]);

Step 4: Drag the BoxAnnotation. It’s failed to drag the box and got the error “Uncaught TypeError: Cannot read properties of undefined (reading ‘seriesViewRect’)”.

It’s a strange bug as it can only be reproduced with the steps above. With the following steps, I can drag the BoxAnnoation without problem:

Step 1 -> Step 3 -> Step 4
Step 3 -> Step 4
Step 3 -> Step 1 -> Step 2 -> Step 4

Implementation scenario: multiple polylines are displayed. After clicking the polyline, the name of the polyline is displayed in the icon.

Question: I can get the Series Name through the SeriesSelectionModifier now, but I don’t know how to display the Series Name in the chart when the user clicks a polyline. Is there a corresponding API?

Hi,

I have added a data series and also a custom box annotation which is overlapping the data series.
But the question is I am trying to move the box annotation which drag and drop but have to clip on the data series as well.
May I know if is scichart js able to do so? Or best if I just convert it into svg and make it drag and drop will do?

I have a chart in the center of the page and the chart will resize according to the browser window size. When I expand the browser window, the chart will expand to fit the browser size. In this case, the chart grows downward gradually (with animation). How can I remove this animation effect when resizing the chart?

In case it’s related to my style. Here are my markup and style for reference:

//Markup

//Style
.contentPanel {
flex: 1 1 auto;
width: calc(100% – 335px);
max-height: calc(100vh – 108px);
display: flex;
flex-direction: column;
}

.chartContainer {
position: relative;
margin: 10px 0;
display: flex;
flex-direction: column;
flex: 1;
}

.scichart-root {
width: 100%;
height: 100%;
}

Hello, I need to use tooltips to display information to users. However, after using the tooltip, there will be a jam after the tooltip appears and when zooming. How can I optimize the performance.

The following is the code. I use the js example: “Load 500 Series x 500 Points Performance Demo” for transformation

import { NumericAxis } from "scichart/Charting/Visuals/Axis/NumericAxis";
import { FastLineRenderableSeries } from "scichart/Charting/Visuals/RenderableSeries/FastLineRenderableSeries";
import { EllipsePointMarker } from "scichart/Charting/Visuals/PointMarkers/EllipsePointMarker";
import {
  RolloverModifier,
  TRolloverTooltipDataTemplate
} from "scichart/Charting/ChartModifiers/RolloverModifier";
import { ZoomPanModifier } from "scichart/Charting/ChartModifiers/ZoomPanModifier";
import { ZoomExtentsModifier } from "scichart/Charting/ChartModifiers/ZoomExtentsModifier";
import { MouseWheelZoomModifier } from "scichart/Charting/ChartModifiers/MouseWheelZoomModifier";
import { SciChartSurface } from "scichart";
import {
  IXyDataSeriesOptions,
  XyDataSeries
} from "scichart/Charting/Model/XyDataSeries";
import { NumberRange } from "scichart/Core/NumberRange";
import { EAutoRange } from "scichart/types/AutoRange";
import { convertRgbToHexColor } from "scichart/utils/convertColor";
// eslint-disable-next-line
SciChartSurface.useWasmFromCDN();

const divElementId = "scichart-root";

const color = "#368BC1";

const SERIES = 1500;
const POINTS = 188;


const drawExample = async (updateTimeSpans) => {
  const { sciChartSurface, wasmContext } = await SciChartSurface.create(
    divElementId,{ widthAspect: 3, heightAspect: 2}
  );
  const xAxis = new NumericAxis(wasmContext, {
    visibleRange: new NumberRange(0, POINTS),
    autoRange: EAutoRange.Never
});
sciChartSurface.xAxes.add(xAxis);
const dataSeriesArray= new Array(SERIES);;
const rendSeriesArray=new Array(SERIES);
const yAxis = new NumericAxis(wasmContext, {
    visibleRange: new NumberRange(-5000, 5000),
    autoRange: EAutoRange.Never
});
// yAxis.labelProvider.numericFormat = ENumericFormat.Decimal_0;
sciChartSurface.yAxes.add(yAxis);
for (let i = 0; i < SERIES; i++) {
  const dataSeries= new XyDataSeries(wasmContext);
  const rendSeries= new FastLineRenderableSeries(wasmContext, {
      dataSeries,
     stroke: color,
      strokeThickness: 3,
      pointMarker: new EllipsePointMarker(wasmContext, {
        width: 5,
        height: 5,
        strokeThickness: 2,
        fill: "white",
        stroke: color
      })
  });
  dataSeriesArray[i] = dataSeries;
  rendSeriesArray[i] = rendSeries;
sciChartSurface.renderableSeries.add(rendSeries);
}
sciChartSurface.chartModifiers.add(new ZoomExtentsModifier(), new ZoomPanModifier(), new MouseWheelZoomModifier(),new RolloverModifier(wasmContext));
const loadPoints = () => {
  const newTimeSpans=[];

  // Start counting Points generation time
  const generateTimestamp = Date.now();

  const xValuesArray = new Array(SERIES);
  const yValuesArray = new Array(SERIES);
  const strokeArray =  new Array(SERIES);
  for (let i = 0; i < SERIES; i++) {
      // Allocate data arrays
      xValuesArray[i] = new Array(POINTS);
      yValuesArray[i] = new Array(POINTS);

      // Clear data, if any
      dataSeriesArray[i].clear();

      // Generate stroke
      const r = Math.random();
      const g = Math.random();
      const b = Math.random();
      strokeArray[i] = convertRgbToHexColor(r, g, b);

      // Generate points
      let prevYValue = 0;
      for (let j = 0; j < POINTS; j++) {
          const curYValue = Math.random() * 10 - 5;

          xValuesArray[i][j] = j;
          yValuesArray[i][j] = prevYValue + curYValue;

          prevYValue += curYValue;
      }
  }

  // Add the first time span: Generating 1M data points
  newTimeSpans.push({
      title: "Generate 500x500 Data Points",
      durationMs: Date.now() - generateTimestamp
  });

  // Start counting batch append time
  const appendTimestamp = Date.now();
  for (let i = 0; i < SERIES; i++) {
      dataSeriesArray[i].appendRange(xValuesArray[i], yValuesArray[i]);
      rendSeriesArray[i].stroke = strokeArray[i];
  }

  // Add the second time span: Generation of data point
  newTimeSpans.push({
      title: "Append 500x500 Data Points",
      durationMs: Date.now() - appendTimestamp
  });

  // Subscribe to sciChartSurface.rendered event,
  // and calculate time duration between the append and
  // the first frame after it
  const firstFrameTimestamp = Date.now();
  let frameIndex = 0;
  let nextFramesTimestamp;
  const handler = () => {
      if (frameIndex === 0) {
          // Add the third time span: Render the first frame
          newTimeSpans.push({
              title: "Render the frame",
              durationMs: Date.now() - firstFrameTimestamp
          });
          nextFramesTimestamp = Date.now();
      } else {
          // Unsubscribe from sciChartSurface.rendered
          updateTimeSpans(newTimeSpans);
          sciChartSurface.rendered.unsubscribe(handler);

          // Zoom extents at the end of performance measurement
          sciChartSurface.zoomExtents();
      }
      setTimeout(sciChartSurface.invalidateElement, 0);
      // Increment frame index
      frameIndex++;
  };
  sciChartSurface.rendered.subscribe(handler);
};
  loadPoints()
};

drawExample();