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Hi, I’m looking for some pointers on how to implement the following:

• User draws a selection on the chart (similar to rubber band modifier)
• Annotation is drawn on the chart conforming to the users selection
• Annotation is fixed relative to the data point (e.g. will scroll is the chart is panned etc)

Many thanks

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??

I was used fifo(scrolling) chart in wpf scichart.

But.

I could not found fifo option in js scichart.

Maybe because there is no fifo option, if there is a lot of data accumulated, the chart is slow and cannot be used.

Can I use fifo(scrolling) chart in js scichart?

I was just going through the tutorial and had my project initializing the graph and drawing a few datapoints. Out of the blue after recently building with no new changes, I’ve been getting hit with the attached message. I’ve even tried deleting the scichart sub-folder within node_modules and reinstalling scichart via npm to no avail.

Hi there,

I would like to use a column chart with labels. Our client tends to use really long names for these labels, so I was wondering if it is possible that these labels wrap. I could find no property in the docs or source that achieves this. The attached screenshot shows the current (and undesired) rendering.

The current behavior seems to be that labels in between are hidden when longer labels overlap them. Is this a configurable property? In our case, the labels may never be hidden.

Kind regards,
Tim Havinga

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
    });

Scenario: user selects an area of a heatmap chart using a box annotation via a mouse drag.

I have created a custom modifier to draw the box annotation. I’ve used this as the basis: SimpleDataPointSelectionModifier.ts

My question is: how to I get the X axis start + end values and the Y axis start + end values based on the area of the annotation/mouse coordinates.

Thanks

Hello, I`d like to ask u about cursor view. As default cursor I want use crosshair and as move grabbing as showed in attachment. How can I do that ?

Hi

Is there any way to Create an image (as png) of an scichart surface and store it in Clipboard for later use in javascript?

Hi there,

Do you support colour legend for Heatmap in Java Script? Can you please point me to where it is documented if you do.

Thank you

Cant display any chart when init by SciChartSurface.create(HtmlElementId), how can I fix it ?

i cant draw any chart.
just this ..
i used demo code

Hello! Can you help me with creating footprint chart. In documentation and examples I didn`t find way how to do that. How can I create it ?

can i use scichart in vue2.0 or 3.0?

I think this question has come up before, but is it possible to render a logarithmic axis in the JS library? If not, is this on the roadmap (and when)?

Is there a way to update the entire data series instead of a particular y value at an index ?

https://www.scichart.com/documentation/js/current/typedoc/classes/xydataseries.html#update

Hello

I have a use case where annotations are draggable and on drag i am making api call to fetch updated data and resetting the the DataSeries.

I am clearing annotations once i get updated data but it is just clearing the svg annotation nodes from dom but not the hit test context (point focus) on wasm side.

Please look at the attached screenshot and suggest something

Thanks
Vamsi

I wanted to use a stepline-box chart in my javascript applications for ELD, I failed to find out a similar box graph in the javascript chart section. The graph I have really looking for is attached here.
Could anyone please help me out?

Hi there,

I am using scichart on a web application to plot 4 different plots simultaneously ( three using FastBandRenderableSeries and one using UniformHeatmapDataSeries).

When running on local environment everything works as expected (browser is very responsive) but when I push it to the production website it lags and my computer seems to be having hard time with the browser. I am still debugging it but thought to ask in case you have any recommendations ? Do you have performance related tips you can share?

I was reading on other posts about SciChartSurface.RenderPriority but it does not seem to exist in JS Scichart. Is there a workaround you can suggest?

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.

I want to build a column chart but I got the following error:

ERROR TypeError: Cannot read property ‘append’ of undefined

The error happened in line #42.

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.updateData();
                });
                this.sciChartInit();
            }   

updateData(){
    var phaseNum1 = [];
    var xData = [];
    for (let x = 1; x < this.numberOfOutput; x++) {
        if (this.ampSource.data != null && this.ampSource.data[x-1] != null) {
            phaseNum1[x - 1] = parseFloat(this.ampSource.data[x - 1].voltage1);
            xData[x - 1] = x;
            if (!isNaN(phaseNum1[x - 1])) {
                this.dataSeries1.append(x,x);
            } else {
                console.log("No num");
            }
        }
    }
}       

async sciChartInit() {

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

    var phaseNum1 = [];
    var xData = [];
    this.dataSeries1 = new XyDataSeries(wasmContext);
    for (let x = 1; x < this.numberOfOutput; x++) {
        this.dataSeries1.append(x, x);
    }

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

    const rendSeries1 = new StackedColumnRenderableSeries(wasmContext);
    rendSeries1.fill = "#dc443f";
    rendSeries1.stroke = "green";
    rendSeries1.strokeThickness = 1;
    rendSeries1.dataSeries = this.dataSeries1;
    rendSeries1.stackedGroupId = "one";

    const verticallyStackedColumnCollection = new StackedColumnCollection(wasmContext);
    verticallyStackedColumnCollection.dataPointWidth = 0.5;
    verticallyStackedColumnCollection.add(rendSeries1);
    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 LegendModifier({
            placement: ELegendPlacement.TopRight,
            orientation: ELegendOrientation.Horizontal,
            showLegend: true,
            showCheckboxes: true,
            showSeriesMarkers: true
        })
    );
    return { wasmContext, sciChartSurface };
}}

I don’t understand what is undefined and why.

Thank you.

Hi,
I am trying to get my chart to scroll together with my other HTML elements but have not been successful. Referring to the screenshot attached, if I were to disable the position:absolute style the chart is then able to scroll with the HTML elements if not, whenever I scroll the other HTML elements would scroll but the Chart will stay in its position.

Is there property that I can set on the chart to disable the absolute position?

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

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

Dear team. We have a need to draw footprint chart, but your library didnt’t have opportunity to draw it. It will be good if you help us with recommendations in which direction we should move to build it. Thanks you a lot !

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

I have been trying to integrate Scichart JS in my Ionic 5 (Capacitor) application, but didn’t get succeed on that. I really need help on that

I want to use my custom image as a background for SciChart js.
I tried to put background-image to body of the page.
Then I enabled transparent background via:

sciChartSurface.backgroundCompletelyTransparentEnabled = true;

But it doesn’t work. It does nothing.
Then I tried to put transparent background to SciChart:

sciChartSurface.background = "#00000000";

But it doesn’t work as well. Chart completely disappears in this case.

How can I put my image as a background for SciChart?

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

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.

I need to set VerticalLineAnnotations without a label.

My setting is:

const verticalLineAnnotation = new VerticalLineAnnotation({
stroke: "ff2626",
strokeThickness: 3,
x1: -1,
showLabel: false,
isEditable: true,
isHidden: true
});

When the user needs the annotation the VerticalLineAnnotation is made visible by setting isHidden = false. After setting it to false an exception is thrown with following content: “TypeError: Cannot read properties of undefined (reading ‘left’)”.