Category: JavaScript

I need help to make the SciChart surface grid to always look like squares instead of rectangles(like in the screenshot attached).
Does anyone have solved this yet ?

Hello,

I want to render a base64 image in ScichartJS without actually rendering it in DOM. I saw that you have these guides in WPF:
https://support.scichart.com/index.php?/Knowledgebase/Article/View/17213/34/
https://www.scichart.com/documentation/win/current/webframe.html#Screenshots,_Printing_and_Export_to_XPS.html

However it is difficult to achieve it in Typescript. Is there a guide or any ideas on how to do it? I would appreciate any answer.

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

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 !!

Hello,

I am trying out SciCharts and am looking to recreate the example 3D uniform surface mesh chart example and don’t have a good hold on the architecture yet. I don’t see directions as to which file to paste the example code into. I’m looking at the code example where it creates a “final camera3D camera – schiChart3DBuilder.newCamera3D().build();” and goes from there. (…/webframe.html#The%20Surface%20Mesh%203E%20Chart%20Type.html)

I have the 3D surface created and rendering. I just need to get started to go from there. Thank you.

Working on an application that requires toggling between Linear and Logarithmic scales. I am using the JavaScript version of the library, and I see that there is a LogarithmicNumericAxis available in the WPF version but there is not one currently supported in the JS version.

Curious if there were any recommendations on how to go about hand rolling this type of functionality?

The application is doing realtime streaming of data points so need to be able to update existing values as well as handle incoming values.

Can you please provide an example or documentation on how to change the tooltip style? Is any method to turn off the cursor pointer for a particular data series?

I am getting the alert message on our application and now I got the same message on the https://demo.scichart.com/javascript-line-chart also. It’s not happening all the time. But it’s happening sometimes only on the application.

How to display data labels vertically and support Chinese，As shown in Fig

I have a color heatmap legend that need to update the yAxis range on the fly. The colorMap doesn’t update as expected. Here’s my codes to update the y axis and colorMap min/max of the heatmap legend:

const newRange = new NumberRange(newMin, newMax);
const yAxis = heatmapLegendRef.current.sciChartSurface.yAxes.items[0];
yAxis.majorDelta = newScale;
yAxis.minorDelta = newScale / 5;        
yAxis.visibleRange = newRange;
yAxis.visibleRangeLimit = newRange;
yAxis.zoomExtentsRange = newRange;

colorMapRef.current.minimum = newMin;
colorMapRef.current.maximum = newMax;
heatmapLegendRef.current.colorMap = colorMapRef.current;

The y axis range has been updated. But the colorMap didn’t. It seems that the colorMap of the heatmap legend cannot be changed. Is it true that I can only recreate the heatmap legend if I want to change the colorMap?

I’m a C# developer looking to evaluate working with SciChartJS for a possible future project.

I’ve created a .NET Blazor Project working with JavaScript Interop and I would like to extend the CustomChartModifier2D in TypeScript.

I’ve not used npm to install SciChart into the project, rather I’m using the CDN approach in my _Host.cshtml file.

<script src="https://cdn.jsdelivr.net/npm/[email protected]/index.min.js" crossorigin="anonymous"></script>

I’ve been searching online for a SciChartJS TypeScript definition file so that I can leverage TS Strongly Typed system in my test project.

Is there one? Or do I need to build my own, or even is there an already made example of extending SciChart with TypeScript somewhere I’ve missed?

Thank you

Hi. I’m trying to add 3DChart to my vue project. And I have a question about the configuration. Can I download .data and .wasm files from the CDN.

For 2D charts , I’ve used recomendation of your release v.2.2:
SciChartSurface.useWasmFromCDN()
It works for me. How I can use CDN for SciChart3DSurface?

Hi,
the Tooltip from the rolloverModifier shows for the Open-Values the Label “Open”.

I would like to be able to change that. There might be serveral reasons for that. Maybe the shown data are not “openValues” or the word “open” needs to be translated into another language.

I managed to edit the title of a FastCandlestickRenderableSeries by setting a title and get it into the variable like this:

rolloverTitle = newtitle;
renderableSeries0.rolloverModifierProps.tooltipTitle = rolloverTitle;

unfortunately i did not find a way to set the name/label for the open-,low-,close-, or high-values of this Series.

Can someone give ma a hint how to do this?

Dear Andrew,

As mentioned in the previous question. we are getting ready to implement a comprehensive annotation and labeling functionality to our application. Although I know how to add scalable custom-annotations (your team guided us with the implementation in the past), an important part of of annotation functionality is. ability to edit the annotations. But I am having trouble accessing and interacting the the annotations.

How can I access the svg polygon nodes from the custom annotation and drag and move them? I have attched a video to show the existing functionality.

https://youtu.be/AkysJ2R3TyE1

Best,
Pramod

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

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");
    });

Hi Andrew,

I have 2 independent questions,

Q1.
I have been working with uniform heatmap and I need a way to fix the aspect ratio to 1, for all resize, zoom events, is there an option in heatmap to fix an aspect ration? Please see the attached video
https://youtu.be/obhH6KLExYw

Q2.
I am trying to implement a lasso select method to select and highlight the heatmap data. I did not find lasso select in the documentation hence I went ahead and implemented my own method.

I am drawing an svg using D3 (offsetX and offsetY variables) and then adding it to the annotation as you will see in the video and trying to get all the hitTest data inside the lasso.

If I use the customAnnotation then heatmap is able to draw correct size and location of the SVG
customAnnotation:
https://youtu.be/gL34sAbxYSE

But it does not pan and zoom with the plot data. after looking through documentation I came across OverviewCustomResizableAnnotation which seems designed for zooming and panning with the data.

But while using the OverviewCustomResizableAnnotation the SVG size keeps changing during the update and is not located at the correct location relative to the data.

sciChartSurfaceRef.current.annotations.add(
new OverviewCustomResizableAnnotation({
id: "lassoSVG",
x1: shortestXinData,
y1: shortestYinData,
isEditable: false,
isSelected: false,
yCoordinateMode: ECoordinateMode.DataValue,
xCoordinateMode: ECoordinateMode.DataValue,
verticalAnchorPoint: EVerticalAnchorPoint.Top,
horizontalAnchorPoint: EHorizontalAnchorPoint.Left,
svgString: new XMLSerializer().serializeToString(svg.node())
})
)
OverviewCustomResizableAnnotation:
https://youtu.be/-AOJ9V3l-xI

Thanks,

Pramod

Hi,

In my application I am using two charts for represent different values. I am using LegendModifier on the first chart. Is it possible when i uncheck the series on first chart and the same color series on second chart also need to hide from the second chart. Any event callback function available in LegendModifier ?

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.

Hi,

EDataLabelSkipMode Customization is possible with some time range limit?
When i checked the documentation saw the options to skip the label for overlaping. Is it possible can add some index to skip the values. Eg: for Time chart One value is displayed in the chart at 10:30:00. So if i add some index value to skip the next 1 min data. So based on skip index next available value can ba displayed in chart. (10:31:00 or next available value). Can you implement this option to skip ?