Personalize Your Highcharts Legend with Custom HTML

Currently, I am working on a project with a highcharts graph where I need to gather data from the user regarding each line displayed. My goal is to include a text input box next to each label in the legend that relates to the series name. Once the user enters the information, I plan to have a button that will submit the collected data to the server.

I attempted to use a labelFormatter function, but it seems to only support plain text and does not allow for input boxes.

Is there a simple way to achieve this using highcharts, or should I consider writing my own function utilizing highchart event hooks to insert the desired HTML elements?

Any assistance on this matter would be greatly appreciated. Thank you!

javascripthighcharts

Answer №1

To enable HTML in the Highcharts legend, you can use the useHTML option.

legend: {
    useHTML: true,
    labelFormatter: function () {
        return '<span title="' + this.name + '">' + this.name + '</span>';
    }
}

http://api.highcharts.com/highcharts/legend.useHTML

Answer №2

If you require functioning HTML in various types of labels/tooltips, it is necessary to enable the useHTML attribute as true (even though this detail is not included in the documentation). While this may lead to some positioning issues, it allows for rendering any HTML content.

For instance: 

plotOptions : {
   series: {
     dataLabels: {
       useHTML: true
     }
   }
}

Answer №3

Check out this demonstration. http://jsfiddle.net/RTDVB/ Incorporate your data into the loadedData portion and specify in the getItemsDescription function what content you wish to display.

Answer №4

After grappling with this issue for some time, I finally devised a unique "fix". While it may not be the most elegant solution, I felt compelled to share it here in case it could help others facing a similar dilemma.

My approach involved extending the highstock source code and adapting their showCheckbox functionality to create a showTextbox feature. Although this solution is rather specific to my needs, it effectively resolved the problem at hand. Additionally, I had to tweak the onmousedown handler to allow seamless focus transfer to the text box upon clicking.

The text boxes are strategically positioned in HTML to align with the legend items, as the legend itself is incorporated within the SVG of the graph, posing challenges for integrating other HTML elements.

If you're interested in obtaining the full code implementation, feel free to drop a comment requesting it, and I'll gladly share it with you.

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