FIXED: How do I add a custom event for a Bar chart (or any type of chart)? - Official support forum

Soujanya · 2020-12-07T17:38:04+00:00

Hi Team Please let me know how to add doubleclick event to bar chart or any type of chart Yours Sincerely Soujanya.

About

RGraph is a JavaScript charts library based on HTML5 SVG and canvas. RGraph is mature (over 18 years old) and has a wealth of features making it an ideal choice to use for showing charts on your website.

Version 7.11

Version 7.11 (released in March 2026) is the latest version of RGraph and contains just a few updates to the code which you can see on the changelog page. There's a new dumbbell variation for the Bar and Horizontal bar charts (both SVG and canvas) and the front page layout of the website has been tweaked.

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HTML datagrid

In the April 2025 (v6.21) release a new datagrid object was added. This makes it easy to add static or dynamic data tables to your pages. It can be used whether you use the canvas or SVG libraries or entirely standalone.

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Get the latest version of RGraph (version 7.11, 21st March 2026) from the download page. You can read the changelog here. There's also older versions available, minified files and links to cdnjs.com hosted libraries.

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License

RGraph can be used for free under the GPL or if that doesn't suit your situation there's an inexpensive (£129) commercial license available.

There's no native double click event but you can add one like this:

myObject = new RGraph.Bar({
    id: 'cvs',
    data: [9,10,6,8,4,6,3],
    options: {
        xaxisLabels: ['Hoolio','Gary','Tom','Mark','Karl','Pob','Bob'],
        marginInner: 20,
        backgroundGridBorder: false,
        backgroundGridVlines: false,
        yaxis: false,
        title: 'Double click event listener added to the chart',
        titleBold: true
    }
}).draw();

// This is the DOM1 method of adding events
myObject.canvas.ondblclick = function (e)
{
    var obj = e.target.__object__;
    var shape = obj.getShape(e);

    if (shape) {
        alert('A bar was clicked with index: ' + shape.dataset);
    }
}

// And this is the DOM2 method of adding event listeners
myObject.canvas.addEventListener('dblclick', function (e)
{
    var obj = e.target.__object__;
    var shape = obj.getShape(e);
    if (shape) {
        alert('[DOM2 event listener] A bar was clicked with index: ' + shape.dataset);
    }
});