How do I add a click event to a bar in my Bar chart?

oujae · 2026-06-01T09:51:36+01:00

i have a bar chart and want to add click to a bar. how is this possible?

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Hi,

It certainly is. There are a few ways that you can do this - some using more standard events but the easiest, I think, is to use the RGraph pseudo-standard event handlers that mimic the standard ones and to add them you could do this:

    myBar = new RGraph.Bar({
        id: 'cvs',
        data: [8,6,4,3,5,9,6],
        options: {
            marginInner: 20
        }
    }).draw();

    // A mousemove event listener to change the mouse pointer
    myBar.$2.onmousemove = function (e, obj)
    {
        // By returning a truthy value the mouse pointer
        // will be changed to the hand.
        return true;
    }

    // The click event listener that handles the click
    myBar.$2.onclick = function (e, obj)
    {
        alert('The third bar on the chart was clicked!');
    }

You could also do this with the new events property if you prefer, but you do need to check the index of the bar because the event will be applied to every bar on the chart:

    myBar = new RGraph.Bar({
        id: 'cvs',
        data: [8,6,4,3,5,9,6],
        options: {
            marginInner: 20,
            events: {
                click: function (e, shape)
                {
                    if (shape.dataset === 2) {
                        alert('The third bar was clicked!');
                    }
                },
                mousemove: function (e,shape)
                {
                    if (shape.dataset === 2) {
                        return true;
                    }
                }
            }
        }
    }).draw();

Cheers.

Richard

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