A stacked bar chart with clickable "whole bars"

By using the drawing API rect object you can make the whole bar of a stacked Bar chart clickable - allowing you to 'group' tooltips etc

This goes in the documents header:

<script src="RGraph.common.core.js"></script>
<script src="RGraph.common.dynamic.js"></script>
<script src="RGraph.common.tooltips.js"></script>
<script src="RGraph.drawing.rect.js"></script>
<script src="RGraph.bar.js"></script>

Put this where you want the chart to show up:

<canvas id="cvs" width="600" height="250">
    [No canvas support]
</canvas>

This is the code that generates the chart:

<script>
    window.onload = function ()
    {
        var tooltips = ['John results','James results','Freds results','Luke results','Luis results'];

        var bar = new RGraph.Bar({
            id: 'cvs',
            data: [[5.33,2.33,3.32],[3.42,2.23,4.23],[4.23,3.23,4.99], [7.99,2.98,2.35], [2.75,1.02,5.24]],
            options: {
                labels: ['John','James','Fred','Luke','Luis'],
                labelsAbove: true,
                labelsAboveDecimals: 2,
                linewidth: 2,
                strokestyle: 'white',
                colors: ['Gradient(#4572A7:#66f)','Gradient(#AA4643:white)','Gradient(#89A54E:white)'],
                shadow: true,
                shadowOffsetx: 1,
                shadowOffsety: 1,
                shadowBlur: 5,
                hmargin: 25,
                gutterLeft: 45,
                backgroundGridVlines: false,
                backgroundGridBorder: false,
                axisColor: '#ccc',
                noyaxis: true,
                grouping: 'stacked',
                textAccessible: true
            }
        }).draw()
    
        for (var i=0; i<bar.coords2.length; ++i) {

            var x = bar.coords2[i][0][0];
            var y = bar.coords2[i][0][1];
            var w = bar.coords2[i][0][2];
            var h = bar.coords2[i][0][3] + bar.coords2[i][1][3] + bar.coords2[i][2][3]; // Sum up the heights of the bar segments

            var rect = new RGraph.Drawing.Rect({
                id: 'cvs',
                x: x,
                y: y,
                width: w,
                height: h,
                options: {
                    strokestyle: 'rgba(0,0,0,0)',
                    fillstyle: 'rgba(0,0,0,0)',
                    tooltips: [tooltips[i]],
                    highlightStroke: 'rgba(0,0,0,0)'
                }
            }).draw()
        }
    };
</script>