Donut-in-donut

This example of three donut charts shows how they can be nested inside each other.

This goes in the documents header:

<script src="RGraph.common.core.js"></script>
<script src="RGraph.pie.js"></script>

Put this where you want the chart to show up:

<canvas id="cvs" width="550" height="550">
    [No canvas support]
</canvas>

This is the code that generates the chart:

<script>
    window.onload = function ()
    {
        var pie1 = new RGraph.Pie({
            id: 'cvs',
            data: [4,3,5,6,8],
            options: {
                variant: 'donut',
                variantDonutWidth: 50,
                strokestyle: 'white',
                linewidth: 5,
                gutterLeft: 15,
                gutterRight: 15,
                gutterTop: 15,
                gutterBottom: 15,
                shadowBlur: 25,
                shadowOffsetx: 0,
                shadowOffsety: 0
            }
        }).draw()

        var pie2 = new RGraph.Pie({
            id: 'cvs',
            data: [5,4,8,6,2],
            options: {
                radius: pie1.radius - 50,
                variant: 'donut',
                variantDonutWidth: 50,
                strokestyle: 'white',
                linewidth: 5,
                shadow: false
            }
        }).draw()



        var pie3 = new RGraph.Pie({
            id: 'cvs',
            data: [4,1,5,6,3],
            options: {
                radius: pie2.radius - 50,
                variant: 'donut',
                variantDonutWidth: 50,
                strokestyle: 'white',
                linewidth: 5,
                shadowBlur: 25,
                shadowOffsetx: 0,
                shadowOffsety: 0
            }
        }).draw()
        
        RGraph.ObjectRegistry.bringToFront(pie2);
    };
</script>