Pie chart custom border highlighting

Tooltips and other dynamic features may be affected by the redrawing.

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.pie.js"></script>

Put this where you want the chart to show up:

<canvas id="cvs" width="450" height="300">
    [No canvas support]
</canvas>

This is the code that generates the chart:

<script>
    var colors = ['red','#ccc','#0f0','blue','pink','yellow','black']
        labels = ['Monday', 'Tuesday','Wednesday','Thursday','Friday','Saturday','Sunday']

    // Create the Pie chart
    var pie = new RGraph.Pie({
        id: 'cvs',
        data: [4,6,3,5,2,5,8],
        options: {
            labels: labels,
            tooltips: labels,
            tooltipsEvent: 'mousemove',
            tooltipsHighlight: false,
            textColor: '#aaa',
            strokestyle: 'rgba(0,0,0,0)',
            exploded: [,25],
            textAccessible: true,
            labelsSticksList: true,
            labelsSticksColors: RGraph.arrayPad([], labels.length, 'gray'),
            labelsSticksLinewidth: 1
        }
    }).draw().on('tooltip', function (obj)
    {
        var co      = obj.context,
            tooltip = RGraph.Registry.get('chart.tooltip'),
            index   = tooltip.__index__,
            shape   = obj.angles[index],
            color   = colors[index]

        RGraph.path2(co, 'b a % % % % % false a % % % % % true f %',
            shape[2], shape[3], obj.radius, shape[0], shape[1],
            shape[2], shape[3], obj.radius + 5, shape[1], shape[0],
            color
        );

        RGraph.path2(co, 'lc butt lw 3 b a % % % % % false s white',
            shape[2], shape[3], obj.radius, shape[0], shape[1]
        );
        
        // Set some CSS on the tooltip
        tooltip.style.border  = '3px ' + color + ' solid';
        tooltip.style.padding = '3px';
    });
</script>