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<title>RGraph: HTML5 Javascript charts library - pie charts</title>
<meta name="keywords" content="rgraph html5 canvas example pie charts" />
<meta name="description" content="RGraph: HTML5 Javascript charts library - Pie charts example" />
<meta property="og:title" content="RGraph: HTML5 Javascript charts library" />
<meta property="og:description" content="A charts library based on the HTML5 canvas tag" />
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<script src="../libraries/RGraph.common.effects.js" ></script>
<script src="../libraries/RGraph.pie.js" ></script>
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<script>
window.onload = function ()
{
/**
* These are not angles - these are values. The appropriate angles are calculated
*/
var pie1 = new RGraph.Pie('pie1', [41,37,16,6]); // Create the pie object
pie1.Set('chart.labels', ['MSIE 7 (41%)', 'MSIE 6 (37%)', 'Firefox (16%)', 'Safari (3%)']);
//pie1.Set('chart.labels.sticks', true);
pie1.Set('chart.gutter.left', 30);
pie1.Set('chart.gutter.right', 30);
pie1.Set('chart.gutter.top', 35);
pie1.Set('chart.gutter.bottom', 35);
pie1.Set('chart.title', "Browser share");
pie1.Set('chart.title.vpos', 0.3);
pie1.Set('chart.shadow', false);
pie1.Set('chart.tooltips.effect', 'fade');
pie1.Set('chart.tooltips.event', 'onmousemove');
pie1.Set('chart.tooltips', pie1.Get('chart.labels'));
pie1.Set('chart.highlight.style', '2d');
pie1.Set('chart.linewidth', 2);
pie1.Set('chart.strokestyle', 'white');
pie1.Set('chart.shadow', true);
pie1.Set('chart.shadow.offsetx', 0);
pie1.Set('chart.shadow.offsety', 0);
pie1.Set('chart.shadow.blur', 15);
pie1.Draw();
var pie2 = new RGraph.Pie('pie2', [12,29,45,17,7]); // Create the pie object
pie2.Set('chart.gutter.left', 45);
pie2.Set('chart.colors', ['red', 'pink', '#6f6', 'blue', 'yellow']);
pie2.Set('chart.key', ['John (2%)', 'Richard (29%)', 'Fred (45%)', 'Brian (17%)', 'Peter (7%)']);
pie2.Set('chart.key.background', 'white');
pie2.Set('chart.strokestyle', 'white');
pie2.Set('chart.linewidth', 3);
pie2.Set('chart.exploded', [10,10,10,20,20]);
pie2.Set('chart.shadow', true);
pie2.Set('chart.shadow.offsetx', 0);
pie2.Set('chart.shadow.offsety', 0);
pie2.Set('chart.shadow.blur', 25);
if (RGraph.isIE8()) {
pie2.Draw();
} else {
RGraph.Effects.Pie.RoundRobin(pie2);
}
}
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<div id="breadcrumb">
<a href="../index.html">RGraph: HTML5 Javascript charts library</a>
>
<a href="./index.html">Examples</a>
>
Pie chart
</div>
<h1>RGraph: <span>HTML5 Javascript charts library</span> - Pie charts</h1>
<script>
if (RGraph.isIE8()) {
document.write('<div style="background-color: #fee; border: 2px dashed red; padding: 5px"><b>Important</b><br /><br /> Internet Explorer 8 does not natively support the HTML5 canvas tag, so if you want to see the charts, you can either:<ul><li>Install <a href="http://code.google.com/chrome/chromeframe/">Google Chrome Frame</a></li><li>Use ExCanvas. This is provided in the RGraph Archive.</li><li>Use another browser entirely. Your choices are Firefox 3.5+, Chrome 2+, Safari 4+ or Opera 10.5+. </li></ul> <b>Note:</b> Internet Explorer 9 fully supports the canvas tag.</div>');
}
</script>
<div>
<p>
Pie charts can be used when you need to represent a value as part of a whole. It is commonly used to represent percentages,
relative magnitudes or relative frequencies. If your intent is to compare a particular value (slice) against the whole of
the Pie chart, then it can be quite effective. If however you want to compare two seperate segments, then it can get
more difficult. If this is the case, you may want to consider a bar chart for example.
</p>
<p>
The colours can be customised, as can the borders (using the same color as the background and a line width of
about 5 gives the effect of segment separation. The chart can also have a drop shadow if you want one, but this shouldn't
be used in conjunction with segment seperation.
</p>
</div>
<div>
<ul>
<li><a href="../docs/pie.html">Pie charts API documentation</a></li>
</ul>
</div>
<div style="text-align: center">
<canvas id="pie1" width="450" height="300">[No canvas support]</canvas>
<canvas id="pie2" width="450" height="300">[No canvas support]</canvas>
</div>
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