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<!DOCTYPE html>
<html>
<head>
<meta http-equiv="X-UA-Compatible" content="chrome=1">
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<title>RGraph: HTML5 Javascript charts library - A basic example of Pie charts in tooltips</title>
<meta name="keywords" content="rgraph javascript charts html5 canvas basic example pie charts tooltips" />
<meta name="description" content="RGraph: HTML5 Javascript charts library - A basic example of Pie charts in tooltips" />
<!-- Include the RGraph libraries -->
<script src="../libraries/RGraph.common.core.js" ></script>
<script src="../libraries/RGraph.common.tooltips.js" ></script>
<script src="../libraries/RGraph.bar.js" ></script>
<script src="../libraries/RGraph.pie.js" ></script>
<!--[if IE 8]><script src="../excanvas/excanvas.original.js"></script><![endif]-->
</head>
<body>
<h1>RGraph: <span>HTML5 Javascript charts library</span> - A basic example of Pie charts in tooltips</h1>
<canvas id="myBar" width="1000" height="250">[No canvas support]</canvas>
<script>
window.onload = function ()
{
/**
* This creates the Bar chart
*/
var bar = new RGraph.Bar('myBar', [12,13,16,15]);
bar.Set('chart.gutter.left', 35);
bar.Set('chart.colors', ['red']);
bar.Set('chart.title', 'A basic graph with charts in tooltips');
bar.Set('chart.labels', ['Kev', 'Brian', 'Fred', 'John']);
// A function which returns the string which is used as every tooltip
bar.Set('chart.tooltips', function () { return '<canvas id="__tooltip__canvas__" width="300" height="200">[No canvas support]</canvas>';});
bar.Draw();
/**
* This is the function which ceates the Pie chart (using the custom ontooltip RGraph event
*/
function myCreatePieChart(obj)
{
var canvas = obj.canvas;
var context = obj.context;
var id = obj.id;
// This gets the tooltip index from the tooltip (which is stored in the RGraph registry) itself
var idx = RGraph.Registry.Get('chart.tooltip').__index__;
/**
* The Pie chart data. Realistically this would come from a dynamic source,
* eg AJAX
*/
var pieData = [
[4,5,3,6],
[8,4,5,2],
[4,3,5,1],
[4,2,1,3]
];
var pie = new RGraph.Pie('__tooltip__canvas__', pieData[idx]);
pie.Set('chart.key', ['Monday','Tuesday','Wednesday','Thursday']);
pie.Set('chart.align', 'left');
pie.Set('chart.gutter.top', 10);
pie.Set('chart.gutter.bottom', 10);
pie.Set('chart.gutter.left', 10);
pie.Set('chart.gutter.right', 10);
pie.Set('chart.exploded', [3,3,3,3]);
pie.Set('chart.strokestyle', 'rgba(0,0,0,0)');
pie.Draw();
}
RGraph.AddCustomEventListener(bar, 'ontooltip', myCreatePieChart);
}
</script>
<p>
This is a basic example that shows charts (Pie charts) in tooltips. The canvas element is part of the tooltip
HTML code (specified like regular tooltips), and then it uses the <i>ontooltip</i> event to run some code whhich
then creates the Pie chart in the tooltip.
</p>
</body>
</html>
|
