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<!DOCTYPE html>
<html>
<head>
<title>AJAX and JSON Data Loading via Data Renderers</title>
<link class="include" rel="stylesheet" type="text/css" href="../jquery.jqplot.min.css" />
<link rel="stylesheet" type="text/css" href="examples.min.css" />
<link type="text/css" rel="stylesheet" href="syntaxhighlighter/styles/shCoreDefault.min.css" />
<link type="text/css" rel="stylesheet" href="syntaxhighlighter/styles/shThemejqPlot.min.css" />
<!--[if lt IE 9]><script language="javascript" type="text/javascript" src="../excanvas.js"></script><![endif]-->
<script class="include" type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.9.1/jquery.min.js"></script>
</head>
<body>
<div id="header">
<div class="nav">
<a class="nav" href="../../../index.php"><span>&gt;</span>Home</a>
<a class="nav" href="../../../docs/"><span>&gt;</span>Docs</a>
<a class="nav" href="../../download/"><span>&gt;</span>Download</a>
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</div>
</div>
<div class="colmask leftmenu">
<div class="colleft">
<div class="col1" id="example-content">
<!-- Example scripts go here -->
<p>Data renderers allow jqPlot to pull data from any external source (e.g. a function implementing an AJAX call). Simply assign the external source to the "dataRenderer" plot option. The only requirement on data renderers is that it must return a valid jqPlot data array.</p>
<div id="chart1" style="height:300px; width:500px;"></div>
<pre class="code prettyprint brush: js"></pre>
<p>Data renderers get passed options by the plot. The signiture for a data renderer is:</p>
<pre class="brush: js">
function(userData, plotObject, options) {
...
return data;
}
</pre>
<p>Where userData is whatever data was passed into the plot, plotObject is a reference back to the plot itself, and options are any options passed into the plots "dataRendererOption" option. The following example shows a more complicated example which uses ajax pulls data from an external json data source.</p>
<div id="chart2" style="height:300px; width:500px;"></div>
<pre class="code prettyprint brush: js"></pre>
<script class="code" type="text/javascript">
$(document).ready(function(){
// Our data renderer function, returns an array of the form:
// [[[x1, sin(x1)], [x2, sin(x2)], ...]]
var sineRenderer = function() {
var data = [[]];
for (var i=0; i<13; i+=0.5) {
data[0].push([i, Math.sin(i)]);
}
return data;
};
// we have an empty data array here, but use the "dataRenderer"
// option to tell the plot to get data from our renderer.
var plot1 = $.jqplot('chart1',[],{
title: 'Sine Data Renderer',
dataRenderer: sineRenderer
});
});
</script>
<script class="code" type="text/javascript">
$(document).ready(function(){
// Our ajax data renderer which here retrieves a text file.
// it could contact any source and pull data, however.
// The options argument isn't used in this renderer.
var ajaxDataRenderer = function(url, plot, options) {
var ret = null;
$.ajax({
// have to use synchronous here, else the function
// will return before the data is fetched
async: false,
url: url,
dataType:"json",
success: function(data) {
ret = data;
}
});
return ret;
};
// The url for our json data
var jsonurl = "./jsondata.txt";
// passing in the url string as the jqPlot data argument is a handy
// shortcut for our renderer. You could also have used the
// "dataRendererOptions" option to pass in the url.
var plot2 = $.jqplot('chart2', jsonurl,{
title: "AJAX JSON Data Renderer",
dataRenderer: ajaxDataRenderer,
dataRendererOptions: {
unusedOptionalUrl: jsonurl
}
});
});
</script>
<!-- End example scripts -->
<!-- Don't touch this! -->
<script class="include" type="text/javascript" src="../jquery.jqplot.min.js"></script>
<script type="text/javascript" src="syntaxhighlighter/scripts/shCore.min.js"></script>
<script type="text/javascript" src="syntaxhighlighter/scripts/shBrushJScript.min.js"></script>
<script type="text/javascript" src="syntaxhighlighter/scripts/shBrushXml.min.js"></script>
<!-- End Don't touch this! -->
<!-- Additional plugins go here -->
<script class="include" language="javascript" type="text/javascript" src="../plugins/jqplot.json2.min.js"></script>
<!-- End additional plugins -->
</div>
<div class="col2">
<div class="example-link"><a class="example-link" href="data-renderers.html">AJAX and JSON Data Loading via Data Renderers</a></div>
<div class="example-link"><a class="example-link" href="barLineAnimated.html">Animated Charts</a></div>
<div class="example-link"><a class="example-link" href="dashboardWidget.html">Animated Dashboard Sample - Filled Line with Log Axis</a></div>
<div class="example-link"><a class="example-link" href="kcp_area.html">Area Chart</a></div>
<div class="example-link"><a class="example-link" href="kcp_area2.html">Area Chart 2</a></div>
<div class="example-link"><a class="example-link" href="axisLabelTests.html">Axis Labels</a></div>
<div class="example-link"><a class="example-link" href="axisLabelsRotatedText.html">Axis Labels and Rotated Text</a></div>
<div class="example-link"><a class="example-link" href="barTest.html">Bar Charts</a></div>
<div class="example-link"><a class="example-link" href="multipleBarColors.html">Bar Colors Example</a></div>
<div class="example-link"><a class="example-link" href="bezierCurve.html">Bezier Curve Plots</a></div>
<div class="example-link"><a class="example-link" href="blockPlot.html">Block Plots</a></div>
<div class="example-link"><a class="example-link" href="bubbleChart.html">Bubble Charts</a></div>
<div class="example-link"><a class="example-link" href="bubble-plots.html">Bubble Plots</a></div>
<div class="example-link"><a class="example-link" href="candlestick.html">Candlestick and Open Hi Low Close Charts</a></div>
<div class="example-link"><a class="example-link" href="theming.html">Chart Theming</a></div>
<div class="example-link"><a class="example-link" href="fillBetweenLines.html">Charts with Fill Between Lines</a></div>
<div class="example-link"><a class="example-link" href="kcp_cdf.html">Cumulative Density Function Chart</a></div>
<div class="example-link"><a class="example-link" href="dashedLines.html">Dashed Lines with Smoothing</a></div>
<div class="example-link"><a class="example-link" href="cursor-highlighter.html">Data Point Highlighting, Tooltips and Cursor Tracking</a></div>
<div class="example-link"><a class="example-link" href="point-labels.html">Data Point labels</a></div>
<div class="example-link"><a class="example-link" href="date-axes.html">Date Axes</a></div>
<div class="example-link"><a class="example-link" href="dateAxisRenderer.html">Date Axes 2</a></div>
<div class="example-link"><a class="example-link" href="rotatedTickLabelsZoom.html">Date Axes, Rotated Labels and Zooming</a></div>
<div class="example-link"><a class="example-link" href="canvas-overlay.html">Draw Lines on Plots - Canvas Overlay</a></div>
<div class="example-link"><a class="example-link" href="draw-rectangles.html">Draw Rectangles on Plots</a></div>
<div class="example-link"><a class="example-link" href="kcp_engel.html">Engel Curves</a></div>
<div class="example-link"><a class="example-link" href="bandedLine.html">Error Bands and Confidence Intervals</a></div>
<div class="example-link"><a class="example-link" href="area.html">Filled (Area) Charts</a></div>
<div class="example-link"><a class="example-link" href="axisScalingForceTickAt.html">Force Plot to Have Tick at 0 or 100</a></div>
<div class="example-link"><a class="example-link" href="hiddenPlotsInTabs.html">Hidden Plots</a></div>
<div class="example-link"><a class="example-link" href="customHighlighterCursorTrendline.html">Highlighting, Dragging Points, Cursor and Trend Lines</a></div>
<div class="example-link"><a class="example-link" href="line-charts.html">Line Charts and Options</a></div>
<div class="example-link"><a class="example-link" href="kcp_lorenz.html">Lorenz Curves</a></div>
<div class="example-link"><a class="example-link" href="mekkoCharts.html">Mekko Charts</a></div>
<div class="example-link"><a class="example-link" href="meterGauge.html">Meter Gauge</a></div>
<div class="example-link"><a class="example-link" href="candlestick-charts.html">Open Hi Low Close and Candlestick Charts</a></div>
<div class="example-link"><a class="example-link" href="pieTest.html">Pie Charts and Options</a></div>
<div class="example-link"><a class="example-link" href="pieTest4.html">Pie Charts and Options 2</a></div>
<div class="example-link"><a class="example-link" href="pie-donut-charts.html">Pie and Donut Charts</a></div>
<div class="example-link"><a class="example-link" href="selectorSyntax.html">Plot Creation with jQuery Selectors</a></div>
<div class="example-link"><a class="example-link" href="zooming.html">Plot Zooming and Cursor Control</a></div>
<div class="example-link"><a class="example-link" href="kcp_pdf.html">Probability Density Function Chart</a></div>
<div class="example-link"><a class="example-link" href="kcp_pyramid_by_age.html">Pyramid Chart By Age</a></div>
<div class="example-link"><a class="example-link" href="kcp_pyramid.html">Pyramid Charts</a></div>
<div class="example-link"><a class="example-link" href="kcp_pyramid2.html">Pyramid Charts 2</a></div>
<div class="example-link"><a class="example-link" href="kcp_quintiles.html">Quintile Pyramid Charts</a></div>
<div class="example-link"><a class="example-link" href="resizablePlot.html">Resizable Plots</a></div>
<div class="example-link"><a class="example-link" href="rotated-tick-labels.html">Rotated Labels and Font Styling</a></div>
<div class="example-link"><a class="example-link" href="smoothedLine.html">Smoothed Lines</a></div>
<div class="example-link"><a class="example-link" href="bar-charts.html">Vertical and Horizontal Bar Charts</a></div>
<div class="example-link"><a class="example-link" href="waterfall.html">Waterfall Charts</a></div>
<div class="example-link"><a class="example-link" href="waterfall2.html">Waterfall Charts 2</a></div>
<div class="example-link"><a class="example-link" href="zoomOptions.html">Zoom Options</a></div>
<div class="example-link"><a class="example-link" href="zoomProxy.html">Zoom Proxy - Control one plot from another</a></div>
<div class="example-link"><a class="example-link" href="zoom1.html">Zooming</a></div>
<div class="example-link"><a class="example-link" href="dateAxisLogAxisZooming.html">Zooming with Date and Log Axes</a></div>
</div>
</div>
</div>
<script type="text/javascript" src="example.min.js"></script>
</body>
</html>