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