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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd">
<html>
<head>
<title>YUI Library Examples: Charts Control: Charts Quickstart Example</title>
<meta http-equiv="content-type" content="text/html; charset=utf-8">
<link rel="stylesheet" type="text/css" href="../../assets/yui.css" >
<style>
/*Supplemental CSS for the YUI distribution*/
#custom-doc { width: 95%; min-width: 950px; }
#pagetitle {background-image: url(../../assets/bg_hd.gif);}
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<script type="text/javascript" src="../../build/charts/charts-debug.js"></script>
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<!--begin custom header content for this example-->
<style type="text/css">
#chart
{
width: 500px;
height: 350px;
}
.chart_title
{
display: block;
font-size: 1.2em;
font-weight: bold;
margin-bottom: 0.4em;
}
</style>
<!--end custom header content for this example-->
<script type="text/javascript">
//enable passthrough of errors from YUI Event:
if ((typeof YAHOO !== "undefined") && (YAHOO.util) && (YAHOO.util.Event)) {
YAHOO.util.Event.throwErrors = true;
}
</script>
</head>
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<div id="ygma"><a href="../../"><img src="../../assets/yui.gif" border="0" height="38"></a></div>
<div id="pagetitle"><h1>YUI Library Examples: Charts Control: Charts Quickstart Example</h1></div>
</div>
<div id="bd">
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<div class="yui-b">
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<div class="yui-u first example">
<div class="promo">
<h1>Charts Control: Charts Quickstart Example</h1>
<div class="exampleIntro">
<p>This example is a demonstration of the <a href="http://developer.yahoo.com/yui/charts/">YUI Chart Control</a>'s basic features.</p>
<p>Please note: The YUI Charts Control requires Flash Player 9.0.45 or higher. The latest version of Flash Player is available at the <a href="http://www.adobe.com/go/getflashplayer">Adobe Flash Player Download Center</a>.</p>
</div>
<div class="example-container module ">
<div class="hd exampleHd">
<p class="newWindowButton yui-skin-sam"><!--<span id="newWindowLinkx"><span class="first-child">--><a href="charts-quickstart_clean.html" target="_blank">View example in new window.</a><!--</span></span>-->
</div> <div id="example-canvas" class="bd">
<!--BEGIN SOURCE CODE FOR EXAMPLE =============================== -->
<span class="chart_title">Monthly Expenses</span>
<div id="chart">Unable to load Flash content. The YUI Charts Control requires Flash Player 9.0.45 or higher. You can download the latest version of Flash Player from the <a href="http://www.adobe.com/go/getflashplayer">Adobe Flash Player Download Center</a>.</p></div>
<script type="text/javascript">
YAHOO.widget.Chart.SWFURL = "../../build/charts/assets/charts.swf";
//--- data
YAHOO.example.monthlyExpenses =
[
{ month: "January", rent: 880.00, utilities: 894.68 },
{ month: "February", rent: 880.00, utilities: 901.35 },
{ month: "March", rent: 880.00, utilities: 889.32 },
{ month: "April", rent: 880.00, utilities: 884.71 },
{ month: "May", rent: 910.00, utilities: 879.811 },
{ month: "June", rent: 910.00, utilities: 897.95 }
];
var myDataSource = new YAHOO.util.DataSource( YAHOO.example.monthlyExpenses );
myDataSource.responseType = YAHOO.util.DataSource.TYPE_JSARRAY;
myDataSource.responseSchema =
{
fields: [ "month", "rent", "utilities" ]
};
//--- chart
var seriesDef =
[
{ displayName: "Rent", yField: "rent" },
{ displayName: "Utilities", yField: "utilities" }
];
YAHOO.example.formatCurrencyAxisLabel = function( value )
{
return YAHOO.util.Number.format( value,
{
prefix: "$",
thousandsSeparator: ",",
decimalPlaces: 2
});
}
YAHOO.example.getDataTipText = function( item, index, series )
{
var toolTipText = series.displayName + " for " + item.month;
toolTipText += "\n" + YAHOO.example.formatCurrencyAxisLabel( item[series.yField] );
return toolTipText;
}
var currencyAxis = new YAHOO.widget.NumericAxis();
currencyAxis.minimum = 800;
currencyAxis.labelFunction = YAHOO.example.formatCurrencyAxisLabel;
var mychart = new YAHOO.widget.LineChart( "chart", myDataSource,
{
series: seriesDef,
xField: "month",
yAxis: currencyAxis,
dataTipFunction: YAHOO.example.getDataTipText
});
</script>
<!--END SOURCE CODE FOR EXAMPLE =============================== -->
</div>
</div>
</div>
<h2 class="first">Create a DataSource</h2>
<p>Like the <a href="http://developer.yahoo.com/yui/datatable/">DataTable Control</a>, Charts use the <a href="http://developer.yahoo.com/yui/datasource/">DataSource Utility</a> for accessing the information it displays. A DataSource instance will accept many forms of data including simple JavaScript Arrays and external data loaded through XHR in formats including XML, JSON, and delimited text.</p>
<textarea name="code" class="JScript" cols="60" rows="10">
YAHOO.example.monthlyExpenses =
[
{ month: "January", rent: 880.00, utilities: 894.68 },
{ month: "February", rent: 880.00, utilities: 901.35 },
{ month: "March", rent: 880.00, utilities: 889.32 },
{ month: "April", rent: 880.00, utilities: 884.71 },
{ month: "May", rent: 910.00, utilities: 879.811 },
{ month: "June", rent: 910.00, utilities: 897.95 }
];
var myDataSource = new YAHOO.util.DataSource( YAHOO.example.monthlyExpenses );
myDataSource.responseType = YAHOO.util.DataSource.TYPE_JSARRAY;
myDataSource.responseSchema =
{
fields: [ "month", "rent", "utilities" ]
};
</textarea>
<p>In this example, data comes from a JavaScript Array. It is passed to the DataSource constructor. All of the fields (<code>"month"</code>, <code>"rent"</code>, and <code>"utilities"</code>) are included in the DataSource <code>responseSchema</code>.</p>
<h2>Define Multiple Series</h2>
<p>An Array of definitions allows you to specify more than one series to display in the Chart control. Each definition generally includes an <code>xField</code> or <code>yField</code> value that specifies which key in the DataSource is used to access the data for a particular axis.</p>
<textarea name="code" class="JScript" cols="60" rows="5">
var seriesDef =
[
{ displayName: "Rent", yField: "rent" },
{ displayName: "Utilities", yField: "utilities" }
];
</textarea>
<p>A <code>displayName</code> is recommended to provide more information about a series to the viewer. This value is used in the mouse-over data tip and the legend, if displayed.</p>
<h2>Customize the Axis</h2>
<p>The LineChart in this example uses a custom NumericAxis. This axis has a minimum bound set to the value 800. A <code>labelFunction</code> is used to format each label on the axis.</p>
<textarea name="code" class="JScript" cols="60" rows="3">
var currencyAxis = new YAHOO.widget.NumericAxis();
currencyAxis.minimum = 800;
currencyAxis.labelFunction = YAHOO.example.formatCurrencyAxisLabel;
</textarea>
<p>The function <code>YAHOO.example.formatCurrencyAxisLabel()</code> uses the <code>YAHOO.util.Number</code> class included with DataSource to format the text as currency.</p>
<textarea name="code" class="JScript" cols="60" rows="9">
YAHOO.example.formatCurrencyAxisLabel = function( value )
{
return YAHOO.util.Number.format( value,
{
prefix: "$",
thousandsSeparator: ",",
decimalPlaces: 2
});
}
</textarea>
<p>Due to the nature of ActionScript-JavaScript communication, this function must be globally accessible. It may not be a method of an object instance. Pass the function reference directly or a string representation of the function name. In this case, we pass a reference to <code>YAHOO.example.formatCurrencyAxisLabel</code>, but we can also use the string value <code>"YAHOO.example.formatCurrencyAxisLabel"</code>.</p>
<h2>Customize the Data Tip</h2>
<p>The chart uses a <code>dataTipFunction</code> to format the text appearing on its mouse-over data tip.</p>
<textarea name="code" class="JScript" cols="60" rows="6">
YAHOO.example.getDataTipText = function( item, index, series )
{
var toolTipText = series.displayName + " for " + item.month;
toolTipText += "\n" + YAHOO.example.formatCurrencyAxisLabel( item[series.yField] );
return toolTipText;
}
</textarea>
<p>Notice that <code>getDataTipText()</code> extracts the y-axis value and formats it using <code>formatCurrencyAxisLabel()</code> to match the formatting on the axis labels.</p>
<h2>Creating the Chart</h2>
<p>All of the customizations made above are passed to the Chart control as initialization attributes. The <code>xField</code> attribute is used globally by all series, and each series defines its own <code>yField</code> to display different data than the other series.</p>
<textarea name="code" class="JScript" cols="60" rows="6">
var mychart = new YAHOO.widget.LineChart( "chart", myDataSource,
{
xField: "month",
series: seriesDef,
yAxis: currencyAxis,
dataTipFunction: YAHOO.example.getDataTipText
});
</textarea>
<p>Once again, don't forget the function reference we pass to <code>dataTipFunction</code> must be globally-accessible to allow Flash Player's ExternalInterface to call it.</p>
<h2>Configuration for This Example</h2>
<p>You can load the necessary JavaScript and CSS for this example from Yahoo's servers. <a href="http://developer.yahoo.com/yui/articles/hosting/?yahoo&dom&event&json&element&datasource&swf&charts&MIN#configure">Click here to load the YUI Dependency Configurator with all of this example's dependencies preconfigured</a>.</p>
</div>
<div class="yui-u">
<div id="loggerModule" class="yui-skin-sam">
<h3 class="firstContent">YUI Logger Output:</h3>
<div id="loggerDiv"></div>
<div id="loggerGloss">
<p><strong>Note:</strong> You are viewing this example in debug mode with logging enabled. This can significantly slow performance.</p>
<p class="loggerButton"><span id="loggerLink"><span class="first-child"><a href="charts-quickstart.html">Reload with logging<br />and debugging disabled.</a></span></span></p>
</div>
</div>
<div id="examples">
<h3>Charts Control Examples:</h3>
<div id="exampleToc">
<ul>
<li class='selected'><a href='../charts/charts-quickstart.html'>Charts Quickstart Example</a></li><li><a href='../charts/charts-legend.html'>Chart with Legend Example</a></li><li><a href='../charts/charts-skins.html'>Skinning a Chart Example</a></li><li><a href='../charts/charts-datatable.html'>Chart and DataTable Example</a></li><li><a href='../charts/charts-xhr-polling.html'>Chart with DataSource Polling</a></li><li><a href='../charts/charts-stacked.html'>Stacked Bar Chart</a></li><li><a href='../charts/charts-tabview.html'>Charts in a TabView</a></li><li><a href='../charts/charts-rotation.html'>Column Chart with Rotated Title and Labels</a></li><li><a href='../charts/charts-styles.html'>Styling Lines, Borders and Fills</a></li><li><a href='../charts/charts-dualaxes.html'>Chart with 2 Numeric Axes</a></li><li><a href='../charts/charts-hideseries.html'>Hide series in a chart.</a></li><li><a href='../charts/charts-seriescustomization.html'>Customize series items</a></li><li><a href='../charts/charts-functionscope.html'>Apply scope to label functions</a></li> </ul>
</div>
</div>
<div id="module">
<h3>More Charts Control Resources:</h3>
<ul>
<li><a href="http://developer.yahoo.com/yui/charts/">User's Guide</a> (external)</li>
<li><a href="../../docs/module_charts.html">API Documentation</a></li>
<li><a href="http://yuiblog.com/assets/pdf/cheatsheets/charts.pdf">Cheat Sheet PDF</a> (external)</li></ul>
</div>
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