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1.4 +<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
1.5 +<html>
1.6 +<head>
1.7 + <title>Cewolf Tutorial(5): Create ImageMap and Tooltip Information</title>
1.8 + <meta name="author" content="Guido Laures">
1.9 + <link href="../cewolf.css" rel="stylesheet" type="text/css">
1.10 +</head>
1.11 +<body>
1.12 +<h1>Tutorial: Step 5</h1>
1.13 +<h2>Create ImageMap and Tooltip Information</h2>
1.14 +<p> To provide your chart with additionnal tooltips and image map
1.15 +information you have to provide an additional Java class or enhance an
1.16 +existing one like the one below. In this tutorial we will add some
1.17 +methods to the datasetproducer class which had been introduced at the
1.18 +beginning of this tutorial. </p>
1.19 +<p> </p>
1.20 +<pre>...<br> public String generateLink(Object data, int series, Object category) {<br> return seriesNames[series];<br> }<br><br> public String generateToolTip(CategoryDataset arg0, int series, int arg2) {<br> return seriesNames[series];<br> }<br>...<br></pre>
1.21 +<p> As you can see it is very easy to implement a class that produces
1.22 +image map and tooltips information. First of all it has to implement the
1.23 +interfaces <tt>CategoryItemLinkGenerator</tt> and <tt>CategoryToolTipGenerator</tt>
1.24 +(as it produces a CategoryDataset). For other data types refer to the <a
1.25 + href="../apidoc/index.html">cewolf java api</a>. </p>
1.26 +<p> To let your class produce links and tooltips for the chart image you
1.27 +have to change the <cewolf:img> tag as follows: </p>
1.28 +<p> </p>
1.29 +<pre><cewolf:img chartid="line" renderer="cewolf" width="400" height="300"><br> <cewolf:map id="pageViews"/><br></cewolf:img><br></pre>
1.30 +<p> Reload your page and you will see tooltips and links on data points.
1.31 +Internet Explorer browsers are handled slightly different as others as
1.32 +they are able to render a tooltip based on the <tt>alt</tt> attribute
1.33 +inside an image map. All other browser need the overlib.js for this.
1.34 +Cewolf tries to determine the used browser and renders a correct page
1.35 +transparently. </p>
1.36 +<p> For further information on using Cewolf refer to the <a
1.37 + href="../taglib.html">Tag Library Reference</a> and the <a
1.38 + href="../apidoc/index.html">Cewolf JavaDoc</a>. </p>
1.39 +<p> <b>If you want to see more examples of how to implement catchy charts
1.40 +in your webapp, you should deploy the example webapp (downloadable from
1.41 +the <a href="http://cewolf.sf.net" alt="Cewolf Homepage">Cewolf home
1.42 +page</a> and have a look at its sourcecode.</b> </p>
1.43 +<a height="30" target="new" href="http://sourceforge.net"><img
1.44 + alt="SourceForge Logo" border="0" height="30"
1.45 + src="http://sourceforge.net/sflogo.php?group_id=57282&type=5"></a>
1.46 +</body>
1.47 +</html>