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I'm using JFreeChart to build drillable web reports (i.e. - click on a slice of a pie chart, it displays data relating to that slice). Using PieChart3DDemo1.java as a reference, say I had a database table with rows for Visual Basic, Java, C/C++, PHP, Perl. In the PieDataset this becomes a key/value ...

I just got done looking at this in order to add a 'onclick' attribute to the imagemap tag. The easiest way I found was to create my own org.jfree.chart.imagemap.URLTagFragmentGenerator and org.jfree.chart.url.CategoryURLGenerator (in my test case I was using a CategoryPlot). I had the generateURL() ...