I've currently been struggeling to change the position of category labels in a pie chart and have some suggestions for improvements.
The first thing I ran into was that i would like to make the position dependant on the section (zero-based index). It would be a neat thing to have the section passed as an argument to the
PiePlot.calculateLabelLocation(..) method. I have sub-classed the PiePlot and altered the drawLabel(..) method to solve this.
Another thing I heve seen is that the drawLabels(...) method only is called if the value of the category is greater than zero. Since I'm placing all my labels on the left side of my pies in a multi series pie plot (using CategoryDataset), I really would like to be able to draw the label even though the value for a particular category is zero. For other series this category has values greater than zero. Now I get a 'hole' for labels belonging to empty categories. To fix this I would have to override the entiere drawPie() method. Seems a little tedious
Further, there seem to be some problem with updating the plot when the dataset changes. Now, I solve this by re-setting the dataset with setDataset(...).
Otherwise I would like to thank you all for an excellent product. I really think it is great to use and the code is of very high quality!
Regards
/Fredrik