Barchart bar and label alignment

[hl_107]

I am using 1.0.13. Barchart works fine with positive values, but the alignment seems to be off with negative values. Below is a screenshot. setBaseNegativeItemLabelPosition doesn't seem to help either.

Can someone pls help me out here?

thanks
Jeff

Code: Select all

        JFreeChart chart = ChartFactory.createBarChart(title, xAxisLabel, yAxisLabel, dataset, PlotOrientation.VERTICAL, false, true, false);
        CategoryPlot plot = (CategoryPlot) chart.getPlot();
        BarRenderer renderer = (BarRenderer) plot.getRenderer();
        
        ItemLabelPosition p = new ItemLabelPosition(ItemLabelAnchor.CENTER, TextAnchor.CENTER);
        renderer.setBasePositiveItemLabelPosition(p);
        renderer.setBaseNegativeItemLabelPosition(p);
        
        if (barColor != null && barColor.length > 0) {
            int i = 0;
            for (Color c : barColor) {
                renderer.setSeriesPaint(i++, c);
                renderer.setShadowVisible(false);
            }
        }

[paradoxoff]

Apparently, you have two series in your dataset, and the BarRenderer thus reserves space for two bars in every category. The bad thing is that no category has values for both series. BAC, AAPL and INTC have only values for the first series (which is shown in green), and FXI has only a value for the second series (which is shown in red).
The fact that the single value for the second series of the FXI category is negative has nothing to do with the problem.
Just create a dataset with one series, and change the renderer to colorize the bar for the series with a negative value in a special way (see the FAQ for suggestions).