JFreeChart BarChart -> NO gradient

Question

my bar chart is always drawn with a gradient color by default. I just want a simple color without any styled effects.

Can anyone help ?

Code:

   final JFreeChart chart = ChartFactory.createBarChart(
        "",         // chart title
        xLabel,               // domain axis label
        yLabel,                  // range axis label
        dataset,                  // data
        PlotOrientation.VERTICAL, // orientation
        true,                     // include legend
        false,                     // tooltips?
        false                     // URLs?
    );

  final CategoryPlot plot = chart.getCategoryPlot();
  // SOMETHING HAS TO BE DONE HERE

  showChart(chart); // Simply shows the chart in a new window

Thanks

Paste your code. In the most cases you should add some code to make it gradient like: GradientPaint — Dmitry Alexandrov, Aug 16 '11 at 09:53

score 52 · Accepted Answer · edited Aug 02 '15 at 19:33

The problem lies in the BarPainter you are using. The JFreeChart version 1.0.13 default is to use GradientBarPainter which adds a metallic-ish look to the bar. If you want the "old" look the solution is to use the StandardBarPainter.

final CategoryPlot plot = chart.getCategoryPlot();
((BarRenderer) plot.getRenderer()).setBarPainter(new StandardBarPainter());

That should do it.

Alternatively, if you want use JFreeChart's BarRenderer, you could force it to use the StandardBarPainter by calling the static method setDefaultBarPainter() before initializing your renderer.

final CategoryPlot plot = chart.getCategoryPlot();
BarRenderer.setDefaultBarPainter(new StandardBarPainter());
((BarRenderer) plot.getRenderer()).setBarPainter(new BarPainter());

If you want more control of the chart you can always build it from the ground up instead of using ChartFactory, but that does require a lot extra code.

Kudos for the solution. The "default" (I think) bar chart has this very cheap look. — rbaleksandar, Oct 04 '15 at 13:46

score 8 · Answer 2 · answered Sep 19 '12 at 22:09

8

Before you create the chart from ChartFactory you can set the chart theme:

ChartFactory.setChartTheme(StandardChartTheme.createLegacyTheme());

The default is the JFreeTheme which adds the gradient. The following themes are available:

ChartFactory.setChartTheme(StandardChartTheme.createJFreeTheme());
ChartFactory.setChartTheme(StandardChartTheme.createDarknessTheme());

answered Sep 19 '12 at 22:09

Kazi Islam

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This solution helped me in case of using StackedBarChart which was not affected by changing barPainter in renderer. Perhaps I was accessing wrong renderer. Nevertheless this helps. – bpawlowski Nov 02 '17 at 11:57

trashgod · Answer 3 · 2020-05-03T17:27:00.420

1

The source code for an older version of org.jfree.chart.demo.BarChartDemo1 shows how to set the series colors. Just specify plain colors instead of gradients.

renderer.setSeriesPaint(0, Color.red);
renderer.setSeriesPaint(1, Color.green);
renderer.setSeriesPaint(2, Color.blue);

Correction: The key to @Jes's helpful answer may be found in the initialization of defaultBarPainter in BarRenderer.

edited May 03 '20 at 17:27

answered Aug 16 '11 at 18:15

trashgod

203,806
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Does not work too, still everything is drawn with a gradient. Unfortunately i can not upload an image yet :( Furthermore the what will happen with at the upper solution if there are more than three columns ? – shorty Aug 17 '11 at 06:23
An image would be good, but the code would be better. If you do nothing, you should get the colors prescribed by the [`DefaultDrawingSupplier`](http://www.jfree.org/jfreechart/api/javadoc/org/jfree/chart/plot/DefaultDrawingSupplier.html). – trashgod Aug 17 '11 at 09:40

JFreeChart BarChart -> NO gradient

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