Difficulty Changing background colour of JFreeChart

问题

Im trying to change the background color to my bar chart and so far nothing seems to be working

Here is my code below:

JFreeChart expbarchart = ChartFactory.createBarChart("Monthly Expenditures", "Expenditure Type", "Amount (£)", barexp, PlotOrientation.VERTICAL, false, true, false);
    ChartPanel expframe = new ChartPanel(expbarchart);
    expframe.setLocation(695, 49);
    expframe.setSize(641,500);
    expframe.setBorder(new EtchedBorder(EtchedBorder.LOWERED, new Color(173, 216, 230), null));
    graphpanel.add(expframe);

I have tried doing .setbackground() and it does not seem to work

Thanks

回答1:

BarChartDemo1 shows you how to set the chart background paint:

chart.setBackgroundPaint(new Color(173, 216, 230));

It also shows you how to set a ChartTheme that you can change:

StandardChartTheme theme = new StandardChartTheme("JFree/Shadow", true);
Color color = new Color(173, 216, 230);
theme.setPlotBackgroundPaint(color);
theme.setChartBackgroundPaint(color.brighter());
ChartFactory.setChartTheme(theme);

回答2:

try this and customize as per your need.

        // create the chart...
            JFreeChart chart = ChartFactory.createLineChart(
                "# of Sales by Month",   // chart title
                "Month",                       // domain axis label
                "# of Sales",                   // range axis label
                dataset,                         // data
                PlotOrientation.VERTICAL,        // orientation
                true,                           // include legend
                true,                            // tooltips
                false                            // urls
            );

            if(subTitle != null && !subTitle.isEmpty())
                chart.addSubtitle(new TextTitle(subTitle));
            chart.setBackgroundPaint(Color.BLUE);
    //        Paint p = new GradientPaint(0, 0, Color.white, 1000, 0, Color.green);
    //        chart.setBackgroundPaint(p);

            CategoryPlot plot = (CategoryPlot) chart.getPlot();
            plot.setRangePannable(true);
            plot.setRangeGridlinesVisible(true);
            plot.setBackgroundAlpha(1);
            plot.setBackgroundPaint(Color.BLUE);
    //        Paint p = new GradientPaint(0, 0, Color.white, 1000, 0, Color.green);
    //        plot.setBackgroundPaint(p);


            NumberAxis rangeAxis = (NumberAxis) plot.getRangeAxis();
            rangeAxis.setStandardTickUnits(NumberAxis.createIntegerTickUnits());

            ChartUtilities.applyCurrentTheme(chart);

回答3:

You have to use JFreeChart.getPlot().setBackgroundPaint(Color.XXXXXX); like this:

public static void main(String[] args) {
    DefaultPieDataset pieDataset = new DefaultPieDataset(); 
    pieDataset.setValue("LoggedIn" +": "+ 5, 10);
    pieDataset.setValue("LoggedOut" +": "+ 8, 17);
    JFreeChart jfc = ChartFactory.createPieChart("title", pieDataset, false, false, false );
    jfc.getPlot().setBackgroundPaint(Color.BLUE);
    ChartPanel chart = new ChartPanel(jfc);
    JFrame frame = new JFrame();
    frame.add(chart);
    frame.pack();
    frame.setVisible(true);
}

Of course, you can catch the desired color by several different methods regarding your needs, for example:

Color color1 = "anyComponent".getBackgroundColor();

and then apply

jfc.getPlot().setBackgroundPaint(color1);

I hope it helps!

来源：https://stackoverflow.com/questions/36389172/difficulty-changing-background-colour-of-jfreechart

标签

java

swing

jfreechart