How to make JFreeChart to keep aspect ratio?

Question

Is it possible to keep some aspect ratio of units? For example, is it possible to make them square?

In the following example a rectangle draw. Unfortunately, it is possible to make it square by resizing window. Is it possible to tell JFreeChart to keep ratio while resizing?

package tests.org.jfree.chart;

import javax.swing.JFrame;
import javax.swing.SwingUtilities;

import org.jfree.chart.ChartFactory;
import org.jfree.chart.ChartPanel;
import org.jfree.chart.JFreeChart;
import org.jfree.data.xy.DefaultXYDataset;

public class Runner_JFreeChart_01 {

    public static class MyChartPanel extends ChartPanel {

        private static final long serialVersionUID = 8474384653351996554L;

        DefaultXYDataset dataset = new DefaultXYDataset();
        {
            dataset.addSeries("key", new double[][]{{10, 300, 300, 10, 10},{10, 10, 50, 50, 10}});
        }

        JFreeChart chart = ChartFactory.createXYLineChart("", "", "", dataset);

        public MyChartPanel() {
            super(null);
            setChart(chart);
        }

    }

    public static void main(String[] args) {

        SwingUtilities.invokeLater(new Runnable() {

            @Override
            public void run() {
                JFrame frame = new JFrame("Runner_JFreeChart_01");
                frame.add(new MyChartPanel());

                frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

                frame.pack();
                frame.setLocationRelativeTo(null);
                frame.setVisible(true);

            }
        });


    }

}

result:

enter image description here

What do you mean? I don't want to prevent component from resize. I would like a chart keeping ratio withing resizing component. — Suzan Cioc, Dec 01 '14 at 13:04
Probably more like [this](http://stackoverflow.com/a/14588506/230513). — trashgod, Dec 01 '14 at 14:45

score 1 · Answer 1 · answered Jul 11 '18 at 08:26

In your main try adding the following code and see if it works.

 public static void main(String[] args) { 
     MyChartPanel myChart = new MyChartPanel();
     myChart.setMinimumDrawWidth(0);
     myChart.setMaximumDrawWidth(Integer.MAX_VALUE);
     myChart.setMinimumDrawHeight(0);
     myChart.setMaximumDrawHeight(Integer.MAX_VALUE);

      // Other code here

Then where you add your chart to the JFrame: replace the following code:

frame.add(new MyChartPanel());

with

frame.add(myChart);

Enjoy!

How to make JFreeChart to keep aspect ratio?

1 Answers1