Read values on Jfreechart graph

[marouene_]

Hello, i want to know if it's possible to read the values when i put the cursor on the graph like this

[marouene_]

no idea?

[paradoxoff]

In principle that is possible by using XYItemEntities and tool tips.
There is not much that you need to do to activate them.
Here is a code snippet:

Code: Select all

public class SimpleToolTipDemo {
	public static void main(String[] args) {
		DefaultXYDataset set = new DefaultXYDataset();
		set.addSeries("Values",new double[][]{{-10,-1,-0.1,0,0.1,1,10},{-0.1,-1,-10,Double.NaN,10,1,0.1}});		
		JFreeChart chart = ChartFactory.createXYLineChart(
			"Tool Tips","x","y",
			set,PlotOrientation.VERTICAL,true, true, false);
		XYItemRenderer r = chart.getXYPlot().getRenderer();
		r.setBaseToolTipGenerator(new StandardXYToolTipGenerator());
		JFrame frame = new JFrame("Test");
		frame.setContentPane(new ChartPanel(chart));
		frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
		frame.pack();
		frame.setVisible(true);
	}
}