JFreeChart help

[lowlyintern]

Hey there, I'm having some trouble with the ThermometerPlot in JFreeChart. Basically all I want to do is find the XY-value of where the "mercury" is currently set to on the JPanel/JFrame or what have you.

package smartt;

import java.awt.*;
import javax.swing.JPanel;
import javax.swing.JSlider;
import javax.swing.event.ChangeEvent;
import javax.swing.event.ChangeListener;
import org.jfree.chart.ChartPanel;
import org.jfree.chart.JFreeChart;
import org.jfree.chart.plot.ThermometerPlot;
import org.jfree.data.general.DefaultValueDataset;
import org.jfree.data.general.ValueDataset;
import org.jfree.ui.ApplicationFrame;
import org.jfree.ui.RectangleInsets;

public class DepthPanel extends ApplicationFrame
{
    static class ContentPanel extends JPanel
            implements ChangeListener
    {

        JSlider slider;
        DefaultValueDataset dataset;

        private static JFreeChart createChart(ValueDataset valuedataset)
        {
            ThermometerPlot depthplot = new ThermometerPlot(valuedataset);
            JFreeChart jfreechart = new JFreeChart("Depth Chart", JFreeChart.DEFAULT_TITLE_FONT, depthplot, true);
            depthplot.setInsets(new RectangleInsets(5D, 5D, 5D, 5D));
            depthplot.setPadding(new RectangleInsets(10D, 10D, 10D, 10D));
            depthplot.setThermometerStroke(new BasicStroke(2.0F));
            depthplot.setThermometerPaint(Color.lightGray);
            depthplot.setBulbRadius(0);
            depthplot.setUnits(ThermometerPlot.UNITS_NONE);
            depthplot.setGap(5);
            depthplot.setUpperBound(0);
            depthplot.setLowerBound(-1500);
            System.out.println(depthplot.getRangeAxis().toString());

            return jfreechart;
        }

        public void stateChanged(ChangeEvent changeevent)
        {
            dataset.setValue(new Integer(slider.getValue()));
        }

        public ContentPanel()
        {
            super(new BorderLayout());
            slider = new JSlider(-1500, 0);
            slider.setPaintLabels(true);
            slider.setPaintTicks(true);
            slider.setMajorTickSpacing(100);
            slider.addChangeListener(this);
            add(slider, "South");
            dataset = new DefaultValueDataset(slider.getValue());
            add(new ChartPanel(createChart(dataset)));
        }
    }
        
        


	public DepthPanel(String s)
	{
            super(s);
            JPanel jpanel = createDemoPanel();
            setContentPane(jpanel);
	}

	public static JPanel createDemoPanel()
	{
            return new ContentPanel();
	}

	public static void main(String args[])
	{
            DepthPanel thermometerdemo1 = new DepthPanel("Depth");
            thermometerdemo1.pack();
            thermometerdemo1.setVisible(true);
	}
}

[Norm]

Could you explain where your problems are in the code? I don't see any comments saying *** HERE ***
or any reference to "mercury".

[lowlyintern]

My bad, by "mercury" I just meant the the rounded rectangle that is used to denote what the current temperature is which is currently set by the slider. And it's not so much that there's a problem in the code but just a lack of knowledge on my part on how to retrieve the dimensions/location of that rounded rectangle or just the XY-value of top of that rectangle on the JPanel. Everything I've tried (trying to get ChartRenderingInfo/methods in ThermometerPlot or Plot) has been a dead end but I may have missed something in there. The code above is just a demonstration of what I'm talking about.

[Norm]

Could you execute the program, take a screen shot and note on the image what values you are looking for?

[lowlyintern]

[Norm]

What jar file do you need to compile the above code?

Have you read the API doc for the JFreeChart classes? I would think there are methods or callbacks or listeners to use to give you the info you want.

[lowlyintern]

Just JFreeChart and JCommon http://sourceforge.net/projects/jfreechart/files/. And I've gone through all of the applicable API docs for ThermometerPlot to no avail.

[Norm]

How does ThermometerPlot use the ValueDataset value?
That appears to be connected to the slider which sends the data that controls the height of the column being displayed.

[Norm]

How does ThermometerPlot use the ValueDataset value?
That appears to be connected to the slider which sends the data that controls the height of the column being displayed.