mouse click not returning correct values

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lia
Posts: 18
Joined: Sat Oct 14, 2006 5:02 am
Location: Victoria BC

mouse click not returning correct values

Post by lia » Thu Aug 02, 2007 12:37 am

I have taken TimeSeriesDemo1 and modified by adding a ChartMouseListene to it. When I click on the chart and get the x axis value based on the technique shown in CrossHairDemo1 ( cast the double to a long and use the long to create a Date, use the Date to create a Day) I am not getting correct values. Please tell me what I am doing wrong. Here is the code

Code: Select all

/* --------------------
 * TimeSeriesDemo1.java
 * --------------------
 * (C) Copyright 2002-2005, by Object Refinery Limited.
 *
 */

//package demo;

import java.awt.Color;
import java.text.SimpleDateFormat;

import javax.swing.JPanel;
import java.awt.Point;
import java.awt.geom.Point2D;

import org.jfree.chart.ChartFactory;
import org.jfree.chart.ChartMouseEvent;
import org.jfree.chart.ChartMouseListener;
import org.jfree.chart.ChartPanel;
import org.jfree.chart.ChartRenderingInfo;
import org.jfree.chart.axis.ValueAxis;
import org.jfree.chart.JFreeChart;
import org.jfree.chart.axis.DateAxis;
import org.jfree.chart.plot.XYPlot;
import org.jfree.chart.renderer.xy.XYItemRenderer;
import org.jfree.chart.renderer.xy.XYLineAndShapeRenderer;
import org.jfree.data.time.Month;
import org.jfree.data.time.TimeSeries;
import org.jfree.data.time.TimeSeriesCollection;
import org.jfree.data.time.TimeSeriesDataItem;
import org.jfree.data.xy.XYDataset;
import org.jfree.ui.ApplicationFrame;
import org.jfree.ui.RectangleInsets;
import org.jfree.ui.RefineryUtilities;
import org.jfree.ui.RectangleEdge;
import java.awt.geom.Rectangle2D;
import org.jfree.data.time.Day;
import org.jfree.data.time.Hour;
import org.jfree.data.time.Minute;

import java.util.Date;
import java.text.DateFormat;


/**
 * An example of a time series chart.  For the most part, default settings are
 * used, except that the renderer is modified to show filled shapes (as well as
 * lines) at each data point.
 * <p>
 * IMPORTANT NOTE:  THIS DEMO IS DOCUMENTED IN THE JFREECHART DEVELOPER GUIDE.
 * DO NOT MAKE CHANGES WITHOUT UPDATING THE GUIDE ALSO!!
 */
public class ATimeSeriesTest1 extends ApplicationFrame implements ChartMouseListener {

	JFreeChart chart;
	ChartPanel chartPanel;

    /**
     * A demonstration application showing how to create a simple time series
     * chart.  This example uses monthly data.
     *
     * @param title  the frame title.
     */
    public ATimeSeriesTest1(String title) {
        super(title);
        XYDataset dataset = createDataset();
        chart = createChart(dataset);
        chartPanel = new ChartPanel(chart, false);
        chartPanel.setPreferredSize(new java.awt.Dimension(650, 400));
        chartPanel.setMouseZoomable(true, false);
        this.chartPanel.addChartMouseListener(this);
        setContentPane(chartPanel);
    }

    /**
     * Creates a chart.
     *
     * @param dataset  a dataset.
     *
     * @return A chart.
     */
    private static JFreeChart createChart(XYDataset dataset) {

        JFreeChart chart = ChartFactory.createTimeSeriesChart(
            "Legal & General Unit Trust Prices",  // title
            "Date",             // x-axis label
            "Price Per Unit",   // y-axis label
            dataset,            // data
            true,               // create legend?
            true,               // generate tooltips?
            false               // generate URLs?
        );

        chart.setBackgroundPaint(Color.white);

        XYPlot plot = (XYPlot) chart.getPlot();
        plot.setBackgroundPaint(Color.lightGray);
        plot.setDomainGridlinePaint(Color.white);
        plot.setRangeGridlinePaint(Color.white);
        plot.setAxisOffset(new RectangleInsets(5.0, 5.0, 5.0, 5.0));

        plot.setDomainCrosshairVisible(true);
		plot.setRangeCrosshairVisible(true);


        XYItemRenderer r = plot.getRenderer();
        if (r instanceof XYLineAndShapeRenderer) {
            XYLineAndShapeRenderer renderer = (XYLineAndShapeRenderer) r;
            renderer.setBaseShapesVisible(true);
            renderer.setBaseShapesFilled(true);
        }

        DateAxis axis = (DateAxis) plot.getDomainAxis();
        axis.setDateFormatOverride(new SimpleDateFormat("MMM-yyyy"));

        return chart;

    }
    /**
     * Receives chart mouse click events.
     *
     * @param event  the event.
     */
    public void chartMouseClicked(ChartMouseEvent event) {
        int mouseX = event.getTrigger().getX();
        int mouseY = event.getTrigger().getY();

        System.out.println("SCREEN x = " + mouseX + ", y = " + mouseY);

        Point2D p = this.chartPanel.translateScreenToJava2D(
                new Point(mouseX, mouseY));

        XYPlot plot = (XYPlot) this.chart.getPlot();
        ChartRenderingInfo info = this.chartPanel.getChartRenderingInfo();
        Rectangle2D dataArea = info.getPlotInfo().getDataArea();

        DateAxis domainAxis = (DateAxis)plot.getDomainAxis();
        RectangleEdge domainAxisEdge = plot.getDomainAxisEdge();

        ValueAxis rangeAxis = plot.getRangeAxis();
        RectangleEdge rangeAxisEdge = plot.getRangeAxisEdge();

        double chartX = domainAxis.java2DToValue(p.getX(), dataArea,
                domainAxisEdge);
        double chartY = rangeAxis.java2DToValue(p.getY(), dataArea,
                rangeAxisEdge);
        System.out.println("Chart: x = " + chartX + ", y = " + chartY);

        double xx = plot.getDomainCrosshairValue();
        System.out.println("CROSS HAIR VALUE " + xx);

 		long millis = (long) chartX;
		Date date = new Date(millis);
		DateFormat df = DateFormat.getDateInstance(DateFormat.MEDIUM);
		String formattedDate = df.format(date);
		System.out.println("The  click point Date is " + formattedDate+ "  millis is "+ millis);

///this does not return correct values, crosshair xx value is incorrect

        long millis2 = (long) xx;
		Date date2 = new Date(millis2);

		formattedDate = df.format(date2);
		System.out.println("The crosshair Date is " + formattedDate+ "  millis is "+ millis2);

		TimeSeriesCollection timeSeriesCollection = (TimeSeriesCollection) plot.getDataset(0);

		TimeSeries	timeSeries = timeSeriesCollection.getSeries(0);
		Date timeDate = new Date(millis);

		Day timeDay = new Day (timeDate);

		int itemIndex = timeSeries.getIndex(  timeDay );




		System.out.println("The itemIndex is " + itemIndex);

		TimeSeriesDataItem timeSeriesDataItem  = timeSeries.getDataItem(itemIndex  );
		double value = timeSeriesDataItem.getValue().doubleValue() ;
		System.out.println("The value  is " + value );

		System.out.println("These last values NEVER seem to change no matter where I click.  Help" );


    }

    /**
     * Receives chart mouse moved events.
     *
     * @param event  the event.
     */
    public void chartMouseMoved(ChartMouseEvent event) {
        // ignore
    }



    /**
     * Creates a dataset, consisting of two series of monthly data.
     *
     * @return the dataset.
     */
    private static XYDataset createDataset() {

        TimeSeries s1 = new TimeSeries("L&G European Index Trust", Month.class);
        s1.add(new Month(2, 2001), 181.8);
        s1.add(new Month(3, 2001), 167.3);
        s1.add(new Month(4, 2001), 153.8);
        s1.add(new Month(5, 2001), 167.6);
        s1.add(new Month(6, 2001), 158.8);
        s1.add(new Month(7, 2001), 148.3);
        s1.add(new Month(8, 2001), 153.9);
        s1.add(new Month(9, 2001), 142.7);
        s1.add(new Month(10, 2001), 123.2);
        s1.add(new Month(11, 2001), 131.8);
        s1.add(new Month(12, 2001), 139.6);
        s1.add(new Month(1, 2002), 142.9);
        s1.add(new Month(2, 2002), 138.7);
        s1.add(new Month(3, 2002), 137.3);
        s1.add(new Month(4, 2002), 143.9);
        s1.add(new Month(5, 2002), 139.8);
        s1.add(new Month(6, 2002), 137.0);
        s1.add(new Month(7, 2002), 132.8);

        TimeSeries s2 = new TimeSeries("L&G UK Index Trust", Month.class);
        s2.add(new Month(2, 2001), 129.6);
        s2.add(new Month(3, 2001), 123.2);
        s2.add(new Month(4, 2001), 117.2);
        s2.add(new Month(5, 2001), 124.1);
        s2.add(new Month(6, 2001), 122.6);
        s2.add(new Month(7, 2001), 119.2);
        s2.add(new Month(8, 2001), 116.5);
        s2.add(new Month(9, 2001), 112.7);
        s2.add(new Month(10, 2001), 101.5);
        s2.add(new Month(11, 2001), 106.1);
        s2.add(new Month(12, 2001), 110.3);
        s2.add(new Month(1, 2002), 111.7);
        s2.add(new Month(2, 2002), 111.0);
        s2.add(new Month(3, 2002), 109.6);
        s2.add(new Month(4, 2002), 113.2);
        s2.add(new Month(5, 2002), 111.6);
        s2.add(new Month(6, 2002), 108.8);
        s2.add(new Month(7, 2002), 101.6);

        TimeSeriesCollection dataset = new TimeSeriesCollection();
        dataset.addSeries(s1);
        dataset.addSeries(s2);

        return dataset;

    }

    /**
     * Creates a panel for the demo (used by SuperDemo.java).
     *
     * @return A panel.
     */
    public static JPanel createDemoPanel() {
        JFreeChart chart = createChart(createDataset());
        return new ChartPanel(chart);
    }

    /**
     * Starting point for the demonstration application.
     *
     * @param args  ignored.
     */
    public static void main(String[] args) {

        ATimeSeriesTest1 demo = new ATimeSeriesTest1("ATimeSeriesTest1");
        demo.pack();
        RefineryUtilities.centerFrameOnScreen(demo);
        demo.setVisible(true);

    }

}

lia
Posts: 18
Joined: Sat Oct 14, 2006 5:02 am
Location: Victoria BC

Post by lia » Thu Aug 02, 2007 4:20 am

I have found part of the problem. The dataset was using a RegularTimePeriod of Month and I was creating a Day in the ChartMouseListener. When I changed the code and recompiled I noticed that the index that is returned is consistently 1 greater than what it should be. I guess I can deal with that. ..It means that I won't be able to return the first value though. I'll deal with the null pointer exception but the user will never be able to click to get its value. :cry:

wzwei28
Posts: 105
Joined: Wed Mar 16, 2005 9:17 am
Location: Malaysia, Earth
Contact:

Post by wzwei28 » Fri Oct 12, 2007 3:23 pm

Simple algorithm/patch/source code available at following link:
http://www.jfree.org/phpBB2/viewtopic.php?p=64888#64888

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