/* ===========================================================

 * JFreeChart : a free chart library for the Java(tm) platform

 * ===========================================================

 *

 * (C) Copyright 2000-2004, by Object Refinery Limited and Contributors.

 *

 * Project Info:  http://www.jfree.org/jfreechart/index.html

 *

 * This library is free software; you can redistribute it and/or modify it under the terms

 * of the GNU Lesser General Public License as published by the Free Software Foundation;

 * either version 2.1 of the License, or (at your option) any later version.

 *

 * This library is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;

 * without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

 * See the GNU Lesser General Public License for more details.

 *

 * You should have received a copy of the GNU Lesser General Public License along with this

 * library; if not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330,

 * Boston, MA 02111-1307, USA.

 *

 * [Java is a trademark or registered trademark of Sun Microsystems, Inc. 

 * in the United States and other countries.]

 *

 * ---------------------

 * ScatterPlotTests.java

 * ---------------------

 * (C) Copyright 2002-2004, by Object Refinery Limited.

 *

 * Original Author:  David Gilbert (for Object Refinery Limited);

 * Contributor(s):   -;

 *

 * $Id: ScatterPlotTests.java,v 1.1 2004/08/31 14:35:34 mungady Exp $

 *

 * Changes:

 * --------

 * 11-Jun-2002 : Version 1 (DG);

 * 17-Oct-2002 : Fixed errors reported by Checkstyle (DG);

 *

 */



package org.jfree.chart.junit;



import java.awt.Graphics2D;

import java.awt.geom.Rectangle2D;

import java.awt.image.BufferedImage;



import junit.framework.Test;

import junit.framework.TestCase;

import junit.framework.TestSuite;



import org.jfree.chart.ChartFactory;

import org.jfree.chart.JFreeChart;

import org.jfree.chart.axis.ValueAxis;

import org.jfree.chart.event.ChartChangeEvent;

import org.jfree.chart.event.ChartChangeListener;

import org.jfree.chart.plot.PlotOrientation;

import org.jfree.data.Range;

import org.jfree.data.xy.XYDataset;

import org.jfree.data.xy.XYSeries;

import org.jfree.data.xy.XYSeriesCollection;



/**

 * Tests for a scatter plot.

 *

 */

public class ScatterPlotTests extends TestCase {



    /** A chart. */

    private JFreeChart chart;



    /**

     * Returns the tests as a test suite.

     *

     * @return the test suite.

     */

    public static Test suite() {

        return new TestSuite(ScatterPlotTests.class);

    }



    /**

     * Constructs a new set of tests.

     *

     * @param name  the name of the tests.

     */

    public ScatterPlotTests(String name) {

        super(name);

    }



    /**

     * Common test setup.

     */

    protected void setUp() {



        this.chart = createChart();



    }



    /**

     * Draws the chart with a null info object to make sure that no exceptions are thrown (a

     * problem that was occurring at one point).

     */

    public void testDrawWithNullInfo() {



        boolean success = false;



        try {

            BufferedImage image = new BufferedImage(200 , 100, BufferedImage.TYPE_INT_RGB);

            Graphics2D g2 = image.createGraphics();

            this.chart.draw(g2, new Rectangle2D.Double(0, 0, 200, 100), null, null);

            g2.dispose();

            success = true;

        }

        catch (Exception e) {

          success = false;

          e.printStackTrace();

        }



        assertTrue(success);



    }



    /**

     * Replaces the dataset and checks that it has changed as expected.

     */

    public void testReplaceDataset() {



        // create a dataset...

        XYSeries series1 = new XYSeries("Series 1");

        series1.add(10.0, 10.0);

        series1.add(20.0, 20.0);

        series1.add(30.0, 30.0);

        XYDataset dataset = new XYSeriesCollection(series1);



        LocalListener l = new LocalListener();

        this.chart.addChangeListener(l);

        this.chart.getXYPlot().setDataset(dataset);

        assertEquals(true, l.flag);

        ValueAxis axis = this.chart.getXYPlot().getRangeAxis();

        Range range = axis.getRange();

        assertTrue("Expecting the lower bound of the range to be around 10: "

                   + range.getLowerBound(), range.getLowerBound() <= 10);

        assertTrue("Expecting the upper bound of the range to be around 30: "

                   + range.getUpperBound(), range.getUpperBound() >= 30);



    }



    /**

     * Create a horizontal bar chart with sample data in the range -3 to +3.

     *

     * @return the chart.

     */

    private static JFreeChart createChart() {



        // create a dataset...

        XYSeries series1 = new XYSeries("Series 1");

        series1.add(1.0, 1.0);

        series1.add(2.0, 2.0);

        series1.add(3.0, 3.0);

        XYDataset dataset = new XYSeriesCollection(series1);



        // create the chart...

        return ChartFactory.createScatterPlot(

            "Scatter Plot",  // chart title

            "Domain",

            "Range",

            dataset,         // data

            PlotOrientation.VERTICAL,

            true,            // include legend

            true,            // tooltips

            false            // urls

        );



    }



    /**

     * A chart change listener.

     *

     */

    static class LocalListener implements ChartChangeListener {



        /** A flag. */

        private boolean flag = false;



        /**

         * Event handler.

         *

         * @param event  the event.

         */

        public void chartChanged(ChartChangeEvent event) {

            this.flag = true;

        }



    }



}

