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

 * 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.]

 *

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

 * PieChart3DTests.java

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

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

 *

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

 * Contributor(s):   -;

 *

 * $Id: PieChart3DTests.java,v 1.1 2004/08/31 14:35:34 mungady Exp $

 *

 * Changes:

 * --------

 * 21-May-2004 : Version 1 (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.event.ChartChangeEvent;

import org.jfree.chart.event.ChartChangeListener;

import org.jfree.chart.plot.PiePlot;

import org.jfree.data.general.DefaultPieDataset;

import org.jfree.data.general.PieDataset;



/**

 * Tests for a pie chart with a 3D effect.

 */

public class PieChart3DTests extends TestCase {



    /** A chart. */

    private JFreeChart pieChart;



    /**

     * Returns the tests as a test suite.

     *

     * @return The test suite.

     */

    public static Test suite() {

        return new TestSuite(PieChart3DTests.class);

    }



    /**

     * Constructs a new set of tests.

     *

     * @param name  the name of the tests.

     */

    public PieChart3DTests(String name) {

        super(name);

    }



    /**

     * Common test setup.

     */

    protected void setUp() {

        // create a dataset...

        DefaultPieDataset dataset = new DefaultPieDataset();

        dataset.setValue("Java", new Double(43.2));

        dataset.setValue("Visual Basic", new Double(0.0));

        dataset.setValue("C/C++", new Double(17.5));

        this.pieChart = createPieChart3D(dataset);

    }



    /**

     * Using a regular pie chart, we replace the dataset with null.  Expect to receive notification

     * of a chart change event, and (of course) the dataset should be null.

     */

    public void testReplaceDatasetOnPieChart() {

        LocalListener l = new LocalListener();

        this.pieChart.addChangeListener(l);

        PiePlot plot = (PiePlot) this.pieChart.getPlot();

        plot.setDataset(null);

        assertEquals(true, l.flag);

        assertNull(plot.getDataset());

    }



    /**

     * Tests that no exceptions are thrown when there is a <code>null</code> value in the dataset.

     */

    public void testNullValueInDataset() {

        DefaultPieDataset dataset = new DefaultPieDataset();

        dataset.setValue("Section 1", 10.0);

        dataset.setValue("Section 2", 11.0);

        dataset.setValue("Section 3", null);

        JFreeChart chart = createPieChart3D(dataset);

        boolean success = false;

        try {

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

            Graphics2D g2 = image.createGraphics();

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

            g2.dispose();

            success = true;

        }

        catch (Throwable t) {

            success = false;

        }

        assertTrue(success);

    }

    

    /**

     * Creates a pie chart.

     *

     * @param dataset  the dataset.

     * 

     * @return The pie chart.

     */

    private static JFreeChart createPieChart3D(PieDataset dataset) {



        return ChartFactory.createPieChart3D(

            "Pie Chart",  // chart title

            dataset,      // data

            true,         // include legend

            true,

            false

        );

    }



    /**

     * 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;

        }



    }



}

