org.jfree.data.general.DefaultPieDataset Java Examples

/**
 * Starts an element.
 *
 * @param namespaceURI  the namespace.
 * @param localName  the element name.
 * @param qName  the element name.
 * @param atts  the element attributes.
 *
 * @throws SAXException for errors.
 */
public void startElement(String namespaceURI,
                         String localName,
                         String qName,
                         Attributes atts) throws SAXException {

    DefaultHandler current = getCurrentHandler();
    if (current != this) {
        current.startElement(namespaceURI, localName, qName, atts);
    }
    else if (qName.equals(PIEDATASET_TAG)) {
        this.dataset = new DefaultPieDataset();
    }
    else if (qName.equals(ITEM_TAG)) {
        ItemHandler subhandler = new ItemHandler(this, this);
        getSubHandlers().push(subhandler);
        subhandler.startElement(namespaceURI, localName, qName, atts);
    }

}
 

/**
 * Confirm that the equals method can distinguish all the required fields.
 */
@Test
public void testEquals() {
    StandardEntityCollection c1 = new StandardEntityCollection();
    StandardEntityCollection c2 = new StandardEntityCollection();
    assertTrue(c1.equals(c2));

    PieSectionEntity e1 = new PieSectionEntity(new Rectangle2D.Double(1.0,
            2.0, 3.0, 4.0), new DefaultPieDataset(), 0, 1, "Key",
            "ToolTip", "URL");
    c1.add(e1);
    assertFalse(c1.equals(c2));
    PieSectionEntity e2 = new PieSectionEntity(new Rectangle2D.Double(1.0,
            2.0, 3.0, 4.0), new DefaultPieDataset(), 0, 1, "Key",
            "ToolTip", "URL");
    c2.add(e2);
    assertTrue(c1.equals(c2));
}
 

/**
 * 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);
}
 

/**
 * Draws a pie chart where the label generator returns null.
 */
@Test
public void testDrawWithNullLegendLabels() {
    DefaultPieDataset dataset = new DefaultPieDataset();
    dataset.setValue("L1", 12.0);
    dataset.setValue("L2", 11.0);
    JFreeChart chart = ChartFactory.createPieChart("Test", dataset, true,
            false, false);
    PiePlot plot = (PiePlot) chart.getPlot();
    plot.setLegendLabelGenerator(new NullLegendLabelGenerator());
    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 (Exception e) {
      success = false;
    }
    assertTrue(success);
}
 

/**
 * Common test setup.
 */
protected void setUp() {

    // create a dataset...
    DefaultPieDataset data = new DefaultPieDataset();
    data.setValue("Java", new Double(43.2));
    data.setValue("Visual Basic", new Double(0.0));
    data.setValue("C/C++", new Double(17.5));

    // create the chart...
    this.pieChart = ChartFactory.createPieChart(
        "Pie Chart",  // chart title
        data,         // data
        true,         // include legend
        true,
        false
    );

}
 

/**
 * Draws a pie chart where the label generator returns null.
 */
@Test
public void testDrawWithNullLegendLabels() {
    DefaultPieDataset dataset = new DefaultPieDataset();
    dataset.setValue("L1", 12.0);
    dataset.setValue("L2", 11.0);
    JFreeChart chart = ChartFactory.createPieChart("Test", dataset, true,
            false, false);
    PiePlot plot = (PiePlot) chart.getPlot();
    plot.setLegendLabelGenerator(new NullLegendLabelGenerator());
    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 (Exception e) {
      success = false;
    }
    assertTrue(success);
}
 

/**
 * Confirm that cloning works.
 */
@Test
public void testCloning() throws CloneNotSupportedException {
    PieSectionEntity e1 = new PieSectionEntity(new Rectangle2D.Double(1.0,
            2.0, 3.0, 4.0), new DefaultPieDataset(), 0, 1, "Key",
            "ToolTip", "URL");
    StandardEntityCollection c1 = new StandardEntityCollection();
    c1.add(e1);
    StandardEntityCollection c2 = (StandardEntityCollection) c1.clone();
    assertTrue(c1 != c2);
    assertTrue(c1.getClass() == c2.getClass());
    assertTrue(c1.equals(c2));

    // check independence
    c1.clear();
    assertFalse(c1.equals(c2));
    c2.clear();
    assertTrue(c1.equals(c2));
}
 

public void makeChartByMap(Map<String, Object> map,String title) {
    DefaultPieDataset dpd = new DefaultPieDataset(); //建立一个默认的饼图
    System.out.println(map);

    dpd.setValue("优", Integer.parseInt(map.get("优").toString()));
    dpd.setValue("良", Integer.parseInt(map.get("良").toString()));
    dpd.setValue("中", Integer.parseInt(map.get("中").toString()));
    dpd.setValue("差", Integer.parseInt(map.get("差").toString()));
    dpd.setValue("不及格", Integer.parseInt(map.get("不及格").toString()));

    JFreeChart chart = ChartFactory.createPieChart(title, dpd, true, true, false);
    PiePlot piePlot = (PiePlot) chart.getPlot();
    piePlot.setLabelGenerator(new StandardPieSectionLabelGenerator(("{0}:({2})"), NumberFormat.getNumberInstance(), new DecimalFormat("0.00%")));
    //可以查具体的API文档,第一个参数是标题，第二个参数是一个数据集，第三个参数表示是否显示Legend，第四个参数表示是否显示提示，第五个参数表示图中是否存在URL
    ChartFrame chartFrame = new ChartFrame(title, chart);
    //chart要放在Java容器组件中，ChartFrame继承自java的Jframe类。该第一个参数的数据是放在窗口左上角的，不是正中间的标题。
    chartFrame.pack(); //以合适的大小展现图形
    chartFrame.setVisible(true);//图形是否可见
}
 

/**
 * Starts an element.
 *
 * @param namespaceURI  the namespace.
 * @param localName  the element name.
 * @param qName  the element name.
 * @param atts  the element attributes.
 *
 * @throws SAXException for errors.
 */
@Override
public void startElement(String namespaceURI,
                         String localName,
                         String qName,
                         Attributes atts) throws SAXException {

    DefaultHandler current = getCurrentHandler();
    if (current != this) {
        current.startElement(namespaceURI, localName, qName, atts);
    }
    else if (qName.equals(PIEDATASET_TAG)) {
        this.dataset = new DefaultPieDataset();
    }
    else if (qName.equals(ITEM_TAG)) {
        ItemHandler subhandler = new ItemHandler(this, this);
        getSubHandlers().push(subhandler);
        subhandler.startElement(namespaceURI, localName, qName, atts);
    }

}
 

/**
 * Confirm that the equals method can distinguish all the required fields.
 */
public void testEquals() {
    StandardEntityCollection c1 = new StandardEntityCollection();
    StandardEntityCollection c2 = new StandardEntityCollection();
    assertTrue(c1.equals(c2));
    
    PieSectionEntity e1 = new PieSectionEntity(new Rectangle2D.Double(1.0, 
            2.0, 3.0, 4.0), new DefaultPieDataset(), 0, 1, "Key", 
            "ToolTip", "URL");
    c1.add(e1);
    assertFalse(c1.equals(c2));
    PieSectionEntity e2 = new PieSectionEntity(new Rectangle2D.Double(1.0, 
            2.0, 3.0, 4.0), new DefaultPieDataset(), 0, 1, "Key", 
            "ToolTip", "URL");
    c2.add(e2);
    assertTrue(c1.equals(c2));        
}
 

/**
 * Confirm that the equals method can distinguish all the required fields.
 */
@Test
public void testEquals() {
    StandardEntityCollection c1 = new StandardEntityCollection();
    StandardEntityCollection c2 = new StandardEntityCollection();
    assertTrue(c1.equals(c2));

    PieSectionEntity e1 = new PieSectionEntity(new Rectangle2D.Double(1.0,
            2.0, 3.0, 4.0), new DefaultPieDataset(), 0, 1, "Key",
            "ToolTip", "URL");
    c1.add(e1);
    assertFalse(c1.equals(c2));
    PieSectionEntity e2 = new PieSectionEntity(new Rectangle2D.Double(1.0,
            2.0, 3.0, 4.0), new DefaultPieDataset(), 0, 1, "Key",
            "ToolTip", "URL");
    c2.add(e2);
    assertTrue(c1.equals(c2));
}
 

/**
 * Creates a pie chart.
 *
 * @return The pie chart.
 */
private static JFreeChart createPieChart() {
    // create a dataset...
    DefaultPieDataset data = new DefaultPieDataset();
    data.setValue("Java", new Double(43.2));
    data.setValue("Visual Basic", new Double(0.0));
    data.setValue("C/C++", new Double(17.5));

    // create the chart...
    return ChartFactory.createPieChart("Pie Chart",  // chart title
                                       data,         // data
                                       true,         // include legend
                                       true,
                                       false
                                       );
}
 

@Secured({"ROLE_ADMIN","ROLE_SURVEY_ADMIN"})
private PieDataset createDataset(Long questionId, Long recordCount)	{
	try{
		String columnValue=""; 
		Question question = surveySettingsService.question_findById(questionId);
		List<QuestionStatistic> questionStatistics =surveyService.questionStatistic_getStatistics(question,recordCount);
		DefaultPieDataset defaultPieDataset = new  DefaultPieDataset ();
		for (QuestionStatistic questionStatistic: questionStatistics) {
			//double percentage = ((double)questionStatistic.getCount()/(double)recordCount) * 100;
			//percentage = Double.valueOf(new DecimalFormat("#.##").format(percentage));
			defaultPieDataset.setValue(questionStatistic.getEntry(), questionStatistic.getFrequency() *100);
		}
		return defaultPieDataset;
	} catch (Exception e) {
		log.error(e.getMessage(),e);
		throw (new RuntimeException(e));
	}
}
 

/**
 * Confirm that cloning works.
 */
@Test
public void testCloning() throws CloneNotSupportedException {
    PieSectionEntity e1 = new PieSectionEntity(new Rectangle2D.Double(1.0,
            2.0, 3.0, 4.0), new DefaultPieDataset(), 0, 1, "Key",
            "ToolTip", "URL");
    StandardEntityCollection c1 = new StandardEntityCollection();
    c1.add(e1);
    StandardEntityCollection c2 = (StandardEntityCollection) c1.clone();
    assertTrue(c1 != c2);
    assertTrue(c1.getClass() == c2.getClass());
    assertTrue(c1.equals(c2));

    // check independence
    c1.clear();
    assertFalse(c1.equals(c2));
    c2.clear();
    assertTrue(c1.equals(c2));
}
 

protected void buildDataset() {
  final DefaultPieDataset localPieDataset = (DefaultPieDataset) getDataSet();
  final Comparable seriesComparable = querySeriesValue( 0 );
  if ( seriesComparable == null ) {
    return;
  }

  final Object valueObject = getDataRow().get( getValueColumn() );
  final Number value = ( valueObject instanceof Number ) ? (Number) valueObject : null;
  final Number existingValue =
    CollectorFunctionUtil.queryExistingValueFromDataSet( localPieDataset, seriesComparable );
  if ( existingValue != null ) {
    if ( value != null ) {
      localPieDataset.setValue( seriesComparable, CollectorFunctionUtil.add( existingValue, value ) );
    }
  } else {
    localPieDataset.setValue( seriesComparable, value );
  }
}
 

/**
 * Starts an element.
 *
 * @param namespaceURI  the namespace.
 * @param localName  the element name.
 * @param qName  the element name.
 * @param atts  the element attributes.
 *
 * @throws SAXException for errors.
 */
@Override
public void startElement(String namespaceURI,
                         String localName,
                         String qName,
                         Attributes atts) throws SAXException {

    DefaultHandler current = getCurrentHandler();
    if (current != this) {
        current.startElement(namespaceURI, localName, qName, atts);
    }
    else if (qName.equals(PIEDATASET_TAG)) {
        this.dataset = new DefaultPieDataset();
    }
    else if (qName.equals(ITEM_TAG)) {
        ItemHandler subhandler = new ItemHandler(this, this);
        getSubHandlers().push(subhandler);
        subhandler.startElement(namespaceURI, localName, qName, atts);
    }

}
 

/**
 * Confirm that the equals method can distinguish all the required fields.
 */
@Test
public void testEquals() {
    StandardEntityCollection c1 = new StandardEntityCollection();
    StandardEntityCollection c2 = new StandardEntityCollection();
    assertTrue(c1.equals(c2));

    PieSectionEntity e1 = new PieSectionEntity(new Rectangle2D.Double(1.0,
            2.0, 3.0, 4.0), new DefaultPieDataset(), 0, 1, "Key",
            "ToolTip", "URL");
    c1.add(e1);
    assertFalse(c1.equals(c2));
    PieSectionEntity e2 = new PieSectionEntity(new Rectangle2D.Double(1.0,
            2.0, 3.0, 4.0), new DefaultPieDataset(), 0, 1, "Key",
            "ToolTip", "URL");
    c2.add(e2);
    assertTrue(c1.equals(c2));
}
 

public void testPieURL() throws Exception {
  DebugExpressionRuntime runtime = new DebugExpressionRuntime();
  FormulaPieURLGenerator gen = new FormulaPieURLGenerator( runtime, "=[chart::item]" );

  DefaultPieDataset dataSet = new DefaultPieDataset();
  dataSet.setValue( "Key-1", 5 );
  dataSet.setValue( "Key-2", 7 );
  dataSet.setValue( "Key-3", 10 );
  assertEquals( "5.0", gen.generateURL( dataSet, "Key-1", 0 ) );
  assertEquals( "7.0", gen.generateURL( dataSet, "Key-2", 1 ) );
  assertEquals( "10.0", gen.generateURL( dataSet, "Key-3", 2 ) );
}
 

/**
 * Creates a pie chart.
 *
 * @return The pie chart.
 */
private static JFreeChart createPieChart() {
    DefaultPieDataset data = new DefaultPieDataset();
    data.setValue("Java", new Double(43.2));
    data.setValue("Visual Basic", new Double(0.0));
    data.setValue("C/C++", new Double(17.5));
    return ChartFactory.createPieChart("Pie Chart", data);
}
 

@Test
public void testBug1126_c() throws CloneNotSupportedException {
    DefaultPieDataset dataset1 = new DefaultPieDataset();
    PiePlot plot1 = new PiePlot(dataset1);
    plot1.setSectionOutlineStroke("A", new BasicStroke(5.0f));
    plot1.setSectionOutlineStroke("B", new BasicStroke(6.0f));
    PiePlot plot2 = (PiePlot) plot1.clone();
    plot2.setSectionOutlineStroke("A", new BasicStroke(7.0f));
    plot2.setSectionOutlineStroke("B", new BasicStroke(8.0f));
    assertEquals(new BasicStroke(5.0f), plot1.getSectionOutlineStroke("A"));
    assertEquals(new BasicStroke(6.0f), plot1.getSectionOutlineStroke("B"));
    assertEquals(new BasicStroke(7.0f), plot2.getSectionOutlineStroke("A"));
    assertEquals(new BasicStroke(8.0f), plot2.getSectionOutlineStroke("B"));
}
 

/**
 * Creates a sample dataset for the demo.
 *
 * @return A sample dataset.
 */
private PieDataset createSampleDataset(final int[] votes)
{
  final DefaultPieDataset result = new DefaultPieDataset();
  // cheating: java has a higher chance to be the best language :)
  result.setValue("Java", new Integer(votes[0]));
  result.setValue("Visual Basic", new Integer(votes[1]));
  result.setValue("C/C++", new Integer(votes[2]));
  result.setValue("PHP", new Integer(votes[3]));
  result.setValue("Perl", new Integer(votes[4]));
  return result;
}
 

@Test
public void testBug1126() throws CloneNotSupportedException {
    DefaultPieDataset dataset1 = new DefaultPieDataset();
    PiePlot plot1 = new PiePlot(dataset1);
    plot1.setSectionPaint("A", Color.RED);
    plot1.setSectionPaint("B", Color.GREEN);
    PiePlot plot2 = (PiePlot) plot1.clone();
    plot2.setSectionPaint("A", Color.BLUE);
    plot2.setSectionPaint("B", Color.YELLOW);
    assertEquals(Color.RED, plot1.getSectionPaint("A"));
    assertEquals(Color.GREEN, plot1.getSectionPaint("B"));
    assertEquals(Color.BLUE, plot2.getSectionPaint("A"));
    assertEquals(Color.YELLOW, plot2.getSectionPaint("B"));
}
 

/**
 * Some checks for the getSubtitles() method.
 */
@Test
public void testGetSubtitles() {
    DefaultPieDataset dataset = new DefaultPieDataset();
    JFreeChart chart = ChartFactory.createPieChart("title", dataset);
    List subtitles = chart.getSubtitles();

    assertEquals(1, chart.getSubtitleCount());

    // adding something to the returned list should NOT change the chart
    subtitles.add(new TextTitle("T"));
    assertEquals(1, chart.getSubtitleCount());
}
 

/**
 * Some checks for the default legend firing change events.
 */
@Test
public void testLegendEvents() {
    DefaultPieDataset dataset = new DefaultPieDataset();
    JFreeChart chart = ChartFactory.createPieChart("title", dataset);
    chart.addChangeListener(this);
    this.lastChartChangeEvent = null;
    LegendTitle legend = chart.getLegend();
    legend.setPosition(RectangleEdge.TOP);
    assertNotNull(this.lastChartChangeEvent);
}
 

/**
 * Some checks for title changes and event notification.
 */
@Test
public void testTitleChangeEvent() {
    DefaultPieDataset dataset = new DefaultPieDataset();
    JFreeChart chart = ChartFactory.createPieChart("title", dataset);
    chart.addChangeListener(this);
    this.lastChartChangeEvent = null;
    TextTitle t = chart.getTitle();
    t.setFont(new Font("Dialog", Font.BOLD, 9));
    assertNotNull(this.lastChartChangeEvent);
    this.lastChartChangeEvent = null;

    // now create a new title and replace the existing title, several
    // things should happen:
    // (1) Adding the new title should trigger an immediate
    //     ChartChangeEvent;
    // (2) Modifying the new title should trigger a ChartChangeEvent;
    // (3) Modifying the old title should NOT trigger a ChartChangeEvent
    TextTitle t2 = new TextTitle("T2");
    chart.setTitle(t2);
    assertNotNull(this.lastChartChangeEvent);
    this.lastChartChangeEvent = null;

    t2.setFont(new Font("Dialog", Font.BOLD, 9));
    assertNotNull(this.lastChartChangeEvent);
    this.lastChartChangeEvent = null;

    t.setFont(new Font("Dialog", Font.BOLD, 9));
    assertNull(this.lastChartChangeEvent);
    this.lastChartChangeEvent = null;
}
 

/**
 * Serialize a pie chart, restore it, and check for equality.
 */
@Test
public void testSerialization1() {
    DefaultPieDataset data = new DefaultPieDataset();
    data.setValue("Type 1", 54.5);
    data.setValue("Type 2", 23.9);
    data.setValue("Type 3", 45.8);

    JFreeChart c1 = ChartFactory.createPieChart("Test", data);
    JFreeChart c2 = (JFreeChart) TestUtilities.serialised(c1);
    assertEquals(c1, c2);
    LegendTitle lt2 = c2.getLegend();
    assertSame(lt2.getSources()[0], c2.getPlot());
}
 

@Test
public void testBug1126() throws CloneNotSupportedException {
    DefaultPieDataset dataset1 = new DefaultPieDataset();
    PiePlot plot1 = new PiePlot(dataset1);
    plot1.setSectionPaint("A", Color.RED);
    plot1.setSectionPaint("B", Color.GREEN);
    PiePlot plot2 = (PiePlot) plot1.clone();
    plot2.setSectionPaint("A", Color.BLUE);
    plot2.setSectionPaint("B", Color.YELLOW);
    assertEquals(Color.RED, plot1.getSectionPaint("A"));
    assertEquals(Color.GREEN, plot1.getSectionPaint("B"));
    assertEquals(Color.BLUE, plot2.getSectionPaint("A"));
    assertEquals(Color.YELLOW, plot2.getSectionPaint("B"));
}
 

@Test
public void testBug1126_b() throws CloneNotSupportedException {
    DefaultPieDataset dataset1 = new DefaultPieDataset();
    PiePlot plot1 = new PiePlot(dataset1);
    plot1.setSectionOutlinePaint("A", Color.RED);
    plot1.setSectionOutlinePaint("B", Color.GREEN);
    PiePlot plot2 = (PiePlot) plot1.clone();
    plot2.setSectionOutlinePaint("A", Color.BLUE);
    plot2.setSectionOutlinePaint("B", Color.YELLOW);
    assertEquals(Color.RED, plot1.getSectionOutlinePaint("A"));
    assertEquals(Color.GREEN, plot1.getSectionOutlinePaint("B"));
    assertEquals(Color.BLUE, plot2.getSectionOutlinePaint("A"));
    assertEquals(Color.YELLOW, plot2.getSectionOutlinePaint("B"));
}
 

/**
 * Tests that no exceptions are thrown when there is a <code>null</code>
 * value in the dataset.
 */
@Test
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);
    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();
    //FIXME we should really assert a value here
}
 

/**
 * Common test setup.
 */
@Before
public 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);
}