鼠标拖动来修改JFreeChart 节点上的值

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package zhipu.view.xulie;import java.awt.Color;import java.awt.Dimension;import java.awt.Font;import java.awt.Point;import java.awt.event.MouseEvent;import java.awt.event.MouseListener;import java.awt.event.MouseMotionListener;import java.awt.geom.Point2D;import java.awt.geom.Rectangle2D;import java.text.SimpleDateFormat;import javax.swing.JPanel;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.JFreeChart;import org.jfree.chart.axis.DateAxis;import org.jfree.chart.axis.DateTickUnit;import org.jfree.chart.axis.ValueAxis;import org.jfree.chart.entity.XYItemEntity;import org.jfree.chart.plot.ValueMarker;import org.jfree.chart.plot.XYPlot;import org.jfree.chart.renderer.xy.XYLineAndShapeRenderer;import org.jfree.chart.title.LegendTitle;import org.jfree.chart.title.TextTitle;import org.jfree.data.time.Day;import org.jfree.data.time.Hour;import org.jfree.data.time.TimeSeries;import org.jfree.data.time.TimeSeriesCollection;import org.jfree.data.xy.XYDataset;import org.jfree.ui.ApplicationFrame;import org.jfree.ui.RectangleEdge;import org.jfree.ui.RefineryUtilities;public class TimeSeriesTest extends ApplicationFrame implements ChartMouseListener, MouseListener, MouseMotionListener{   private static final long serialVersionUID = 1L;   private JFreeChart chart;   private ChartPanel chartPanel;   private boolean domainCrosshairState;   private XYItemEntity xyItemEntity;   private boolean isDraged;      public TimeSeriesTest(String str){      super(str);      XYDataset localXYDataset = createDataset();      chart = createChart(localXYDataset);      chartPanel = new ChartPanel(chart);      chartPanel.setPreferredSize(new Dimension(800, 500));      // chartPanel.setMouseZoomable(true, false);      chartPanel.setMouseZoomable(false);      chartPanel.addChartMouseListener(this);      chartPanel.addMouseListener(this);      chartPanel.addMouseMotionListener(this);      domainCrosshairState = false;      isDraged = false;      setContentPane(chartPanel);   }   private static XYDataset createDataset(){      Day localDay = new Day();      TimeSeries localTimeSeries1 = new TimeSeries("随机数据", Hour.class);      localTimeSeries1.add(new Hour(0, localDay), 520.2D);      localTimeSeries1.add(new Hour(2, localDay), 575.1D);      localTimeSeries1.add(new Hour(4, localDay), 564.4D);      localTimeSeries1.add(new Hour(6, localDay), 540.2D);      localTimeSeries1.add(new Hour(8, localDay), 530.2D);      localTimeSeries1.add(new Hour(10, localDay), 555.2D);      localTimeSeries1.add(new Hour(12, localDay), 580.4D);      localTimeSeries1.add(new Hour(14, localDay), 583.2D);      localTimeSeries1.add(new Hour(16, localDay), 595.2D);      localTimeSeries1.add(new Hour(18, localDay), 564.4D);      localTimeSeries1.add(new Hour(20, localDay), 523.2D);      localTimeSeries1.add(new Hour(22, localDay), 515.2D);      localTimeSeries1.add(new Hour(24, localDay), 530.4D);      TimeSeries localTimeSeries2 = new TimeSeries("随机数据", Hour.class);      localTimeSeries2.add(new Hour(0, localDay), 620.2D);      localTimeSeries2.add(new Hour(2, localDay), 654.1D);      localTimeSeries2.add(new Hour(4, localDay), 664.4D);      localTimeSeries2.add(new Hour(6, localDay), 670.2D);      localTimeSeries2.add(new Hour(8, localDay), 690.2D);      localTimeSeries2.add(new Hour(10, localDay), 695.2D);      localTimeSeries2.add(new Hour(12, localDay), 680.4D);      localTimeSeries2.add(new Hour(14, localDay), 683.2D);      localTimeSeries2.add(new Hour(16, localDay), 695.2D);      localTimeSeries2.add(new Hour(18, localDay), 714.4D);      localTimeSeries2.add(new Hour(20, localDay), 723.2D);      localTimeSeries2.add(new Hour(22, localDay), 715.2D);      localTimeSeries2.add(new Hour(24, localDay), 680.4D);      TimeSeriesCollection localTimeSeriesCollection = new TimeSeriesCollection();      localTimeSeriesCollection.addSeries(localTimeSeries1);      localTimeSeriesCollection.addSeries(localTimeSeries2);      return localTimeSeriesCollection;   }   private static JFreeChart createChart(XYDataset xyDataset){      JFreeChart localChart = ChartFactory.createTimeSeriesChart("时间序列测试", "时间", "数值", xyDataset, true, true, false);      TextTitle title = localChart.getTitle();      title.setFont(new Font("宋体", Font.BOLD, 24));      LegendTitle legend = localChart.getLegend();      legend.setItemFont(new Font("宋体", Font.ITALIC, 14));      XYPlot plot = (XYPlot)localChart.getPlot();      plot.setBackgroundPaint(null);      // X轴      DateAxis xAxis = (DateAxis)plot.getDomainAxis();      xAxis.setLabelFont(new Font("宋体", Font.PLAIN, 18));      xAxis.setLabelPaint(Color.BLUE);      SimpleDateFormat fmt = new SimpleDateFormat("k:mm");      xAxis.setTickUnit(new DateTickUnit(DateTickUnit.HOUR, 2, fmt));      // Y轴      ValueAxis yAxis = plot.getRangeAxis();      yAxis.setLabelFont(new Font("宋体", Font.PLAIN, 18));      yAxis.setLabelPaint(Color.BLUE);      return localChart;   }   public static JPanel createDemoPanel(){      JFreeChart chart = createChart(createDataset());      return new ChartPanel(chart);   }   public void chartMouseClicked(ChartMouseEvent e){      if(e.getTrigger().getClickCount() == 2){         domainCrosshairState = !domainCrosshairState;         // plot.setDomainCrosshairVisible(domainCrosshairState);          chartPanel.setHorizontalAxisTrace(domainCrosshairState); // 双击竖线      }      try{//放在try块中可避免弹出异常提示，目前还没有找到得到XYItemEntity对象的好办法         xyItemEntity = (XYItemEntity)e.getEntity();      }      catch(Exception ee){ee.printStackTrace();      }      if(xyItemEntity == null) return;      int seriesIndex = xyItemEntity.getSeriesIndex();      XYPlot xyPlot = (XYPlot)chart.getPlot();      XYLineAndShapeRenderer xyLineAndShapeRenderer = (XYLineAndShapeRenderer)xyPlot.getRenderer();      for(int index = 0; index < xyItemEntity.getDataset().getSeriesCount(); index++){         xyLineAndShapeRenderer.setSeriesShapesVisible(index, false);      }      xyLineAndShapeRenderer.setSeriesShapesVisible(seriesIndex, true); // 数据点可见         }   public void mousePressed(MouseEvent e){      // System.out.println("mouse key is pressed!");   }   public void mouseReleased(MouseEvent e){      // System.out.println("mouse key is released!");      xyItemEntity = null;      isDraged = false;   }   public void mouseEntered(MouseEvent mouseEvent){      // System.out.println( "mouse key is pressed!");   }   public void mouseExited(MouseEvent mouseEvent){      // System.out.println( "mouse key is pressed!");   }   public void mouseClicked(MouseEvent mouseEvent){      // System.out.println( "mouse key is pressed!");   }   public void chartMouseMoved(ChartMouseEvent e){   }   public void mouseDragged(MouseEvent e){      if(xyItemEntity==null) return;      int seriesIndex = xyItemEntity.getSeriesIndex();      int itemIndex = xyItemEntity.getItem();            int xPos = e.getX();      int yPos = e.getY();      Point2D point2D = chartPanel.translateScreenToJava2D(new Point(xPos, yPos));      XYPlot xyPlot = (XYPlot)chart.getPlot();      ChartRenderingInfo chartRenderingInfo = chartPanel.getChartRenderingInfo();      Rectangle2D rectangle2D = chartRenderingInfo.getPlotInfo().getDataArea();      ValueAxis valueAxis = xyPlot.getRangeAxis();      RectangleEdge rectangleEdge = xyPlot.getRangeAxisEdge();            double value = valueAxis.java2DToValue(point2D.getY(), rectangle2D, rectangleEdge);      TimeSeriesCollection tsc = (TimeSeriesCollection)xyItemEntity.getDataset();      TimeSeries ts = tsc.getSeries(seriesIndex);      ts.update(itemIndex,value);      isDraged = true;   }   public void mouseMoved(MouseEvent e){   }   public static void main(String[] paramArrayOfString){      TimeSeriesTest dragValueApp = new TimeSeriesTest("时间序列拖动示例");      dragValueApp.pack();      RefineryUtilities.centerFrameOnScreen(dragValueApp);      dragValueApp.setVisible(true);   }}