如何在甘特图中显示每个任务的信息
我正在使用Jfreechart编写一个分析日志文件的项目，我有一个问题是覆盖generateToolTip，我想要做的是当用户将鼠标移动到一个点的时候，然后“提示”将显示信息这个块（一个子任务），我需要显示每个subTask的描述。
我把我的例子放在这里，我只是可以显示最后一个子任务的描述。
如果可以，请给我一些帮助。 谢谢
江
公共课测试{
class MyToolTipGenerator extends IntervalCategoryToolTipGenerator { DateFormat format; private MyToolTipGenerator(String value, DateFormat format) { super(value, format); this.format = format; } @Override public String generateToolTip(CategoryDataset cds, int row, int col) { final String s = super.generateToolTip(cds, row, col); TaskSeriesCollection tsc = (TaskSeriesCollection) cds; StringBuilder sb = new StringBuilder(s); String subTaskDes = null; // ArrayList ats=new ArrayList(); // TaskSeries ts = new TaskSeries(s); int a = tsc.getSeriesCount(); System.out.println(a + "________________"); for (int i = 1; i < tsc.getSeriesCount(); i++) { TaskSeries ts = tsc.getSeries(i); Task task = ts.get(0); int count = task.getSubtaskCount(); for (int j = 0; j < task.getSubtaskCount(); j++) { while (count-- != 0) { subTaskDes = task.getSubtask(j).getDescription() .toString(); } } // for (int j = 0; j < tsc.getSubIntervalCount(row, col); j++) { // tsc.getSeries(0).getTasks().get(0).toString(); // tsc.getSeries(key) // System.out.println(tsc.getSubIntervalCount(row, col)); // tsc.getColumnKey(i).toString(); // } } // System.out.println(ats.get(0).getDescription()); for (int i = 0; i < tsc.getSubIntervalCount(row, col); i++) { sb.append(format.format(tsc.getStartValue(row, col, i))); sb.append("-"); sb.append(format.format(tsc.getEndValue(row, col, i))); sb.append(","); } sb.deleteCharAt(sb.length() - 1); // return sb.toString(); return subTaskDes; } } private JFreeChart createChart() { IntervalCategoryDataset xyDataset = createDataset(); JFreeChart jFreeChart = ChartFactory.createGanttChart("Gantt", "time", "value", xyDataset, true, true, true); CategoryPlot plot = jFreeChart.getCategoryPlot(); plot.getRenderer().setBaseToolTipGenerator( new MyToolTipGenerator("{0}, {1}: ", DateFormat .getTimeInstance(DateFormat.SHORT))); return jFreeChart; } private IntervalCategoryDataset createDataset() { TaskSeriesCollection dataset = new TaskSeriesCollection(); TaskSeries unavailable1 = new TaskSeries("Unavailable 1"); TaskSeries unavailable2 = new TaskSeries("Unavailable 2"); TaskSeries unavailable3 = new TaskSeries("Unavailable 3"); Task t1 = new Task("Meeting Room 1", date(7), date(18)); t1.addSubtask(new Task("Meeting 1", date(9), date(16))); unavailable1.add(t1); Task t2 = new Task("Meeting Room 2", date(8), date(18)); t2.addSubtask(new Task("Meeting 4", date(10), date(11))); t2.addSubtask(new Task("Meeting 5", date(13), date(15))); t2.addSubtask(new Task("Meeting 6", date(16), date(18))); unavailable2.add(t2); Task t3 = new Task("Meeting Room 3", date(8), date(18)); t2.addSubtask(new Task("Meeting 7", date(11), date(11))); t2.addSubtask(new Task("Meeting 8", date(13), date(15))); t2.addSubtask(new Task("Meeting 9", date(18), date(18))); unavailable3.add(t3); dataset.add(unavailable1); dataset.add(unavailable2); dataset.add(unavailable3); return dataset; } private Date date(int hour) { final Calendar calendar = Calendar.getInstance(); calendar.set(2009, Calendar.DECEMBER, 1, hour, 0, 0); return calendar.getTime(); } private void display() { JFrame f = new JFrame("Test"); f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); f.add(new ChartPanel(createChart())); f.pack(); f.setLocationRelativeTo(null); f.setVisible(true); } public static void main(String[] args) { EventQueue.invokeLater(new Runnable() { @Override public void run() { new Test().display(); } }); } enter code here
在调用时，工厂设置IntervalCategoryToolTipGenerator ，如下所示。 您可以自定义生成器以查看其他MessageFormat值是否有用，如此处针对StandardCategoryToolTipGenerator所示，或者您可以创建新生成器。
附录：这是在生成器中访问甘特图的TaskSeriesCollection数据集的TaskSeriesCollection 。 对于单个子任务，您可以跟踪索引，如下所示。
import java.awt.EventQueue; import java.text.DateFormat; import java.util.Calendar; import java.util.Date; import javax.swing.JFrame; import org.jfree.chart.ChartFactory; import org.jfree.chart.ChartPanel; import org.jfree.chart.JFreeChart; import org.jfree.chart.labels.IntervalCategoryToolTipGenerator; import org.jfree.chart.plot.CategoryPlot; import org.jfree.data.category.CategoryDataset; import org.jfree.data.category.IntervalCategoryDataset; import org.jfree.data.gantt.Task; import org.jfree.data.gantt.TaskSeries; import org.jfree.data.gantt.TaskSeriesCollection; /** * @see https://stackoverflow.com/a/15241250/230513 */ public class Test { class MyToolTipGenerator extends IntervalCategoryToolTipGenerator { DateFormat format; private MyToolTipGenerator(String value, DateFormat format) { super(value, format); this.format = format; } @Override public String generateToolTip(CategoryDataset cds, int row, int col) { final String s = super.generateToolTip(cds, row, col); TaskSeriesCollection tsc = (TaskSeriesCollection) cds; StringBuilder sb = new StringBuilder(s); for (int i = 0; i < tsc.getSubIntervalCount(row, col); i++) { sb.append(format.format(tsc.getStartValue(row, col, i))); sb.append("-"); sb.append(format.format(tsc.getEndValue(row, col, i))); sb.append(","); } sb.deleteCharAt(sb.length() - 1); return sb.toString(); } } private JFreeChart createChart() { IntervalCategoryDataset xyDataset = createDataset(); JFreeChart jFreeChart = ChartFactory.createGanttChart("Gantt", "time", "value", xyDataset, true, true, true); CategoryPlot plot = jFreeChart.getCategoryPlot(); plot.getRenderer().setBaseToolTipGenerator( new MyToolTipGenerator( "{0}, {1}: ", DateFormat.getTimeInstance(DateFormat.SHORT))); return jFreeChart; } private IntervalCategoryDataset createDataset() { TaskSeriesCollection dataset = new TaskSeriesCollection(); TaskSeries unavailable = new TaskSeries("Unavailable"); Task t1 = new Task("Meeting Room 1", date(7), date(18)); t1.addSubtask(new Task("Meeting 1", date(9), date(16))); unavailable.add(t1); Task t2 = new Task("Meeting Room 2", date(8), date(18)); t2.addSubtask(new Task("Meeting 4", date(10), date(11))); t2.addSubtask(new Task("Meeting 5", date(13), date(15))); t2.addSubtask(new Task("Meeting 6", date(16), date(18))); unavailable.add(t2); dataset.add(unavailable); return dataset; } private Date date(int hour) { final Calendar calendar = Calendar.getInstance(); calendar.set(2009, Calendar.DECEMBER, 1, hour, 0, 0); return calendar.getTime(); } private void display() { JFrame f = new JFrame("Test"); f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); f.add(new ChartPanel(createChart())); f.pack(); f.setLocationRelativeTo(null); f.setVisible(true); } public static void main(String[] args) { EventQueue.invokeLater(new Runnable() { @Override public void run() { new Test().display(); } }); } }
这是我编写的代码，用于提取子任务的描述作为工具提示。 它提供显示不同工具提示信息的每个子任务。
它可能不是最好的编码样本，但它有效。 您可以相应地修改并使用它。
class MyCategoryToolTipGenerator implements CategoryToolTipGenerator { HashMap> subTaskMap; public MyCategoryToolTipGenerator() { subTaskMap = new HashMap>(); } @Override public String generateToolTip(CategoryDataset categoryDataset, int row, int col ) { TaskSeriesCollection taskSeriesCollection = (TaskSeriesCollection) categoryDataset; if ( row >= taskSeriesCollection.getRowCount() ) { return ""; } TaskSeries taskSeries = taskSeriesCollection.getSeries( row ); if ( col >= taskSeries.getItemCount() ) { return ""; } Task task = taskSeries.get( col ); //Sub Task tooltip handling// if( task.getSubtaskCount() > 0 ) { //Task Key for main task String taskKey = "r=" + row + "c=" + col; //System.out.println( "Sub Task Count = " + task.getSubtaskCount() + " r=" + row + " c=" + col ); List subTaskList = null; if( subTaskMap.containsKey( taskKey ) ) { //If already added, pick the list of available sub tasks subTaskList = subTaskMap.get( taskKey ); } else { //If not found, add all sub tasks to map int subTaskCount = task.getSubtaskCount(); subTaskList = new ArrayList ( subTaskCount ); for( int i = 0; i < subTaskCount; i++ ) { //System.out.println("Adding sub task " + task.getSubtask( i ).getDescription()); subTaskList.add( task.getSubtask( i ) ); } subTaskMap.put( taskKey, subTaskList ); } if( subTaskList != null && subTaskList.size() > 0 ) { //Take the top most sub task and remove it from list Task subTask = subTaskList.remove( 0 ); //System.out.println("Remove sub task " + subTask.getDescription()); //If no other sub tasks available remove key from list if( subTaskList.size() <= 0 ) { //System.out.println("Remove Key " + taskKey); subTaskMap.remove( taskKey ); } //Return the top most subtask description return subTask.getDescription(); } } return task.getDescription(); } }