i am using Jfreechart to write a projet of analysing log file, i have a problem of overvide generateToolTip ,what i want to do is when the user move his mouse to a point of a bar, then the "tip" will be show the information of this block(a subtask), i need to show the discription of each subTask.
i put my exemple here, i just can show the description of the last subtask .
please give me some help if you can. thanks
Jiang
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);
String subTaskDes = null;
// ArrayList<TaskSeries> 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
trashgod
As invoked, the factory sets a IntervalCategoryToolTipGenerator, as shown here. You can customize the generator to see if the other MessageFormat values are helpful, as shown here for StandardCategoryToolTipGenerator, or you can create a new generator.
Addendum: Here's an example of accessing the Gantt chart's TaskSeriesCollection dataset in the generator. For individual subtasks, you can track the index as shown here.
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();
}
});
}
}
Dishan
This is a code I've written to extract the description of sub task as the tool tip. It provides each sub-task displaying different tooltip information.
It could not be the best coding sample but it works. You may modify accordingly and use it.
class MyCategoryToolTipGenerator implements CategoryToolTipGenerator
{
HashMap<String, List<Task>> subTaskMap;
public MyCategoryToolTipGenerator()
{
subTaskMap = new HashMap<String, List<Task>>();
}
@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<Task> 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<Task>( 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();
}
}
来源：https://stackoverflow.com/questions/15226853/how-to-show-information-of-each-task-in-gantt-chart