Code
class Task extends SwingWorker {
private final int lengthOfTask;
private final int sleepDummy = new Random().nextInt(100) + 1;
public Task(int lengthOfTask) {
super();
this.lengthOfTask = lengthOfTask;
}
@Override protected Integer doInBackground() {
int current = 0;
while (current < lengthOfTask && !isCancelled()) {
current++;
try {
Thread.sleep(sleepDummy);
} catch (InterruptedException ie) {
break;
}
publish(new ProgressValue(lengthOfTask, current));
}
return sleepDummy * lengthOfTask;
}
}
class ProgressValue {
private final Integer progress;
private final Integer lengthOfTask;
public ProgressValue(Integer lengthOfTask, Integer progress) {
this.progress = progress;
this.lengthOfTask = lengthOfTask;
}
public Integer getProgress() {
return progress;
}
public Integer getLengthOfTask() {
return lengthOfTask;
}
}
class ProgressRenderer extends DefaultTableCellRenderer {
private final JProgressBar b = new JProgressBar();
private final JPanel p = new JPanel(new BorderLayout());
public ProgressRenderer() {
super();
setOpaque(true);
b.setStringPainted(true);
p.add(b);
}
@Override public Component getTableCellRendererComponent(
JTable table, Object value, boolean isSelected, boolean hasFocus,
int row, int column) {
String text = "Done";
if (value instanceof ProgressValue) {
ProgressValue pv = (ProgressValue) value;
Integer current = pv.getProgress();
Integer lengthOfTask = pv.getLengthOfTask();
if (current < 0) {
text = "Canceled";
} else if (current < lengthOfTask) {
b.setMaximum(lengthOfTask);
b.setValue(current);
b.setString(String.format("%d/%d", current, lengthOfTask));
return p;
}
}
super.getTableCellRendererComponent(
table, text, isSelected, hasFocus, row, column);
return this;
}
@Override public void updateUI() {
super.updateUI();
if (p != null) {
SwingUtilities.updateComponentTreeUI(p);
}
}
}
References
