I have an application that has sheep entries on a JTable. Sheep can be made children of other sheep by selecting an id from the JComboBox editor of the parent id column in the JTable. To do that, the parent id JComboBox must scan the ids of other sheep and eliminate some of them as expected and show them together in its popup.
This is not a time consuming process; but in my opinion in the future if the sheep count rises, then it may cause the GUI become unresponsive. That's why I wanted to use a SwingWorker for the scan process. It would be good if it scanS ids in doInBackground method and return these ids to done method.
So JComboBox would show any possible parent ids. Although doInBackground method works well in done method, when I add a number to JComboBox, I guess it makes popup become invisible.
Because of this whenever I click the cell of parent ıd JComboBox pupup appears and disappears quickly without showing any parent ids. But it must show parent ids. Is there any way to do that?
/*
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package sheepfarm.tools;
import java.awt.Component;
import java.awt.event.ItemEvent;
import java.awt.event.ItemListener;
import java.util.ArrayList;
import java.util.Vector;
import java.util.concurrent.ExecutionException;
import java.util.logging.Level;
import java.util.logging.Logger;
import javax.swing.AbstractCellEditor;
import javax.swing.JComboBox;
import javax.swing.JTable;
import javax.swing.event.PopupMenuEvent;
import javax.swing.event.PopupMenuListener;
import javax.swing.table.TableCellEditor;
import org.joda.time.Interval;
import java.util.Date;
import javax.swing.DefaultComboBoxModel;
import javax.swing.SwingWorker;
/**
*
* @author Personal Computer
*/
public class JParentIDCellEditor extends AbstractCellEditor implements TableCellEditor {
private JComboBox jComboBox = new JComboBox();
private boolean cellEditingStopped = false;
@Override
public Object getCellEditorValue() {
return jComboBox.getSelectedItem();
}
@Override
public Component getTableCellEditorComponent(JTable table, Object value, boolean isSelected, int row, int column) {
ArrayList<Integer> arrayList = new ArrayList<Integer>();
arrayList.add(Integer.parseInt(value.toString()));
jComboBox = new JComboBox();
ParentIDCellWorker worker = new ParentIDCellWorker(table, jComboBox, row, value);
worker.execute();
jComboBox.addItemListener(new ItemListener() {
@Override
public void itemStateChanged(ItemEvent e) {
if (e.getStateChange() == ItemEvent.SELECTED) {
fireEditingStopped();
}
}
});
jComboBox.addPopupMenuListener(new PopupMenuListener() {
@Override
public void popupMenuWillBecomeVisible(PopupMenuEvent e) {
cellEditingStopped = false;
}
@Override
public void popupMenuWillBecomeInvisible(PopupMenuEvent e) {
cellEditingStopped = true;
fireEditingCanceled();
}
@Override
public void popupMenuCanceled(PopupMenuEvent e) {
}
});
return jComboBox;
}
public class ParentIDCellWorker extends SwingWorker<Vector, Vector> {
private JTable table;
private JComboBox jComboBox;
private int row;
private Object value;
public ParentIDCellWorker(JTable table, JComboBox jComboBox, int row, Object value) {
this.table = table;
this.jComboBox = jComboBox;
this.row = row;
this.value = value;
}
@Override
protected Vector doInBackground() throws Exception {
Vector vector = new Vector();
vector.add(0);
for (int i = 0; i < table.getRowCount(); i++) {
try {
Interval interval = new Interval(((Date) table.getValueAt(i, 2)).getTime(), new Date().getTime());
interval = new Interval(((Date) table.getValueAt(i, 2)).getTime(), ((Date) table.getValueAt(row, 2)).getTime());
String gender = table.getValueAt(i, 3).toString();
if (!vector.contains(table.getValueAt(i, 0)) && gender.equals("Sheep")) {
vector.add(table.getValueAt(i, 0));
}
} catch (IllegalArgumentException exp) {
}
}
String[] rowsToRemove = getChildren(Integer.parseInt(table.getValueAt(row, 0).toString()), table).split("-");
for (int i = 0; i < rowsToRemove.length; i++) {
vector.removeElement((Object) (Integer.parseInt(rowsToRemove[i])));
}
return vector;
}
public String getChildren(int id, JTable jTable) {
String id_map = "";
for (int i = 0; i < jTable.getRowCount(); i++) {
if (Integer.parseInt(jTable.getValueAt(i, 1).toString()) == id) {
id_map += getChildren(Integer.parseInt(jTable.getValueAt(i, 0).toString()), jTable);
}
}
return id + "-" + id_map;
}
@Override
protected void done() {
try {
for (Object i : get()) {
jComboBox.addItem(i);
}
jComboBox.setSelectedItem(value);
} catch (InterruptedException ex) {
Logger.getLogger(JParentIDCellEditor.class.getName()).log(Level.SEVERE, null, ex);
} catch (ExecutionException ex) {
Logger.getLogger(JParentIDCellEditor.class.getName()).log(Level.SEVERE, null, ex);
}
}
}
@Override
public boolean stopCellEditing() {
return cellEditingStopped;
}
}
