Multiple row selection in JTable
21,106
Solution 1
Using @Hovercraft's example and @camickr's advice, the example below shows a suitable user interface. Although it uses buttons, the SelectionAction would also be suitable for a menu or popup.
import java.awt.*;
import java.awt.event.ActionEvent;
import javax.swing.*;
import javax.swing.DefaultListSelectionModel;
import javax.swing.table.DefaultTableModel;
/** @see http://stackoverflow.com/questions/4526779 */
public class CheckABunch extends JPanel {
private static final int CHECK_COL = 1;
private static final Object[][] DATA = {
{"One", Boolean.TRUE}, {"Two", Boolean.FALSE},
{"Three", Boolean.TRUE}, {"Four", Boolean.FALSE},
{"Five", Boolean.TRUE}, {"Six", Boolean.FALSE},
{"Seven", Boolean.TRUE}, {"Eight", Boolean.FALSE},
{"Nine", Boolean.TRUE}, {"Ten", Boolean.FALSE}};
private static final String[] COLUMNS = {"Number", "CheckBox"};
private DataModel dataModel = new DataModel(DATA, COLUMNS);
private JTable table = new JTable(dataModel);
private DefaultListSelectionModel selectionModel;
public CheckABunch() {
super(new BorderLayout());
this.add(new JScrollPane(table));
this.add(new ControlPanel(), BorderLayout.SOUTH);
table.setPreferredScrollableViewportSize(new Dimension(250, 175));
selectionModel = (DefaultListSelectionModel) table.getSelectionModel();
}
private class DataModel extends DefaultTableModel {
public DataModel(Object[][] data, Object[] columnNames) {
super(data, columnNames);
}
@Override
public Class<?> getColumnClass(int columnIndex) {
if (columnIndex == CHECK_COL) {
return getValueAt(0, CHECK_COL).getClass();
}
return super.getColumnClass(columnIndex);
}
@Override
public boolean isCellEditable(int row, int column) {
return column == CHECK_COL;
}
}
private class ControlPanel extends JPanel {
public ControlPanel() {
this.add(new JLabel("Selection:"));
this.add(new JButton(new SelectionAction("Clear", false)));
this.add(new JButton(new SelectionAction("Check", true)));
}
}
private class SelectionAction extends AbstractAction {
boolean value;
public SelectionAction(String name, boolean value) {
super(name);
this.value = value;
}
@Override
public void actionPerformed(ActionEvent e) {
for (int i = 0; i < dataModel.getRowCount(); i++) {
if (selectionModel.isSelectedIndex(i)) {
dataModel.setValueAt(value, i, CHECK_COL);
}
}
}
}
private static void createAndShowUI() {
JFrame frame = new JFrame("CheckABunch");
frame.add(new CheckABunch());
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.pack();
frame.setLocationRelativeTo(null);
frame.setVisible(true);
}
public static void main(String[] args) {
java.awt.EventQueue.invokeLater(new Runnable() {
@Override
public void run() {
createAndShowUI();
}
});
}
}
Solution 2
The problem is that when you click on a check box to change the value of the check box, the selection of all the rows will be lost. So you may need to use a right mouse click to display a popup menu that contains select/deselect values.
Then you can use table.getSelectedRows(), to get the indexes of all the selected rows you need to update.
Solution 3
You can get the selection interval with code similar to this:
table.getSelectionModel().addListSelectionListener(new ListSelectionListener(){
public void valueChanged(ListSelectionEvent e) {
minSelectedRow = ((DefaultListSelectionModel)e.getSource()).getMinSelectionIndex();
maxSelectedRow = ((DefaultListSelectionModel)e.getSource()).getMaxSelectionIndex();
}
});
Then, when one checkbox is checked (listen to ItemEvent) you should iterate from the minSelectedRow to the maxSelectedRow and change checked boxes state. That's it.
Solution 4
I agree with Roman that his idea would work if you use a class field to hold the min and max selection. For instance:
import javax.swing.*;
import javax.swing.event.ListSelectionEvent;
import javax.swing.event.ListSelectionListener;
import javax.swing.event.TableModelEvent;
import javax.swing.event.TableModelListener;
import javax.swing.table.DefaultTableModel;
public class CheckABunch extends JPanel {
private static final Object[][] DATA = {{"One", Boolean.TRUE}, {"Two", Boolean.FALSE},
{"Three", Boolean.TRUE}, {"Four", Boolean.FALSE}, {"Five", Boolean.TRUE},
{"Six", Boolean.FALSE}, {"Seven", Boolean.TRUE}, {"Eight", Boolean.FALSE}};
private static final String[] COLUMNS = {"Number", "CheckBox"};
private DefaultTableModel model = new DefaultTableModel(DATA, COLUMNS) {
@Override
public Class<?> getColumnClass(int columnIndex) {
if (columnIndex == 1) {
return getValueAt(0, 1).getClass();
}
return super.getColumnClass(columnIndex);
}
};
private JTable table = new JTable(model);
private int minSelectedRow = -1;
private int maxSelectedRow = -1;
boolean tableModelListenerIsChanging = false;
public CheckABunch() {
add(new JScrollPane(table));
table.getSelectionModel().addListSelectionListener(new ListSelectionListener() {
public void valueChanged(ListSelectionEvent e) {
if (e.getValueIsAdjusting()) {
return;
}
minSelectedRow = ((DefaultListSelectionModel) e.getSource()).getMinSelectionIndex();
maxSelectedRow = ((DefaultListSelectionModel) e.getSource()).getMaxSelectionIndex();
}
});
model.addTableModelListener(new TableModelListener() {
public void tableChanged(TableModelEvent e) {
if (tableModelListenerIsChanging) {
return;
}
int firstRow = e.getFirstRow();
int column = e.getColumn();
if (column != 1 || maxSelectedRow == -1 || minSelectedRow == -1) {
return;
}
tableModelListenerIsChanging = true;
boolean value = ((Boolean)model.getValueAt(firstRow, column)).booleanValue();
for (int i = minSelectedRow; i <= maxSelectedRow; i++) {
model.setValueAt(Boolean.valueOf(value), i, column);
}
// *** edit: added two lines
minSelectedRow = -1;
maxSelectedRow = -1;
tableModelListenerIsChanging = false;
}
});
}
private static void createAndShowUI() {
JFrame frame = new JFrame("CheckABunch");
frame.getContentPane().add(new CheckABunch());
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.pack();
frame.setLocationRelativeTo(null);
frame.setVisible(true);
}
public static void main(String[] args) {
java.awt.EventQueue.invokeLater(new Runnable() {
public void run() {
createAndShowUI();
}
});
}
}
Comments
-
sasidhar almost 2 years
I have a JTable, that has one column that is text which is not editable and the second column is a check box that displays boolean values.... Now what i want is, when the user selects multiple rows and unchecks any one of the selected check boxes, then all the check boxes under selection should get unchecked and vice versa.
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sasidhar over 13 yearsyou are right.... when ever the check box is clicked all the row selection is lost..... is there any way around this without using the right click..?
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sasidhar over 13 years@Hovercraft Full Of Eels though your code makes sense, when i executed on my system, its behaving in a quite unexpected way, the bunch selection works just fine, but after that the normal selection is also firing bunch selection......
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sasidhar over 13 years@Hovercraft Full Of Eels check box 2, uncheck box 2 and then check box 4..... then automatically box 2 is being checked......
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Hovercraft Full Of Eels over 13 yearsI'm not surprised as that should occur if 2 is still selected, which was I thought the desired behavior for the program: If you check or uncheck a check box, all selected rows will mimic that check box's state, including a single selected row left over from the last selection. If you don't desire this behavior, one way around it is to set the min and max selected row to -1 at the end of the TableModelListener's tableChanged method. I'll update the code below to show you what I mean.
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trashgod over 13 years+1 Good example. It works as described, but it only handles contiguous selections.
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Hovercraft Full Of Eels over 13 yearsYou are of course right, and thanks for the insights. Let me see what I can do...
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sasidhar over 13 yearsas trashgod mentioned its working only for contiguous selections.... i have tried to store the values of the rows that are being selected, but no success here either..... :(
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trashgod over 13 years@Hovercraft Full Of Eels:
DefaultListSelectionModelhas aclone()that might be helpful. Also, the data model's values areBoolean, so I think the conversion tobooleanandBoolean.valueOf()can be eliminated. -
camickr over 13 yearsYou can't use a mouse click for two different functions. The solution is a proper UI. I gave one suggestion to use a popup menu. Another solution is to use menuItems from a menu with accelerators to select/deselect. This way the user can use the mouse or the keyboard. Or you can add buttons to the UI to do the same.
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trashgod over 13 years@Hovercraft Full Of Eels: The
clone()method proved fruitless, but I used your example to implement @camikr's suggestion. -
trashgod over 13 yearsI have to agree with @camickr; I added an example nearby.
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trashgod over 11 years
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Sam about 10 yearsHi, I'm sorry for replying but I just found this a little while ago and would like some input on adding a listener for changes in the list. Right now I'm using a mouseListener, but it is firing before the list is actually updated. How could I add a listener to get updates for the list as they happen?
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trashgod about 10 yearsMaybe a
TableCellEditor, seen here?
