JCheckBox in JTable

[seema prakash]

Hi,

I have a sample table with 3 columns with the first and the third columns rendered as checkboxes.

I want the check box in the third column to be displayed only if the checkbox in the first column

is checked. Can anyone please guide me how to go about.

The sample code is below:

import java.awt.Color;
import java.awt.Component;
 
import javax.swing.AbstractCellEditor;
import javax.swing.JCheckBox;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import javax.swing.SwingConstants;
import javax.swing.border.Border;
import javax.swing.border.EmptyBorder;
import javax.swing.table.AbstractTableModel;
import javax.swing.table.TableCellEditor;
import javax.swing.table.TableCellRenderer;
 
public class TableTest extends JPanel {
 
    public TableTest() {
        init();
    }
    
    private void init() {
        // test data
        Object[] columns = new Object[] {"Select", "Name", "Rule"};
        Object[][] data = new Object[2][3];
        data[0][0] = new Boolean(false);
        data[0][1] = "John";
        data[0][2] = new Boolean(false);
        data[1][0] = new Boolean(false);
        data[1][1] = "Bill";
        data[1][2] = new Boolean(false);
        
        MyTableModel model = new MyTableModel(data, columns);
        JTable table = new JTable(model);
        
        table.getColumnModel().getColumn(0).setCellEditor(new CheckBoxCellEditor());
        
        table.getColumnModel().getColumn(2).setCellEditor(new CheckBoxCellEditor());
        
        table.getColumnModel().getColumn(0).setCellRenderer(new CWCheckBoxRenderer());
        
        table.getColumnModel().getColumn(2).setCellRenderer(new CWCheckBoxRenderer());
        
        JScrollPane tableScroller = new JScrollPane(table);
        
        add(tableScroller);
    }
    
    private class MyTableModel extends AbstractTableModel {
        
        private Object[][] data;
        private Object[] columns;
        
        public MyTableModel(Object[][] data, Object[] columns) {
            this.data = data;
            this.columns = columns;
        }
        
        public Class getColumnClass(int columnIndex) {
            return data[0][columnIndex].getClass();
        }
        public int getColumnCount() {
            return columns.length;
        }
        public int getRowCount() {
            return data.length;
        }
        public Object getValueAt(int rowIndex, int columnIndex) {
            return data[rowIndex][columnIndex];
        }
        
        // only allow the first and third column to be editable, these are the columns
        // with our checkboxes
        public boolean isCellEditable(int rowIndex, int columnIndex) {
            return (columnIndex == 0 || columnIndex == 2);
        }
    }
    
    private class CheckBoxCellEditor extends AbstractCellEditor implements TableCellEditor {
        protected JCheckBox checkBox;
        
        public CheckBoxCellEditor() {
            checkBox = new JCheckBox();
            checkBox.setHorizontalAlignment(SwingConstants.CENTER);
            checkBox.setBackground( Color.white);
        }
        
        public Component getTableCellEditorComponent(
                JTable table, 
                Object value, 
                boolean isSelected, 
                int row, 
                int column) {
 
            checkBox.setSelected(((Boolean) value).booleanValue());
            
//            Component c = table.getDefaultRenderer(String.class).getTableCellRendererComponent(table, value, isSelected, false, row, column);
//            if (c != null) {
//                checkBox.setBackground(c.getBackground());
//            }
            
            return checkBox;
        }
        public Object getCellEditorValue() {
            return Boolean.valueOf(checkBox.isSelected());
        }
    }
    
    private class CWCheckBoxRenderer extends JCheckBox implements TableCellRenderer {
Border border = new EmptyBorder(1,2,1,2);

public CWCheckBoxRenderer() {
super();
setOpaque(true);
setHorizontalAlignment(SwingConstants.CENTER);
}
 
public Component getTableCellRendererComponent(
JTable table,
Object value,
boolean isSelected,
boolean hasFocus,
int row,
int column) {

if (value instanceof Boolean) {
setSelected(((Boolean)value).booleanValue()); 
setEnabled(table.isCellEditable(row, column));
 
if (isSelected) {
setBackground(table.getSelectionBackground());
setForeground(table.getSelectionForeground());
} else {
setForeground(table.getForeground());
setBackground(table.getBackground());
}
}
else {
//setSelected(false);
//setEnabled(false);
return null;
}

return this; 
}
 
}
 
    public static void main(String[] args) {
        JFrame f = new JFrame();
        f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
 
        TableTest test = new TableTest();
        
        f.getContentPane().add(test);
        f.setSize(350, 350);
        f.show();
    }
}
 

[vijaya raghva naidu rambha]

hey you can do tht in setvalue method in your model class . it will wrk

Originally posted by seema prakash:
Hi,

I have a sample table with 3 columns with the first and the third columns rendered as checkboxes.

I want the check box in the third column to be displayed only if the checkbox in the first column

is checked. Can anyone please guide me how to go about.

The sample code is below:

import java.awt.Color;
import java.awt.Component;
 
import javax.swing.AbstractCellEditor;
import javax.swing.JCheckBox;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import javax.swing.SwingConstants;
import javax.swing.border.Border;
import javax.swing.border.EmptyBorder;
import javax.swing.table.AbstractTableModel;
import javax.swing.table.TableCellEditor;
import javax.swing.table.TableCellRenderer;
 
public class TableTest extends JPanel {
 
    public TableTest() {
        init();
    }
    
    private void init() {
        // test data
        Object[] columns = new Object[] {"Select", "Name", "Rule"};
        Object[][] data = new Object[2][3];
        data[0][0] = new Boolean(false);
        data[0][1] = "John";
        data[0][2] = new Boolean(false);
        data[1][0] = new Boolean(false);
        data[1][1] = "Bill";
        data[1][2] = new Boolean(false);
        
        MyTableModel model = new MyTableModel(data, columns);
        JTable table = new JTable(model);
        
        table.getColumnModel().getColumn(0).setCellEditor(new CheckBoxCellEditor());
        
        table.getColumnModel().getColumn(2).setCellEditor(new CheckBoxCellEditor());
        
        table.getColumnModel().getColumn(0).setCellRenderer(new CWCheckBoxRenderer());
        
        table.getColumnModel().getColumn(2).setCellRenderer(new CWCheckBoxRenderer());
        
        JScrollPane tableScroller = new JScrollPane(table);
        
        add(tableScroller);
    }
    
    private class MyTableModel extends AbstractTableModel {
        
        private Object[][] data;
        private Object[] columns;
        
        public MyTableModel(Object[][] data, Object[] columns) {
            this.data = data;
            this.columns = columns;
        }
        
        public Class getColumnClass(int columnIndex) {
            return data[0][columnIndex].getClass();
        }
        public int getColumnCount() {
            return columns.length;
        }
        public int getRowCount() {
            return data.length;
        }
        public Object getValueAt(int rowIndex, int columnIndex) {
            return data[rowIndex][columnIndex];
        }
        
        // only allow the first and third column to be editable, these are the columns
        // with our checkboxes
        public boolean isCellEditable(int rowIndex, int columnIndex) {
            return (columnIndex == 0 || columnIndex == 2);
        }
    }
    
    private class CheckBoxCellEditor extends AbstractCellEditor implements TableCellEditor {
        protected JCheckBox checkBox;
        
        public CheckBoxCellEditor() {
            checkBox = new JCheckBox();
            checkBox.setHorizontalAlignment(SwingConstants.CENTER);
            checkBox.setBackground( Color.white);
        }
        
        public Component getTableCellEditorComponent(
                JTable table, 
                Object value, 
                boolean isSelected, 
                int row, 
                int column) {
 
            checkBox.setSelected(((Boolean) value).booleanValue());
            
//            Component c = table.getDefaultRenderer(String.class).getTableCellRendererComponent(table, value, isSelected, false, row, column);
//            if (c != null) {
//                checkBox.setBackground(c.getBackground());
//            }
            
            return checkBox;
        }
        public Object getCellEditorValue() {
            return Boolean.valueOf(checkBox.isSelected());
        }
    }
    
    private class CWCheckBoxRenderer extends JCheckBox implements TableCellRenderer {
Border border = new EmptyBorder(1,2,1,2);

public CWCheckBoxRenderer() {
super();
setOpaque(true);
setHorizontalAlignment(SwingConstants.CENTER);
}
 
public Component getTableCellRendererComponent(
JTable table,
Object value,
boolean isSelected,
boolean hasFocus,
int row,
int column) {

if (value instanceof Boolean) {
setSelected(((Boolean)value).booleanValue()); 
setEnabled(table.isCellEditable(row, column));
 
if (isSelected) {
setBackground(table.getSelectionBackground());
setForeground(table.getSelectionForeground());
} else {
setForeground(table.getForeground());
setBackground(table.getBackground());
}
}
else {
//setSelected(false);
//setEnabled(false);
return null;
}

return this; 
}
 
}
 
    public static void main(String[] args) {
        JFrame f = new JFrame();
        f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
 
        TableTest test = new TableTest();
        
        f.getContentPane().add(test);
        f.setSize(350, 350);
        f.show();
    }
}
 

[Darryl Burke]

Cross posted and also answered on the Sun Java forum.
http://forum.java.sun.com/thread.jspa?threadID=5306360