Need help with adding an action on JButon

[bobby, morkos]

import javax.swing.*;
import java.awt.*;
import java.awt.geom.*;
import java.awt.event.*;
import javax.swing.table.*;
import java.io.*;
public class JButtonInJTable extends JFrame implements ActionListener {
JTable table;
DefaultTableModel dModel;
DefaultTableModel dm;
public JButtonInJTable () {
JButton A = new JButton("A");
A.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
System.out.println(">> Button action >> A");
}
});
JButton B = new JButton("B"); B.addActionListener(this);
JButton C = new JButton("C"); A.addActionListener(this);
JButton D = new JButton("D"); A.addActionListener(this);
JButton E = new JButton("E"); A.addActionListener(this);
Object [][] data = {{ A ,"aaa"},{B, "bbb"},{C,"ccc"},{D,"ddd"},{E,"eee"}};
Object [] value ={"label 1","label 2"};

dModel = new DefaultTableModel(data,value);
table = new JTable(dModel);
table.setPreferredScrollableViewportSize(new Dimension(750, 250));
table.setRowSelectionAllowed(true);
JButtonRenderer jbr = new JButtonRenderer();
table.getColumn("label 1").setCellRenderer(jbr);
JScrollPane scrollPane = new JScrollPane(table);
JPanel centerPanel = new JPanel();
centerPanel.add(scrollPane);
this.getContentPane().add(centerPanel,BorderLayout.CENTER);
this.setVisible(true);
this.setBounds(100,100,200,200);
pack();
}
public static void main(String [] a){
new JButtonInJTable();
}
public void actionPerformed(java.awt.event.ActionEvent event) {
if(event.getActionCommand()=="A") {
System.out.println(">> Button action >> A");
}
if(event.getActionCommand()=="B") {
System.out.println(">> Button action >> B");
}
}
}

class JButtonRenderer implements TableCellRenderer {
public Component getTableCellRendererComponent(JTable table,
Object value,
boolean isSelected,
boolean hasFocus,
int row,
int column) {
//if (value==null) return null;
// System.out.println("row : " + row + "column : " + column);
return (Component)value;
}
}

[Shane Roylance]

I don't know if this is the problem you are asking about, but if the action listener you are implementing doesn't work I think it is because your conditional statement is wrong.
it should be:
if( event.getActionCommand().equals("A") ) the == will not work in this case.

[Renee Zhang]

Hi, bobby:
Please add this class to your source file
class JTableButtonMouseListener implements MouseListener {
private JTable __table;
private void __forwardEventToButton(MouseEvent e) {
TableColumnModel columnModel = __table.getColumnModel();
int column = columnModel.getColumnIndexAtX(e.getX());
int row = e.getY() / __table.getRowHeight();
Object value;
if(row >= __table.getRowCount() || row < 0 ||
column >= __table.getColumnCount() || column < 0)
return;
value = __table.getValueAt(row, column);
if(value instanceof JButton) {
JButton button = (JButton)value;
MouseEvent buttonEvent = (MouseEvent)SwingUtilities.convertMouseEvent(__table, e, button);
button.dispatchEvent(buttonEvent);
System.out.println(button.getActionCommand());
}
else if(value instanceof JComboBox) {
JComboBox combobox = (JComboBox)value;
MouseEvent comboBoxEvent = (MouseEvent)SwingUtilities.convertMouseEvent(__table, e, combobox);
combobox.dispatchEvent(comboBoxEvent);
}
else if(value instanceof JCheckBox) {
JCheckBox checkbox = (JCheckBox)value;
MouseEvent checkboxEvent = (MouseEvent)SwingUtilities.convertMouseEvent(__table, e, checkbox);
checkbox.dispatchEvent(checkboxEvent);
}
else {
System.out.println("Is something else.");
}
// This is necessary so that when a button is pressed and released
// it gets rendered properly. Otherwise, the button may still appear
// pressed down when it has been released.
__table.repaint();
}
public JTableButtonMouseListener(JTable table) {
__table = table;
}
public void mouseClicked(MouseEvent e) {
__forwardEventToButton(e);
}
public void mouseEntered(MouseEvent e) {
// __forwardEventToButton(e);
}
public void mouseExited(MouseEvent e) {
//__forwardEventToButton(e);
}
public void mousePressed(MouseEvent e) {
// __forwardEventToButton(e);
}
public void mouseReleased(MouseEvent e) {
//__forwardEventToButton(e);
}
}

Then add one line to your code
table.addMouseListener(new JTableButtonMouseListener (table));

Good luck!

[bobby, morkos]

Thanks it works fine now. But, I want to retrieve "aaa" when a click button 1 and retrieve "bbb" when a click button 2. What I'm trying to do is when a click a button the cell value associated with the button is retrieved. I hope you can help.

[Renee Zhang]

That is simply! Delete JTableButtonMouseListener and addMouseListener to your table
table.addMouseListener(new MouseAdapter() {
public void mousePressed(MouseEvent me) {
JTable table =(JTable) me.getSource();
Point p = me.getPoint();
int row = table.rowAtPoint(p);
int col = table.columnAtPoint(p);
if (col == 0) {
System.out.println("The data you want is " + table.getValueAt(row, 1));
}
}
});
Good luck!