Sunday, 3 November 2013

How to add button in JTable - Java

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How to works with JTable in java and want to insert button in the JTable column.

Let say you want to add button in JTable column like in this pic :


 First step is to get the column of the button and set the CellRenderer for the column :

 jTable2.getColumn("Edit").setCellRenderer(new ButtonRenderer());
 jTable2.getColumn("Edit").setCellEditor(new ButtonEditor(new JCheckBox()));
            
 jTable2.getColumn("View").setCellRenderer(new ButtonRenderer());
 jTable2.getColumn("View").setCellEditor(new ButtonEditor(new JCheckBox()));


The Class ButtonRenderer

import java.awt.Component;
import javax.swing.JButton;
import javax.swing.JTable;
import javax.swing.UIManager;
import javax.swing.table.TableCellRenderer;

/**
 *
 * @author hp1
 */
public class ButtonRenderer extends JButton implements TableCellRenderer {

    public ButtonRenderer() {
        setOpaque(true);
    }

    @Override
    public Component getTableCellRendererComponent(JTable table, Object value,
            boolean isSelected, boolean hasFocus, int row, int column) {
        if (isSelected) {
            setForeground(table.getSelectionForeground());
            setBackground(table.getSelectionBackground());
        } else {
            setForeground(table.getForeground());
            setBackground(UIManager.getColor("Button.background"));
        }
        setText((value == null) ? "" : value.toString());
        return this;
    }
}



The Button Editor Class

import java.awt.Component;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.DefaultCellEditor;
import javax.swing.JButton;
import javax.swing.JCheckBox;
import javax.swing.JOptionPane;
import javax.swing.JTable;

/**
 *
 * @author hp1
 */
public class ButtonEditor extends DefaultCellEditor {

    protected JButton button;
    private String label;
    private boolean isPushed;

    public ButtonEditor(JCheckBox checkbox) {  
        super(checkbox);
        button = new JButton();
        button.setOpaque(true);
        button.addActionListener(new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent e) {
                fireEditingStopped();
            }
        });
    }

    @Override
    public Component getTableCellEditorComponent(JTable table, Object value,
            boolean isSelected, int row, int column) {
        if (isSelected) {
            button.setForeground(table.getSelectionForeground());
            button.setBackground(table.getSelectionBackground());
        } else {
            button.setForeground(table.getForeground());
            button.setBackground(table.getBackground());
        }
        label = (value == null) ? "" : value.toString();
        button.setText(label);
        isPushed = true;
        return button;
    }

    @Override
    public Object getCellEditorValue() {
        if (isPushed) {
            JOptionPane.showMessageDialog(button, label + ": Ouch!");
        }
        isPushed = false;
        return label;
    }

    @Override
    public boolean stopCellEditing() {
        isPushed = false;
        return super.stopCellEditing();
    }

    @Override
    protected void fireEditingStopped() {
        super.fireEditingStopped();
    }
}


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