Custom Button Problem

[Kapil Keskar]

Hello Guys,
I am doing one custom button, which when pressed, a popup menu will be generated.Here Is the code which i have tried. But still got one error of -show()- method which i am unable to understand.
Can anybody tell me this error, Please?

import javax.swing.*;
import javax.swing.event.*;
import java.awt.*;
import java.awt.event.*;
import javax.swing.plaf.basic.ComboPopup;

public class CustomButton extends JButton
{
public CustomButton(String str)
{
super(str);
init();
}
JButton jb;
public void init()
{
//jp=new JPanel();
new JButton();
this.setBackground(Color.cyan);
this.setForeground(Color.black);
//this.setComponentOrientation(ComponentOrientation.LEFT_TO_RIGHT);
addActionListener(new Action());
/*this.addMouseListener(new MouseAdapter(){
public void mouseClicked(MouseEvent evt)
{
if(evt.isPopupTrigger())
popup.show(evt.getComponent(),evt.getX(),evt.getY());
}});*/
//jp.add(jb);
}
public static void main(String ar[])
{
//CustomButton cb=new CustomButton();
JFrame f = new JFrame();
Container c = f.getContentPane();
c.setLayout(new FlowLayout());
c.add(new JLabel("Button :"));
JButton jb = new CustomButton("Example") ;
c.add(jb);
f.setSize(300,400);
f.setVisible(true);
f.show();
}
class Action implements ActionListener, ComboPopup, MouseListener, MouseMotionListener, KeyListener
{
JPopupMenu popup;
protected JButton button;
public Action()
{
popup=new JPopupMenu();
JMenuItem mi1=new JMenuItem("One");
JMenuItem mi2=new JMenuItem("Two");
popup.add(mi1);
popup.add(mi2);
}
public void actionPerformed(ActionEvent evt)
{
System.out.println("Clicked");
//popup.show(evt.getComponent(),evt.getX(),evt.getY());
popup.show(this,27,27);
}

public void show() {
try {
// if setSelectedItem() was called with a valid date, adjust the calendar
//calendar.setTime( dateFormat.parse( comboBox.getSelectedItem().toString() ) );
} catch (Exception e) {}
//updatePopup();
}
public void hide() {
popup.setVisible(false);
}
protected JList list = new JList();
public JList getList() {
return list;
}
public MouseListener getMouseListener() {
return this;
}
public MouseMotionListener getMouseMotionListener() {
return this;
}
public KeyListener getKeyListener() {
return this;
}
public boolean isVisible() {
return popup.isVisible();
}
public void uninstallingUI() {
//popup.removePopupMenuListener(this);
}
//
// end ComboPopup method implementations
//======================================
public void mousePressed( MouseEvent e ) {}
public void mouseReleased( MouseEvent e ) {}
// something else registered for MousePressed
public void mouseClicked(MouseEvent e) {
/*if ( !SwingUtilities.isLeftMouseButton(e) )
return;*/
/*if ( !comboBox.isEnabled() )
return;
if ( comboBox.isEditable() ) {
//comboBox.getEditor().getEditorComponent().requestFocus();
} else {
//comboBox.requestFocus();
}
//togglePopup();*/
}
protected boolean mouseInside = false;
public void mouseEntered(MouseEvent e) {
mouseInside = true;
}
public void mouseExited(MouseEvent e) {
mouseInside = false;
}
// MouseMotionListener
public void mouseDragged(MouseEvent e) {}
public void mouseMoved(MouseEvent e) {}
// KeyListener
public void keyPressed(KeyEvent e) {}
public void keyTyped(KeyEvent e) {}
public void keyReleased( KeyEvent e ) {
if ( e.getKeyCode() == KeyEvent.VK_SPACE ||
e.getKeyCode() == KeyEvent.VK_ENTER ) {
//togglePopup();
}
}}
}

[Manfred Leonhardt]

Hi Kapil,
Try the following code to see how it can be done.

import javax.swing.*;
import javax.swing.event.*;
import java.awt.*;
import java.awt.event.*;
import javax.swing.plaf.basic.ComboPopup;

public class CustomButton extends JButton
{
  private JPopupMenu popup;
  public CustomButton(String str)
  {
    super( str );
    init();
  }
  public void init()
  {
    //
    // Adjust background and foreground colors.
    //
    this.setBackground( Color.cyan );
    this.setForeground( Color.black );
    //
    // Create popup menu that will appear when button clicked.
    //
    popup = new JPopupMenu();
    JMenuItem mItem = new JMenuItem( "One" );
    mItem.addActionListener(
      new ActionListener()
      {
        public void actionPerformed( ActionEvent ae )
        {
          System.out.println( "Hit: " + ((JMenuItem)ae.getSource()).getText() );
        }
      });
    popup.add( mItem );
    mItem = new JMenuItem( "Two" );
    mItem.addActionListener(
      new ActionListener()
      {
        public void actionPerformed( ActionEvent ae )
        {
          System.out.println( "Hit: " + ((JMenuItem)ae.getSource()).getText() );
        }
      });
    popup.add( mItem );
    //
    // Add action listener for this component
    //
    addActionListener( 
      new ActionListener()
      {
        public void actionPerformed(ActionEvent evt)
        {
          Point loc = ((JComponent)evt.getSource()).getLocation();
          popup.show( (JComponent)evt.getSource(), 2, 2 );
        }
      });
  }
  public static void main(String ar[])
  {
    //CustomButton cb=new CustomButton();
    JFrame f = new JFrame();
    Container c = f.getContentPane();
    c.setLayout( new FlowLayout() );
    c.add( new JLabel("Button :") );
    JButton jb = new CustomButton( "Example" );
    c.add( jb );
    f.setSize( 300, 400 );
    f.setVisible( true );
    f.show();
  }
}

Regards,
Manfred.