super("PopUpColorMenu v1.0");
setSize(100, 200);
setLocation(200, 200);
addWindowListener(new WindowAdapter( ) {
public void windowClosing(WindowEvent e) { System.exit(0); }
});
MouseListener mouseListener = new MouseAdapter( ) {
public void mousePressed(MouseEvent e) { checkPopup(e); }
public void mouseClicked(MouseEvent e) { checkPopup(e); }
public void mouseReleased(MouseEvent e) { checkPopup(e); }
private void checkPopup(MouseEvent e) {
if (e.isPopupTrigger( )) {
selectedComponent = e.getComponent( );
colorMenu.show(e.getComponent(), e.getX(), e.getY( ));
}
}
};
final Container content = getContentPane( );
content.setLayout(new FlowLayout( ));
JButton button = new JButton("Uno");
button.addMouseListener(mouseListener);
content.add(button);
button = new JButton("Due");
button.addMouseListener(mouseListener);
content.add(button);
button = new JButton("Tre");
button.addMouseListener(mouseListener);
content.add(button);
colorMenu = new JPopupMenu("Color");
colorMenu.add(makeMenuItem("Red"));
colorMenu.add(makeMenuItem("Green"));
colorMenu.add(makeMenuItem("Blue"));
getContentPane( ).addMouseListener(mouseListener);
setVisible(true);
