public  void addButton(AbstractButton button) 
{
        button.addMouseListener(this);
        button.setBorderPainted(false);
}

Adds a button to this enabler.

 public static FloatingButtonEnabler getInstance() 
{
        if (singleton == null) {
            singleton = new FloatingButtonEnabler();
        }
        return singleton;
}

Returns a default instance of this enabler.

 public  void mouseEntered(MouseEvent e) 
{
        if (e.getSource() instanceof AbstractButton) {
            final AbstractButton button = (AbstractButton) e.getSource();
            if (button.isEnabled()) {
                button.setBorderPainted(true);
            }
        }
}

Triggers the drawing of the border when the mouse entered the button area.

 public  void mouseExited(MouseEvent e) 
{
        if (e.getSource() instanceof AbstractButton) {
            final AbstractButton button = (AbstractButton) e.getSource();
            button.setBorderPainted(false);
            if (button.getParent() != null)
            {
//                button.getParent().repaint(button.getX(), button.getY(),
//                    button.getWidth(), button.getHeight());
                button.getParent().repaint();
            }
        }
}

Disables the drawing of the border when the mouse leaves the button area.

 public  void removeButton(AbstractButton button) 
{
        button.addMouseListener(this);
        button.setBorderPainted(true);
}

Removes a button from the enabler.