Module java.desktop

Class BasicMenuUI.MouseInputHandler

  • All Implemented Interfaces:
    MouseListener, MouseMotionListener, EventListener, MouseInputListener
    Enclosing class:

    protected class BasicMenuUI.MouseInputHandler
    extends Object
    implements MouseInputListener
    Instantiated and used by a menu item to handle the current menu selection from mouse events. A MouseInputHandler processes and forwards all mouse events to a shared instance of the MenuSelectionManager.

    This class is protected so that it can be subclassed by other look and feels to implement their own mouse handling behavior. All overridden methods should call the parent methods so that the menu selection is correct.

    See Also:
    • Constructor Detail

      • MouseInputHandler

        protected MouseInputHandler()
    • Method Detail

      • mousePressed

        public void mousePressed​(MouseEvent e)
        Invoked when the mouse has been clicked on the menu. This method clears or sets the selection path of the MenuSelectionManager.
        Specified by:
        mousePressed in interface MouseListener
        e - the mouse event
      • mouseReleased

        public void mouseReleased​(MouseEvent e)
        Invoked when the mouse has been released on the menu. Delegates the mouse event to the MenuSelectionManager.
        Specified by:
        mouseReleased in interface MouseListener
        e - the mouse event
      • mouseEntered

        public void mouseEntered​(MouseEvent e)
        Invoked when the cursor enters the menu. This method sets the selected path for the MenuSelectionManager and handles the case in which a menu item is used to pop up an additional menu, as in a hierarchical menu system.
        Specified by:
        mouseEntered in interface MouseListener
        e - the mouse event; not used