Java javax.swing Class MenuSelectionManager（JDK8）

Field Detail

• changeEvent

  protected transient ChangeEvent changeEvent

  Only one ChangeEvent is needed per button model instance since the event's only state is the source property. The source of events generated is always "this".

• listenerList

  protected EventListenerList listenerList

Constructor Detail

• MenuSelectionManager

  public MenuSelectionManager()

Method Detail

• defaultManager

  public static MenuSelectionManager defaultManager()

  Returns the default menu selection manager.

  Returns:

  a MenuSelectionManager object

• setSelectedPath

  public void setSelectedPath(MenuElement[] path)

  Changes the selection in the menu hierarchy. The elements in the array are sorted in order from the root menu element to the currently selected menu element.

  Note that this method is public but is used by the look and feel engine and should not be called by client applications.

  Parameters:

  path - an array of MenuElement objects specifying the selected path

• getSelectedPath

  public MenuElement[] getSelectedPath()

  Returns the path to the currently selected menu item

  Returns:

  an array of MenuElement objects representing the selected path

• clearSelectedPath

  public void clearSelectedPath()

  Tell the menu selection to close and unselect all the menu components. Call this method when a choice has been made

• addChangeListener

  public void addChangeListener(ChangeListener l)

  Adds a ChangeListener to the button.

  Parameters:

  l - the listener to add

• removeChangeListener

  public void removeChangeListener(ChangeListener l)

  Removes a ChangeListener from the button.

  Parameters:

  l - the listener to remove

• getChangeListeners

  public ChangeListener[] getChangeListeners()

  Returns an array of all the ChangeListeners added to this MenuSelectionManager with addChangeListener().

  Returns:

  all of the ChangeListeners added or an empty array if no listeners have been added

  Since:

  1.4

• fireStateChanged

  protected void fireStateChanged()

  Notifies all listeners that have registered interest for notification on this event type. The event instance is created lazily.

  See Also:

  EventListenerList

• processMouseEvent

  public void processMouseEvent(MouseEvent event)

  When a MenuElement receives an event from a MouseListener, it should never process the event directly. Instead all MenuElements should call this method with the event.

  Parameters:

  event - a MouseEvent object

• componentForPoint

  public Component componentForPoint(Component source,
                                     Point sourcePoint)

  Returns the component in the currently selected path which contains sourcePoint.

  Parameters:

  source - The component in whose coordinate space sourcePoint is given

  sourcePoint - The point which is being tested

  Returns:

  The component in the currently selected path which contains sourcePoint (relative to the source component's coordinate space. If sourcePoint is not inside a component on the currently selected path, null is returned.

• processKeyEvent

  public void processKeyEvent(KeyEvent e)

  When a MenuElement receives an event from a KeyListener, it should never process the event directly. Instead all MenuElements should call this method with the event.

  Parameters:

  e - a KeyEvent object

• isComponentPartOfCurrentMenu

  public boolean isComponentPartOfCurrentMenu(Component c)

  Return true if c is part of the currently used menu