MenuSelectionManager (Java Platform SE 8 ) (original) (raw)

• java.lang.Object

• • javax.swing.MenuSelectionManager

• ---

public class MenuSelectionManager
extends Object
A MenuSelectionManager owns the selection in menu hierarchy.

• • Field Summary

  Fields

  Modifier and Type	Field	Description
  protected ChangeEvent	changeEvent	Only one ChangeEvent is needed per button model instance since the event's only state is the source property.
  protected EventListenerList	listenerList

  • Constructor Summary

  Constructors

  Constructor	Description
  MenuSelectionManager()

  • Method Summary

  All Methods Static Methods Instance Methods Concrete Methods

  Modifier and Type	Method	Description
  void	addChangeListener(ChangeListener l)	Adds a ChangeListener to the button.
  void	clearSelectedPath()	Tell the menu selection to close and unselect all the menu components.
  Component	componentForPoint(Component source,Point sourcePoint)	Returns the component in the currently selected path which contains sourcePoint.
  static MenuSelectionManager	defaultManager()	Returns the default menu selection manager.
  protected void	fireStateChanged()	Notifies all listeners that have registered interest for notification on this event type.
  ChangeListener[]	getChangeListeners()	Returns an array of all the ChangeListeners added to this MenuSelectionManager with addChangeListener().
  MenuElement[]	getSelectedPath()	Returns the path to the currently selected menu item
  boolean	isComponentPartOfCurrentMenu(Component c)	Return true if c is part of the currently used menu
  void	processKeyEvent(KeyEvent e)	When a MenuElement receives an event from a KeyListener, it should never process the event directly.
  void	processMouseEvent(MouseEvent event)	When a MenuElement receives an event from a MouseListener, it should never process the event directly.
  void	removeChangeListener(ChangeListener l)	Removes a ChangeListener from the button.
  void	setSelectedPath(MenuElement[] path)	Changes the selection in the menu hierarchy.

     * ### Methods inherited from class java.lang.[Object](../../java/lang/Object.html "class in java.lang")  
     `[clone](../../java/lang/Object.html#clone--), [equals](../../java/lang/Object.html#equals-java.lang.Object-), [finalize](../../java/lang/Object.html#finalize--), [getClass](../../java/lang/Object.html#getClass--), [hashCode](../../java/lang/Object.html#hashCode--), [notify](../../java/lang/Object.html#notify--), [notifyAll](../../java/lang/Object.html#notifyAll--), [toString](../../java/lang/Object.html#toString--), [wait](../../java/lang/Object.html#wait--), [wait](../../java/lang/Object.html#wait-long-), [wait](../../java/lang/Object.html#wait-long-int-)`

• • Field Detail

     * #### changeEvent  
     protected transient [ChangeEvent](../../javax/swing/event/ChangeEvent.html "class in javax.swing.event") 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](../../javax/swing/event/EventListenerList.html "class in javax.swing.event") listenerList  

  • Constructor Detail

    * #### MenuSelectionManager  
    public MenuSelectionManager()  

  • Method Detail

    * #### defaultManager  
    public static [MenuSelectionManager](../../javax/swing/MenuSelectionManager.html "class in javax.swing") defaultManager()  
    Returns the default menu selection manager.  
    Returns:  
    a MenuSelectionManager object  
    * #### setSelectedPath  
    public void setSelectedPath([MenuElement](../../javax/swing/MenuElement.html "interface in javax.swing")[] 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](../../javax/swing/MenuElement.html "interface in javax.swing")[] 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](../../javax/swing/event/ChangeListener.html "interface in javax.swing.event") l)  
    Adds a ChangeListener to the button.  
    Parameters:  
    `l` \- the listener to add  
    * #### removeChangeListener  
    public void removeChangeListener([ChangeListener](../../javax/swing/event/ChangeListener.html "interface in javax.swing.event") l)  
    Removes a ChangeListener from the button.  
    Parameters:  
    `l` \- the listener to remove  
    * #### getChangeListeners  
    public [ChangeListener](../../javax/swing/event/ChangeListener.html "interface in javax.swing.event")[] getChangeListeners()  
    Returns an array of all the `ChangeListener`s added to this MenuSelectionManager with addChangeListener().  
    Returns:  
    all of the `ChangeListener`s 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](../../javax/swing/event/EventListenerList.html "class in javax.swing.event")  
    * #### processMouseEvent  
    public void processMouseEvent([MouseEvent](../../java/awt/event/MouseEvent.html "class in java.awt.event") 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](../../java/awt/Component.html "class in java.awt") componentForPoint([Component](../../java/awt/Component.html "class in java.awt") source,  
                                       [Point](../../java/awt/Point.html "class in java.awt") 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](../../java/awt/event/KeyEvent.html "class in java.awt.event") 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](../../java/awt/Component.html "class in java.awt") c)  
    Return true if c is part of the currently used menu

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