javax.swing
Class MenuSelectionManager

java.lang.Object
  javax.swing.MenuSelectionManager

public class MenuSelectionManager

extends Object

A MenuSelectionManager owns the selection in menu hierarchy.

Author:

Arnaud Weber

Field Summary

protected ChangeEvent	changeEvent Only one ChangeEvent is needed per button model instance since the event's only state is the source property.
private static boolean	DEBUG
private static MenuSelectionManager	instance
protected EventListenerList	listenerList
private Vector	selection
private static boolean	TRACE
private static boolean	VERBOSE

Constructor Summary

MenuSelectionManager()

Method Summary

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
private boolean	isComponentPartOfCurrentMenu(MenuElement root, Component c)
private void	printMenuElementArray(MenuElement[] path)
private void	printMenuElementArray(MenuElement[] path, boolean dumpStack)
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) Change the selection in the menu hierarchy.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

instance

private static final MenuSelectionManager instance

selection

private Vector selection

TRACE

private static final boolean TRACE

See Also:

Constant Field Values

VERBOSE

private static final boolean VERBOSE

See Also:

Constant Field Values

DEBUG

private static final boolean DEBUG

See Also:

Constant Field Values

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)

Change the selection in the menu hierarchy.

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

printMenuElementArray

private void printMenuElementArray(MenuElement[] path)

printMenuElementArray

private void printMenuElementArray(MenuElement[] path,
                                   boolean dumpStack)

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

isComponentPartOfCurrentMenu

private boolean isComponentPartOfCurrentMenu(MenuElement root,
                                             Component c)