com.bbn.openmap.event
Class UndoStackSupport

java.lang.Object
  com.bbn.openmap.event.UndoStackSupport

All Implemented Interfaces:

java.io.Serializable

public class UndoStackSupport
extends java.lang.Object
implements java.io.Serializable

This is a utility class that can be used by beans that need support for notifying gui components that undo/redo actions are available. Use an instance of this class as a member field of your bean and delegate work to it. Used by the UndoStack.

See Also:

Serialized Form

Field Summary

static java.util.logging.Logger

logger

Constructor Summary

UndoStackSupport()
Construct a ProjectionStackSupport.

Method Summary

void	add(UndoStackTrigger pt) Add a ProjectionStackTrigger.
void	fireStackStatus(UndoEvent undoEvent, UndoEvent redoEvent) Send a status to all registered triggers.
java.util.ArrayList<UndoStackTrigger>	getTriggers() Return a cloned list of Triggers.
void	remove(UndoStackTrigger pt) Remove a ProjectionStackTrigger.
int	size()

Methods inherited from class java.lang.Object

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

Field Detail

logger

public static java.util.logging.Logger logger

Constructor Detail

UndoStackSupport

public UndoStackSupport()

Construct a ProjectionStackSupport.

Method Detail

add

public void add(UndoStackTrigger pt)

Add a ProjectionStackTrigger.

Parameters:

pt - ProjectionStackTrigger

remove

public void remove(UndoStackTrigger pt)

Remove a ProjectionStackTrigger.

Parameters:

pt - ProjectionStackTrigger

getTriggers

public java.util.ArrayList<UndoStackTrigger> getTriggers()

Return a cloned list of Triggers.

Returns:

Vector of triggers, null if none have been added.

size

public int size()

fireStackStatus

public void fireStackStatus(UndoEvent undoEvent,
                            UndoEvent redoEvent)

Send a status to all registered triggers.

Parameters:

undoEvent - the next event for undo, so the GUI can be updated with what will happen on undo.

redoEvent - the next event for redo, so the GUI can be updated with what will happen on redo.