Package gov.nasa.jpl.command

Class UndoRedoManager

java.lang.Object

gov.nasa.jpl.command.UndoRedoManager

public class UndoRedoManager
extends Object

Constructor Summary

Constructors

Constructor	Description
UndoRedoManager()

Method Summary

Modifier and Type	Method	Description
static void	addToRedoStack(Command command)	Add a command to the redo stack.
static void	addToUndoStack(Command command)	Add a command to the undo stack.
static void	clearRedoStack()	Clears the redo stack.
static void	redo()	Executes the most recent command stored in the redo stack.
static void	undo()	Executes the most recent command stored in the undo stack.

Methods inherited from class java.lang.Object

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

Constructor Details

UndoRedoManager

public UndoRedoManager()

Method Details

undo

public static void undo()
                 throws CommandException

Executes the most recent command stored in the undo stack. Adds the command to the redo stack.

Throws:

CommandException

redo

public static void redo()
                 throws CommandException

Executes the most recent command stored in the redo stack. Adds the command to the undo stack.

Throws:

CommandException

addToUndoStack

public static void addToUndoStack(Command command)

Add a command to the undo stack.

Parameters:

command -

addToRedoStack

public static void addToRedoStack(Command command)

Add a command to the redo stack.

Parameters:

command -

clearRedoStack

public static void clearRedoStack()

Clears the redo stack. Should be done whenever a command is executed that is not undo/redo.