org.eclipse.nebula.visualization.internal.xygraph.undo

Class OperationsManager

java.lang.Object

org.eclipse.nebula.visualization.internal.xygraph.undo.OperationsManager

public class OperationsManager
extends java.lang.Object

The operation manager will help to manage the undoable and redoable operations.

Constructor Summary

Constructors

Constructor and Description
OperationsManager() Constructor.

Method Summary

Modifier and Type	Method and Description
void	addCommand(IUndoableCommand command) Execute a command and push it to undo stack.
void	addListener(IOperationsManagerListener listener)
java.lang.Object[]	getRedoCommands()
int	getRedoCommandsSize()
java.lang.Object[]	getUndoCommands()
int	getUndoCommandsSize()
void	redo() redo the last undone command.
void	redoCommand(IUndoableCommand command) Re-do the command.
boolean	removeListener(IOperationsManagerListener listener)
void	undo() undo the last command.
void	undoCommand(IUndoableCommand command) Undo the command.

Methods inherited from class java.lang.Object

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

Constructor Detail

OperationsManager

public OperationsManager()

Constructor.

Method Detail

addCommand

public void addCommand(IUndoableCommand command)

Execute a command and push it to undo stack.

Parameters:

command - the command to be executed.

undoCommand

public void undoCommand(IUndoableCommand command)

Undo the command. Restore the state of the target to the previous state before this command has been executed.

Parameters:

command -

redoCommand

public void redoCommand(IUndoableCommand command)

Re-do the command. Restore the state of the target to the state after this command has been executed.

Parameters:

command -

undo

public void undo()

undo the last command. Do nothing if there is no last command.

redo

public void redo()

redo the last undone command. Do nothing if there is no last undone command.

getUndoCommands

public java.lang.Object[] getUndoCommands()

Returns:

the undo commands array. The first element is the oldest commands and the last element is the latest commands.

getRedoCommands

public java.lang.Object[] getRedoCommands()

Returns:

the redo commands array. The first element is the oldest commands and the last element is the latest commands.

addListener

public void addListener(IOperationsManagerListener listener)

removeListener

public boolean removeListener(IOperationsManagerListener listener)

getUndoCommandsSize

public int getUndoCommandsSize()

getRedoCommandsSize

public int getRedoCommandsSize()