org.openstreetmap.josm.data

Class UndoRedoHandler

java.lang.Object

org.openstreetmap.josm.data.UndoRedoHandler

All Implemented Interfaces:

MapView.LayerChangeListener

public class UndoRedoHandler
extends java.lang.Object
implements MapView.LayerChangeListener

Field Summary

Fields

Modifier and Type	Field and Description
java.util.LinkedList<Command>	commands All commands that were made on the dataset.
private java.util.LinkedList<OsmDataLayer.CommandQueueListener>	listenerCommands
java.util.LinkedList<Command>	redoCommands The stack for redoing commands

Constructor Summary

Constructors

Constructor and Description
UndoRedoHandler() Constructs a new UndoRedoHandler.

Method Summary

Modifier and Type	Method and Description
void	activeLayerChange(Layer oldLayer, Layer newLayer) Notifies this listener that the active layer has changed.
void	add(Command c) Executes the command and add it to the intern command queue.
boolean	addCommandQueueListener(OsmDataLayer.CommandQueueListener l) Adds a command queue listener.
void	addNoRedraw(Command c) Executes the command and add it to the intern command queue.
void	afterAdd()
void	clean()
void	clean(Layer layer)
void	fireCommandsChanged()
void	layerAdded(Layer newLayer) Notifies this listener that a layer has been added.
void	layerRemoved(Layer oldLayer) Notifies this listener that a layer has been removed.
void	redo() Redoes the last undoed command.
void	redo(int num) Redoes multiple commands.
void	removeCommandQueueListener(OsmDataLayer.CommandQueueListener l) Removes a command queue listener.
void	undo() Undoes the last added command.
void	undo(int num) Undoes multiple commands.

Methods inherited from class java.lang.Object

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

Field Detail

commands

public final java.util.LinkedList<Command> commands

All commands that were made on the dataset. Don't write from outside!

redoCommands

public final java.util.LinkedList<Command> redoCommands

The stack for redoing commands

listenerCommands

private final java.util.LinkedList<OsmDataLayer.CommandQueueListener> listenerCommands

Constructor Detail

UndoRedoHandler

public UndoRedoHandler()

Constructs a new UndoRedoHandler.

Method Detail

addNoRedraw

public void addNoRedraw(Command c)

Executes the command and add it to the intern command queue.

Parameters:

c - The command to execute. Must not be null.

afterAdd

public void afterAdd()

add

public void add(Command c)

Executes the command and add it to the intern command queue.

Parameters:

c - The command to execute. Must not be null.

undo

public void undo()

Undoes the last added command.

undo

public void undo(int num)

Undoes multiple commands.

Parameters:

num - The number of commands to undo

redo

public void redo()

Redoes the last undoed command.

redo

public void redo(int num)

Redoes multiple commands.

Parameters:

num - The number of commands to redo

fireCommandsChanged

public void fireCommandsChanged()

clean

public void clean()

clean

public void clean(Layer layer)

layerRemoved

public void layerRemoved(Layer oldLayer)

Description copied from interface: MapView.LayerChangeListener

Notifies this listener that a layer has been removed.

Specified by:

layerRemoved in interface MapView.LayerChangeListener

Parameters:

oldLayer - The old removed layer

layerAdded

public void layerAdded(Layer newLayer)

Description copied from interface: MapView.LayerChangeListener

Notifies this listener that a layer has been added.

Specified by:

layerAdded in interface MapView.LayerChangeListener

Parameters:

newLayer - The new added layer

activeLayerChange

public void activeLayerChange(Layer oldLayer,
                              Layer newLayer)

Description copied from interface: MapView.LayerChangeListener

Notifies this listener that the active layer has changed.

Specified by:

activeLayerChange in interface MapView.LayerChangeListener

Parameters:

oldLayer - The previous active layer

newLayer - The new activer layer

removeCommandQueueListener

public void removeCommandQueueListener(OsmDataLayer.CommandQueueListener l)

Removes a command queue listener.

Parameters:

l - The command queue listener to remove

addCommandQueueListener

public boolean addCommandQueueListener(OsmDataLayer.CommandQueueListener l)

Adds a command queue listener.

Parameters:

l - The commands queue listener to add

Returns:

true if the listener has been added, false otherwise