org.eclipse.nebula.widgets.ganttchart.undoredo

Class GanttUndoRedoManager

java.lang.Object

org.eclipse.nebula.widgets.ganttchart.undoredo.GanttUndoRedoManager

public class GanttUndoRedoManager
extends java.lang.Object

Deals with Undo/Redo events in the chart. Implemented per Command-structure standards.

Field Summary

Fields

Modifier and Type	Field and Description
static int	STACK_SIZE

Constructor Summary

Constructors

Constructor and Description
GanttUndoRedoManager(GanttComposite parent, int maxStackSize)

Method Summary

Modifier and Type	Method and Description
void	addUndoRedoListener(IUndoRedoListener listener) Adds a listener to be notified when undo/redo possibilities change
boolean	canRedo() Whether a Redo is possible.
boolean	canUndo() Whether an Undo is possible.
void	clear() Removes all undo/redo events from the stack
int	getCurrentIndex() The current index of where the undo/redo marker is
java.util.List	getUndoRedoEvents()
void	record(IUndoRedoCommand command) Records an undoable/redoable command
boolean	redo() Redoes the last GanttChart action.
void	removeUndoRedoListener(IUndoRedoListener listener) Removes a listener from being notified when undo/redo possibilities change
void	setCurrentIndex(int currentIndex)
void	setMaxStackSize(int stackSize) Sets a new max undo/redo sack size, value must be a positive integer or it is ignored.
boolean	undo() Undoes the last GanttChart action.

Methods inherited from class java.lang.Object

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

Field Detail

STACK_SIZE

public static final int STACK_SIZE

See Also:

Constant Field Values

Constructor Detail

GanttUndoRedoManager

public GanttUndoRedoManager(GanttComposite parent,
                            int maxStackSize)

Method Detail

getUndoRedoEvents

public java.util.List getUndoRedoEvents()

addUndoRedoListener

public void addUndoRedoListener(IUndoRedoListener listener)

Adds a listener to be notified when undo/redo possibilities change

Parameters:

listener -

removeUndoRedoListener

public void removeUndoRedoListener(IUndoRedoListener listener)

Removes a listener from being notified when undo/redo possibilities change

Parameters:

listener -

record

public void record(IUndoRedoCommand command)

Records an undoable/redoable command

Parameters:

command -

clear

public void clear()

Removes all undo/redo events from the stack

canUndo

public boolean canUndo()

Whether an Undo is possible.

Returns:

true if user can Undo

undo

public boolean undo()

Undoes the last GanttChart action.

Returns:

redo

public boolean redo()

Redoes the last GanttChart action.

Returns:

canRedo

public boolean canRedo()

Whether a Redo is possible.

Returns:

true if user can Redo

getCurrentIndex

public int getCurrentIndex()

The current index of where the undo/redo marker is

Returns:

setCurrentIndex

public void setCurrentIndex(int currentIndex)

Parameters:

currentIndex - The current index of where the undo/redo marker is

setMaxStackSize

public void setMaxStackSize(int stackSize)

Sets a new max undo/redo sack size, value must be a positive integer or it is ignored.

Parameters:

stackSize - new max undo/redo stack size