javapoint.undo
Class UndoableGraphicObjectAfterMove

java.lang.Object
  javax.swing.undo.AbstractUndoableEdit
      javapoint.undo.UndoableGraphicObjectAfterMove

All Implemented Interfaces:

java.io.Serializable, javax.swing.undo.UndoableEdit

public class UndoableGraphicObjectAfterMove
extends javax.swing.undo.AbstractUndoableEdit

This class defines undo/redo command for the grafic object after moving.
The object of this class will be put into undo/redo stack after the graphic object has been moved.

See Also:

Serialized Form

Field Summary

Fields inherited from class javax.swing.undo.AbstractUndoableEdit

RedoName, UndoName

Constructor Summary

UndoableGraphicObjectAfterMove(GraphicObject element, java.awt.Point oldLocation)

Method Summary

boolean	canRedo()
boolean	canUndo()
java.lang.String	getPresentationName()
void	redo() Performs redo operation Opposite to undo operation => set graphic object to new location.
void	undo() Performs undo operation Since it is done just after the graphic object has been moved, undo-operation just returns it to old location.

Methods inherited from class javax.swing.undo.AbstractUndoableEdit

addEdit, die, getRedoPresentationName, getUndoPresentationName, isSignificant, replaceEdit, toString

Methods inherited from class java.lang.Object

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

Constructor Detail

UndoableGraphicObjectAfterMove

public UndoableGraphicObjectAfterMove(GraphicObject element,
                                      java.awt.Point oldLocation)

Parameters:

element - represents graphic object with updated location.

oldLocation - represents old location of graphic object before moving.

Method Detail

undo

public void undo()
          throws javax.swing.undo.CannotUndoException

Performs undo operation
Since it is done just after the graphic object has been moved, undo-operation just returns it to old location.

Specified by:

undo in interface javax.swing.undo.UndoableEdit

Overrides:

undo in class javax.swing.undo.AbstractUndoableEdit

Throws:

javax.swing.undo.CannotUndoException

redo

public void redo()
          throws javax.swing.undo.CannotRedoException

Performs redo operation
Opposite to undo operation => set graphic object to new location.

Specified by:

redo in interface javax.swing.undo.UndoableEdit

Overrides:

redo in class javax.swing.undo.AbstractUndoableEdit

Throws:

javax.swing.undo.CannotRedoException

canUndo

public boolean canUndo()

Specified by:

canUndo in interface javax.swing.undo.UndoableEdit

Overrides:

canUndo in class javax.swing.undo.AbstractUndoableEdit

canRedo

public boolean canRedo()

Specified by:

canRedo in interface javax.swing.undo.UndoableEdit

Overrides:

canRedo in class javax.swing.undo.AbstractUndoableEdit

getPresentationName

public java.lang.String getPresentationName()

Specified by:

getPresentationName in interface javax.swing.undo.UndoableEdit

Overrides:

getPresentationName in class javax.swing.undo.AbstractUndoableEdit