javapoint.undo
Class UndoableGraphicObjectAfterAdd

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

All Implemented Interfaces:

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

public class UndoableGraphicObjectAfterAdd
extends javax.swing.undo.AbstractUndoableEdit

This class defines undo/redo command for the grafic object after its creation.
The object of this class will be put into undo/redo stack after adding a new graphic object.

See Also:

Serialized Form

Field Summary

Fields inherited from class javax.swing.undo.AbstractUndoableEdit

RedoName, UndoName

Constructor Summary

UndoableGraphicObjectAfterAdd(Slide slide, GraphicObject element, int index)

Method Summary

boolean	canRedo()
boolean	canUndo()
java.lang.String	getPresentationName()
void	redo() Performs redo opeation Opposite to undo operation => adds the removed graphic object.
void	undo() Performs undo opeation Since it is done just after the graphic object was added, undo-operation just removes it.

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

UndoableGraphicObjectAfterAdd

public UndoableGraphicObjectAfterAdd(Slide slide,
                                     GraphicObject element,
                                     int index)

Parameters:

slide - represents the owner slide of the graphic object

element - represents graphic object which was just created

position - represents position of graphic object in the slide

Method Detail

undo

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

Performs undo opeation
Since it is done just after the graphic object was added, undo-operation just removes it.

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 opeation
Opposite to undo operation => adds the removed graphic object.

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