mauda.undoredo
Class UndoRedoUnit

java.lang.Object
  mauda.undoredo.UndoRedoUnit

public class UndoRedoUnit
extends java.lang.Object

Stores several UndoRedoElements as one unit. All this elements will be undoed or redoed in one step.

Author:

Markus Krebs

Constructor Summary

UndoRedoUnit()
Creates an UndoRedoUnit

Method Summary

void	addElement(UndoRedoElement ure) Adds an UndoRedoElement to this UndoRedoUnit.
boolean	equals(java.lang.Object o)
java.util.Vector	getElements() Returns all UndoRedoElements of this UndoRedoUnit
int	getMaxAppendPos() Returns the maximum position of all APPEND-UndoRedoElements.
UndoRedoUnit	invert() Inverts this UndoRedoUnit.
void	perform(java.util.Vector v) Performs this unit on the given object-vector
java.lang.String	toString()

Methods inherited from class java.lang.Object

getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Detail

UndoRedoUnit

public UndoRedoUnit()

Creates an UndoRedoUnit

Method Detail

addElement

public void addElement(UndoRedoElement ure)

Adds an UndoRedoElement to this UndoRedoUnit.

Parameters:

ure - UndoRedoElement to add

getElements

public java.util.Vector getElements()

Returns all UndoRedoElements of this UndoRedoUnit

Returns:

UndoRedoElements.

perform

public void perform(java.util.Vector v)

Performs this unit on the given object-vector

Parameters:

v - object-vector

invert

public UndoRedoUnit invert()

Inverts this UndoRedoUnit. This means that all containing UndoRedoElements are inverted and the order of the UndoRedoElements will be reversed.

Returns:

inverted UndoRedoUnit

getMaxAppendPos

public int getMaxAppendPos()

Returns the maximum position of all APPEND-UndoRedoElements. If this UndoRedoUnit doesnt contain an APPEND-UndoRedoElement, than the minimum position minus 1 of all DELETE-UndoRedoElements will be returned.

Returns:

position

equals

public boolean equals(java.lang.Object o)

Overrides:

equals in class java.lang.Object

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object