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Class java.awt.swing.undo.AbstractUndoableEdit 

java.lang.Object
    |
    +----java.awt.swing.undo.AbstractUndoableEdit
public class AbstractUndoableEdit
extends Object
implements UndoableEdit
An abstract implementation of UndoableEdit, implementing simple responses to all boolean methods in that interface.

Variable Index

o RedoName
String returned by getRedoPresentationName()
o UndoName
String returned by getUndoPresentationName()

Constructor Index

o AbstractUndoableEdit()

Method Index

o addEdit(UndoableEdit)
This default implementation returns false.
o canRedo()
Returns true if this edit is alive and hasBeenDone is false.
o canUndo()
Returns true if this edit is alive and hasBeenDone is true.
o die()
Sets alive to false.
o getPresentationName()
This default implementation returns "".
o getRedoPresentationName()
If getPresentationName() returns "", returns AbstractUndoableEdit.RedoName.
o getUndoPresentationName()
If getPresentationName() returns "", returns AbstractUndoableEdit.UndoName.
o isSignificant()
This default implementation returns true.
o redo()
Throws CannotRedoException if canRedo() returns false.
o replaceEdit(UndoableEdit)
This default implementation returns false.
o toString()
Returns a string representation of the object.
o undo()
Throws CannotUndoException if canUndo() returns false.

Variables

o UndoName 
protected static final String UndoName
String returned by getUndoPresentationName()

o RedoName 
protected static final String RedoName
String returned by getRedoPresentationName()

Constructors

o AbstractUndoableEdit 
public AbstractUndoableEdit()

Methods

o die 
public void die()
Sets alive to false. Note that this is a one way operation: dead edits cannot be resurrected. Sending undo() or redo() to a dead edit results in an exception being thrown. Typically an edit is killed when it is consolidated by another edit's addEdit() or replaceEdit() method, or when it is dequeued from an UndoManager

o undo 
public void undo() throws CannotUndoException
Throws CannotUndoException if canUndo() returns false. Sets hasBeenDone to false. Subclasses should override to undo the operation represented by this edit. Override should begin with a call to super.

See Also:
canUndo
o canUndo 
public boolean canUndo()
Returns true if this edit is alive and hasBeenDone is true.

See Also:
die, undo, redo
o redo 
public void redo() throws CannotRedoException
Throws CannotRedoException if canRedo() returns false. Sets hasBeenDone to true. Subclasses should override to redo the operation represented by this edit. Override should begin with a call to super.

See Also:
canRedo
o canRedo 
public boolean canRedo()
Returns true if this edit is alive and hasBeenDone is false.

See Also:
die, undo, redo
o addEdit 
public boolean addEdit(UndoableEdit anEdit)
This default implementation returns false.

See Also:
addEdit
o replaceEdit 
public boolean replaceEdit(UndoableEdit anEdit)
This default implementation returns false.

See Also:
replaceEdit
o isSignificant 
public boolean isSignificant()
This default implementation returns true.

See Also:
isSignificant
o getPresentationName 
public String getPresentationName()
This default implementation returns "". Used by getUndoPresentationName() and getRedoPresentationName() to construct the strings they return. Subclasses shoul override to return an appropriate description of the operation this edit represents.

See Also:
getUndoPresentationName, getRedoPresentationName
o getUndoPresentationName 
public String getUndoPresentationName()
If getPresentationName() returns "", returns AbstractUndoableEdit.UndoName. Otherwise returns AbstractUndoableEdit.UndoName followed by a space and getPresentationName()

See Also:
getPresentationName
o getRedoPresentationName 
public String getRedoPresentationName()
If getPresentationName() returns "", returns AbstractUndoableEdit.RedoName. Otherwise returns AbstractUndoableEdit.RedoName followed by a space and getPresentationName()

See Also:
getPresentationName
o toString 
public String toString()
Returns a string representation of the object.

Overrides:
toString in class Object
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