javax.swing.undo
Class AbstractUndoableEdit
- Serializable, UndoableEdit
A default implementation of UndoableEdit that can be
used as a base for implementing editing operations.
boolean | addEdit(UndoableEdit edit)- Incorporates another editing action into this one, thus forming a
combined action.
|
boolean | canRedo()- Determines whether it would be possible to redo this editing
action.
|
boolean | canUndo()- Determines whether it would be possible to undo this editing
action.
|
void | die()- Informs this edit action that it will no longer be used.
|
String | getPresentationName()- Returns a human-readable, localized name that describes this
editing action and can be displayed to the user.
|
String | getRedoPresentationName()- Calculates a localized name for presenting the redo action to the
user.
|
String | getUndoPresentationName()- Calculates a localized name for presenting the undo action to the
user.
|
boolean | isSignificant()- Determines whether this editing action is significant enough for
being seperately undoable by the user.
|
void | redo()- Redoes this editing action.
|
boolean | replaceEdit(UndoableEdit edit)- Incorporates another editing action into this one, thus forming a
combined action that replaces the argument action.
|
String | toString()
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void | undo()- Undoes this editing action.
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clone, equals, extends Object> getClass, finalize, hashCode, notify, notifyAll, toString, wait, wait, wait |
RedoName
protected static final String RedoName
The constant string “Redo”, which was returned by
getRedoPresentationName() on early versions of the
platform. However, this field has become obsolete with version
1.3.1. That method now retrieves a localized string from the
UIManager, using the key
“AbstractUndoableEdit.redoText”.
UndoName
protected static final String UndoName
The constant string “Undo”, which was returned by
getUndoPresentationName() on early versions of the
platform. However, this field has become obsolete with version
1.3.1. That method now retrieves a localized string from the
UIManager, using the key
“AbstractUndoableEdit.undoText”.
AbstractUndoableEdit
public AbstractUndoableEdit()
Constructs a new AbstractUndoableEdit. The initial
state is that the editing action is alive, and
hasBeenDone is true.
addEdit
public boolean addEdit(UndoableEdit edit)
Incorporates another editing action into this one, thus forming a
combined action.
The default implementation always returns
false,
indicating that the editing action could not be incorporated.
- addEdit in interface UndoableEdit
edit - the editing action to be incorporated.
canRedo
public boolean canRedo()
Determines whether it would be possible to redo this editing
action.
- canRedo in interface UndoableEdit
true to indicate that this action can be
redone, false otherwise.
canUndo
public boolean canUndo()
Determines whether it would be possible to undo this editing
action.
- canUndo in interface UndoableEdit
true to indicate that this action can be
undone, false otherwise.
die
public void die()
Informs this edit action that it will no longer be used. Some
actions might use this information to release resources, for
example open files. Called by
UndoManager before this
action is removed from the edit queue.
- die in interface UndoableEdit
isSignificant
public boolean isSignificant()
Determines whether this editing action is significant enough for
being seperately undoable by the user. A typical significant
action would be the resizing of an object. However, changing the
selection in a text document would usually not be considered
significant.
The default implementation returns
true.
- isSignificant in interface UndoableEdit
true to indicate that the action is
significant enough for being separately undoable, or
false otherwise.
replaceEdit
public boolean replaceEdit(UndoableEdit edit)
Incorporates another editing action into this one, thus forming a
combined action that replaces the argument action.
The default implementation always returns
false,
indicating that the argument action should not be replaced.
- replaceEdit in interface UndoableEdit
edit - the editing action to be replaced.
AbstractUndoableEdit.java --
Copyright (C) 2002, 2003, 2004 Free Software Foundation, Inc.
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