Java javax.swing.undo Class UndoableEditSupport（JDK8）

Field Detail

• updateLevel

  protected int updateLevel

• compoundEdit

  protected CompoundEdit compoundEdit

• listeners

  protected Vector<UndoableEditListener> listeners

• realSource

  protected Object realSource

Constructor Detail

• UndoableEditSupport

  public UndoableEditSupport()

  Constructs an UndoableEditSupport object.

• UndoableEditSupport

  public UndoableEditSupport(Object r)

  Constructs an UndoableEditSupport object.

  Parameters:

  r - an Object

Method Detail

• addUndoableEditListener

  public void addUndoableEditListener(UndoableEditListener l)

  Registers an UndoableEditListener. The listener is notified whenever an edit occurs which can be undone.

  Parameters:

  l - an UndoableEditListener object

  See Also:

  removeUndoableEditListener(javax.swing.event.UndoableEditListener)

• removeUndoableEditListener

  public void removeUndoableEditListener(UndoableEditListener l)

  Removes an UndoableEditListener.

  Parameters:

  l - the UndoableEditListener object to be removed

  See Also:

  addUndoableEditListener(javax.swing.event.UndoableEditListener)

• getUndoableEditListeners

  public UndoableEditListener[] getUndoableEditListeners()

  Returns an array of all the UndoableEditListeners added to this UndoableEditSupport with addUndoableEditListener().

  Returns:

  all of the UndoableEditListeners added or an empty array if no listeners have been added

  Since:

  1.4

• _postEdit

  protected void _postEdit(UndoableEdit e)

  Called only from postEdit and endUpdate. Calls undoableEditHappened in all listeners. No synchronization is performed here, since the two calling methods are synchronized.

• postEdit

  public void postEdit(UndoableEdit e)

  DEADLOCK WARNING: Calling this method may call undoableEditHappened in all listeners. It is unwise to call this method from one of its listeners.

• getUpdateLevel

  public int getUpdateLevel()

  Returns the update level value.

  Returns:

  an integer representing the update level

• beginUpdate

  public void beginUpdate()

• createCompoundEdit

  protected CompoundEdit createCompoundEdit()

  Called only from beginUpdate. Exposed here for subclasses' use.

• endUpdate

  public void endUpdate()

  DEADLOCK WARNING: Calling this method may call undoableEditHappened in all listeners. It is unwise to call this method from one of its listeners.

• toString

  public String toString()

  Returns a string that displays and identifies this object's properties.

  Overrides:

  toString in class Object

  Returns:

  a String representation of this object