Class UndoableEditSupport
java.lang.Object
javax.swing.undo.UndoableEditSupport
A support class used for managing
UndoableEdit listeners.-
Field Summary
FieldsModifier and TypeFieldDescriptionprotected CompoundEditThe compound edit.protected Vector<UndoableEditListener> The list of listeners.protected ObjectThe real source.protected intThe update level. -
Constructor Summary
ConstructorsConstructorDescriptionConstructs anUndoableEditSupportobject.Constructs anUndoableEditSupportobject. -
Method Summary
Modifier and TypeMethodDescriptionprotected voidCalled only frompostEditandendUpdate.voidRegisters anUndoableEditListener.voidStarts a compound edit update.protected CompoundEditCalled only frombeginUpdate.voidDEADLOCK WARNING: Calling this method may callundoableEditHappenedin all listeners.Returns an array of all theUndoableEditListeners added to this UndoableEditSupport with addUndoableEditListener().intReturns the update level value.voidDEADLOCK WARNING: Calling this method may callundoableEditHappenedin all listeners.voidRemoves anUndoableEditListener.toString()Returns a string that displays and identifies this object's properties.
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Field Details
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updateLevel
protected int updateLevelThe update level. -
compoundEdit
The compound edit. -
listeners
The list of listeners. -
realSource
The real source.
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Constructor Details
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UndoableEditSupport
public UndoableEditSupport()Constructs anUndoableEditSupportobject. -
UndoableEditSupport
Constructs anUndoableEditSupportobject.- Parameters:
r- anObject
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Method Details
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addUndoableEditListener
Registers anUndoableEditListener. The listener is notified whenever an edit occurs which can be undone.- Parameters:
l- anUndoableEditListenerobject- See Also:
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removeUndoableEditListener
Removes anUndoableEditListener.- Parameters:
l- theUndoableEditListenerobject to be removed- See Also:
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getUndoableEditListeners
Returns an array of all theUndoableEditListeners 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
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_postEdit
Called only frompostEditandendUpdate. CallsundoableEditHappenedin all listeners. No synchronization is performed here, since the two calling methods are synchronized.- Parameters:
e- edit to be verified
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postEdit
DEADLOCK WARNING: Calling this method may callundoableEditHappenedin all listeners. It is unwise to call this method from one of its listeners.- Parameters:
e- edit to be posted
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getUpdateLevel
public int getUpdateLevel()Returns the update level value.- Returns:
- an integer representing the update level
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beginUpdate
public void beginUpdate()Starts a compound edit update. -
createCompoundEdit
Called only frombeginUpdate. Exposed here for subclasses' use.- Returns:
- new created
CompoundEditobject
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endUpdate
public void endUpdate()DEADLOCK WARNING: Calling this method may callundoableEditHappenedin all listeners. It is unwise to call this method from one of its listeners. -
toString
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