com.raelity.jvi.swing
Class DefaultBuffer.UndoGroupManager

java.lang.Object
  javax.swing.undo.AbstractUndoableEdit
      javax.swing.undo.CompoundEdit
          javax.swing.undo.UndoManager
              com.raelity.jvi.swing.DefaultBuffer.UndoGroupManager

All Implemented Interfaces:

Serializable, EventListener, UndoableEditListener, UndoableEdit

Enclosing class:

DefaultBuffer

public static class DefaultBuffer.UndoGroupManager
extends UndoManager

UndoGroupManager is an UndoManager that allows explicit control of how UndoableEdits are coalesced into compound edits, rather than using the rules defined by the edits themselves. Other than the default usage, special handling is initiated by doing beginUndoGroup().

Three use cases are supported.

1. Default behavior is defined by UndoManager.
2. UnddoableEdits issued between beginUndoGroup() and endUndoGroup() are placed into a single CompoundEdit. Thus undo() and redo() treat them atomically.
3. Use commitUndoGroup() to place any accumulated UndoableEdits into a CompoundEdit; the application does this at strategic points, such as EndOfLine entry or cursor movement.

Note that certain methods, such as undo(), automatically issue commitUndoGroup().

See Also:

Serialized Form

Field Summary

Fields inherited from class javax.swing.undo.CompoundEdit

edits

Fields inherited from class javax.swing.undo.AbstractUndoableEdit

RedoName, UndoName

Constructor Summary

DefaultBuffer.UndoGroupManager()

Method Summary

boolean	addEdit(UndoableEdit anEdit)
void	beginUndoGroup()
boolean	canRedo()
boolean	canUndo()
boolean	canUndoOrRedo()
void	commitUndoGroup()
void	die()
void	discardAllEdits()
protected UndoableEdit	editToBeRedone()
protected UndoableEdit	editToBeUndone()
void	end()
void	endUndoGroup()
String	getPresentationName()
String	getRedoPresentationName()
String	getUndoOrRedoPresentationName()
String	getUndoPresentationName()
boolean	isSignificant()
void	redo()
protected void	redoTo(UndoableEdit edit)
void	undo()
void	undoOrRedo()
protected void	undoTo(UndoableEdit edit)

Methods inherited from class javax.swing.undo.UndoManager

getLimit, setLimit, toString, trimEdits, trimForLimit, undoableEditHappened

Methods inherited from class javax.swing.undo.CompoundEdit

isInProgress, lastEdit

Methods inherited from class javax.swing.undo.AbstractUndoableEdit

replaceEdit

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Detail

DefaultBuffer.UndoGroupManager

public DefaultBuffer.UndoGroupManager()

Method Detail

beginUndoGroup

public void beginUndoGroup()

endUndoGroup

public void endUndoGroup()

commitUndoGroup

public void commitUndoGroup()

addEdit

public boolean addEdit(UndoableEdit anEdit)

Specified by:

addEdit in interface UndoableEdit

Overrides:

addEdit in class UndoManager

discardAllEdits

public void discardAllEdits()

Overrides:

discardAllEdits in class UndoManager

editToBeUndone

protected UndoableEdit editToBeUndone()

Overrides:

editToBeUndone in class UndoManager

editToBeRedone

protected UndoableEdit editToBeRedone()

Overrides:

editToBeRedone in class UndoManager

undoTo

protected void undoTo(UndoableEdit edit)

Overrides:

undoTo in class UndoManager

redoTo

protected void redoTo(UndoableEdit edit)

Overrides:

redoTo in class UndoManager

undoOrRedo

public void undoOrRedo()

Overrides:

undoOrRedo in class UndoManager

canUndoOrRedo

public boolean canUndoOrRedo()

Overrides:

canUndoOrRedo in class UndoManager

undo

public void undo()

Specified by:

undo in interface UndoableEdit

Overrides:

undo in class UndoManager

canUndo

public boolean canUndo()

Specified by:

canUndo in interface UndoableEdit

Overrides:

canUndo in class UndoManager

redo

public void redo()

Specified by:

redo in interface UndoableEdit

Overrides:

redo in class UndoManager

canRedo

public boolean canRedo()

Specified by:

canRedo in interface UndoableEdit

Overrides:

canRedo in class UndoManager

end

public void end()

Overrides:

end in class UndoManager

getUndoOrRedoPresentationName

public String getUndoOrRedoPresentationName()

Overrides:

getUndoOrRedoPresentationName in class UndoManager

getUndoPresentationName

public String getUndoPresentationName()

Specified by:

getUndoPresentationName in interface UndoableEdit

Overrides:

getUndoPresentationName in class UndoManager

getRedoPresentationName

public String getRedoPresentationName()

Specified by:

getRedoPresentationName in interface UndoableEdit

Overrides:

getRedoPresentationName in class UndoManager

isSignificant

public boolean isSignificant()

Specified by:

isSignificant in interface UndoableEdit

Overrides:

isSignificant in class CompoundEdit

die

public void die()

Specified by:

die in interface UndoableEdit

Overrides:

die in class CompoundEdit

getPresentationName

public String getPresentationName()

Specified by:

getPresentationName in interface UndoableEdit

Overrides:

getPresentationName in class CompoundEdit