cmu.survey.data.databits
Class DataBitCompoundUndoableEdit<T>

java.lang.Object
  javax.swing.undo.AbstractUndoableEdit
      javax.swing.undo.CompoundEdit
          org.browsecode.helpers.undo.CompoundUndoableEdit2
              cmu.survey.data.databits.DataBitCompoundUndoableEdit<T>

All Implemented Interfaces:

DataBitUndoableEdit<T>, java.io.Serializable, javax.swing.undo.UndoableEdit, UndoableEdit2

public class DataBitCompoundUndoableEdit<T>
extends CompoundUndoableEdit2
implements DataBitUndoableEdit<T>

See Also:

Serialized Form

Nested Class Summary

Nested classes/interfaces inherited from class org.browsecode.helpers.undo.CompoundUndoableEdit2

CompoundUndoableEdit2.ExtendedUndoException

Field Summary

protected DataBit<T>	dataBit
protected T	newValue
protected T	oldValue

Fields inherited from class javax.swing.undo.CompoundEdit

edits

Fields inherited from class javax.swing.undo.AbstractUndoableEdit

RedoName, UndoName

Fields inherited from interface org.browsecode.helpers.undo.UndoableEdit2

debug

Constructor Summary

DataBitCompoundUndoableEdit(DataBit<T> dataBit)

DataBitCompoundUndoableEdit(DataBit<T> dataBit, java.lang.Object changeType)

DataBitCompoundUndoableEdit(DataBit<T> dataBit, java.lang.Object changeType, java.lang.String presentationName)

DataBitCompoundUndoableEdit(DataBit<T> dataBit, java.lang.Object changeType, java.lang.String presentationName, T oldValue, T newValue)

Method Summary

boolean	addEdit(DataBitUndoableEdit<T> anEdit)
boolean	addEditRegardlessofKey(DataBitUndoableEdit<T> anEdit) For internal use only -- when edits should be grouped together regardless of type.
boolean	canMergeWith(UndoableEdit2 undoableEdit) Whether or not this can merge with another thing.
boolean	canRedo()
boolean	canUndo()
DataBit<T>	getKeyObjectDataBit()
void	redo()
void	undo()

Methods inherited from class org.browsecode.helpers.undo.CompoundUndoableEdit2

addEdit, addEditRegardlessofKey, end, getChangeType, getEdits, getKeyObject, getPresentationName, getRedoPresentationName, getUndoPresentationName, hasEdits, isMergeSameObject, isMergeSameObjectAndType, isSignificant, setSignificant

Methods inherited from class javax.swing.undo.CompoundEdit

addEdit, die, isInProgress, lastEdit, toString

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

Methods inherited from interface cmu.survey.data.databits.DataBitUndoableEdit

getChangeType

Methods inherited from interface org.browsecode.helpers.undo.UndoableEdit2

getKeyObject

Methods inherited from interface javax.swing.undo.UndoableEdit

addEdit, die, getPresentationName, getRedoPresentationName, getUndoPresentationName, isSignificant, replaceEdit

Field Detail

dataBit

protected DataBit<T> dataBit

oldValue

protected T oldValue

newValue

protected T newValue

Constructor Detail

DataBitCompoundUndoableEdit

public DataBitCompoundUndoableEdit(DataBit<T> dataBit)

DataBitCompoundUndoableEdit

public DataBitCompoundUndoableEdit(DataBit<T> dataBit,
                                   java.lang.Object changeType)

DataBitCompoundUndoableEdit

public DataBitCompoundUndoableEdit(DataBit<T> dataBit,
                                   java.lang.Object changeType,
                                   java.lang.String presentationName)

DataBitCompoundUndoableEdit

public DataBitCompoundUndoableEdit(DataBit<T> dataBit,
                                   java.lang.Object changeType,
                                   java.lang.String presentationName,
                                   T oldValue,
                                   T newValue)

Method Detail

getKeyObjectDataBit

public DataBit<T> getKeyObjectDataBit()

Specified by:

getKeyObjectDataBit in interface DataBitUndoableEdit<T>

addEditRegardlessofKey

public boolean addEditRegardlessofKey(DataBitUndoableEdit<T> anEdit)

For internal use only -- when edits should be grouped together regardless of type.

Parameters:

anEdit -

Returns:

addEdit

public boolean addEdit(DataBitUndoableEdit<T> anEdit)

canMergeWith

public boolean canMergeWith(UndoableEdit2 undoableEdit)

Description copied from class: CompoundUndoableEdit2

Whether or not this can merge with another thing. For example, you always need both of these to be true (and usually the UndoHandler will check these first) a) the keyObject's need to be identical b) the change types need to be identical c) The merges need to be consecutive or connected in some way. For example, a text editor should say yes to inserts if the inserts of each letter were consecutive, and would say no if there were inserts that were not consecutive. The UndoableEdit2 that is passed in is expected to be a CompoundUndoableEdit2 that was created by UndoHandler. Do not directly test the undoableEdit passed in with instanceof -- it will probably always fail. Instead, test the type, the key item, and if necessary, go through the stack and get the items in it to check what's in it.

Specified by:

canMergeWith in interface UndoableEdit2

Overrides:

canMergeWith in class CompoundUndoableEdit2

undo

public void undo()
          throws javax.swing.undo.CannotUndoException

Specified by:

undo in interface javax.swing.undo.UndoableEdit

Overrides:

undo in class javax.swing.undo.CompoundEdit

Throws:

javax.swing.undo.CannotUndoException

canUndo

public boolean canUndo()

Specified by:

canUndo in interface javax.swing.undo.UndoableEdit

Overrides:

canUndo in class javax.swing.undo.CompoundEdit

redo

public void redo()
          throws javax.swing.undo.CannotRedoException

Specified by:

redo in interface javax.swing.undo.UndoableEdit

Overrides:

redo in class javax.swing.undo.CompoundEdit

Throws:

javax.swing.undo.CannotRedoException

canRedo

public boolean canRedo()

Specified by:

canRedo in interface javax.swing.undo.UndoableEdit

Overrides:

canRedo in class javax.swing.undo.CompoundEdit