Class CompoundEdit

• java.lang.Object
• • javax.swing.undo.AbstractUndoableEdit
  • • javax.swing.undo.CompoundEdit

All Implemented Interfaces:

Serializable, UndoableEdit

Direct Known Subclasses:

AbstractDocument.DefaultDocumentEvent, UndoManager

public class CompoundEdit
extends AbstractUndoableEdit

A concrete subclass of AbstractUndoableEdit, used to assemble little UndoableEdits into great big ones.

Fields

edits

protected Vector<UndoableEdit> edits

The collection of UndoableEdits undone/redone en masse by this CompoundEdit.

Constructors

CompoundEdit

public CompoundEdit()

Methods

undo

public void undo()
          throws CannotUndoException

Sends undo to all contained UndoableEdits in the reverse of the order in which they were added.

Specified by:

undo in interface UndoableEdit

Overrides:

undo in class AbstractUndoableEdit

Throws:

CannotUndoException - if canUndo returns false

See Also:

AbstractUndoableEdit.canUndo()

redo

public void redo()
          throws CannotRedoException

Sends redo to all contained UndoableEdits in the order in which they were added.

Specified by:

redo in interface UndoableEdit

Overrides:

redo in class AbstractUndoableEdit

Throws:

CannotRedoException - if canRedo returns false

See Also:

AbstractUndoableEdit.canRedo()

lastEdit

protected UndoableEdit lastEdit()

Returns the last UndoableEdit in edits, or null if edits is empty.

die

public void die()

Sends die to each subedit, in the reverse of the order that they were added.

Specified by:

die in interface UndoableEdit

Overrides:

die in class AbstractUndoableEdit

See Also:

die()

addEdit

public boolean addEdit(UndoableEdit anEdit)

Specified by:

addEdit in interface UndoableEdit

Overrides:

addEdit in class AbstractUndoableEdit

Parameters:

anEdit - the edit to be added

Returns:

true if the edit is inProgress; otherwise returns false

See Also:

UndoableEdit.addEdit(javax.swing.undo.UndoableEdit)

end

public void end()

Sets inProgress to false.

See Also:

canUndo(), canRedo()

canUndo

public boolean canUndo()

Returns false if isInProgress or if super returns false.

Specified by:

canUndo in interface UndoableEdit

Overrides:

canUndo in class AbstractUndoableEdit

Returns:

true if this edit is alive and hasBeenDone is true

See Also:

isInProgress()

canRedo

public boolean canRedo()

Returns false if isInProgress or if super returns false.

Specified by:

canRedo in interface UndoableEdit

Overrides:

canRedo in class AbstractUndoableEdit

Returns:

true if this edit is alive and hasBeenDone is false

See Also:

isInProgress()

isInProgress

public boolean isInProgress()

Returns true if this edit is in progress--that is, it has not received end. This generally means that edits are still being added to it.

See Also:

end()

isSignificant

public boolean isSignificant()

Returns true if any of the UndoableEdits in edits do. Returns false if they all return false.

Specified by:

isSignificant in interface UndoableEdit

Overrides:

isSignificant in class AbstractUndoableEdit

Returns:

true

See Also:

UndoableEdit.isSignificant()

getPresentationName

public String getPresentationName()

Returns getPresentationName from the last UndoableEdit added to edits. If edits is empty, calls super.

Specified by:

getPresentationName in interface UndoableEdit

Overrides:

getPresentationName in class AbstractUndoableEdit

Returns:

the empty string ""

See Also:

AbstractUndoableEdit.getUndoPresentationName(), AbstractUndoableEdit.getRedoPresentationName()

getUndoPresentationName

public String getUndoPresentationName()

Returns getUndoPresentationName from the last UndoableEdit added to edits. If edits is empty, calls super.

Specified by:

getUndoPresentationName in interface UndoableEdit

Overrides:

getUndoPresentationName in class AbstractUndoableEdit

Returns:

the value from the defaults table with key AbstractUndoableEdit.undoText, followed by a space, followed by getPresentationName unless getPresentationName is "" in which case, the defaults value is returned alone.

See Also:

AbstractUndoableEdit.getPresentationName()

getRedoPresentationName

public String getRedoPresentationName()

Returns getRedoPresentationName from the last UndoableEdit added to edits. If edits is empty, calls super.

Specified by:

getRedoPresentationName in interface UndoableEdit

Overrides:

getRedoPresentationName in class AbstractUndoableEdit

Returns:

the value from the defaults table with key AbstractUndoableEdit.redoText, followed by a space, followed by getPresentationName unless getPresentationName is "" in which case, the defaults value is returned alone.

See Also:

AbstractUndoableEdit.getPresentationName()

toString

public String toString()

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

Overrides:

toString in class AbstractUndoableEdit

Returns:

a String representation of this object