CompoundEdit (Java 2 Platform SE 5.0) - JDK 5 Documentation v1.5.0, Java 2 SDK 英文文档

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Java^TM 2 Platform
Standard Ed. 5.0

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javax.swing.undo
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
extends AbstractUndoableEdit

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

Field Summary

protected Vector<UndoableEdit> edits
          The collection of UndoableEdits undone/redone en masse by this CompoundEdit.

Fields inherited from class javax.swing.undo.AbstractUndoableEdit

RedoName, UndoName

Constructor Summary

CompoundEdit()


Method Summary

boolean addEdit(UndoableEdit anEdit)
          If this edit is inProgress, accepts anEdit and returns true.

boolean canRedo()
          Returns false if isInProgress or if super returns false.

boolean canUndo()
          Returns false if isInProgress or if super returns false.

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

void end()
          Sets inProgress to false.

String getPresentationName()
          Returns getPresentationName from the last UndoableEdit added to edits.

String getRedoPresentationName()
          Returns getRedoPresentationName from the last UndoableEdit added to edits.

String getUndoPresentationName()
          Returns getUndoPresentationName from the last UndoableEdit added to edits.

boolean isInProgress()
          Returns true if this edit is in progress--that is, it has not received end.

boolean isSignificant()
          Returns true if any of the UndoableEdits in edits do.

protected UndoableEdit lastEdit()
          Returns the last UndoableEdit in edits, or null if edits is empty.

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

String toString()
          Returns a string that displays and identifies this object's properties.

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

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

Field Summary
`protected Vector<UndoableEdit>`	`edits` The collection of `UndoableEdit`s undone/redone en masse by this `CompoundEdit`.

Fields inherited from class javax.swing.undo.AbstractUndoableEdit
`RedoName, UndoName`

Constructor Summary
`CompoundEdit()`

Method Summary
`boolean`	`addEdit(UndoableEdit anEdit)` If this edit is `inProgress`, accepts `anEdit` and returns true.
`boolean`	`canRedo()` Returns false if `isInProgress` or if super returns false.
`boolean`	`canUndo()` Returns false if `isInProgress` or if super returns false.
`void`	`die()` Sends `die` to each subedit, in the reverse of the order that they were added.
`void`	`end()` Sets `inProgress` to false.
`String`	`getPresentationName()` Returns `getPresentationName` from the last `UndoableEdit` added to `edits`.
`String`	`getRedoPresentationName()` Returns `getRedoPresentationName` from the last `UndoableEdit` added to `edits`.
`String`	`getUndoPresentationName()` Returns `getUndoPresentationName` from the last `UndoableEdit` added to `edits`.
`boolean`	`isInProgress()` Returns true if this edit is in progress--that is, it has not received end.
`boolean`	`isSignificant()` Returns true if any of the `UndoableEdit`s in `edits` do.
`protected UndoableEdit`	`lastEdit()` Returns the last `UndoableEdit` in `edits`, or `null` if `edits` is empty.
`void`	`redo()` Sends `redo` to all contained `UndoableEdit`s in the order in which they were added.
`String`	`toString()` Returns a string that displays and identifies this object's properties.
`void`	`undo()` Sends `undo` to all contained `UndoableEdits` in the reverse of the order in which they were added.

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`

Field Detail

edits

protected Vector<UndoableEdit> edits

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

Constructor Detail

CompoundEdit

public CompoundEdit()

Method Detail

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)

If this edit is inProgress, accepts anEdit and returns true.

The last edit added to this CompoundEdit is given a chance to addEdit(anEdit). If it refuses (returns false), anEdit is given a chance to replaceEdit the last edit. If anEdit returns false here, it is added to edits.

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