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Préférences
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JavaTM 2 Platform Std. Ed. v1.5.0
javax.swing.undo
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Field Summary |
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Fields inherited from class javax.swing.undo.CompoundEdit |
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edits |
Fields inherited from class javax.swing.undo.AbstractUndoableEdit |
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RedoName, UndoName |
Constructor Summary | |
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UndoManager()
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Method Summary | |
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boolean |
addEdit(UndoableEdit anEdit)
If inProgress, inserts anEdit at indexOfNextAdd, and removes any old edits that were at indexOfNextAdd or later. |
boolean |
canRedo()
Overridden to preserve usual semantics: returns true if a redo operation would be successful now, false otherwise |
boolean |
canUndo()
Overridden to preserve usual semantics: returns true if an undo operation would be successful now, false otherwise |
boolean |
canUndoOrRedo()
Return true if calling undoOrRedo will undo or redo. |
void |
discardAllEdits()
Empty the undo manager, sending each edit a die message in the process. |
protected UndoableEdit |
editToBeRedone()
Returns the the next significant edit to be redone if redo is called. |
protected UndoableEdit |
editToBeUndone()
Returns the the next significant edit to be undone if undo is called. |
void |
end()
Sending end() to an UndoManager turns it into a plain old (ended) CompoundEdit. |
int |
getLimit()
Returns the maximum number of edits this UndoManager will hold. |
String |
getRedoPresentationName()
If inProgress, returns getRedoPresentationName of the significant edit that will be redone when redo() is invoked. |
String |
getUndoOrRedoPresentationName()
Return the appropriate name for a command that toggles between undo and redo. |
String |
getUndoPresentationName()
If inProgress, returns getUndoPresentationName of the significant edit that will be undone when undo() is invoked. |
void |
redo()
If this UndoManager is inProgress ,
redoes the last significant UndoableEdit at
indexOfNextAdd or after, and all insignificant
edits up to it. |
protected void |
redoTo(UndoableEdit edit)
Redoes all changes from indexOfNextAdd to edit. |
void |
setLimit(int l)
Set the maximum number of edits this UndoManager will hold. |
String |
toString()
Returns a string that displays and identifies this object's properties. |
protected void |
trimEdits(int from,
int to)
Tell the edits in the given range (inclusive) to die, and remove them from edits. |
protected void |
trimForLimit()
Reduce the number of queued edits to a range of size limit, centered on indexOfNextAdd. |
void |
undo()
If this UndoManager is inProgress, undo the last significant UndoableEdit before indexOfNextAdd, and all insignificant edits back to it. |
void |
undoableEditHappened(UndoableEditEvent e)
Called by the UndoabledEdit sources this UndoManager listens to. |
void |
undoOrRedo()
Undo or redo as appropriate. |
protected void |
undoTo(UndoableEdit edit)
Undoes all changes from indexOfNextAdd to edit. |
Methods inherited from class javax.swing.undo.CompoundEdit |
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die, getPresentationName, isInProgress, isSignificant, lastEdit |
Methods inherited from class javax.swing.undo.AbstractUndoableEdit |
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replaceEdit |
Methods inherited from class java.lang.Object |
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clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait |
Constructor Detail |
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public UndoManager()
Method Detail |
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public int getLimit()
public void discardAllEdits()
protected void trimForLimit()
protected void trimEdits(int from, int to)
public void setLimit(int l)
protected UndoableEdit editToBeUndone()
protected UndoableEdit editToBeRedone()
protected void undoTo(UndoableEdit edit) throws CannotUndoException
CannotUndoException
protected void redoTo(UndoableEdit edit) throws CannotRedoException
CannotRedoException
public void undoOrRedo() throws CannotRedoException, CannotUndoException
public boolean canUndoOrRedo()
undoOrRedo()
public void undo() throws CannotUndoException
If not inProgress, indexOfNextAdd is ignored and super's routine is called.
undo
in interface UndoableEdit
undo
in class CompoundEdit
CannotUndoException
- if canUndo
returns false
CompoundEdit.end()
public boolean canUndo()
canUndo
in interface UndoableEdit
canUndo
in class CompoundEdit
alive
and hasBeenDone
is true
CompoundEdit.isInProgress()
public void redo() throws CannotRedoException
UndoManager
is inProgress
,
redoes the last significant UndoableEdit
at
indexOfNextAdd
or after, and all insignificant
edits up to it. Updates indexOfNextAdd
accordingly.
If not inProgress
, indexOfNextAdd
is ignored and super's routine is called.
redo
in interface UndoableEdit
redo
in class CompoundEdit
CannotRedoException
- if canRedo
returns false
CompoundEdit.end()
public boolean canRedo()
canRedo
in interface UndoableEdit
canRedo
in class CompoundEdit
true
if this edit is alive
and hasBeenDone
is false
CompoundEdit.isInProgress()
public boolean addEdit(UndoableEdit anEdit)
If not inProgress
, acts as a
CompoundEdit
.
addEdit
in interface UndoableEdit
addEdit
in class CompoundEdit
anEdit
- the edit to be added
inProgress
;
otherwise returns falseCompoundEdit.end()
,
CompoundEdit.addEdit(javax.swing.undo.UndoableEdit)
public void end()
Calls super's end() method (making inProgress false), then sends die() to the unreachable edits at indexOfNextAdd and beyond, in the reverse of the order in which they were added.
end
in class CompoundEdit
CompoundEdit.end()
public String getUndoOrRedoPresentationName()
public String getUndoPresentationName()
If not inProgress, acts as a CompoundEdit
getUndoPresentationName
in interface UndoableEdit
getUndoPresentationName
in class CompoundEdit
AbstractUndoableEdit.undoText
, followed
by a space, followed by getPresentationName
unless getPresentationName
is "" in which
case, the defaults value is returned alone.undo()
,
CompoundEdit.getUndoPresentationName()
public String getRedoPresentationName()
If not inProgress, acts as a CompoundEdit
getRedoPresentationName
in interface UndoableEdit
getRedoPresentationName
in class CompoundEdit
AbstractUndoableEdit.redoText
, followed
by a space, followed by getPresentationName
unless getPresentationName
is "" in which
case, the defaults value is returned alone.redo()
,
CompoundEdit.getUndoPresentationName()
public void undoableEditHappened(UndoableEditEvent e)
undoableEditHappened
in interface UndoableEditListener
public String toString()
toString
in class CompoundEdit