com.goodow.realtime.operation.undo

类 UndoManagerImpl<T>

java.lang.Object

com.goodow.realtime.operation.undo.UndoManagerImpl<T>

类型参数:

T - The type of operations.

所有已实现的接口:

UndoManager<T>, UndoManagerPlus<T>

public final class UndoManagerImpl<T>
extends Object
implements UndoManagerPlus<T>

An undo manager implementation.

嵌套类概要

嵌套类

限定符和类型	类和说明
static interface	UndoManagerImpl.Algorithms<T> Algorithms required by the undo manager.

构造器概要

构造器

构造器和说明
UndoManagerImpl(UndoManagerImpl.Algorithms<T> algorithms)

方法概要

方法

限定符和类型	方法和说明
boolean	canRedo()
boolean	canUndo()
void	checkpoint() Places an undo checkpoint.
void	nonUndoableOp(T op) Places into the undo manager an operation that should not be undone by undos.
List<T>	redo() Effects a redo.
Pair<List<T>,List<T>>	redoPlus() Effects a redo.
List<T>	undo() Effects an undo.
void	undoableOp(T op) Places into the undo manager an operation that should be undone by undos.
Pair<List<T>,List<T>>	undoPlus() Effects an undo.

从类继承的方法 java.lang.Object

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

构造器详细资料

UndoManagerImpl

public UndoManagerImpl(UndoManagerImpl.Algorithms<T> algorithms)

方法详细资料

canRedo

public boolean canRedo()

指定者:

canRedo 在接口中 UndoManager<T>

返回:

True if the model can currently redo.

canUndo

public boolean canUndo()

指定者:

canUndo 在接口中 UndoManager<T>

返回:

True if the model can currently undo.

checkpoint

public void checkpoint()

从接口复制的说明: UndoManager

Places an undo checkpoint.

指定者:

checkpoint 在接口中 UndoManager<T>

nonUndoableOp

public void nonUndoableOp(T op)

从接口复制的说明: UndoManager

Places into the undo manager an operation that should not be undone by undos.

指定者:

nonUndoableOp 在接口中 UndoManager<T>

参数:

op - the operation that should not be undone by any undos

redo

public List<T> redo()

从接口复制的说明: UndoManager

Effects a redo. Returns null if there are no operations to redo.

指定者:

redo 在接口中 UndoManager<T>

返回:

the operation that will effect a redo

redoPlus

public Pair<List<T>,List<T>> redoPlus()

从接口复制的说明: UndoManagerPlus

Effects a redo. Returns null if there are no operations to redo. NOTE: Warning. This interface method may change.

指定者:

redoPlus 在接口中 UndoManagerPlus<T>

返回:

a pair containing the operation that will effect a redo and the relevant transformed non-undoable operation (which may be null if no such operation exists) NOTE: Returning null is probably slightly harder to use than returning an operation that does nothing.

undo

public List<T> undo()

从接口复制的说明: UndoManager

Effects an undo. Returns null if there are no operations to undo.

指定者:

undo 在接口中 UndoManager<T>

返回:

the operation that will effect an undo

undoableOp

public void undoableOp(T op)

从接口复制的说明: UndoManager

Places into the undo manager an operation that should be undone by undos.

指定者:

undoableOp 在接口中 UndoManager<T>

参数:

op - the operation that should be undone by an appropriate undo

undoPlus

public Pair<List<T>,List<T>> undoPlus()

从接口复制的说明: UndoManagerPlus

Effects an undo. Returns null if there are no operations to undo. NOTE: Warning. This interface method may change.

指定者:

undoPlus 在接口中 UndoManagerPlus<T>

返回:

a pair containing the operation that will effect an undo and the relevant transformed non-undoable operation (which may be null if no such operation exists) NOTE: Returning null is probably slightly harder to use than returning an operation that does nothing.