UndoManager (undofx 2.1.0 API)

All Known Implementing Classes:

MultiChangeUndoManagerImpl, UndoManagerImpl
```
public interface UndoManager<C>
```

Property Summary

All Methods Instance Methods Abstract Methods
Type	Property and Description
`javafx.beans.value.ObservableBooleanValue`	`atMarkedPosition` Indicates whether this UndoManager's current position within its history is the same as the last marked position.
`Val<C>`	`nextRedo` Gives a peek at the change that will be redone by `redo()`.
`Val<C>`	`nextUndo` Gives a peek at the change that will be undone by `undo()`.
`javafx.beans.value.ObservableBooleanValue`	`performingAction` Indicates whether this undo manager is currently performing undo or redo action.
`Val<java.lang.Boolean>`	`redoAvailable` Indicates whether there is a change that can be redone.
`Val<java.lang.Boolean>`	`undoAvailable` Indicates whether there is a change that can be undone.

Nested Class Summary

Nested Classes
Modifier and Type Interface and Description

static interface UndoManager.UndoPosition
Represents a position in UndoManager's history.

Nested Classes
Modifier and Type	Interface and Description
`static interface`	`UndoManager.UndoPosition` Represents a position in UndoManager's history.

Method Summary

All Methods Instance Methods Abstract Methods Default Methods
Modifier and Type	Method and Description
`javafx.beans.value.ObservableBooleanValue`	`atMarkedPositionProperty()` Indicates whether this UndoManager's current position within its history is the same as the last marked position.
`void`	`close()` Stops observing change events.
`void`	`forgetHistory()` Forgets all changes prior to the current position in the history.
`UndoManager.UndoPosition`	`getCurrentPosition()` Returns the current position within this UndoManager's history.
`default C`	`getNextRedo()` Gets the value of the property nextRedo.
`default C`	`getNextUndo()` Gets the value of the property nextUndo.
`boolean`	`isAtMarkedPosition()`
`boolean`	`isPerformingAction()`
`boolean`	`isRedoAvailable()`
`boolean`	`isUndoAvailable()`
`default void`	`mark()` Sets this UndoManager's mark to the current position.
`Val<C>`	`nextRedoProperty()` Gives a peek at the change that will be redone by `redo()`.
`Val<C>`	`nextUndoProperty()` Gives a peek at the change that will be undone by `undo()`.
`javafx.beans.value.ObservableBooleanValue`	`performingActionProperty()` Indicates whether this undo manager is currently performing undo or redo action.
`void`	`preventMerge()` Prevents the next change from being merged with the latest one.
`boolean`	`redo()` Redo previously undone change, if there is any change to redo.
`Val<java.lang.Boolean>`	`redoAvailableProperty()` Indicates whether there is a change that can be redone.
`boolean`	`undo()` Undo the most recent change, if there is any change to undo.
`Val<java.lang.Boolean>`	`undoAvailableProperty()` Indicates whether there is a change that can be undone.

- Property Detail
  - undoAvailable
```
Val<java.lang.Boolean> undoAvailableProperty
```
    Indicates whether there is a change that can be undone.
  - nextUndo
```
Val<C> nextUndoProperty
```
    Gives a peek at the change that will be undone by undo().
    
    See Also:
    
    getNextUndo()
  - nextRedo
```
Val<C> nextRedoProperty
```
    Gives a peek at the change that will be redone by redo().
    
    See Also:
    
    getNextRedo()
  - redoAvailable
```
Val<java.lang.Boolean> redoAvailableProperty
```
    Indicates whether there is a change that can be redone.
  - performingAction
```
javafx.beans.value.ObservableBooleanValue performingActionProperty
```
    Indicates whether this undo manager is currently performing undo or redo action.
  - atMarkedPosition
```
javafx.beans.value.ObservableBooleanValue atMarkedPositionProperty
```
    Indicates whether this UndoManager's current position within its history is the same as the last marked position.
- Method Detail
  - undo
```
boolean undo()
```
    Undo the most recent change, if there is any change to undo.
    
    Returns:
    
    true if a change was undone, false otherwise.
  - redo
```
boolean redo()
```
    Redo previously undone change, if there is any change to redo.
    
    Returns:
    
    true if a change was redone, false otherwise.
  - undoAvailableProperty
```
Val<java.lang.Boolean> undoAvailableProperty()
```
    Indicates whether there is a change that can be undone.
  - isUndoAvailable
```
boolean isUndoAvailable()
```
  - nextUndoProperty
```
Val<C> nextUndoProperty()
```
    Gives a peek at the change that will be undone by undo().
    
    See Also:
    
    getNextUndo()
  - getNextUndo
```
default C getNextUndo()
```
    Gets the value of the property nextUndo.
    
    Property description:
    
    Gives a peek at the change that will be undone by undo().
  - nextRedoProperty
```
Val<C> nextRedoProperty()
```
    Gives a peek at the change that will be redone by redo().
    
    See Also:
    
    getNextRedo()
  - getNextRedo
```
default C getNextRedo()
```
    Gets the value of the property nextRedo.
    
    Property description:
    
    Gives a peek at the change that will be redone by redo().
  - redoAvailableProperty
```
Val<java.lang.Boolean> redoAvailableProperty()
```
    Indicates whether there is a change that can be redone.
  - isRedoAvailable
```
boolean isRedoAvailable()
```
  - performingActionProperty
```
javafx.beans.value.ObservableBooleanValue performingActionProperty()
```
    Indicates whether this undo manager is currently performing undo or redo action.
  - isPerformingAction
```
boolean isPerformingAction()
```
  - preventMerge
```
void preventMerge()
```
    Prevents the next change from being merged with the latest one.
  - forgetHistory
```
void forgetHistory()
```
    Forgets all changes prior to the current position in the history.
  - getCurrentPosition
```
UndoManager.UndoPosition getCurrentPosition()
```
    Returns the current position within this UndoManager's history.
  - mark
```
default void mark()
```
    Sets this UndoManager's mark to the current position. This method is a convenient shortcut for getCurrentPosition().mark().
  - atMarkedPositionProperty
```
javafx.beans.value.ObservableBooleanValue atMarkedPositionProperty()
```
    Indicates whether this UndoManager's current position within its history is the same as the last marked position.
  - isAtMarkedPosition
```
boolean isAtMarkedPosition()
```
  - close
```
void close()
```
    Stops observing change events.

Interface UndoManager<C>

Property Summary

Nested Class Summary

Method Summary

Property Detail

undoAvailable

nextUndo

nextRedo

redoAvailable

performingAction

atMarkedPosition

Method Detail

undo

redo

undoAvailableProperty

isUndoAvailable

nextUndoProperty

getNextUndo

nextRedoProperty

getNextRedo

redoAvailableProperty

isRedoAvailable

performingActionProperty

isPerformingAction

preventMerge

forgetHistory

getCurrentPosition

mark

atMarkedPositionProperty

isAtMarkedPosition

close