org.fxmisc.undo

Interface UndoManager.UndoPosition

Enclosing interface:

UndoManager<C>

public static interface UndoManager.UndoPosition

Represents a position in UndoManager's history.

Method Summary

Modifier and Type	Method and Description
boolean	isValid() Checks whether this history position is still valid.
void	mark() Sets the mark of the underlying UndoManager at this position.

Method Detail

mark

void mark()

Sets the mark of the underlying UndoManager at this position. The mark is set whether or not this position is valid. It is OK for an UndoManager to be marked at an invalid position.

isValid

boolean isValid()

Checks whether this history position is still valid. A position becomes invalid when

• the change immediately preceding the position is undone and then discarded due to another incoming change; or
• the change immediately following the position is forgotten due to history size limit.