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A model for undo and redo.
Method Summary | |
boolean |
canRedo()
Returns true if there is something that can be redone. |
boolean |
canUndo()
Returns true if there is something that can be undone. |
void |
clear()
Clears the state of this model. |
void |
redo()
Redo the last change that was undone. |
void |
undo()
Undo the last change that was made. |
Method Detail |
public boolean canUndo()
public void undo()
public boolean canRedo()
public void redo()
public void clear()
canUndo
and canRedo
return false.
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