new sg.UndoManager(options)
Description
create UndoManager object.
Position
UndoManager.js
Parameters
Parameter |
Type |
Description |
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options |
Object |
The option of UndoManager.
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Properties
Properties |
Type |
Description |
canRedo |
Boolean |
indicate whether users can redo or not. |
canUndo |
Boolean |
indicate whether users can undo or not. |
Methods
Methods |
Type |
Description |
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add(operation) |
OperationBase |
add an operation.
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clearRedo() |
clear all redo operation. |
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clearUndo() |
clear all undo operation |
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destroy() |
destroy operation manager |
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get(id) |
Number |
return the specified operation by its id
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peekRedo() |
return the next redo operation. |
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peekUndo() |
return the next undo operation. |
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redo() |
redo an operation. |
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remove(id) |
Number |
remove the specified operation.
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undo() |
undo an operation |
Events
Event |
Description |
add |
Called when add an operation |
change |
Called when add or delete an operation |
redo |
Called when perform redo. |
undo |
Called when perform undo. |
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