IUndo |
Represents the interface that provides functionalities for managing undo and redo processes.
Namespace: RAYLASE.Marker.UndoRedo
Assembly: RAYLASE.Marker.UndoRedo (in RAYLASE.Marker.UndoRedo.dll) Version: 2.19.0
SyntaxThe IUndoRedoManagerT type exposes the following members.
Properties| Name | Description | |
|---|---|---|
 | CanRedo | Checks if there are any stored state available on the redo stack. |
| CanUndo | Checks if there are any stored state available on the undo stack. |
| InUndoRedo | Gets a value indicating if the history is in the process of undoing or redoing. |
| MementoSizeThreshold | The size threshold that a memento can be added to the stack. A non-positive value means no size limit. The size is just an arbitrary value. |
| RedoCount | Gets number of redo actions available |
| StackPermissionType | The flag to indicate how a memento is added to the stack. |
| Subject | The subject that this undo redo history is about. |
| SupportRedo | Gets or sets whether the history supports redo. |
| UndoCount | Gets number of undo actions available |
| Validator | The delegate to ask for confirmation when a memento is added. A null validator means that the memento is always approved. |
Methods| Name | Description | |
|---|---|---|
 | Clear | Clear the entire undo and redo stacks. |
| CompoundDo | Pushes mementos into the undo stack, any time the state of Subject changes. |
| Do(IListIMementoT) | Pushes mementos into the undo stack, any time the state of Subject changes. |
| Do(IMementoT) | Pushes an memento into the undo stack, any time the state of Subject changes. |
| PeekRedo | Gets, without removing, the top memento on the redo stack. |
| PeekUndo | Gets, without removing, the top memento on the undo stack. |
| Redo | Restores the subject to the next state on the redo stack, and stores the state before redoing to undo stack. Method CanRedo can be called before calling this method. |
| Undo | Restores the subject to the previous state on the undo stack, and stores the state before undoing to redo stack. Method CanUndo can be called before calling this method. |
Events| Name | Description | |
|---|---|---|
 | StackChanged | Raised whenever there is a change to the undo-redo stack. |
See Also