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/*=========================================================================
Program: ParaView
Module: vtkSMUndoStack.h
Copyright (c) Kitware, Inc.
All rights reserved.
See Copyright.txt or http://www.paraview.org/HTML/Copyright.html for details.
This software is distributed WITHOUT ANY WARRANTY; without even
the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
PURPOSE. See the above copyright notice for more information.
=========================================================================*/
// .NAME vtkSMUndoStack
// .SECTION Description
// This is the undo/redo stack for the Server Manager. This provides a
// unified face for undo/redo irrespective of number of connections, their
// type etc etc.
//
// On every undo/redo, it fetches the XML state change from the server.
// vtkSMUndoRedoStateLoader is used to generate a vtkUndoSet object from
// the XML. GUI can subclass vtkSMUndoRedoStateLoader to handle GUI specific
// XML elements. The loader instance must be set before performing the undo,
// otherwise vtkSMUndoRedoStateLoader is used.
//
// This class also provides API to push any vtkUndoSet instance on to a
// server. GUI can use this to push its own changes that is undoable across
// connections.
//
// .SECTION See Also
// vtkSMUndoStackBuilder
#ifndef vtkSMUndoStack_h
#define vtkSMUndoStack_h
#include "vtkPVServerManagerCoreModule.h" //needed for exports
#include "vtkUndoStack.h"
class vtkSMUndoRedoStateLoader;
class vtkSMUndoStackObserver;
class vtkUndoSet;
class vtkCollection;
class VTKPVSERVERMANAGERCORE_EXPORT vtkSMUndoStack : public vtkUndoStack
{
public:
static vtkSMUndoStack* New();
vtkTypeMacro(vtkSMUndoStack, vtkUndoStack);
void PrintSelf(ostream& os, vtkIndent indent);
// Description:
// Push an undo set on the Undo stack. This will clear
// any sets in the Redo stack.
virtual void Push(const char* label, vtkUndoSet* changeSet);
// Description:
// Performs an Undo using the set on the top of the undo stack. The set is poped from
// the undo stack and pushed at the top of the redo stack.
// Before undo begins, it fires vtkCommand::StartEvent and when undo completes,
// it fires vtkCommand::EndEvent.
// \returns the status of the operation.
virtual int Undo();
// Description:
// Performs a Redo using the set on the top of the redo stack. The set is poped from
// the redo stack and pushed at the top of the undo stack.
// Before redo begins, it fires vtkCommand::StartEvent and when redo completes,
// it fires vtkCommand::EndEvent.
// \returns the status of the operation.
virtual int Redo();
enum EventIds
{
PushUndoSetEvent = 1987,
ObjectCreationEvent = 1988
};
protected:
vtkSMUndoStack();
~vtkSMUndoStack();
// Helper method used to push all vtkSMRemoteObject to the collection of
// all the sessions that have been used across that undoset.
// (It is more than likely that only one session will be find but in case of
// collaboration, we might want to support a set of sessions.)
// This is usefull when we execute the undoset to prevent automatic
// object deletion between 2 undo element calls when a proxy registration
// is supposed to happen.
void FillWithRemoteObjects( vtkUndoSet *undoSet, vtkCollection *collection);
private:
vtkSMUndoStack(const vtkSMUndoStack&); // Not implemented.
void operator=(const vtkSMUndoStack&); // Not implemented.
class vtkInternal;
vtkInternal* Internal;
vtkSMUndoStackObserver* Observer;
};
#endif
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