pqUndoStack.h

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/*=========================================================================

   Program: ParaView
   Module:    pqUndoStack.h

   Copyright (c) 2005-2008 Sandia Corporation, Kitware Inc.
   All rights reserved.

   ParaView is a free software; you can redistribute it and/or modify it
   under the terms of the ParaView license version 1.2.

   See License_v1.2.txt for the full ParaView license.
   A copy of this license can be obtained by contacting
   Kitware Inc.
   28 Corporate Drive
   Clifton Park, NY 12065
   USA

THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS OR
CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

========================================================================*/
#ifndef pqUndoStack_h
#define pqUndoStack_h

#include "pqCoreModule.h"
#include <QObject>

class pqServer;
class vtkSMUndoElement;
class vtkSMUndoStack;
class vtkSMUndoStackBuilder;
class vtkUndoElement;
class vtkUndoSet;      // vistrails
class vtkPVXMLElement; // vistrails

class PQCORE_EXPORT pqUndoStack : public QObject
{
  Q_OBJECT
public:
  pqUndoStack(vtkSMUndoStackBuilder* builder = 0, QObject* parent = NULL);
  ~pqUndoStack() override;

  bool canUndo();

  bool canRedo();

  const QString undoLabel();

  const QString redoLabel();

  bool ignoreAllChanges() const;

  void registerElementForLoader(vtkSMUndoElement*);

  bool getInUndo() const;
  bool getInRedo() const;

  void Push(const char* label, vtkUndoSet* set);
  vtkUndoSet* getLastUndoSet();                         // vistrails
  vtkUndoSet* getUndoSetFromXML(vtkPVXMLElement* root); // vistrails

  vtkSMUndoStackBuilder* GetUndoStackBuilder();

  void updateAllModifiedProxies();

public Q_SLOTS:
  void beginUndoSet(QString label);
  void endUndoSet();

  void undo();

  void redo();

  void clear();

  void beginNonUndoableChanges();
  void endNonUndoableChanges();

  void addToActiveUndoSet(vtkUndoElement* element);

Q_SIGNALS:
  void stackChanged(bool canUndo, QString undoLabel, bool canRedo, QString redoLabel);

  void canUndoChanged(bool);
  void canRedoChanged(bool);
  void undoLabelChanged(const QString&);
  void redoLabelChanged(const QString&);

  // Fired after undo.
  void undone();
  // Fired after redo.
  void redone();

private Q_SLOTS:
  void onStackChanged();

private:
  class pqImplementation;
  pqImplementation* Implementation;
};

#include "pqApplicationCore.h"

inline void BEGIN_UNDO_SET(const QString& name)
{
  pqUndoStack* usStack = pqApplicationCore::instance()->getUndoStack();
  if (usStack)
  {
    usStack->beginUndoSet(name);
  }
}

inline void END_UNDO_SET()
{
  pqUndoStack* usStack = pqApplicationCore::instance()->getUndoStack();
  if (usStack)
  {
    usStack->endUndoSet();
  }
}

inline void CLEAR_UNDO_STACK()
{
  pqUndoStack* usStack = pqApplicationCore::instance()->getUndoStack();
  if (usStack)
  {
    usStack->clear();
  }
}

inline void ADD_UNDO_ELEM(vtkUndoElement* elem)
{
  pqUndoStack* usStack = pqApplicationCore::instance()->getUndoStack();
  if (usStack)
  {
    usStack->addToActiveUndoSet(elem);
  }
}

inline void BEGIN_UNDO_EXCLUDE()
{
  pqUndoStack* usStack = pqApplicationCore::instance()->getUndoStack();
  if (usStack)
  {
    usStack->beginNonUndoableChanges();
  }
}

inline void END_UNDO_EXCLUDE()
{
  pqUndoStack* usStack = pqApplicationCore::instance()->getUndoStack();
  if (usStack)
  {
    usStack->endNonUndoableChanges();
  }
}

class PQCORE_EXPORT pqScopedUndoExclude
{
public:
  pqScopedUndoExclude() { BEGIN_UNDO_EXCLUDE(); }
  ~pqScopedUndoExclude() { END_UNDO_EXCLUDE(); }
private:
  Q_DISABLE_COPY(pqScopedUndoExclude);
};

class PQCORE_EXPORT pqScopedUndoSet
{
public:
  pqScopedUndoSet(const QString& label) { BEGIN_UNDO_SET(label); }
  ~pqScopedUndoSet() { END_UNDO_SET(); }
private:
  Q_DISABLE_COPY(pqScopedUndoSet);
};

#define SCOPED_UNDO_EXCLUDE() SCOPED_UNDO_EXCLUDE__0(__LINE__)
#define SCOPED_UNDO_EXCLUDE__0(line) pqScopedUndoExclude val##line

#define SCOPED_UNDO_SET(txt) SCOPED_UNDO_SET__0(__LINE__, txt)
#define SCOPED_UNDO_SET__0(line, txt) pqScopedUndoSet val##line(txt)

#endif