qgsmodelundocommand.h

Go to the documentation of this file.

/***************************************************************************
                             qgsmodelundocommand.h
                             ----------------------------------
    Date                 : March 2020
    Copyright            : (C) 2020 Nyall Dawson
    Email                : nyall dot dawson at gmail dot com
 ***************************************************************************
 *                                                                         *
 *   This program is free software; you can redistribute it and/or modify  *
 *   it under the terms of the GNU General Public License as published by  *
 *   the Free Software Foundation; either version 2 of the License, or     *
 *   (at your option) any later version.                                   *
 *                                                                         *
 ***************************************************************************/
 
#ifndef QGSMODELUNDOCOMMAND_H
#define QGSMODELUNDOCOMMAND_H
 
#include "qgis.h"
#include "qgis_gui.h"
 
#include <QUndoCommand>
 
class QgsProcessingModelAlgorithm;
 
#define SIP_NO_FILE


class GUI_EXPORT QgsModelUndoCommand : public QUndoCommand
{
  public:
    enum class CommandOperation
    {
      Unknown = 0,      
      NameChanged = 1,  
      GroupChanged = 2, 
    };

    QgsModelUndoCommand( QgsProcessingModelAlgorithm *model, const QString &text, CommandOperation operation = CommandOperation::Unknown, QUndoCommand *parent SIP_TRANSFERTHIS = nullptr );

    QgsModelUndoCommand( QgsProcessingModelAlgorithm *model, const QString &text, const QString &idString, QUndoCommand *parent SIP_TRANSFERTHIS = nullptr );

    void saveAfterState();
 
    int id() const override;
    void undo() override;
    void redo() override;
    bool mergeWith( const QUndoCommand *other ) override;

    CommandOperation operation() const { return mOperation; }

    QString idString() const { return mIdString; }
 
  private:
    bool mFirstRun = true;
 
    QgsProcessingModelAlgorithm *mModel = nullptr;
    QVariant mBeforeState;
    QVariant mAfterState;
    CommandOperation mOperation = CommandOperation::Unknown;
    QString mIdString;
};

 
#endif // QGSMODELUNDOCOMMAND_H