qgsfeedback.h

Go to the documentation of this file.

/***************************************************************************
  qgsfeedback.h
  --------------------------------------
  Date                 : July 2016
  Copyright            : (C) 2016 by Martin Dobias
  Email                : wonder dot sk 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 QGSFEEDBACK_H
#define QGSFEEDBACK_H

#include <QObject>

class CORE_EXPORT QgsFeedback : public QObject
{
    Q_OBJECT
  public:
    QgsFeedback( QObject* parent = nullptr )
        : QObject( parent )
        , mCancelled( false )
    {}

    virtual ~QgsFeedback() {}

    void cancel()
    {
      if ( mCancelled )
        return;  // only emit the signal once
      mCancelled = true;
      emit cancelled();
    }

    bool isCancelled() const { return mCancelled; }

  signals:
    void cancelled();

  private:
    bool mCancelled;
};

#endif // QGSFEEDBACK_H