14.1.361. tablet_qt/qobjects/threadworker.h

/*
    Copyright (C) 2012-2019 Rudolf Cardinal (rudolf@pobox.com).

    This file is part of CamCOPS.

    CamCOPS 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 3 of the License, or
    (at your option) any later version.

    CamCOPS is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with CamCOPS. If not, see <http://www.gnu.org/licenses/>.
*/

#pragma once
#include <functional>
#include <QObject>


class ThreadWorker : public QObject
{
    // Helper object for SlowNonGuiFunctionCaller.
    // Encapsulates the call to the expensive function.
    // The controller sets the ThreadWorker up in a separate thread.

    Q_OBJECT

public:
    using PlainWorkerFunction = std::function<void()>;

    ThreadWorker(const PlainWorkerFunction& func);

public slots:
    // Calls the user's function, then emits workComplete().
    void work();

signals:
    void workComplete();

protected:
    PlainWorkerFunction m_plainfunc;
};