countdown.h

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/* countdown.h
 *
 * Copyright (c) 2019 Thomas Kais
 *
 * This file is subject to the terms and conditions defined in
 * file 'COPYING', which is part of this source code package.
 */
#ifndef COUNTDOWN_H
#define COUNTDOWN_H
 
#include <QObject>
#include <QTimer>
 
namespace FotoBox {
 
class Countdown : public QObject
{
    Q_OBJECT
 
public:
    explicit Countdown(QObject *parent = nullptr, unsigned int i_seconds = 0);
 
    ~Countdown() override = default;
 
    Countdown(const Countdown &other) = delete;
 
    Countdown &operator=(const Countdown &other) = delete;
 
    Countdown(Countdown &&other) = delete;
 
    Countdown &operator=(Countdown &&other) = delete;
 
    void setStartTime(unsigned int i_seconds);
 
    auto isActive() const -> bool;
 
    auto start() -> bool;
 
    auto stop() -> bool;
 
    auto reset() -> bool;
 
Q_SIGNALS:
    void update(unsigned int /*_t1*/);
 
    void elapsed();
 
private:
    void updateTimeLeft();
 
    QTimer m_timer;
 
    unsigned int m_startTime;
 
    unsigned int m_timeLeft;
 
    bool m_isActive{false};
 
    static constexpr int ONE_SECOND = 1000;
};
 
} // end namespace FotoBox
 
#endif // COUNTDOWN_H