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 // SPDX-FileCopyrightText: 2015 by Martin Gräßlin <mgraesslin@kde.org>
 // SPDX-FileCopyrightText: 2022 Aleix Pol Gonzalez <aleixpol@kde.org>
 //
 // SPDX-License-Identifier: LGPL-2.1-or-later
 
 #ifndef ABSTRACTDPMSHELPER_H
 #define ABSTRACTDPMSHELPER_H
 
 #include "dpms.h"
 #include <QObject>
 #include <optional>
 
 class QScreen;
 
 namespace KScreen
 {
 
 class AbstractDpmsHelper : public QObject
 {
     Q_OBJECT
 public:
     virtual ~AbstractDpmsHelper();
 
     virtual void trigger(Dpms::Mode, const QList<QScreen *> &screens) = 0;
 
     bool isSupported()
     {
         if (!m_supported.has_value()) {
             blockUntilSupported();
         }
         Q_ASSERT(m_supported.has_value());
         return *m_supported;
     }
     void setSupported(bool supported)
     {
         if (m_supported != supported) {
             m_supported = supported;
             Q_EMIT supportedChanged(supported);
         }
     }
     void setHasPendingChanges(bool hasThem)
     {
         if (m_hasPendingChanges != hasThem) {
             return;
         }
         m_hasPendingChanges = hasThem;
         Q_EMIT hasPendingChangesChanged(hasThem);
     }
 
     bool hasPendingChanges() const
     {
         return m_hasPendingChanges;
     }
 
 Q_SIGNALS:
     void supportedChanged(bool supported);
     void modeChanged(Dpms::Mode mode, QScreen *screen);
     void hasPendingChangesChanged(bool pendingChanges);
 
 private:
     virtual void blockUntilSupported() {}
 
     std::optional<bool> m_supported;
     bool m_hasPendingChanges = false;
 };
 
 }
 
 #endif