53 lines
1.1 KiB
C++
53 lines
1.1 KiB
C++
/*
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This file is part of KDDockWidgets.
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SPDX-FileCopyrightText: 2019 Klarälvdalens Datakonsult AB, a KDAB Group company <info@kdab.com>
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Author: Waqar Ahmed <waqar.ahmed@kdab.com>
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SPDX-License-Identifier: GPL-2.0-only OR GPL-3.0-only
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Contact KDAB at <info@kdab.com> for commercial licensing options.
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*/
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#ifndef KDDW_VIEW_GUARD_H
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#define KDDW_VIEW_GUARD_H
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#include "kddockwidgets/docks_export.h"
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#include "kdbindings/signal.h"
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namespace KDDockWidgets {
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namespace Core {
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class View;
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/// @brief This class provides a weak reference to a view
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/// i.e., it becomes null automatically once a View is destroyed
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class DOCKS_EXPORT ViewGuard
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{
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public:
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ViewGuard(View *v);
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ViewGuard(const ViewGuard &);
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~ViewGuard();
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operator bool() const;
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View *operator->();
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const View *operator->() const;
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void clear();
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bool isNull() const;
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View *view() const;
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ViewGuard &operator=(View *);
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ViewGuard &operator=(const ViewGuard &);
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private:
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void setView(View *);
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View *v = nullptr;
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KDBindings::ConnectionHandle m_onDestroy;
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};
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}
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}
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#endif
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