/****************************************************************************
**
** Copyright (C) 2019 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of the documentation of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:FDL$
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and The Qt Company. For licensing terms
** and conditions see https://www.qt.io/terms-conditions. For further
** information use the contact form at https://www.qt.io/contact-us.
**
** GNU Free Documentation License Usage
** Alternatively, this file may be used under the terms of the GNU Free
** Documentation License version 1.3 as published by the Free Software
** Foundation and appearing in the file included in the packaging of
** this file. Please review the following information to ensure
** the GNU Free Documentation License version 1.3 requirements
** will be met: https://www.gnu.org/licenses/fdl-1.3.html.
** $QT_END_LICENSE$
**
****************************************************************************/

/*!
    \page qtcore-index.html
    \title Qt Core

    \brief The Qt Core module is part of Qt's essential modules.

    \section1 Core Functionalities

    Qt Core adds these features to C++:

    \list
    \li a very powerful mechanism for seamless object communication called
    signals and slots
    \li queryable and designable object properties
    \li hierarchical and queryable object trees that organize
    \li object ownership in a natural way with guarded pointers (QPointer)
    \li a dynamic cast that works across library boundaries
    \endlist

    The following pages provide more information about Qt's core features:
    \list
    \li \l{The Meta-Object System}
    \li \l{The Property System}
    \li \l{Object Model}
    \li \l{Object Trees & Ownership}
    \li \l{Signals & Slots}
    \endlist

    \include module-use.qdocinc using qt module
    \quotefile overview/using-qt-core.cmake

    See also the \l{Build with CMake} overview.

    \section2 Building with qmake

    If you use \l qmake to build your projects, Qt5Core is linked by default.

    \section1 Threading and Concurrent Programming

    Qt provides thread support in the form of platform-independent \l{Threading
    Classes}{threading classes}, a thread-safe way of posting events, and
    signal-slot connections across threads. Multithreaded programming is also a
    useful paradigm for performing time-consuming operations without freezing
    the user interface of an application.

    The \l{Thread Support in Qt} page contains information on implementing
    threads in applications. Additional concurrent classes are provided by the
    \l{Qt Concurrent} module.

    \section1 Input/Output, Resources, and Containers

    Qt provides a resource system for organizing application files and assets,
    a set of containers, and classes for receiving input and printing output.
    \list
    \li \l{Container Classes}
    \li \l{Serializing Qt Data Types}
    \li \l{Implicit Sharing}
    \endlist

    In addition, Qt Core provides a platform-independent mechanism for storing
    binary files in the application's executable.

    \list
    \li \l{The Qt Resource System}
    \endlist

    \section1 Additional Frameworks
    Qt Core also provides some of Qt's key frameworks.

    \list
    \li \l{The Animation Framework}
    \li \l{JSON Support in Qt}
    \li \l{The State Machine Framework}
    \li \l{How to Create Qt Plugins}
    \li \l{The Event System}
    \endlist

    \section1 Licenses and Attributions

    Qt Core is available under commercial licenses from \l{The Qt Company}.
    In addition, it is available under free software licenses. Since Qt 5.4,
    these free software licenses are
    \l{GNU Lesser General Public License, version 3}, or
    the \l{GNU General Public License, version 2}.
    See \l{Qt Licensing} for further details.

    Executables on Windows potentially link
    against \l{The qtmain Library}. This library is available
    under commercial licenses and also under the
    \l{BSD 3-clause "New" or "Revised" License}.

    Furthermore, Qt Core in Qt \QtVersion may contain third party
    modules under following permissive licenses:

    \generatelist{groupsbymodule attributions-qtcore}

    \section1 Reference
    These are links to the API reference materials.
    \list
    \li \l{Qt Core C++ Classes}{C++ Classes}
        \list
        \li \l{Animation Framework}{Animation Classes}
        \li \l{Threading Classes}
        \li \l{Container Classes}
        \li \l{Plugin Classes}
        \li \l{Implicitly Shared Classes}
        \li \l{State Machine Classes}
        \li \l{Input/Output and Networking}{Input/Output Classes}
        \li \l{Event Classes}
        \endlist
    \endlist

*/