chatserver.h Example File | Qt WebChannel 5.5

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- Qt WebChannel Chatserver Example
- chatserver.h Example File
- Qt 5.5.1 Reference Documentation

# chatserver.h Example File

chatserver-cpp/chatserver.h

    /****************************************************************************
    **
    ** Copyright (C) 2014 Klarälvdalens Datakonsult AB, a KDAB Group company, info@kdab.com, author Milian Wolff <milian.wolff@kdab.com>
    ** Contact: http://www.qt.io/licensing/
    **
    ** This file is part of the QtWebChannel module of the Qt Toolkit.
    **
    ** $QT_BEGIN_LICENSE:LGPL21$
    ** 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 http://www.qt.io/terms-conditions. For further
    ** information use the contact form at http://www.qt.io/contact-us.
    **
    ** GNU Lesser General Public License Usage
    ** Alternatively, this file may be used under the terms of the GNU Lesser
    ** General Public License version 2.1 or version 3 as published by the Free
    ** Software Foundation and appearing in the file LICENSE.LGPLv21 and
    ** LICENSE.LGPLv3 included in the packaging of this file. Please review the
    ** following information to ensure the GNU Lesser General Public License
    ** requirements will be met: https://www.gnu.org/licenses/lgpl.html and
    ** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
    **
    ** As a special exception, The Qt Company gives you certain additional
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    ** $QT_END_LICENSE$
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    ****************************************************************************/

    #ifndef ChatServer_H
    #define ChatServer_H

    #include <QObject>
    #include <QStringList>

    class QTimer;

    class ChatServer : public QObject
    {
        Q_OBJECT

        Q_PROPERTY(QStringList userList READ userList NOTIFY userListChanged)

    public:
        explicit ChatServer(QObject *parent = 0);
        virtual ~ChatServer();

    public:
        //a user logs in with the given username
        Q_INVOKABLE bool login(const QString& userName);

        //the user logs out, will be removed from userlist immediately
        Q_INVOKABLE bool logout(const QString& userName);

        //a user sends a message to all other users
        Q_INVOKABLE bool sendMessage(const QString& user, const QString& msg);

        //response of the keep alive signal from a client.
        // This is used to detect disconnects.
        Q_INVOKABLE void keepAliveResponse(const QString& user);

        QStringList userList() const;

    protected slots:
        void sendKeepAlive();
        void checkKeepAliveResponses();

    signals:
        void newMessage(QString time, QString user, QString msg);
        void keepAlive();
        void userListChanged();
        void userCountChanged();

    private:
        QStringList m_userList;
        QStringList m_stillAliveUsers;
        QTimer* m_keepAliveCheckTimer;
    };

    #endif // ChatServer_H