chatserver.h Example File | Qt WebChannel 5.6

Qt 5.6 | Qt WebChannel | Qt WebChannel ChatServer Example | chatserver.h Example File

Qt 5.6.3 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
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      ** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
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      ** As a special exception, The Qt Company gives you certain additional
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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