exam_timer_teacher/qtsingleapplication/qtsingleapplication.h

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** Copyright (C) 2016 The Qt Company Ltd.
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#include <QApplication>

QT_FORWARD_DECLARE_CLASS(QSharedMemory)

namespace SharedTools {

class QtLocalPeer;

class QtSingleApplication : public QApplication
{
    Q_OBJECT

public:
    QtSingleApplication(const QString &id, int &argc, char **argv);
    ~QtSingleApplication();

    bool isRunning(qint64 pid = -1);

    void setActivationWindow(QWidget* aw, bool activateOnMessage = true);
    QWidget* activationWindow() const;
    bool event(QEvent *event) override;

    QString applicationId() const;
    void setBlock(bool value);

    bool sendMessage(const QString &message, int timeout = 5000, qint64 pid = -1);
    void activateWindow();

Q_SIGNALS:
    void messageReceived(const QString &message, QObject *socket);
    void fileOpenRequest(const QString &file);

private:
    QString instancesFileName(const QString &appId);

    qint64 firstPeer;
    QSharedMemory *instances;
    QtLocalPeer *pidPeer;
    QWidget *actWin;
    QString appId;
    bool block;
};

} // namespace SharedTools