DeviceWatcher.h

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#pragma once
#include "DLLInfo.h"
#include <QtCore/QEvent>
#include <QtCore/QObject>
namespace NDEVR
{
    class DeviceWatcherPrivate;
    /**--------------------------------------------------------------------------------------------------
    \brief Watches and alerts the program when a USB device is plugged in or unplugged.
    **/
    class NDEVR_WIDGETS_API DeviceWatcher : public QObject
    {
        Q_OBJECT
        Q_DECLARE_PRIVATE(DeviceWatcher)
    public:
        explicit DeviceWatcher(QObject* parent = 0);
        ~DeviceWatcher();
 
        bool start();
        bool stop();
        bool isRunning() const;
 
        void appendEventReceiver(QObject* receiver);
        static DeviceWatcher& DefaultWatcher();
    signals:
        void deviceAdded(const QString& dev);
        void deviceChanged(const QString& dev); //when umounting the device
        void deviceRemoved(const QString& dev);
 
    protected:
        bool running;
        DeviceWatcherPrivate* d_ptr;
    };
 
    /**--------------------------------------------------------------------------------------------------
    \brief The event that is triggered when a USB device is plugged in or unplugged.
    **/
    class NDEVR_WIDGETS_API QDeviceChangeEvent : public QEvent
    {
    public:
        enum Action { Add, Remove, Change };
        //static const Type EventType; //VC link error
 
        explicit QDeviceChangeEvent(Action action, const QString& device);
 
        Action action() const { return m_action; }
        QString device() const { return m_device; }
        static Type registeredType()
        {
            static Type EventType = static_cast<Type>(registerEventType());
            return EventType;
        }
 
    private:
        Action m_action;
        QString m_device;
    };
}