Автообновление QFileSystemModel при появлении флешки

Вот когда-то писал нотифиер.
devicenotifier.h

Код

C++ (Qt)
#ifndef DEVICENOTIFIER_H
#define DEVICENOTIFIER_H
 
#include <QtCore/QObject>
 
class DeviceNotifier : public QObject
{
	Q_OBJECT
 
public:
	static DeviceNotifier *instance();
	virtual ~DeviceNotifier();
 
protected:
	explicit DeviceNotifier (QObject *parent = 0);
 
private:
	static DeviceNotifier *pInstance;
 
Q_SIGNALS:
	void deviceListChanged ();
};
 
#endif //DEVICENOTIFIER_H

devicenotifier_win.cpp

Код

C++ (Qt)
#include <QtCore/QCoreApplication>
#include <QtCore/QDebug>
 
#include "qt_windows.h"
#include "dbt.h"
 
 
#include "devicenotifier.h"
 
Q_CORE_EXPORT HINSTANCE qWinAppInst ();
 
DeviceNotifier *DeviceNotifier::pInstance = 0;
 
HWND wnd = 0;
 
void createWindow ();
LRESULT CALLBACK windowProc (HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam);
void destroyWindow ();
 
DeviceNotifier *DeviceNotifier::instance ()
{
	if (!DeviceNotifier::pInstance) {
		pInstance = new DeviceNotifier (QCoreApplication::instance ());
	}
 
	return pInstance;
}
 
DeviceNotifier::DeviceNotifier (QObject *parent)
	: QObject (parent)
{
	createWindow ();
}
 
DeviceNotifier::~DeviceNotifier ()
{
	if (pInstance == this) {
		pInstance = 0;
		destroyWindow ();
	}
}
 
void createWindow ()
{
	WNDCLASS wc;
	wc.style = 0;
	wc.lpfnWndProc = windowProc;
	wc.cbClsExtra = 0;
	wc.cbWndExtra = 0;
	wc.hInstance = 0;
	wc.hIcon = 0;
	wc.hCursor = 0;
	wc.hbrBackground = 0;
	wc.lpszMenuName = 0;
	wc.lpszClassName = L"DeviceNotifierWindow";
 
	RegisterClass (&wc);
 
	wnd = CreateWindow (wc.lpszClassName,
						wc.lpszClassName,
						0,
						0,
						0,
						0,
						0,
						0,
						0,
						0,
						0);
	if (!wnd) {
		qDebug () << QString ("Error creating DeviceNotifier window %1")
			   .arg (static_cast <int> (GetLastError()));
	}
}
 
LRESULT CALLBACK windowProc (HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam)
{
	switch (message) {
		case WM_DEVICECHANGE:
			switch (wParam) {
				case DBT_DEVICEARRIVAL:
				case DBT_DEVICEREMOVECOMPLETE:
					QMetaObject::invokeMethod (DeviceNotifier::instance (),
											   "deviceListChanged",
											   Qt::AutoConnection);
					break;
			}
			break;
	}
 
	return DefWindowProc (hwnd, message, wParam, lParam);
}
 
void destroyWindow ()
{
	if (wnd) {
		DestroyWindow (wnd);
	}
 
	UnregisterClass (L"DeviceNotifierWindow", 0);
}

devicenotifier_unix.cpp

Код

C++ (Qt)
#include <QtCore/QCoreApplication>
#include <QtCore/QFileSystemWatcher>
#include <QtCore/QStringList>
 
#include "devicenotifier.h"
 
QFileSystemWatcher *watcher = 0;
 
DeviceNotifier *DeviceNotifier::pInstance = 0;
 
DeviceNotifier *DeviceNotifier::instance ()
{
	if (!pInstance) {
		pInstance = new DeviceNotifier (QCoreApplication::instance ());
	}
 
	return pInstance;
}
 
DeviceNotifier::DeviceNotifier (QObject *parent)
	: QObject (parent)
{
	if (!watcher) {
		watcher = new QFileSystemWatcher ();
		watcher->addPath ("/dev");
		connect (watcher, SIGNAL (directoryChanged (QString)),
				 this, SIGNAL (deviceListChanged ()));
	}
}
 
DeviceNotifier::~DeviceNotifier ()
{
	if (pInstance == this) {
		if (watcher) {
			watcher->deleteLater();
		}
		pInstance = 0;
	}
}