Adding a QDialog to a QML Application?

[EStudley]

So using Qt 5.2 I created a Qt Quick Application project, which comes with qtquick2applicationviewer .h and .cpp, a main.cpp, and QML files.

I want to add a .cpp and .h file to control system notifications based on things that happen in the main QML application. I was following the example here http://doc.qt.digia.com/4.6/desktop-systray.html but that is a QWidget in itself, not a QML view. I thought I could just create a C++ class that extends QDialog that i could call to display system notifications, but it seems it just doesn't work that way?

Here's my current code:

@#ifndef NOTIFICATIONS_H
#define NOTIFICATIONS_H

#include <QtGui>
#include <QSystemTrayIcon>
#include <QObject>
#include <QString>
#include <QDialog>

class notifications : public QDialog
{
Q_OBJECT

public:
explicit notifications();
~notifications();

private:
QAction *quitAction;
QSystemTrayIcon *trayIcon;
QMenu *trayIconMenu;
void createActions();
void createTrayIcon();
void createTrayIconMenu();
};

#endif // NOTIFICATIONS_H@

@#include "notifications.h"
#include <QSystemTrayIcon>
#include <QDialog>
#include <QMenu>

notifications::notifications()
{
createActions();
createTrayIcon();
createTrayIconMenu();
}

notifications::~notifications()
{
}

void notifications::createActions()
{
quitAction = new QAction("&Quit", this);
connect(quitAction, SIGNAL(triggered()), qApp, SLOT(quit()));
}

void notifications::createTrayIcon()
{
trayIconMenu = new QMenu(this);
trayIconMenu->addAction(quitAction);
trayIcon = new QSystemTrayIcon(this);
trayIcon->setContextMenu(trayIconMenu);
}@

Now all Qt Creator says is "QWidget: Cannot create a QWidget without QApplication." Does that mean I have to implement my entire QML application as a QApplication in Qt instead?