Qt Quick 2.0 how to publish viewer class to QML [ SOLVED ]

[majster]

Hi!

I'm developing desktop app using Qt Quick 2.0 and I need to be able to access viewer class through QML in order to hide/minimise application ( I'm building app with custom window decorations ).
I fallowed this thread "[Link]":http://qt-project.org/forums/viewthread/3495 but no luck.

This is my main.cpp:

@
#include <QtGui/QGuiApplication>
#include "qtquick2applicationviewer.h"

int main(int argc, char *argv[])
{
QGuiApplication app(argc, argv);

QtQuick2ApplicationViewer viewer;

// viewer.rootContext()->setContextProperty("QmlApplicationViewer", (QObject *)&viewer);
viewer.setFlags(Qt::FramelessWindowHint);
viewer.setMainQmlFile(QStringLiteral("qml/ubusell/main.qml"));
viewer.showExpanded();

return app.exec();

}

@

After I add this line to default main.cpp file:
@
viewer.rootContext()->setContextProperty("QmlApplicationViewer", (QObject *)&viewer);
@

I get this error:
@
In function 'int main(int, char**)':
error: invalid use of incomplete type 'class QQmlContext'
error: forward declaration of 'class QQmlContext'
@

Any ideas ?
Thanks!

[sierdzio]

Add this to your includes:
@
#include <QQmlContext>
@

[majster]

It works now, Thank you so much sierdzio!

[sierdzio]

Pleasure. Happy further coding!