#include <QGuiApplication>
#include <QWindow>
#include <QQuickView>
#include <QQmlComponent>
#include <QAbstractNativeEventFilter>
#include <QQmlEngine>

#include <qt_windows.h>

class MyNativeEventFilter: public QAbstractNativeEventFilter
{
public:
    virtual bool nativeEventFilter(const QByteArray &eventType, void *message, long *result) Q_DECL_OVERRIDE
    {
        MSG* msg = (MSG*)(message);
        int xPos, yPos;
        switch (msg->message) {
        case WM_TOUCH: {
            UINT cInputs = LOWORD(msg->wParam);
            PTOUCHINPUT pInputs = new TOUCHINPUT[cInputs];
            GetTouchInputInfo((HTOUCHINPUT)msg->lParam, cInputs, pInputs, sizeof(TOUCHINPUT));

            PTOUCHINPUT firstPoint = &pInputs[0];
            int xPos, yPos;

            xPos = (firstPoint->x) / 100;
            yPos = (firstPoint->y) / 100;

            QPoint p(xPos, yPos);
            m_points.append(p);

            if (firstPoint->dwFlags & TOUCHEVENTF_UP) {
                qDebug() << m_points.count();
                qDebug() << m_points;
                m_points.clear();
            }
        }
        }

        return false;
    }

    QVector<QPoint> m_points;
};

int main(int argc, char *argv[])
{
    QGuiApplication a(argc, argv);
    QGuiApplication::instance()->installNativeEventFilter(new MyNativeEventFilter());

    auto args = QGuiApplication::arguments();

    if (args.count() == 1) {
        QWindow w;
        w.setTitle("Widget example");
        w.showMaximized();

        return a.exec();
    } else {
        QQmlEngine engine;
        QQmlComponent *component = new QQmlComponent(&engine);
        QObject::connect(&engine, SIGNAL(quit()), QCoreApplication::instance(), SLOT(quit()));

        component->setData("import QtQuick 2.10 \n"
                           "import QtQuick.Window 2.10 \n"
                           "Window { \n"
                           "    visible: true \n"
                           "    title: qsTr(\"Hello World\") \n"
                           "}", QUrl())
                           ;
        if (!component->isReady() ) {
            qWarning("%s", qPrintable(component->errorString()));
            return -1;
        }

        QObject *topLevel = component->create();
        QQuickWindow *window = qobject_cast<QQuickWindow *>(topLevel);
        window->setTitle("QML example");
        window->showMaximized();

        return a.exec();
    }
}