QtQuick demo about signal in QML and slot in C++

main.cpp

#include <QtGui/QGuiApplication>
#include "signalslotlistview.h"
#include <QtQuick/QQuickItem>
#include <QtQuick/QQuickView>

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

    QQuickView *view = new QQuickView();
    view->setSource(QUrl::fromLocalFile("qml/testsignal/main.qml"));
    QObject *rect = dynamic_cast<QObject*>(view->rootObject());
    SignalslotlistView myClass;
    QObject::connect(rect, SIGNAL(qmlSignal(QString)),
                     &myClass, SLOT(cppSlot(QString)));
    view->show();
    return app.exec();
}

main.qml

import QtQuick 2.0

Rectangle {
    id: test
    width:  200
    height: 50
    x: 10
    y: 10
    signal qmlSignal(string msg)

    MouseArea {
        hoverEnabled: false
        anchors.fill: parent
        onClicked: {
            console.log("geklickt")
            test.qmlSignal("asdf")
        }
    }
}

signalslotlistview.h

#ifndef SIGNALSLOTLISTVIEW_H
#define SIGNALSLOTLISTVIEW_H

#include <QObject>
#include <QDebug>

class SignalslotlistView : public QObject
{
    Q_OBJECT
public:
    explicit SignalslotlistView(QObject *parent = 0);

signals:

public slots:
    void cppSlot(const QString &msg) {
        qDebug() << "received " << msg;
    }
};

#endif // SIGNALSLOTLISTVIEW_H

signalslotview.cpp

#include "signalslotlistview.h"

SignalslotlistView::SignalslotlistView(QObject *parent) :
    QObject(parent)
{
}

testsignal.pro

SOURCES += main.cpp \
    signalslotlistview.cpp


HEADERS += \
    signalslotlistview.h

QT += quick

OTHER_FILES += \
    qml/testsignal/main.qml