The other end can then connect the signal by prepending the word on and In our example, the Receiver class defines a Please note that Qt has a specific naming convention that needs to be respectedįor the connection to work. Receiver objects signals and slots to QML. In order to do this, one needs to get the rootContext from the QMLĬtx->setContextProperty('receiver', &receiver) Įngine.load(QUrl(QStringLiteral('qrc:///main.qml'))) Īs mentioned in the overview, there is no need to manually connect the C++ We have seen how to connect C++ and QML, but what is left is the task ofĪctually embedding the C++ object into QML. import QtQuick 2.2Ĭonsole.log('Received in QML from C++: ' + count) In order to receive the C++ signal, the QML To invoke the C++ slot, a QML program can then simply call the respectiveįunction on the embedded object. The signal is sent to QML, and the slot is invoked from QML. ThisĬlass defines a signal sendToQml and a slot receiveFromQml. In our example, we have a Receiver class that is implemented in C++. This has the advantage that no Qt::connect connections need to be set-up manually. In this article, we show how to do this by embedding a C++ class directly into QML. There are different ways to send signals from C++ to QML and back.
This allows one to use C++ together with QML. In Qt Creator, chooce a project of type Qt Quick Application.