Hey,
i try to connect cpp with QML and had a build Error that i can’t resolve.
I copyed the code based on website (doc-snapshot.qt-project.org/5.0/qtqml/qtqml-cppintegration-interactqmlfromcpp.html)
Subtopic “Connecting to QML Signals”
// MyItem.qml
import QtQuick 2.0
Item {
id: item
width: 100; height: 100
signal qmlSignal(string msg)
MouseArea {
anchors.fill: parent
onClicked: item.qmlSignal("Hello from QML")
}
}
class MyClass : public QObject
{
Q_OBJECT
public slots:
void cppSlot(const QString &msg) {
qDebug() << "Called the C++ slot with message:" << msg;
}
};
int main(int argc, char *argv[]) {
QGuiApplication app(argc, argv);
QQuickView view(QUrl::fromLocalFile("MyItem.qml"));
QObject *item = view.rootObject();
MyClass myClass;
QObject::connect(item, SIGNAL(qmlSignal(QString)),
&myClass, SLOT(cppSlot(QString)));
view.show();
return app.exec();
}
If i try to run it i get the error:
Error:C2440: ‘Initialition’: ‘QQuickView’ can not in ‘QObject *’ convert ***(i translate the error from german to english)
Have any one a good tip to solve this ?
I try some variants with dynamic cast i found on stack overflow but without any success :(
Thank you for your help !
↧
