Sending signal from Qt Quick ApplicationWindow to C++ class

[QTBeginner42]

I want to receive a signal of an ApplicationWindow started by a QQmlApplicationEngine in my C++ object.
But I don't know, how I can connect my Application window with this C++ object, see the '???' comment in my code.

myObject.cpp
@
startApplicationWindow() {
engine.load(QUrl(QStringLiteral("qrc:///main.qml"))); //engine is a QQmlApplicationEngine
QObject::connect(/* ??? */, SIGNAL( workDone() ), this, SLOT( doAction() )
}

doAction() { //code } //as public slot in myObject.h declared
@

main.qml
@
import QtQuick 2.2
import QtQuick.Controls 1.1
import QtQuick.Dialogs 1.1

ApplicationWindow {
id : root
visible: true
width: 100
height: 100
title: qsTr("Window")
signal workDone()

Button {
    id: button
    x: 42
    y: 42
    text: qsTr("press")
    onClicked: { workDone() }
}

}
@

[DeeeZ]

From QML you can change properties and call method of objects created from C++. So It's not necessary to use a signal

[andreyc]

Take a look on "Integrating QML and C++":http://qt-project.org/doc/qt-5/qtqml-cppintegration-topic.html and "Exposing Attributes of C++ Types to QML":http://qt-project.org/doc/qt-5/qtqml-cppintegration-exposecppattributes.html

[QTBeginner42]

Thanks for the answers. In my case it is enough to call a method of the object. It works.

But is there not a possibility to connect the ApplicationWindow with an object? I think the ApplicationWindow should know so few as possible about the C++ objects.

[SGaist]

Hi and welcome to devnet,

Do you mean like described "here":http://qt-project.org/doc/qt-5/qtqml-cppintegration-interactqmlfromcpp.html#connecting-to-qml-signals ?