How to bind QML /C++ class on QtQuick2ControlsApplicationViewer

yufit_in_Japan

Currently I'm developing QtQuick application by QtCreator3.0.0, Qt5.2.0, and MSVC2012.
I want to make an application that calls C++ function from qml.
Based on "this article":http://qt-project.org/forums/viewthread/22685, it works when I use QtQuick2ApplicationViewer for QtQuick2 application.

@
#include <QtGui/QGuiApplication>
#include "qtquick2applicationviewer.h"
#include <QQmlContext>
#include "testclass.h"
int main(int argc, char *argv[])
{
QGuiApplication app(argc, argv);
TestClass cppObj;
QtQuick2ApplicationViewer viewer;
viewer.rootContext()->setContextProperty("cppObj", &cppObj);
viewer.setMainQmlFile(QStringLiteral("qml/QtQuick2CppTest/main.qml"));
viewer.showExpanded();

return app.exec();

}
@

For QtQuick Controls application, it requires QtQuick2ControlsApplicationViewer instead of QtQuick2ApplicationViewer. But it doesn't have the method "rootContext()".

How should I bind QML and C++ class in this case.

JKSH

Hi,

-Qt Quick Controls is just another module that contains Qt Quick items. You can still use QtQuick2ApplicationViewer.-

yufit_in_Japan

Thank you for your advice.

[quote author="JKSH" date="1390653249"]Hi,

Qt Quick Controls is just another module that contains Qt Quick items. You can still use QtQuick2ApplicationViewer.
[/quote]

When "ApplicationWindow" element is used in my application, it doesn't work on QtQuick2ApplicationViewer. According to "this article":http://stackoverflow.com/questions/21311951/how-to-run-an-application-which-import-qtquick2-0-and-qtquick-controls-1-1, I was advised that QtQuick2ControlsApplicationViewer should be used for QtQuick Controls application.
Did I misunderstand something?

JKSH

My apologies, I was mistaken. You're right, ApplicationWindow cannot be used with QtQuick2ApplicationViewer which subclasses QQuickView.

Ok, note that QtQuick2ControlsApplicationViewer is not actually part of Qt. Its code is auto-generated when you create a new Qt Quick Controls project. That means you can modify QtQuick2ControlsApplicationViewer.

The code generator forgot to provide a function to get the root context. You can add it yourself:

@
QQmlContext* QtQuick2ControlsApplicationViewer::rootContext() {
return d->engine.rootContext();
}
@

There is a bug report that describes this oversight: https://bugreports.qt-project.org/browse/QTCREATORBUG-11048

yufit_in_Japan

@JKSH
Thanks to your polite response , my application works finally.

Actually I didn't notice that QtQuick2ControlsApplicationViewer is automatically generated by QtCreator project wizard until I had read your comment.

My problem has been completely solved:)

JKSH

You're welcome :)

Happy coding!