QML & C++ : ReferenceError

[ayman]

Hi,
I'm writing a QtQuick app, and I need to use some Qt C++ functions, but when I try to access to my class method I get this error: file:///C:/QtDev/test022-build-simulator-Simulator_Qt_for_MinGW_4_4__Qt_SDK__Debug/qml/test022/MainPage.qml:20: ReferenceError: Can't find variable: TestClass

I also tried with a small example (the source code is below), and I get the same error, please someone have an idea why I get this error?

main.cpp
@#include <QtGui/QApplication>
#include <QtDeclarative>
#include "qmlapplicationviewer.h"
#include "testclass.h"

Q_DECL_EXPORT int main(int argc, char *argv[])
{
QScopedPointer<QApplication> app(createApplication(argc, argv));

QmlApplicationViewer viewer;

TestClass testClass;

QDeclarativeContext *context = viewer.rootContext();
context->setContextProperty("TestClass", &testClass);


viewer.setMainQmlFile(QLatin1String("qml/test022/main.qml"));
viewer.showExpanded();

return app->exec();

}
@

testclass.h
@#ifndef TESTCLASS_H
#define TESTCLASS_H

#include <Qt>
#include <QObject>
#include <QDebug>
#include <QtDeclarative>

class TestClass : public QObject
{
Q_OBJECT
public:

TestClass(){}

Q_INVOKABLE QString showText(QString txt){

    qDebug() << txt;

    QDeclarativeEngine engine;
    QDeclarativeComponent component(&engine, QUrl::fromLocalFile&#40;"qml/test022/MainPage.qml"&#41;&#41;;
    if (component.status() == 1){
        QObject *object = component.create();
        QVariant returnedValeur;
        QVariant msg = "002";
        QMetaObject::invokeMethod(object, "jsFunction",Q_RETURN_ARG(QVariant, returnedValeur), Q_ARG(QVariant, msg));
        qDebug() << returnedValeur.toString();
    }
    engine.deleteLater();
    return "OK";
}

};

#endif // TESTCLASS_H@

main.qml
@import QtQuick 1.1
import com.nokia.symbian 1.1
import com.nokia.extras 1.1

PageStackWindow {
id: window
initialPage: MainPage {tools: toolBarLayout}
showStatusBar: true
showToolBar: true

ToolBarLayout {
    id: toolBarLayout
    ToolButton {
        flat: true
        iconSource: "toolbar-back"
        onClicked: window.pageStack.depth <= 1 ? Qt.quit() : window.pageStack.pop()
    }
}

}@

MainPage.qml
@import QtQuick 1.1
import com.nokia.symbian 1.1
import com.nokia.extras 1.1

Page {
id: mainPage

function jsFunction(jsVar){
    console.log(jsVar)
    return "003"
}

Text {
    anchors.centerIn: parent
    text: qsTr("Hello world!")
    color: platformStyle.colorNormalLight
    font.pixelSize: 20
}

Component.onCompleted: TestClass.showText("001")

}@