[solved] Access to custom CPP object

helenebro

Hi,
I have an application with one part develop with Cpp and one part with QML. The first part enable to get data from database and the QML part display result. I search the best way to get the data. I've tried to use Q_PROPERTY and qmlRegisterType without succeed.
When I run the app, I see "my object [object Object] undefined" and the "onMyObjectChanged" seems not be activated;

main.cpp

#include <QGuiApplication>
#include <QQmlApplicationEngine>
#include "myapp.h"
#include <QQmlContext>
#include <QQmlComponent>
#include "myobject.h"

int main(int argc, char *argv[])
{
    QGuiApplication app(argc, argv);
    QQmlApplicationEngine engine;
    QQmlContext *context = engine.rootContext();
    MyApp *myApp = new MyApp();
    context->setContextProperty("myLib", myApp);
    qmlRegisterType<MyObject>("Test", 1, 0, "MyCppObject");
    engine.load(QUrl(QStringLiteral("qrc:/main.qml")));
    return app.exec();
}

myapp.h

#ifndef MYAPP_H
#define MYAPP_H

#include <QObject>
#include "QDebug"
#include "myobject.h"

class MyApp : public QObject
{
    Q_OBJECT
    Q_PROPERTY(MyObject* monObjet READ myObject NOTIFY myObjectChanged)
public:
    explicit MyApp(QObject *parent = 0);
    Q_INVOKABLE void action();
    MyObject* myObject();
signals:
    void myObjectChanged();
private :
    MyObject *m_myObject;
};
#endif // MYAPP_H@

myapp.cpp

#include "myapp.h"
MyApp::MyApp(QObject *parent) : QObject(parent)
{
}
void MyApp::action(){
    m_myObject = new MyObject(this);
    m_myObject->setName("myName");
    emit myObjectChanged();
}
MyObject* MyApp::myObject()
{
    return m_myObject;
}

myobject.h

#ifndef MYOBJECT_H
#define MYOBJECT_H
#include <QObject>
class MyObject : public QObject
{
    Q_OBJECT
    Q_PROPERTY(QString name READ getName)
public:
    explicit MyObject(QObject *parent = 0);
    QString getName() const;
    void setName(const QString &value);
private :
    QString name;
};
#endif // MYOBJECT_H@

myobject.cpp

#include "myobject.h"
MyObject::MyObject(QObject *parent) : QObject(parent)
{
}
QString MyObject::getName() const
{
    return name;
}
void MyObject::setName(const QString &value)
{
    name = value;
}

and main.qml

import QtQuick 2.2
import QtQuick.Window 2.1
import Test 1.0

Window {
    visible: true
    width: 360
    height: 360
    property variant myObject: MyCppObject
    MouseArea {
        anchors.fill: parent
        onClicked: {
            myLib.action()
            console.log("my object ", MyCppObject, MyCppObject.name)
        }
    }
    Text {
        text: MyCppObject.name
        anchors.centerIn: parent
    }
    onMyObjectChanged: console.log("myObjectChanged ", myObject, myObject.name)
}

p3c0

@helenebro You need to instantiate it. For eg.

MyCppObject {
   id: cppObj
}
property variant myObject: cppObj
onMyObjectChanged: console.log("myObjectChanged ", myObject, myObject.name)

helenebro

Thank you for your answer but I have find my mistake.
The property should be : property variant myObject: MyLib.monObject