Extending QML with a C++ class in a namespace

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The example code below shows how you can extend QML with a C++ class in a custom namespace.

main.cpp

#include <QtGui>
#include <QtDeclarative>

namespace MyNamespace {

class Person : public QObject
{
    Q_OBJECT
    Q_PROPERTY(QString name READ name WRITE setName)
    Q_PROPERTY(int shoeSize READ shoeSize WRITE setShoeSize)
public:
    Person() {}
    QString name() const { return m_name; }
    void setName(const QString& n) { m_name = n; }
    int shoeSize() const { return m_size; }
    void setShoeSize(int s) { m_size = s; }
private:
    QString m_name;
    int m_size;
};

} // MyNamespace

#include "main.moc"

using namespace MyNamespace;

int main(int argc, char** argv) {
    QApplication app(argc, argv);
    qmlRegisterType<Person>("People", 1, 0, "Person");
    MyNamespace::Person myObj;
    QDeclarativeView view;
    view.rootContext()->setContextProperty("rootItem", (Person *)&myObj);
    view.setSource(QUrl::fromLocalFile("main.qml"));
    view.resize(200,100);
    view.show();
    return app.exec();
}

main.qml

import QtQuick 1.0
import People 1.0

Text {
    text: myPerson.name

    Person {
        id: myPerson
        name: "Sigurd"
        shoeSize: 24
    }
}