[Qt-interest] How to write a class derive from QObject-based class in QtScript

[cubetan]

Dear Friends,

I want to derive from a QObject-based class using QtScript.
I write a Person class derived from QObject firstly:
class Person : public QObject
{
    Q_OBJECT
    Q_PROPERTY(QString name READ name WRITE setName)
public:
    Person(const QString& name, QObject* parent=0) :
        _name(name), QObject(parent)
    {
    }

    void setName(const QString& name) { this->_name = name; }
    QString name() const { return _name; }

    Q_INVOKABLE QString toString() const {
        return QString::fromLatin1("Person: ") + _name;
    }

private:
    QString _name;
};
Q_DECLARE_METATYPE(Person*)

then create a constructor function:
static QScriptValue personConstructor(QScriptContext* ctx, QScriptEngine* engine)
{
    QString name = ctx->argument(0).toString();
    Person* person = new Person(name);
    return engine->newQObject(person);
}
QScriptValue ctor = engine->newFunction(personConstructor);

QScriptValue metaObject = engine->newQMetaObject(&Person::staticMetaObject,  ctor);

engine->globalObject().setProperty("Person", metaObject);

In javascript, I define a function:

Employee = function(name, salary) {  
    Person.call(this, name);         
    this.salary = salary;            
}

Employee.prototype = new Person('tan');
Employee.prototype.toString = function() {
    print('Employee: ' + this.salary);    
}

var e = new Employee('tan',123);

then have a error: undefined function Person.call. How can I define the call function? 

 var p = new Person('tan'); 
p instanceof Object; //return true 
p instanceof Person; //return false   why? How can I get true?



2011-08-09                         

cubetan