Simplify registering self written QObjects

It can be made easier to register a self written QObject type into a QScriptEngine. Below are some template functions to simplify this task. Eventually something similar can be integrated as macro or convenience function in further Qt versions.

// template QObject factory callback function
template<class T> QScriptValue scriptConstructorCallback(QScriptContext* context, QScriptEngine* engine)

{ return engine->newQObject(new T(), QScriptEngine::ScriptOwnership); }

// register given template parameter as custom type in given script engine
template<class T> void registerScriptType(QScriptEngine& engine, const QString* constructorName = 0)

{ QScriptValue constructor = engine.newFunction(scriptConstructorCallback<T>); QScriptValue value = engine.newQMetaObject(&T::staticMetaObject, constructor); engine.globalObject().setProperty((constructorName) ? *constructorName : value.toQMetaObject()->className(), value); }

...

class MyType : public QObject

{ ... }

;

// register custom type
QScriptEngine engine;
registerScriptType<MyType>(engine);