[Qt-interest] Basic question on applying QObject principles toInterfaces

[Mandeep Sandhu]

> Can be changed into:
>
> class MyInterface
> {
> public:
>  virtual ~MyInterface() {} = 0;
>  virtual const QObject* object() const = 0;
>  virtual void someMethod() = 0;
>  virtual void mySignal() = 0; // optional
> };
>
>> class MyInterfaceImpl : public MyInterface
>> {
>>     Q_OBJECT
>> public:
>>     MyInterfaceImpl() {}
>>     ~MyInterfaceImpl() {}
>>
>>     void someMethod() {
>>         // do something
>>         emit mySignal();
>>     }
>> signals:
>>     void mySignal();
>> }
>
> Can be changed into:
>
> class MyInterfaceImpl : public QObject, public MyInterface
> {
>  Q_OBJECT
> public:
>  MyInterfaceImpl() {};
>  ~MyInterfaceImpl() {};
>  const QObject* object() const { return this; };
>  void someMethod() { emit mySignal(); };
> signals:
>  void mySignal();
> };
>
> With this scenario you could also pass in a parent QObject*:
>
>  MyInterfaceImpl(QObject* parent) : QObject(parent) {};
>
> Connects should be done using MyInterface::object() instead of MyInterface.

Hmmm....interesting solution Ben.

This does make the interface class "pure", albeit at the cost of a
little confusion to the user who would think of mySignal() as a normal
function that can be called.

Though this is not a big deal and one can always comment the interface
def nicely! :)).

Thanks,
-mandeep

>
> Hope it helps.
> Greets,
>
>
>        Ben
>
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