-----------qt-----------C++的模板的使用, ---定义一个模块类--------

转自:http://qt-project.org/forums/viewthread/14782

If we’re throwing around solutions anyway: you could even create a class template that adds this function to any widget you want, including all stock widgets. :-)

template <class T>

public IDClass<T>: public T {

public:

IDClass(int id, QWidget* parent = 0):

m_id(id),

T(parent)

{}



void setId(int newId) {m_id = newId};

int id() const {return m_id;}



private:

int m_id;

}



typedef IDClass<QLineEdit> IdLineEdit;

typedef IDClass<QPushButton> IdPushButton;

//etc.