getting the plain C++ implementation of a QT code

Question

I was trying to figure out how this code will loke like in plain C++ without any dependency so I was using the `moc` compiler but apparently I'm wrong. moc always returns ``` main.cpp:0: Note: No relevant classes found. No output generated. ``` the code is ``` #include #include #include class MyButton : public QWidget { public: MyButton(QWidget *parent = 0); }; MyButton::MyButton(QWidget *parent) : QWidget(parent) { QPushButton *quit = new QPushButton("Quit", this); quit->setGeometry(50, 40, 75, 30); connect(quit, SIGNAL(clicked()), qApp, SLOT(quit())); } int main(int argc, char *argv[]) { QApplication app(argc, argv); MyButton window; window.resize(250, 150); window.move(300, 300); window.setWindowTitle("button"); window.show(); return app.exec(); } ``` from http://www.zetcode.com/gui/qt4/firstprograms/ In general terms I'm interested in creating my own signal slot system using only the C++ standard library ( no boost signal, no QT, no nothing e…

Accepted Answer

Add the `Q_OBJECT` macro to the private section of your class, so `moc` converts it.

```
class MyButton : public QWidget
{
 Q_OBJECT
 public:
     MyButton(QWidget *parent = 0);
};
```

Here is what the documentation says.

getting the plain C++ implementation of a QT code

Solution

Problem