Fl_Input | +----Fl_Int_Input
The Fl_Int_Input class is a subclass of Fl_Input that only allows the user to type decimal digits (or hex numbers of the form 0xaef).
Fl_Int_Input::Fl_Int_Input(int x, int y, int w, int h, const char *label = 0)
Creates a new Fl_Int_Input widget using the given position, size, and label string. The default boxtype is FL_DOWN_BOX.
Destroys the widget and any value associated with it.