Method CustTabButton

src/uicmd.cc:103–104

                      // active one (the highest numbered gets focus).
public:
   CustTabButton (int x,int y,int w,int h, const char* label = 0) :
      Fl_Button (x,y,w,h,label) { ui_ = NULL; focus_num_ = 0; };
   void ui(UI *pui) { ui_ = pui; }
   UI *ui(void) { return ui_; }
   void focus_num(uint_t fn) { focus_num_ = fn; }