def init_mainpart(self):
     xfl.fl_pref_wingeometry(400, 300, 400, 400)
     xfl.fl_pref_winsize(400, 400)
     xfl.fl_winbackground(0, xfl.fl_get_pixel(xfl.FL_COL1))
     self.main_win = xfl.fl_winopen("Drawing")
     xfl.fl_set_event_callback(self.main_callback, 0)
 def clearit(self, pobj, data):
     self.onumb = 0
     xfl.fl_winbackground(self.main_win, xfl.fl_get_pixel(xfl.FL_COL1))
     self.redrawit()