text: import lvgl as lv
  
  def event_handler(evt):
      code = evt.get_code()
      obj  = evt.get_target()
  
      if code == lv.EVENT.VALUE_CHANGED :
          id = obj.get_selected_btn()
          txt = obj.get_btn_text(id)
  
          print("%s was pressed"%txt)
  
  btnm_map = ["1", "2", "3", "4", "5", "\n",
              "6", "7", "8", "9", "0", "\n",
              "Action1", "Action2", ""]
  
  btnm1 = lv.btnmatrix(lv.scr_act())
  btnm1.set_map(btnm_map)
  btnm1.set_btn_width(10, 2)        # Make "Action1" twice as wide as "Action2"
  btnm1.set_btn_ctrl(10, lv.btnmatrix.CTRL.CHECKABLE)
  btnm1.set_btn_ctrl(11, lv.btnmatrix.CTRL.CHECKED)
  btnm1.align(lv.ALIGN.CENTER, 0, 0)
  btnm1.add_event_cb(event_handler, lv.EVENT.ALL, None)
  
  
  #endif
  