text: import lvgl as lv
  
  import fs_driver
  
  def event_handler(e):
      code = e.get_code()
      obj = e.get_target()
      if code == lv.EVENT.VALUE_CHANGED: 
          option = " "*10
          obj.get_selected_str(option, len(option))
          print("Selected value: %s\n" + option.strip())
  
  #
  # Roller with various alignments and larger text in the selected area
  #
  
  # A style to make the selected option larger
  style_sel =  lv.style_t()
  style_sel.init()
  
  try:
      style_sel.set_text_font(lv.font_montserrat_22)
  except:
      fs_drv = lv.fs_drv_t()
      fs_driver.fs_register(fs_drv, 'S')
      print("montserrat-22 not enabled in lv_conf.h, dynamically loading the font")
      font_montserrat_22 = lv.font_load("S:" + "../../assets/font/montserrat-22.fnt")
      style_sel.set_text_font(font_montserrat_22)
      
  opts = "\n".join(["1","2","3","4","5","6","7","8","9","10"])
  
  # A roller on the left with left aligned text, and custom width
  roller = lv.roller(lv.scr_act())
  roller.set_options(opts, lv.roller.MODE.NORMAL)
  roller.set_visible_row_count(2)
  roller.set_width(100)
  roller.add_style(style_sel, lv.PART.SELECTED)
  roller.set_style_text_align(lv.TEXT_ALIGN.LEFT, 0)
  roller.align(lv.ALIGN.LEFT_MID, 10, 0)
  roller.add_event_cb(event_handler, lv.EVENT.ALL, None)
  roller.set_selected(2, lv.ANIM.OFF)
  
  # A roller on the middle with center aligned text, and auto (default) width
  roller = lv.roller(lv.scr_act());
  roller.set_options(opts, lv.roller.MODE.NORMAL)
  roller.set_visible_row_count(3)
  roller.add_style(style_sel, lv.PART.SELECTED)
  roller.align(lv.ALIGN.CENTER, 0, 0)
  roller.add_event_cb(event_handler, lv.EVENT.ALL, None)
  roller.set_selected(5, lv.ANIM.OFF)
  
  # A roller on the right with right aligned text, and custom width
  roller = lv.roller(lv.scr_act());
  roller.set_options(opts, lv.roller.MODE.NORMAL)
  roller.set_visible_row_count(4)
  roller.set_width(80)
  roller.add_style(style_sel, lv.PART.SELECTED)
  roller.set_style_text_align(lv.TEXT_ALIGN.RIGHT, 0)
  roller.align(lv.ALIGN.RIGHT_MID, -10, 0)
  roller.add_event_cb(event_handler, lv.EVENT.ALL, None)
  roller.set_selected(8, lv.ANIM.OFF)
  
  