#!/usr/bin/env python
def ta_event_cb(e):
	ta = e.get_target()
		 txt = ta.get_text()
# print(txt)
			   pos = ta.get_cursor_pos()
# print("cursor pos: ",pos)
# find position of ":" in text
					 colon_pos = txt.find(":")
# if there are more than 2 digits before the colon, remove the last one entered
							 if colon_pos == 3:
								 ta.del_char()
							 if colon_pos != -1:
# if there are more than 3 digits after the ":" remove the last one entered
									 rest = txt[colon_pos:]
									if len(rest) > 3:
													ta.del_char()

									if len(txt) < 2:
														return
										if ":" in txt:
															return
																	if  txt[0] >= '0' and txt[0] <= '9' and \
												txt[1] >= '0' and txt[1] <= '9':
												if len(txt) == 2 or txt[2] != ':' :
																				ta.set_cursor_pos(2)
																				ta.add_char(ord(':'))
#
# Automatically format text like a clock. E.g. "12:34"
# Add the ':' automatically
#
# Create the text area

																				LV_HOR_RES = lv.scr_act().get_disp().driver.hor_res
																						LV_VER_RES = lv.scr_act().get_disp().driver.ver_res

																								ta = lv.textarea(lv.scr_act())
																										ta.add_event_cb(ta_event_cb, lv.EVENT.VALUE_CHANGED, None)
																										ta.set_accepted_chars("0123456789:")
																										ta.set_max_length(5)
																										ta.set_one_line(True)
																										ta.set_text("")
																										ta.add_state(lv.STATE.FOCUSED)

# Create a keyboard
																										kb = lv.keyboard(lv.scr_act())
																												kb.set_size(LV_HOR_RES, LV_VER_RES // 2)
																														kb.set_mode(lv.keyboard.MODE.NUMBER)
																														kb.set_textarea(ta)


