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ndg/lib/lvgl/examples/widgets/textarea/lv_example_textarea_3.py

51 lines
1.4 KiB
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)