Force user to input an specific time format

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Cristian Martin
Cristian Martin 2022-8-27
编辑： dpb 2022-8-28
Hi, how can a I force users to input in a cell of a uitable a specific time format, Hh:mm, and warn trough a message for wrong inputs. Thanks!

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采纳的回答

Walter Roberson
Walter Roberson 2022-8-27
parts = regexp(INPUT, '^([01]\d|2[0-3]):[0-5]\d$');
if isempty(parts)
reject
end
This assumes that you want 24 hour clock with forced leading 0 and that you do not want to permit 24:00
  1 个评论
dpb
dpb 2022-8-27
编辑：dpb 2022-8-28
GEEZER ALERT
"...and that you do not want to permit 24:00"
Lo! so many years ago had a line of online coal analyzers running under MS-DOS on industrial PCs. The app was built on MS Professional Basic 7.1 with additional assembler for the touchscreen UI and the multichannel analyzer (it was a dual-energy gamma densitometer at heart).
The system at a particular installation began crashing at midnight with a non-trapable error -- took several months of debugging before I finally caught it out--the DATE$/TIME$ function returned 24:00:00, 24:00:01, ... at midnight for roughly 30 seconds before it rolled over to 00:00:31, 00:00:32, ...
A bunch of data-storage arrays were defined with indices by hour from 0:23 and the 24 index caused an out-of-bounds memory address that corrupted BASIC string space and when the garbage collector would run in the background, boom!

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更多回答（1 个）

dpb
dpb 2022-8-27
Only with a lot of trouble -- use a datepicker UI control instead uidatepicker
  3 个评论
显示 1更早的评论
dpb
dpb 2022-8-27
Lots of callbacks, then, examaning keystrokes...see if anybody has written anything for purpose on FEX.
Cristian Martin
Cristian Martin 2022-8-27
编辑：Cristian Martin 2022-8-27
I managed to do something with if not from cell edit callback... 😉. If there's no : input user receive a warning message

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