QValidator manual validation.

Kaluss

Hi,
I got problem with manual validation of handled text.

I got situation where I take validator for QLineEdit::validator() and I want to check if my current text is passing validators conditions.

For e.g.
1)I set validator

this->edit1->setValidator(new QRegExpValidator(QRegExp("[A-Za-z]{5}"),this));//no more than 5 letter character

2)When I try to access this validator from the pointer to QlineEdit and execute QValidator::validate(text, pos(0))
for:

"a" i get QValidator::Intermediate (should be QValidator::Acceptable)
"aa" I get QValidator::Intermediate (should be QValidator::Acceptable)
"aaa" I get QValidator::Intermediate (should be QValidator::Acceptable)
"aaaa" I get QValidator::Intermediate (should be QValidator::Acceptable)
"aaaaa" I get QValidator::Invalid (should be QValidator::Acceptable)

Do I get something wrong?
How to use that validation?
If I not able to validate handled text by this method could anyone say how can I do that?

Best regards,
Tomek

Chris Kawa

{5} means "exactly 5 times" so the fist 4 strings will be partial matches (intermediate state).
to have "no more than 5" use {0,5}.

As for the last case - it returns Acceptableto me as expected. Can you show the code that calls validate()? Also what is text and pos(0)?

As a side note - you should switch to QRegularExpressionValidator if possible. It uses the recommended, Perl compatible, replacement of QRegExp - QRegularExpression.

Kaluss

Hi,
You are completely right. I was wrong with assumption that {5} means no more than five.

Text is some text. pos(0) means that I put there 0 value, but do You maybe know whats that parameter really do?

Best regards,
Tomek

Chris Kawa

@Kaluss said:

but do You maybe know whats that parameter really do?

It's suppose to be "cursor position", but in case of regexp validator it's really a useless parameter to satisfy the interface of QValidator. It gets set to the length of the string if the regexp validator doesn't find a match.