Can't get the QRegExp I need

[roseicollis]

Hi! I'm trying to get a RegExp to validate the info of a lineedit which accepts 3 numbers followed by DG and then 4 numbers more and a fifth optional.
For example, valid will be: 123DG1234 or 111DG2222
Invalid ones would be: 111DG or 111DDD or 111 or 111DG222

I have the next but when I try to write, I cant. I doesn't let me write a number or letter or anything. I tried using other RegExp I have for other LineEdits and it works fine so I suppose thta the problem is in the setPattern.

QRegExp rx9;
    rx9.setPattern("[1-9]\\d{3}][DG]\\d{4,5}");
    QValidator *validator9 = new QRegExpValidator(rx9, this);
    myLineEdit->setValidator(validator9);

QRegExp rx9;
    rx9.setPattern("[1-9]\\d{3}][DG]\\d{4,5}");
    QValidator *validator9 = new QRegExpValidator(rx9, this);
    myLineEdit->setValidator(validator9);

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EDIT: Andif I put

rx9.setPattern("[1-9]{3}[DG][1-9]{4}");

rx9.setPattern("[1-9]{3}[DG][1-9]{4}");

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It just allows me to write 123D and that's all

Thank you so much

[yeye_olive]

There are square brackets (not always balanced) all over the pattern strings you wrote. You should re-read the documentation of QRegExp (especially the paragraph called "Introduction", which describes the syntax and semantics of the square brackets) and you will understand what is going on.

[roseicollis]

Oh I see, the brackets of DG are the problem. Thank you! I thought that it worked in other way until I re-read it

But I have still another problem, it accepts either 123DG1234 and 123DG12 which is wrong

[yeye_olive]

But I have still another problem, it accepts either 123DG1234 and 123DG12 which is wrong

Can you post a code sample reproducing the problem? If you get the pattern right, then QRegExpValidator::validate("123DG12", 0) should return QValidator::Intermediate.

[roseicollis]

Hi yeye thx for your help but Its solved now I just had to use exact match in that case only dunno why but... it works so.. Problem solved.

[jefftee]

I would recommend that you use QRegularExpression instead of QRegExp in any new code you are writing/fixing. QRegularExpression supports Perl Compatible Regular Expression (PCRE) and much better IMHO.