setValidator and setEchoMode on LineEdit erases the info bad behaviour

[roseicollis]

Hi,

I have a LineEdit for a password which has to be numeric and max. lenght is 8. Also it has to display asterisks or dots as I see it does with my code. My problem is that if I put the next code when I write the 9th digit which should not let you to, it ERASES all the lineedit and writtes it as the first one. O.o Why do I have this behaviour?

QRegExp rx212("[0-9]{0,8}");
    QValidator *validator212 = new QRegExpValidator(rx212, this);
 
// this both lines make it goes wrong
    le_Pwd->setValidator(validator212); // this line alone allows me to put 0-8 numbers, no more. This is what I want but mask with ****** 
    le_Pwd->setEchoMode(QLineEdit::Password); // this line alone allows me to show dots instead of numbers to mask the pwd.  with no limit

QRegExp rx212("[0-9]{0,8}");
    QValidator *validator212 = new QRegExpValidator(rx212, this);

// this both lines make it goes wrong
    le_Pwd->setValidator(validator212); // this line alone allows me to put 0-8 numbers, no more. This is what I want but mask with ****** 
    le_Pwd->setEchoMode(QLineEdit::Password); // this line alone allows me to show dots instead of numbers to mask the pwd.  with no limit

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Thank you!