Disable comma in QDoubleValidator

Misty River

Hi, I have a QDoubleValidator that is set on a QLineEdit and I would like to disable the comma decimal separator.. I only want the user to be able to type the dot decimal like that 1.234 and not 1,234 ...

I have set the Locale to QLocale::C on the validator but the user can still type the comma.... How can I do that ?

SGaist

Hi,

Not a direct answer but why not use a QDoubleSpinBox ?

raven-worx

@Misty-River
try this (untested):

class MyValidator : public QDoubleValidator
{

QValidator::State validate(QString & input, int & pos) const
{
   if( input.contains( QChar(',') )
         return Qvalidator::Invalid;
   return QDoubleValidator::validate(inout,pos);
}

void fixup(QString & input) const
{
     QDoubleValidator::fixup(input);
     input.remove(QChar(','), Qt::CaseInsensitive);
}
}

Devopia53

@Misty-River

The Comma is a group separate character of locale.
If not you need a comma, use the QLocale::RejectGroupSeparator option.

Something like this:

QLocale lo(QLocale::C);
lo.setNumberOptions(QLocale::RejectGroupSeparator);

auto val = new QDoubleValidator(0, 1000000, 2, this);
val->setLocale(lo);
lineEdit->setValidator(val);