QDoubleValidator

[cristiano]

Hi all,

I am using the QDoubleValidator to validate a QLineEdit field that must contain 10 numerical digits, I am trying thus more without success.

QValidator *doupleValidatorTell = new QDoubleValidator(0, 1, 9, this); /* allowed to type (10 digits) */
txtTest->setValidator(doupleValidatorTell);

Cris

[wysota]

It doesn't allow to type 10 digits... It'll accept entries from 0.000000001 to 1.000000000. Is that what you want?

[cristiano]

No.

I only want that it can be typed 10 digits and nothing more for example, "4533336807"

In the case of 8 digits use the QIntValidator, thus:

QIntValidator *intValidatorNum = new QIntValidator(0, 99999999, this); /* allowed to type (8 digits) */
txtNum->setValidator(intValidatorNum);

Cris

[wysota]

So why do you use a double validator?

[cristiano]

More with QIntValidator I do not obtain uses more than 10 digits, only 9, more than what this of the error.

In case that I acrecente more 2 digits “9999999999”

QIntValidator *intValidatorNum = new QIntValidator(0, 9999999999, this);

The compiler prints the error.

"src/XForm/Form.cpp:90: error: integer constant is too large for "long" type"

[wysota]

Signed integer type can hold a maximum of ~2G on 32bit machines, unsigned can hold up to ~4G. If you need longer numbers, I suggest you validate strings (for instance with QRegExpValidator with a regexp of \d{0,10} expression.

[Methedrine]

So why do you use a double validator?


qft. QRegExpValidator sounds more like what you are looking for.

[cristiano]

Friends, now functioned !!!


QRegExp rx( "-?\\d{0,10}" ); /* allowed to type (10 digits) */
QValidator* validatorNum = new QRegExpValidator( rx, this );
txtNum->setValidator(validatorNum);

thanks,

Cris