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QIntValidator Class Reference
^{[QtGui module]}

The QIntValidator class provides a validator that ensures a string contains a valid integer within a specified range. More...

Inherits QValidator.

Methods

• __init__ (self, QObject parent = None)
• __init__ (self, int bottom, int top, QObject parent)
• int bottom (self)
• QString input fixup (self, QString input)
• fixup (self, QString input)
• setBottom (self, int)
• setRange (self, int bottom, int top)
• setTop (self, int)
• int top (self)
• (QValidator.State, QString, int) validate (self, QString, int)
• (QValidator.State, int) validate (self, QString, int)

 QValidator *validator = new QIntValidator(100, 999, this);
 QLineEdit *edit = new QLineEdit(this);

 // the edit lineedit will only accept integers between 100 and 999
 edit->setValidator(validator);

Below we present some examples of validators. In practice they would normally be associated with a widget as in the example above.

 QString str;
 int pos = 0;
 QIntValidator v(100, 900, this);

 str = "1";
 v.validate(str, pos);     // returns Intermediate
 str = "012";
 v.validate(str, pos);     // returns Intermediate

 str = "123";
 v.validate(str, pos);     // returns Acceptable
 str = "678";
 v.validate(str, pos);     // returns Acceptable

 str = "999";
 v.validate(str, pos);    // returns Intermediate

 str = "1234";
 v.validate(str, pos);     // returns Invalid
 str = "-123";
 v.validate(str, pos);     // returns Invalid
 str = "abc";
 v.validate(str, pos);     // returns Invalid
 str = "12cm";
 v.validate(str, pos);     // returns Invalid

Notice that the value 999 returns Intermediate. Values consisting of a number of digits equal to or less than the max value are considered intermediate. This is intended because the digit that prevents a number to be in range is not necessarily the last digit typed. This also means that an intermediate number can have leading zeros.

The minimum and maximum values are set in one call with setRange(), or individually with setBottom() and setTop().

QIntValidator uses its locale() to interpret the number. For example, in Arabic locales, QIntValidator will accept Arabic digits. In addition, QIntValidator is always guaranteed to accept a number formatted according to the "C" locale.

Method Documentation

QIntValidator.__init__ (self, QObject parent = None)

The parent argument, if not None, causes self to be owned by Qt instead of PyQt.

Constructs a validator with a parent object that accepts all integers.

QIntValidator.__init__ (self, int bottom, int top, QObject parent)

The parent argument, if not None, causes self to be owned by Qt instead of PyQt.

Constructs a validator with a parent, that accepts integers from minimum to maximum inclusive.

int QIntValidator.bottom (self)

QString input QIntValidator.fixup (self, QString input)

Reimplemented from QValidator.fixup().

QIntValidator.fixup (self, QString input)

QIntValidator.setBottom (self, int)

QIntValidator.setRange (self, int bottom, int top)

Sets the range of the validator to only accept integers between bottom and top inclusive.

QIntValidator.setTop (self, int)

int QIntValidator.top (self)

(QValidator.State, QString, int) QIntValidator.validate (self, QString, int)

Reimplemented from QValidator.validate().

Returns Acceptable if the input is an integer within the valid range, Intermediate if the input is a prefix of an integer in the valid range, and Invalid otherwise.

If the valid range consists of just positive integers (e.g., 32 to 100) and input is a negative integer, then Invalid is returned. (On the other hand, if the range consists of negative integers (e.g., -100 to -32) and input is a positive integer, then Intermediate is returned, because the user might be just about to type the minus (especially for right-to-left languages).

 int pos = 0;

 s = "abc";
 v.validate(s, pos);    // returns Invalid

 s = "5";
 v.validate(s, pos);    // returns Intermediate

 s = "50";
 v.validate(s, pos);    // returns Acceptable

By default, the pos parameter is not used by this validator.

(QValidator.State, int) QIntValidator.validate (self, QString, int)