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QIntValidator Class Reference
[модуль QtGui]

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

 #include <QIntValidator>

Inherits QValidator.

• Список всех членов, включая унаследованные
• Поддерживаемые члены Qt 3

Свойства

• bottom : int
• top : int

• 1 свойство, унаследованное от QObject

Открытые функции

• QIntValidator ( QObject * parent )
• QIntValidator ( int minimum, int maximum, QObject * parent )
• ~QIntValidator ()
• int bottom () const
• void setBottom ( int )
• virtual void setRange ( int bottom, int top )
• void setTop ( int )
• int top () const
• virtual QValidator::State validate ( QString & input, int & pos ) const

• 4 public functions inherited from QValidator
• 29 открытых функций, унаследованных от QObject

Дополнительные унаследованные члены

• 1 открытый слот, унаследованный от QObject
• 1 сигнал, унаследованный от QObject
• 5 статических открытых членов, унаследованных от QObject
• 7 защищенных функций, унаследованных от QObject

Подробное описание

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

Example of use:

 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, 999, this);

 str = "1";
 v.validate(str, pos);     // returns Intermediate
 str = "12";
 v.validate(str, pos);     // returns Intermediate

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

 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

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.

See also QDoubleValidator, QRegExpValidator, and Line Edits Example.

Описание свойств

bottom : int

This property holds the validator's lowest acceptable value.

By default, this property's value is derived from the lowest signed integer available (typically -2147483647).

Функции доступа:

• int bottom () const
• void setBottom ( int )

See also setRange().

top : int

This property holds the validator's highest acceptable value.

By default, this property's value is derived from the highest signed integer available (typically 2147483647).

Функции доступа:

• int top () const
• void setTop ( int )

See also setRange().

Описание функций-членов

QIntValidator::QIntValidator ( QObject * parent )

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

QIntValidator::QIntValidator ( int minimum, int maximum, QObject * parent )

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

QIntValidator::~QIntValidator ()

Destroys the validator.

void QIntValidator::setRange ( int bottom, int top )   [virtual]

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

QValidator::State QIntValidator::validate ( QString & input, int & pos ) const   [virtual]

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.

Reimplemented from QValidator.