QIntValidator Class Reference

Detailed Description

The validate() function returns Acceptable, Intermediate or Invalid. Acceptable means that the string is a valid integer within the specified range. Intermediate means that the string is a valid integer but is not within the specified range. Invalid means that the string is not a valid integer.

Example of use:

    QIntValidator v( 0, 100, this );
    QLineEdit* edit = new QLineEdit( this );

    // the edit lineedit will only accept integers between 0 and 100
    edit->setValidator( &v );
    

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

    QString s;
    QIntValidator v( 0, 100, this );

    s = "10";
    v.validate( s, 0 ); // returns Acceptable
    s = "35";
    v.validate( s, 0 ); // returns Acceptable

    s = "105";
    v.validate( s, 0 ); // returns Intermediate

    s = "-763";
    v.validate( s, 0 ); // returns Invalid
    s = "abc";
    v.validate( s, 0 ); // returns Invalid
    s = "12v";
    v.validate( s, 0 ); // returns Invalid
    

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

See also QDoubleValidator, QRegExpValidator and Miscellaneous Classes.

Member Function Documentation

QIntValidator::QIntValidator ( QObject * parent, const char * name = 0 )

QIntValidator::QIntValidator ( int minimum, int maximum, QObject * parent, const char * name = 0 )

QIntValidator::~QIntValidator ()

int QIntValidator::bottom () const

Returns the validator's lowest acceptable value. See the "bottom" property for details.

void QIntValidator::setBottom ( int )

Sets the validator's lowest acceptable value. See the "bottom" property for details.

void QIntValidator::setRange ( int minimum, int maximum ) [virtual]

void QIntValidator::setTop ( int )

Sets the validator's highest acceptable value. See the "top" property for details.

int QIntValidator::top () const

Returns the validator's highest acceptable value. See the "top" property for details.

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

    s = "35";
    v.validate( s, 0 ); // returns Acceptable

    s = "105";
    v.validate( s, 0 ); // returns Intermediate

    s = "abc";
    v.validate( s, 0 ); // returns Invalid
    

Reimplemented from QValidator.

Property Documentation

int bottom

This property holds the validator's lowest acceptable value.

Set this property's value with setBottom() and get this property's value with bottom().

See also setRange().

int top

This property holds the validator's highest acceptable value.

Set this property's value with setTop() and get this property's value with top().

See also setRange().

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