QIntValidator

NAME

QIntValidator - Validator which ensures that a string contains a valid integer within a specified range

SYNOPSIS

Inherits QValidator.

Public Members

<li class=fn>QIntValidator ( QObject * parent, const char * name = 0 ) <li class=fn>QIntValidator ( int minimum, int maximum, QObject * parent, const char * name = 0 ) <li class=fn>~QIntValidator () <li class=fn>virtual QValidator::State validate ( QString & input, int & ) const <li class=fn>void setBottom ( int ) <li class=fn>void setTop ( int ) <li class=fn>virtual void setRange ( int bottom, int top ) <li class=fn>int bottom () const <li class=fn>int top () const

Properties

<li class=fn>int bottom - the validator's lowest acceptable value <li class=fn>int top - the validator's highest acceptable value

DESCRIPTION

The QIntValidator class provides a validator which ensures that 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().

See also QDoubleValidator, QRegExpValidator, and Miscellaneous Classes.

MEMBER FUNCTION DOCUMENTATION

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

Constructs a validator called name with parent parent, that accepts all integers.

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

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

QIntValidator::~QIntValidator ()

Destroys the validator, freeing any resources allocated.

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 bottom, int top ) [virtual]

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

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]

Returns Acceptable if the input is an integer within the valid range, Intermediate if the input is an integer outside the valid range and Invalid if the input is not an integer.

Note: If the valid range consists of just positive integers (e.g. 0 - 100) and input is a negative integer then Invalid is returned.



    int pos = 0;


    s = "35";


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




    s = "105";


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




    s = "abc";


    v.validate( s, pos ); // 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().

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().

COPYRIGHT

AUTHOR

Generated automatically from the source code.

BUGS

If you find a bug in Qt, please report it as described in http://doc.trolltech.com/bughowto.html. Good bug reports help us to help you. Thank you. The definitive Qt documentation is provided in HTML format; it is located at $QTDIR/doc/html and can be read using Qt Assistant or with a web browser. This man page is provided as a convenience for those users who prefer man pages, although this format is not officially supported by Trolltech. If you find errors in this manual page, please report them to qt-bugs@trolltech.com. Please include the name of the manual page (qintvalidator.3qt) and the Qt version (3.3.3).