qintvalidator.3qt man page

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

Synopsis

#include <qvalidator.h>

Inherits QValidator.

Public Members

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

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

~QIntValidator ()

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

void setBottom ( int )

void setTop ( int )

virtual void setRange ( int bottom, int top )

int bottom () const

int top () const

Properties

int bottom - the validator's lowest acceptable value

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.

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. 32 - 100) and input is a negative integer then Invalid is returned.

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 Valid

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().

See Also

http://doc.trolltech.com/qintvalidator.… http://www.trolltech.com/faq/tech.html

Author

Generated automatically from the source code.

Bugs

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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 (3.3.8).

Referenced By

QIntValidator.3qt(3) is an alias of qintvalidator.3qt(3).

2 February 2007 Trolltech AS