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QRegExpValidator(3qt)					 QRegExpValidator(3qt)

NAME
       QRegExpValidator - Used to check a string against a

SYNOPSIS
       #include <qvalidator.h>

       Inherits QValidator.

   Public Members
       QRegExpValidator ( QObject * parent, const char * name = 0 )
       QRegExpValidator ( const QRegExp & rx, QObject * parent, const char *
	   name = 0 )
       ~QRegExpValidator ()
       virtual QValidator::State validate ( QString & input, int & pos ) const
       void setRegExp ( const QRegExp & rx )
       const QRegExp & regExp () const

DESCRIPTION
       The QRegExpValidator class is used to check a string against a regular
       expression.

       QRegExpValidator contains a regular expression, "regexp", used to
       determine whether an input string is Acceptable, Intermediate or
       Invalid.

       The regexp is treated as if it begins with the start of string
       assertion, ^, and ends with the end of string assertion $ so the match
       is against the entire input string, or from the given position if a
       start position greater than zero is given.

       For a brief introduction to Qt's regexp engine see QRegExp.

       Example of use:

	   // regexp: optional '-' followed by between 1 and 3 digits
	   QRegExp rx( "-?\\d{1,3}" );
	   QValidator* validator = new QRegExpValidator( rx, this );
	   QLineEdit* edit = new QLineEdit( this );
	   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.

	   // integers 1 to 9999
	   QRegExp rx( "[1-9]\\d{0,3}" );
	   // the validator treats the regexp as "^[1-9]\\d{0,3}$"
	   QRegExpValidator v( rx, 0 );
	   QString s;
	   int pos = 0;
	   s = "0";	v.validate( s, pos );	 // returns Invalid
	   s = "12345"; v.validate( s, pos );	 // returns Invalid
	   s = "1";	v.validate( s, pos );	 // returns Acceptable
	   rx.setPattern( "\\S+" );	       // one or more non-whitespace characters
	   v.setRegExp( rx );
	   s = "myfile.txt";  v.validate( s, pos ); // Returns Acceptable
	   s = "my file.txt"; v.validate( s, pos ); // Returns Invalid
	   // A, B or C followed by exactly five digits followed by W, X, Y or Z
	   rx.setPattern( "[A-C]\\d{5}[W-Z]" );
	   v.setRegExp( rx );
	   s = "a12345Z"; v.validate( s, pos );	       // Returns Invalid
	   s = "A12345Z"; v.validate( s, pos );	       // Returns Acceptable
	   s = "B12";	  v.validate( s, pos );	       // Returns Intermediate
	   // match most 'readme' files
	   rx.setPattern( "read\\S?me(\.(txt|asc|1st))?" );
	   rx.setCaseSensitive( FALSE );
	   v.setRegExp( rx );
	   s = "readme";      v.validate( s, pos ); // Returns Acceptable
	   s = "README.1ST";  v.validate( s, pos ); // Returns Acceptable
	   s = "read me.txt"; v.validate( s, pos ); // Returns Invalid
	   s = "readm";	      v.validate( s, pos ); // Returns Intermediate

       See also QRegExp, QIntValidator, QDoubleValidator, and Miscellaneous
       Classes.

MEMBER FUNCTION DOCUMENTATION
QRegExpValidator::QRegExpValidator ( QObject * parent, const char * name = 0 )

       Constructs a validator that accepts any string (including an empty one)
       as valid. The object's parent is parent and its name is name.

QRegExpValidator::QRegExpValidator ( const QRegExp & rx, QObject * parent,
       const char * name = 0 )
       Constructs a validator which accepts all strings that match the regular
       expression rx. The object's parent is parent and its name is name.

       The match is made against the entire string, e.g. if the regexp is [A-
       Fa-f0-9]+ it will be treated as ^[A-Fa-f0-9]+$.

QRegExpValidator::~QRegExpValidator ()
       Destroys the validator, freeing any resources allocated.

const QRegExp & QRegExpValidator::regExp () const
       Returns the regular expression used for validation.

       See also setRegExp().

void QRegExpValidator::setRegExp ( const QRegExp & rx )
       Sets the regular expression used for validation to rx.

       See also regExp().

QValidator::State QRegExpValidator::validate ( QString & input, int & pos )
       const [virtual]
       Returns Acceptable if input is matched by the regular expression for
       this validator, Intermediate if it has matched partially (i.e. could be
       a valid match if additional valid characters are added), and Invalid if
       input is not matched.

       The pos parameter is set to the length of the input parameter.

       For example, if the regular expression is \w\d\d (that is,
       word-character, digit, digit) then "A57" is Acceptable," E5" is
       Intermediate and "+9" is Invalid.

       See also QRegExp::match() and QRegExp::search().

       Reimplemented from QValidator.

SEE ALSO
       http://doc.trolltech.com/qregexpvalidator.html
       http://www.trolltech.com/faq/tech.html

COPYRIGHT
       Copyright 1992-2007 Trolltech ASA, http://www.trolltech.com.  See the
       license file included in the distribution for a complete license
       statement.

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
       (qregexpvalidator.3qt) and the Qt version (3.3.8).

Trolltech AS			2 February 2007		 QRegExpValidator(3qt)
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