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<td align="right" valign="center"><img src="logo32.png" align="right" width="64" height="32" border="0"></td></tr></table><h1 align=center>QRegExpValidator Class Reference</h1>
<p>The QRegExpValidator class is used to check a string against a
regular expression.
<a href="#details">More...</a>
<p><tt>#include <<a href="qvalidator-h.html">qvalidator.h</a>></tt>
<p>Inherits <a href="qvalidator.html">QValidator</a>.
<p><a href="qregexpvalidator-members.html">List of all member functions.</a>
<h2>Public Members</h2>
<ul>
<li><div class=fn><a href="#QRegExpValidator"><b>QRegExpValidator</b></a> ( QObject * parent, const char * name = 0 )</div></li>
<li><div class=fn><a href="#QRegExpValidator-2"><b>QRegExpValidator</b></a> ( const QRegExp & rx, QObject * parent, const char * name = 0 )</div></li>
<li><div class=fn><a href="#~QRegExpValidator"><b>~QRegExpValidator</b></a> ()</div></li>
<li><div class=fn>virtual QValidator::State <a href="#validate"><b>validate</b></a> ( QString & input, int & pos ) const</div></li>
<li><div class=fn>void <a href="#setRegExp"><b>setRegExp</b></a> ( const QRegExp & rx )</div></li>
<li><div class=fn>const QRegExp & <a href="#regExp"><b>regExp</b></a> () const</div></li>
</ul>
<hr><a name="details"></a><h2>Detailed Description</h2>
<p> The QRegExpValidator class is used to check a string against a
<a href="qregexp.html#regular-expression">regular expression</a>.
<p>
<p> QRegExpValidator contains a regular expression, "regexp", used to
determine whether an input string is <a href="qvalidator.html#State-enum">Acceptable</a>, <a href="qvalidator.html#State-enum">Intermediate</a> or
<a href="qvalidator.html#State-enum">Invalid</a>.
<p> The regexp is treated as if it begins with the start of string
assertion, <tt>^</tt>, and ends with the end of string assertion
<tt>$</tt> so the match is against the entire input string, or from
the given position if a start position greater than zero is given.
<p> For a brief introduction to Qt's regexp engine see <a href="qregexp.html">QRegExp</a>.
<p> Example of use:
<pre>
// regexp: optional '-' followed by between 1 and 3 digits
<a href="qregexp.html">QRegExp</a> rx( "-?\\d{1,3}" );
QRegExpValidator validator( rx, 0 );
<a href="qlineedit.html">QLineEdit</a> *edit = new <a href="qlineedit.html">QLineEdit</a>( split );
edit-><a href="qlineedit.html#setValidator">setValidator</a>( &validator );
</pre>
<p> Below we present some examples of validators. In practice they would
normally be associated with a widget as in the example above.
<p> <pre>
// integers 1 to 9999
<a href="qregexp.html">QRegExp</a> rx( "[1-9]\\d{0,3}" );
// the validator treats the regexp as "^[1-9]\\d{0,3}$"
QRegExpValidator v( rx, 0 );
<a href="qstring.html">QString</a> s;
s = "0"; v.<a href="#validate">validate</a>( s, 0 ); // returns Invalid
s = "12345"; v.<a href="#validate">validate</a>( s, 0 ); // returns Invalid
s = "1"; v.<a href="#validate">validate</a>( s, 0 ); // returns Acceptable
rx.<a href="qregexp.html#setPattern">setPattern</a>( "\\S+" ); // one or more non-whitespace characters
v.<a href="#setRegExp">setRegExp</a>( rx );
s = "myfile.txt"; v.<a href="#validate">validate</a>( s, 0 ); // Returns Acceptable
s = "my file.txt"; v.<a href="#validate">validate</a>( s, 0 ); // Returns Invalid
// A, B or C followed by exactly five digits followed by W, X, Y or Z
rx.<a href="qregexp.html#setPattern">setPattern</a>( "[A-C]\\d{5}[W-Z]" );
v.<a href="#setRegExp">setRegExp</a>( rx );
s = "a12345Z"; v.<a href="#validate">validate</a>( s, 0 ); // Returns Invalid
s = "A12345Z"; v.<a href="#validate">validate</a>( s, 0 ); // Returns Acceptable
s = "B12"; v.<a href="#validate">validate</a>( s, 0 ); // Returns Intermediate
// match most 'readme' files
rx.<a href="qregexp.html#setPattern">setPattern</a>( "read\\S?me(\.(txt|asc|1st))?" );
rx.<a href="qregexp.html#setCaseSensitive">setCaseSensitive</a>( FALSE );
v.<a href="#setRegExp">setRegExp</a>( rx );
s = "readme"; v.<a href="#validate">validate</a>( s, 0 ); // Returns Acceptable
s = "README.1ST"; v.<a href="#validate">validate</a>( s, 0 ); // Returns Acceptable
s = "read me.txt"; v.<a href="#validate">validate</a>( s, 0 ); // Returns Invalid
s = "readm"; v.<a href="#validate">validate</a>( s, 0 ); // Returns Intermediate
</pre>
<p> <p>See also <a href="qregexp.html">QRegExp</a>, <a href="qintvalidator.html">QIntValidator</a>, <a href="qdoublevalidator.html">QDoubleValidator</a> and <a href="misc.html">Miscellaneous Classes</a>.
<hr><h2>Member Function Documentation</h2>
<h3 class=fn><a name="QRegExpValidator"></a>QRegExpValidator::QRegExpValidator ( <a href="qobject.html">QObject</a> * parent, const char * name = 0 )
</h3>
Constructs a validator that accepts any string (including an
empty one) as valid. The object's parent is <em>parent</em> and its name is <em>name</em>.
<h3 class=fn><a name="QRegExpValidator-2"></a>QRegExpValidator::QRegExpValidator ( const <a href="qregexp.html">QRegExp</a> & rx, <a href="qobject.html">QObject</a> * parent, const char * name = 0 )
</h3>
Constructs a validator which accepts all strings that match the
<a href="qregexp.html#regular-expression">regular expression</a> <em>rx</em>. The object's parent is <em>parent</em> and its name is
<em>name</em>.
<p> The match is made against the entire string, e.g. if the regexp is
<b>[A-Fa-f0-9]+</b> it will be treated as <b>^[A-Fa-f0-9]+$</b>.
<h3 class=fn><a name="~QRegExpValidator"></a>QRegExpValidator::~QRegExpValidator ()
</h3>
Destroys the validator, freeing any resources allocated.
<h3 class=fn>const <a href="qregexp.html">QRegExp</a> & <a name="regExp"></a>QRegExpValidator::regExp () const
</h3>
<p> Returns the <a href="qregexp.html#regular-expression">regular expression</a> used for validation.
<p> <p>See also <a href="#setRegExp">setRegExp</a>().
<h3 class=fn>void <a name="setRegExp"></a>QRegExpValidator::setRegExp ( const <a href="qregexp.html">QRegExp</a> & rx )
</h3>
Sets the <a href="qregexp.html#regular-expression">regular expression</a> used for validation to <em>rx</em>.
<p> <p>See also <a href="#regExp">regExp</a>().
<h3 class=fn><a href="qvalidator.html#State-enum">QValidator::State</a> <a name="validate"></a>QRegExpValidator::validate ( <a href="qstring.html">QString</a> & input, int & pos ) const<tt> [virtual]</tt>
</h3>
Returns <a href="qvalidator.html#State-enum">Acceptable</a> if <em>input</em> is matched by the <a href="qregexp.html#regular-expression">regular expression</a>
for this validator, <a href="qvalidator.html#State-enum">Intermediate</a> if it has matched partially (i.e.
could be a valid match if additional valid characters are added), and
<a href="qvalidator.html#State-enum">Invalid</a> if <em>input</em> is not matched.
<p> The start position is the beginning of the string unless <em>pos</em> is
given and is > 0 in which case the regexp is matched from <em>pos</em> until
the end of the string.
<p> For example, if the regular expression is
<b>\w\d\d</b> (that is, word-character, digit, digit) then
"A57" is <a href="qvalidator.html#State-enum">Acceptable</a>, "E5" is <a href="qvalidator.html#State-enum">Intermediate</a> and "+9" is <a href="qvalidator.html#State-enum">Invalid</a>.
<p> <p>See also <a href="qregexp.html#match">QRegExp::match</a>().
<p>Reimplemented from <a href="qvalidator.html#validate">QValidator</a>.
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