knumvalidator.cpp Source File (kdeui Library)

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# knumvalidator.cpp

    00001 /**********************************************************************
    00002 **
    00003 ** $Id: knumvalidator.cpp,v 1.10.2.1 2002/12/29 15:50:19 buis Exp $
    00004 **
    00005 ** KIntValidator, KFloatValidator:
    00006 **   Copyright (C) 1999 Glen Parker <glenebob@nwlink.com>
    00007 ** KDoubleValidator:
    00008 **   Copyright (c) 2002 Marc Mutz <mutz@kde.org>
    00009 **
    00010 ** This library is free software; you can redistribute it and/or
    00011 ** modify it under the terms of the GNU Library General Public
    00012 ** License as published by the Free Software Foundation; either
    00013 ** version 2 of the License, or (at your option) any later version.
    00014 **
    00015 ** This library is distributed in the hope that it will be useful,
    00016 ** but WITHOUT ANY WARRANTY; without even the implied warranty of
    00017 ** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
    00018 ** Library General Public License for more details.
    00019 **
    00020 ** You should have received a copy of the GNU Library General Public
    00021 ** License along with this library; if not, write to the Free
    00022 ** Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
    00023 **
    00024 *****************************************************************************/
    00025
    00026 #include <qwidget.h>
    00027 #include <qstring.h>
    00028
    00029 #include "knumvalidator.h"
    00030 #include <klocale.h>
    00031 #include <kglobal.h>
    00032 #include <kdebug.h>
    00033
    00035 //  Implementation of KIntValidator
    00036 //
    00037
    00038 KIntValidator::KIntValidator ( QWidget * parent, int base, const char * name )
    00039   : QValidator(parent, name)
    00040 {
    00041   _base = base;
    00042   if (_base < 2) _base = 2;
    00043   if (_base > 36) _base = 36;
    00044
    00045   _min = _max = 0;
    00046 }
    00047
    00048 KIntValidator::KIntValidator ( int bottom, int top, QWidget * parent, int base, const char * name )
    00049   : QValidator(parent, name)
    00050 {
    00051   _base = base;
    00052   if (_base > 36) _base = 36;
    00053
    00054   _min = bottom;
    00055   _max = top;
    00056 }
    00057
    00058 KIntValidator::~KIntValidator ()
    00059 {}
    00060
    00061 QValidator::State KIntValidator::validate ( QString &str, int & ) const
    00062 {
    00063   bool ok;
    00064   int  val = 0;
    00065   QString newStr;
    00066
    00067   newStr = str.stripWhiteSpace();
    00068   if (_base > 10)
    00069     newStr = newStr.upper();
    00070
    00071   if (newStr == QString::fromLatin1("-")) // a special case
    00072     if ((_min || _max) && _min >= 0)
    00073       ok = false;
    00074     else
    00075       return QValidator::Acceptable;
    00076   else if (newStr.length())
    00077     val = newStr.toInt(&ok, _base);
    00078   else {
    00079     val = 0;
    00080     ok = true;
    00081   }
    00082
    00083   if (! ok)
    00084     return QValidator::Invalid;
    00085
    00086   if ((! _min && ! _max) || (val >= _min && val <= _max))
    00087     return QValidator::Acceptable;
    00088
    00089   if (_max && _min >= 0 && val < 0)
    00090     return QValidator::Invalid;
    00091
    00092   return QValidator::Valid;
    00093 }
    00094
    00095 void KIntValidator::fixup ( QString &str ) const
    00096 {
    00097   int                dummy;
    00098   int                val;
    00099   QValidator::State  state;
    00100
    00101   state = validate(str, dummy);
    00102
    00103   if (state == QValidator::Invalid || state == QValidator::Acceptable)
    00104     return;
    00105
    00106   if (! _min && ! _max)
    00107     return;
    00108
    00109   val = str.toInt(0, _base);
    00110
    00111   if (val < _min) val = _min;
    00112   if (val > _max) val = _max;
    00113
    00114   str.setNum(val, _base);
    00115 }
    00116
    00117 void KIntValidator::setRange ( int bottom, int top )
    00118 {
    00119   _min = bottom;
    00120   _max = top;
    00121
    00122         if (_max < _min)
    00123                 _max = _min;
    00124 }
    00125
    00126 void KIntValidator::setBase ( int base )
    00127 {
    00128   _base = base;
    00129   if (_base < 2) _base = 2;
    00130 }
    00131
    00132 int KIntValidator::bottom () const
    00133 {
    00134   return _min;
    00135 }
    00136
    00137 int KIntValidator::top () const
    00138 {
    00139   return _max;
    00140 }
    00141
    00142 int KIntValidator::base () const
    00143 {
    00144   return _base;
    00145 }
    00146
    00147
    00149 //  Implementation of KFloatValidator
    00150 //
    00151
    00152 class KFloatValidatorPrivate
    00153 {
    00154 public:
    00155     KFloatValidatorPrivate()
    00156     {
    00157     }
    00158     ~KFloatValidatorPrivate()
    00159     {
    00160     }
    00161     bool acceptLocalizedNumbers;
    00162 };
    00163
    00164
    00165 KFloatValidator::KFloatValidator ( QWidget * parent, const char * name )
    00166   : QValidator(parent, name)
    00167 {
    00168     d = new KFloatValidatorPrivate;
    00169     d->acceptLocalizedNumbers=false;
    00170     _min = _max = 0;
    00171 }
    00172
    00173 KFloatValidator::KFloatValidator ( double bottom, double top, QWidget * parent, const char * name )
    00174   : QValidator(parent, name)
    00175 {
    00176     d = new KFloatValidatorPrivate;
    00177     d->acceptLocalizedNumbers=false;
    00178     _min = bottom;
    00179     _max = top;
    00180 }
    00181
    00182 KFloatValidator::KFloatValidator ( double bottom, double top, bool localeAware, QWidget * parent, const char * name )
    00183   : QValidator(parent, name)
    00184 {
    00185     d = new KFloatValidatorPrivate;
    00186     d->acceptLocalizedNumbers = localeAware;
    00187     _min = bottom;
    00188     _max = top;
    00189 }
    00190
    00191 KFloatValidator::~KFloatValidator ()
    00192 {
    00193      delete d;
    00194 }
    00195
    00196 void KFloatValidator::setAcceptLocalizedNumbers(bool _b)
    00197 {
    00198     d->acceptLocalizedNumbers=_b;
    00199 }
    00200
    00201 bool KFloatValidator::acceptLocalizedNumbers() const
    00202 {
    00203     return d->acceptLocalizedNumbers;
    00204 }
    00205
    00206 #include <kdebug.h>
    00207 QValidator::State KFloatValidator::validate ( QString &str, int & ) const
    00208 {
    00209   bool    ok;
    00210   double  val = 0;
    00211   QString newStr;
    00212   newStr = str.stripWhiteSpace();
    00213
    00214   if (newStr == QString::fromLatin1("-")) // a special case
    00215     if ((_min || _max) && _min >= 0)
    00216       ok = false;
    00217     else
    00218       return QValidator::Acceptable;
    00219   else if (newStr == QString::fromLatin1(".") || (d->acceptLocalizedNumbers && newStr==KGlobal::locale()->decimalSymbol())) // another special case
    00220     return QValidator::Acceptable;
    00221   else if (newStr.length())
    00222   {
    00223     val = newStr.toDouble(&ok);
    00224     if(!ok && d->acceptLocalizedNumbers)
    00225        val= KGlobal::locale()->readNumber(newStr,&ok);
    00226   }
    00227   else {
    00228     val = 0;
    00229     ok = true;
    00230   }
    00231
    00232   if (! ok)
    00233     return QValidator::Invalid;
    00234
    00235   if (( !_min && !_max) || (val >= _min && val <= _max))
    00236     return QValidator::Acceptable;
    00237
    00238   if (_max && _min >= 0 && val < 0)
    00239     return QValidator::Invalid;
    00240
    00241   if ( (_min || _max) && (val < _min || val > _max))
    00242     return QValidator::Invalid;
    00243
    00244   return QValidator::Valid;
    00245 }
    00246
    00247 void KFloatValidator::fixup ( QString &str ) const
    00248 {
    00249   int                dummy;
    00250   double             val;
    00251   QValidator::State  state;
    00252
    00253   state = validate(str, dummy);
    00254
    00255   if (state == QValidator::Invalid || state == QValidator::Acceptable)
    00256     return;
    00257
    00258   if (! _min && ! _max)
    00259     return;
    00260
    00261   val = str.toDouble();
    00262
    00263   if (val < _min) val = _min;
    00264   if (val > _max) val = _max;
    00265
    00266   str.setNum(val);
    00267 }
    00268
    00269 void KFloatValidator::setRange ( double bottom, double top )
    00270 {
    00271   _min = bottom;
    00272   _max = top;
    00273
    00274         if (_max < _min)
    00275                 _max = _min;
    00276 }
    00277
    00278 double KFloatValidator::bottom () const
    00279 {
    00280   return _min;
    00281 }
    00282
    00283 double KFloatValidator::top () const
    00284 {
    00285   return _max;
    00286 }
    00287
    00288
    00289
    00290
    00292 //  Implementation of KDoubleValidator
    00293 //
    00294
    00295 class KDoubleValidator::Private {
    00296 public:
    00297   Private( bool accept=true ) : acceptLocalizedNumbers( accept ) {}
    00298
    00299   bool acceptLocalizedNumbers;
    00300 };
    00301
    00302 KDoubleValidator::KDoubleValidator( QObject * parent, const char * name )
    00303   : QDoubleValidator( parent, name ), d( 0 )
    00304 {
    00305   d = new Private();
    00306 }
    00307
    00308 KDoubleValidator::KDoubleValidator( double bottom, double top, int decimals,
    00309                                     QObject * parent, const char * name )
    00310   : QDoubleValidator( bottom, top, decimals, parent, name ), d( 0 )
    00311 {
    00312   d = new Private();
    00313 }
    00314
    00315 KDoubleValidator::~KDoubleValidator()
    00316 {
    00317         delete d;
    00318 }
    00319
    00320 bool KDoubleValidator::acceptLocalizedNumbers() const {
    00321   return d->acceptLocalizedNumbers;
    00322 }
    00323
    00324 void KDoubleValidator::setAcceptLocalizedNumbers( bool accept ) {
    00325   d->acceptLocalizedNumbers = accept;
    00326 }
    00327
    00328 QValidator::State KDoubleValidator::validate( QString & input, int & p ) const {
    00329   QString s = input;
    00330   if ( acceptLocalizedNumbers() ) {
    00331     KLocale * l = KGlobal::locale();
    00332     // ok, we have to re-format the number to have:
    00333     // 1. decimalSymbol == '.'
    00334     // 2. negativeSign  == '-'
    00335     // 3. positiveSign  == <empty>
    00336     // 4. thousandsSeparator() == <empty> (we don't check that there
    00337     //    are exactly three decimals between each separator):
    00338     QString d = l->decimalSymbol(),
    00339             n = l->negativeSign(),
    00340             p = l->positiveSign(),
    00341             t = l->thousandsSeparator();
    00342     // first, delete p's and t's:
    00343     if ( !p.isEmpty() )
    00344       for ( int idx = s.find( p ) ; idx >= 0 ; idx = s.find( p, idx ) )
    00345         s.remove( idx, p.length() );
    00346
    00347
    00348     if ( !t.isEmpty() )
    00349       for ( int idx = s.find( t ) ; idx >= 0 ; idx = s.find( t, idx ) )
    00350         s.remove( idx, t.length() );
    00351
    00352     // then, replace the d's and n's
    00353     if ( ( !n.isEmpty() && n.find('.') != -1 ) ||
    00354          ( !d.isEmpty() && d.find('-') != -1 ) ) {
    00355       // make sure we don't replace something twice:
    00356       kdWarning() << "KDoubleValidator: decimal symbol contains '-' or "
    00357                      "negative sign contains '.' -> improve algorithm" << endl;
    00358       return Invalid;
    00359     }
    00360
    00361     if ( !d.isEmpty() && d != "." )
    00362       for ( int idx = s.find( d ) ; idx >= 0 ; idx = s.find( d, idx + 1 ) )
    00363         s.replace( idx, d.length(), ".");
    00364
    00365     if ( !n.isEmpty() && n != "-" )
    00366       for ( int idx = s.find( n ) ; idx >= 0 ; idx = s.find( n, idx + 1 ) )
    00367         s.replace( idx, n.length(), "-" );
    00368   }
    00369
    00370   return base::validate( s, p );
    00371 }
    00372
    00373 #include "knumvalidator.moc"

This file is part of the documentation for kdelibs Version 3.1.5.
Documentation copyright © 1996-2002 the KDE developers.
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