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tdeio/tdefile

tdefilefiltercombo.cpp
00001 /* This file is part of the KDE libraries
00002     Copyright (C) Stephan Kulow <coolo@kde.org>
00003 
00004     This library is free software; you can redistribute it and/or
00005     modify it under the terms of the GNU Library General Public
00006     License as published by the Free Software Foundation; either
00007     version 2 of the License, or (at your option) any later version.
00008 
00009     This library is distributed in the hope that it will be useful,
00010     but WITHOUT ANY WARRANTY; without even the implied warranty of
00011     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00012     Library General Public License for more details.
00013 
00014     You should have received a copy of the GNU Library General Public License
00015     along with this library; see the file COPYING.LIB.  If not, write to
00016     the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
00017     Boston, MA 02110-1301, USA.
00018 */
00019 
00020 #include <tdelocale.h>
00021 #include <kdebug.h>
00022 #include <kstaticdeleter.h>
00023 #include <config-tdefile.h>
00024 
00025 #include "tdefilefiltercombo.h"
00026 
00027 class KFileFilterCombo::KFileFilterComboPrivate
00028 {
00029 public:
00030     KFileFilterComboPrivate() {
00031         hasAllSupportedFiles = false;
00032         defaultFilter = i18n("*|All Files");
00033         isMimeFilter = false;
00034     }
00035 
00036     // when we have more than 3 mimefilters and no default-filter,
00037     // we don't show the comments of all mimefilters in one line,
00038     // instead we show "All supported files". We have to translate
00039     // that back to the list of mimefilters in currentFilter() tho.
00040     bool hasAllSupportedFiles;
00041     // true when setMimeFilter was called
00042     bool isMimeFilter;
00043     TQString lastFilter;
00044     TQString defaultFilter;
00045 };
00046 
00047 KFileFilterCombo::KFileFilterCombo( TQWidget *parent, const char *name)
00048     : KComboBox(true, parent, name), d( new KFileFilterComboPrivate )
00049 {
00050     setTrapReturnKey( true );
00051     setInsertionPolicy(NoInsertion);
00052     connect( this, TQT_SIGNAL( activated( int )), this, TQT_SIGNAL( filterChanged() ));
00053     connect( this, TQT_SIGNAL( returnPressed() ), this, TQT_SIGNAL( filterChanged() ));
00054     connect( this, TQT_SIGNAL( filterChanged() ), TQT_SLOT( slotFilterChanged() ));
00055     m_allTypes = false;
00056 }
00057 
00058 KFileFilterCombo::~KFileFilterCombo()
00059 {
00060     delete d;
00061 }
00062 
00063 void KFileFilterCombo::setFilter(const TQString& filter)
00064 {
00065     clear();
00066     filters.clear();
00067     d->hasAllSupportedFiles = false;
00068 
00069     if (!filter.isEmpty()) {
00070     TQString tmp = filter;
00071     int index = tmp.find('\n');
00072     while (index > 0) {
00073         filters.append(tmp.left(index));
00074         tmp = tmp.mid(index + 1);
00075         index = tmp.find('\n');
00076     }
00077     filters.append(tmp);
00078     } 
00079     else
00080     filters.append( d->defaultFilter );
00081 
00082     TQStringList::ConstIterator it;
00083     TQStringList::ConstIterator end(filters.end());
00084     for (it = filters.begin(); it != end; ++it) {
00085     int tab = (*it).find('|');
00086     insertItem((tab < 0) ? *it :
00087            (*it).mid(tab + 1));
00088     }
00089 
00090     d->lastFilter = currentText();
00091     d->isMimeFilter = false;
00092 }
00093 
00094 TQString KFileFilterCombo::currentFilter() const
00095 {
00096     TQString f = currentText();
00097     if (f == text(currentItem())) { // user didn't edit the text
00098     f = *filters.at(currentItem());
00099         if ( d->isMimeFilter || (currentItem() == 0 && d->hasAllSupportedFiles) ) {
00100             return f; // we have a mimetype as filter
00101         }
00102     }
00103 
00104     int tab = f.find('|');
00105     if (tab < 0)
00106     return f;
00107     else
00108     return f.left(tab);
00109 }
00110 
00111 void KFileFilterCombo::setCurrentFilter( const TQString& filter )
00112 {
00113     int pos = 0;
00114     for( TQStringList::ConstIterator it = filters.begin();
00115          it != filters.end();
00116          ++it, ++pos ) {
00117         if( *it == filter ) {
00118             setCurrentItem( pos );
00119             filterChanged();
00120             return;
00121         }
00122     }
00123     setCurrentText( filter );
00124     filterChanged();
00125 }
00126 
00127 void KFileFilterCombo::setMimeFilter( const TQStringList& types, 
00128                                       const TQString& defaultType )
00129 {
00130     clear();
00131     filters.clear();
00132     TQString delim = TQString::fromLatin1(", ");
00133     d->hasAllSupportedFiles = false;
00134 
00135     m_allTypes = defaultType.isEmpty() && (types.count() > 1);
00136 
00137     TQString allComments, allTypes;
00138     int i = 0;
00139     for(TQStringList::ConstIterator it = types.begin(); it != types.end(); ++it,  ++i)
00140     {
00141         if ( m_allTypes && it != types.begin() ) {
00142             allComments += delim;
00143             allTypes += ' ';
00144         }
00145 
00146     kdDebug(tdefile_area) << *it << endl;
00147         KMimeType::Ptr type = KMimeType::mimeType( *it );
00148         filters.append( type->name() );
00149         if ( m_allTypes )
00150         {
00151             allTypes += type->name();
00152             allComments += type->comment();
00153         }
00154         insertItem( type->comment() );
00155         if ( type->name() == defaultType )
00156             setCurrentItem( i );
00157     }
00158 
00159     if ( m_allTypes )
00160     {
00161         if ( i < 3 ) // show the mime-comments of at max 3 types
00162             insertItem( allComments, 0 );
00163         else {
00164             insertItem( i18n("All Supported Files"), 0 );
00165             d->hasAllSupportedFiles = true;
00166         }
00167 
00168         filters.prepend( allTypes );
00169     }
00170 
00171     d->lastFilter = currentText();
00172     d->isMimeFilter = true;
00173 }
00174 
00175 void KFileFilterCombo::slotFilterChanged()
00176 {
00177     d->lastFilter = currentText();
00178 }
00179 
00180 bool KFileFilterCombo::eventFilter( TQObject *o, TQEvent *e )
00181 {
00182     if ( TQT_BASE_OBJECT(o) == TQT_BASE_OBJECT(lineEdit()) && e->type() == TQEvent::FocusOut ) {
00183         if ( currentText() != d->lastFilter )
00184             emit filterChanged();
00185     }
00186 
00187     return KComboBox::eventFilter( o, e );
00188 }
00189 
00190 void KFileFilterCombo::setDefaultFilter( const TQString& filter )
00191 {
00192     d->defaultFilter = filter;
00193 }
00194 
00195 TQString KFileFilterCombo::defaultFilter() const
00196 {
00197     return d->defaultFilter;
00198 }
00199 
00200 void KFileFilterCombo::virtual_hook( int id, void* data )
00201 { KComboBox::virtual_hook( id, data ); }
00202 
00203 #include "tdefilefiltercombo.moc"

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