KDEUI

kbuttongroup.cpp

00001 /*
00002     This file is part of the KDE Libraries
00003 
00004     Copyright (C) 2006 Pino Toscano <toscano.pino@tiscali.it>
00005 
00006     This library is free software; you can redistribute it and/or
00007     modify it under the terms of the GNU Library General Public
00008     License as published by the Free Software Foundation; either
00009     version 2 of the License, or (at your option) any later version.
00010 
00011     This library is distributed in the hope that it will be useful,
00012     but WITHOUT ANY WARRANTY; without even the implied warranty of
00013     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
00014     Library General Public License for more details.
00015 
00016     You should have received a copy of the GNU Library General Public License
00017     along with this library; see the file COPYING.LIB. If not, write to
00018     the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
00019     Boston, MA 02110-1301, USA.
00020 */
00021 
00022 #include "kbuttongroup.h"
00023 
00024 #include <QChildEvent>
00025 #include <QHash>
00026 #include <QAbstractButton>
00027 #include <QSignalMapper>
00028 
00029 class KButtonGroup::Private
00030 {
00031   public:
00032     Private( KButtonGroup* q )
00033       : q(q), clickedMapper(), pressedMapper(), releasedMapper(),
00034         currentId( -1 ), nextId( 0 ), wantToBeId( -1 )
00035     {
00036       connect( &clickedMapper, SIGNAL( mapped( int ) ), q, SLOT( slotClicked( int ) ) );
00037       connect( &pressedMapper, SIGNAL( mapped( int ) ), q, SIGNAL( pressed( int ) ) );
00038       connect( &releasedMapper, SIGNAL( mapped( int ) ), q, SIGNAL( released( int ) ) );
00039     }
00040 
00041     void slotClicked( int id );
00042 
00043     KButtonGroup *q;
00044     QSignalMapper clickedMapper;
00045     QSignalMapper pressedMapper;
00046     QSignalMapper releasedMapper;
00047 
00048     QHash<QObject*, int> btnMap;
00049     int currentId;
00050     int nextId;
00051     int wantToBeId;
00052 };
00053 
00054 KButtonGroup::KButtonGroup( QWidget* parent )
00055   : QGroupBox( parent ), d( new Private( this ) )
00056 {
00057 }
00058 
00059 KButtonGroup::~KButtonGroup()
00060 {
00061   delete d;
00062 }
00063 
00064 void KButtonGroup::setSelected( int id )
00065 {
00066   if ( !testAttribute( Qt::WA_WState_Polished ) )
00067   {
00068     d->wantToBeId = id;
00069     ensurePolished();
00070     return;
00071   }
00072   
00073   QHash<QObject*, int>::Iterator it = d->btnMap.begin();
00074   QHash<QObject*, int>::Iterator itEnd = d->btnMap.end();
00075   QAbstractButton* button = 0;
00076   for ( ; it != itEnd; ++it )
00077   {
00078     if ( ( it.value() == id ) && ( button = qobject_cast<QAbstractButton*>( it.key() ) ) )
00079     {
00080       button->setChecked( true );
00081       d->currentId = id;
00082       emit changed( id );
00083       d->wantToBeId = -1;
00084       return;
00085     }
00086   }
00087   // button not found, it might still show up though, eg. because of premature polishing above 
00088   d->wantToBeId = id;
00089 }
00090 
00091 int KButtonGroup::selected() const
00092 {
00093   return d->currentId;
00094 }
00095 
00096 void KButtonGroup::childEvent( QChildEvent* event )
00097 {
00098   if ( event->polished() )
00099   {
00100     QAbstractButton* button = qobject_cast<QAbstractButton*>( event->child() );
00101     if ( !d->btnMap.contains( event->child() ) && button )
00102     {
00103       connect( button, SIGNAL( clicked() ), &d->clickedMapper, SLOT( map() ) );
00104       d->clickedMapper.setMapping( button, d->nextId );
00105 
00106       connect( button, SIGNAL( pressed() ), &d->pressedMapper, SLOT( map() ) );
00107       d->pressedMapper.setMapping( button, d->nextId );
00108 
00109       connect( button, SIGNAL( released() ), &d->releasedMapper, SLOT( map() ) );
00110       d->releasedMapper.setMapping( button, d->nextId );
00111 
00112       d->btnMap[ button ] = d->nextId;
00113      
00114       if ( d->nextId == d->wantToBeId )
00115       {
00116         d->currentId = d->wantToBeId;
00117         d->wantToBeId = -1;
00118         button->setChecked( true );
00119         emit changed( d->currentId );
00120       }
00121 
00122       ++d->nextId;
00123     }
00124   }
00125   else if ( event->removed() )
00126   {
00127     QObject* obj = event->child();
00128     QHash<QObject*, int>::ConstIterator it = d->btnMap.constFind( obj );
00129     if ( it != d->btnMap.constEnd() )
00130     {
00131       d->clickedMapper.removeMappings( obj );
00132       d->pressedMapper.removeMappings( obj );
00133       d->releasedMapper.removeMappings( obj );
00134 
00135       if ( it.value() == d->currentId )
00136         d->currentId = -1;
00137 
00138       d->btnMap.remove( obj );
00139     }
00140   }
00141 
00142   // be transparent
00143   QGroupBox::childEvent( event );
00144 }
00145 
00146 int KButtonGroup::id( QAbstractButton* button ) const
00147 {
00148   QHash<QObject*, int>::ConstIterator it = d->btnMap.constFind( button );
00149   if ( it != d->btnMap.constEnd() )
00150   {
00151     return it.value();
00152   }
00153   return -1;
00154 }
00155 
00156 void KButtonGroup::Private::slotClicked( int id )
00157 {
00158   currentId = id;
00159   emit q->clicked( id );
00160   emit q->changed( id );
00161 }
00162 
00163 #include "kbuttongroup.moc"
00164
KDEUI

kbuttongroup.cpp

KDEUI

kdelibs
