src/tagcloud/resourcetaggingwidget.cpp

   1 /*
   2    This file is part of the Nepomuk KDE project.
   3    Copyright (C) 2007 Sebastian Trueg <trueg@kde.org>
   4
   5    This library is free software; you can redistribute it and/or
   6    modify it under the terms of the GNU Library General Public
   7    License version 2 as published by the Free Software Foundation.
   8
   9    This library is distributed in the hope that it will be useful,
  10    but WITHOUT ANY WARRANTY; without even the implied warranty of
  11    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12    Library General Public License for more details.
  13
  14    You should have received a copy of the GNU Library General Public License
  15    along with this library; see the file COPYING.LIB.  If not, write to
  16    the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
  17    Boston, MA 02110-1301, USA.
  18  */
  19
  20 #include "resourcetaggingwidget.h"
  21 #include "tagcloud.h"
  22 #include "taggingpopup.h"
  23 #include "../nepomukmassupdatejob.h"
  24
  25 #include <QtGui/QVBoxLayout>
  26 #include <QtGui/QContextMenuEvent>
  27 #include <QtGui/QCursor>
  28 #include <QtGui/QLabel>
  29 #include <QtCore/QSet>
  30
  31 #include <KLocale>
  32
  33 namespace Nepomuk {
  34     inline uint qHash( const Tag& res )
  35     {
  36         return qHash( res.resourceUri().toString() );
  37     }
  38 }
  39
  40
  41 class Nepomuk::ResourceTaggingWidget::Private
  42 {
  43 public:
  44     QList<Nepomuk::Resource> resources;
  45
  46     TagCloud* resourceTagCloud;
  47     TaggingPopup* popup;
  48
  49     QList<Tag> resourceTags;
  50
  51     void showTaggingPopup( const QPoint& );
  52     void _k_slotShowTaggingPopup();
  53     void _k_metadataUpdateDone();
  54     static QList<Tag> intersectTags( const QList<Resource>& );
  55
  56     ResourceTaggingWidget* q;
  57 };
  58
  59
  60 void Nepomuk::ResourceTaggingWidget::Private::showTaggingPopup( const QPoint& pos )
  61 {
  62     popup->showAllTags();
  63     resourceTags = intersectTags( resources );
  64     Q_FOREACH( const Tag &tag, resourceTags ) {
  65         popup->setTagSelected( tag, true );
  66     }
  67
  68     popup->exec( pos );
  69
  70     MassUpdateJob* job = MassUpdateJob::tagResources( resources, resourceTags );
  71     connect( job, SIGNAL( result( KJob* ) ),
  72              q, SLOT( _k_metadataUpdateDone() ) );
  73     q->setEnabled( false ); // no updates during execution
  74     job->start();
  75
  76     resourceTagCloud->showTags( resourceTags );
  77 }
  78
  79
  80 void Nepomuk::ResourceTaggingWidget::Private::_k_slotShowTaggingPopup()
  81 {
  82     showTaggingPopup( QCursor::pos() );
  83 }
  84
  85
  86 void Nepomuk::ResourceTaggingWidget::Private::_k_metadataUpdateDone()
  87 {
  88     q->setEnabled( true );
  89 }
  90
  91
  92 QList<Nepomuk::Tag> Nepomuk::ResourceTaggingWidget::Private::intersectTags( const QList<Resource>& res )
  93 {
  94     if ( res.count() == 1 ) {
  95         return res.first().tags();
  96     }
  97     else if ( !res.isEmpty() ) {
  98         // determine the tags used for all resources
  99         QSet<Tag> tags = QSet<Tag>::fromList( res.first().tags() );
 100         QList<Resource>::const_iterator it = res.begin();
 101         for ( ++it; it != res.end(); ++it ) {
 102             tags.intersect( QSet<Tag>::fromList( (*it).tags() ) );
 103         }
 104         return tags.values();
 105     }
 106     else {
 107         return QList<Tag>();
 108     }
 109 }
 110
 111
 112 Nepomuk::ResourceTaggingWidget::ResourceTaggingWidget( QWidget* parent )
 113     : QWidget( parent ),
 114       d( new Private() )
 115 {
 116     d->q = this;
 117
 118     QVBoxLayout* layout = new QVBoxLayout( this );
 119     layout->setMargin( 0 );
 120     d->resourceTagCloud = new TagCloud( this );
 121     layout->addWidget( d->resourceTagCloud );
 122     QLabel* changeTagsLabel = new QLabel( "<p align=center><a style=\"font-size:small;\" href=\"dummy\">" + i18nc( "@label", "Change Tags..." ) + "</a>", this );
 123     connect( changeTagsLabel, SIGNAL( linkActivated( const QString ) ),
 124              this, SLOT( _k_slotShowTaggingPopup() ) );
 125     layout->addWidget( changeTagsLabel );
 126
 127     // the popup tag cloud
 128     d->popup = new TaggingPopup;
 129     d->popup->setSelectionEnabled( true );
 130     d->popup->setNewTagButtonEnabled( true );
 131
 132     connect( d->popup, SIGNAL( tagToggled( const Nepomuk::Tag&, bool ) ),
 133              this, SLOT( slotTagToggled( const Nepomuk::Tag&, bool ) ) );
 134     connect( d->popup, SIGNAL( tagAdded( const Nepomuk::Tag& ) ),
 135              this, SLOT( slotTagAdded( const Nepomuk::Tag& ) ) );
 136
 137     connect( d->resourceTagCloud, SIGNAL( tagClicked( const Nepomuk::Tag& ) ),
 138              this, SIGNAL( tagClicked( const Nepomuk::Tag& ) ) );
 139 }
 140
 141
 142 Nepomuk::ResourceTaggingWidget::~ResourceTaggingWidget()
 143 {
 144     delete d->popup;
 145     delete d;
 146 }
 147
 148
 149 void Nepomuk::ResourceTaggingWidget::setResource( const Nepomuk::Resource& res )
 150 {
 151     setResources( QList<Resource>() << res );
 152 }
 153
 154
 155 void Nepomuk::ResourceTaggingWidget::setResources( const QList<Nepomuk::Resource>& resList )
 156 {
 157     d->resources = resList;
 158     d->resourceTagCloud->showTags( d->intersectTags( resList ) );
 159 }
 160
 161
 162 void Nepomuk::ResourceTaggingWidget::slotTagToggled( const Nepomuk::Tag& tag, bool enabled )
 163 {
 164     if ( enabled ) {
 165         d->resourceTags.append( tag );
 166     }
 167     else {
 168         d->resourceTags.removeAll( tag );
 169     }
 170     d->popup->hide();
 171 }
 172
 173
 174 void Nepomuk::ResourceTaggingWidget::slotTagAdded( const Nepomuk::Tag& tag )
 175 {
 176     // assign it right away
 177     d->resourceTags.append( tag );
 178 //    d->resource.addTag( tag );
 179 }
 180
 181
 182 void Nepomuk::ResourceTaggingWidget::contextMenuEvent( QContextMenuEvent* e )
 183 {
 184     d->showTaggingPopup( e->globalPos() );
 185 }
 186
 187
 188 void Nepomuk::ResourceTaggingWidget::showTagPopup( const QPoint& pos )
 189 {
 190     d->showTaggingPopup( pos );
 191 }
 192
 193 #include "resourcetaggingwidget.moc"