src/metadatawidget.cpp

   1 /***************************************************************************
   2  *   Copyright (C) 2007 by Sebastian Trueg <trueg@kde.org>                 *
   3  *                                                                         *
   4  *   This program is free software; you can redistribute it and/or modify  *
   5  *   it under the terms of the GNU General Public License as published by  *
   6  *   the Free Software Foundation; either version 2 of the License, or     *
   7  *   (at your option) any later version.                                   *
   8  *                                                                         *
   9  *   This program 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         *
  12  *   GNU General Public License for more details.                          *
  13  *                                                                         *
  14  *   You should have received a copy of the GNU General Public License     *
  15  *   along with this program; if not, write to the                         *
  16  *   Free Software Foundation, Inc.,                                       *
  17  *   51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA            *
  18  ***************************************************************************/
  19
  20 #include "metadatawidget.h"
  21
  22 #include <config-nepomuk.h>
  23
  24 #include <klocale.h>
  25
  26 #include <QtCore/QEvent>
  27 #include <QtGui/QLabel>
  28 #include <QtGui/QGridLayout>
  29 #include <QtGui/QTextEdit>
  30
  31 #ifdef HAVE_NEPOMUK
  32 #include <nepomuk/kmetadatatagwidget.h>
  33 #include <nepomuk/resourcemanager.h>
  34 #include <nepomuk/resource.h>
  35 #include <nepomuk/variant.h>
  36 #include <nepomuk/kratingwidget.h>
  37 #include <nepomuk/global.h>
  38 #include <Soprano/Vocabulary/Xesam>
  39 #endif
  40
  41
  42 bool MetaDataWidget::metaDataAvailable()
  43 {
  44 #ifdef HAVE_NEPOMUK
  45     return !Nepomuk::ResourceManager::instance()->init();
  46 #else
  47     return false;
  48 #endif
  49 }
  50
  51
  52 class MetaDataWidget::Private
  53 {
  54 public:
  55 #ifdef HAVE_NEPOMUK
  56     void loadComment(const QString& comment);
  57
  58     QMap<KUrl, Nepomuk::Resource> files;
  59
  60     QTextEdit* editComment;
  61     KRatingWidget* ratingWidget;
  62     Nepomuk::TagWidget* tagWidget;
  63 #endif
  64 };
  65
  66 #ifdef HAVE_NEPOMUK
  67 void MetaDataWidget::Private::loadComment(const QString& comment)
  68 {
  69     editComment->blockSignals(true);
  70     if (comment.isEmpty()) {
  71         editComment->setFontItalic(true);
  72         editComment->setText(i18nc("@info:tooltip", "Click to add comment..."));
  73     } else {
  74         editComment->setFontItalic(false);
  75         editComment->setText(comment);
  76     }
  77     editComment->blockSignals(false);
  78 }
  79 #endif
  80
  81
  82 MetaDataWidget::MetaDataWidget(QWidget* parent) :
  83     QWidget(parent)
  84 {
  85 #ifdef HAVE_NEPOMUK
  86     d = new Private;
  87     d->editComment = new QTextEdit(this);
  88     d->editComment->setFocusPolicy(Qt::ClickFocus);
  89     d->ratingWidget = new KRatingWidget(this);
  90     d->tagWidget = new Nepomuk::TagWidget(this);
  91     connect(d->ratingWidget, SIGNAL(ratingChanged(unsigned int)), this, SLOT(slotRatingChanged(unsigned int)));
  92     connect(d->editComment, SIGNAL(textChanged()), this, SLOT(slotCommentChanged()));
  93
  94     QVBoxLayout* lay = new QVBoxLayout(this);
  95     lay->setMargin(0);
  96     QHBoxLayout* hbox = new QHBoxLayout;
  97     hbox->addWidget(new QLabel(i18nc("@label:slider", "Rating:"), this));
  98     hbox->addStretch(1);
  99     hbox->addWidget(d->ratingWidget);
 100     lay->addLayout(hbox);
 101     lay->addWidget(d->editComment);
 102     hbox = new QHBoxLayout;
 103     hbox->addWidget(new QLabel(i18nc("@label:textbox", "Tags:"), this));
 104     hbox->addWidget(d->tagWidget, 1);
 105     lay->addLayout(hbox);
 106
 107     d->editComment->installEventFilter(this);
 108     d->editComment->viewport()->installEventFilter(this);
 109 #else
 110     d = 0;
 111 #endif
 112 }
 113
 114
 115 MetaDataWidget::~MetaDataWidget()
 116 {
 117     delete d;
 118 }
 119
 120
 121 void MetaDataWidget::setFile(const KUrl& url)
 122 {
 123     KUrl::List urls;
 124     urls.append( url );
 125     setFiles( urls );
 126 }
 127
 128
 129 void MetaDataWidget::setFiles(const KUrl::List& urls)
 130 {
 131 #ifdef HAVE_NEPOMUK
 132     // FIXME #1: For 100 files MetaDataWidget::setFiles() blocks
 133     // for around 15 seconds (maybe we should delegate this to a KJob).
 134     // In the meantime we temporary just reset the widgets:
 135     d->ratingWidget->setRating( 0 );
 136     d->loadComment( QString() );
 137     return;
 138
 139     // FIXME #2: replace with KMetaData::File once we have it again
 140     d->files.clear();
 141     bool first = true;
 142     QList<Nepomuk::Resource> fileRes;
 143     Q_FOREACH( KUrl url, urls ) {
 144         Nepomuk::Resource file( url.url(), Soprano::Vocabulary::Xesam::File() );
 145 //    file.setLocation(url.url());
 146         d->files.insert( url, file );
 147         fileRes.append( file );
 148
 149        if ( !first &&
 150             d->ratingWidget->rating() != file.rating() ) {
 151            d->ratingWidget->setRating( 0 ); // reset rating
 152        }
 153        else if ( first ) {
 154            d->ratingWidget->setRating( (qint32)(file.rating()) );
 155        }
 156
 157        if ( !first &&
 158             d->editComment->toPlainText() != file.description() ) {
 159            d->loadComment( QString() );
 160        }
 161        else if ( first ) {
 162            d->loadComment( file.description() );
 163        }
 164        first = false;
 165     }
 166     d->tagWidget->setTaggedResources(fileRes);
 167 #endif
 168 }
 169
 170
 171 void MetaDataWidget::slotCommentChanged()
 172 {
 173 #ifdef HAVE_NEPOMUK
 174     for ( QMap<KUrl, Nepomuk::Resource>::iterator it = d->files.begin();
 175           it != d->files.end(); ++it ) {
 176         it.value().setDescription(d->editComment->toPlainText());
 177     }
 178 #endif
 179 }
 180
 181
 182 void MetaDataWidget::slotRatingChanged(unsigned int rating)
 183 {
 184 #ifdef HAVE_NEPOMUK
 185     for ( QMap<KUrl, Nepomuk::Resource>::iterator it = d->files.begin();
 186           it != d->files.end(); ++it ) {
 187         it.value().setRating(rating);
 188     }
 189 #endif
 190 }
 191
 192
 193 bool MetaDataWidget::eventFilter(QObject* obj, QEvent* event)
 194 {
 195 #ifdef HAVE_NEPOMUK
 196     if (obj == d->editComment->viewport() || obj == d->editComment) {
 197         if (event->type() == QEvent::FocusOut) {
 198             // make sure the info text is displayed again
 199             d->loadComment(d->editComment->toPlainText());
 200         } else if (event->type() == QEvent::FocusIn) {
 201             d->editComment->setFontItalic(false);
 202             if (!d->files.isEmpty() && d->files.begin().value().description().isEmpty()) {
 203                 d->editComment->setText(QString());
 204             }
 205         }
 206     }
 207 #endif
 208
 209     return QWidget::eventFilter(obj, event);
 210 }
 211
 212 #include "metadatawidget.moc"