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-kmetadata.h>
  23
  24 #include <klocale.h>
  25
  26 #include <QtGui/QLabel>
  27 #include <QtGui/QGridLayout>
  28 #include <QtGui/QTextEdit>
  29
  30 #ifdef HAVE_KMETADATA
  31 #include <kmetadata/kmetadatatagwidget.h>
  32 #include <kmetadata/resourcemanager.h>
  33 #include <kmetadata/resource.h>
  34 #include <kmetadata/variant.h>
  35 #include <kmetadata/kratingwidget.h>
  36 #endif
  37
  38 // FIXME: these should be replaced by using KMetaData::File once it is available again
  39 static const char* s_nfoFile = "http://ont.semanticdesktop.org/2007/03/22/nfo#File";
  40 static const char* s_nfoFileUrl = "http://ont.semanticdesktop.org/2007/03/22/nfo#fileUrl";
  41
  42
  43 bool MetaDataWidget::metaDataAvailable()
  44 {
  45 #ifdef HAVE_KMETADATA
  46     return !Nepomuk::KMetaData::ResourceManager::instance()->init();
  47 #else
  48     return false;
  49 #endif
  50 }
  51
  52
  53 class MetaDataWidget::Private
  54 {
  55 public:
  56 #ifdef HAVE_KMETADATA
  57     void loadComment(const QString& comment);
  58
  59     QMap<KUrl, Nepomuk::KMetaData::Resource> files;
  60
  61     QTextEdit* editComment;
  62     KRatingWidget* ratingWidget;
  63     Nepomuk::KMetaData::TagWidget* tagWidget;
  64 #endif
  65 };
  66
  67 #ifdef HAVE_KMETADATA
  68 void MetaDataWidget::Private::loadComment(const QString& comment)
  69 {
  70     editComment->blockSignals(true);
  71     if (comment.isEmpty()) {
  72         editComment->setFontItalic(true);
  73         editComment->setText(i18n("Click to add comment..."));
  74     } else {
  75         editComment->setFontItalic(false);
  76         editComment->setText(comment);
  77     }
  78     editComment->blockSignals(false);
  79 }
  80 #endif
  81
  82
  83 MetaDataWidget::MetaDataWidget(QWidget* parent) :
  84     QWidget(parent)
  85 {
  86 #ifdef HAVE_KMETADATA
  87     d = new Private;
  88     d->editComment = new QTextEdit(this);
  89     d->ratingWidget = new KRatingWidget(this);
  90     d->tagWidget = new Nepomuk::KMetaData::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(i18n("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(i18n("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_KMETADATA
 132     // FIXME: replace with KMetaData::File once we have it again
 133     d->files.clear();
 134     bool first = true;
 135     QList<Nepomuk::KMetaData::Resource> fileRes;
 136     Q_FOREACH( KUrl url, urls ) {
 137         Nepomuk::KMetaData::Resource file( url.url(), s_nfoFile );
 138 //    file.setLocation(url.url());
 139         d->files.insert( url, file );
 140         fileRes.append( file );
 141
 142        if ( !first &&
 143             d->ratingWidget->rating() != file.rating() ) {
 144            d->ratingWidget->setRating( 0 ); // reset rating
 145        }
 146        else if ( first ) {
 147            d->ratingWidget->setRating( file.rating() );
 148        }
 149
 150        if ( !first &&
 151             d->editComment->toPlainText() != file.description() ) {
 152            d->loadComment( QString() );
 153        }
 154        else if ( first ) {
 155            d->loadComment( file.description() );
 156        }
 157        first = false;
 158     }
 159     d->tagWidget->setTaggedResources(fileRes);
 160 #endif
 161 }
 162
 163
 164 void MetaDataWidget::slotCommentChanged()
 165 {
 166 #ifdef HAVE_KMETADATA
 167     for ( QMap<KUrl, Nepomuk::KMetaData::Resource>::iterator it = d->files.begin();
 168           it != d->files.end(); ++it ) {
 169         it.value().setDescription(d->editComment->toPlainText());
 170     }
 171 #endif
 172 }
 173
 174
 175 void MetaDataWidget::slotRatingChanged(unsigned int rating)
 176 {
 177 #ifdef HAVE_KMETADATA
 178     for ( QMap<KUrl, Nepomuk::KMetaData::Resource>::iterator it = d->files.begin();
 179           it != d->files.end(); ++it ) {
 180         it.value().setRating(rating);
 181     }
 182 #endif
 183 }
 184
 185
 186 bool MetaDataWidget::eventFilter(QObject* obj, QEvent* event)
 187 {
 188 #ifdef HAVE_KMETADATA
 189     if (obj == d->editComment->viewport() || obj == d->editComment) {
 190         if (event->type() == QEvent::FocusOut) {
 191             // make sure the info text is displayed again
 192             d->loadComment(d->editComment->toPlainText());
 193         } else if (event->type() == QEvent::FocusIn) {
 194             d->editComment->setFontItalic(false);
 195             if (!d->files.isEmpty() && d->files.begin().value().description().isEmpty()) {
 196                 d->editComment->setText(QString());
 197             }
 198         }
 199     }
 200 #endif
 201
 202     return QWidget::eventFilter(obj, event);
 203 }
 204
 205 #include "metadatawidget.moc"