src/panels/information/informationpanel.cpp

   1 /***************************************************************************
   2  *   Copyright (C) 2006 by Peter Penz <peter.penz@gmx.at>                  *
   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 "informationpanel.h"
  21
  22 #include <config-nepomuk.h>
  23
  24 #include <kdialog.h>
  25 #include <kdirnotify.h>
  26 #include <kfileitem.h>
  27 #include <kfilemetainfo.h>
  28 #include <kfileplacesmodel.h>
  29 #include <kglobalsettings.h>
  30 #include <kio/previewjob.h>
  31 #include <kiconeffect.h>
  32 #include <kiconloader.h>
  33 #include <klocale.h>
  34 #include <kmenu.h>
  35 #include <kseparator.h>
  36
  37 #ifdef HAVE_NEPOMUK
  38 #include <Nepomuk/Resource>
  39 #include <Nepomuk/Types/Property>
  40 #include <Nepomuk/Variant>
  41 #endif
  42
  43 #include <Phonon/BackendCapabilities>
  44 #include <Phonon/MediaObject>
  45 #include <Phonon/SeekSlider>
  46
  47 #include <QEvent>
  48 #include <QInputDialog>
  49 #include <QLabel>
  50 #include <QPainter>
  51 #include <QPixmap>
  52 #include <QResizeEvent>
  53 #include <QScrollArea>
  54 #include <QTextLayout>
  55 #include <QTextLine>
  56 #include <QTimer>
  57 #include <QScrollBar>
  58 #include <QVBoxLayout>
  59
  60 #include "dolphin_informationpanelsettings.h"
  61 #include "settings/dolphinsettings.h"
  62 #include "metadatawidget.h"
  63 #include "metatextlabel.h"
  64 #include "phononwidget.h"
  65 #include "pixmapviewer.h"
  66
  67 /**
  68  * Helper function for sorting items with qSort() in
  69  * InformationPanel::contextMenu().
  70  */
  71 bool lessThan(const QAction* action1, const QAction* action2)
  72 {
  73     return action1->text() < action2->text();
  74 }
  75
  76
  77 InformationPanel::InformationPanel(QWidget* parent) :
  78     Panel(parent),
  79     m_initialized(false),
  80     m_pendingPreview(false),
  81     m_infoTimer(0),
  82     m_outdatedPreviewTimer(0),
  83     m_shownUrl(),
  84     m_urlCandidate(),
  85     m_fileItem(),
  86     m_selection(),
  87     m_nameLabel(0),
  88     m_preview(0),
  89     m_phononWidget(0),
  90     m_metaDataWidget(0),
  91     m_metaTextArea(0),
  92     m_metaTextLabel(0)
  93 {
  94 }
  95
  96 InformationPanel::~InformationPanel()
  97 {
  98 }
  99
 100 QSize InformationPanel::sizeHint() const
 101 {
 102     QSize size = Panel::sizeHint();
 103     size.setWidth(minimumSizeHint().width());
 104     return size;
 105 }
 106
 107 void InformationPanel::setUrl(const KUrl& url)
 108 {
 109     Panel::setUrl(url);
 110     if (url.isValid() && !isEqualToShownUrl(url)) {
 111         if (isVisible()) {
 112             cancelRequest();
 113             m_shownUrl = url;
 114             showItemInfo();
 115         } else {
 116             m_shownUrl = url;
 117         }
 118     }
 119 }
 120
 121 void InformationPanel::setSelection(const KFileItemList& selection)
 122 {
 123     if (!isVisible()) {
 124         return;
 125     }
 126
 127     if ((selection.count() == 0) && (m_selection.count() == 0)) {
 128         // The selection has not really changed, only the current index.
 129         // QItemSelectionModel emits a signal in this case and it is less
 130         // expensive doing the check this way instead of patching
 131         // DolphinView::emitSelectionChanged().
 132         return;
 133     }
 134
 135     m_selection = selection;
 136
 137     const int count = selection.count();
 138     if (count == 0) {
 139         if (!isEqualToShownUrl(url())) {
 140             m_shownUrl = url();
 141             showItemInfo();
 142         }
 143     } else {
 144         if ((count == 1) && !selection.first().url().isEmpty()) {
 145             m_urlCandidate = selection.first().url();
 146         }
 147         m_infoTimer->start();
 148     }
 149 }
 150
 151 void InformationPanel::requestDelayedItemInfo(const KFileItem& item)
 152 {
 153     if (!isVisible()) {
 154         return;
 155     }
 156
 157     cancelRequest();
 158
 159     m_fileItem = KFileItem();
 160     if (item.isNull()) {
 161         // The cursor is above the viewport. If files are selected,
 162         // show information regarding the selection.
 163         if (m_selection.size() > 0) {
 164             m_pendingPreview = false;
 165             m_infoTimer->start();
 166         }
 167     } else {
 168         const KUrl url = item.url();
 169         if (url.isValid() && !isEqualToShownUrl(url)) {
 170             m_urlCandidate = item.url();
 171             m_fileItem = item;
 172             m_infoTimer->start();
 173         }
 174     }
 175 }
 176
 177 void InformationPanel::showEvent(QShowEvent* event)
 178 {
 179     Panel::showEvent(event);
 180     if (!event->spontaneous()) {
 181         if (!m_initialized) {
 182             // do a delayed initialization so that no performance
 183             // penalty is given when Dolphin is started with a closed
 184             // Information Panel
 185             init();
 186         }
 187         showItemInfo();
 188     }
 189 }
 190
 191 void InformationPanel::resizeEvent(QResizeEvent* event)
 192 {
 193     if (isVisible()) {
 194         // If the text inside the name label or the info label cannot
 195         // get wrapped, then the maximum width of the label is increased
 196         // so that the width of the information panel gets increased.
 197         // To prevent this, the maximum width is adjusted to
 198         // the current width of the panel.
 199         const int maxWidth = event->size().width() - KDialog::spacingHint() * 4;
 200         m_nameLabel->setMaximumWidth(maxWidth);
 201
 202         // try to increase the preview as large as possible
 203         m_preview->setSizeHint(QSize(maxWidth, maxWidth));
 204         m_urlCandidate = m_shownUrl; // reset the URL candidate if a resizing is done
 205         m_infoTimer->start();
 206     }
 207     Panel::resizeEvent(event);
 208 }
 209
 210 bool InformationPanel::eventFilter(QObject* obj, QEvent* event)
 211 {
 212     // Check whether the size of the meta text area has changed and adjust
 213     // the fixed width in a way that no horizontal scrollbar needs to be shown.
 214     if ((obj == m_metaTextArea->viewport()) && (event->type() == QEvent::Resize)) {
 215         QResizeEvent* resizeEvent = static_cast<QResizeEvent*>(event);
 216         m_metaTextLabel->setFixedWidth(resizeEvent->size().width());
 217     }
 218     return Panel::eventFilter(obj, event);
 219 }
 220
 221 void InformationPanel::contextMenuEvent(QContextMenuEvent* event)
 222 {
 223     Panel::contextMenuEvent(event);
 224
 225 #ifdef HAVE_NEPOMUK
 226     if (showMultipleSelectionInfo()) {
 227         return;
 228     }
 229
 230     KMenu popup(this);
 231
 232     QAction* ratingAction = popup.addAction(i18nc("@action:inmenu", "Rating"));
 233     ratingAction->setCheckable(true);
 234     ratingAction->setChecked(InformationPanelSettings::showRating());
 235
 236     QAction* commentAction = popup.addAction(i18nc("@action:inmenu", "Comment"));
 237     commentAction->setCheckable(true);
 238     commentAction->setChecked(InformationPanelSettings::showComment());
 239
 240     QAction* tagsAction = popup.addAction(i18nc("@action:inmenu", "Tags"));
 241     tagsAction->setCheckable(true);
 242     tagsAction->setChecked(InformationPanelSettings::showTags());
 243
 244     KConfig config("kmetainformationrc", KConfig::NoGlobals);
 245     KConfigGroup settings = config.group("Show");
 246     initMetaInfoSettings(settings);
 247
 248     QList<QAction*> actions;
 249
 250     // Get all meta information labels that are available for
 251     // the currently shown file item and add them to the popup.
 252     Nepomuk::Resource res(fileItem().url());
 253     QHash<QUrl, Nepomuk::Variant> properties = res.properties();
 254     QHash<QUrl, Nepomuk::Variant>::const_iterator it = properties.constBegin();
 255     while (it != properties.constEnd()) {
 256         Nepomuk::Types::Property prop(it.key());
 257         const QString key = prop.label();
 258
 259         // Meta information provided by Nepomuk that is already
 260         // available from KFileItem should not be configurable.
 261         bool skip = (key == "fileExtension") ||
 262                     (key == "name") ||
 263                     (key == "sourceModified") ||
 264                     (key == "size") ||
 265                     (key == "mime type");
 266         if (!skip) {
 267             // Check whether there is already a meta information
 268             // having the same label. In this case don't show it
 269             // twice in the menu.
 270             foreach (const QAction* action, actions) {
 271                 if (action->data().toString() == key) {
 272                     skip = true;
 273                     break;
 274                 }
 275             }
 276         }
 277
 278         if (!skip) {
 279             const QString label = key; // TODO
 280             QAction* action = new QAction(label, &popup);
 281             action->setCheckable(true);
 282             action->setChecked(settings.readEntry(key, true));
 283             action->setData(key);
 284             actions.append(action);
 285         }
 286
 287         ++it;
 288     }
 289
 290     if (actions.count() > 0) {
 291         popup.addSeparator();
 292
 293         // add all items alphabetically sorted to the popup
 294         qSort(actions.begin(), actions.end(), lessThan);
 295         foreach (QAction* action, actions) {
 296             popup.addAction(action);
 297         }
 298     }
 299
 300     // Open the popup and adjust the settings for the
 301     // selected action.
 302     QAction* action = popup.exec(QCursor::pos());
 303     if (action == 0) {
 304         return;
 305     }
 306
 307     if (action == ratingAction) {
 308         // TODO
 309     } else if (action == commentAction) {
 310         // TODO
 311     } else if (action == tagsAction) {
 312         // TODO
 313     } else {
 314         settings.writeEntry(action->data().toString(), action->isChecked());
 315         settings.sync();
 316         showMetaInfo();
 317     }
 318 #endif
 319 }
 320
 321 void InformationPanel::showItemInfo()
 322 {
 323     if (!isVisible()) {
 324         return;
 325     }
 326
 327     cancelRequest();
 328
 329     if (showMultipleSelectionInfo()) {
 330         KIconLoader iconLoader;
 331         QPixmap icon = iconLoader.loadIcon("dialog-information",
 332                                            KIconLoader::NoGroup,
 333                                            KIconLoader::SizeEnormous);
 334         m_preview->setPixmap(icon);
 335         setNameLabelText(i18ncp("@info", "%1 item selected", "%1 items selected",  m_selection.count()));
 336         m_shownUrl = KUrl();
 337     } else {
 338         const KFileItem item = fileItem();
 339         const KUrl itemUrl = item.url();
 340         if (!applyPlace(itemUrl)) {
 341             // try to get a preview pixmap from the item...
 342             m_pendingPreview = true;
 343
 344             // Mark the currently shown preview as outdated. This is done
 345             // with a small delay to prevent a flickering when the next preview
 346             // can be shown within a short timeframe.
 347             m_outdatedPreviewTimer->start();
 348
 349             KIO::PreviewJob* job = KIO::filePreview(KFileItemList() << item,
 350                                                     m_preview->width(),
 351                                                     m_preview->height(),
 352                                                     0,
 353                                                     0,
 354                                                     false,
 355                                                     true);
 356
 357             connect(job, SIGNAL(gotPreview(const KFileItem&, const QPixmap&)),
 358                     this, SLOT(showPreview(const KFileItem&, const QPixmap&)));
 359             connect(job, SIGNAL(failed(const KFileItem&)),
 360                     this, SLOT(showIcon(const KFileItem&)));
 361
 362             setNameLabelText(itemUrl.fileName());
 363         }
 364     }
 365
 366     showMetaInfo();
 367 }
 368
 369 void InformationPanel::slotInfoTimeout()
 370 {
 371     m_shownUrl = m_urlCandidate;
 372     showItemInfo();
 373 }
 374
 375 void InformationPanel::markOutdatedPreview()
 376 {
 377     KIconEffect iconEffect;
 378     QPixmap disabledPixmap = iconEffect.apply(m_preview->pixmap(),
 379                                               KIconLoader::Desktop,
 380                                               KIconLoader::DisabledState);
 381     m_preview->setPixmap(disabledPixmap);
 382 }
 383
 384 void InformationPanel::showIcon(const KFileItem& item)
 385 {
 386     m_outdatedPreviewTimer->stop();
 387     m_pendingPreview = false;
 388     if (!applyPlace(item.url())) {
 389         m_preview->setPixmap(item.pixmap(KIconLoader::SizeEnormous));
 390     }
 391 }
 392
 393 void InformationPanel::showPreview(const KFileItem& item,
 394                                   const QPixmap& pixmap)
 395 {
 396     m_outdatedPreviewTimer->stop();
 397
 398     Q_UNUSED(item);
 399     if (m_pendingPreview) {
 400         m_preview->setPixmap(pixmap);
 401         m_pendingPreview = false;
 402     }
 403 }
 404
 405 void InformationPanel::slotFileRenamed(const QString& source, const QString& dest)
 406 {
 407     const KUrl sourceUrl = KUrl(source);
 408
 409     // Verify whether the renamed item is selected. If this is the case, the
 410     // selection must be updated with the renamed item.
 411     bool isSelected = false;
 412     for (int i = m_selection.size() - 1; i >= 0; --i) {
 413         if (m_selection[i].url() == sourceUrl) {
 414             m_selection.removeAt(i);
 415             isSelected = true;
 416             break;
 417         }
 418     }
 419
 420     if ((m_shownUrl == sourceUrl) || isSelected) {
 421         m_shownUrl = KUrl(dest);
 422         m_fileItem = KFileItem(KFileItem::Unknown, KFileItem::Unknown, m_shownUrl);
 423         if (isSelected) {
 424             m_selection.append(m_fileItem);
 425         }
 426         showItemInfo();
 427     }
 428 }
 429
 430 void InformationPanel::slotFilesAdded(const QString& directory)
 431 {
 432     if (m_shownUrl == KUrl(directory)) {
 433         // If the 'trash' icon changes because the trash has been emptied or got filled,
 434         // the signal filesAdded("trash:/") will be emitted.
 435         KFileItem item(KFileItem::Unknown, KFileItem::Unknown, KUrl(directory));
 436         requestDelayedItemInfo(item);
 437     }
 438 }
 439
 440 void InformationPanel::slotFilesChanged(const QStringList& files)
 441 {
 442     foreach (const QString& fileName, files) {
 443         if (m_shownUrl == KUrl(fileName)) {
 444             showItemInfo();
 445             break;
 446         }
 447     }
 448 }
 449
 450 void InformationPanel::slotFilesRemoved(const QStringList& files)
 451 {
 452     foreach (const QString& fileName, files) {
 453         if (m_shownUrl == KUrl(fileName)) {
 454             // the currently shown item has been removed, show
 455             // the parent directory as fallback
 456             reset();
 457             break;
 458         }
 459     }
 460 }
 461
 462 void InformationPanel::slotEnteredDirectory(const QString& directory)
 463 {
 464     if (m_shownUrl == KUrl(directory)) {
 465         KFileItem item(KFileItem::Unknown, KFileItem::Unknown, KUrl(directory));
 466         requestDelayedItemInfo(item);
 467     }
 468 }
 469
 470 void InformationPanel::slotLeftDirectory(const QString& directory)
 471 {
 472     if (m_shownUrl == KUrl(directory)) {
 473         // The signal 'leftDirectory' is also emitted when a media
 474         // has been unmounted. In this case no directory change will be
 475         // done in Dolphin, but the Information Panel must be updated to
 476         // indicate an invalid directory.
 477         reset();
 478     }
 479 }
 480
 481 bool InformationPanel::applyPlace(const KUrl& url)
 482 {
 483     KFilePlacesModel* placesModel = DolphinSettings::instance().placesModel();
 484     int count = placesModel->rowCount();
 485
 486     for (int i = 0; i < count; ++i) {
 487         QModelIndex index = placesModel->index(i, 0);
 488
 489         if (url.equals(placesModel->url(index), KUrl::CompareWithoutTrailingSlash)) {
 490             setNameLabelText(placesModel->text(index));
 491             m_preview->setPixmap(placesModel->icon(index).pixmap(128, 128));
 492             return true;
 493         }
 494     }
 495
 496     return false;
 497 }
 498
 499 void InformationPanel::cancelRequest()
 500 {
 501     m_infoTimer->stop();
 502 }
 503
 504 void InformationPanel::showMetaInfo()
 505 {
 506     m_metaTextLabel->clear();
 507
 508     if (showMultipleSelectionInfo()) {
 509         if (m_metaDataWidget != 0) {
 510             KUrl::List urls;
 511             foreach (const KFileItem& item, m_selection) {
 512                 urls.append(item.targetUrl());
 513             }
 514             m_metaDataWidget->setFiles(urls);
 515         }
 516
 517         quint64 totalSize = 0;
 518         foreach (const KFileItem& item, m_selection) {
 519             // Only count the size of files, not dirs to match what
 520             // DolphinViewContainer::selectionStatusBarText() does.
 521             if (!item.isDir() && !item.isLink()) {
 522                 totalSize += item.size();
 523             }
 524         }
 525         m_metaTextLabel->add(i18nc("@label", "Total size:"), KIO::convertSize(totalSize));
 526
 527         delete m_phononWidget;
 528         m_phononWidget = 0;
 529     } else {
 530         const KFileItem item = fileItem();
 531         if (item.isDir()) {
 532             m_metaTextLabel->add(i18nc("@label", "Type:"), i18nc("@label", "Folder"));
 533             m_metaTextLabel->add(i18nc("@label", "Modified:"), item.timeString());
 534         } else {
 535             m_metaTextLabel->add(i18nc("@label", "Type:"), item.mimeComment());
 536
 537             m_metaTextLabel->add(i18nc("@label", "Size:"), KIO::convertSize(item.size()));
 538             m_metaTextLabel->add(i18nc("@label", "Modified:"), item.timeString());
 539
 540 #ifdef HAVE_NEPOMUK
 541             KConfig config("kmetainformationrc", KConfig::NoGlobals);
 542             KConfigGroup settings = config.group("Show");
 543             initMetaInfoSettings(settings);
 544
 545             Nepomuk::Resource res(item.url());
 546
 547             QHash<QUrl, Nepomuk::Variant> properties = res.properties();
 548             QHash<QUrl, Nepomuk::Variant>::const_iterator it = properties.constBegin();
 549             while (it != properties.constEnd()) {
 550                 Nepomuk::Types::Property prop(it.key());
 551                 const QString label = prop.label();
 552                 if (settings.readEntry(label, true)) {
 553                     // TODO: use Nepomuk::formatValue(res, prop) if available
 554                     // instead of it.value().toString()
 555                     m_metaTextLabel->add(label, it.value().toString());
 556                 }
 557                 ++it;
 558             }
 559 #endif
 560         }
 561
 562         if (m_metaDataWidget != 0) {
 563             m_metaDataWidget->setFile(item.targetUrl());
 564         }
 565
 566         if (Phonon::BackendCapabilities::isMimeTypeAvailable(item.mimetype())) {
 567             if (m_phononWidget == 0) {
 568                 m_phononWidget = new PhononWidget(this);
 569
 570                 QVBoxLayout* vBoxLayout = qobject_cast<QVBoxLayout*>(layout());
 571                 Q_ASSERT(vBoxLayout != 0);
 572                 vBoxLayout->insertWidget(3, m_phononWidget);
 573             }
 574             m_phononWidget->setUrl(item.url());
 575         } else {
 576             delete m_phononWidget;
 577             m_phononWidget = 0;
 578         }
 579     }
 580 }
 581
 582 KFileItem InformationPanel::fileItem() const
 583 {
 584     if (!m_fileItem.isNull()) {
 585         return m_fileItem;
 586     }
 587
 588     if (!m_selection.isEmpty()) {
 589         Q_ASSERT(m_selection.count() == 1);
 590         return m_selection.first();
 591     }
 592
 593     // no item is hovered and no selection has been done: provide
 594     // an item for the directory represented by m_shownUrl
 595     KFileItem item(KFileItem::Unknown, KFileItem::Unknown, m_shownUrl);
 596     item.refresh();
 597     return item;
 598 }
 599
 600 bool InformationPanel::showMultipleSelectionInfo() const
 601 {
 602     return m_fileItem.isNull() && (m_selection.count() > 1);
 603 }
 604
 605 bool InformationPanel::isEqualToShownUrl(const KUrl& url) const
 606 {
 607     return m_shownUrl.equals(url, KUrl::CompareWithoutTrailingSlash);
 608 }
 609
 610 void InformationPanel::setNameLabelText(const QString& text)
 611 {
 612     QTextOption textOption;
 613     textOption.setWrapMode(QTextOption::WrapAtWordBoundaryOrAnywhere);
 614
 615     QTextLayout textLayout(text);
 616     textLayout.setFont(m_nameLabel->font());
 617     textLayout.setTextOption(textOption);
 618
 619     QString wrappedText;
 620     wrappedText.reserve(text.length());
 621
 622     // wrap the text to fit into the width of m_nameLabel
 623     textLayout.beginLayout();
 624     QTextLine line = textLayout.createLine();
 625     while (line.isValid()) {
 626         line.setLineWidth(m_nameLabel->width());
 627         wrappedText += text.mid(line.textStart(), line.textLength());
 628
 629         line = textLayout.createLine();
 630         if (line.isValid()) {
 631             wrappedText += QChar::LineSeparator;
 632         }
 633     }
 634     textLayout.endLayout();
 635
 636     m_nameLabel->setText(wrappedText);
 637 }
 638
 639 void InformationPanel::reset()
 640 {
 641     m_selection.clear();
 642     m_shownUrl = url();
 643     m_fileItem = KFileItem();
 644     showItemInfo();
 645 }
 646
 647 void InformationPanel::initMetaInfoSettings(KConfigGroup& group)
 648 {
 649     if (!group.readEntry("initialized", false)) {
 650         // The resource file is read the first time. Assure
 651         // that some meta information is disabled per default.
 652         group.writeEntry("fileExtension", false);
 653         group.writeEntry("url", false);
 654         group.writeEntry("sourceModified", false);
 655         group.writeEntry("parentUrl", false);
 656         group.writeEntry("size", false);
 657         group.writeEntry("mime type", false);
 658         group.writeEntry("depth", false);
 659         group.writeEntry("name", false);
 660
 661         // mark the group as initialized
 662         group.writeEntry("initialized", true);
 663     }
 664 }
 665
 666 void InformationPanel::init()
 667 {
 668     const int spacing = KDialog::spacingHint();
 669
 670     m_infoTimer = new QTimer(this);
 671     m_infoTimer->setInterval(300);
 672     m_infoTimer->setSingleShot(true);
 673     connect(m_infoTimer, SIGNAL(timeout()),
 674             this, SLOT(slotInfoTimeout()));
 675
 676     // Initialize timer for disabling an outdated preview with a small
 677     // delay. This prevents flickering if the new preview can be generated
 678     // within a very small timeframe.
 679     m_outdatedPreviewTimer = new QTimer(this);
 680     m_outdatedPreviewTimer->setInterval(300);
 681     m_outdatedPreviewTimer->setSingleShot(true);
 682     connect(m_outdatedPreviewTimer, SIGNAL(timeout()),
 683             this, SLOT(markOutdatedPreview()));
 684
 685     QVBoxLayout* layout = new QVBoxLayout;
 686     layout->setSpacing(spacing);
 687
 688     // name
 689     m_nameLabel = new QLabel(this);
 690     QFont font = m_nameLabel->font();
 691     font.setBold(true);
 692     m_nameLabel->setFont(font);
 693     m_nameLabel->setAlignment(Qt::AlignHCenter);
 694     m_nameLabel->setSizePolicy(QSizePolicy::Preferred, QSizePolicy::Fixed);
 695
 696     // preview
 697     m_preview = new PixmapViewer(this);
 698     m_preview->setMinimumWidth(KIconLoader::SizeEnormous + KIconLoader::SizeMedium);
 699     m_preview->setMinimumHeight(KIconLoader::SizeEnormous);
 700
 701     if (MetaDataWidget::metaDataAvailable()) {
 702         // rating, comment and tags
 703         m_metaDataWidget = new MetaDataWidget(this);
 704         m_metaDataWidget->setSizePolicy(QSizePolicy::Preferred, QSizePolicy::Fixed);
 705     }
 706
 707     // general meta text information
 708     m_metaTextLabel = new MetaTextLabel(this);
 709     m_metaTextLabel->setSizePolicy(QSizePolicy::Preferred, QSizePolicy::Fixed);
 710
 711     m_metaTextArea = new QScrollArea(this);
 712     m_metaTextArea->setWidget(m_metaTextLabel);
 713     m_metaTextArea->setWidgetResizable(true);
 714     m_metaTextArea->setFrameShape(QFrame::NoFrame);
 715
 716     QWidget* viewport = m_metaTextArea->viewport();
 717     viewport->installEventFilter(this);
 718
 719     QPalette palette = viewport->palette();
 720     palette.setColor(viewport->backgroundRole(), QColor(Qt::transparent));
 721     viewport->setPalette(palette);
 722
 723     layout->addWidget(m_nameLabel);
 724     layout->addWidget(new KSeparator(this));
 725     layout->addWidget(m_preview);
 726     layout->addWidget(new KSeparator(this));
 727     if (m_metaDataWidget != 0) {
 728         layout->addWidget(m_metaDataWidget);
 729         layout->addWidget(new KSeparator(this));
 730     }
 731     layout->addWidget(m_metaTextArea);
 732     setLayout(layout);
 733
 734     org::kde::KDirNotify* dirNotify = new org::kde::KDirNotify(QString(), QString(),
 735                                                                QDBusConnection::sessionBus(), this);
 736     connect(dirNotify, SIGNAL(FileRenamed(QString, QString)), SLOT(slotFileRenamed(QString, QString)));
 737     connect(dirNotify, SIGNAL(FilesAdded(QString)), SLOT(slotFilesAdded(QString)));
 738     connect(dirNotify, SIGNAL(FilesChanged(QStringList)), SLOT(slotFilesChanged(QStringList)));
 739     connect(dirNotify, SIGNAL(FilesRemoved(QStringList)), SLOT(slotFilesRemoved(QStringList)));
 740     connect(dirNotify, SIGNAL(enteredDirectory(QString)), SLOT(slotEnteredDirectory(QString)));
 741     connect(dirNotify, SIGNAL(leftDirectory(QString)), SLOT(slotLeftDirectory(QString)));
 742
 743     m_initialized = true;
 744 }
 745
 746 #include "informationpanel.moc"