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* previewAction = popup.addAction(i18nc("@action:inmenu", "Preview"));
 233     previewAction->setIcon(KIcon("view-preview"));
 234     previewAction->setCheckable(true);
 235     previewAction->setChecked(InformationPanelSettings::showPreview());
 236
 237     const bool metaDataAvailable = MetaDataWidget::metaDataAvailable();
 238
 239     QAction* ratingAction = popup.addAction(i18nc("@action:inmenu", "Rating"));
 240     ratingAction->setIcon(KIcon("rating"));
 241     ratingAction->setCheckable(true);
 242     ratingAction->setChecked(InformationPanelSettings::showRating());
 243     ratingAction->setEnabled(metaDataAvailable);
 244
 245     QAction* commentAction = popup.addAction(i18nc("@action:inmenu", "Comment"));
 246     commentAction->setIcon(KIcon("text-plain"));
 247     commentAction->setCheckable(true);
 248     commentAction->setChecked(InformationPanelSettings::showComment());
 249     commentAction->setEnabled(metaDataAvailable);
 250
 251     QAction* tagsAction = popup.addAction(i18nc("@action:inmenu", "Tags"));
 252     tagsAction->setCheckable(true);
 253     tagsAction->setChecked(InformationPanelSettings::showTags());
 254     tagsAction->setEnabled(metaDataAvailable);
 255
 256     KConfig config("kmetainformationrc", KConfig::NoGlobals);
 257     KConfigGroup settings = config.group("Show");
 258     initMetaInfoSettings(settings);
 259
 260     QList<QAction*> actions;
 261
 262     // Get all meta information labels that are available for
 263     // the currently shown file item and add them to the popup.
 264     Nepomuk::Resource res(fileItem().url());
 265     QHash<QUrl, Nepomuk::Variant> properties = res.properties();
 266     QHash<QUrl, Nepomuk::Variant>::const_iterator it = properties.constBegin();
 267     while (it != properties.constEnd()) {
 268         Nepomuk::Types::Property prop(it.key());
 269         const QString key = prop.label();
 270
 271         // Meta information provided by Nepomuk that is already
 272         // available from KFileItem should not be configurable.
 273         bool skip = (key == "fileExtension") ||
 274                     (key == "name") ||
 275                     (key == "sourceModified") ||
 276                     (key == "size") ||
 277                     (key == "mime type");
 278         if (!skip) {
 279             // Check whether there is already a meta information
 280             // having the same label. In this case don't show it
 281             // twice in the menu.
 282             foreach (const QAction* action, actions) {
 283                 if (action->data().toString() == key) {
 284                     skip = true;
 285                     break;
 286                 }
 287             }
 288         }
 289
 290         if (!skip) {
 291             const QString label = key; // TODO
 292             QAction* action = new QAction(label, &popup);
 293             action->setCheckable(true);
 294             action->setChecked(settings.readEntry(key, true));
 295             action->setData(key);
 296             actions.append(action);
 297         }
 298
 299         ++it;
 300     }
 301
 302     if (actions.count() > 0) {
 303         popup.addSeparator();
 304
 305         // add all items alphabetically sorted to the popup
 306         qSort(actions.begin(), actions.end(), lessThan);
 307         foreach (QAction* action, actions) {
 308             popup.addAction(action);
 309         }
 310     }
 311
 312     // Open the popup and adjust the settings for the
 313     // selected action.
 314     QAction* action = popup.exec(QCursor::pos());
 315     if (action == 0) {
 316         return;
 317     }
 318
 319     if (action == previewAction) {
 320         // TODO
 321     } else if (action == ratingAction) {
 322         // TODO
 323     } else if (action == commentAction) {
 324         // TODO
 325     } else if (action == tagsAction) {
 326         // TODO
 327     } else {
 328         settings.writeEntry(action->data().toString(), action->isChecked());
 329         settings.sync();
 330         showMetaInfo();
 331     }
 332 #endif
 333 }
 334
 335 void InformationPanel::showItemInfo()
 336 {
 337     if (!isVisible()) {
 338         return;
 339     }
 340
 341     cancelRequest();
 342
 343     if (showMultipleSelectionInfo()) {
 344         KIconLoader iconLoader;
 345         QPixmap icon = iconLoader.loadIcon("dialog-information",
 346                                            KIconLoader::NoGroup,
 347                                            KIconLoader::SizeEnormous);
 348         m_preview->setPixmap(icon);
 349         setNameLabelText(i18ncp("@info", "%1 item selected", "%1 items selected",  m_selection.count()));
 350         m_shownUrl = KUrl();
 351     } else {
 352         const KFileItem item = fileItem();
 353         const KUrl itemUrl = item.url();
 354         if (!applyPlace(itemUrl)) {
 355             // try to get a preview pixmap from the item...
 356             m_pendingPreview = true;
 357
 358             // Mark the currently shown preview as outdated. This is done
 359             // with a small delay to prevent a flickering when the next preview
 360             // can be shown within a short timeframe.
 361             m_outdatedPreviewTimer->start();
 362
 363             KIO::PreviewJob* job = KIO::filePreview(KFileItemList() << item,
 364                                                     m_preview->width(),
 365                                                     m_preview->height(),
 366                                                     0,
 367                                                     0,
 368                                                     false,
 369                                                     true);
 370
 371             connect(job, SIGNAL(gotPreview(const KFileItem&, const QPixmap&)),
 372                     this, SLOT(showPreview(const KFileItem&, const QPixmap&)));
 373             connect(job, SIGNAL(failed(const KFileItem&)),
 374                     this, SLOT(showIcon(const KFileItem&)));
 375
 376             setNameLabelText(itemUrl.fileName());
 377         }
 378     }
 379
 380     showMetaInfo();
 381 }
 382
 383 void InformationPanel::slotInfoTimeout()
 384 {
 385     m_shownUrl = m_urlCandidate;
 386     showItemInfo();
 387 }
 388
 389 void InformationPanel::markOutdatedPreview()
 390 {
 391     KIconEffect iconEffect;
 392     QPixmap disabledPixmap = iconEffect.apply(m_preview->pixmap(),
 393                                               KIconLoader::Desktop,
 394                                               KIconLoader::DisabledState);
 395     m_preview->setPixmap(disabledPixmap);
 396 }
 397
 398 void InformationPanel::showIcon(const KFileItem& item)
 399 {
 400     m_outdatedPreviewTimer->stop();
 401     m_pendingPreview = false;
 402     if (!applyPlace(item.url())) {
 403         m_preview->setPixmap(item.pixmap(KIconLoader::SizeEnormous));
 404     }
 405 }
 406
 407 void InformationPanel::showPreview(const KFileItem& item,
 408                                   const QPixmap& pixmap)
 409 {
 410     m_outdatedPreviewTimer->stop();
 411
 412     Q_UNUSED(item);
 413     if (m_pendingPreview) {
 414         m_preview->setPixmap(pixmap);
 415         m_pendingPreview = false;
 416     }
 417 }
 418
 419 void InformationPanel::slotFileRenamed(const QString& source, const QString& dest)
 420 {
 421     const KUrl sourceUrl = KUrl(source);
 422
 423     // Verify whether the renamed item is selected. If this is the case, the
 424     // selection must be updated with the renamed item.
 425     bool isSelected = false;
 426     for (int i = m_selection.size() - 1; i >= 0; --i) {
 427         if (m_selection[i].url() == sourceUrl) {
 428             m_selection.removeAt(i);
 429             isSelected = true;
 430             break;
 431         }
 432     }
 433
 434     if ((m_shownUrl == sourceUrl) || isSelected) {
 435         m_shownUrl = KUrl(dest);
 436         m_fileItem = KFileItem(KFileItem::Unknown, KFileItem::Unknown, m_shownUrl);
 437         if (isSelected) {
 438             m_selection.append(m_fileItem);
 439         }
 440         showItemInfo();
 441     }
 442 }
 443
 444 void InformationPanel::slotFilesAdded(const QString& directory)
 445 {
 446     if (m_shownUrl == KUrl(directory)) {
 447         // If the 'trash' icon changes because the trash has been emptied or got filled,
 448         // the signal filesAdded("trash:/") will be emitted.
 449         KFileItem item(KFileItem::Unknown, KFileItem::Unknown, KUrl(directory));
 450         requestDelayedItemInfo(item);
 451     }
 452 }
 453
 454 void InformationPanel::slotFilesChanged(const QStringList& files)
 455 {
 456     foreach (const QString& fileName, files) {
 457         if (m_shownUrl == KUrl(fileName)) {
 458             showItemInfo();
 459             break;
 460         }
 461     }
 462 }
 463
 464 void InformationPanel::slotFilesRemoved(const QStringList& files)
 465 {
 466     foreach (const QString& fileName, files) {
 467         if (m_shownUrl == KUrl(fileName)) {
 468             // the currently shown item has been removed, show
 469             // the parent directory as fallback
 470             reset();
 471             break;
 472         }
 473     }
 474 }
 475
 476 void InformationPanel::slotEnteredDirectory(const QString& directory)
 477 {
 478     if (m_shownUrl == KUrl(directory)) {
 479         KFileItem item(KFileItem::Unknown, KFileItem::Unknown, KUrl(directory));
 480         requestDelayedItemInfo(item);
 481     }
 482 }
 483
 484 void InformationPanel::slotLeftDirectory(const QString& directory)
 485 {
 486     if (m_shownUrl == KUrl(directory)) {
 487         // The signal 'leftDirectory' is also emitted when a media
 488         // has been unmounted. In this case no directory change will be
 489         // done in Dolphin, but the Information Panel must be updated to
 490         // indicate an invalid directory.
 491         reset();
 492     }
 493 }
 494
 495 bool InformationPanel::applyPlace(const KUrl& url)
 496 {
 497     KFilePlacesModel* placesModel = DolphinSettings::instance().placesModel();
 498     int count = placesModel->rowCount();
 499
 500     for (int i = 0; i < count; ++i) {
 501         QModelIndex index = placesModel->index(i, 0);
 502
 503         if (url.equals(placesModel->url(index), KUrl::CompareWithoutTrailingSlash)) {
 504             setNameLabelText(placesModel->text(index));
 505             m_preview->setPixmap(placesModel->icon(index).pixmap(128, 128));
 506             return true;
 507         }
 508     }
 509
 510     return false;
 511 }
 512
 513 void InformationPanel::cancelRequest()
 514 {
 515     m_infoTimer->stop();
 516 }
 517
 518 void InformationPanel::showMetaInfo()
 519 {
 520     m_metaTextLabel->clear();
 521
 522     if (showMultipleSelectionInfo()) {
 523         if (m_metaDataWidget != 0) {
 524             KUrl::List urls;
 525             foreach (const KFileItem& item, m_selection) {
 526                 urls.append(item.targetUrl());
 527             }
 528             m_metaDataWidget->setFiles(urls);
 529         }
 530
 531         quint64 totalSize = 0;
 532         foreach (const KFileItem& item, m_selection) {
 533             // Only count the size of files, not dirs to match what
 534             // DolphinViewContainer::selectionStatusBarText() does.
 535             if (!item.isDir() && !item.isLink()) {
 536                 totalSize += item.size();
 537             }
 538         }
 539         m_metaTextLabel->add(i18nc("@label", "Total size:"), KIO::convertSize(totalSize));
 540
 541         delete m_phononWidget;
 542         m_phononWidget = 0;
 543     } else {
 544         const KFileItem item = fileItem();
 545         if (item.isDir()) {
 546             m_metaTextLabel->add(i18nc("@label", "Type:"), i18nc("@label", "Folder"));
 547             m_metaTextLabel->add(i18nc("@label", "Modified:"), item.timeString());
 548         } else {
 549             m_metaTextLabel->add(i18nc("@label", "Type:"), item.mimeComment());
 550
 551             m_metaTextLabel->add(i18nc("@label", "Size:"), KIO::convertSize(item.size()));
 552             m_metaTextLabel->add(i18nc("@label", "Modified:"), item.timeString());
 553
 554 #ifdef HAVE_NEPOMUK
 555             KConfig config("kmetainformationrc", KConfig::NoGlobals);
 556             KConfigGroup settings = config.group("Show");
 557             initMetaInfoSettings(settings);
 558
 559             Nepomuk::Resource res(item.url());
 560
 561             QHash<QUrl, Nepomuk::Variant> properties = res.properties();
 562             QHash<QUrl, Nepomuk::Variant>::const_iterator it = properties.constBegin();
 563             while (it != properties.constEnd()) {
 564                 Nepomuk::Types::Property prop(it.key());
 565                 const QString label = prop.label();
 566                 if (settings.readEntry(label, true)) {
 567                     // TODO: use Nepomuk::formatValue(res, prop) if available
 568                     // instead of it.value().toString()
 569                     m_metaTextLabel->add(label, it.value().toString());
 570                 }
 571                 ++it;
 572             }
 573 #endif
 574         }
 575
 576         if (m_metaDataWidget != 0) {
 577             m_metaDataWidget->setFile(item.targetUrl());
 578         }
 579
 580         if (Phonon::BackendCapabilities::isMimeTypeAvailable(item.mimetype())) {
 581             if (m_phononWidget == 0) {
 582                 m_phononWidget = new PhononWidget(this);
 583
 584                 QVBoxLayout* vBoxLayout = qobject_cast<QVBoxLayout*>(layout());
 585                 Q_ASSERT(vBoxLayout != 0);
 586                 vBoxLayout->insertWidget(3, m_phononWidget);
 587             }
 588             m_phononWidget->setUrl(item.url());
 589         } else {
 590             delete m_phononWidget;
 591             m_phononWidget = 0;
 592         }
 593     }
 594 }
 595
 596 KFileItem InformationPanel::fileItem() const
 597 {
 598     if (!m_fileItem.isNull()) {
 599         return m_fileItem;
 600     }
 601
 602     if (!m_selection.isEmpty()) {
 603         Q_ASSERT(m_selection.count() == 1);
 604         return m_selection.first();
 605     }
 606
 607     // no item is hovered and no selection has been done: provide
 608     // an item for the directory represented by m_shownUrl
 609     KFileItem item(KFileItem::Unknown, KFileItem::Unknown, m_shownUrl);
 610     item.refresh();
 611     return item;
 612 }
 613
 614 bool InformationPanel::showMultipleSelectionInfo() const
 615 {
 616     return m_fileItem.isNull() && (m_selection.count() > 1);
 617 }
 618
 619 bool InformationPanel::isEqualToShownUrl(const KUrl& url) const
 620 {
 621     return m_shownUrl.equals(url, KUrl::CompareWithoutTrailingSlash);
 622 }
 623
 624 void InformationPanel::setNameLabelText(const QString& text)
 625 {
 626     QTextOption textOption;
 627     textOption.setWrapMode(QTextOption::WrapAtWordBoundaryOrAnywhere);
 628
 629     QTextLayout textLayout(text);
 630     textLayout.setFont(m_nameLabel->font());
 631     textLayout.setTextOption(textOption);
 632
 633     QString wrappedText;
 634     wrappedText.reserve(text.length());
 635
 636     // wrap the text to fit into the width of m_nameLabel
 637     textLayout.beginLayout();
 638     QTextLine line = textLayout.createLine();
 639     while (line.isValid()) {
 640         line.setLineWidth(m_nameLabel->width());
 641         wrappedText += text.mid(line.textStart(), line.textLength());
 642
 643         line = textLayout.createLine();
 644         if (line.isValid()) {
 645             wrappedText += QChar::LineSeparator;
 646         }
 647     }
 648     textLayout.endLayout();
 649
 650     m_nameLabel->setText(wrappedText);
 651 }
 652
 653 void InformationPanel::reset()
 654 {
 655     m_selection.clear();
 656     m_shownUrl = url();
 657     m_fileItem = KFileItem();
 658     showItemInfo();
 659 }
 660
 661 void InformationPanel::initMetaInfoSettings(KConfigGroup& group)
 662 {
 663     if (!group.readEntry("initialized", false)) {
 664         // The resource file is read the first time. Assure
 665         // that some meta information is disabled per default.
 666         group.writeEntry("fileExtension", false);
 667         group.writeEntry("url", false);
 668         group.writeEntry("sourceModified", false);
 669         group.writeEntry("parentUrl", false);
 670         group.writeEntry("size", false);
 671         group.writeEntry("mime type", false);
 672         group.writeEntry("depth", false);
 673         group.writeEntry("name", false);
 674
 675         // mark the group as initialized
 676         group.writeEntry("initialized", true);
 677     }
 678 }
 679
 680 void InformationPanel::init()
 681 {
 682     const int spacing = KDialog::spacingHint();
 683
 684     m_infoTimer = new QTimer(this);
 685     m_infoTimer->setInterval(300);
 686     m_infoTimer->setSingleShot(true);
 687     connect(m_infoTimer, SIGNAL(timeout()),
 688             this, SLOT(slotInfoTimeout()));
 689
 690     // Initialize timer for disabling an outdated preview with a small
 691     // delay. This prevents flickering if the new preview can be generated
 692     // within a very small timeframe.
 693     m_outdatedPreviewTimer = new QTimer(this);
 694     m_outdatedPreviewTimer->setInterval(300);
 695     m_outdatedPreviewTimer->setSingleShot(true);
 696     connect(m_outdatedPreviewTimer, SIGNAL(timeout()),
 697             this, SLOT(markOutdatedPreview()));
 698
 699     QVBoxLayout* layout = new QVBoxLayout;
 700     layout->setSpacing(spacing);
 701
 702     // name
 703     m_nameLabel = new QLabel(this);
 704     QFont font = m_nameLabel->font();
 705     font.setBold(true);
 706     m_nameLabel->setFont(font);
 707     m_nameLabel->setAlignment(Qt::AlignHCenter);
 708     m_nameLabel->setSizePolicy(QSizePolicy::Preferred, QSizePolicy::Fixed);
 709
 710     // preview
 711     m_preview = new PixmapViewer(this);
 712     m_preview->setMinimumWidth(KIconLoader::SizeEnormous + KIconLoader::SizeMedium);
 713     m_preview->setMinimumHeight(KIconLoader::SizeEnormous);
 714
 715     if (MetaDataWidget::metaDataAvailable()) {
 716         // rating, comment and tags
 717         m_metaDataWidget = new MetaDataWidget(this);
 718         m_metaDataWidget->setSizePolicy(QSizePolicy::Preferred, QSizePolicy::Fixed);
 719     }
 720
 721     // general meta text information
 722     m_metaTextLabel = new MetaTextLabel(this);
 723     m_metaTextLabel->setSizePolicy(QSizePolicy::Preferred, QSizePolicy::Fixed);
 724
 725     m_metaTextArea = new QScrollArea(this);
 726     m_metaTextArea->setWidget(m_metaTextLabel);
 727     m_metaTextArea->setWidgetResizable(true);
 728     m_metaTextArea->setFrameShape(QFrame::NoFrame);
 729
 730     QWidget* viewport = m_metaTextArea->viewport();
 731     viewport->installEventFilter(this);
 732
 733     QPalette palette = viewport->palette();
 734     palette.setColor(viewport->backgroundRole(), QColor(Qt::transparent));
 735     viewport->setPalette(palette);
 736
 737     layout->addWidget(m_nameLabel);
 738     layout->addWidget(new KSeparator(this));
 739     layout->addWidget(m_preview);
 740     layout->addWidget(new KSeparator(this));
 741     if (m_metaDataWidget != 0) {
 742         layout->addWidget(m_metaDataWidget);
 743         layout->addWidget(new KSeparator(this));
 744     }
 745     layout->addWidget(m_metaTextArea);
 746     setLayout(layout);
 747
 748     org::kde::KDirNotify* dirNotify = new org::kde::KDirNotify(QString(), QString(),
 749                                                                QDBusConnection::sessionBus(), this);
 750     connect(dirNotify, SIGNAL(FileRenamed(QString, QString)), SLOT(slotFileRenamed(QString, QString)));
 751     connect(dirNotify, SIGNAL(FilesAdded(QString)), SLOT(slotFilesAdded(QString)));
 752     connect(dirNotify, SIGNAL(FilesChanged(QStringList)), SLOT(slotFilesChanged(QStringList)));
 753     connect(dirNotify, SIGNAL(FilesRemoved(QStringList)), SLOT(slotFilesRemoved(QStringList)));
 754     connect(dirNotify, SIGNAL(enteredDirectory(QString)), SLOT(slotEnteredDirectory(QString)));
 755     connect(dirNotify, SIGNAL(leftDirectory(QString)), SLOT(slotLeftDirectory(QString)));
 756
 757     m_initialized = true;
 758 }
 759
 760 #include "informationpanel.moc"