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_previewSeparator(0),
  90     m_phononWidget(0),
  91     m_metaDataWidget(0),
  92     m_metaDataSeparator(0),
  93     m_metaTextArea(0),
  94     m_metaTextLabel(0)
  95 {
  96 }
  97
  98 InformationPanel::~InformationPanel()
  99 {
 100     InformationPanelSettings::self()->writeConfig();
 101 }
 102
 103 QSize InformationPanel::sizeHint() const
 104 {
 105     QSize size = Panel::sizeHint();
 106     size.setWidth(minimumSizeHint().width());
 107     return size;
 108 }
 109
 110 void InformationPanel::setUrl(const KUrl& url)
 111 {
 112     Panel::setUrl(url);
 113     if (url.isValid() && !isEqualToShownUrl(url)) {
 114         if (isVisible()) {
 115             cancelRequest();
 116             m_shownUrl = url;
 117             showItemInfo();
 118         } else {
 119             m_shownUrl = url;
 120         }
 121     }
 122 }
 123
 124 void InformationPanel::setSelection(const KFileItemList& selection)
 125 {
 126     if (!isVisible()) {
 127         return;
 128     }
 129
 130     if ((selection.count() == 0) && (m_selection.count() == 0)) {
 131         // The selection has not really changed, only the current index.
 132         // QItemSelectionModel emits a signal in this case and it is less
 133         // expensive doing the check this way instead of patching
 134         // DolphinView::emitSelectionChanged().
 135         return;
 136     }
 137
 138     m_selection = selection;
 139
 140     const int count = selection.count();
 141     if (count == 0) {
 142         if (!isEqualToShownUrl(url())) {
 143             m_shownUrl = url();
 144             showItemInfo();
 145         }
 146     } else {
 147         if ((count == 1) && !selection.first().url().isEmpty()) {
 148             m_urlCandidate = selection.first().url();
 149         }
 150         m_infoTimer->start();
 151     }
 152 }
 153
 154 void InformationPanel::requestDelayedItemInfo(const KFileItem& item)
 155 {
 156     if (!isVisible()) {
 157         return;
 158     }
 159
 160     cancelRequest();
 161
 162     m_fileItem = KFileItem();
 163     if (item.isNull()) {
 164         // The cursor is above the viewport. If files are selected,
 165         // show information regarding the selection.
 166         if (m_selection.size() > 0) {
 167             m_pendingPreview = false;
 168             m_infoTimer->start();
 169         }
 170     } else {
 171         const KUrl url = item.url();
 172         if (url.isValid() && !isEqualToShownUrl(url)) {
 173             m_urlCandidate = item.url();
 174             m_fileItem = item;
 175             m_infoTimer->start();
 176         }
 177     }
 178 }
 179
 180 void InformationPanel::showEvent(QShowEvent* event)
 181 {
 182     Panel::showEvent(event);
 183     if (!event->spontaneous()) {
 184         if (!m_initialized) {
 185             // do a delayed initialization so that no performance
 186             // penalty is given when Dolphin is started with a closed
 187             // Information Panel
 188             init();
 189         }
 190         showItemInfo();
 191     }
 192 }
 193
 194 void InformationPanel::resizeEvent(QResizeEvent* event)
 195 {
 196     if (isVisible()) {
 197         // If the text inside the name label or the info label cannot
 198         // get wrapped, then the maximum width of the label is increased
 199         // so that the width of the information panel gets increased.
 200         // To prevent this, the maximum width is adjusted to
 201         // the current width of the panel.
 202         const int maxWidth = event->size().width() - KDialog::spacingHint() * 4;
 203         m_nameLabel->setMaximumWidth(maxWidth);
 204
 205         // try to increase the preview as large as possible
 206         m_preview->setSizeHint(QSize(maxWidth, maxWidth));
 207         m_urlCandidate = m_shownUrl; // reset the URL candidate if a resizing is done
 208         m_infoTimer->start();
 209
 210         if (m_phononWidget->isVisible() && (m_phononWidget->mode() == PhononWidget::Video)) {
 211             // assure that the size of the video player is the same as the preview size
 212             m_phononWidget->setVideoSize(QSize(maxWidth, maxWidth));
 213         }
 214     }
 215     Panel::resizeEvent(event);
 216 }
 217
 218 bool InformationPanel::eventFilter(QObject* obj, QEvent* event)
 219 {
 220     // Check whether the size of the meta text area has changed and adjust
 221     // the fixed width in a way that no horizontal scrollbar needs to be shown.
 222     if ((obj == m_metaTextArea->viewport()) && (event->type() == QEvent::Resize)) {
 223         QResizeEvent* resizeEvent = static_cast<QResizeEvent*>(event);
 224         m_metaTextLabel->setFixedWidth(resizeEvent->size().width());
 225     }
 226     return Panel::eventFilter(obj, event);
 227 }
 228
 229 void InformationPanel::contextMenuEvent(QContextMenuEvent* event)
 230 {
 231     Panel::contextMenuEvent(event);
 232
 233 #ifdef HAVE_NEPOMUK
 234     if (showMultipleSelectionInfo()) {
 235         return;
 236     }
 237
 238     KMenu popup(this);
 239
 240     QAction* previewAction = popup.addAction(i18nc("@action:inmenu", "Preview"));
 241     previewAction->setIcon(KIcon("view-preview"));
 242     previewAction->setCheckable(true);
 243     previewAction->setChecked(InformationPanelSettings::showPreview());
 244
 245     const bool metaDataAvailable = MetaDataWidget::metaDataAvailable();
 246
 247     QAction* ratingAction = popup.addAction(i18nc("@action:inmenu", "Rating"));
 248     ratingAction->setIcon(KIcon("rating"));
 249     ratingAction->setCheckable(true);
 250     ratingAction->setChecked(InformationPanelSettings::showRating());
 251     ratingAction->setEnabled(metaDataAvailable);
 252
 253     QAction* commentAction = popup.addAction(i18nc("@action:inmenu", "Comment"));
 254     commentAction->setIcon(KIcon("text-plain"));
 255     commentAction->setCheckable(true);
 256     commentAction->setChecked(InformationPanelSettings::showComment());
 257     commentAction->setEnabled(metaDataAvailable);
 258
 259     QAction* tagsAction = popup.addAction(i18nc("@action:inmenu", "Tags"));
 260     tagsAction->setCheckable(true);
 261     tagsAction->setChecked(InformationPanelSettings::showTags());
 262     tagsAction->setEnabled(metaDataAvailable);
 263
 264     KConfig config("kmetainformationrc", KConfig::NoGlobals);
 265     KConfigGroup settings = config.group("Show");
 266     initMetaInfoSettings(settings);
 267
 268     QList<QAction*> actions;
 269
 270     // Get all meta information labels that are available for
 271     // the currently shown file item and add them to the popup.
 272     Nepomuk::Resource res(fileItem().url());
 273     QHash<QUrl, Nepomuk::Variant> properties = res.properties();
 274     QHash<QUrl, Nepomuk::Variant>::const_iterator it = properties.constBegin();
 275     while (it != properties.constEnd()) {
 276         Nepomuk::Types::Property prop(it.key());
 277         const QString key = prop.label();
 278
 279         // Meta information provided by Nepomuk that is already
 280         // available from KFileItem should not be configurable.
 281         bool skip = (key == "fileExtension") ||
 282                     (key == "name") ||
 283                     (key == "sourceModified") ||
 284                     (key == "size") ||
 285                     (key == "mime type");
 286         if (!skip) {
 287             // Check whether there is already a meta information
 288             // having the same label. In this case don't show it
 289             // twice in the menu.
 290             foreach (const QAction* action, actions) {
 291                 if (action->data().toString() == key) {
 292                     skip = true;
 293                     break;
 294                 }
 295             }
 296         }
 297
 298         if (!skip) {
 299             const QString label = key; // TODO
 300             QAction* action = new QAction(label, &popup);
 301             action->setCheckable(true);
 302             action->setChecked(settings.readEntry(key, true));
 303             action->setData(key);
 304             actions.append(action);
 305         }
 306
 307         ++it;
 308     }
 309
 310     if (actions.count() > 0) {
 311         popup.addSeparator();
 312
 313         // add all items alphabetically sorted to the popup
 314         qSort(actions.begin(), actions.end(), lessThan);
 315         foreach (QAction* action, actions) {
 316             popup.addAction(action);
 317         }
 318     }
 319
 320     // Open the popup and adjust the settings for the
 321     // selected action.
 322     QAction* action = popup.exec(QCursor::pos());
 323     if (action == 0) {
 324         return;
 325     }
 326
 327     const bool isChecked = action->isChecked();
 328     if (action == previewAction) {
 329         m_preview->setVisible(isChecked);
 330         m_previewSeparator->setVisible(isChecked);
 331         InformationPanelSettings::setShowPreview(isChecked);
 332         updatePhononWidget();
 333     } else if (action == ratingAction) {
 334         m_metaDataWidget->setRatingVisible(isChecked);
 335         InformationPanelSettings::setShowRating(isChecked);
 336     } else if (action == commentAction) {
 337         m_metaDataWidget->setCommentVisible(isChecked);
 338         InformationPanelSettings::setShowComment(isChecked);
 339     } else if (action == tagsAction) {
 340         m_metaDataWidget->setTagsVisible(isChecked);
 341         InformationPanelSettings::setShowTags(isChecked);
 342     } else {
 343         settings.writeEntry(action->data().toString(), action->isChecked());
 344         settings.sync();
 345         showMetaInfo();
 346     }
 347
 348     if (m_metaDataWidget != 0) {
 349         const bool visible = m_metaDataWidget->isRatingVisible() ||
 350                              m_metaDataWidget->isCommentVisible() ||
 351                              m_metaDataWidget->areTagsVisible();
 352         m_metaDataSeparator->setVisible(visible);
 353     }
 354 #endif
 355 }
 356
 357 void InformationPanel::showItemInfo()
 358 {
 359     if (!isVisible()) {
 360         return;
 361     }
 362
 363     cancelRequest();
 364
 365     if (showMultipleSelectionInfo()) {
 366         KIconLoader iconLoader;
 367         QPixmap icon = iconLoader.loadIcon("dialog-information",
 368                                            KIconLoader::NoGroup,
 369                                            KIconLoader::SizeEnormous);
 370         m_preview->setPixmap(icon);
 371         setNameLabelText(i18ncp("@info", "%1 item selected", "%1 items selected",  m_selection.count()));
 372         m_shownUrl = KUrl();
 373     } else {
 374         const KFileItem item = fileItem();
 375         const KUrl itemUrl = item.url();
 376         if (!applyPlace(itemUrl)) {
 377             // try to get a preview pixmap from the item...
 378             m_pendingPreview = true;
 379
 380             // Mark the currently shown preview as outdated. This is done
 381             // with a small delay to prevent a flickering when the next preview
 382             // can be shown within a short timeframe.
 383             m_outdatedPreviewTimer->start();
 384
 385             KIO::PreviewJob* job = KIO::filePreview(KFileItemList() << item,
 386                                                     m_preview->width(),
 387                                                     m_preview->height(),
 388                                                     0,
 389                                                     0,
 390                                                     false,
 391                                                     true);
 392
 393             connect(job, SIGNAL(gotPreview(const KFileItem&, const QPixmap&)),
 394                     this, SLOT(showPreview(const KFileItem&, const QPixmap&)));
 395             connect(job, SIGNAL(failed(const KFileItem&)),
 396                     this, SLOT(showIcon(const KFileItem&)));
 397
 398             setNameLabelText(itemUrl.fileName());
 399         }
 400     }
 401
 402     showMetaInfo();
 403 }
 404
 405 void InformationPanel::slotInfoTimeout()
 406 {
 407     m_shownUrl = m_urlCandidate;
 408     showItemInfo();
 409 }
 410
 411 void InformationPanel::markOutdatedPreview()
 412 {
 413     KIconEffect iconEffect;
 414     QPixmap disabledPixmap = iconEffect.apply(m_preview->pixmap(),
 415                                               KIconLoader::Desktop,
 416                                               KIconLoader::DisabledState);
 417     m_preview->setPixmap(disabledPixmap);
 418 }
 419
 420 void InformationPanel::showIcon(const KFileItem& item)
 421 {
 422     m_outdatedPreviewTimer->stop();
 423     m_pendingPreview = false;
 424     if (!applyPlace(item.url())) {
 425         m_preview->setPixmap(item.pixmap(KIconLoader::SizeEnormous));
 426     }
 427 }
 428
 429 void InformationPanel::showPreview(const KFileItem& item,
 430                                   const QPixmap& pixmap)
 431 {
 432     m_outdatedPreviewTimer->stop();
 433
 434     Q_UNUSED(item);
 435     if (m_pendingPreview) {
 436         m_preview->setPixmap(pixmap);
 437         m_pendingPreview = false;
 438     }
 439 }
 440
 441 void InformationPanel::slotFileRenamed(const QString& source, const QString& dest)
 442 {
 443     const KUrl sourceUrl = KUrl(source);
 444
 445     // Verify whether the renamed item is selected. If this is the case, the
 446     // selection must be updated with the renamed item.
 447     bool isSelected = false;
 448     for (int i = m_selection.size() - 1; i >= 0; --i) {
 449         if (m_selection[i].url() == sourceUrl) {
 450             m_selection.removeAt(i);
 451             isSelected = true;
 452             break;
 453         }
 454     }
 455
 456     if ((m_shownUrl == sourceUrl) || isSelected) {
 457         m_shownUrl = KUrl(dest);
 458         m_fileItem = KFileItem(KFileItem::Unknown, KFileItem::Unknown, m_shownUrl);
 459         if (isSelected) {
 460             m_selection.append(m_fileItem);
 461         }
 462         showItemInfo();
 463     }
 464 }
 465
 466 void InformationPanel::slotFilesAdded(const QString& directory)
 467 {
 468     if (m_shownUrl == KUrl(directory)) {
 469         // If the 'trash' icon changes because the trash has been emptied or got filled,
 470         // the signal filesAdded("trash:/") will be emitted.
 471         KFileItem item(KFileItem::Unknown, KFileItem::Unknown, KUrl(directory));
 472         requestDelayedItemInfo(item);
 473     }
 474 }
 475
 476 void InformationPanel::slotFilesChanged(const QStringList& files)
 477 {
 478     foreach (const QString& fileName, files) {
 479         if (m_shownUrl == KUrl(fileName)) {
 480             showItemInfo();
 481             break;
 482         }
 483     }
 484 }
 485
 486 void InformationPanel::slotFilesRemoved(const QStringList& files)
 487 {
 488     foreach (const QString& fileName, files) {
 489         if (m_shownUrl == KUrl(fileName)) {
 490             // the currently shown item has been removed, show
 491             // the parent directory as fallback
 492             reset();
 493             break;
 494         }
 495     }
 496 }
 497
 498 void InformationPanel::slotEnteredDirectory(const QString& directory)
 499 {
 500     if (m_shownUrl == KUrl(directory)) {
 501         KFileItem item(KFileItem::Unknown, KFileItem::Unknown, KUrl(directory));
 502         requestDelayedItemInfo(item);
 503     }
 504 }
 505
 506 void InformationPanel::slotLeftDirectory(const QString& directory)
 507 {
 508     if (m_shownUrl == KUrl(directory)) {
 509         // The signal 'leftDirectory' is also emitted when a media
 510         // has been unmounted. In this case no directory change will be
 511         // done in Dolphin, but the Information Panel must be updated to
 512         // indicate an invalid directory.
 513         reset();
 514     }
 515 }
 516
 517 void InformationPanel::slotPlayingStarted()
 518 {
 519     m_preview->setVisible(m_phononWidget->mode() != PhononWidget::Video);
 520 }
 521
 522 void InformationPanel::slotPlayingStopped()
 523 {
 524     m_preview->setVisible(true);
 525 }
 526
 527 bool InformationPanel::applyPlace(const KUrl& url)
 528 {
 529     KFilePlacesModel* placesModel = DolphinSettings::instance().placesModel();
 530     int count = placesModel->rowCount();
 531
 532     for (int i = 0; i < count; ++i) {
 533         QModelIndex index = placesModel->index(i, 0);
 534
 535         if (url.equals(placesModel->url(index), KUrl::CompareWithoutTrailingSlash)) {
 536             setNameLabelText(placesModel->text(index));
 537             m_preview->setPixmap(placesModel->icon(index).pixmap(128, 128));
 538             return true;
 539         }
 540     }
 541
 542     return false;
 543 }
 544
 545 void InformationPanel::cancelRequest()
 546 {
 547     m_infoTimer->stop();
 548 }
 549
 550 void InformationPanel::showMetaInfo()
 551 {
 552     m_metaTextLabel->clear();
 553
 554     if (showMultipleSelectionInfo()) {
 555         if (m_metaDataWidget != 0) {
 556             KUrl::List urls;
 557             foreach (const KFileItem& item, m_selection) {
 558                 urls.append(item.targetUrl());
 559             }
 560             m_metaDataWidget->setFiles(urls);
 561         }
 562
 563         quint64 totalSize = 0;
 564         foreach (const KFileItem& item, m_selection) {
 565             // Only count the size of files, not dirs to match what
 566             // DolphinViewContainer::selectionStatusBarText() does.
 567             if (!item.isDir() && !item.isLink()) {
 568                 totalSize += item.size();
 569             }
 570         }
 571         m_metaTextLabel->add(i18nc("@label", "Total size:"), KIO::convertSize(totalSize));
 572     } else {
 573         const KFileItem item = fileItem();
 574         if (item.isDir()) {
 575             m_metaTextLabel->add(i18nc("@label", "Type:"), i18nc("@label", "Folder"));
 576             m_metaTextLabel->add(i18nc("@label", "Modified:"), item.timeString());
 577         } else {
 578             m_metaTextLabel->add(i18nc("@label", "Type:"), item.mimeComment());
 579
 580             m_metaTextLabel->add(i18nc("@label", "Size:"), KIO::convertSize(item.size()));
 581             m_metaTextLabel->add(i18nc("@label", "Modified:"), item.timeString());
 582
 583 #ifdef HAVE_NEPOMUK
 584             KConfig config("kmetainformationrc", KConfig::NoGlobals);
 585             KConfigGroup settings = config.group("Show");
 586             initMetaInfoSettings(settings);
 587
 588             Nepomuk::Resource res(item.url());
 589
 590             QHash<QUrl, Nepomuk::Variant> properties = res.properties();
 591             QHash<QUrl, Nepomuk::Variant>::const_iterator it = properties.constBegin();
 592             while (it != properties.constEnd()) {
 593                 Nepomuk::Types::Property prop(it.key());
 594                 const QString label = prop.label();
 595                 if (settings.readEntry(label, true)) {
 596                     // TODO: use Nepomuk::formatValue(res, prop) if available
 597                     // instead of it.value().toString()
 598                     m_metaTextLabel->add(label, it.value().toString());
 599                 }
 600                 ++it;
 601             }
 602 #endif
 603         }
 604
 605         if (m_metaDataWidget != 0) {
 606             m_metaDataWidget->setFile(item.targetUrl());
 607         }
 608     }
 609
 610     updatePhononWidget();
 611 }
 612
 613 KFileItem InformationPanel::fileItem() const
 614 {
 615     if (!m_fileItem.isNull()) {
 616         return m_fileItem;
 617     }
 618
 619     if (!m_selection.isEmpty()) {
 620         Q_ASSERT(m_selection.count() == 1);
 621         return m_selection.first();
 622     }
 623
 624     // no item is hovered and no selection has been done: provide
 625     // an item for the directory represented by m_shownUrl
 626     KFileItem item(KFileItem::Unknown, KFileItem::Unknown, m_shownUrl);
 627     item.refresh();
 628     return item;
 629 }
 630
 631 bool InformationPanel::showMultipleSelectionInfo() const
 632 {
 633     return m_fileItem.isNull() && (m_selection.count() > 1);
 634 }
 635
 636 bool InformationPanel::isEqualToShownUrl(const KUrl& url) const
 637 {
 638     return m_shownUrl.equals(url, KUrl::CompareWithoutTrailingSlash);
 639 }
 640
 641 void InformationPanel::setNameLabelText(const QString& text)
 642 {
 643     QTextOption textOption;
 644     textOption.setWrapMode(QTextOption::WrapAtWordBoundaryOrAnywhere);
 645
 646     QTextLayout textLayout(text);
 647     textLayout.setFont(m_nameLabel->font());
 648     textLayout.setTextOption(textOption);
 649
 650     QString wrappedText;
 651     wrappedText.reserve(text.length());
 652
 653     // wrap the text to fit into the width of m_nameLabel
 654     textLayout.beginLayout();
 655     QTextLine line = textLayout.createLine();
 656     while (line.isValid()) {
 657         line.setLineWidth(m_nameLabel->width());
 658         wrappedText += text.mid(line.textStart(), line.textLength());
 659
 660         line = textLayout.createLine();
 661         if (line.isValid()) {
 662             wrappedText += QChar::LineSeparator;
 663         }
 664     }
 665     textLayout.endLayout();
 666
 667     m_nameLabel->setText(wrappedText);
 668 }
 669
 670 void InformationPanel::reset()
 671 {
 672     m_selection.clear();
 673     m_shownUrl = url();
 674     m_fileItem = KFileItem();
 675     showItemInfo();
 676 }
 677
 678 void InformationPanel::initMetaInfoSettings(KConfigGroup& group)
 679 {
 680     if (!group.readEntry("initialized", false)) {
 681         // The resource file is read the first time. Assure
 682         // that some meta information is disabled per default.
 683         group.writeEntry("fileExtension", false);
 684         group.writeEntry("url", false);
 685         group.writeEntry("sourceModified", false);
 686         group.writeEntry("parentUrl", false);
 687         group.writeEntry("size", false);
 688         group.writeEntry("mime type", false);
 689         group.writeEntry("depth", false);
 690         group.writeEntry("name", false);
 691
 692         // mark the group as initialized
 693         group.writeEntry("initialized", true);
 694     }
 695 }
 696
 697 void InformationPanel::updatePhononWidget()
 698 {
 699     const bool multipleSelections = showMultipleSelectionInfo();
 700     const bool showPreview = InformationPanelSettings::showPreview();
 701
 702     if (multipleSelections || !showPreview) {
 703         m_phononWidget->hide();
 704     } else if (!multipleSelections && showPreview) {
 705         const KFileItem item = fileItem();
 706         const QString mimeType = item.mimetype();
 707         const bool usePhonon = Phonon::BackendCapabilities::isMimeTypeAvailable(mimeType) &&
 708                                (mimeType != "image/png");  // TODO: workaround, as Phonon
 709                                                            // thinks it supports PNG images
 710         if (usePhonon) {
 711             m_phononWidget->show();
 712             PhononWidget::Mode mode = mimeType.startsWith(QLatin1String("video"))
 713                                       ? PhononWidget::Video
 714                                       : PhononWidget::Audio;
 715             m_phononWidget->setMode(mode);
 716             m_phononWidget->setUrl(item.url());
 717             if ((mode == PhononWidget::Video) && m_preview->isVisible()) {
 718                 m_phononWidget->setVideoSize(m_preview->size());
 719             }
 720         } else {
 721             m_phononWidget->hide();
 722             m_preview->setVisible(true);
 723         }
 724     }
 725 }
 726
 727 void InformationPanel::init()
 728 {
 729     m_infoTimer = new QTimer(this);
 730     m_infoTimer->setInterval(300);
 731     m_infoTimer->setSingleShot(true);
 732     connect(m_infoTimer, SIGNAL(timeout()),
 733             this, SLOT(slotInfoTimeout()));
 734
 735     // Initialize timer for disabling an outdated preview with a small
 736     // delay. This prevents flickering if the new preview can be generated
 737     // within a very small timeframe.
 738     m_outdatedPreviewTimer = new QTimer(this);
 739     m_outdatedPreviewTimer->setInterval(300);
 740     m_outdatedPreviewTimer->setSingleShot(true);
 741     connect(m_outdatedPreviewTimer, SIGNAL(timeout()),
 742             this, SLOT(markOutdatedPreview()));
 743
 744     QVBoxLayout* layout = new QVBoxLayout;
 745     layout->setSpacing(KDialog::spacingHint());
 746
 747     // name
 748     m_nameLabel = new QLabel(this);
 749     QFont font = m_nameLabel->font();
 750     font.setBold(true);
 751     m_nameLabel->setFont(font);
 752     m_nameLabel->setAlignment(Qt::AlignHCenter);
 753     m_nameLabel->setSizePolicy(QSizePolicy::Preferred, QSizePolicy::Fixed);
 754     m_nameLabel->setMaximumWidth(KIconLoader::SizeEnormous);
 755
 756     // preview
 757     const int minPreviewWidth = KIconLoader::SizeEnormous + KIconLoader::SizeMedium;
 758
 759     m_preview = new PixmapViewer(this);
 760     m_preview->setMinimumWidth(minPreviewWidth);
 761     m_preview->setMinimumHeight(KIconLoader::SizeEnormous);
 762
 763     m_phononWidget = new PhononWidget(this);
 764     m_phononWidget->setMinimumWidth(minPreviewWidth);
 765     connect(m_phononWidget, SIGNAL(playingStarted()),
 766             this, SLOT(slotPlayingStarted()));
 767     connect(m_phononWidget, SIGNAL(playingStopped()),
 768             this, SLOT(slotPlayingStopped()));
 769
 770     m_previewSeparator = new KSeparator(this);
 771
 772     const bool showPreview = InformationPanelSettings::showPreview();
 773     m_preview->setVisible(showPreview);
 774     m_previewSeparator->setVisible(showPreview);
 775
 776     if (MetaDataWidget::metaDataAvailable()) {
 777         // rating, comment and tags
 778         m_metaDataWidget = new MetaDataWidget(this);
 779         m_metaDataWidget->setSizePolicy(QSizePolicy::Preferred, QSizePolicy::Fixed);
 780
 781         const bool showRating  = InformationPanelSettings::showRating();
 782         const bool showComment = InformationPanelSettings::showComment();
 783         const bool showTags    = InformationPanelSettings::showTags();
 784
 785         m_metaDataWidget->setRatingVisible(showRating);
 786         m_metaDataWidget->setCommentVisible(showComment);
 787         m_metaDataWidget->setTagsVisible(showTags);
 788
 789         m_metaDataSeparator = new KSeparator(this);
 790         m_metaDataSeparator->setVisible(showRating || showComment || showTags);
 791     }
 792
 793     // general meta text information
 794     m_metaTextLabel = new MetaTextLabel(this);
 795     m_metaTextLabel->setSizePolicy(QSizePolicy::Preferred, QSizePolicy::Fixed);
 796
 797     m_metaTextArea = new QScrollArea(this);
 798     m_metaTextArea->setWidget(m_metaTextLabel);
 799     m_metaTextArea->setWidgetResizable(true);
 800     m_metaTextArea->setFrameShape(QFrame::NoFrame);
 801
 802     QWidget* viewport = m_metaTextArea->viewport();
 803     viewport->installEventFilter(this);
 804
 805     QPalette palette = viewport->palette();
 806     palette.setColor(viewport->backgroundRole(), QColor(Qt::transparent));
 807     viewport->setPalette(palette);
 808
 809     layout->addWidget(m_nameLabel);
 810     layout->addWidget(new KSeparator(this));
 811     layout->addWidget(m_preview);
 812     layout->addWidget(m_phononWidget);
 813     layout->addWidget(m_previewSeparator);
 814     if (m_metaDataWidget != 0) {
 815         layout->addWidget(m_metaDataWidget);
 816         layout->addWidget(m_metaDataSeparator);
 817     }
 818     layout->addWidget(m_metaTextArea);
 819     setLayout(layout);
 820
 821     org::kde::KDirNotify* dirNotify = new org::kde::KDirNotify(QString(), QString(),
 822                                                                QDBusConnection::sessionBus(), this);
 823     connect(dirNotify, SIGNAL(FileRenamed(QString, QString)), SLOT(slotFileRenamed(QString, QString)));
 824     connect(dirNotify, SIGNAL(FilesAdded(QString)), SLOT(slotFilesAdded(QString)));
 825     connect(dirNotify, SIGNAL(FilesChanged(QStringList)), SLOT(slotFilesChanged(QStringList)));
 826     connect(dirNotify, SIGNAL(FilesRemoved(QStringList)), SLOT(slotFilesRemoved(QStringList)));
 827     connect(dirNotify, SIGNAL(enteredDirectory(QString)), SLOT(slotEnteredDirectory(QString)));
 828     connect(dirNotify, SIGNAL(leftDirectory(QString)), SLOT(slotLeftDirectory(QString)));
 829
 830     m_initialized = true;
 831 }
 832
 833 #include "informationpanel.moc"