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
  39 #define DISABLE_NEPOMUK_LEGACY
  40
  41 #include <Nepomuk/Resource>
  42 #include <Nepomuk/Types/Property>
  43 #include <Nepomuk/Variant>
  44 #endif
  45
  46 #include <Phonon/BackendCapabilities>
  47 #include <Phonon/MediaObject>
  48 #include <Phonon/SeekSlider>
  49
  50 #include <QEvent>
  51 #include <QInputDialog>
  52 #include <QLabel>
  53 #include <QPainter>
  54 #include <QPixmap>
  55 #include <QResizeEvent>
  56 #include <QScrollArea>
  57 #include <QTextLayout>
  58 #include <QTextLine>
  59 #include <QTimer>
  60 #include <QScrollBar>
  61 #include <QVBoxLayout>
  62
  63 #include "dolphin_informationpanelsettings.h"
  64 #include "settings/dolphinsettings.h"
  65 #include "metadatawidget.h"
  66 #include "metatextlabel.h"
  67 #include "phononwidget.h"
  68 #include "pixmapviewer.h"
  69
  70 /**
  71  * Helper function for sorting items with qSort() in
  72  * InformationPanel::contextMenu().
  73  */
  74 bool lessThan(const QAction* action1, const QAction* action2)
  75 {
  76     return action1->text() < action2->text();
  77 }
  78
  79
  80 InformationPanel::InformationPanel(QWidget* parent) :
  81     Panel(parent),
  82     m_initialized(false),
  83     m_pendingPreview(false),
  84     m_infoTimer(0),
  85     m_outdatedPreviewTimer(0),
  86     m_shownUrl(),
  87     m_urlCandidate(),
  88     m_fileItem(),
  89     m_selection(),
  90     m_nameLabel(0),
  91     m_preview(0),
  92     m_previewSeparator(0),
  93     m_phononWidget(0),
  94     m_metaDataWidget(0),
  95     m_metaDataSeparator(0),
  96     m_metaTextArea(0),
  97     m_metaTextLabel(0)
  98 {
  99 }
 100
 101 InformationPanel::~InformationPanel()
 102 {
 103     InformationPanelSettings::self()->writeConfig();
 104 }
 105
 106 QSize InformationPanel::sizeHint() const
 107 {
 108     QSize size = Panel::sizeHint();
 109     size.setWidth(minimumSizeHint().width());
 110     return size;
 111 }
 112
 113 void InformationPanel::setUrl(const KUrl& url)
 114 {
 115     Panel::setUrl(url);
 116     if (url.isValid() && !isEqualToShownUrl(url)) {
 117         if (isVisible()) {
 118             cancelRequest();
 119             m_shownUrl = url;
 120             showItemInfo();
 121         } else {
 122             m_shownUrl = url;
 123         }
 124     }
 125 }
 126
 127 void InformationPanel::setSelection(const KFileItemList& selection)
 128 {
 129     if (!isVisible()) {
 130         return;
 131     }
 132
 133     if ((selection.count() == 0) && (m_selection.count() == 0)) {
 134         // The selection has not really changed, only the current index.
 135         // QItemSelectionModel emits a signal in this case and it is less
 136         // expensive doing the check this way instead of patching
 137         // DolphinView::emitSelectionChanged().
 138         return;
 139     }
 140
 141     m_selection = selection;
 142
 143     const int count = selection.count();
 144     if (count == 0) {
 145         if (!isEqualToShownUrl(url())) {
 146             m_shownUrl = url();
 147             showItemInfo();
 148         }
 149     } else {
 150         if ((count == 1) && !selection.first().url().isEmpty()) {
 151             m_urlCandidate = selection.first().url();
 152         }
 153         m_infoTimer->start();
 154     }
 155 }
 156
 157 void InformationPanel::requestDelayedItemInfo(const KFileItem& item)
 158 {
 159     if (!isVisible()) {
 160         return;
 161     }
 162
 163     cancelRequest();
 164
 165     m_fileItem = KFileItem();
 166     if (item.isNull()) {
 167         // The cursor is above the viewport. If files are selected,
 168         // show information regarding the selection.
 169         if (m_selection.size() > 0) {
 170             m_pendingPreview = false;
 171             m_infoTimer->start();
 172         }
 173     } else {
 174         const KUrl url = item.url();
 175         if (url.isValid() && !isEqualToShownUrl(url)) {
 176             m_urlCandidate = item.url();
 177             m_fileItem = item;
 178             m_infoTimer->start();
 179         }
 180     }
 181 }
 182
 183 void InformationPanel::showEvent(QShowEvent* event)
 184 {
 185     Panel::showEvent(event);
 186     if (!event->spontaneous()) {
 187         if (!m_initialized) {
 188             // do a delayed initialization so that no performance
 189             // penalty is given when Dolphin is started with a closed
 190             // Information Panel
 191             init();
 192         }
 193         showItemInfo();
 194     }
 195 }
 196
 197 void InformationPanel::resizeEvent(QResizeEvent* event)
 198 {
 199     if (isVisible()) {
 200         // If the text inside the name label or the info label cannot
 201         // get wrapped, then the maximum width of the label is increased
 202         // so that the width of the information panel gets increased.
 203         // To prevent this, the maximum width is adjusted to
 204         // the current width of the panel.
 205         const int maxWidth = event->size().width() - KDialog::spacingHint() * 4;
 206         m_nameLabel->setMaximumWidth(maxWidth);
 207
 208         // The metadata widget also contains a text widget which may return
 209         // a large preferred width.
 210         if (m_metaDataWidget != 0) {
 211             m_metaDataWidget->setMaximumWidth(maxWidth);
 212         }
 213
 214         // try to increase the preview as large as possible
 215         m_preview->setSizeHint(QSize(maxWidth, maxWidth));
 216         m_urlCandidate = m_shownUrl; // reset the URL candidate if a resizing is done
 217         m_infoTimer->start();
 218
 219         if (m_phononWidget->isVisible() && (m_phononWidget->mode() == PhononWidget::Video)) {
 220             // assure that the size of the video player is the same as the preview size
 221             m_phononWidget->setVideoSize(QSize(maxWidth, maxWidth));
 222         }
 223     }
 224     Panel::resizeEvent(event);
 225 }
 226
 227 bool InformationPanel::eventFilter(QObject* obj, QEvent* event)
 228 {
 229     // Check whether the size of the meta text area has changed and adjust
 230     // the fixed width in a way that no horizontal scrollbar needs to be shown.
 231     if ((obj == m_metaTextArea->viewport()) && (event->type() == QEvent::Resize)) {
 232         QResizeEvent* resizeEvent = static_cast<QResizeEvent*>(event);
 233         m_metaTextLabel->setFixedWidth(resizeEvent->size().width());
 234     }
 235     return Panel::eventFilter(obj, event);
 236 }
 237
 238 void InformationPanel::contextMenuEvent(QContextMenuEvent* event)
 239 {
 240     Panel::contextMenuEvent(event);
 241
 242 #ifdef HAVE_NEPOMUK
 243     if (showMultipleSelectionInfo()) {
 244         return;
 245     }
 246
 247     KMenu popup(this);
 248
 249     QAction* previewAction = popup.addAction(i18nc("@action:inmenu", "Preview"));
 250     previewAction->setIcon(KIcon("view-preview"));
 251     previewAction->setCheckable(true);
 252     previewAction->setChecked(InformationPanelSettings::showPreview());
 253
 254     const bool metaDataAvailable = MetaDataWidget::metaDataAvailable();
 255
 256     QAction* ratingAction = popup.addAction(i18nc("@action:inmenu", "Rating"));
 257     ratingAction->setIcon(KIcon("rating"));
 258     ratingAction->setCheckable(true);
 259     ratingAction->setChecked(InformationPanelSettings::showRating());
 260     ratingAction->setEnabled(metaDataAvailable);
 261
 262     QAction* commentAction = popup.addAction(i18nc("@action:inmenu", "Comment"));
 263     commentAction->setIcon(KIcon("text-plain"));
 264     commentAction->setCheckable(true);
 265     commentAction->setChecked(InformationPanelSettings::showComment());
 266     commentAction->setEnabled(metaDataAvailable);
 267
 268     QAction* tagsAction = popup.addAction(i18nc("@action:inmenu", "Tags"));
 269     tagsAction->setCheckable(true);
 270     tagsAction->setChecked(InformationPanelSettings::showTags());
 271     tagsAction->setEnabled(metaDataAvailable);
 272
 273     KConfig config("kmetainformationrc", KConfig::NoGlobals);
 274     KConfigGroup settings = config.group("Show");
 275     initMetaInfoSettings(settings);
 276
 277     QList<QAction*> actions;
 278
 279     // Get all meta information labels that are available for
 280     // the currently shown file item and add them to the popup.
 281     Nepomuk::Resource res(fileItem().url());
 282     QHash<QUrl, Nepomuk::Variant> properties = res.properties();
 283     QHash<QUrl, Nepomuk::Variant>::const_iterator it = properties.constBegin();
 284     while (it != properties.constEnd()) {
 285         Nepomuk::Types::Property prop(it.key());
 286         const QString key = prop.name();
 287
 288         // Meta information provided by Nepomuk that is already
 289         // available from KFileItem should not be configurable.
 290         bool skip = (key == "fileExtension") ||
 291                     (key == "name") ||
 292                     (key == "sourceModified") ||
 293                     (key == "size") ||
 294                     (key == "mime type");
 295         if (!skip) {
 296             // Check whether there is already a meta information
 297             // having the same label. In this case don't show it
 298             // twice in the menu.
 299             foreach (const QAction* action, actions) {
 300                 if (action->data().toString() == key) {
 301                     skip = true;
 302                     break;
 303                 }
 304             }
 305         }
 306
 307         if (!skip) {
 308             const QString label = tunedLabel(prop.label());
 309             QAction* action = new QAction(label, &popup);
 310             action->setCheckable(true);
 311             action->setChecked(settings.readEntry(key, true));
 312             action->setData(key);
 313             actions.append(action);
 314         }
 315
 316         ++it;
 317     }
 318
 319     if (actions.count() > 0) {
 320         popup.addSeparator();
 321
 322         // add all items alphabetically sorted to the popup
 323         qSort(actions.begin(), actions.end(), lessThan);
 324         foreach (QAction* action, actions) {
 325             popup.addAction(action);
 326         }
 327     }
 328
 329     // Open the popup and adjust the settings for the
 330     // selected action.
 331     QAction* action = popup.exec(QCursor::pos());
 332     if (action == 0) {
 333         return;
 334     }
 335
 336     const bool isChecked = action->isChecked();
 337     if (action == previewAction) {
 338         m_preview->setVisible(isChecked);
 339         m_previewSeparator->setVisible(isChecked);
 340         InformationPanelSettings::setShowPreview(isChecked);
 341         updatePhononWidget();
 342     } else if (action == ratingAction) {
 343         m_metaDataWidget->setRatingVisible(isChecked);
 344         InformationPanelSettings::setShowRating(isChecked);
 345     } else if (action == commentAction) {
 346         m_metaDataWidget->setCommentVisible(isChecked);
 347         InformationPanelSettings::setShowComment(isChecked);
 348     } else if (action == tagsAction) {
 349         m_metaDataWidget->setTagsVisible(isChecked);
 350         InformationPanelSettings::setShowTags(isChecked);
 351     } else {
 352         settings.writeEntry(action->data().toString(), action->isChecked());
 353         settings.sync();
 354         showMetaInfo();
 355     }
 356
 357     if (m_metaDataWidget != 0) {
 358         const bool visible = m_metaDataWidget->isRatingVisible() ||
 359                              m_metaDataWidget->isCommentVisible() ||
 360                              m_metaDataWidget->areTagsVisible();
 361         m_metaDataSeparator->setVisible(visible);
 362     }
 363 #endif
 364 }
 365
 366 void InformationPanel::showItemInfo()
 367 {
 368     if (!isVisible()) {
 369         return;
 370     }
 371
 372     cancelRequest();
 373
 374     if (showMultipleSelectionInfo()) {
 375         KIconLoader iconLoader;
 376         QPixmap icon = iconLoader.loadIcon("dialog-information",
 377                                            KIconLoader::NoGroup,
 378                                            KIconLoader::SizeEnormous);
 379         m_preview->setPixmap(icon);
 380         setNameLabelText(i18ncp("@info", "%1 item selected", "%1 items selected",  m_selection.count()));
 381         m_shownUrl = KUrl();
 382     } else {
 383         const KFileItem item = fileItem();
 384         const KUrl itemUrl = item.url();
 385         if (!applyPlace(itemUrl)) {
 386             // try to get a preview pixmap from the item...
 387             m_pendingPreview = true;
 388
 389             // Mark the currently shown preview as outdated. This is done
 390             // with a small delay to prevent a flickering when the next preview
 391             // can be shown within a short timeframe.
 392             m_outdatedPreviewTimer->start();
 393
 394             KIO::PreviewJob* job = KIO::filePreview(KFileItemList() << item,
 395                                                     m_preview->width(),
 396                                                     m_preview->height(),
 397                                                     0,
 398                                                     0,
 399                                                     false,
 400                                                     true);
 401
 402             connect(job, SIGNAL(gotPreview(const KFileItem&, const QPixmap&)),
 403                     this, SLOT(showPreview(const KFileItem&, const QPixmap&)));
 404             connect(job, SIGNAL(failed(const KFileItem&)),
 405                     this, SLOT(showIcon(const KFileItem&)));
 406
 407             setNameLabelText(itemUrl.fileName());
 408         }
 409     }
 410
 411     showMetaInfo();
 412 }
 413
 414 void InformationPanel::slotInfoTimeout()
 415 {
 416     m_shownUrl = m_urlCandidate;
 417     showItemInfo();
 418 }
 419
 420 void InformationPanel::markOutdatedPreview()
 421 {
 422     KIconEffect iconEffect;
 423     QPixmap disabledPixmap = iconEffect.apply(m_preview->pixmap(),
 424                                               KIconLoader::Desktop,
 425                                               KIconLoader::DisabledState);
 426     m_preview->setPixmap(disabledPixmap);
 427 }
 428
 429 void InformationPanel::showIcon(const KFileItem& item)
 430 {
 431     m_outdatedPreviewTimer->stop();
 432     m_pendingPreview = false;
 433     if (!applyPlace(item.url())) {
 434         m_preview->setPixmap(item.pixmap(KIconLoader::SizeEnormous));
 435     }
 436 }
 437
 438 void InformationPanel::showPreview(const KFileItem& item,
 439                                   const QPixmap& pixmap)
 440 {
 441     m_outdatedPreviewTimer->stop();
 442
 443     Q_UNUSED(item);
 444     if (m_pendingPreview) {
 445         m_preview->setPixmap(pixmap);
 446         m_pendingPreview = false;
 447     }
 448 }
 449
 450 void InformationPanel::slotFileRenamed(const QString& source, const QString& dest)
 451 {
 452     if (m_shownUrl == KUrl(source)) {
 453         m_shownUrl = KUrl(dest);
 454         m_fileItem = KFileItem(KFileItem::Unknown, KFileItem::Unknown, m_shownUrl);
 455         showItemInfo();
 456     }
 457 }
 458
 459 void InformationPanel::slotFilesAdded(const QString& directory)
 460 {
 461     if (m_shownUrl == KUrl(directory)) {
 462         // If the 'trash' icon changes because the trash has been emptied or got filled,
 463         // the signal filesAdded("trash:/") will be emitted.
 464         KFileItem item(KFileItem::Unknown, KFileItem::Unknown, KUrl(directory));
 465         requestDelayedItemInfo(item);
 466     }
 467 }
 468
 469 void InformationPanel::slotFilesChanged(const QStringList& files)
 470 {
 471     foreach (const QString& fileName, files) {
 472         if (m_shownUrl == KUrl(fileName)) {
 473             showItemInfo();
 474             break;
 475         }
 476     }
 477 }
 478
 479 void InformationPanel::slotFilesRemoved(const QStringList& files)
 480 {
 481     foreach (const QString& fileName, files) {
 482         if (m_shownUrl == KUrl(fileName)) {
 483             // the currently shown item has been removed, show
 484             // the parent directory as fallback
 485             reset();
 486             break;
 487         }
 488     }
 489 }
 490
 491 void InformationPanel::slotEnteredDirectory(const QString& directory)
 492 {
 493     if (m_shownUrl == KUrl(directory)) {
 494         KFileItem item(KFileItem::Unknown, KFileItem::Unknown, KUrl(directory));
 495         requestDelayedItemInfo(item);
 496     }
 497 }
 498
 499 void InformationPanel::slotLeftDirectory(const QString& directory)
 500 {
 501     if (m_shownUrl == KUrl(directory)) {
 502         // The signal 'leftDirectory' is also emitted when a media
 503         // has been unmounted. In this case no directory change will be
 504         // done in Dolphin, but the Information Panel must be updated to
 505         // indicate an invalid directory.
 506         reset();
 507     }
 508 }
 509
 510 void InformationPanel::slotPlayingStarted()
 511 {
 512     m_preview->setVisible(m_phononWidget->mode() != PhononWidget::Video);
 513 }
 514
 515 void InformationPanel::slotPlayingStopped()
 516 {
 517     m_preview->setVisible(true);
 518 }
 519
 520 bool InformationPanel::applyPlace(const KUrl& url)
 521 {
 522     KFilePlacesModel* placesModel = DolphinSettings::instance().placesModel();
 523     int count = placesModel->rowCount();
 524
 525     for (int i = 0; i < count; ++i) {
 526         QModelIndex index = placesModel->index(i, 0);
 527
 528         if (url.equals(placesModel->url(index), KUrl::CompareWithoutTrailingSlash)) {
 529             setNameLabelText(placesModel->text(index));
 530             m_preview->setPixmap(placesModel->icon(index).pixmap(128, 128));
 531             return true;
 532         }
 533     }
 534
 535     return false;
 536 }
 537
 538 void InformationPanel::cancelRequest()
 539 {
 540     m_infoTimer->stop();
 541 }
 542
 543 void InformationPanel::showMetaInfo()
 544 {
 545     m_metaTextLabel->clear();
 546
 547     if (showMultipleSelectionInfo()) {
 548         if (m_metaDataWidget != 0) {
 549             KUrl::List urls;
 550             foreach (const KFileItem& item, m_selection) {
 551                 urls.append(item.targetUrl());
 552             }
 553             m_metaDataWidget->setFiles(urls);
 554         }
 555
 556         quint64 totalSize = 0;
 557         foreach (const KFileItem& item, m_selection) {
 558             // Only count the size of files, not dirs to match what
 559             // DolphinViewContainer::selectionStatusBarText() does.
 560             if (!item.isDir() && !item.isLink()) {
 561                 totalSize += item.size();
 562             }
 563         }
 564         m_metaTextLabel->add(i18nc("@label", "Total size:"), KIO::convertSize(totalSize));
 565     } else {
 566         const KFileItem item = fileItem();
 567         if (item.isDir()) {
 568             m_metaTextLabel->add(i18nc("@label", "Type:"), i18nc("@label", "Folder"));
 569             m_metaTextLabel->add(i18nc("@label", "Modified:"), item.timeString());
 570         } else {
 571             m_metaTextLabel->add(i18nc("@label", "Type:"), item.mimeComment());
 572
 573             m_metaTextLabel->add(i18nc("@label", "Size:"), KIO::convertSize(item.size()));
 574             m_metaTextLabel->add(i18nc("@label", "Modified:"), item.timeString());
 575
 576 #ifdef HAVE_NEPOMUK
 577             KConfig config("kmetainformationrc", KConfig::NoGlobals);
 578             KConfigGroup settings = config.group("Show");
 579             initMetaInfoSettings(settings);
 580
 581             Nepomuk::Resource res(item.url());
 582
 583             QHash<QUrl, Nepomuk::Variant> properties = res.properties();
 584             QHash<QUrl, Nepomuk::Variant>::const_iterator it = properties.constBegin();
 585             while (it != properties.constEnd()) {
 586                 Nepomuk::Types::Property prop(it.key());
 587                 if (settings.readEntry(prop.name(), true)) {
 588                     // TODO #1: use Nepomuk::formatValue(res, prop) if available
 589                     // instead of it.value().toString()
 590                     // TODO #2: using tunedLabel() is a workaround for KDE 4.3 until
 591                     // we get translated labels
 592                     m_metaTextLabel->add(tunedLabel(prop.label()) + ':', it.value().toString());
 593                 }
 594                 ++it;
 595             }
 596 #endif
 597         }
 598
 599         if (m_metaDataWidget != 0) {
 600             m_metaDataWidget->setFile(item.targetUrl());
 601         }
 602     }
 603
 604     updatePhononWidget();
 605 }
 606
 607 KFileItem InformationPanel::fileItem() const
 608 {
 609     if (!m_fileItem.isNull()) {
 610         return m_fileItem;
 611     }
 612
 613     if (!m_selection.isEmpty()) {
 614         Q_ASSERT(m_selection.count() == 1);
 615         return m_selection.first();
 616     }
 617
 618     // no item is hovered and no selection has been done: provide
 619     // an item for the directory represented by m_shownUrl
 620     KFileItem item(KFileItem::Unknown, KFileItem::Unknown, m_shownUrl);
 621     item.refresh();
 622     return item;
 623 }
 624
 625 bool InformationPanel::showMultipleSelectionInfo() const
 626 {
 627     return m_fileItem.isNull() && (m_selection.count() > 1);
 628 }
 629
 630 bool InformationPanel::isEqualToShownUrl(const KUrl& url) const
 631 {
 632     return m_shownUrl.equals(url, KUrl::CompareWithoutTrailingSlash);
 633 }
 634
 635 void InformationPanel::setNameLabelText(const QString& text)
 636 {
 637     QTextOption textOption;
 638     textOption.setWrapMode(QTextOption::WrapAtWordBoundaryOrAnywhere);
 639
 640     QTextLayout textLayout(text);
 641     textLayout.setFont(m_nameLabel->font());
 642     textLayout.setTextOption(textOption);
 643
 644     QString wrappedText;
 645     wrappedText.reserve(text.length());
 646
 647     // wrap the text to fit into the width of m_nameLabel
 648     textLayout.beginLayout();
 649     QTextLine line = textLayout.createLine();
 650     while (line.isValid()) {
 651         line.setLineWidth(m_nameLabel->width());
 652         wrappedText += text.mid(line.textStart(), line.textLength());
 653
 654         line = textLayout.createLine();
 655         if (line.isValid()) {
 656             wrappedText += QChar::LineSeparator;
 657         }
 658     }
 659     textLayout.endLayout();
 660
 661     m_nameLabel->setText(wrappedText);
 662 }
 663
 664 void InformationPanel::reset()
 665 {
 666     m_selection.clear();
 667     m_shownUrl = url();
 668     m_fileItem = KFileItem();
 669     showItemInfo();
 670 }
 671
 672 void InformationPanel::initMetaInfoSettings(KConfigGroup& group)
 673 {
 674     if (!group.readEntry("initialized", false)) {
 675         // The resource file is read the first time. Assure
 676         // that some meta information is disabled per default.
 677
 678         static const char* disabledProperties[] = {
 679             "asText", "contentSize", "depth", "fileExtension",
 680             "fileName", "fileSize", "isPartOf", "mimetype", "name",
 681             "parentUrl", "plainTextContent", "sourceModified",
 682             "size", "url",
 683             0 // mandatory last entry
 684         };
 685
 686         int i = 0;
 687         while (disabledProperties[i] != 0) {
 688             group.writeEntry(disabledProperties[i], false);
 689             ++i;
 690         }
 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 QString InformationPanel::tunedLabel(const QString& label) const
 728 {
 729     QString tunedLabel;
 730     const int labelLength = label.length();
 731     if (labelLength > 0) {
 732         tunedLabel.reserve(labelLength);
 733         tunedLabel = label[0].toUpper();
 734         for (int i = 1; i < labelLength; ++i) {
 735             if (label[i].isUpper() && !label[i - 1].isSpace() && !label[i - 1].isUpper()) {
 736                 tunedLabel += ' ';
 737                 tunedLabel += label[i].toLower();
 738             } else {
 739                 tunedLabel += label[i];
 740             }
 741         }
 742     }
 743     return tunedLabel;
 744 }
 745
 746 void InformationPanel::init()
 747 {
 748     m_infoTimer = new QTimer(this);
 749     m_infoTimer->setInterval(300);
 750     m_infoTimer->setSingleShot(true);
 751     connect(m_infoTimer, SIGNAL(timeout()),
 752             this, SLOT(slotInfoTimeout()));
 753
 754     // Initialize timer for disabling an outdated preview with a small
 755     // delay. This prevents flickering if the new preview can be generated
 756     // within a very small timeframe.
 757     m_outdatedPreviewTimer = new QTimer(this);
 758     m_outdatedPreviewTimer->setInterval(300);
 759     m_outdatedPreviewTimer->setSingleShot(true);
 760     connect(m_outdatedPreviewTimer, SIGNAL(timeout()),
 761             this, SLOT(markOutdatedPreview()));
 762
 763     QVBoxLayout* layout = new QVBoxLayout;
 764     layout->setSpacing(KDialog::spacingHint());
 765
 766     // name
 767     m_nameLabel = new QLabel(this);
 768     QFont font = m_nameLabel->font();
 769     font.setBold(true);
 770     m_nameLabel->setFont(font);
 771     m_nameLabel->setAlignment(Qt::AlignHCenter);
 772     m_nameLabel->setSizePolicy(QSizePolicy::Preferred, QSizePolicy::Fixed);
 773     m_nameLabel->setMaximumWidth(KIconLoader::SizeEnormous);
 774
 775     // preview
 776     const int minPreviewWidth = KIconLoader::SizeEnormous + KIconLoader::SizeMedium;
 777
 778     m_preview = new PixmapViewer(this);
 779     m_preview->setMinimumWidth(minPreviewWidth);
 780     m_preview->setMinimumHeight(KIconLoader::SizeEnormous);
 781
 782     m_phononWidget = new PhononWidget(this);
 783     m_phononWidget->setMinimumWidth(minPreviewWidth);
 784     connect(m_phononWidget, SIGNAL(playingStarted()),
 785             this, SLOT(slotPlayingStarted()));
 786     connect(m_phononWidget, SIGNAL(playingStopped()),
 787             this, SLOT(slotPlayingStopped()));
 788
 789     m_previewSeparator = new KSeparator(this);
 790
 791     const bool showPreview = InformationPanelSettings::showPreview();
 792     m_preview->setVisible(showPreview);
 793     m_previewSeparator->setVisible(showPreview);
 794
 795     if (MetaDataWidget::metaDataAvailable()) {
 796         // rating, comment and tags
 797         m_metaDataWidget = new MetaDataWidget(this);
 798         m_metaDataWidget->setSizePolicy(QSizePolicy::Preferred, QSizePolicy::Fixed);
 799         m_metaDataWidget->setMaximumWidth(KIconLoader::SizeEnormous);
 800
 801         const bool showRating  = InformationPanelSettings::showRating();
 802         const bool showComment = InformationPanelSettings::showComment();
 803         const bool showTags    = InformationPanelSettings::showTags();
 804
 805         m_metaDataWidget->setRatingVisible(showRating);
 806         m_metaDataWidget->setCommentVisible(showComment);
 807         m_metaDataWidget->setTagsVisible(showTags);
 808
 809         m_metaDataSeparator = new KSeparator(this);
 810         m_metaDataSeparator->setVisible(showRating || showComment || showTags);
 811     }
 812
 813     // general meta text information
 814     m_metaTextLabel = new MetaTextLabel(this);
 815     m_metaTextLabel->setSizePolicy(QSizePolicy::Preferred, QSizePolicy::Fixed);
 816
 817     m_metaTextArea = new QScrollArea(this);
 818     m_metaTextArea->setWidget(m_metaTextLabel);
 819     m_metaTextArea->setWidgetResizable(true);
 820     m_metaTextArea->setFrameShape(QFrame::NoFrame);
 821
 822     QWidget* viewport = m_metaTextArea->viewport();
 823     viewport->installEventFilter(this);
 824
 825     QPalette palette = viewport->palette();
 826     palette.setColor(viewport->backgroundRole(), QColor(Qt::transparent));
 827     viewport->setPalette(palette);
 828
 829     layout->addWidget(m_nameLabel);
 830     layout->addWidget(new KSeparator(this));
 831     layout->addWidget(m_preview);
 832     layout->addWidget(m_phononWidget);
 833     layout->addWidget(m_previewSeparator);
 834     if (m_metaDataWidget != 0) {
 835         layout->addWidget(m_metaDataWidget);
 836         layout->addWidget(m_metaDataSeparator);
 837     }
 838     layout->addWidget(m_metaTextArea);
 839     setLayout(layout);
 840
 841     org::kde::KDirNotify* dirNotify = new org::kde::KDirNotify(QString(), QString(),
 842                                                                QDBusConnection::sessionBus(), this);
 843     connect(dirNotify, SIGNAL(FileRenamed(QString, QString)), SLOT(slotFileRenamed(QString, QString)));
 844     connect(dirNotify, SIGNAL(FilesAdded(QString)), SLOT(slotFilesAdded(QString)));
 845     connect(dirNotify, SIGNAL(FilesChanged(QStringList)), SLOT(slotFilesChanged(QStringList)));
 846     connect(dirNotify, SIGNAL(FilesRemoved(QStringList)), SLOT(slotFilesRemoved(QStringList)));
 847     connect(dirNotify, SIGNAL(enteredDirectory(QString)), SLOT(slotEnteredDirectory(QString)));
 848     connect(dirNotify, SIGNAL(leftDirectory(QString)), SLOT(slotLeftDirectory(QString)));
 849
 850     m_initialized = true;
 851 }
 852
 853 #include "informationpanel.moc"