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     Panel::resizeEvent(event);
 211 }
 212
 213 bool InformationPanel::eventFilter(QObject* obj, QEvent* event)
 214 {
 215     // Check whether the size of the meta text area has changed and adjust
 216     // the fixed width in a way that no horizontal scrollbar needs to be shown.
 217     if ((obj == m_metaTextArea->viewport()) && (event->type() == QEvent::Resize)) {
 218         QResizeEvent* resizeEvent = static_cast<QResizeEvent*>(event);
 219         m_metaTextLabel->setFixedWidth(resizeEvent->size().width());
 220     }
 221     return Panel::eventFilter(obj, event);
 222 }
 223
 224 void InformationPanel::contextMenuEvent(QContextMenuEvent* event)
 225 {
 226     Panel::contextMenuEvent(event);
 227
 228 #ifdef HAVE_NEPOMUK
 229     if (showMultipleSelectionInfo()) {
 230         return;
 231     }
 232
 233     KMenu popup(this);
 234
 235     QAction* previewAction = popup.addAction(i18nc("@action:inmenu", "Preview"));
 236     previewAction->setIcon(KIcon("view-preview"));
 237     previewAction->setCheckable(true);
 238     previewAction->setChecked(InformationPanelSettings::showPreview());
 239
 240     const bool metaDataAvailable = MetaDataWidget::metaDataAvailable();
 241
 242     QAction* ratingAction = popup.addAction(i18nc("@action:inmenu", "Rating"));
 243     ratingAction->setIcon(KIcon("rating"));
 244     ratingAction->setCheckable(true);
 245     ratingAction->setChecked(InformationPanelSettings::showRating());
 246     ratingAction->setEnabled(metaDataAvailable);
 247
 248     QAction* commentAction = popup.addAction(i18nc("@action:inmenu", "Comment"));
 249     commentAction->setIcon(KIcon("text-plain"));
 250     commentAction->setCheckable(true);
 251     commentAction->setChecked(InformationPanelSettings::showComment());
 252     commentAction->setEnabled(metaDataAvailable);
 253
 254     QAction* tagsAction = popup.addAction(i18nc("@action:inmenu", "Tags"));
 255     tagsAction->setCheckable(true);
 256     tagsAction->setChecked(InformationPanelSettings::showTags());
 257     tagsAction->setEnabled(metaDataAvailable);
 258
 259     KConfig config("kmetainformationrc", KConfig::NoGlobals);
 260     KConfigGroup settings = config.group("Show");
 261     initMetaInfoSettings(settings);
 262
 263     QList<QAction*> actions;
 264
 265     // Get all meta information labels that are available for
 266     // the currently shown file item and add them to the popup.
 267     Nepomuk::Resource res(fileItem().url());
 268     QHash<QUrl, Nepomuk::Variant> properties = res.properties();
 269     QHash<QUrl, Nepomuk::Variant>::const_iterator it = properties.constBegin();
 270     while (it != properties.constEnd()) {
 271         Nepomuk::Types::Property prop(it.key());
 272         const QString key = prop.label();
 273
 274         // Meta information provided by Nepomuk that is already
 275         // available from KFileItem should not be configurable.
 276         bool skip = (key == "fileExtension") ||
 277                     (key == "name") ||
 278                     (key == "sourceModified") ||
 279                     (key == "size") ||
 280                     (key == "mime type");
 281         if (!skip) {
 282             // Check whether there is already a meta information
 283             // having the same label. In this case don't show it
 284             // twice in the menu.
 285             foreach (const QAction* action, actions) {
 286                 if (action->data().toString() == key) {
 287                     skip = true;
 288                     break;
 289                 }
 290             }
 291         }
 292
 293         if (!skip) {
 294             const QString label = key; // TODO
 295             QAction* action = new QAction(label, &popup);
 296             action->setCheckable(true);
 297             action->setChecked(settings.readEntry(key, true));
 298             action->setData(key);
 299             actions.append(action);
 300         }
 301
 302         ++it;
 303     }
 304
 305     if (actions.count() > 0) {
 306         popup.addSeparator();
 307
 308         // add all items alphabetically sorted to the popup
 309         qSort(actions.begin(), actions.end(), lessThan);
 310         foreach (QAction* action, actions) {
 311             popup.addAction(action);
 312         }
 313     }
 314
 315     // Open the popup and adjust the settings for the
 316     // selected action.
 317     QAction* action = popup.exec(QCursor::pos());
 318     if (action == 0) {
 319         return;
 320     }
 321
 322     const bool isChecked = action->isChecked();
 323     if (action == previewAction) {
 324         m_preview->setVisible(isChecked);
 325         m_previewSeparator->setVisible(isChecked);
 326         InformationPanelSettings::setShowPreview(isChecked);
 327         updatePhononWidget();
 328     } else if (action == ratingAction) {
 329         m_metaDataWidget->setRatingVisible(isChecked);
 330         InformationPanelSettings::setShowRating(isChecked);
 331     } else if (action == commentAction) {
 332         m_metaDataWidget->setCommentVisible(isChecked);
 333         InformationPanelSettings::setShowComment(isChecked);
 334     } else if (action == tagsAction) {
 335         m_metaDataWidget->setTagsVisible(isChecked);
 336         InformationPanelSettings::setShowTags(isChecked);
 337     } else {
 338         settings.writeEntry(action->data().toString(), action->isChecked());
 339         settings.sync();
 340         showMetaInfo();
 341     }
 342
 343     const bool visible = m_metaDataWidget->isRatingVisible() ||
 344                          m_metaDataWidget->isCommentVisible() ||
 345                          m_metaDataWidget->areTagsVisible();
 346     m_metaDataSeparator->setVisible(visible);
 347 #endif
 348 }
 349
 350 void InformationPanel::showItemInfo()
 351 {
 352     if (!isVisible()) {
 353         return;
 354     }
 355
 356     cancelRequest();
 357
 358     if (showMultipleSelectionInfo()) {
 359         KIconLoader iconLoader;
 360         QPixmap icon = iconLoader.loadIcon("dialog-information",
 361                                            KIconLoader::NoGroup,
 362                                            KIconLoader::SizeEnormous);
 363         m_preview->setPixmap(icon);
 364         setNameLabelText(i18ncp("@info", "%1 item selected", "%1 items selected",  m_selection.count()));
 365         m_shownUrl = KUrl();
 366     } else {
 367         const KFileItem item = fileItem();
 368         const KUrl itemUrl = item.url();
 369         if (!applyPlace(itemUrl)) {
 370             // try to get a preview pixmap from the item...
 371             m_pendingPreview = true;
 372
 373             // Mark the currently shown preview as outdated. This is done
 374             // with a small delay to prevent a flickering when the next preview
 375             // can be shown within a short timeframe.
 376             m_outdatedPreviewTimer->start();
 377
 378             KIO::PreviewJob* job = KIO::filePreview(KFileItemList() << item,
 379                                                     m_preview->width(),
 380                                                     m_preview->height(),
 381                                                     0,
 382                                                     0,
 383                                                     false,
 384                                                     true);
 385
 386             connect(job, SIGNAL(gotPreview(const KFileItem&, const QPixmap&)),
 387                     this, SLOT(showPreview(const KFileItem&, const QPixmap&)));
 388             connect(job, SIGNAL(failed(const KFileItem&)),
 389                     this, SLOT(showIcon(const KFileItem&)));
 390
 391             setNameLabelText(itemUrl.fileName());
 392         }
 393     }
 394
 395     showMetaInfo();
 396 }
 397
 398 void InformationPanel::slotInfoTimeout()
 399 {
 400     m_shownUrl = m_urlCandidate;
 401     showItemInfo();
 402 }
 403
 404 void InformationPanel::markOutdatedPreview()
 405 {
 406     KIconEffect iconEffect;
 407     QPixmap disabledPixmap = iconEffect.apply(m_preview->pixmap(),
 408                                               KIconLoader::Desktop,
 409                                               KIconLoader::DisabledState);
 410     m_preview->setPixmap(disabledPixmap);
 411 }
 412
 413 void InformationPanel::showIcon(const KFileItem& item)
 414 {
 415     m_outdatedPreviewTimer->stop();
 416     m_pendingPreview = false;
 417     if (!applyPlace(item.url())) {
 418         m_preview->setPixmap(item.pixmap(KIconLoader::SizeEnormous));
 419     }
 420 }
 421
 422 void InformationPanel::showPreview(const KFileItem& item,
 423                                   const QPixmap& pixmap)
 424 {
 425     m_outdatedPreviewTimer->stop();
 426
 427     Q_UNUSED(item);
 428     if (m_pendingPreview) {
 429         m_preview->setPixmap(pixmap);
 430         m_pendingPreview = false;
 431     }
 432 }
 433
 434 void InformationPanel::slotFileRenamed(const QString& source, const QString& dest)
 435 {
 436     const KUrl sourceUrl = KUrl(source);
 437
 438     // Verify whether the renamed item is selected. If this is the case, the
 439     // selection must be updated with the renamed item.
 440     bool isSelected = false;
 441     for (int i = m_selection.size() - 1; i >= 0; --i) {
 442         if (m_selection[i].url() == sourceUrl) {
 443             m_selection.removeAt(i);
 444             isSelected = true;
 445             break;
 446         }
 447     }
 448
 449     if ((m_shownUrl == sourceUrl) || isSelected) {
 450         m_shownUrl = KUrl(dest);
 451         m_fileItem = KFileItem(KFileItem::Unknown, KFileItem::Unknown, m_shownUrl);
 452         if (isSelected) {
 453             m_selection.append(m_fileItem);
 454         }
 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                 const QString label = prop.label();
 588                 if (settings.readEntry(label, true)) {
 589                     // TODO: use Nepomuk::formatValue(res, prop) if available
 590                     // instead of it.value().toString()
 591                     m_metaTextLabel->add(label, it.value().toString());
 592                 }
 593                 ++it;
 594             }
 595 #endif
 596         }
 597
 598         if (m_metaDataWidget != 0) {
 599             m_metaDataWidget->setFile(item.targetUrl());
 600         }
 601     }
 602
 603     updatePhononWidget();
 604 }
 605
 606 KFileItem InformationPanel::fileItem() const
 607 {
 608     if (!m_fileItem.isNull()) {
 609         return m_fileItem;
 610     }
 611
 612     if (!m_selection.isEmpty()) {
 613         Q_ASSERT(m_selection.count() == 1);
 614         return m_selection.first();
 615     }
 616
 617     // no item is hovered and no selection has been done: provide
 618     // an item for the directory represented by m_shownUrl
 619     KFileItem item(KFileItem::Unknown, KFileItem::Unknown, m_shownUrl);
 620     item.refresh();
 621     return item;
 622 }
 623
 624 bool InformationPanel::showMultipleSelectionInfo() const
 625 {
 626     return m_fileItem.isNull() && (m_selection.count() > 1);
 627 }
 628
 629 bool InformationPanel::isEqualToShownUrl(const KUrl& url) const
 630 {
 631     return m_shownUrl.equals(url, KUrl::CompareWithoutTrailingSlash);
 632 }
 633
 634 void InformationPanel::setNameLabelText(const QString& text)
 635 {
 636     QTextOption textOption;
 637     textOption.setWrapMode(QTextOption::WrapAtWordBoundaryOrAnywhere);
 638
 639     QTextLayout textLayout(text);
 640     textLayout.setFont(m_nameLabel->font());
 641     textLayout.setTextOption(textOption);
 642
 643     QString wrappedText;
 644     wrappedText.reserve(text.length());
 645
 646     // wrap the text to fit into the width of m_nameLabel
 647     textLayout.beginLayout();
 648     QTextLine line = textLayout.createLine();
 649     while (line.isValid()) {
 650         line.setLineWidth(m_nameLabel->width());
 651         wrappedText += text.mid(line.textStart(), line.textLength());
 652
 653         line = textLayout.createLine();
 654         if (line.isValid()) {
 655             wrappedText += QChar::LineSeparator;
 656         }
 657     }
 658     textLayout.endLayout();
 659
 660     m_nameLabel->setText(wrappedText);
 661 }
 662
 663 void InformationPanel::reset()
 664 {
 665     m_selection.clear();
 666     m_shownUrl = url();
 667     m_fileItem = KFileItem();
 668     showItemInfo();
 669 }
 670
 671 void InformationPanel::initMetaInfoSettings(KConfigGroup& group)
 672 {
 673     if (!group.readEntry("initialized", false)) {
 674         // The resource file is read the first time. Assure
 675         // that some meta information is disabled per default.
 676         group.writeEntry("fileExtension", false);
 677         group.writeEntry("url", false);
 678         group.writeEntry("sourceModified", false);
 679         group.writeEntry("parentUrl", false);
 680         group.writeEntry("size", false);
 681         group.writeEntry("mime type", false);
 682         group.writeEntry("depth", false);
 683         group.writeEntry("name", false);
 684
 685         // mark the group as initialized
 686         group.writeEntry("initialized", true);
 687     }
 688 }
 689
 690 void InformationPanel::updatePhononWidget()
 691 {
 692     const bool multipleSelections = showMultipleSelectionInfo();
 693     const bool showPreview = InformationPanelSettings::showPreview();
 694
 695     if (multipleSelections || !showPreview) {
 696         m_phononWidget->hide();
 697     } else if (!multipleSelections && showPreview) {
 698         const KFileItem item = fileItem();
 699         const QString mimeType = item.mimetype();
 700         if (Phonon::BackendCapabilities::isMimeTypeAvailable(mimeType)) {
 701             m_phononWidget->show();
 702             PhononWidget::Mode mode = mimeType.startsWith("video")
 703                                       ? PhononWidget::Video
 704                                       : PhononWidget::Audio;
 705             m_phononWidget->setMode(mode);
 706             m_phononWidget->setUrl(item.url());
 707         } else {
 708             m_phononWidget->hide();
 709             m_preview->setVisible(true);
 710         }
 711     }
 712 }
 713
 714 void InformationPanel::init()
 715 {
 716     const int spacing = KDialog::spacingHint();
 717
 718     m_infoTimer = new QTimer(this);
 719     m_infoTimer->setInterval(300);
 720     m_infoTimer->setSingleShot(true);
 721     connect(m_infoTimer, SIGNAL(timeout()),
 722             this, SLOT(slotInfoTimeout()));
 723
 724     // Initialize timer for disabling an outdated preview with a small
 725     // delay. This prevents flickering if the new preview can be generated
 726     // within a very small timeframe.
 727     m_outdatedPreviewTimer = new QTimer(this);
 728     m_outdatedPreviewTimer->setInterval(300);
 729     m_outdatedPreviewTimer->setSingleShot(true);
 730     connect(m_outdatedPreviewTimer, SIGNAL(timeout()),
 731             this, SLOT(markOutdatedPreview()));
 732
 733     QVBoxLayout* layout = new QVBoxLayout;
 734     layout->setSpacing(spacing);
 735
 736     // name
 737     m_nameLabel = new QLabel(this);
 738     QFont font = m_nameLabel->font();
 739     font.setBold(true);
 740     m_nameLabel->setFont(font);
 741     m_nameLabel->setAlignment(Qt::AlignHCenter);
 742     m_nameLabel->setSizePolicy(QSizePolicy::Preferred, QSizePolicy::Fixed);
 743
 744     // preview
 745     m_preview = new PixmapViewer(this);
 746     m_preview->setMinimumWidth(KIconLoader::SizeEnormous + KIconLoader::SizeMedium);
 747     m_preview->setMinimumHeight(KIconLoader::SizeEnormous);
 748
 749     m_phononWidget = new PhononWidget(this);
 750     connect(m_phononWidget, SIGNAL(playingStarted()),
 751             this, SLOT(slotPlayingStarted()));
 752     connect(m_phononWidget, SIGNAL(playingStopped()),
 753             this, SLOT(slotPlayingStopped()));
 754
 755     m_previewSeparator = new KSeparator(this);
 756
 757     const bool showPreview = InformationPanelSettings::showPreview();
 758     m_preview->setVisible(showPreview);
 759     m_previewSeparator->setVisible(showPreview);
 760
 761     if (MetaDataWidget::metaDataAvailable()) {
 762         // rating, comment and tags
 763         m_metaDataWidget = new MetaDataWidget(this);
 764         m_metaDataWidget->setSizePolicy(QSizePolicy::Preferred, QSizePolicy::Fixed);
 765
 766         const bool showRating  = InformationPanelSettings::showRating();
 767         const bool showComment = InformationPanelSettings::showComment();
 768         const bool showTags    = InformationPanelSettings::showTags();
 769
 770         m_metaDataWidget->setRatingVisible(showRating);
 771         m_metaDataWidget->setCommentVisible(showComment);
 772         m_metaDataWidget->setTagsVisible(showTags);
 773
 774         m_metaDataSeparator = new KSeparator(this);
 775         m_metaDataSeparator->setVisible(showRating || showComment || showTags);
 776     }
 777
 778     // general meta text information
 779     m_metaTextLabel = new MetaTextLabel(this);
 780     m_metaTextLabel->setSizePolicy(QSizePolicy::Preferred, QSizePolicy::Fixed);
 781
 782     m_metaTextArea = new QScrollArea(this);
 783     m_metaTextArea->setWidget(m_metaTextLabel);
 784     m_metaTextArea->setWidgetResizable(true);
 785     m_metaTextArea->setFrameShape(QFrame::NoFrame);
 786
 787     QWidget* viewport = m_metaTextArea->viewport();
 788     viewport->installEventFilter(this);
 789
 790     QPalette palette = viewport->palette();
 791     palette.setColor(viewport->backgroundRole(), QColor(Qt::transparent));
 792     viewport->setPalette(palette);
 793
 794     layout->addWidget(m_nameLabel);
 795     layout->addWidget(new KSeparator(this));
 796     layout->addWidget(m_preview);
 797     layout->addWidget(m_phononWidget);
 798     layout->addWidget(m_previewSeparator);
 799     if (m_metaDataWidget != 0) {
 800         layout->addWidget(m_metaDataWidget);
 801         layout->addWidget(m_metaDataSeparator);
 802     }
 803     layout->addWidget(m_metaTextArea);
 804     setLayout(layout);
 805
 806     org::kde::KDirNotify* dirNotify = new org::kde::KDirNotify(QString(), QString(),
 807                                                                QDBusConnection::sessionBus(), this);
 808     connect(dirNotify, SIGNAL(FileRenamed(QString, QString)), SLOT(slotFileRenamed(QString, QString)));
 809     connect(dirNotify, SIGNAL(FilesAdded(QString)), SLOT(slotFilesAdded(QString)));
 810     connect(dirNotify, SIGNAL(FilesChanged(QStringList)), SLOT(slotFilesChanged(QStringList)));
 811     connect(dirNotify, SIGNAL(FilesRemoved(QStringList)), SLOT(slotFilesRemoved(QStringList)));
 812     connect(dirNotify, SIGNAL(enteredDirectory(QString)), SLOT(slotEnteredDirectory(QString)));
 813     connect(dirNotify, SIGNAL(leftDirectory(QString)), SLOT(slotLeftDirectory(QString)));
 814
 815     m_initialized = true;
 816 }
 817
 818 #include "informationpanel.moc"