[InformationPanel] Hide the video when the preview is disabled, avoid computing the...

[dolphin.git] / src / panels / information / informationpanel.cpp

diff --git a/src/panels/information/informationpanel.cpp b/src/panels/information/informationpanel.cpp
index 1b8724f46568c566b529d0b542e81d2fe5d999e4..e5257bc72556839db0e55fa3570a98ffaaf92302 100644 (file)
--- a/src/panels/information/informationpanel.cpp
+++ b/src/panels/information/informationpanel.cpp
@@ -1,5 +1,5 @@
 /***************************************************************************
 /***************************************************************************

- *   Copyright (C) 2006 by Peter Penz <peter.penz@gmx.at>                  *
+ *   Copyright (C) 2006-2009 by Peter Penz <peter.penz19@gmail.com>        *

  *                                                                         *
  *   This program is free software; you can redistribute it and/or modify  *
  *   it under the terms of the GNU General Public License as published by  *
  *                                                                         *
  *   This program is free software; you can redistribute it and/or modify  *
  *   it under the terms of the GNU General Public License as published by  *


@@ -19,124 +19,54 @@
 
 #include "informationpanel.h"
 
 
 #include "informationpanel.h"
 

-#include <config-nepomuk.h>
-
-#include <kdialog.h>
-#include <kdirnotify.h>
-#include <kfileitem.h>
-#include <kfilemetainfo.h>
-#include <kfileplacesmodel.h>
-#include <kglobalsettings.h>
-#include <kio/previewjob.h>
-#include <kiconeffect.h>
-#include <kiconloader.h>
-#include <klocale.h>
-#include <kmenu.h>
-#include <kseparator.h>
-
-#ifdef HAVE_NEPOMUK
-#include <Nepomuk/Resource>
-#include <Nepomuk/Types/Property>
-#include <Nepomuk/Variant>
-#endif
-
-#include <Phonon/BackendCapabilities>
-#include <Phonon/MediaObject>
-#include <Phonon/SeekSlider>
-
-#include <QEvent>
-#include <QInputDialog>
-#include <QLabel>
-#include <QPainter>
-#include <QPixmap>
-#include <QResizeEvent>
-#include <QScrollArea>
-#include <QTextLayout>
-#include <QTextLine>
-#include <QTimer>
-#include <QScrollBar>
+#include "informationpanelcontent.h"
+
+#include <KIO/Job>
+#include <KIO/JobUiDelegate>
+#include <KJobWidgets>
+#include <KDirNotify>
+#include <KLocalizedString>
+
+#include <Baloo/FileMetaDataWidget>
+
+#include <QApplication>
+#include <QShowEvent>

 #include <QVBoxLayout>
 #include <QVBoxLayout>

+#include <QTimer>
+#include <QMenu>

 
 #include "dolphin_informationpanelsettings.h"
 
 #include "dolphin_informationpanelsettings.h"

-#include "settings/dolphinsettings.h"
-#include "metadatawidget.h"
-#include "metatextlabel.h"
-#include "phononwidget.h"
-#include "pixmapviewer.h"
-
-/**
- * Helper function for sorting items with qSort() in
- * InformationPanel::contextMenu().
- */
-bool lessThan(const QAction* action1, const QAction* action2)
-{
-    return action1->text() < action2->text();
-}
-
+#include "filemetadataconfigurationdialog.h"

 
 InformationPanel::InformationPanel(QWidget* parent) :
     Panel(parent),
     m_initialized(false),
 
 InformationPanel::InformationPanel(QWidget* parent) :
     Panel(parent),
     m_initialized(false),

-    m_pendingPreview(false),
-    m_infoTimer(0),
-    m_outdatedPreviewTimer(0),
+    m_infoTimer(nullptr),
+    m_urlChangedTimer(nullptr),
+    m_resetUrlTimer(nullptr),

     m_shownUrl(),
     m_urlCandidate(),
     m_shownUrl(),
     m_urlCandidate(),

+    m_invalidUrlCandidate(),

     m_fileItem(),
     m_selection(),
     m_fileItem(),
     m_selection(),

-    m_nameLabel(0),
-    m_preview(0),
-    m_previewSeparator(0),
-    m_phononWidget(0),
-    m_metaDataWidget(0),
-    m_metaDataSeparator(0),
-    m_metaTextArea(0),
-    m_metaTextLabel(0)
+    m_folderStatJob(nullptr),
+    m_content(nullptr)

 {
 }
 
 InformationPanel::~InformationPanel()
 {
 {
 }
 
 InformationPanel::~InformationPanel()
 {

-    InformationPanelSettings::self()->writeConfig();
-}
-
-QSize InformationPanel::sizeHint() const
-{
-    QSize size = Panel::sizeHint();
-    size.setWidth(minimumSizeHint().width());
-    return size;
-}
-
-void InformationPanel::setUrl(const KUrl& url)
-{
-    Panel::setUrl(url);
-    if (url.isValid() && !isEqualToShownUrl(url)) {
-        if (isVisible()) {
-            cancelRequest();
-            m_shownUrl = url;
-            showItemInfo();
-        } else {
-            m_shownUrl = url;
-        }
-    }

 }
 
 void InformationPanel::setSelection(const KFileItemList& selection)
 {
 }
 
 void InformationPanel::setSelection(const KFileItemList& selection)
 {

-    if (!isVisible()) {
-        return;
-    }
+    m_selection = selection;
+    m_fileItem = KFileItem();

 
 

-    if ((selection.count() == 0) && (m_selection.count() == 0)) {
-        // The selection has not really changed, only the current index.
-        // QItemSelectionModel emits a signal in this case and it is less
-        // expensive doing the check this way instead of patching
-        // DolphinView::emitSelectionChanged().
+    if (!isVisible()) {

         return;
     }
 
         return;
     }
 

-    m_selection = selection;
-

     const int count = selection.count();
     if (count == 0) {
         if (!isEqualToShownUrl(url())) {
     const int count = selection.count();
     if (count == 0) {
         if (!isEqualToShownUrl(url())) {


@@ -153,28 +83,58 @@ void InformationPanel::setSelection(const KFileItemList& selection)
 
 void InformationPanel::requestDelayedItemInfo(const KFileItem& item)
 {
 
 void InformationPanel::requestDelayedItemInfo(const KFileItem& item)
 {

-    if (!isVisible()) {
+    if (!isVisible() || (item.isNull() && m_fileItem.isNull())) {
+        return;
+    }
+
+    if (QApplication::mouseButtons() & Qt::LeftButton) {
+        // Ignore the request of an item information when a rubberband
+        // selection is ongoing.

         return;
     }
 
     cancelRequest();
 
         return;
     }
 
     cancelRequest();
 

-    m_fileItem = KFileItem();

     if (item.isNull()) {
         // The cursor is above the viewport. If files are selected,
         // show information regarding the selection.
     if (item.isNull()) {
         // The cursor is above the viewport. If files are selected,
         // show information regarding the selection.

-        if (m_selection.size() > 0) {
-            m_pendingPreview = false;
-            m_infoTimer->start();
-        }
-    } else {
-        const KUrl url = item.url();
-        if (url.isValid() && !isEqualToShownUrl(url)) {
-            m_urlCandidate = item.url();
-            m_fileItem = item;
+        if (!m_selection.isEmpty()) {
+            m_fileItem = KFileItem();

             m_infoTimer->start();
         }
             m_infoTimer->start();
         }

+    } else if (item.url().isValid() && !isEqualToShownUrl(item.url())) {
+        // The cursor is above an item that is not shown currently
+        m_urlCandidate = item.url();
+        m_fileItem = item;
+        m_infoTimer->start();
+    }
+}
+
+bool InformationPanel::urlChanged()
+{
+    if (!url().isValid()) {
+        return false;

     }
     }

+
+    if (!isVisible()) {
+        return true;
+    }
+
+    cancelRequest();
+    m_selection.clear();
+
+    if (!isEqualToShownUrl(url())) {
+        m_shownUrl = url();
+        m_fileItem = KFileItem();
+
+        // Update the content with a delay. This gives
+        // the directory lister the chance to show the content
+        // before expensive operations are done to show
+        // meta information.
+        m_urlChangedTimer->start();
+    }
+
+    return true;

 }
 
 void InformationPanel::showEvent(QShowEvent* event)
 }
 
 void InformationPanel::showEvent(QShowEvent* event)


@@ -187,6 +147,8 @@ void InformationPanel::showEvent(QShowEvent* event)
             // Information Panel
             init();
         }
             // Information Panel
             init();
         }

+
+        m_shownUrl = url();

         showItemInfo();
     }
 }
         showItemInfo();
     }
 }


@@ -194,162 +156,66 @@ void InformationPanel::showEvent(QShowEvent* event)
 void InformationPanel::resizeEvent(QResizeEvent* event)
 {
     if (isVisible()) {
 void InformationPanel::resizeEvent(QResizeEvent* event)
 {
     if (isVisible()) {

-        // If the text inside the name label or the info label cannot
-        // get wrapped, then the maximum width of the label is increased
-        // so that the width of the information panel gets increased.
-        // To prevent this, the maximum width is adjusted to
-        // the current width of the panel.
-        const int maxWidth = event->size().width() - KDialog::spacingHint() * 4;
-        m_nameLabel->setMaximumWidth(maxWidth);
-
-        // try to increase the preview as large as possible
-        m_preview->setSizeHint(QSize(maxWidth, maxWidth));
-        m_urlCandidate = m_shownUrl; // reset the URL candidate if a resizing is done
+        m_urlCandidate = m_shownUrl;

         m_infoTimer->start();
         m_infoTimer->start();

-
-        if (m_phononWidget->isVisible() && (m_phononWidget->mode() == PhononWidget::Video)) {
-            // assure that the size of the video player is the same as the preview size
-            m_phononWidget->setVideoSize(QSize(maxWidth, maxWidth));
-        }

     }
     Panel::resizeEvent(event);
 }
 
     }
     Panel::resizeEvent(event);
 }
 

-bool InformationPanel::eventFilter(QObject* obj, QEvent* event)
-{
-    // Check whether the size of the meta text area has changed and adjust
-    // the fixed width in a way that no horizontal scrollbar needs to be shown.
-    if ((obj == m_metaTextArea->viewport()) && (event->type() == QEvent::Resize)) {
-        QResizeEvent* resizeEvent = static_cast<QResizeEvent*>(event);
-        m_metaTextLabel->setFixedWidth(resizeEvent->size().width());
-    }
-    return Panel::eventFilter(obj, event);
-}
-

 void InformationPanel::contextMenuEvent(QContextMenuEvent* event)
 {
 void InformationPanel::contextMenuEvent(QContextMenuEvent* event)
 {

+    showContextMenu(event->globalPos());

     Panel::contextMenuEvent(event);
     Panel::contextMenuEvent(event);

+}

 
 

-#ifdef HAVE_NEPOMUK
-    if (showMultipleSelectionInfo()) {
-        return;
-    }
-
-    KMenu popup(this);
+void InformationPanel::showContextMenu(const QPoint &pos) {
+    QMenu popup(this);

 
     QAction* previewAction = popup.addAction(i18nc("@action:inmenu", "Preview"));
 
     QAction* previewAction = popup.addAction(i18nc("@action:inmenu", "Preview"));

-    previewAction->setIcon(KIcon("view-preview"));
+    previewAction->setIcon(QIcon::fromTheme(QStringLiteral("view-preview")));

     previewAction->setCheckable(true);
     previewAction->setCheckable(true);

-    previewAction->setChecked(InformationPanelSettings::showPreview());
-
-    const bool metaDataAvailable = MetaDataWidget::metaDataAvailable();
-
-    QAction* ratingAction = popup.addAction(i18nc("@action:inmenu", "Rating"));
-    ratingAction->setIcon(KIcon("rating"));
-    ratingAction->setCheckable(true);
-    ratingAction->setChecked(InformationPanelSettings::showRating());
-    ratingAction->setEnabled(metaDataAvailable);
-
-    QAction* commentAction = popup.addAction(i18nc("@action:inmenu", "Comment"));
-    commentAction->setIcon(KIcon("text-plain"));
-    commentAction->setCheckable(true);
-    commentAction->setChecked(InformationPanelSettings::showComment());
-    commentAction->setEnabled(metaDataAvailable);
-
-    QAction* tagsAction = popup.addAction(i18nc("@action:inmenu", "Tags"));
-    tagsAction->setCheckable(true);
-    tagsAction->setChecked(InformationPanelSettings::showTags());
-    tagsAction->setEnabled(metaDataAvailable);
-
-    KConfig config("kmetainformationrc", KConfig::NoGlobals);
-    KConfigGroup settings = config.group("Show");
-    initMetaInfoSettings(settings);
-
-    QList<QAction*> actions;
-
-    // Get all meta information labels that are available for
-    // the currently shown file item and add them to the popup.
-    Nepomuk::Resource res(fileItem().url());
-    QHash<QUrl, Nepomuk::Variant> properties = res.properties();
-    QHash<QUrl, Nepomuk::Variant>::const_iterator it = properties.constBegin();
-    while (it != properties.constEnd()) {
-        Nepomuk::Types::Property prop(it.key());
-        const QString key = prop.label();
-
-        // Meta information provided by Nepomuk that is already
-        // available from KFileItem should not be configurable.
-        bool skip = (key == "fileExtension") ||
-                    (key == "name") ||
-                    (key == "sourceModified") ||
-                    (key == "size") ||
-                    (key == "mime type");
-        if (!skip) {
-            // Check whether there is already a meta information
-            // having the same label. In this case don't show it
-            // twice in the menu.
-            foreach (const QAction* action, actions) {
-                if (action->data().toString() == key) {
-                    skip = true;
-                    break;
-                }
-            }
-        }
-
-        if (!skip) {
-            const QString label = key; // TODO
-            QAction* action = new QAction(label, &popup);
-            action->setCheckable(true);
-            action->setChecked(settings.readEntry(key, true));
-            action->setData(key);
-            actions.append(action);
-        }
+    previewAction->setChecked(InformationPanelSettings::previewsShown());

 
 

-        ++it;
-    }
+    QAction* configureAction = popup.addAction(i18nc("@action:inmenu", "Configure..."));
+    configureAction->setIcon(QIcon::fromTheme(QStringLiteral("configure")));

 
 

-    if (actions.count() > 0) {
-        popup.addSeparator();
+    QAction* dateformatAction = popup.addAction(i18nc("@action:inmenu", "Condensed Date"));
+    dateformatAction->setIcon(QIcon::fromTheme(QStringLiteral("change-date-symbolic")));
+    dateformatAction->setCheckable(true);
+    dateformatAction->setChecked(InformationPanelSettings::dateFormat() == static_cast<int>(Baloo::DateFormats::ShortFormat));

 
 

-        // add all items alphabetically sorted to the popup
-        qSort(actions.begin(), actions.end(), lessThan);
-        foreach (QAction* action, actions) {
-            popup.addAction(action);
-        }
+    popup.addSeparator();
+    const auto actions = customContextMenuActions();
+    for (QAction *action : actions) {
+        popup.addAction(action);

     }
 
     // Open the popup and adjust the settings for the
     // selected action.
     }
 
     // Open the popup and adjust the settings for the
     // selected action.

-    QAction* action = popup.exec(QCursor::pos());
-    if (action == 0) {
+    QAction* action = popup.exec(pos);
+    if (!action) {

         return;
     }
 
     const bool isChecked = action->isChecked();
     if (action == previewAction) {
         return;
     }
 
     const bool isChecked = action->isChecked();
     if (action == previewAction) {

-        m_preview->setVisible(isChecked);
-        m_previewSeparator->setVisible(isChecked);
-        InformationPanelSettings::setShowPreview(isChecked);
-        updatePhononWidget();
-    } else if (action == ratingAction) {
-        m_metaDataWidget->setRatingVisible(isChecked);
-        InformationPanelSettings::setShowRating(isChecked);
-    } else if (action == commentAction) {
-        m_metaDataWidget->setCommentVisible(isChecked);
-        InformationPanelSettings::setShowComment(isChecked);
-    } else if (action == tagsAction) {
-        m_metaDataWidget->setTagsVisible(isChecked);
-        InformationPanelSettings::setShowTags(isChecked);
-    } else {
-        settings.writeEntry(action->data().toString(), action->isChecked());
-        settings.sync();
-        showMetaInfo();
+        InformationPanelSettings::setPreviewsShown(isChecked);
+        m_content->refreshPreview();
+    } else if (action == configureAction) {
+        FileMetaDataConfigurationDialog* dialog = new FileMetaDataConfigurationDialog(this);
+        dialog->setDescription(i18nc("@label::textbox",
+                                     "Select which data should be shown in the information panel:"));
+        dialog->setItems(m_content->items());
+        dialog->setAttribute(Qt::WA_DeleteOnClose);
+        dialog->show();
+        connect(dialog, &FileMetaDataConfigurationDialog::destroyed, m_content, &InformationPanelContent::refreshMetaData);

     }
     }

+    if (action == dateformatAction) {
+        int dateFormat = static_cast<int>(isChecked ? Baloo::DateFormats::ShortFormat : Baloo::DateFormats::LongFormat);

 
 

-    const bool visible = m_metaDataWidget->isRatingVisible() ||
-                         m_metaDataWidget->isCommentVisible() ||
-                         m_metaDataWidget->areTagsVisible();
-    m_metaDataSeparator->setVisible(visible);
-#endif
+        InformationPanelSettings::setDateFormat(dateFormat);
+        m_content->refreshMetaData();
+    }

 }
 
 void InformationPanel::showItemInfo()
 }
 
 void InformationPanel::showItemInfo()


@@ -360,121 +226,94 @@ void InformationPanel::showItemInfo()
 
     cancelRequest();
 
 
     cancelRequest();
 

-    if (showMultipleSelectionInfo()) {
-        KIconLoader iconLoader;
-        QPixmap icon = iconLoader.loadIcon("dialog-information",
-                                           KIconLoader::NoGroup,
-                                           KIconLoader::SizeEnormous);
-        m_preview->setPixmap(icon);
-        setNameLabelText(i18ncp("@info", "%1 item selected", "%1 items selected",  m_selection.count()));
-        m_shownUrl = KUrl();
+    if (m_fileItem.isNull() && (m_selection.count() > 1)) {
+        // The information for a selection of items should be shown
+        m_content->showItems(m_selection);

     } else {
     } else {

-        const KFileItem item = fileItem();
-        const KUrl itemUrl = item.url();
-        if (!applyPlace(itemUrl)) {
-            // try to get a preview pixmap from the item...
-            m_pendingPreview = true;
-
-            // Mark the currently shown preview as outdated. This is done
-            // with a small delay to prevent a flickering when the next preview
-            // can be shown within a short timeframe.
-            m_outdatedPreviewTimer->start();
-
-            KIO::PreviewJob* job = KIO::filePreview(KFileItemList() << item,
-                                                    m_preview->width(),
-                                                    m_preview->height(),
-                                                    0,
-                                                    0,
-                                                    false,
-                                                    true);
-
-            connect(job, SIGNAL(gotPreview(const KFileItem&, const QPixmap&)),
-                    this, SLOT(showPreview(const KFileItem&, const QPixmap&)));
-            connect(job, SIGNAL(failed(const KFileItem&)),
-                    this, SLOT(showIcon(const KFileItem&)));
-
-            setNameLabelText(itemUrl.fileName());
+        // The information for exactly one item should be shown
+        KFileItem item;
+        if (!m_fileItem.isNull()) {
+            item = m_fileItem;
+        } else if (!m_selection.isEmpty()) {
+            Q_ASSERT(m_selection.count() == 1);
+            item = m_selection.first();
+        }
+
+        if (item.isNull()) {
+            // No item is hovered and no selection has been done: provide
+            // an item for the currently shown directory.
+            m_folderStatJob = KIO::stat(url(), KIO::HideProgressInfo);
+            if (m_folderStatJob->uiDelegate()) {
+                KJobWidgets::setWindow(m_folderStatJob, this);
+            }
+            connect(m_folderStatJob, &KIO::Job::result,
+                    this, &InformationPanel::slotFolderStatFinished);
+        } else {
+            m_content->showItem(item);

         }
     }
         }
     }

+}

 
 

-    showMetaInfo();
+void InformationPanel::slotFolderStatFinished(KJob* job)
+{
+    m_folderStatJob = nullptr;
+    const KIO::UDSEntry entry = static_cast<KIO::StatJob*>(job)->statResult();
+    m_content->showItem(KFileItem(entry, m_shownUrl));

 }
 
 void InformationPanel::slotInfoTimeout()
 {
     m_shownUrl = m_urlCandidate;
 }
 
 void InformationPanel::slotInfoTimeout()
 {
     m_shownUrl = m_urlCandidate;

+    m_urlCandidate.clear();

     showItemInfo();
 }
 
     showItemInfo();
 }
 

-void InformationPanel::markOutdatedPreview()
-{
-    KIconEffect iconEffect;
-    QPixmap disabledPixmap = iconEffect.apply(m_preview->pixmap(),
-                                              KIconLoader::Desktop,
-                                              KIconLoader::DisabledState);
-    m_preview->setPixmap(disabledPixmap);
-}
-
-void InformationPanel::showIcon(const KFileItem& item)
-{
-    m_outdatedPreviewTimer->stop();
-    m_pendingPreview = false;
-    if (!applyPlace(item.url())) {
-        m_preview->setPixmap(item.pixmap(KIconLoader::SizeEnormous));
-    }
-}
-
-void InformationPanel::showPreview(const KFileItem& item,
-                                  const QPixmap& pixmap)
+void InformationPanel::reset()

 {
 {

-    m_outdatedPreviewTimer->stop();
+    if (m_invalidUrlCandidate == m_shownUrl) {
+        m_invalidUrlCandidate = QUrl();

 
 

-    Q_UNUSED(item);
-    if (m_pendingPreview) {
-        m_preview->setPixmap(pixmap);
-        m_pendingPreview = false;
+        // The current URL is still invalid. Reset
+        // the content to show the directory URL.
+        m_selection.clear();
+        m_shownUrl = url();
+        m_fileItem = KFileItem();
+        showItemInfo();

     }
 }
 
 void InformationPanel::slotFileRenamed(const QString& source, const QString& dest)
 {
     }
 }
 
 void InformationPanel::slotFileRenamed(const QString& source, const QString& dest)
 {

-    const KUrl sourceUrl = KUrl(source);
-
-    // Verify whether the renamed item is selected. If this is the case, the
-    // selection must be updated with the renamed item.
-    bool isSelected = false;
-    for (int i = m_selection.size() - 1; i >= 0; --i) {
-        if (m_selection[i].url() == sourceUrl) {
-            m_selection.removeAt(i);
-            isSelected = true;
-            break;
-        }
-    }
+    if (m_shownUrl == QUrl::fromLocalFile(source)) {
+        m_shownUrl = QUrl::fromLocalFile(dest);
+        m_fileItem = KFileItem(m_shownUrl);

 
 

-    if ((m_shownUrl == sourceUrl) || isSelected) {
-        m_shownUrl = KUrl(dest);
-        m_fileItem = KFileItem(KFileItem::Unknown, KFileItem::Unknown, m_shownUrl);
-        if (isSelected) {
-            m_selection.append(m_fileItem);
+        if ((m_selection.count() == 1) && (m_selection[0].url() == QUrl::fromLocalFile(source))) {
+            m_selection[0] = m_fileItem;
+            // Implementation note: Updating the selection is only required if exactly one
+            // item is selected, as the name of the item is shown. If this should change
+            // in future: Before parsing the whole selection take care to test possible
+            // performance bottlenecks when renaming several hundreds of files.

         }
         }

+

         showItemInfo();
     }
 }
 
 void InformationPanel::slotFilesAdded(const QString& directory)
 {
         showItemInfo();
     }
 }
 
 void InformationPanel::slotFilesAdded(const QString& directory)
 {

-    if (m_shownUrl == KUrl(directory)) {
+    if (m_shownUrl == QUrl::fromLocalFile(directory)) {

         // If the 'trash' icon changes because the trash has been emptied or got filled,
         // the signal filesAdded("trash:/") will be emitted.
         // If the 'trash' icon changes because the trash has been emptied or got filled,
         // the signal filesAdded("trash:/") will be emitted.

-        KFileItem item(KFileItem::Unknown, KFileItem::Unknown, KUrl(directory));
+        KFileItem item(QUrl::fromLocalFile(directory));

         requestDelayedItemInfo(item);
     }
 }
 
 void InformationPanel::slotFilesChanged(const QStringList& files)
 {
         requestDelayedItemInfo(item);
     }
 }
 
 void InformationPanel::slotFilesChanged(const QStringList& files)
 {

-    foreach (const QString& fileName, files) {
-        if (m_shownUrl == KUrl(fileName)) {
+    for (const QString& fileName : files) {
+        if (m_shownUrl == QUrl::fromLocalFile(fileName)) {

             showItemInfo();
             break;
         }
             showItemInfo();
             break;
         }


@@ -483,11 +322,11 @@ void InformationPanel::slotFilesChanged(const QStringList& files)
 
 void InformationPanel::slotFilesRemoved(const QStringList& files)
 {
 
 void InformationPanel::slotFilesRemoved(const QStringList& files)
 {

-    foreach (const QString& fileName, files) {
-        if (m_shownUrl == KUrl(fileName)) {
+    for (const QString& fileName : files) {
+        if (m_shownUrl == QUrl::fromLocalFile(fileName)) {

             // the currently shown item has been removed, show
             // the parent directory as fallback
             // the currently shown item has been removed, show
             // the parent directory as fallback

-            reset();
+            markUrlAsInvalid();

             break;
         }
     }
             break;
         }
     }


@@ -495,231 +334,47 @@ void InformationPanel::slotFilesRemoved(const QStringList& files)
 
 void InformationPanel::slotEnteredDirectory(const QString& directory)
 {
 
 void InformationPanel::slotEnteredDirectory(const QString& directory)
 {

-    if (m_shownUrl == KUrl(directory)) {
-        KFileItem item(KFileItem::Unknown, KFileItem::Unknown, KUrl(directory));
+    if (m_shownUrl == QUrl::fromLocalFile(directory)) {
+        KFileItem item(QUrl::fromLocalFile(directory));

         requestDelayedItemInfo(item);
     }
 }
 
 void InformationPanel::slotLeftDirectory(const QString& directory)
 {
         requestDelayedItemInfo(item);
     }
 }
 
 void InformationPanel::slotLeftDirectory(const QString& directory)
 {

-    if (m_shownUrl == KUrl(directory)) {
+    if (m_shownUrl == QUrl::fromLocalFile(directory)) {

         // The signal 'leftDirectory' is also emitted when a media
         // has been unmounted. In this case no directory change will be
         // done in Dolphin, but the Information Panel must be updated to
         // indicate an invalid directory.
         // The signal 'leftDirectory' is also emitted when a media
         // has been unmounted. In this case no directory change will be
         // done in Dolphin, but the Information Panel must be updated to
         // indicate an invalid directory.

-        reset();
+        markUrlAsInvalid();

     }
 }
 
     }
 }
 

-void InformationPanel::slotPlayingStarted()
-{
-    m_preview->setVisible(m_phononWidget->mode() != PhononWidget::Video);
-}
-
-void InformationPanel::slotPlayingStopped()
-{
-    m_preview->setVisible(true);
-}
-
-bool InformationPanel::applyPlace(const KUrl& url)
-{
-    KFilePlacesModel* placesModel = DolphinSettings::instance().placesModel();
-    int count = placesModel->rowCount();
-
-    for (int i = 0; i < count; ++i) {
-        QModelIndex index = placesModel->index(i, 0);
-
-        if (url.equals(placesModel->url(index), KUrl::CompareWithoutTrailingSlash)) {
-            setNameLabelText(placesModel->text(index));
-            m_preview->setPixmap(placesModel->icon(index).pixmap(128, 128));
-            return true;
-        }
-    }
-
-    return false;
-}
-

 void InformationPanel::cancelRequest()
 {
 void InformationPanel::cancelRequest()
 {

-    m_infoTimer->stop();
-}
-
-void InformationPanel::showMetaInfo()
-{
-    m_metaTextLabel->clear();
-
-    if (showMultipleSelectionInfo()) {
-        if (m_metaDataWidget != 0) {
-            KUrl::List urls;
-            foreach (const KFileItem& item, m_selection) {
-                urls.append(item.targetUrl());
-            }
-            m_metaDataWidget->setFiles(urls);
-        }
+    delete m_folderStatJob;
+    m_folderStatJob = nullptr;

 
 

-        quint64 totalSize = 0;
-        foreach (const KFileItem& item, m_selection) {
-            // Only count the size of files, not dirs to match what
-            // DolphinViewContainer::selectionStatusBarText() does.
-            if (!item.isDir() && !item.isLink()) {
-                totalSize += item.size();
-            }
-        }
-        m_metaTextLabel->add(i18nc("@label", "Total size:"), KIO::convertSize(totalSize));
-    } else {
-        const KFileItem item = fileItem();
-        if (item.isDir()) {
-            m_metaTextLabel->add(i18nc("@label", "Type:"), i18nc("@label", "Folder"));
-            m_metaTextLabel->add(i18nc("@label", "Modified:"), item.timeString());
-        } else {
-            m_metaTextLabel->add(i18nc("@label", "Type:"), item.mimeComment());
-
-            m_metaTextLabel->add(i18nc("@label", "Size:"), KIO::convertSize(item.size()));
-            m_metaTextLabel->add(i18nc("@label", "Modified:"), item.timeString());
-
-#ifdef HAVE_NEPOMUK
-            KConfig config("kmetainformationrc", KConfig::NoGlobals);
-            KConfigGroup settings = config.group("Show");
-            initMetaInfoSettings(settings);
-
-            Nepomuk::Resource res(item.url());
-
-            QHash<QUrl, Nepomuk::Variant> properties = res.properties();
-            QHash<QUrl, Nepomuk::Variant>::const_iterator it = properties.constBegin();
-            while (it != properties.constEnd()) {
-                Nepomuk::Types::Property prop(it.key());
-                const QString label = prop.label();
-                if (settings.readEntry(label, true)) {
-                    // TODO: use Nepomuk::formatValue(res, prop) if available
-                    // instead of it.value().toString()
-                    m_metaTextLabel->add(label, it.value().toString());
-                }
-                ++it;
-            }
-#endif
-        }
-
-        if (m_metaDataWidget != 0) {
-            m_metaDataWidget->setFile(item.targetUrl());
-        }
-    }
-
-    updatePhononWidget();
-}
-
-KFileItem InformationPanel::fileItem() const
-{
-    if (!m_fileItem.isNull()) {
-        return m_fileItem;
-    }
-
-    if (!m_selection.isEmpty()) {
-        Q_ASSERT(m_selection.count() == 1);
-        return m_selection.first();
-    }
-
-    // no item is hovered and no selection has been done: provide
-    // an item for the directory represented by m_shownUrl
-    KFileItem item(KFileItem::Unknown, KFileItem::Unknown, m_shownUrl);
-    item.refresh();
-    return item;
-}
-
-bool InformationPanel::showMultipleSelectionInfo() const
-{
-    return m_fileItem.isNull() && (m_selection.count() > 1);
-}
-
-bool InformationPanel::isEqualToShownUrl(const KUrl& url) const
-{
-    return m_shownUrl.equals(url, KUrl::CompareWithoutTrailingSlash);
-}
-
-void InformationPanel::setNameLabelText(const QString& text)
-{
-    QTextOption textOption;
-    textOption.setWrapMode(QTextOption::WrapAtWordBoundaryOrAnywhere);
-
-    QTextLayout textLayout(text);
-    textLayout.setFont(m_nameLabel->font());
-    textLayout.setTextOption(textOption);
-
-    QString wrappedText;
-    wrappedText.reserve(text.length());
-
-    // wrap the text to fit into the width of m_nameLabel
-    textLayout.beginLayout();
-    QTextLine line = textLayout.createLine();
-    while (line.isValid()) {
-        line.setLineWidth(m_nameLabel->width());
-        wrappedText += text.mid(line.textStart(), line.textLength());
-
-        line = textLayout.createLine();
-        if (line.isValid()) {
-            wrappedText += QChar::LineSeparator;
-        }
-    }
-    textLayout.endLayout();
+    m_infoTimer->stop();
+    m_resetUrlTimer->stop();
+    // Don't reset m_urlChangedTimer. As it is assured that the timeout of m_urlChangedTimer
+    // has the smallest interval (see init()), it is not possible that the exceeded timer
+    // would overwrite an information provided by a selection or hovering.

 
 

-    m_nameLabel->setText(wrappedText);
+    m_invalidUrlCandidate.clear();
+    m_urlCandidate.clear();

 }
 
 }
 

-void InformationPanel::reset()
+bool InformationPanel::isEqualToShownUrl(const QUrl& url) const

 {
 {

-    m_selection.clear();
-    m_shownUrl = url();
-    m_fileItem = KFileItem();
-    showItemInfo();
+    return m_shownUrl.matches(url, QUrl::StripTrailingSlash);

 }
 
 }
 

-void InformationPanel::initMetaInfoSettings(KConfigGroup& group)
+void InformationPanel::markUrlAsInvalid()

 {
 {

-    if (!group.readEntry("initialized", false)) {
-        // The resource file is read the first time. Assure
-        // that some meta information is disabled per default.
-        group.writeEntry("fileExtension", false);
-        group.writeEntry("url", false);
-        group.writeEntry("sourceModified", false);
-        group.writeEntry("parentUrl", false);
-        group.writeEntry("size", false);
-        group.writeEntry("mime type", false);
-        group.writeEntry("depth", false);
-        group.writeEntry("name", false);
-
-        // mark the group as initialized
-        group.writeEntry("initialized", true);
-    }
-}
-
-void InformationPanel::updatePhononWidget()
-{
-    const bool multipleSelections = showMultipleSelectionInfo();
-    const bool showPreview = InformationPanelSettings::showPreview();
-
-    if (multipleSelections || !showPreview) {
-        m_phononWidget->hide();
-    } else if (!multipleSelections && showPreview) {
-        const KFileItem item = fileItem();
-        const QString mimeType = item.mimetype();
-        const bool usePhonon = Phonon::BackendCapabilities::isMimeTypeAvailable(mimeType) &&
-                               (mimeType != "image/png");  // TODO: workaround, as Phonon
-                                                           // thinks it supports PNG images
-        if (usePhonon) {
-            m_phononWidget->show();
-            PhononWidget::Mode mode = mimeType.startsWith("video")
-                                      ? PhononWidget::Video
-                                      : PhononWidget::Audio;
-            m_phononWidget->setMode(mode);
-            m_phononWidget->setUrl(item.url());
-            if ((mode == PhononWidget::Video) && m_preview->isVisible()) {
-                m_phononWidget->setVideoSize(m_preview->size());
-            }
-        } else {
-            m_phononWidget->hide();
-            m_preview->setVisible(true);
-        }
-    }
+    m_invalidUrlCandidate = m_shownUrl;
+    m_resetUrlTimer->start();

 }
 
 void InformationPanel::init()
 }
 
 void InformationPanel::init()


@@ -727,105 +382,40 @@ void InformationPanel::init()
     m_infoTimer = new QTimer(this);
     m_infoTimer->setInterval(300);
     m_infoTimer->setSingleShot(true);
     m_infoTimer = new QTimer(this);
     m_infoTimer->setInterval(300);
     m_infoTimer->setSingleShot(true);

-    connect(m_infoTimer, SIGNAL(timeout()),
-            this, SLOT(slotInfoTimeout()));
-
-    // Initialize timer for disabling an outdated preview with a small
-    // delay. This prevents flickering if the new preview can be generated
-    // within a very small timeframe.
-    m_outdatedPreviewTimer = new QTimer(this);
-    m_outdatedPreviewTimer->setInterval(300);
-    m_outdatedPreviewTimer->setSingleShot(true);
-    connect(m_outdatedPreviewTimer, SIGNAL(timeout()),
-            this, SLOT(markOutdatedPreview()));
-
-    QVBoxLayout* layout = new QVBoxLayout;
-    layout->setSpacing(KDialog::spacingHint());
-
-    // name
-    m_nameLabel = new QLabel(this);
-    QFont font = m_nameLabel->font();
-    font.setBold(true);
-    m_nameLabel->setFont(font);
-    m_nameLabel->setAlignment(Qt::AlignHCenter);
-    m_nameLabel->setSizePolicy(QSizePolicy::Preferred, QSizePolicy::Fixed);
-    m_nameLabel->setMaximumWidth(KIconLoader::SizeEnormous);
-
-    // preview
-    const int minPreviewWidth = KIconLoader::SizeEnormous + KIconLoader::SizeMedium;
-
-    m_preview = new PixmapViewer(this);
-    m_preview->setMinimumWidth(minPreviewWidth);
-    m_preview->setMinimumHeight(KIconLoader::SizeEnormous);
-
-    m_phononWidget = new PhononWidget(this);
-    m_phononWidget->setMinimumWidth(minPreviewWidth);
-    connect(m_phononWidget, SIGNAL(playingStarted()),
-            this, SLOT(slotPlayingStarted()));
-    connect(m_phononWidget, SIGNAL(playingStopped()),
-            this, SLOT(slotPlayingStopped()));
-
-    m_previewSeparator = new KSeparator(this);
-
-    const bool showPreview = InformationPanelSettings::showPreview();
-    m_preview->setVisible(showPreview);
-    m_previewSeparator->setVisible(showPreview);
-
-    if (MetaDataWidget::metaDataAvailable()) {
-        // rating, comment and tags
-        m_metaDataWidget = new MetaDataWidget(this);
-        m_metaDataWidget->setSizePolicy(QSizePolicy::Preferred, QSizePolicy::Fixed);
-
-        const bool showRating  = InformationPanelSettings::showRating();
-        const bool showComment = InformationPanelSettings::showComment();
-        const bool showTags    = InformationPanelSettings::showTags();
-
-        m_metaDataWidget->setRatingVisible(showRating);
-        m_metaDataWidget->setCommentVisible(showComment);
-        m_metaDataWidget->setTagsVisible(showTags);
-
-        m_metaDataSeparator = new KSeparator(this);
-        m_metaDataSeparator->setVisible(showRating || showComment || showTags);
-    }
+    connect(m_infoTimer, &QTimer::timeout,
+            this, &InformationPanel::slotInfoTimeout);

 
 

-    // general meta text information
-    m_metaTextLabel = new MetaTextLabel(this);
-    m_metaTextLabel->setSizePolicy(QSizePolicy::Preferred, QSizePolicy::Fixed);
-
-    m_metaTextArea = new QScrollArea(this);
-    m_metaTextArea->setWidget(m_metaTextLabel);
-    m_metaTextArea->setWidgetResizable(true);
-    m_metaTextArea->setFrameShape(QFrame::NoFrame);
-
-    QWidget* viewport = m_metaTextArea->viewport();
-    viewport->installEventFilter(this);
-
-    QPalette palette = viewport->palette();
-    palette.setColor(viewport->backgroundRole(), QColor(Qt::transparent));
-    viewport->setPalette(palette);
-
-    layout->addWidget(m_nameLabel);
-    layout->addWidget(new KSeparator(this));
-    layout->addWidget(m_preview);
-    layout->addWidget(m_phononWidget);
-    layout->addWidget(m_previewSeparator);
-    if (m_metaDataWidget != 0) {
-        layout->addWidget(m_metaDataWidget);
-        layout->addWidget(m_metaDataSeparator);
-    }
-    layout->addWidget(m_metaTextArea);
-    setLayout(layout);
+    m_urlChangedTimer = new QTimer(this);
+    m_urlChangedTimer->setInterval(200);
+    m_urlChangedTimer->setSingleShot(true);
+    connect(m_urlChangedTimer, &QTimer::timeout,
+            this, &InformationPanel::showItemInfo);
+
+    m_resetUrlTimer = new QTimer(this);
+    m_resetUrlTimer->setInterval(1000);
+    m_resetUrlTimer->setSingleShot(true);
+    connect(m_resetUrlTimer, &QTimer::timeout,
+            this, &InformationPanel::reset);
+
+    Q_ASSERT(m_urlChangedTimer->interval() < m_infoTimer->interval());
+    Q_ASSERT(m_urlChangedTimer->interval() < m_resetUrlTimer->interval());

 
     org::kde::KDirNotify* dirNotify = new org::kde::KDirNotify(QString(), QString(),
                                                                QDBusConnection::sessionBus(), this);
 
     org::kde::KDirNotify* dirNotify = new org::kde::KDirNotify(QString(), QString(),
                                                                QDBusConnection::sessionBus(), this);

-    connect(dirNotify, SIGNAL(FileRenamed(QString, QString)), SLOT(slotFileRenamed(QString, QString)));
-    connect(dirNotify, SIGNAL(FilesAdded(QString)), SLOT(slotFilesAdded(QString)));
-    connect(dirNotify, SIGNAL(FilesChanged(QStringList)), SLOT(slotFilesChanged(QStringList)));
-    connect(dirNotify, SIGNAL(FilesRemoved(QStringList)), SLOT(slotFilesRemoved(QStringList)));
-    connect(dirNotify, SIGNAL(enteredDirectory(QString)), SLOT(slotEnteredDirectory(QString)));
-    connect(dirNotify, SIGNAL(leftDirectory(QString)), SLOT(slotLeftDirectory(QString)));
+    connect(dirNotify, &OrgKdeKDirNotifyInterface::FileRenamed, this, &InformationPanel::slotFileRenamed);
+    connect(dirNotify, &OrgKdeKDirNotifyInterface::FilesAdded, this, &InformationPanel::slotFilesAdded);
+    connect(dirNotify, &OrgKdeKDirNotifyInterface::FilesChanged, this, &InformationPanel::slotFilesChanged);
+    connect(dirNotify, &OrgKdeKDirNotifyInterface::FilesRemoved, this, &InformationPanel::slotFilesRemoved);
+    connect(dirNotify, &OrgKdeKDirNotifyInterface::enteredDirectory, this, &InformationPanel::slotEnteredDirectory);
+    connect(dirNotify, &OrgKdeKDirNotifyInterface::leftDirectory, this, &InformationPanel::slotLeftDirectory);
+
+    m_content = new InformationPanelContent(this);
+    connect(m_content, &InformationPanelContent::urlActivated, this, &InformationPanel::urlActivated);
+
+    QVBoxLayout* layout = new QVBoxLayout(this);
+    layout->setContentsMargins(0, 0, 0, 0);
+    layout->addWidget(m_content);

 
     m_initialized = true;
 }
 
 
     m_initialized = true;
 }
 

-#include "informationpanel.moc"