]> cloud.milkyroute.net Git - dolphin.git/blobdiff - src/dolphinmainwindow.cpp
Add Reset Zoom Level action inside View menu
[dolphin.git] / src / dolphinmainwindow.cpp
index 23894f3466910f616ecaa28ab78482849d2ec5e3..ec42d33f71adc50ad699ce7300b8e24c4f91cb00 100644 (file)
 
 #include "dolphinmainwindow.h"
 
+#include "config-terminal.h"
 #include "global.h"
+#include "dolphinbookmarkhandler.h"
 #include "dolphindockwidget.h"
 #include "dolphincontextmenu.h"
 #include "dolphinnewfilemenu.h"
 #include "dolphinrecenttabsmenu.h"
-#include "dolphintabwidget.h"
 #include "dolphinviewcontainer.h"
 #include "dolphintabpage.h"
 #include "middleclickactioneventfilter.h"
 #include "panels/folders/folderspanel.h"
+#include "panels/places/placesitemmodel.h"
 #include "panels/places/placespanel.h"
 #include "panels/information/informationpanel.h"
 #include "panels/terminal/terminalpanel.h"
@@ -47,6 +49,7 @@
 #include <KActionMenu>
 #include <KAuthorized>
 #include <KConfig>
+#include <KDualAction>
 #include <KFileItemListProperties>
 #include <KHelpMenu>
 #include <KIO/JobUiDelegate>
 #include <KRun>
 #include <KShell>
 #include <KStandardAction>
+#include <KStartupInfo>
 #include <KToggleAction>
 #include <KToolBar>
 #include <KToolInvocation>
 #include <KUrlComboBox>
 #include <KUrlNavigator>
+#include <KWindowSystem>
 
 #include <QApplication>
 #include <QClipboard>
 #include <QCloseEvent>
+#include <QDesktopServices>
 #include <QDialog>
 #include <QFileInfo>
 #include <QLineEdit>
@@ -78,7 +84,7 @@
 #include <QStandardPaths>
 #include <QTimer>
 #include <QToolButton>
-#include <kdualaction.h>
+#include <QWhatsThisClickedEvent>
 
 namespace {
     // Used for GeneralSettings::version() to determine whether
@@ -87,13 +93,15 @@ namespace {
 }
 
 DolphinMainWindow::DolphinMainWindow() :
-    KXmlGuiWindow(nullptr),
+    KXmlGuiWindow(nullptr, Qt::WindowContextHelpButtonHint),
     m_newFileMenu(nullptr),
+    m_helpMenu(nullptr),
     m_tabWidget(nullptr),
     m_activeViewContainer(nullptr),
     m_actionHandler(nullptr),
     m_remoteEncoding(nullptr),
     m_settingsDialog(),
+    m_bookmarkHandler(nullptr),
     m_controlButton(nullptr),
     m_updateToolBarTimer(nullptr),
     m_lastHandleUrlStatJob(nullptr),
@@ -111,7 +119,7 @@ DolphinMainWindow::DolphinMainWindow() :
     KIO::FileUndoManager* undoManager = KIO::FileUndoManager::self();
     undoManager->setUiInterface(new UndoUiInterface());
 
-    connect(undoManager, static_cast<void(KIO::FileUndoManager::*)(bool)>(&KIO::FileUndoManager::undoAvailable),
+    connect(undoManager, QOverload<bool>::of(&KIO::FileUndoManager::undoAvailable),
             this, &DolphinMainWindow::slotUndoAvailable);
     connect(undoManager, &KIO::FileUndoManager::undoTextChanged,
             this, &DolphinMainWindow::slotUndoTextChanged);
@@ -142,7 +150,7 @@ DolphinMainWindow::DolphinMainWindow() :
 
     m_actionHandler = new DolphinViewActionHandler(actionCollection(), this);
     connect(m_actionHandler, &DolphinViewActionHandler::actionBeingHandled, this, &DolphinMainWindow::clearStatusBar);
-    connect(m_actionHandler, &DolphinViewActionHandler::createDirectory, this, &DolphinMainWindow::createDirectory);
+    connect(m_actionHandler, &DolphinViewActionHandler::createDirectoryTriggered, this, &DolphinMainWindow::createDirectory);
 
     m_remoteEncoding = new DolphinRemoteEncoding(this, m_actionHandler);
     connect(this, &DolphinMainWindow::urlChanged,
@@ -177,22 +185,50 @@ DolphinMainWindow::DolphinMainWindow() :
     auto *middleClickEventFilter = new MiddleClickActionEventFilter(this);
     connect(middleClickEventFilter, &MiddleClickActionEventFilter::actionMiddleClicked, this, &DolphinMainWindow::slotToolBarActionMiddleClicked);
     toolBar()->installEventFilter(middleClickEventFilter);
+
+    setupWhatsThis();
 }
 
 DolphinMainWindow::~DolphinMainWindow()
 {
 }
 
+QVector<DolphinViewContainer*> DolphinMainWindow::viewContainers() const
+{
+    QVector<DolphinViewContainer*> viewContainers;
+    viewContainers.reserve(m_tabWidget->count());
+    for (int i = 0; i < m_tabWidget->count(); ++i) {
+        viewContainers << m_tabWidget->tabPageAt(i)->activeViewContainer();
+    }
+    return viewContainers;
+}
+
 void DolphinMainWindow::openDirectories(const QList<QUrl>& dirs, bool splitView)
 {
     m_tabWidget->openDirectories(dirs, splitView);
 }
 
+void DolphinMainWindow::openDirectories(const QStringList& dirs, bool splitView)
+{
+    openDirectories(QUrl::fromStringList(dirs), splitView);
+}
+
 void DolphinMainWindow::openFiles(const QList<QUrl>& files, bool splitView)
 {
     m_tabWidget->openFiles(files, splitView);
 }
 
+void DolphinMainWindow::openFiles(const QStringList& files, bool splitView)
+{
+    openFiles(QUrl::fromStringList(files), splitView);
+}
+
+void DolphinMainWindow::activateWindow()
+{
+    KStartupInfo::setNewStartupId(window(), KStartupInfo::startupId());
+    KWindowSystem::activateWindow(window()->effectiveWinId());
+}
+
 void DolphinMainWindow::showCommand(CommandType command)
 {
     DolphinStatusBar* statusBar = m_activeViewContainer->statusBar();
@@ -237,7 +273,7 @@ void DolphinMainWindow::changeUrl(const QUrl &url)
     }
 
     m_activeViewContainer->setUrl(url);
-    updateEditActions();
+    updateFileAndEditActions();
     updatePasteAction();
     updateViewActions();
     updateGoActions();
@@ -266,7 +302,7 @@ void DolphinMainWindow::slotEditableStateChanged(bool editable)
 
 void DolphinMainWindow::slotSelectionChanged(const KFileItemList& selection)
 {
-    updateEditActions();
+    updateFileAndEditActions();
 
     const int selectedUrlsCount = m_tabWidget->currentTabPage()->selectedItemsCount();
 
@@ -288,12 +324,15 @@ void DolphinMainWindow::updateHistory()
     QAction* backAction = actionCollection()->action(KStandardAction::name(KStandardAction::Back));
     if (backAction) {
         backAction->setToolTip(i18nc("@info", "Go back"));
+        backAction->setWhatsThis(i18nc("@info:whatsthis go back", "Return to the previously viewed folder."));
         backAction->setEnabled(index < urlNavigator->historySize() - 1);
     }
 
     QAction* forwardAction = actionCollection()->action(KStandardAction::name(KStandardAction::Forward));
     if (forwardAction) {
         forwardAction->setToolTip(i18nc("@info", "Go forward"));
+        forwardAction->setWhatsThis(xi18nc("@info:whatsthis go forward",
+            "This undoes a <interface>Go|Back</interface> action."));
         forwardAction->setEnabled(index > 0);
     }
 }
@@ -314,9 +353,45 @@ void DolphinMainWindow::openNewActivatedTab()
     m_tabWidget->openNewActivatedTab();
 }
 
-void DolphinMainWindow::openNewTab(const QUrl& url)
+void DolphinMainWindow::addToPlaces()
+{
+    QUrl url;
+    QString name;
+
+    // If nothing is selected, act on the current dir
+    if (m_activeViewContainer->view()->selectedItems().count() == 0) {
+        url = m_activeViewContainer->url();
+        name = m_activeViewContainer->placesText();
+    } else {
+        const auto dirToAdd = m_activeViewContainer->view()->selectedItems().first();
+        url = dirToAdd.url();
+        name = dirToAdd.name();
+    }
+    if (url.isValid()) {
+        PlacesItemModel model;
+        QString icon;
+        if (m_activeViewContainer->isSearchModeEnabled()) {
+            icon = QStringLiteral("folder-saved-search-symbolic");
+        } else {
+            icon = KIO::iconNameForUrl(url);
+        }
+        model.createPlacesItem(name, url, icon);
+    }
+}
+
+void DolphinMainWindow::openNewTab(const QUrl& url, DolphinTabWidget::TabPlacement tabPlacement)
+{
+    m_tabWidget->openNewTab(url, QUrl(), tabPlacement);
+}
+
+void DolphinMainWindow::openNewTabAfterCurrentTab(const QUrl& url)
+{
+    m_tabWidget->openNewTab(url, QUrl(), DolphinTabWidget::AfterCurrentTab);
+}
+
+void DolphinMainWindow::openNewTabAfterLastTab(const QUrl& url)
 {
-    m_tabWidget->openNewTab(url);
+    m_tabWidget->openNewTab(url, QUrl(), DolphinTabWidget::AfterLastTab);
 }
 
 void DolphinMainWindow::openInNewTab()
@@ -327,7 +402,7 @@ void DolphinMainWindow::openInNewTab()
     foreach (const KFileItem& item, list) {
         const QUrl& url = DolphinView::openItemAsFolderUrl(item);
         if (!url.isEmpty()) {
-            openNewTab(url);
+            openNewTabAfterCurrentTab(url);
             tabCreated = true;
         }
     }
@@ -335,7 +410,7 @@ void DolphinMainWindow::openInNewTab()
     // if no new tab has been created from the selection
     // open the current directory in a new tab
     if (!tabCreated) {
-        openNewTab(m_activeViewContainer->url());
+        openNewTabAfterCurrentTab(m_activeViewContainer->url());
     }
 }
 
@@ -407,7 +482,7 @@ void DolphinMainWindow::closeEvent(QCloseEvent* event)
 
         bool doNotAskAgainCheckboxResult = false;
 
-        const int result = KMessageBox::createKMessageBox(dialog,
+        const auto result = KMessageBox::createKMessageBox(dialog,
             buttons,
             QMessageBox::Warning,
             i18n("You have multiple tabs open in this window, are you sure you want to quit?"),
@@ -434,6 +509,58 @@ void DolphinMainWindow::closeEvent(QCloseEvent* event)
         }
     }
 
+    if (m_terminalPanel->hasProgramRunning() && GeneralSettings::confirmClosingTerminalRunningProgram() && closedByUser) {
+        // Ask if the user really wants to quit Dolphin with a program that is still running in the Terminal panel
+        // Open a confirmation dialog with 3 buttons:
+        // QDialogButtonBox::Yes    -> Quit
+        // QDialogButtonBox::No     -> Show Terminal Panel
+        // QDialogButtonBox::Cancel -> do nothing
+        QDialog *dialog = new QDialog(this, Qt::Dialog);
+        dialog->setWindowTitle(i18nc("@title:window", "Confirmation"));
+        dialog->setModal(true);
+        auto standardButtons = QDialogButtonBox::Yes | QDialogButtonBox::Cancel;
+        if (!m_terminalPanel->isVisible()) {
+            standardButtons |= QDialogButtonBox::No;
+        }
+        QDialogButtonBox *buttons = new QDialogButtonBox(standardButtons);
+        KGuiItem::assign(buttons->button(QDialogButtonBox::Yes), KStandardGuiItem::quit());
+        if (!m_terminalPanel->isVisible()) {
+            KGuiItem::assign(
+                    buttons->button(QDialogButtonBox::No),
+                    KGuiItem(i18n("Show &Terminal Panel"), QIcon::fromTheme(QStringLiteral("dialog-scripts"))));
+        }
+        KGuiItem::assign(buttons->button(QDialogButtonBox::Cancel), KStandardGuiItem::cancel());
+
+        bool doNotAskAgainCheckboxResult = false;
+
+        const auto result = KMessageBox::createKMessageBox(
+                dialog,
+                buttons,
+                QMessageBox::Warning,
+                i18n("The program '%1' is still running in the Terminal panel. Are you sure you want to quit?", m_terminalPanel->runningProgramName()),
+                QStringList(),
+                i18n("Do not ask again"),
+                &doNotAskAgainCheckboxResult,
+                KMessageBox::Dangerous);
+
+        if (doNotAskAgainCheckboxResult) {
+            GeneralSettings::setConfirmClosingTerminalRunningProgram(false);
+        }
+
+        switch (result) {
+            case QDialogButtonBox::Yes:
+                // Quit
+                break;
+            case QDialogButtonBox::No:
+                actionCollection()->action("show_terminal_panel")->trigger();
+                // Do not quit, ignore quit event
+                Q_FALLTHROUGH();
+            default:
+                event->ignore();
+                return;
+        }
+    }
+
     GeneralSettings::setVersion(CurrentDolphinVersion);
     GeneralSettings::self()->save();
 
@@ -455,10 +582,6 @@ void DolphinMainWindow::updateNewMenu()
     m_newFileMenu->setViewShowsHiddenFiles(activeViewContainer()->view()->hiddenFilesShown());
     m_newFileMenu->checkUpToDate();
     m_newFileMenu->setPopupFiles(activeViewContainer()->url());
-
-    // If we're in the trash, also disable all the 'create new' items
-    // TODO: remove this once https://phabricator.kde.org/T8234 is implemented
-    slotWriteStateChanged(m_activeViewContainer->view()->url().scheme() != QLatin1String("trash"));
 }
 
 void DolphinMainWindow::createDirectory()
@@ -521,6 +644,12 @@ void DolphinMainWindow::find()
     m_activeViewContainer->setSearchModeEnabled(true);
 }
 
+void DolphinMainWindow::updateSearchAction()
+{
+    QAction* toggleSearchAction = actionCollection()->action(QStringLiteral("toggle_search"));
+    toggleSearchAction->setChecked(m_activeViewContainer->isSearchModeEnabled());
+}
+
 void DolphinMainWindow::updatePasteAction()
 {
     QAction* pasteAction = actionCollection()->action(KStandardAction::name(KStandardAction::Paste));
@@ -555,7 +684,7 @@ void DolphinMainWindow::selectAll()
     // URL instead of all items of the view
 
     KUrlNavigator* urlNavigator = m_activeViewContainer->urlNavigator();
-    QLineEdit* lineEdit = urlNavigator->editor()->lineEdit(); // krazy:exclude=qclasses
+    QLineEdit* lineEdit = urlNavigator->editor()->lineEdit();
     const bool selectUrl = urlNavigator->isUrlEditable() &&
                            lineEdit->hasFocus();
     if (selectUrl) {
@@ -590,6 +719,7 @@ void DolphinMainWindow::reloadView()
 {
     clearStatusBar();
     m_activeViewContainer->reload();
+    m_activeViewContainer->statusBar()->updateSpaceInfo();
 }
 
 void DolphinMainWindow::stopLoading()
@@ -624,12 +754,19 @@ void DolphinMainWindow::toggleEditLocation()
 void DolphinMainWindow::replaceLocation()
 {
     KUrlNavigator* navigator = m_activeViewContainer->urlNavigator();
-    navigator->setUrlEditable(true);
-    navigator->setFocus();
-
-    // select the whole text of the combo box editor
-    QLineEdit* lineEdit = navigator->editor()->lineEdit();  // krazy:exclude=qclasses
-    lineEdit->selectAll();
+    QLineEdit* lineEdit = navigator->editor()->lineEdit();
+
+    // If the text field currently has focus and everything is selected,
+    // pressing the keyboard shortcut returns the whole thing to breadcrumb mode
+    if (navigator->isUrlEditable()
+        && lineEdit->hasFocus()
+        && lineEdit->selectedText() == lineEdit->text() ) {
+        navigator->setUrlEditable(false);
+    } else {
+        navigator->setUrlEditable(true);
+        navigator->setFocus();
+        lineEdit->selectAll();
+    }
 }
 
 void DolphinMainWindow::togglePanelLockState()
@@ -647,7 +784,7 @@ void DolphinMainWindow::togglePanelLockState()
 
 void DolphinMainWindow::slotTerminalPanelVisibilityChanged()
 {
-    if (m_terminalPanel->isHiddenInVisibleWindow()) {
+    if (m_terminalPanel->isHiddenInVisibleWindow() && m_activeViewContainer) {
         m_activeViewContainer->view()->setFocus();
     }
 }
@@ -683,25 +820,25 @@ void DolphinMainWindow::goBackInNewTab()
 {
     KUrlNavigator* urlNavigator = activeViewContainer()->urlNavigator();
     const int index = urlNavigator->historyIndex() + 1;
-    openNewTab(urlNavigator->locationUrl(index));
+    openNewTabAfterCurrentTab(urlNavigator->locationUrl(index));
 }
 
 void DolphinMainWindow::goForwardInNewTab()
 {
     KUrlNavigator* urlNavigator = activeViewContainer()->urlNavigator();
     const int index = urlNavigator->historyIndex() - 1;
-    openNewTab(urlNavigator->locationUrl(index));
+    openNewTabAfterCurrentTab(urlNavigator->locationUrl(index));
 }
 
 void DolphinMainWindow::goUpInNewTab()
 {
     const QUrl currentUrl = activeViewContainer()->urlNavigator()->locationUrl();
-    openNewTab(KIO::upUrl(currentUrl));
+    openNewTabAfterCurrentTab(KIO::upUrl(currentUrl));
 }
 
 void DolphinMainWindow::goHomeInNewTab()
 {
-    openNewTab(Dolphin::homeUrl());
+    openNewTabAfterCurrentTab(Dolphin::homeUrl());
 }
 
 void DolphinMainWindow::compareFiles()
@@ -806,10 +943,9 @@ void DolphinMainWindow::slotHandleUrlStatFinished(KJob* job)
 
 void DolphinMainWindow::slotWriteStateChanged(bool isFolderWritable)
 {
-    const auto actions = m_newFileMenu->menu()->actions();
-    for (auto menuItem : actions) {
-        menuItem->setEnabled(isFolderWritable);
-    }
+    // trash:/ is writable but we don't want to create new items in it.
+    // TODO: remove the trash check once https://phabricator.kde.org/T8234 is implemented
+    newFileMenu()->setEnabled(isFolderWritable && m_activeViewContainer->url().scheme() != QLatin1String("trash"));
 }
 
 void DolphinMainWindow::openContextMenu(const QPoint& pos,
@@ -833,7 +969,7 @@ void DolphinMainWindow::openContextMenu(const QPoint& pos,
         break;
 
     case DolphinContextMenu::OpenParentFolderInNewTab:
-        openNewTab(KIO::upUrl(item.url()));
+        openNewTabAfterLastTab(KIO::upUrl(item.url()));
         break;
 
     case DolphinContextMenu::None:
@@ -858,9 +994,18 @@ void DolphinMainWindow::updateControlMenu()
 
     KActionCollection* ac = actionCollection();
 
+    // Add "Create New" menu
+    menu->addMenu(m_newFileMenu->menu());
+
+    menu->addSeparator();
+
+    // Overwrite Find action to Search action
+    QAction *searchAction = ac->action(KStandardAction::name(KStandardAction::Find));
+    searchAction->setText(i18n("Search..."));
+
     // Add "Edit" actions
     bool added = addActionToMenu(ac->action(KStandardAction::name(KStandardAction::Undo)), menu) |
-                 addActionToMenu(ac->action(KStandardAction::name(KStandardAction::Find)), menu) |
+                 addActionToMenu(searchAction, menu) |
                  addActionToMenu(ac->action(KStandardAction::name(KStandardAction::SelectAll)), menu) |
                  addActionToMenu(ac->action(QStringLiteral("invert_selection")), menu);
 
@@ -871,6 +1016,7 @@ void DolphinMainWindow::updateControlMenu()
     // Add "View" actions
     if (!GeneralSettings::showZoomSlider()) {
         addActionToMenu(ac->action(KStandardAction::name(KStandardAction::ZoomIn)), menu);
+        addActionToMenu(ac->action(QStringLiteral("view_zoom_reset")), menu);
         addActionToMenu(ac->action(KStandardAction::name(KStandardAction::ZoomOut)), menu);
         menu->addSeparator();
     }
@@ -908,6 +1054,9 @@ void DolphinMainWindow::updateControlMenu()
     goMenu->addAction(ac->action(KStandardAction::name(KStandardAction::Up)));
     goMenu->addAction(ac->action(KStandardAction::name(KStandardAction::Home)));
     goMenu->addAction(ac->action(QStringLiteral("closed_tabs")));
+    KActionMenu *bookmarkMenu = new KActionMenu(i18nc("@title:menu", "&Bookmarks"), goMenu);
+    m_bookmarkHandler->fillControlMenu(bookmarkMenu->menu(), ac);
+    goMenu->addAction(bookmarkMenu);
     menu->addMenu(goMenu);
 
     // Add "Tool" menu
@@ -924,8 +1073,7 @@ void DolphinMainWindow::updateControlMenu()
     addActionToMenu(ac->action(KStandardAction::name(KStandardAction::Preferences)), menu);
 
     // Add "Help" menu
-    auto helpMenu = new KHelpMenu(menu);
-    menu->addMenu(helpMenu->menu());
+    menu->addMenu(m_helpMenu->menu());
 
     menu->addSeparator();
     addActionToMenu(ac->action(KStandardAction::name(KStandardAction::ShowMenubar)), menu);
@@ -970,11 +1118,18 @@ void DolphinMainWindow::activeViewChanged(DolphinViewContainer* viewContainer)
     m_activeViewContainer = viewContainer;
 
     if (oldViewContainer) {
+        const QAction* toggleSearchAction = actionCollection()->action(QStringLiteral("toggle_search"));
+        toggleSearchAction->disconnect(oldViewContainer);
+
         // Disconnect all signals between the old view container (container,
         // view and url navigator) and main window.
         oldViewContainer->disconnect(this);
         oldViewContainer->view()->disconnect(this);
         oldViewContainer->urlNavigator()->disconnect(this);
+
+        // except the requestItemInfo so that on hover the information panel can still be updated
+        connect(oldViewContainer->view(), &DolphinView::requestItemInfo,
+                this, &DolphinMainWindow::requestItemInfo);
     }
 
     connectViewSignals(viewContainer);
@@ -982,10 +1137,11 @@ void DolphinMainWindow::activeViewChanged(DolphinViewContainer* viewContainer)
     m_actionHandler->setCurrentView(viewContainer->view());
 
     updateHistory();
-    updateEditActions();
+    updateFileAndEditActions();
     updatePasteAction();
     updateViewActions();
     updateGoActions();
+    updateSearchAction();
 
     const QUrl url = viewContainer->url();
     emit urlChanged(url);
@@ -994,14 +1150,16 @@ void DolphinMainWindow::activeViewChanged(DolphinViewContainer* viewContainer)
 void DolphinMainWindow::tabCountChanged(int count)
 {
     const bool enableTabActions = (count > 1);
-    actionCollection()->action(KStandardAction::name(KStandardAction::Close))->setEnabled(enableTabActions);
     actionCollection()->action(QStringLiteral("activate_next_tab"))->setEnabled(enableTabActions);
     actionCollection()->action(QStringLiteral("activate_prev_tab"))->setEnabled(enableTabActions);
 }
 
 void DolphinMainWindow::updateWindowTitle()
 {
-    setWindowTitle(m_activeViewContainer->getCaption());
+    const QString newTitle = m_activeViewContainer->caption();
+    if (windowTitle() != newTitle) {
+        setWindowTitle(newTitle);
+    }
 }
 
 void DolphinMainWindow::slotStorageTearDownFromPlacesRequested(const QString& mountPath)
@@ -1036,40 +1194,100 @@ void DolphinMainWindow::setupActions()
 
     QAction* newWindow = KStandardAction::openNew(this, &DolphinMainWindow::openNewMainWindow, actionCollection());
     newWindow->setText(i18nc("@action:inmenu File", "New &Window"));
+    newWindow->setToolTip(i18nc("@info", "Open a new Dolphin window"));
+    newWindow->setWhatsThis(xi18nc("@info:whatsthis", "This opens a new "
+        "window just like this one with the current location and view."
+        "<nl/>You can drag and drop items between windows."));
+    newWindow->setIcon(QIcon::fromTheme(QStringLiteral("window-new")));
 
     QAction* newTab = actionCollection()->addAction(QStringLiteral("new_tab"));
     newTab->setIcon(QIcon::fromTheme(QStringLiteral("tab-new")));
     newTab->setText(i18nc("@action:inmenu File", "New Tab"));
-    actionCollection()->setDefaultShortcuts(newTab, {Qt::CTRL + Qt::Key_T, QKeySequence::AddTab});
-    connect(newTab, &QAction::triggered, this, static_cast<void(DolphinMainWindow::*)()>(&DolphinMainWindow::openNewActivatedTab));
-
-    QAction* closeTab = KStandardAction::close(
-            m_tabWidget, static_cast<void(DolphinTabWidget::*)()>(&DolphinTabWidget::closeTab), actionCollection());
+    newTab->setWhatsThis(xi18nc("@info:whatsthis", "This opens a new "
+        "<emphasis>Tab</emphasis> with the current location and view.<nl/>"
+        "A tab is an additional view within this window. "
+        "You can drag and drop items between tabs."));
+    actionCollection()->setDefaultShortcuts(newTab, {Qt::CTRL + Qt::Key_T, Qt::CTRL + Qt::SHIFT + Qt::Key_N});
+    connect(newTab, &QAction::triggered, this, &DolphinMainWindow::openNewActivatedTab);
+
+    QAction* addToPlaces = actionCollection()->addAction(QStringLiteral("add_to_places"));
+    addToPlaces->setIcon(QIcon::fromTheme(QStringLiteral("bookmark-new")));
+    addToPlaces->setWhatsThis(xi18nc("@info:whatsthis", "This adds the selected folder "
+        "to the Places panel."));
+    connect(addToPlaces, &QAction::triggered, this, &DolphinMainWindow::addToPlaces);
+
+    QAction* closeTab = KStandardAction::close(m_tabWidget, QOverload<>::of(&DolphinTabWidget::closeTab), actionCollection());
     closeTab->setText(i18nc("@action:inmenu File", "Close Tab"));
-    closeTab->setEnabled(false);
+    closeTab->setWhatsThis(i18nc("@info:whatsthis", "This closes the "
+        "currently viewed tab. If no more tabs are left this window "
+        "will close instead."));
 
-    KStandardAction::quit(this, &DolphinMainWindow::quit, actionCollection());
+    QAction* quitAction = KStandardAction::quit(this, &DolphinMainWindow::quit, actionCollection());
+    quitAction->setWhatsThis(i18nc("@info:whatsthis quit", "This closes this window."));
 
     // setup 'Edit' menu
     KStandardAction::undo(this,
                           &DolphinMainWindow::undo,
                           actionCollection());
 
-
-    KStandardAction::cut(this, &DolphinMainWindow::cut, actionCollection());
-    KStandardAction::copy(this, &DolphinMainWindow::copy, actionCollection());
+    // i18n: This will be the last paragraph for the whatsthis for all three:
+    // Cut, Copy and Paste
+    const QString cutCopyPastePara = xi18nc("@info:whatsthis", "<para><emphasis>Cut, "
+        "Copy</emphasis> and <emphasis>Paste</emphasis> work between many "
+        "applications and are among the most used commands. That's why their "
+        "<emphasis>keyboard shortcuts</emphasis> are prominently placed right "
+        "next to each other on the keyboard: <shortcut>Ctrl+X</shortcut>, "
+        "<shortcut>Ctrl+C</shortcut> and <shortcut>Ctrl+V</shortcut>.</para>");
+    QAction* cutAction = KStandardAction::cut(this, &DolphinMainWindow::cut, actionCollection());
+    cutAction->setWhatsThis(xi18nc("@info:whatsthis cut", "This copies the items "
+        "in your current selection to the <emphasis>clipboard</emphasis>.<nl/>"
+        "Use the <emphasis>Paste</emphasis> action afterwards to copy them from "
+        "the clipboard to a new location. The items will be removed from their "
+        "initial location.") + cutCopyPastePara);
+    QAction* copyAction = KStandardAction::copy(this, &DolphinMainWindow::copy, actionCollection());
+    copyAction->setWhatsThis(xi18nc("@info:whatsthis copy", "This copies the "
+        "items in your current selection to the <emphasis>clipboard</emphasis>."
+        "<nl/>Use the <emphasis>Paste</emphasis> action afterwards to copy them "
+        "from the clipboard to a new location.") +  cutCopyPastePara);
     QAction* paste = KStandardAction::paste(this, &DolphinMainWindow::paste, actionCollection());
     // The text of the paste-action is modified dynamically by Dolphin
     // (e. g. to "Paste One Folder"). To prevent that the size of the toolbar changes
     // due to the long text, the text "Paste" is used:
     paste->setIconText(i18nc("@action:inmenu Edit", "Paste"));
-
-    KStandardAction::find(this, &DolphinMainWindow::find, actionCollection());
-
-    KStandardAction::selectAll(this, &DolphinMainWindow::selectAll, actionCollection());
+    paste->setWhatsThis(xi18nc("@info:whatsthis paste", "This copies the items from "
+        "your <emphasis>clipboard</emphasis> to the currently viewed folder.<nl/>"
+        "If the items were added to the clipboard by the <emphasis>Cut</emphasis> "
+        "action they are removed from their old location.") +  cutCopyPastePara);
+
+    QAction *searchAction = KStandardAction::find(this, &DolphinMainWindow::find, actionCollection());
+    searchAction->setText(i18n("Search..."));
+    searchAction->setToolTip(i18nc("@info:tooltip", "Search for files and folders"));
+    searchAction->setWhatsThis(xi18nc("@info:whatsthis find", "<para>This helps you "
+        "find files and folders by opening a <emphasis>find bar</emphasis>. "
+        "There you can enter search terms and specify settings to find the "
+        "objects you are looking for.</para><para>Use this help again on "
+        "the find bar so we can have a look at it while the settings are "
+        "explained.</para>"));
+
+    // toggle_search acts as a copy of the main searchAction to be used mainly
+    // in the toolbar, with no default shortcut attached, to avoid messing with
+    // existing workflows (search bar always open and Ctrl-F to focus)
+    QAction *toggleSearchAction = actionCollection()->addAction(QStringLiteral("toggle_search"));
+    toggleSearchAction->setText(i18nc("@action:inmenu", "Toggle Search Bar"));
+    toggleSearchAction->setIconText(i18nc("@action:intoolbar", "Search"));
+    toggleSearchAction->setIcon(searchAction->icon());
+    toggleSearchAction->setToolTip(searchAction->toolTip());
+    toggleSearchAction->setWhatsThis(searchAction->whatsThis());
+    toggleSearchAction->setCheckable(true);
+
+    QAction* selectAllAction = KStandardAction::selectAll(this, &DolphinMainWindow::selectAll, actionCollection());
+    selectAllAction->setWhatsThis(xi18nc("@info:whatsthis", "This selects all "
+        "files and folders in the current location."));
 
     QAction* invertSelection = actionCollection()->addAction(QStringLiteral("invert_selection"));
     invertSelection->setText(i18nc("@action:inmenu Edit", "Invert Selection"));
+    invertSelection->setWhatsThis(xi18nc("@info:whatsthis invert", "This selects all "
+        "objects that you have currently <emphasis>not</emphasis> selected instead."));
     invertSelection->setIcon(QIcon::fromTheme(QStringLiteral("edit-select-invert")));
     actionCollection()->setDefaultShortcut(invertSelection, Qt::CTRL + Qt::SHIFT + Qt::Key_A);
     connect(invertSelection, &QAction::triggered, this, &DolphinMainWindow::invertSelection);
@@ -1078,6 +1296,10 @@ void DolphinMainWindow::setupActions()
     // (note that most of it is set up in DolphinViewActionHandler)
 
     QAction* split = actionCollection()->addAction(QStringLiteral("split_view"));
+    split->setWhatsThis(xi18nc("@info:whatsthis find", "<para>This splits "
+        "the folder view below into two autonomous views.</para><para>This "
+        "way you can see two locations at once and move items between them "
+        "quickly.</para>Click this again afterwards to recombine the views."));
     actionCollection()->setDefaultShortcut(split, Qt::Key_F3);
     connect(split, &QAction::triggered, this, &DolphinMainWindow::toggleSplitView);
 
@@ -1095,16 +1317,28 @@ void DolphinMainWindow::setupActions()
     QAction* stop = actionCollection()->addAction(QStringLiteral("stop"));
     stop->setText(i18nc("@action:inmenu View", "Stop"));
     stop->setToolTip(i18nc("@info", "Stop loading"));
+    stop->setWhatsThis(i18nc("@info", "This stops the loading of the contents of the current folder."));
     stop->setIcon(QIcon::fromTheme(QStringLiteral("process-stop")));
     connect(stop, &QAction::triggered, this, &DolphinMainWindow::stopLoading);
 
     KToggleAction* editableLocation = actionCollection()->add<KToggleAction>(QStringLiteral("editable_location"));
     editableLocation->setText(i18nc("@action:inmenu Navigation Bar", "Editable Location"));
+    editableLocation->setWhatsThis(xi18nc("@info:whatsthis",
+        "This toggles the <emphasis>Location Bar</emphasis> to be "
+        "editable so you can directly enter a location you want to go to.<nl/>"
+        "You can also switch to editing by clicking to the right of the "
+        "location and switch back by confirming the edited location."));
     actionCollection()->setDefaultShortcut(editableLocation, Qt::Key_F6);
     connect(editableLocation, &KToggleAction::triggered, this, &DolphinMainWindow::toggleEditLocation);
 
     QAction* replaceLocation = actionCollection()->addAction(QStringLiteral("replace_location"));
     replaceLocation->setText(i18nc("@action:inmenu Navigation Bar", "Replace Location"));
+    // i18n: "enter" is used both in the meaning of "writing" and "going to" a new location here.
+    // Both meanings are useful but not necessary to understand the use of "Replace Location".
+    // So you might want to be more verbose in your language to convey the meaning but it's up to you.
+    replaceLocation->setWhatsThis(xi18nc("@info:whatsthis",
+        "This switches to editing the location and selects it "
+        "so you can quickly enter a different location."));
     actionCollection()->setDefaultShortcut(replaceLocation, Qt::CTRL + Qt::Key_L);
     connect(replaceLocation, &QAction::triggered, this, &DolphinMainWindow::replaceLocation);
 
@@ -1125,21 +1359,37 @@ void DolphinMainWindow::setupActions()
 
     QAction* undoCloseTab = actionCollection()->addAction(QStringLiteral("undo_close_tab"));
     undoCloseTab->setText(i18nc("@action:inmenu File", "Undo close tab"));
+    undoCloseTab->setWhatsThis(i18nc("@info:whatsthis undo close tab",
+        "This returns you to the previously closed tab."));
     actionCollection()->setDefaultShortcut(undoCloseTab, Qt::CTRL + Qt::SHIFT + Qt::Key_T);
     undoCloseTab->setIcon(QIcon::fromTheme(QStringLiteral("edit-undo")));
     undoCloseTab->setEnabled(false);
     connect(undoCloseTab, &QAction::triggered, recentTabsMenu, &DolphinRecentTabsMenu::undoCloseTab);
 
     auto undoAction = actionCollection()->action(KStandardAction::name(KStandardAction::Undo));
+    undoAction->setWhatsThis(xi18nc("@info:whatsthis", "This undoes "
+        "the last change you made to files or folders.<nl/>"
+        "Such changes include <interface>creating, renaming</interface> "
+        "and <interface>moving</interface> them to a different location "
+        "or to the <filename>Trash</filename>. <nl/>Changes that can't "
+        "be undone will ask for your confirmation."));
     undoAction->setEnabled(false); // undo should be disabled by default
 
     KStandardAction::forward(this, &DolphinMainWindow::goForward, actionCollection());
     KStandardAction::up(this, &DolphinMainWindow::goUp, actionCollection());
-    KStandardAction::home(this, &DolphinMainWindow::goHome, actionCollection());
+    QAction* homeAction = KStandardAction::home(this, &DolphinMainWindow::goHome, actionCollection());
+    homeAction->setWhatsThis(xi18nc("@info:whatsthis", "Go to your "
+        "<filename>Home</filename> folder.<nl/>Every user account "
+        "has their own <filename>Home</filename> that contains their data "
+        "including folders that contain personal application data."));
 
     // setup 'Tools' menu
     QAction* showFilterBar = actionCollection()->addAction(QStringLiteral("show_filter_bar"));
     showFilterBar->setText(i18nc("@action:inmenu Tools", "Show Filter Bar"));
+    showFilterBar->setWhatsThis(xi18nc("@info:whatsthis", "This opens the "
+        "<emphasis>Filter Bar</emphasis> at the bottom of the window.<nl/> "
+        "There you can enter a text to filter the files and folders currently displayed. "
+        "Only those that contain the text in their name will be kept in view."));
     showFilterBar->setIcon(QIcon::fromTheme(QStringLiteral("view-filter")));
     actionCollection()->setDefaultShortcuts(showFilterBar, {Qt::CTRL + Qt::Key_I, Qt::Key_Slash});
     connect(showFilterBar, &QAction::triggered, this, &DolphinMainWindow::showFilterBar);
@@ -1150,22 +1400,44 @@ void DolphinMainWindow::setupActions()
     compareFiles->setEnabled(false);
     connect(compareFiles, &QAction::triggered, this, &DolphinMainWindow::compareFiles);
 
-#ifndef Q_OS_WIN
+#ifdef HAVE_TERMINAL
     if (KAuthorized::authorize(QStringLiteral("shell_access"))) {
         QAction* openTerminal = actionCollection()->addAction(QStringLiteral("open_terminal"));
         openTerminal->setText(i18nc("@action:inmenu Tools", "Open Terminal"));
-        openTerminal->setIcon(QIcon::fromTheme(QStringLiteral("utilities-terminal")));
+        openTerminal->setWhatsThis(xi18nc("@info:whatsthis",
+            "<para>This opens a <emphasis>terminal</emphasis> application for the viewed location.</para>"
+            "<para>To learn more about terminals use the help in the terminal application.</para>"));
+        openTerminal->setIcon(QIcon::fromTheme(QStringLiteral("dialog-scripts")));
         actionCollection()->setDefaultShortcut(openTerminal, Qt::SHIFT + Qt::Key_F4);
         connect(openTerminal, &QAction::triggered, this, &DolphinMainWindow::openTerminal);
     }
 #endif
 
+    // setup 'Bookmarks' menu
+    KActionMenu *bookmarkMenu = new KActionMenu(i18nc("@title:menu", "&Bookmarks"), this);
+    bookmarkMenu->setIcon(QIcon::fromTheme(QStringLiteral("bookmarks")));
+    // Make the toolbar button version work properly on click
+    bookmarkMenu->setDelayed(false);
+    m_bookmarkHandler = new DolphinBookmarkHandler(this, actionCollection(), bookmarkMenu->menu(), this);
+    actionCollection()->addAction(QStringLiteral("bookmarks"), bookmarkMenu);
+
     // setup 'Settings' menu
     KToggleAction* showMenuBar = KStandardAction::showMenubar(nullptr, nullptr, actionCollection());
+    showMenuBar->setWhatsThis(xi18nc("@info:whatsthis",
+            "This switches between having a <emphasis>Menubar</emphasis> "
+            "and having a <interface>Control</interface> button. Both "
+            "contain mostly the same commands and configuration options."));
     connect(showMenuBar, &KToggleAction::triggered,                   // Fixes #286822
             this, &DolphinMainWindow::toggleShowMenuBar, Qt::QueuedConnection);
     KStandardAction::preferences(this, &DolphinMainWindow::editSettings, actionCollection());
 
+    // setup 'Help' menu for the m_controlButton. The other one is set up in the base class.
+    m_helpMenu = new KHelpMenu(nullptr);
+    m_helpMenu->menu()->installEventFilter(this);
+    // remove duplicate shortcuts
+    m_helpMenu->action(KHelpMenu::menuHelpContents)->setShortcut(QKeySequence());
+    m_helpMenu->action(KHelpMenu::menuWhatsThis)->setShortcut(QKeySequence());
+
     // not in menu actions
     QList<QKeySequence> nextTabKeys = KStandardShortcut::tabNext();
     nextTabKeys.append(QKeySequence(Qt::CTRL + Qt::Key_Tab));
@@ -1219,6 +1491,11 @@ void DolphinMainWindow::setupDockWidgets()
     lockLayoutAction->setActiveIcon(QIcon::fromTheme(QStringLiteral("object-unlocked")));
     lockLayoutAction->setInactiveText(i18nc("@action:inmenu Panels", "Lock Panels"));
     lockLayoutAction->setInactiveIcon(QIcon::fromTheme(QStringLiteral("object-locked")));
+    lockLayoutAction->setWhatsThis(xi18nc("@info:whatsthis", "This "
+        "switches between having panels <emphasis>locked</emphasis> or "
+        "<emphasis>unlocked</emphasis>.<nl/>Unlocked panels can be "
+        "dragged to the other side of the window and have a close "
+        "button.<nl/>Locked panels are embedded more cleanly."));
     lockLayoutAction->setActive(lock);
     connect(lockLayoutAction, &KDualAction::triggered, this, &DolphinMainWindow::togglePanelLockState);
 
@@ -1246,6 +1523,26 @@ void DolphinMainWindow::setupDockWidgets()
             infoPanel, &InformationPanel::requestDelayedItemInfo);
 #endif
 
+    // i18n: This is the last paragraph for the "What's This"-texts of all four panels.
+    const QString panelWhatsThis = xi18nc("@info:whatsthis", "<para>To show or "
+        "hide panels like this go to <interface>Control|Panels</interface> "
+        "or <interface>View|Panels</interface>.</para>");
+#ifdef HAVE_BALOO
+    actionCollection()->action(QStringLiteral("show_information_panel"))
+        ->setWhatsThis(xi18nc("@info:whatsthis", "<para> This toggles the "
+        "<emphasis>information</emphasis> panel at the right side of the "
+        "window.</para><para>The panel provides in-depth information "
+        "about the items your mouse is hovering over or about the selected "
+        "items. Otherwise it informs you about the currently viewed folder.<nl/>"
+        "For single items a preview of their contents is provided.</para>"));
+#endif
+    infoDock->setWhatsThis(xi18nc("@info:whatsthis", "<para>This panel "
+        "provides in-depth information about the items your mouse is "
+        "hovering over or about the selected items. Otherwise it informs "
+        "you about the currently viewed folder.<nl/>For single items a "
+        "preview of their contents is provided.</para><para>You can configure "
+        "which and how details are given here by right-clicking.</para>") + panelWhatsThis);
+
     // Setup "Folders"
     DolphinDockWidget* foldersDock = new DolphinDockWidget(i18nc("@title:window", "Folders"));
     foldersDock->setLocked(lock);
@@ -1264,12 +1561,23 @@ void DolphinMainWindow::setupDockWidgets()
     connect(foldersPanel, &FoldersPanel::folderActivated,
             this, &DolphinMainWindow::changeUrl);
     connect(foldersPanel, &FoldersPanel::folderMiddleClicked,
-            this, &DolphinMainWindow::openNewTab);
+            this, &DolphinMainWindow::openNewTabAfterCurrentTab);
     connect(foldersPanel, &FoldersPanel::errorMessage,
             this, &DolphinMainWindow::showErrorMessage);
 
+    actionCollection()->action(QStringLiteral("show_folders_panel"))
+        ->setWhatsThis(xi18nc("@info:whatsthis", "This toggles the "
+        "<emphasis>folders</emphasis> panel at the left side of the window."
+        "<nl/><nl/>It shows the folders of the <emphasis>file system"
+        "</emphasis> in a <emphasis>tree view</emphasis>."));
+    foldersDock->setWhatsThis(xi18nc("@info:whatsthis", "<para>This panel "
+        "shows the folders of the <emphasis>file system</emphasis> in a "
+        "<emphasis>tree view</emphasis>.</para><para>Click a folder to go "
+        "there. Click the arrow to the left of a folder to see its subfolders. "
+        "This allows quick switching between any folders.</para>") + panelWhatsThis);
+
     // Setup "Terminal"
-#ifndef Q_OS_WIN
+#ifdef HAVE_TERMINAL
     if (KAuthorized::authorize(QStringLiteral("shell_access"))) {
         DolphinDockWidget* terminalDock = new DolphinDockWidget(i18nc("@title:window Shell terminal", "Terminal"));
         terminalDock->setLocked(lock);
@@ -1286,7 +1594,7 @@ void DolphinMainWindow::setupDockWidgets()
                 this, &DolphinMainWindow::slotTerminalPanelVisibilityChanged);
 
         QAction* terminalAction = terminalDock->toggleViewAction();
-        createPanelAction(QIcon::fromTheme(QStringLiteral("utilities-terminal")), Qt::Key_F4, terminalAction, QStringLiteral("show_terminal_panel"));
+        createPanelAction(QIcon::fromTheme(QStringLiteral("dialog-scripts")), Qt::Key_F4, terminalAction, QStringLiteral("show_terminal_panel"));
 
         addDockWidget(Qt::BottomDockWidgetArea, terminalDock);
         connect(this, &DolphinMainWindow::urlChanged,
@@ -1295,6 +1603,22 @@ void DolphinMainWindow::setupDockWidgets()
         if (GeneralSettings::version() < 200) {
             terminalDock->hide();
         }
+
+        actionCollection()->action(QStringLiteral("show_terminal_panel"))
+            ->setWhatsThis(xi18nc("@info:whatsthis", "<para>This toggles the "
+            "<emphasis>terminal</emphasis> panel at the bottom of the window."
+            "<nl/>The location in the terminal will always match the folder "
+            "view so you can navigate using either.</para><para>The terminal "
+            "panel is not needed for basic computer usage but can be useful "
+            "for advanced tasks. To learn more about terminals use the help "
+            "in a standalone terminal application like Konsole.</para>"));
+        terminalDock->setWhatsThis(xi18nc("@info:whatsthis", "<para>This is "
+            "the <emphasis>terminal</emphasis> panel. It behaves like a "
+            "normal terminal but will match the location of the folder view "
+            "so you can navigate using either.</para><para>The terminal panel "
+            "is not needed for basic computer usage but can be useful for "
+            "advanced tasks. To learn more about terminals use the help in a "
+            "standalone terminal application like Konsole.</para>") + panelWhatsThis);
     }
 #endif
 
@@ -1320,7 +1644,7 @@ void DolphinMainWindow::setupDockWidgets()
     connect(m_placesPanel, &PlacesPanel::placeActivated,
             this, &DolphinMainWindow::slotPlaceActivated);
     connect(m_placesPanel, &PlacesPanel::placeMiddleClicked,
-            this, &DolphinMainWindow::openNewTab);
+            this, &DolphinMainWindow::openNewTabAfterCurrentTab);
     connect(m_placesPanel, &PlacesPanel::errorMessage,
             this, &DolphinMainWindow::showErrorMessage);
     connect(this, &DolphinMainWindow::urlChanged,
@@ -1335,6 +1659,42 @@ void DolphinMainWindow::setupDockWidgets()
             this, &DolphinMainWindow::slotStorageTearDownExternallyRequested);
     m_tabWidget->slotPlacesPanelVisibilityChanged(m_placesPanel->isVisible());
 
+    auto actionShowAllPlaces = new QAction(QIcon::fromTheme(QStringLiteral("view-hidden")), i18nc("@item:inmenu", "Show Hidden Places"), this);
+    actionShowAllPlaces->setCheckable(true);
+    actionShowAllPlaces->setDisabled(true);
+    actionShowAllPlaces->setWhatsThis(i18nc("@info:whatsthis", "This displays "
+        "all places in the places panel that have been hidden. They will "
+        "appear semi-transparent unless you uncheck their hide property."));
+
+    connect(actionShowAllPlaces, &QAction::triggered, this, [actionShowAllPlaces, this](bool checked){
+        actionShowAllPlaces->setIcon(QIcon::fromTheme(checked ? QStringLiteral("view-visible") : QStringLiteral("view-hidden")));
+        m_placesPanel->showHiddenEntries(checked);
+    });
+
+    connect(m_placesPanel, &PlacesPanel::showHiddenEntriesChanged, this, [actionShowAllPlaces] (bool checked){
+        actionShowAllPlaces->setChecked(checked);
+        actionShowAllPlaces->setIcon(QIcon::fromTheme(checked ? QStringLiteral("view-visible") : QStringLiteral("view-hidden")));
+   });
+
+    actionCollection()->action(QStringLiteral("show_places_panel"))
+        ->setWhatsThis(xi18nc("@info:whatsthis", "<para>This toggles the "
+        "<emphasis>places</emphasis> panel at the left side of the window."
+        "</para><para>It allows you to go to locations you have "
+        "bookmarked and to access disk or media attached to the computer "
+        "or to the network. It also contains sections to find recently "
+        "saved files or files of a certain type.</para>"));
+    placesDock->setWhatsThis(xi18nc("@info:whatsthis", "<para>This is the "
+        "<emphasis>Places</emphasis> panel. It allows you to go to locations "
+        "you have bookmarked and to access disk or media attached to the "
+        "computer or to the network. It also contains sections to find "
+        "recently saved files or files of a certain type.</para><para>"
+        "Click on an entry to go there. Click with the right mouse button "
+        "instead to open any entry in a new tab or new window.</para>"
+        "<para>New entries can be added by dragging folders onto this panel. "
+        "Right-click any section or entry to hide it. Right-click an empty "
+        "space on this panel and select <interface>Show Hidden Places"
+        "</interface> to display it again.</para>") + panelWhatsThis);
+
     // Add actions into the "Panels" menu
     KActionMenu* panelsMenu = new KActionMenu(i18nc("@action:inmenu View", "Panels"), this);
     actionCollection()->addAction(QStringLiteral("panels"), panelsMenu);
@@ -1347,18 +1707,28 @@ void DolphinMainWindow::setupDockWidgets()
     panelsMenu->addAction(ac->action(QStringLiteral("show_folders_panel")));
     panelsMenu->addAction(ac->action(QStringLiteral("show_terminal_panel")));
     panelsMenu->addSeparator();
+    panelsMenu->addAction(actionShowAllPlaces);
     panelsMenu->addAction(lockLayoutAction);
+
+    connect(panelsMenu->menu(), &QMenu::aboutToShow, this, [actionShowAllPlaces, this]{
+        actionShowAllPlaces->setEnabled(m_placesPanel->hiddenListCount());
+    });
 }
 
-void DolphinMainWindow::updateEditActions()
+
+void DolphinMainWindow::updateFileAndEditActions()
 {
     const KFileItemList list = m_activeViewContainer->view()->selectedItems();
+    const KActionCollection* col = actionCollection();
+    QAction* addToPlacesAction = col->action(QStringLiteral("add_to_places"));
+
     if (list.isEmpty()) {
         stateChanged(QStringLiteral("has_no_selection"));
+
+        addToPlacesAction->setText(i18nc("@action:inmenu Add current folder to places", "Add '%1' to Places", m_activeViewContainer->placesText()));
     } else {
         stateChanged(QStringLiteral("has_selection"));
 
-        KActionCollection* col = actionCollection();
         QAction* renameAction            = col->action(KStandardAction::name(KStandardAction::RenameFile));
         QAction* moveToTrashAction       = col->action(KStandardAction::name(KStandardAction::MoveToTrash));
         QAction* deleteAction            = col->action(KStandardAction::name(KStandardAction::DeleteFile));
@@ -1366,6 +1736,14 @@ void DolphinMainWindow::updateEditActions()
         QAction* deleteWithTrashShortcut = col->action(QStringLiteral("delete_shortcut")); // see DolphinViewActionHandler
         QAction* showTarget              = col->action(QStringLiteral("show_target"));
 
+        if (list.length() == 1 && list.first().isDir()) {
+            addToPlacesAction->setEnabled(true);
+            addToPlacesAction->setText(i18nc("@action:inmenu Add current folder to places", "Add '%1' to Places", list.first().name()));
+        } else {
+            addToPlacesAction->setEnabled(false);
+            addToPlacesAction->setText(i18nc("@action:inmenu Add current folder to places", "Add to Places"));
+        }
+
         KFileItemListProperties capabilities(list);
         const bool enableMoveToTrash = capabilities.isLocal() && capabilities.supportsMoving();
 
@@ -1396,6 +1774,16 @@ void DolphinMainWindow::updateGoActions()
 {
     QAction* goUpAction = actionCollection()->action(KStandardAction::name(KStandardAction::Up));
     const QUrl currentUrl = m_activeViewContainer->url();
+    // I think this is one of the best places to firstly be confronted
+    // with a file system and its hierarchy. Talking about the root
+    // directory might seem too much here but it is the question that
+    // naturally arises in this context.
+    goUpAction->setWhatsThis(xi18nc("@info:whatsthis", "<para>Go to "
+        "the folder that contains the currently viewed one.</para>"
+        "<para>All files and folders are organized in a hierarchical "
+        "<emphasis>file system</emphasis>. At the top of this hierarchy is "
+        "a directory that contains all data connected to this computer"
+        "—the <emphasis>root directory</emphasis>.</para>"));
     goUpAction->setEnabled(KIO::upUrl(currentUrl) != currentUrl);
 }
 
@@ -1408,20 +1796,19 @@ void DolphinMainWindow::createControlButton()
 
     m_controlButton = new QToolButton(this);
     m_controlButton->setIcon(QIcon::fromTheme(QStringLiteral("application-menu")));
-    m_controlButton->setText(i18nc("@action", "Control"));
+    m_controlButton->setToolTip(i18nc("@action", "Show menu"));
+    m_controlButton->setAttribute(Qt::WidgetAttribute::WA_CustomWhatsThis);
     m_controlButton->setPopupMode(QToolButton::InstantPopup);
-    m_controlButton->setToolButtonStyle(toolBar()->toolButtonStyle());
 
     QMenu* controlMenu = new QMenu(m_controlButton);
     connect(controlMenu, &QMenu::aboutToShow, this, &DolphinMainWindow::updateControlMenu);
+    controlMenu->installEventFilter(this);
 
     m_controlButton->setMenu(controlMenu);
 
     toolBar()->addWidget(m_controlButton);
     connect(toolBar(), &KToolBar::iconSizeChanged,
             m_controlButton, &QToolButton::setIconSize);
-    connect(toolBar(), &KToolBar::toolButtonStyleChanged,
-            m_controlButton, &QToolButton::setToolButtonStyle);
 
     // The added widgets are owned by the toolbar and may get deleted when e.g. the toolbar
     // gets edited. In this case we must add them again. The adding is done asynchronously by
@@ -1484,6 +1871,11 @@ void DolphinMainWindow::connectViewSignals(DolphinViewContainer* container)
             this, &DolphinMainWindow::updateFilterBarAction);
     connect(container, &DolphinViewContainer::writeStateChanged,
             this, &DolphinMainWindow::slotWriteStateChanged);
+    connect(container, &DolphinViewContainer::searchModeEnabledChanged,
+            this, &DolphinMainWindow::updateSearchAction);
+
+    const QAction* toggleSearchAction = actionCollection()->action(QStringLiteral("toggle_search"));
+    connect(toggleSearchAction, &QAction::triggered, container, &DolphinViewContainer::setSearchModeEnabled);
 
     const DolphinView* view = container->view();
     connect(view, &DolphinView::selectionChanged,
@@ -1501,9 +1893,9 @@ void DolphinMainWindow::connectViewSignals(DolphinViewContainer* container)
     connect(view, &DolphinView::directoryLoadingCompleted,
             this, &DolphinMainWindow::slotDirectoryLoadingCompleted);
     connect(view, &DolphinView::goBackRequested,
-            this, static_cast<void(DolphinMainWindow::*)()>(&DolphinMainWindow::goBack));
+            this, &DolphinMainWindow::goBack);
     connect(view, &DolphinView::goForwardRequested,
-            this, static_cast<void(DolphinMainWindow::*)()>(&DolphinMainWindow::goForward));
+            this, &DolphinMainWindow::goForward);
     connect(view, &DolphinView::urlActivated,
             this, &DolphinMainWindow::handleUrl);
 
@@ -1515,7 +1907,7 @@ void DolphinMainWindow::connectViewSignals(DolphinViewContainer* container)
     connect(navigator, &KUrlNavigator::editableStateChanged,
             this, &DolphinMainWindow::slotEditableStateChanged);
     connect(navigator, &KUrlNavigator::tabRequested,
-            this, &DolphinMainWindow::openNewTab);
+            this, &DolphinMainWindow::openNewTabAfterLastTab);
 }
 
 void DolphinMainWindow::updateSplitAction()
@@ -1523,7 +1915,7 @@ void DolphinMainWindow::updateSplitAction()
     QAction* splitAction = actionCollection()->action(QStringLiteral("split_view"));
     const DolphinTabPage* tabPage = m_tabWidget->currentTabPage();
     if (tabPage->splitViewEnabled()) {
-        if (tabPage->primaryViewActive()) {
+        if (GeneralSettings::closeActiveSplitView() ? tabPage->primaryViewActive() : !tabPage->primaryViewActive()) {
             splitAction->setText(i18nc("@action:intoolbar Close left view", "Close"));
             splitAction->setToolTip(i18nc("@info", "Close left view"));
             splitAction->setIcon(QIcon::fromTheme(QStringLiteral("view-left-close")));
@@ -1568,6 +1960,184 @@ void DolphinMainWindow::createPanelAction(const QIcon& icon,
     connect(dockAction, &QAction::toggled, panelAction, &QAction::setChecked);
 }
 
+void DolphinMainWindow::setupWhatsThis()
+{
+    // main widgets
+    menuBar()->setWhatsThis(xi18nc("@info:whatsthis", "<para>This is the "
+        "<emphasis>Menubar</emphasis>. It provides access to commands and "
+        "configuration options. Left-click on any of the menus on this "
+        "bar to see its contents.</para><para>The Menubar can be hidden "
+        "by unchecking <interface>Settings|Show Menubar</interface>. Then "
+        "most of its contents become available through a <interface>Control"
+        "</interface> button on the <emphasis>Toolbar</emphasis>.</para>"));
+    toolBar()->setWhatsThis(xi18nc("@info:whatsthis", "<para>This is the "
+        "<emphasis>Toolbar</emphasis>. It allows quick access to "
+        "frequently used actions.</para><para>It is highly customizable. "
+        "All items you see in the <interface>Control</interface> menu or "
+        "in the <interface>Menubar</interface> can be placed on the "
+        "Toolbar. Just right-click on it and select <interface>Configure "
+        "Toolbars…</interface> or find this action in the <interface>"
+        "Control</interface> or <interface>Settings</interface> menu."
+        "</para><para>The location of the bar and the style of its "
+        "buttons can also be changed in the right-click menu. Right-click "
+        "a button if you want to show or hide its text.</para>"));
+    m_tabWidget->setWhatsThis(xi18nc("@info:whatsthis main view",
+        "<para>Here you can see the <emphasis>folders</emphasis> and "
+        "<emphasis>files</emphasis> that are at the location described in "
+        "the <interface>Location Bar</interface> above. This area is the "
+        "central part of this application where you navigate to the files "
+        "you want to use.</para><para>For an elaborate and general "
+        "introduction to this application <link "
+        "url='https://userbase.kde.org/Dolphin/File_Management#Introduction_to_Dolphin'>"
+        "click here</link>. This will open an introductory article from "
+        "the <emphasis>KDE UserBase Wiki</emphasis>.</para><para>For brief "
+        "explanations of all the features of this <emphasis>view</emphasis> "
+        "<link url='help:/dolphin/dolphin-view.html'>click here</link> "
+        "instead. This will open a page from the <emphasis>Handbook"
+        "</emphasis> that covers the basics.</para>"));
+
+    // Settings menu
+    actionCollection()->action(KStandardAction::name(KStandardAction::KeyBindings))
+        ->setWhatsThis(xi18nc("@info:whatsthis","<para>This opens a window "
+        "that lists the <emphasis>keyboard shortcuts</emphasis>.<nl/>"
+        "There you can set up key combinations to trigger an action when "
+        "they are pressed simultaneously. All commands in this application can "
+        "be triggered this way.</para>"));
+    actionCollection()->action(KStandardAction::name(KStandardAction::ConfigureToolbars))
+        ->setWhatsThis(xi18nc("@info:whatsthis","<para>This opens a window in which "
+        "you can change which buttons appear on the <emphasis>Toolbar</emphasis>.</para>"
+        "<para>All items you see in the <interface>Control</interface> menu "
+        "or in the <interface>Menubar</interface> can also be placed on the Toolbar.</para>"));
+    actionCollection()->action(KStandardAction::name(KStandardAction::Preferences))
+        ->setWhatsThis(xi18nc("@info:whatsthis","This opens a window where you can "
+        "change a multitude of settings for this application. For an explanation "
+        "of the various settings go to the chapter <emphasis>Configuring Dolphin"
+        "</emphasis> in <interface>Help|Dolphin Handbook</interface>."));
+
+    // Help menu
+    // The whatsthis has to be set for the m_helpMenu and for the
+    // StandardAction separately because both are used in different locations.
+    // m_helpMenu is only used for createControlButton() button.
+
+    // Links do not work within the Menubar so texts without links are provided there.
+
+    // i18n: If the external link isn't available in your language you should
+    // probably state the external link language at least in brackets to not
+    // frustrate the user. If there are multiple languages that the user might
+    // know with a reasonable chance you might want to have 2 external links.
+    // The same is in my opinion true for every external link you translate.
+    const QString whatsThisHelpContents = xi18nc("@info:whatsthis handbook",
+        "<para>This opens the Handbook for this application. It provides "
+        "explanations for every part of <emphasis>Dolphin</emphasis>.</para>");
+    actionCollection()->action(KStandardAction::name(KStandardAction::HelpContents))
+        ->setWhatsThis(whatsThisHelpContents
+        + xi18nc("@info:whatsthis second half of handbook hb text without link",
+        "<para>If you want more elaborate introductions to the "
+        "different features of <emphasis>Dolphin</emphasis> "
+        "go to the KDE UserBase Wiki.</para>"));
+    m_helpMenu->action(KHelpMenu::menuHelpContents)->setWhatsThis(whatsThisHelpContents
+        + xi18nc("@info:whatsthis second half of handbook text with link",
+        "<para>If you want more elaborate introductions to the "
+        "different features of <emphasis>Dolphin</emphasis> "
+        "<link url='https://userbase.kde.org/Dolphin/File_Management'>click here</link>. "
+        "It will open the dedicated page in the KDE UserBase Wiki.</para>"));
+
+    const QString whatsThisWhatsThis = xi18nc("@info:whatsthis whatsthis button",
+        "<para>This is the button that invokes the help feature you are "
+        "using right now! Click it, then click any component of this "
+        "application to ask \"What's this?\" about it. The mouse cursor "
+        "will change appearance if no help is available for a spot.</para>");
+    actionCollection()->action(KStandardAction::name(KStandardAction::WhatsThis))
+       ->setWhatsThis(whatsThisWhatsThis
+        + xi18nc("@info:whatsthis second half of whatsthis button text without link",
+        "<para>There are two other ways to get help for this application: The "
+        "<interface>Dolphin Handbook</interface> in the <interface>Help"
+        "</interface> menu and the <emphasis>KDE UserBase Wiki</emphasis> "
+        "article about <emphasis>File Management</emphasis> online."
+        "</para><para>The \"What's this?\" help is "
+        "missing in most other windows so don't get too used to this.</para>"));
+    m_helpMenu->action(KHelpMenu::menuWhatsThis)->setWhatsThis(whatsThisWhatsThis
+        + xi18nc("@info:whatsthis second half of whatsthis button text with link",
+        "<para>There are two other ways to get help: "
+        "The <link url='help:/dolphin/index.html'>Dolphin Handbook</link> and "
+        "the <link url='https://userbase.kde.org/Dolphin/File_Management'>KDE "
+        "UserBase Wiki</link>.</para><para>The \"What's this?\" help is "
+        "missing in most other windows so don't get too used to this.</para>"));
+
+    const QString whatsThisReportBug = xi18nc("@info:whatsthis","<para>This opens a "
+        "window that will guide you through reporting errors or flaws "
+        "in this application or in other KDE software.</para>");
+    actionCollection()->action(KStandardAction::name(KStandardAction::ReportBug))
+       ->setWhatsThis(whatsThisReportBug);
+    m_helpMenu->action(KHelpMenu::menuReportBug)->setWhatsThis(whatsThisReportBug
+        + xi18nc("@info:whatsthis second half of reportbug text with link",
+        "<para>High-quality bug reports are much appreciated. To learn "
+        "how to make your bug report as effective as possible "
+        "<link url='https://community.kde.org/Get_Involved/Bug_Reporting'>"
+        "click here</link>.</para>"));
+
+    const QString whatsThisDonate = xi18nc("@info:whatsthis","<para>This opens a "
+        "<emphasis>web page</emphasis> where you can donate to "
+        "support the continued work on this application and many "
+        "other projects by the <emphasis>KDE</emphasis> community.</para>"
+        "<para>Donating is the easiest and fastest way to efficiently "
+        "support KDE and its projects. KDE projects are available for "
+        "free therefore your donation is needed to cover things that "
+        "require money like servers, contributor meetings, etc.</para>"
+        "<para><emphasis>KDE e.V.</emphasis> is the non-profit "
+        "organization behind the KDE community.</para>");
+    actionCollection()->action(KStandardAction::name(KStandardAction::Donate))
+       ->setWhatsThis(whatsThisDonate);
+    m_helpMenu->action(KHelpMenu::menuDonate)->setWhatsThis(whatsThisDonate);
+
+    const QString whatsThisSwitchLanguage = xi18nc("@info:whatsthis",
+        "With this you can change the language this application uses."
+        "<nl/>You can even set secondary languages which will be used "
+        "if texts are not available in your preferred language.");
+    actionCollection()->action(KStandardAction::name(KStandardAction::SwitchApplicationLanguage))
+       ->setWhatsThis(whatsThisSwitchLanguage);
+    m_helpMenu->action(KHelpMenu::menuSwitchLanguage)->setWhatsThis(whatsThisSwitchLanguage);
+
+    const QString whatsThisAboutApp = xi18nc("@info:whatsthis","This opens a "
+        "window that informs you about the version, license, "
+        "used libraries and maintainers of this application.");
+    actionCollection()->action(KStandardAction::name(KStandardAction::AboutApp))
+       ->setWhatsThis(whatsThisAboutApp);
+    m_helpMenu->action(KHelpMenu::menuAboutApp)->setWhatsThis(whatsThisAboutApp);
+
+    const QString whatsThisAboutKDE = xi18nc("@info:whatsthis","This opens a "
+        "window with information about <emphasis>KDE</emphasis>. "
+        "The KDE community are the people behind this free software."
+        "<nl/>If you like using this application but don't know "
+        "about KDE or want to see a cute dragon have a look!");
+    actionCollection()->action(KStandardAction::name(KStandardAction::AboutKDE))
+       ->setWhatsThis(whatsThisAboutKDE);
+    m_helpMenu->action(KHelpMenu::menuAboutKDE)->setWhatsThis(whatsThisAboutKDE);
+}
+
+bool DolphinMainWindow::event(QEvent *event)
+{
+    if (event->type() == QEvent::WhatsThisClicked) {
+        event->accept();
+        QWhatsThisClickedEvent* whatsThisEvent = dynamic_cast<QWhatsThisClickedEvent*>(event);
+        QDesktopServices::openUrl(QUrl(whatsThisEvent->href()));
+        return true;
+    }
+    return KXmlGuiWindow::event(event);
+}
+
+bool DolphinMainWindow::eventFilter(QObject* obj, QEvent* event)
+{
+    Q_UNUSED(obj)
+    if (event->type() == QEvent::WhatsThisClicked) {
+        event->accept();
+        QWhatsThisClickedEvent* whatsThisEvent = dynamic_cast<QWhatsThisClickedEvent*>(event);
+        QDesktopServices::openUrl(QUrl(whatsThisEvent->href()));
+        return true;
+    }
+    return false;
+}
+
 DolphinMainWindow::UndoUiInterface::UndoUiInterface() :
     KIO::FileUndoManager::UiInterface()
 {
@@ -1588,3 +2158,12 @@ void DolphinMainWindow::UndoUiInterface::jobError(KIO::Job* job)
     }
 }
 
+bool DolphinMainWindow::isUrlOpen(const QString& url)
+{
+    if (m_tabWidget->getIndexByUrl(QUrl::fromUserInput((url))).first >= 0) {
+        return true;
+    } else {
+        return false;
+    }
+}
+