Adress the third round of Angelaccio's review comments

Additionally remove some redundant code concerning UrlNavigator visuals.

src/dolphinnavigatorswidgetaction.cpp

@@ -201,7 +201,7 @@ QWidget *DolphinNavigatorsWidgetAction::createNavigatorWidget(Side side) const
     auto emptyTrashButton = newEmptyTrashButton(urlNavigator, navigatorWidget);
     layout->addWidget(emptyTrashButton);
 
-    connect(urlNavigator, &KUrlNavigator::urlChanged, [this]() {
+    connect(urlNavigator, &KUrlNavigator::urlChanged, this, [this]() {
         // We have to wait for DolphinUrlNavigator::sizeHint() to update which
         // happens a little bit later than when urlChanged is emitted.
         this->m_adjustSpacingTimer->start();
@@ -231,7 +231,7 @@ QPushButton *DolphinNavigatorsWidgetAction::newEmptyTrashButton(const DolphinUrl
     connect(&Trash::instance(), &Trash::emptinessChanged,
             emptyTrashButton, &QPushButton::setDisabled);
     emptyTrashButton->hide();
-    connect(urlNavigator, &KUrlNavigator::urlChanged, [emptyTrashButton, urlNavigator]() {
+    connect(urlNavigator, &KUrlNavigator::urlChanged, this, [emptyTrashButton, urlNavigator]() {
         emptyTrashButton->setVisible(urlNavigator->locationUrl().scheme() == QLatin1String("trash"));
     });
     emptyTrashButton->setDisabled(Trash::isEmpty());

src/dolphintabpage.cpp

@@ -159,11 +159,9 @@ void DolphinTabPage::connectNavigators(DolphinNavigatorsWidgetAction *navigators
 {
     m_navigatorsWidget = navigatorsWidget;
     auto primaryNavigator = navigatorsWidget->primaryUrlNavigator();
-    primaryNavigator->setActive(m_primaryViewActive);
     m_primaryViewContainer->connectUrlNavigator(primaryNavigator);
     if (m_splitViewEnabled) {
         auto secondaryNavigator = navigatorsWidget->secondaryUrlNavigator();
-        secondaryNavigator->setActive(!m_primaryViewActive);
         m_secondaryViewContainer->connectUrlNavigator(secondaryNavigator);
     }
     resizeNavigators();
@@ -178,12 +176,13 @@ void DolphinTabPage::disconnectNavigators()
     }
 }
 
-bool DolphinTabPage::eventFilter(QObject */* watched */, QEvent *event)
+bool DolphinTabPage::eventFilter(QObject *watched, QEvent *event)
 {
     if (event->type() == QEvent::Resize && m_navigatorsWidget) {
         resizeNavigators();
+        return false;
     }
-    return false;
+    return QWidget::eventFilter(watched, event);
 }
 
 void DolphinTabPage::resizeNavigators() const
@@ -292,11 +291,9 @@ void DolphinTabPage::restoreState(const QByteArray& state)
     stream >> m_primaryViewActive;
     if (m_primaryViewActive) {
         m_primaryViewContainer->setActive(true);
-        m_navigatorsWidget->primaryUrlNavigator()->setActive(true);
     } else {
         Q_ASSERT(m_splitViewEnabled);
         m_secondaryViewContainer->setActive(true);
-        m_navigatorsWidget->primaryUrlNavigator()->setActive(false);
     }
 
     QByteArray splitterState;

src/dolphintabpage.h

@@ -83,7 +83,7 @@ public:
     /**
      * Calls resizeNavigators() when a watched object is resized.
      */
-    bool eventFilter(QObject */* watched */, QEvent *event) override;
+    bool eventFilter(QObject *watched, QEvent *event) override;
 
     /**
      * Notify the connected DolphinNavigatorsWidgetAction of geometry changes which it

src/dolphintabwidget.cpp

@@ -406,7 +406,7 @@ void DolphinTabWidget::currentTabChanged(int index)
     tabPage->setActive(true);
     tabPage->connectNavigators(m_navigatorsWidget);
     m_navigatorsWidget->setSecondaryNavigatorVisible(tabPage->splitViewEnabled());
-    m_lastViewedTab = tabPageAt(index);
+    m_lastViewedTab = tabPage;
 }
 
 void DolphinTabWidget::tabInserted(int index)

src/dolphinurlnavigator.cpp

@@ -47,10 +47,8 @@ DolphinUrlNavigator::DolphinUrlNavigator(const QUrl &url, QWidget *parent) :
 
     DolphinUrlNavigatorsController::registerDolphinUrlNavigator(this);
 
-    connect(this, &DolphinUrlNavigator::returnPressed,
+    connect(this, &KUrlNavigator::returnPressed,
             this, &DolphinUrlNavigator::slotReturnPressed);
-    connect(editor(), &KUrlComboBox::completionModeChanged,
-            DolphinUrlNavigatorsController::setCompletionMode);
 }
 
 DolphinUrlNavigator::~DolphinUrlNavigator()

src/dolphinurlnavigator.h

@@ -15,8 +15,9 @@
  *
  * Makes sure that Dolphin preferences and settings are
  * applied to all constructed DolphinUrlNavigators.
- *
  * @see KUrlNavigator
+ *
+ * To apply changes to all instances of this class @see DolphinUrlNavigatorsController.
  */
 class DolphinUrlNavigator : public KUrlNavigator
 {
@@ -55,6 +56,9 @@ public:
     /**
      * Retrieve the visual state of this DolphinUrlNavigator.
      * If two DolphinUrlNavigators have the same visual state they should look identical.
+     *
+     * @return a copy of the visualState of this object. Ownership of this copy is transferred
+     *         to the caller via std::unique_ptr.
      */
     std::unique_ptr<VisualState> visualState() const;
     /**

src/dolphinurlnavigatorscontroller.cpp

@@ -46,6 +46,8 @@ bool DolphinUrlNavigatorsController::placesSelectorVisible()
 void DolphinUrlNavigatorsController::registerDolphinUrlNavigator(DolphinUrlNavigator *dolphinUrlNavigator)
 {
     s_instances.push_front(dolphinUrlNavigator);
+    connect(dolphinUrlNavigator->editor(), &KUrlComboBox::completionModeChanged,
+            DolphinUrlNavigatorsController::setCompletionMode);
 }
 
 void DolphinUrlNavigatorsController::unregisterDolphinUrlNavigator(DolphinUrlNavigator *dolphinUrlNavigator)

src/dolphinviewcontainer.cpp

@@ -291,11 +291,11 @@ void DolphinViewContainer::connectUrlNavigator(DolphinUrlNavigator *urlNavigator
     Q_CHECK_PTR(m_view);
 
     urlNavigator->setLocationUrl(m_view->url());
-    urlNavigator->setActive(isActive());
     if (m_urlNavigatorVisualState) {
         urlNavigator->setVisualState(*m_urlNavigatorVisualState.get());
         m_urlNavigatorVisualState.reset();
     }
+    urlNavigator->setActive(isActive());
 
     connect(m_view, &DolphinView::urlChanged,
             urlNavigator, &DolphinUrlNavigator::setLocationUrl);
@@ -307,7 +307,8 @@ void DolphinViewContainer::connectUrlNavigator(DolphinUrlNavigator *urlNavigator
             this, &DolphinViewContainer::slotUrlNavigatorLocationAboutToBeChanged);
     connect(urlNavigator, &DolphinUrlNavigator::urlSelectionRequested,
             this, &DolphinViewContainer::slotUrlSelectionRequested);
-    connect(urlNavigator, &DolphinUrlNavigator::urlsDropped, this, [=](const QUrl &destination, QDropEvent *event) {
+    connect(urlNavigator, &DolphinUrlNavigator::urlsDropped,
+            this, [=](const QUrl &destination, QDropEvent *event) {
         m_view->dropUrls(destination, event, urlNavigator->dropWidget());
     });