Modernize: Use nullptr everywhere

49 files changed, 149 insertions, 149 deletions

diff --git a/src/kitemviews/kfileitemlistview.cpp b/src/kitemviews/kfileitemlistview.cpp
index c17d54367..41f8aeade 100644
--- a/src/kitemviews/kfileitemlistview.cpp
+++ b/src/kitemviews/kfileitemlistview.cpp
@@ -49,9 +49,9 @@ namespace {
 
 KFileItemListView::KFileItemListView(QGraphicsWidget* parent) :
     KStandardItemListView(parent),
-    m_modelRolesUpdater(0),
-    m_updateVisibleIndexRangeTimer(0),
-    m_updateIconSizeTimer(0)
+    m_modelRolesUpdater(nullptr),
+    m_updateVisibleIndexRangeTimer(nullptr),
+    m_updateIconSizeTimer(nullptr)
 {
     setAcceptDrops(true);
 
@@ -229,7 +229,7 @@ void KFileItemListView::onModelChanged(KItemModelBase* current, KItemModelBase*
     KStandardItemListView::onModelChanged(current, previous);
 
     delete m_modelRolesUpdater;
-    m_modelRolesUpdater = 0;
+    m_modelRolesUpdater = nullptr;
 
     if (current) {
         m_modelRolesUpdater = new KFileItemModelRolesUpdater(static_cast<KFileItemModel*>(current), this);
diff --git a/src/kitemviews/kfileitemlistview.h b/src/kitemviews/kfileitemlistview.h
index c1c260e93..95ad9ba68 100644
--- a/src/kitemviews/kfileitemlistview.h
+++ b/src/kitemviews/kfileitemlistview.h
@@ -41,7 +41,7 @@ class DOLPHIN_EXPORT KFileItemListView : public KStandardItemListView
     Q_OBJECT
 
 public:
-    KFileItemListView(QGraphicsWidget* parent = 0);
+    KFileItemListView(QGraphicsWidget* parent = nullptr);
     ~KFileItemListView() override;
 
     void setPreviewsShown(bool show);
diff --git a/src/kitemviews/kfileitemmodel.cpp b/src/kitemviews/kfileitemmodel.cpp
index 8f89b89df..08520c9f6 100644
--- a/src/kitemviews/kfileitemmodel.cpp
+++ b/src/kitemviews/kfileitemmodel.cpp
@@ -42,7 +42,7 @@
 
 KFileItemModel::KFileItemModel(QObject* parent) :
     KItemModelBase("text", parent),
-    m_dirLister(0),
+    m_dirLister(nullptr),
     m_sortDirsFirst(true),
     m_sortRole(NameRole),
     m_sortingProgressPercent(-1),
@@ -52,8 +52,8 @@ KFileItemModel::KFileItemModel(QObject* parent) :
     m_filter(),
     m_filteredItems(),
     m_requestRole(),
-    m_maximumUpdateIntervalTimer(0),
-    m_resortAllItemsTimer(0),
+    m_maximumUpdateIntervalTimer(nullptr),
+    m_resortAllItemsTimer(nullptr),
     m_pendingItemsToInsert(),
     m_groups(),
     m_expandedDirs(),
@@ -251,7 +251,7 @@ QMimeData* KFileItemModel::createMimeData(const KItemSet& indexes) const
     QList<QUrl> urls;
     QList<QUrl> mostLocalUrls;
     bool canUseMostLocalUrls = true;
-    const ItemData* lastAddedItem = 0;
+    const ItemData* lastAddedItem = nullptr;
 
     for (int index : indexes) {
         const ItemData* itemData = m_itemData.at(index);
@@ -2295,16 +2295,16 @@ const KFileItemModel::RoleInfoMap* KFileItemModel::rolesInfoMap(int& count)
 {
     static const RoleInfoMap rolesInfoMap[] = {
     //  | role         | roleType       | role translation                                | group translation           | requires Baloo   | requires indexer
-        { 0,             NoRole,          0, 0,                                             0, 0,                                     false, false },
-        { "text",        NameRole,        I18N_NOOP2_NOSTRIP("@label", "Name"),             0, 0,                                     false, false },
-        { "size",        SizeRole,        I18N_NOOP2_NOSTRIP("@label", "Size"),             0, 0,                                     false, false },
-        { "modificationtime",        ModificationTimeRole,        I18N_NOOP2_NOSTRIP("@label", "Modified"),             0, 0,                                     false, false },
-        { "creationtime",        CreationTimeRole,        I18N_NOOP2_NOSTRIP("@label", "Created"),             0, 0,                                     false, false },
-        { "accesstime",        AccessTimeRole,        I18N_NOOP2_NOSTRIP("@label", "Accessed"),             0, 0,                                     false, false },
-        { "type",        TypeRole,        I18N_NOOP2_NOSTRIP("@label", "Type"),             0, 0,                                     false, false },
-        { "rating",      RatingRole,      I18N_NOOP2_NOSTRIP("@label", "Rating"),           0, 0,                                     true,  false },
-        { "tags",        TagsRole,        I18N_NOOP2_NOSTRIP("@label", "Tags"),             0, 0,                                     true,  false },
-        { "comment",     CommentRole,     I18N_NOOP2_NOSTRIP("@label", "Comment"),          0, 0,                                     true,  false },
+        { nullptr,             NoRole,          nullptr, nullptr,                                             nullptr, nullptr,                                     false, false },
+        { "text",        NameRole,        I18N_NOOP2_NOSTRIP("@label", "Name"),             nullptr, nullptr,                                     false, false },
+        { "size",        SizeRole,        I18N_NOOP2_NOSTRIP("@label", "Size"),             nullptr, nullptr,                                     false, false },
+        { "modificationtime",        ModificationTimeRole,        I18N_NOOP2_NOSTRIP("@label", "Modified"),             nullptr, nullptr,                                     false, false },
+        { "creationtime",        CreationTimeRole,        I18N_NOOP2_NOSTRIP("@label", "Created"),             nullptr, nullptr,                                     false, false },
+        { "accesstime",        AccessTimeRole,        I18N_NOOP2_NOSTRIP("@label", "Accessed"),             nullptr, nullptr,                                     false, false },
+        { "type",        TypeRole,        I18N_NOOP2_NOSTRIP("@label", "Type"),             nullptr, nullptr,                                     false, false },
+        { "rating",      RatingRole,      I18N_NOOP2_NOSTRIP("@label", "Rating"),           nullptr, nullptr,                                     true,  false },
+        { "tags",        TagsRole,        I18N_NOOP2_NOSTRIP("@label", "Tags"),             nullptr, nullptr,                                     true,  false },
+        { "comment",     CommentRole,     I18N_NOOP2_NOSTRIP("@label", "Comment"),          nullptr, nullptr,                                     true,  false },
         { "title",       TitleRole,       I18N_NOOP2_NOSTRIP("@label", "Title"),            I18N_NOOP2_NOSTRIP("@label", "Document"), true,  true  },
         { "wordCount",   WordCountRole,   I18N_NOOP2_NOSTRIP("@label", "Word Count"),       I18N_NOOP2_NOSTRIP("@label", "Document"), true,  true  },
         { "lineCount",   LineCountRole,   I18N_NOOP2_NOSTRIP("@label", "Line Count"),       I18N_NOOP2_NOSTRIP("@label", "Document"), true,  true  },
diff --git a/src/kitemviews/kfileitemmodel.h b/src/kitemviews/kfileitemmodel.h
index 3cd119dc8..8d721aa56 100644
--- a/src/kitemviews/kfileitemmodel.h
+++ b/src/kitemviews/kfileitemmodel.h
@@ -50,7 +50,7 @@ class DOLPHIN_EXPORT KFileItemModel : public KItemModelBase
     Q_OBJECT
 
 public:
-    explicit KFileItemModel(QObject* parent = 0);
+    explicit KFileItemModel(QObject* parent = nullptr);
     ~KFileItemModel() override;
 
     /**
diff --git a/src/kitemviews/kfileitemmodelrolesupdater.cpp b/src/kitemviews/kfileitemmodelrolesupdater.cpp
index 11d01b2cf..a08f1ae15 100644
--- a/src/kitemviews/kfileitemmodelrolesupdater.cpp
+++ b/src/kitemviews/kfileitemmodelrolesupdater.cpp
@@ -88,12 +88,12 @@ KFileItemModelRolesUpdater::KFileItemModelRolesUpdater(KFileItemModel* model, QO
     m_pendingIndexes(),
     m_pendingPreviewItems(),
     m_previewJob(),
-    m_recentlyChangedItemsTimer(0),
+    m_recentlyChangedItemsTimer(nullptr),
     m_recentlyChangedItems(),
     m_changedItems(),
-    m_directoryContentsCounter(0)
+    m_directoryContentsCounter(nullptr)
   #ifdef HAVE_BALOO
-  , m_balooFileMonitor(0)
+  , m_balooFileMonitor(nullptr)
   #endif
 {
     Q_ASSERT(model);
@@ -296,7 +296,7 @@ void KFileItemModelRolesUpdater::setRoles(const QSet<QByteArray>& roles)
                     this, &KFileItemModelRolesUpdater::applyChangedBalooRoles);
         } else if (!hasBalooRole && m_balooFileMonitor) {
             delete m_balooFileMonitor;
-            m_balooFileMonitor = 0;
+            m_balooFileMonitor = nullptr;
         }
 #endif
 
@@ -594,7 +594,7 @@ void KFileItemModelRolesUpdater::slotPreviewFailed(const KFileItem& item)
 
 void KFileItemModelRolesUpdater::slotPreviewJobFinished()
 {
-    m_previewJob = 0;
+    m_previewJob = nullptr;
 
     if (m_state != PreviewJobRunning) {
         return;
@@ -1138,7 +1138,7 @@ void KFileItemModelRolesUpdater::killPreviewJob()
         disconnect(m_previewJob,  &KIO::PreviewJob::finished,
                    this, &KFileItemModelRolesUpdater::slotPreviewJobFinished);
         m_previewJob->kill();
-        m_previewJob = 0;
+        m_previewJob = nullptr;
         m_pendingPreviewItems.clear();
     }
 }
diff --git a/src/kitemviews/kfileitemmodelrolesupdater.h b/src/kitemviews/kfileitemmodelrolesupdater.h
index 15d46d79e..d971a7c17 100644
--- a/src/kitemviews/kfileitemmodelrolesupdater.h
+++ b/src/kitemviews/kfileitemmodelrolesupdater.h
@@ -94,7 +94,7 @@ class DOLPHIN_EXPORT KFileItemModelRolesUpdater : public QObject
     Q_OBJECT
 
 public:
-    explicit KFileItemModelRolesUpdater(KFileItemModel* model, QObject* parent = 0);
+    explicit KFileItemModelRolesUpdater(KFileItemModel* model, QObject* parent = nullptr);
     ~KFileItemModelRolesUpdater() override;
 
     void setIconSize(const QSize& size);
diff --git a/src/kitemviews/kitemlistcontainer.cpp b/src/kitemviews/kitemlistcontainer.cpp
index 8bab6cfad..8e64ee493 100644
--- a/src/kitemviews/kitemlistcontainer.cpp
+++ b/src/kitemviews/kitemlistcontainer.cpp
@@ -70,8 +70,8 @@ void KItemListContainerViewport::wheelEvent(QWheelEvent* event)
 KItemListContainer::KItemListContainer(KItemListController* controller, QWidget* parent) :
     QAbstractScrollArea(parent),
     m_controller(controller),
-    m_horizontalSmoothScroller(0),
-    m_verticalSmoothScroller(0)
+    m_horizontalSmoothScroller(nullptr),
+    m_verticalSmoothScroller(nullptr)
 {
     Q_ASSERT(controller);
     controller->setParent(this);
@@ -83,10 +83,10 @@ KItemListContainer::KItemListContainer(KItemListController* controller, QWidget*
     m_verticalSmoothScroller = new KItemListSmoothScroller(verticalScrollBar(), this);
 
     if (controller->model()) {
-        slotModelChanged(controller->model(), 0);
+        slotModelChanged(controller->model(), nullptr);
     }
     if (controller->view()) {
-        slotViewChanged(controller->view(), 0);
+        slotViewChanged(controller->view(), nullptr);
     }
 
     connect(controller, &KItemListController::modelChanged,
@@ -100,7 +100,7 @@ KItemListContainer::~KItemListContainer()
     // Don't rely on the QObject-order to delete the controller, otherwise
     // the QGraphicsScene might get deleted before the view.
     delete m_controller;
-    m_controller = 0;
+    m_controller = nullptr;
 }
 
 KItemListController* KItemListContainer::controller() const
@@ -216,8 +216,8 @@ void KItemListContainer::slotViewChanged(KItemListView* current, KItemListView*
         disconnect(previous, &KItemListView::maximumItemOffsetChanged,
                    this, &KItemListContainer::updateItemOffsetScrollBar);
         disconnect(previous, &KItemListView::scrollTo, this, &KItemListContainer::scrollTo);
-        m_horizontalSmoothScroller->setTargetObject(0);
-        m_verticalSmoothScroller->setTargetObject(0);
+        m_horizontalSmoothScroller->setTargetObject(nullptr);
+        m_verticalSmoothScroller->setTargetObject(nullptr);
     }
     if (current) {
         scene->addItem(current);
@@ -257,8 +257,8 @@ void KItemListContainer::updateScrollOffsetScrollBar()
         return;
     }
 
-    KItemListSmoothScroller* smoothScroller = 0;
-    QScrollBar* scrollOffsetScrollBar = 0;
+    KItemListSmoothScroller* smoothScroller = nullptr;
+    QScrollBar* scrollOffsetScrollBar = nullptr;
     int singleStep = 0;
     int pageStep = 0;
     int maximum = 0;
@@ -308,8 +308,8 @@ void KItemListContainer::updateItemOffsetScrollBar()
         return;
     }
 
-    KItemListSmoothScroller* smoothScroller = 0;
-    QScrollBar* itemOffsetScrollBar = 0;
+    KItemListSmoothScroller* smoothScroller = nullptr;
+    QScrollBar* itemOffsetScrollBar = nullptr;
     int singleStep = 0;
     int pageStep = 0;
     if (view->scrollOrientation() == Qt::Vertical) {
diff --git a/src/kitemviews/kitemlistcontainer.h b/src/kitemviews/kitemlistcontainer.h
index dc7b19e20..c5ef85563 100644
--- a/src/kitemviews/kitemlistcontainer.h
+++ b/src/kitemviews/kitemlistcontainer.h
@@ -50,7 +50,7 @@ public:
      *                   (the parent will be set to the KItemListContainer).
      * @param parent     Optional parent widget.
      */
-    explicit KItemListContainer(KItemListController* controller, QWidget* parent = 0);
+    explicit KItemListContainer(KItemListController* controller, QWidget* parent = nullptr);
     ~KItemListContainer() override;
     KItemListController* controller() const;
 
diff --git a/src/kitemviews/kitemlistcontroller.cpp b/src/kitemviews/kitemlistcontroller.cpp
index 008b6c4c6..61f520641 100644
--- a/src/kitemviews/kitemlistcontroller.cpp
+++ b/src/kitemviews/kitemlistcontroller.cpp
@@ -49,13 +49,13 @@ KItemListController::KItemListController(KItemModelBase* model, KItemListView* v
     m_selectionBehavior(NoSelection),
     m_autoActivationBehavior(ActivationAndExpansion),
     m_mouseDoubleClickAction(ActivateItemOnly),
-    m_model(0),
-    m_view(0),
+    m_model(nullptr),
+    m_view(nullptr),
     m_selectionManager(new KItemListSelectionManager(this)),
     m_keyboardManager(new KItemListKeyboardSearchManager(this)),
     m_pressedIndex(-1),
     m_pressedMousePos(),
-    m_autoActivationTimer(0),
+    m_autoActivationTimer(nullptr),
     m_oldSelection(),
     m_keyboardAnchorIndex(-1),
     m_keyboardAnchorPos(0)
@@ -76,10 +76,10 @@ KItemListController::KItemListController(KItemModelBase* model, KItemListView* v
 
 KItemListController::~KItemListController()
 {
-    setView(0);
+    setView(nullptr);
     Q_ASSERT(!m_view);
 
-    setModel(0);
+    setModel(nullptr);
     Q_ASSERT(!m_model);
 }
 
@@ -1216,7 +1216,7 @@ KItemListWidget* KItemListController::hoveredWidget() const
         }
     }
 
-    return 0;
+    return nullptr;
 }
 
 KItemListWidget* KItemListController::widgetForPos(const QPointF& pos) const
@@ -1233,7 +1233,7 @@ KItemListWidget* KItemListController::widgetForPos(const QPointF& pos) const
         }
     }
 
-    return 0;
+    return nullptr;
 }
 
 void KItemListController::updateKeyboardAnchor()
diff --git a/src/kitemviews/kitemlistcontroller.h b/src/kitemviews/kitemlistcontroller.h
index ff0171a02..7c48fb18c 100644
--- a/src/kitemviews/kitemlistcontroller.h
+++ b/src/kitemviews/kitemlistcontroller.h
@@ -88,7 +88,7 @@ public:
      * @param view   View of the controller. The ownership is passed to the controller.
      * @param parent Optional parent object.
      */
-    KItemListController(KItemModelBase* model, KItemListView* view, QObject* parent = 0);
+    KItemListController(KItemModelBase* model, KItemListView* view, QObject* parent = nullptr);
     ~KItemListController() override;
 
     void setModel(KItemModelBase* model);
diff --git a/src/kitemviews/kitemlistgroupheader.cpp b/src/kitemviews/kitemlistgroupheader.cpp
index f8576b08c..fb9298989 100644
--- a/src/kitemviews/kitemlistgroupheader.cpp
+++ b/src/kitemviews/kitemlistgroupheader.cpp
@@ -29,7 +29,7 @@
 #include <QStyleOptionGraphicsItem>
 
 KItemListGroupHeader::KItemListGroupHeader(QGraphicsWidget* parent) :
-    QGraphicsWidget(parent, 0),
+    QGraphicsWidget(parent, nullptr),
     m_dirtyCache(true),
     m_role(),
     m_data(),
diff --git a/src/kitemviews/kitemlistgroupheader.h b/src/kitemviews/kitemlistgroupheader.h
index f720076df..6a8bd76e8 100644
--- a/src/kitemviews/kitemlistgroupheader.h
+++ b/src/kitemviews/kitemlistgroupheader.h
@@ -42,7 +42,7 @@ class DOLPHIN_EXPORT KItemListGroupHeader : public QGraphicsWidget
     Q_OBJECT
 
 public:
-    KItemListGroupHeader(QGraphicsWidget* parent = 0);
+    KItemListGroupHeader(QGraphicsWidget* parent = nullptr);
     ~KItemListGroupHeader() override;
 
     void setRole(const QByteArray& role);
@@ -65,7 +65,7 @@ public:
     void setItemIndex(int index);
     int itemIndex() const;
 
-    void paint(QPainter* painter, const QStyleOptionGraphicsItem* option, QWidget* widget = 0) override;
+    void paint(QPainter* painter, const QStyleOptionGraphicsItem* option, QWidget* widget = nullptr) override;
 
 protected:
     virtual void paintRole(QPainter* painter, const QRectF& roleBounds, const QColor& color) = 0;
diff --git a/src/kitemviews/kitemlistselectionmanager.cpp b/src/kitemviews/kitemlistselectionmanager.cpp
index 46ffe7c13..5d7b08eeb 100644
--- a/src/kitemviews/kitemlistselectionmanager.cpp
+++ b/src/kitemviews/kitemlistselectionmanager.cpp
@@ -31,7 +31,7 @@ KItemListSelectionManager::KItemListSelectionManager(QObject* parent) :
     m_anchorItem(-1),
     m_selectedItems(),
     m_isAnchoredSelectionActive(false),
-    m_model(0)
+    m_model(nullptr)
 {
 }
 
diff --git a/src/kitemviews/kitemlistselectionmanager.h b/src/kitemviews/kitemlistselectionmanager.h
index d8faac4cd..54c2cc062 100644
--- a/src/kitemviews/kitemlistselectionmanager.h
+++ b/src/kitemviews/kitemlistselectionmanager.h
@@ -51,7 +51,7 @@ public:
         Toggle
     };
 
-    KItemListSelectionManager(QObject* parent = 0);
+    KItemListSelectionManager(QObject* parent = nullptr);
     ~KItemListSelectionManager() override;
 
     void setCurrentItem(int current);
diff --git a/src/kitemviews/kitemlistview.cpp b/src/kitemviews/kitemlistview.cpp
index d26809797..71091033c 100644
--- a/src/kitemviews/kitemlistview.cpp
+++ b/src/kitemviews/kitemlistview.cpp
@@ -67,7 +67,7 @@ QAccessibleInterface* accessibleInterfaceFactory(const QString& key, QObject* ob
         return new KItemListViewAccessible(view);
     }
 
-    return 0;
+    return nullptr;
 }
 #endif
 
@@ -80,30 +80,30 @@ KItemListView::KItemListView(QGraphicsWidget* parent) :
     m_activeTransactions(0),
     m_endTransactionAnimationHint(Animation),
     m_itemSize(),
-    m_controller(0),
-    m_model(0),
+    m_controller(nullptr),
+    m_model(nullptr),
     m_visibleRoles(),
-    m_widgetCreator(0),
-    m_groupHeaderCreator(0),
+    m_widgetCreator(nullptr),
+    m_groupHeaderCreator(nullptr),
     m_styleOption(),
     m_visibleItems(),
     m_visibleGroups(),
     m_visibleCells(),
-    m_sizeHintResolver(0),
-    m_layouter(0),
-    m_animation(0),
-    m_layoutTimer(0),
+    m_sizeHintResolver(nullptr),
+    m_layouter(nullptr),
+    m_animation(nullptr),
+    m_layoutTimer(nullptr),
     m_oldScrollOffset(0),
     m_oldMaximumScrollOffset(0),
     m_oldItemOffset(0),
     m_oldMaximumItemOffset(0),
     m_skipAutoScrollForRubberBand(false),
-    m_rubberBand(0),
+    m_rubberBand(nullptr),
     m_mousePos(),
     m_autoScrollIncrement(0),
-    m_autoScrollTimer(0),
-    m_header(0),
-    m_headerWidget(0),
+    m_autoScrollTimer(nullptr),
+    m_header(nullptr),
+    m_headerWidget(nullptr),
     m_dropIndicator()
 {
     setAcceptHoverEvents(true);
@@ -141,13 +141,13 @@ KItemListView::~KItemListView()
     // widgetCreator(). So it is mandatory to delete the group headers
     // first.
     delete m_groupHeaderCreator;
-    m_groupHeaderCreator = 0;
+    m_groupHeaderCreator = nullptr;
 
     delete m_widgetCreator;
-    m_widgetCreator = 0;
+    m_widgetCreator = nullptr;
 
     delete m_sizeHintResolver;
-    m_sizeHintResolver = 0;
+    m_sizeHintResolver = nullptr;
 }
 
 void KItemListView::setScrollOffset(qreal offset)
@@ -270,13 +270,13 @@ void KItemListView::setAutoScroll(bool enabled)
         m_autoScrollTimer->start(InitialAutoScrollDelay);
     } else if (!enabled && m_autoScrollTimer) {
         delete m_autoScrollTimer;
-        m_autoScrollTimer = 0;
+        m_autoScrollTimer = nullptr;
     }
 }
 
 bool KItemListView::autoScroll() const
 {
-    return m_autoScrollTimer != 0;
+    return m_autoScrollTimer != nullptr;
 }
 
 void KItemListView::setEnabledSelectionToggles(bool enabled)
@@ -629,7 +629,7 @@ QPixmap KItemListView::createDragPixmap(const KItemSet& indexes) const
         KItemListWidget* item = m_visibleItems.value(indexes.first());
         QGraphicsView* graphicsView = scene()->views()[0];
         if (item && graphicsView) {
-            pixmap = item->createDragPixmap(0, graphicsView);
+            pixmap = item->createDragPixmap(nullptr, graphicsView);
         }
     } else {
         // TODO: Not implemented yet. Probably extend the interface
@@ -834,12 +834,12 @@ Qt::Orientation KItemListView::scrollOrientation() const
 
 KItemListWidgetCreatorBase* KItemListView::defaultWidgetCreator() const
 {
-    return 0;
+    return nullptr;
 }
 
 KItemListGroupHeaderCreatorBase* KItemListView::defaultGroupHeaderCreator() const
 {
-    return 0;
+    return nullptr;
 }
 
 void KItemListView::initializeItemListWidget(KItemListWidget* item)
@@ -2090,7 +2090,7 @@ void KItemListView::recycleGroupHeaderForWidget(KItemListWidget* widget)
 {
     KItemListGroupHeader* header = m_visibleGroups.value(widget);
     if (header) {
-        header->setParentItem(0);
+        header->setParentItem(nullptr);
         groupHeaderCreator()->recycle(header);
         m_visibleGroups.remove(widget);
         disconnect(widget, &KItemListWidget::geometryChanged, this, &KItemListView::slotGeometryOfGroupHeaderParentChanged);
@@ -2551,7 +2551,7 @@ void KItemListView::updateSiblingsInformation(int firstIndex, int lastIndex)
             const int parents = m_model->expandedParentsCount(lastIndex + 1);
             for (int i = lastIndex; i >= firstIndex; --i) {
                 if (m_model->expandedParentsCount(i) != parents) {
-                    widget = 0;
+                    widget = nullptr;
                     break;
                 }
             }
@@ -2714,7 +2714,7 @@ void KItemListCreatorBase::pushRecycleableWidget(QGraphicsWidget* widget)
 QGraphicsWidget* KItemListCreatorBase::popRecycleableWidget()
 {
     if (m_recycleableWidgets.isEmpty()) {
-        return 0;
+        return nullptr;
     }
 
     QGraphicsWidget* widget = m_recycleableWidgets.takeLast();
@@ -2728,7 +2728,7 @@ KItemListWidgetCreatorBase::~KItemListWidgetCreatorBase()
 
 void KItemListWidgetCreatorBase::recycle(KItemListWidget* widget)
 {
-    widget->setParentItem(0);
+    widget->setParentItem(nullptr);
     widget->setOpacity(1.0);
     pushRecycleableWidget(widget);
 }
diff --git a/src/kitemviews/kitemlistview.h b/src/kitemviews/kitemlistview.h
index 3415d52ec..e3793e10e 100644
--- a/src/kitemviews/kitemlistview.h
+++ b/src/kitemviews/kitemlistview.h
@@ -67,7 +67,7 @@ class DOLPHIN_EXPORT KItemListView : public QGraphicsWidget
     Q_PROPERTY(qreal itemOffset READ itemOffset WRITE setItemOffset)
 
 public:
-    KItemListView(QGraphicsWidget* parent = 0);
+    KItemListView(QGraphicsWidget* parent = nullptr);
     ~KItemListView() override;
 
     /**
@@ -285,7 +285,7 @@ public:
      */
     void editRole(int index, const QByteArray& role);
 
-    void paint(QPainter* painter, const QStyleOptionGraphicsItem* option, QWidget* widget = 0) override;
+    void paint(QPainter* painter, const QStyleOptionGraphicsItem* option, QWidget* widget = nullptr) override;
 
 signals:
     void scrollOrientationChanged(Qt::Orientation current, Qt::Orientation previous);
diff --git a/src/kitemviews/kitemlistviewaccessible.cpp b/src/kitemviews/kitemlistviewaccessible.cpp
index 6f06e243e..c593dad82 100644
--- a/src/kitemviews/kitemlistviewaccessible.cpp
+++ b/src/kitemviews/kitemlistviewaccessible.cpp
@@ -60,7 +60,7 @@ void* KItemListViewAccessible::interface_cast(QAccessible::InterfaceType type)
     if (type == QAccessible::TableInterface) {
         return static_cast<QAccessibleTableInterface*>(this);
     }
-    return Q_NULLPTR;
+    return nullptr;
 }
 
 void KItemListViewAccessible::modelReset()
@@ -70,7 +70,7 @@ void KItemListViewAccessible::modelReset()
 QAccessibleInterface* KItemListViewAccessible::cell(int index) const
 {
     if (index < 0 || index >= view()->model()->count()) {
-        return 0;
+        return nullptr;
     }
 
     if (m_cells.size() <= index) {
@@ -93,7 +93,7 @@ QAccessibleInterface* KItemListViewAccessible::cellAt(int row, int column) const
 
 QAccessibleInterface* KItemListViewAccessible::caption() const
 {
-    return 0;
+    return nullptr;
 }
 
 QString KItemListViewAccessible::columnDescription(int) const
@@ -168,7 +168,7 @@ QList<int> KItemListViewAccessible::selectedRows() const
 
 QAccessibleInterface* KItemListViewAccessible::summary() const
 {
-    return 0;
+    return nullptr;
 }
 
 bool KItemListViewAccessible::isColumnSelected(int) const
@@ -225,7 +225,7 @@ QAccessibleInterface* KItemListViewAccessible::childAt(int x, int y) const
 QAccessibleInterface* KItemListViewAccessible::parent() const
 {
     // FIXME: return KItemListContainerAccessible here
-    return Q_NULLPTR;
+    return nullptr;
 }
 
 int KItemListViewAccessible::childCount() const
@@ -265,7 +265,7 @@ QAccessibleInterface* KItemListViewAccessible::child(int index) const
     if (index >= 0 && index < childCount()) {
         return cell(index);
     }
-    return Q_NULLPTR;
+    return nullptr;
 }
 
 // Table Cell
@@ -282,7 +282,7 @@ void* KItemListAccessibleCell::interface_cast(QAccessible::InterfaceType type)
     if (type == QAccessible::TableCellInterface) {
         return static_cast<QAccessibleTableCellInterface*>(this);
     }
-    return Q_NULLPTR;
+    return nullptr;
 }
 
 int KItemListAccessibleCell::columnExtent() const
@@ -398,7 +398,7 @@ void KItemListAccessibleCell::setText(QAccessible::Text, const QString&)
 
 QAccessibleInterface* KItemListAccessibleCell::child(int) const
 {
-    return Q_NULLPTR;
+    return nullptr;
 }
 
 bool KItemListAccessibleCell::isValid() const
@@ -408,7 +408,7 @@ bool KItemListAccessibleCell::isValid() const
 
 QAccessibleInterface* KItemListAccessibleCell::childAt(int, int) const
 {
-    return Q_NULLPTR;
+    return nullptr;
 }
 
 int KItemListAccessibleCell::childCount() const
@@ -434,7 +434,7 @@ int KItemListAccessibleCell::index() const
 
 QObject* KItemListAccessibleCell::object() const
 {
-    return 0;
+    return nullptr;
 }
 
 // Container Interface
@@ -465,7 +465,7 @@ QAccessibleInterface* KItemListContainerAccessible::child(int index) const
     if (index == 0) {
         return QAccessible::queryAccessibleInterface(container()->controller()->view());
     }
-    return Q_NULLPTR;
+    return nullptr;
 }
 
 const KItemListContainer* KItemListContainerAccessible::container() const
diff --git a/src/kitemviews/kitemlistwidget.cpp b/src/kitemviews/kitemlistwidget.cpp
index 65fc911bd..579d8b7a2 100644
--- a/src/kitemviews/kitemlistwidget.cpp
+++ b/src/kitemviews/kitemlistwidget.cpp
@@ -42,7 +42,7 @@ KItemListWidgetInformant::~KItemListWidgetInformant()
 }
 
 KItemListWidget::KItemListWidget(KItemListWidgetInformant* informant, QGraphicsItem* parent) :
-    QGraphicsWidget(parent, 0),
+    QGraphicsWidget(parent, nullptr),
     m_informant(informant),
     m_index(-1),
     m_selected(false),
@@ -56,9 +56,9 @@ KItemListWidget::KItemListWidget(KItemListWidgetInformant* informant, QGraphicsI
     m_styleOption(),
     m_siblingsInfo(),
     m_hoverOpacity(0),
-    m_hoverCache(0),
-    m_hoverAnimation(0),
-    m_selectionToggle(0),
+    m_hoverCache(nullptr),
+    m_hoverAnimation(nullptr),
+    m_selectionToggle(nullptr),
     m_editedRole()
 {
 }
@@ -72,7 +72,7 @@ void KItemListWidget::setIndex(int index)
 {
     if (m_index != index) {
         delete m_selectionToggle;
-        m_selectionToggle = 0;
+        m_selectionToggle = nullptr;
 
         if (m_hoverAnimation) {
             m_hoverAnimation->stop();
@@ -474,7 +474,7 @@ void KItemListWidget::slotHoverAnimationFinished()
 {
     if (!m_hovered && m_selectionToggle) {
         m_selectionToggle->deleteLater();
-        m_selectionToggle = 0;
+        m_selectionToggle = nullptr;
     }
 }
 
@@ -502,7 +502,7 @@ void KItemListWidget::setHoverOpacity(qreal opacity)
 
     if (m_hoverOpacity <= 0.0) {
         delete m_hoverCache;
-        m_hoverCache = 0;
+        m_hoverCache = nullptr;
     }
 
     update();
@@ -511,7 +511,7 @@ void KItemListWidget::setHoverOpacity(qreal opacity)
 void KItemListWidget::clearHoverCache()
 {
     delete m_hoverCache;
-    m_hoverCache = 0;
+    m_hoverCache = nullptr;
 }
 
 void KItemListWidget::drawItemStyleOption(QPainter* painter, QWidget* widget, QStyle::State styleState)
diff --git a/src/kitemviews/kitemlistwidget.h b/src/kitemviews/kitemlistwidget.h
index 1480c1acb..06fea0e39 100644
--- a/src/kitemviews/kitemlistwidget.h
+++ b/src/kitemviews/kitemlistwidget.h
@@ -82,7 +82,7 @@ public:
      * to show the data of the custom model provided by KItemListWidget::data().
      * @reimp
      */
-    void paint(QPainter* painter, const QStyleOptionGraphicsItem* option, QWidget* widget = 0) override;
+    void paint(QPainter* painter, const QStyleOptionGraphicsItem* option, QWidget* widget = nullptr) override;
 
     void setVisibleRoles(const QList<QByteArray>& roles);
     QList<QByteArray> visibleRoles() const;
@@ -186,7 +186,7 @@ public:
      * @return Pixmap that is used when dragging an item. Per default the current state of the
      *         widget is returned as pixmap.
      */
-    virtual QPixmap createDragPixmap(const QStyleOptionGraphicsItem* option, QWidget* widget = 0);
+    virtual QPixmap createDragPixmap(const QStyleOptionGraphicsItem* option, QWidget* widget = nullptr);
 
 signals:
     void roleEditingCanceled(int index, const QByteArray& role, const QVariant& value);
diff --git a/src/kitemviews/kitemmodelbase.cpp b/src/kitemviews/kitemmodelbase.cpp
index d73468336..983b46960 100644
--- a/src/kitemviews/kitemmodelbase.cpp
+++ b/src/kitemviews/kitemmodelbase.cpp
@@ -126,7 +126,7 @@ int KItemModelBase::expandedParentsCount(int index) const
 QMimeData* KItemModelBase::createMimeData(const KItemSet& indexes) const
 {
     Q_UNUSED(indexes);
-    return 0;
+    return nullptr;
 }
 
 int KItemModelBase::indexForKeyboardSearch(const QString& text, int startFromIndex) const
diff --git a/src/kitemviews/kitemmodelbase.h b/src/kitemviews/kitemmodelbase.h
index d604f423f..0aa6d187f 100644
--- a/src/kitemviews/kitemmodelbase.h
+++ b/src/kitemviews/kitemmodelbase.h
@@ -55,8 +55,8 @@ class DOLPHIN_EXPORT KItemModelBase : public QObject
     Q_OBJECT
 
 public:
-    KItemModelBase(QObject* parent = 0);
-    explicit KItemModelBase(const QByteArray& sortRole, QObject* parent = 0);
+    KItemModelBase(QObject* parent = nullptr);
+    explicit KItemModelBase(const QByteArray& sortRole, QObject* parent = nullptr);
     ~KItemModelBase() override;
 
     /** @return The number of items. */
diff --git a/src/kitemviews/kstandarditem.cpp b/src/kitemviews/kstandarditem.cpp
index f3fd258f9..d4d1fa2f9 100644
--- a/src/kitemviews/kstandarditem.cpp
+++ b/src/kitemviews/kstandarditem.cpp
@@ -25,7 +25,7 @@
 KStandardItem::KStandardItem(KStandardItem* parent) :
     m_parent(parent),
     m_children(),
-    m_model(0),
+    m_model(nullptr),
     m_data()
 {
 }
@@ -33,7 +33,7 @@ KStandardItem::KStandardItem(KStandardItem* parent) :
 KStandardItem::KStandardItem(const QString& text, KStandardItem* parent) :
     m_parent(parent),
     m_children(),
-    m_model(0),
+    m_model(nullptr),
     m_data()
 {
     setText(text);
@@ -42,7 +42,7 @@ KStandardItem::KStandardItem(const QString& text, KStandardItem* parent) :
 KStandardItem::KStandardItem(const QString& icon, const QString& text, KStandardItem* parent) :
     m_parent(parent),
     m_children(),
-    m_model(0),
+    m_model(nullptr),
     m_data()
 {
     setIcon(icon);
diff --git a/src/kitemviews/kstandarditem.h b/src/kitemviews/kstandarditem.h
index 5bb2bb36f..fec197c06 100644
--- a/src/kitemviews/kstandarditem.h
+++ b/src/kitemviews/kstandarditem.h
@@ -40,9 +40,9 @@ class DOLPHIN_EXPORT KStandardItem
 {
 
 public:
-    explicit KStandardItem(KStandardItem* parent = 0);
-    explicit KStandardItem(const QString& text, KStandardItem* parent = 0);
-    KStandardItem(const QString& icon, const QString& text, KStandardItem* parent = 0);
+    explicit KStandardItem(KStandardItem* parent = nullptr);
+    explicit KStandardItem(const QString& text, KStandardItem* parent = nullptr);
+    KStandardItem(const QString& icon, const QString& text, KStandardItem* parent = nullptr);
     KStandardItem(const KStandardItem& item);
     virtual ~KStandardItem();
 
diff --git a/src/kitemviews/kstandarditemlistgroupheader.h b/src/kitemviews/kstandarditemlistgroupheader.h
index 1d9989cdf..36ab77722 100644
--- a/src/kitemviews/kstandarditemlistgroupheader.h
+++ b/src/kitemviews/kstandarditemlistgroupheader.h
@@ -32,10 +32,10 @@ class DOLPHIN_EXPORT KStandardItemListGroupHeader : public KItemListGroupHeader
     Q_OBJECT
 
 public:
-    KStandardItemListGroupHeader(QGraphicsWidget* parent = 0);
+    KStandardItemListGroupHeader(QGraphicsWidget* parent = nullptr);
     ~KStandardItemListGroupHeader() override;
 
-    void paint(QPainter* painter, const QStyleOptionGraphicsItem* option, QWidget* widget = 0) override;
+    void paint(QPainter* painter, const QStyleOptionGraphicsItem* option, QWidget* widget = nullptr) override;
 
 protected:
     void paintRole(QPainter* painter, const QRectF& roleBounds, const QColor& color) override;
diff --git a/src/kitemviews/kstandarditemlistview.h b/src/kitemviews/kstandarditemlistview.h
index d22a51b34..6321a1d2e 100644
--- a/src/kitemviews/kstandarditemlistview.h
+++ b/src/kitemviews/kstandarditemlistview.h
@@ -52,7 +52,7 @@ public:
         DetailsLayout
     };
 
-    KStandardItemListView(QGraphicsWidget* parent = 0);
+    KStandardItemListView(QGraphicsWidget* parent = nullptr);
     ~KStandardItemListView() override;
 
     void setItemLayout(ItemLayout layout);
diff --git a/src/kitemviews/kstandarditemlistwidget.cpp b/src/kitemviews/kstandarditemlistwidget.cpp
index 7d94a59f5..d9e175987 100644
--- a/src/kitemviews/kstandarditemlistwidget.cpp
+++ b/src/kitemviews/kstandarditemlistwidget.cpp
@@ -273,8 +273,8 @@ KStandardItemListWidget::KStandardItemListWidget(KItemListWidgetInformant* infor
     m_additionalInfoTextColor(),
     m_overlay(),
     m_rating(),
-    m_roleEditor(0),
-    m_oldRoleEditor(0)
+    m_roleEditor(nullptr),
+    m_oldRoleEditor(nullptr)
 {
 }
 
@@ -770,7 +770,7 @@ void KStandardItemListWidget::editedRoleChanged(const QByteArray& current, const
             }
             m_oldRoleEditor = m_roleEditor;
             m_roleEditor->hide();
-            m_roleEditor = 0;
+            m_roleEditor = nullptr;
         }
         return;
     }
@@ -1452,7 +1452,7 @@ void KStandardItemListWidget::closeRoleEditor()
     }
     m_oldRoleEditor = m_roleEditor;
     m_roleEditor->hide();
-    m_roleEditor = 0;
+    m_roleEditor = nullptr;
 }
 
 QPixmap KStandardItemListWidget::pixmapForIcon(const QString& name, const QStringList& overlays, int size, QIcon::Mode mode)
diff --git a/src/kitemviews/kstandarditemlistwidget.h b/src/kitemviews/kstandarditemlistwidget.h
index bd4b52923..b13c303bc 100644
--- a/src/kitemviews/kstandarditemlistwidget.h
+++ b/src/kitemviews/kstandarditemlistwidget.h
@@ -104,7 +104,7 @@ public:
     void setSupportsItemExpanding(bool supportsItemExpanding);
     bool supportsItemExpanding() const;
 
-    void paint(QPainter* painter, const QStyleOptionGraphicsItem* option, QWidget* widget = 0) override;
+    void paint(QPainter* painter, const QStyleOptionGraphicsItem* option, QWidget* widget = nullptr) override;
 
     QRectF iconRect() const override;
     QRectF textRect() const override;
@@ -112,7 +112,7 @@ public:
     QRectF selectionRect() const override;
     QRectF expansionToggleRect() const override;
     QRectF selectionToggleRect() const override;
-    QPixmap createDragPixmap(const QStyleOptionGraphicsItem* option, QWidget* widget = 0) override;
+    QPixmap createDragPixmap(const QStyleOptionGraphicsItem* option, QWidget* widget = nullptr) override;
 
     static KItemListWidgetInformant* createInformant();
 
diff --git a/src/kitemviews/kstandarditemmodel.cpp b/src/kitemviews/kstandarditemmodel.cpp
index 25288e50f..0779614c3 100644
--- a/src/kitemviews/kstandarditemmodel.cpp
+++ b/src/kitemviews/kstandarditemmodel.cpp
@@ -89,7 +89,7 @@ void KStandardItemModel::changeItem(int index, KStandardItem* item)
 
     m_indexesForItems.remove(oldItem);
     delete oldItem;
-    oldItem = 0;
+    oldItem = nullptr;
 
     m_items[index] = item;
     m_indexesForItems.insert(item, index);
@@ -114,7 +114,7 @@ void KStandardItemModel::removeItem(int index)
         onItemRemoved(index, item);
 
         delete item;
-        item = 0;
+        item = nullptr;
 
         emit itemsRemoved(KItemRangeList() << KItemRange(index, 1));
 
@@ -134,7 +134,7 @@ void KStandardItemModel::clear()
 KStandardItem* KStandardItemModel::item(int index) const
 {
     if (index < 0 || index >= m_items.count()) {
-        return 0;
+        return nullptr;
     }
     return m_items[index];
 }
@@ -178,7 +178,7 @@ bool KStandardItemModel::setData(int index, const QHash<QByteArray, QVariant>& v
 QMimeData* KStandardItemModel::createMimeData(const KItemSet& indexes) const
 {
     Q_UNUSED(indexes);
-    return 0;
+    return nullptr;
 }
 
 int KStandardItemModel::indexForKeyboardSearch(const QString& text, int startFromIndex) const
diff --git a/src/kitemviews/kstandarditemmodel.h b/src/kitemviews/kstandarditemmodel.h
index 6e63daa81..288b5b84f 100644
--- a/src/kitemviews/kstandarditemmodel.h
+++ b/src/kitemviews/kstandarditemmodel.h
@@ -40,7 +40,7 @@ class DOLPHIN_EXPORT KStandardItemModel : public KItemModelBase
     Q_OBJECT
 
 public:
-    explicit KStandardItemModel(QObject* parent = 0);
+    explicit KStandardItemModel(QObject* parent = nullptr);
     ~KStandardItemModel() override;
 
     /**
diff --git a/src/kitemviews/private/kdirectorycontentscounter.cpp b/src/kitemviews/private/kdirectorycontentscounter.cpp
index af7312ad2..90716173c 100644
--- a/src/kitemviews/private/kdirectorycontentscounter.cpp
+++ b/src/kitemviews/private/kdirectorycontentscounter.cpp
@@ -30,9 +30,9 @@ KDirectoryContentsCounter::KDirectoryContentsCounter(KFileItemModel* model, QObj
     QObject(parent),
     m_model(model),
     m_queue(),
-    m_worker(0),
+    m_worker(nullptr),
     m_workerIsBusy(false),
-    m_dirWatcher(0),
+    m_dirWatcher(nullptr),
     m_watchedDirs()
 {
     connect(m_model, &KFileItemModel::itemsRemoved,
@@ -70,7 +70,7 @@ KDirectoryContentsCounter::~KDirectoryContentsCounter()
         m_workerThread->quit();
         m_workerThread->wait();
         delete m_workerThread;
-        m_workerThread = 0;
+        m_workerThread = nullptr;
 
         // The worker thread has finished running now, so it's safe to delete
         // m_worker. deleteLater() would not work at all because the event loop
@@ -180,5 +180,5 @@ void KDirectoryContentsCounter::startWorker(const QString& path)
     }
 }
 
-QThread* KDirectoryContentsCounter::m_workerThread = 0;
+QThread* KDirectoryContentsCounter::m_workerThread = nullptr;
 int KDirectoryContentsCounter::m_workersCount = 0;
diff --git a/src/kitemviews/private/kdirectorycontentscounter.h b/src/kitemviews/private/kdirectorycontentscounter.h
index 13726fae7..977765ab7 100644
--- a/src/kitemviews/private/kdirectorycontentscounter.h
+++ b/src/kitemviews/private/kdirectorycontentscounter.h
@@ -35,7 +35,7 @@ class KDirectoryContentsCounter : public QObject
     Q_OBJECT
 
 public:
-    explicit KDirectoryContentsCounter(KFileItemModel* model, QObject* parent = 0);
+    explicit KDirectoryContentsCounter(KFileItemModel* model, QObject* parent = nullptr);
     ~KDirectoryContentsCounter() override;
 
     /**
diff --git a/src/kitemviews/private/kdirectorycontentscounterworker.cpp b/src/kitemviews/private/kdirectorycontentscounterworker.cpp
index 47fbb5dd5..79e134724 100644
--- a/src/kitemviews/private/kdirectorycontentscounterworker.cpp
+++ b/src/kitemviews/private/kdirectorycontentscounterworker.cpp
@@ -59,7 +59,7 @@ int KDirectoryContentsCounterWorker::subItemsCount(const QString& path, Options
     DIR* dir = ::opendir(QFile::encodeName(path));
     if (dir) {  // krazy:exclude=syscalls
         count = 0;
-        struct dirent *dirEntry = 0;
+        struct dirent *dirEntry = nullptr;
         while ((dirEntry = ::readdir(dir))) {
             if (dirEntry->d_name[0] == '.') {
                 if (dirEntry->d_name[1] == '\0' || !countHiddenFiles) {
diff --git a/src/kitemviews/private/kdirectorycontentscounterworker.h b/src/kitemviews/private/kdirectorycontentscounterworker.h
index b2e31ef0f..2460a0e1f 100644
--- a/src/kitemviews/private/kdirectorycontentscounterworker.h
+++ b/src/kitemviews/private/kdirectorycontentscounterworker.h
@@ -37,7 +37,7 @@ public:
     };
     Q_DECLARE_FLAGS(Options, Option)
 
-    explicit KDirectoryContentsCounterWorker(QObject* parent = 0);
+    explicit KDirectoryContentsCounterWorker(QObject* parent = nullptr);
 
     /**
      * Counts the items inside the directory \a path using the options
diff --git a/src/kitemviews/private/kfileitemclipboard.cpp b/src/kitemviews/private/kfileitemclipboard.cpp
index d27869dff..31e6c6198 100644
--- a/src/kitemviews/private/kfileitemclipboard.cpp
+++ b/src/kitemviews/private/kfileitemclipboard.cpp
@@ -74,7 +74,7 @@ void KFileItemClipboard::updateCutItems()
 }
 
 KFileItemClipboard::KFileItemClipboard() :
-    QObject(0),
+    QObject(nullptr),
     m_cutItems()
 {
     updateCutItems();
diff --git a/src/kitemviews/private/kfileitemmodeldirlister.cpp b/src/kitemviews/private/kfileitemmodeldirlister.cpp
index 778625573..eeeba11b2 100644
--- a/src/kitemviews/private/kfileitemmodeldirlister.cpp
+++ b/src/kitemviews/private/kfileitemmodeldirlister.cpp
@@ -24,7 +24,7 @@
 KFileItemModelDirLister::KFileItemModelDirLister(QObject* parent) :
     KDirLister(parent)
 {
-    setAutoErrorHandlingEnabled(false, 0);
+    setAutoErrorHandlingEnabled(false, nullptr);
 }
 
 KFileItemModelDirLister::~KFileItemModelDirLister()
diff --git a/src/kitemviews/private/kfileitemmodeldirlister.h b/src/kitemviews/private/kfileitemmodeldirlister.h
index ca5f76de6..c8b670f71 100644
--- a/src/kitemviews/private/kfileitemmodeldirlister.h
+++ b/src/kitemviews/private/kfileitemmodeldirlister.h
@@ -34,7 +34,7 @@ class DOLPHIN_EXPORT KFileItemModelDirLister : public KDirLister
     Q_OBJECT
 
 public:
-    KFileItemModelDirLister(QObject* parent = 0);
+    KFileItemModelDirLister(QObject* parent = nullptr);
     ~KFileItemModelDirLister() override;
 
 signals:
diff --git a/src/kitemviews/private/kfileitemmodelfilter.cpp b/src/kitemviews/private/kfileitemmodelfilter.cpp
index 6c6f94ffa..a388a242c 100644
--- a/src/kitemviews/private/kfileitemmodelfilter.cpp
+++ b/src/kitemviews/private/kfileitemmodelfilter.cpp
@@ -26,7 +26,7 @@
 
 KFileItemModelFilter::KFileItemModelFilter() :
     m_useRegExp(false),
-    m_regExp(0),
+    m_regExp(nullptr),
     m_lowerCasePattern(),
     m_pattern()
 {
@@ -35,7 +35,7 @@ KFileItemModelFilter::KFileItemModelFilter() :
 KFileItemModelFilter::~KFileItemModelFilter()
 {
     delete m_regExp;
-    m_regExp = 0;
+    m_regExp = nullptr;
 }
 
 void KFileItemModelFilter::setPattern(const QString& filter)
diff --git a/src/kitemviews/private/kitemlistheaderwidget.cpp b/src/kitemviews/private/kitemlistheaderwidget.cpp
index cc11e19da..4092ec523 100644
--- a/src/kitemviews/private/kitemlistheaderwidget.cpp
+++ b/src/kitemviews/private/kitemlistheaderwidget.cpp
@@ -30,7 +30,7 @@
 KItemListHeaderWidget::KItemListHeaderWidget(QGraphicsWidget* parent) :
     QGraphicsWidget(parent),
     m_automaticColumnResizing(true),
-    m_model(0),
+    m_model(nullptr),
     m_offset(0),
     m_columns(),
     m_columnWidths(),
diff --git a/src/kitemviews/private/kitemlistheaderwidget.h b/src/kitemviews/private/kitemlistheaderwidget.h
index 8248fb7bb..6d0974f97 100644
--- a/src/kitemviews/private/kitemlistheaderwidget.h
+++ b/src/kitemviews/private/kitemlistheaderwidget.h
@@ -38,7 +38,7 @@ class DOLPHIN_EXPORT KItemListHeaderWidget : public QGraphicsWidget
     Q_OBJECT
 
 public:
-    KItemListHeaderWidget(QGraphicsWidget* parent = 0);
+    KItemListHeaderWidget(QGraphicsWidget* parent = nullptr);
     ~KItemListHeaderWidget() override;
 
     void setModel(KItemModelBase* model);
@@ -64,7 +64,7 @@ public:
 
     qreal minimumColumnWidth() const;
 
-    void paint(QPainter* painter, const QStyleOptionGraphicsItem* option, QWidget* widget = 0) override;
+    void paint(QPainter* painter, const QStyleOptionGraphicsItem* option, QWidget* widget = nullptr) override;
 
 signals:
     /**
@@ -121,7 +121,7 @@ private:
                    const QByteArray& role,
                    const QRectF& rect,
                    int orderIndex,
-                   QWidget* widget = 0) const;
+                   QWidget* widget = nullptr) const;
 
     void updatePressedRoleIndex(const QPointF& pos);
     void updateHoveredRoleIndex(const QPointF& pos);
diff --git a/src/kitemviews/private/kitemlistkeyboardsearchmanager.h b/src/kitemviews/private/kitemlistkeyboardsearchmanager.h
index be1d96c74..02dedefca 100644
--- a/src/kitemviews/private/kitemlistkeyboardsearchmanager.h
+++ b/src/kitemviews/private/kitemlistkeyboardsearchmanager.h
@@ -41,7 +41,7 @@ class DOLPHIN_EXPORT KItemListKeyboardSearchManager : public QObject
 
 public:
 
-    KItemListKeyboardSearchManager(QObject* parent = 0);
+    KItemListKeyboardSearchManager(QObject* parent = nullptr);
     ~KItemListKeyboardSearchManager() override;
 
     /**
diff --git a/src/kitemviews/private/kitemlistrubberband.h b/src/kitemviews/private/kitemlistrubberband.h
index fa7401c9e..eaef59173 100644
--- a/src/kitemviews/private/kitemlistrubberband.h
+++ b/src/kitemviews/private/kitemlistrubberband.h
@@ -32,7 +32,7 @@ class DOLPHIN_EXPORT KItemListRubberBand : public QObject
     Q_OBJECT
 
 public:
-    explicit KItemListRubberBand(QObject* parent = 0);
+    explicit KItemListRubberBand(QObject* parent = nullptr);
     ~KItemListRubberBand() override;
 
     void setStartPosition(const QPointF& pos);
diff --git a/src/kitemviews/private/kitemlistselectiontoggle.cpp b/src/kitemviews/private/kitemlistselectiontoggle.cpp
index 9031c870f..25f97ee02 100644
--- a/src/kitemviews/private/kitemlistselectiontoggle.cpp
+++ b/src/kitemviews/private/kitemlistselectiontoggle.cpp
@@ -24,7 +24,7 @@
 
 
 KItemListSelectionToggle::KItemListSelectionToggle(QGraphicsItem* parent) :
-    QGraphicsWidget(parent, 0),
+    QGraphicsWidget(parent, nullptr),
     m_checked(false),
     m_hovered(false)
 {
diff --git a/src/kitemviews/private/kitemlistselectiontoggle.h b/src/kitemviews/private/kitemlistselectiontoggle.h
index 7c283fb54..a10995372 100644
--- a/src/kitemviews/private/kitemlistselectiontoggle.h
+++ b/src/kitemviews/private/kitemlistselectiontoggle.h
@@ -42,7 +42,7 @@ public:
 
     void setHovered(bool hovered);
 
-    void paint(QPainter* painter, const QStyleOptionGraphicsItem* option, QWidget* widget = 0) override;
+    void paint(QPainter* painter, const QStyleOptionGraphicsItem* option, QWidget* widget = nullptr) override;
 
 protected:
     void resizeEvent(QGraphicsSceneResizeEvent* event) override;
diff --git a/src/kitemviews/private/kitemlistsmoothscroller.cpp b/src/kitemviews/private/kitemlistsmoothscroller.cpp
index 6bfdba4c9..17eac3b39 100644
--- a/src/kitemviews/private/kitemlistsmoothscroller.cpp
+++ b/src/kitemviews/private/kitemlistsmoothscroller.cpp
@@ -32,7 +32,7 @@ KItemListSmoothScroller::KItemListSmoothScroller(QScrollBar* scrollBar,
     m_scrollBarPressed(false),
     m_smoothScrolling(true),
     m_scrollBar(scrollBar),
-    m_animation(0)
+    m_animation(nullptr)
 {
     m_animation = new QPropertyAnimation(this);
     const int duration = m_scrollBar->style()->styleHint(QStyle::SH_Widget_Animate, nullptr, m_scrollBar) ? 100 : 1;
diff --git a/src/kitemviews/private/kitemlistsmoothscroller.h b/src/kitemviews/private/kitemlistsmoothscroller.h
index 6dccde9a2..a5aca82e6 100644
--- a/src/kitemviews/private/kitemlistsmoothscroller.h
+++ b/src/kitemviews/private/kitemlistsmoothscroller.h
@@ -39,7 +39,7 @@ class DOLPHIN_EXPORT KItemListSmoothScroller : public QObject
 
 public:
     explicit KItemListSmoothScroller(QScrollBar* scrollBar,
-                                     QObject* parent = 0);
+                                     QObject* parent = nullptr);
     ~KItemListSmoothScroller() override;
 
     void setScrollBar(QScrollBar* scrollBar);
diff --git a/src/kitemviews/private/kitemlistviewanimation.cpp b/src/kitemviews/private/kitemlistviewanimation.cpp
index 67ad192c6..89b345210 100644
--- a/src/kitemviews/private/kitemlistviewanimation.cpp
+++ b/src/kitemviews/private/kitemlistviewanimation.cpp
@@ -116,7 +116,7 @@ void KItemListViewAnimation::start(QGraphicsWidget* widget, AnimationType type,
 {
     stop(widget, type);
 
-    QPropertyAnimation* propertyAnim = 0;
+    QPropertyAnimation* propertyAnim = nullptr;
     const int animationDuration = widget->style()->styleHint(QStyle::SH_Widget_Animate) ? 200 : 1;
 
     switch (type) {
diff --git a/src/kitemviews/private/kitemlistviewanimation.h b/src/kitemviews/private/kitemlistviewanimation.h
index ddcb5e964..ba3a33dc9 100644
--- a/src/kitemviews/private/kitemlistviewanimation.h
+++ b/src/kitemviews/private/kitemlistviewanimation.h
@@ -48,7 +48,7 @@ public:
         ResizeAnimation
     };
 
-    KItemListViewAnimation(QObject* parent = 0);
+    KItemListViewAnimation(QObject* parent = nullptr);
     ~KItemListViewAnimation() override;
 
     void setScrollOrientation(Qt::Orientation orientation);
diff --git a/src/kitemviews/private/kitemlistviewlayouter.cpp b/src/kitemviews/private/kitemlistviewlayouter.cpp
index d54457908..ca3942644 100644
--- a/src/kitemviews/private/kitemlistviewlayouter.cpp
+++ b/src/kitemviews/private/kitemlistviewlayouter.cpp
@@ -35,7 +35,7 @@ KItemListViewLayouter::KItemListViewLayouter(KItemListSizeHintResolver* sizeHint
     m_itemSize(128, 128),
     m_itemMargin(),
     m_headerHeight(0),
-    m_model(0),
+    m_model(nullptr),
     m_sizeHintResolver(sizeHintResolver),
     m_scrollOffset(0),
     m_maximumScrollOffset(0),
diff --git a/src/kitemviews/private/kitemlistviewlayouter.h b/src/kitemviews/private/kitemlistviewlayouter.h
index 84bbfff58..2116f8405 100644
--- a/src/kitemviews/private/kitemlistviewlayouter.h
+++ b/src/kitemviews/private/kitemlistviewlayouter.h
@@ -50,7 +50,7 @@ class DOLPHIN_EXPORT KItemListViewLayouter : public QObject
     Q_OBJECT
 
 public:
-    KItemListViewLayouter(KItemListSizeHintResolver* sizeHintResolver, QObject* parent = 0);
+    KItemListViewLayouter(KItemListSizeHintResolver* sizeHintResolver, QObject* parent = nullptr);
     ~KItemListViewLayouter() override;
 
     void setScrollOrientation(Qt::Orientation orientation);