Use Q_NULLPTR here too

alarmcalendar.h

@@ -69,7 +69,7 @@ class AlarmCalendar : public QObject
         KCalCore::Event::List kcalEvents(CalEvent::Type s = CalEvent::EMPTY);   // display calendar only
         bool                  eventReadOnly(Akonadi::Item::Id) const;
         Akonadi::Collection   collectionForEvent(Akonadi::Item::Id) const;
-        bool                  addEvent(KAEvent&, QWidget* promptParent = 0, bool useEventID = false, Akonadi::Collection* = 0, bool noPrompt = false, bool* cancelled = 0);
+        bool                  addEvent(KAEvent&, QWidget* promptparent = Q_NULLPTR, bool useEventID = false, Akonadi::Collection* = 0, bool noPrompt = false, bool* cancelled = 0);
         bool                  modifyEvent(const EventId& oldEventId, KAEvent& newEvent);
         KAEvent*              updateEvent(const KAEvent&);
         KAEvent*              updateEvent(const KAEvent*);

alarmlistdelegate.h

@@ -30,7 +30,7 @@ class AlarmListDelegate : public EventListDelegate
 {
         Q_OBJECT
     public:
-        explicit AlarmListDelegate(AlarmListView* parent = 0)
+        explicit AlarmListDelegate(AlarmListView* parent = Q_NULLPTR)
                    : EventListDelegate(parent) {}
         void paint(QPainter*, const QStyleOptionViewItem&, const QModelIndex&) const Q_DECL_OVERRIDE;
         QSize sizeHint(const QStyleOptionViewItem&, const QModelIndex&) const Q_DECL_OVERRIDE;

collectionmodel.h

@@ -252,7 +252,7 @@ class CollectionControlModel : public Akonadi::FavoriteCollectionsModel
          *  @param cancelled If non-null: set to true if the user cancelled
          *             the prompt dialogue; set to false if any other error.
          */
-        static Akonadi::Collection destination(CalEvent::Type, QWidget* promptParent = 0, bool noPrompt = false, bool* cancelled = 0);
+        static Akonadi::Collection destination(CalEvent::Type, QWidget* promptparent = Q_NULLPTR, bool noPrompt = false, bool* cancelled = 0);
 
         /** Return the enabled collections which contain a specified mime type.
          *  If 'writable' is true, only writable collections are included.

templatelistview.h

@@ -38,7 +38,7 @@ class TemplateListDelegate : public EventListDelegate
 {
         Q_OBJECT
     public:
-        explicit TemplateListDelegate(TemplateListView* parent = 0)
+        explicit TemplateListDelegate(TemplateListView* parent = Q_NULLPTR)
                    : EventListDelegate(parent) {}
         virtual void edit(KAEvent*, EventListView*);
 };