clang-tidy -fix: modernize-use-nullptr

src/dialogs/subtitleedit.h

@@ -34,7 +34,7 @@ class ShiftEnterFilter : public QObject
 {
     Q_OBJECT
 public:
-    ShiftEnterFilter(QObject *parent = 0);
+    ShiftEnterFilter(QObject *parent = nullptr);
 protected:
     bool eventFilter(QObject *obj, QEvent *event) override;
 signals:

src/effects/effectlist/model/effecttreemodel.cpp

@@ -241,7 +241,7 @@ void EffectTreeModel::editCustomAsset(const QString newName,const QString newDes
 
         if (dir.exists(newName + QStringLiteral(".xml"))){
             QMessageBox message;
-            message.critical(0, i18n("Error"), i18n("Effect name %1 already exists.\n Try another name?", newName));
+            message.critical(nullptr, i18n("Error"), i18n("Effect name %1 already exists.\n Try another name?", newName));
             message.setFixedSize(400, 200);
             return;
         }

src/mltconnection.cpp

@@ -28,7 +28,7 @@ static void mlt_log_handler(void *service, int mlt_level, const char *format, va
     if (mlt_level > mlt_log_get_level())
         return;
     QString message;
-    mlt_properties properties = service? MLT_SERVICE_PROPERTIES((mlt_service) service) : NULL;
+    mlt_properties properties = service? MLT_SERVICE_PROPERTIES((mlt_service) service) : nullptr;
     if (properties) {
         char *mlt_type = mlt_properties_get(properties, "mlt_type");
         char *service_name = mlt_properties_get(properties, "mlt_service");

src/monitor/glwidget.cpp

@@ -130,7 +130,7 @@ GLWidget::GLWidget(int id, QObject *parent)
     m_blackClip->set("out", 3);
     connect(&m_refreshTimer, &QTimer::timeout, this, &GLWidget::refresh);
     m_producer = m_blackClip;
-    rootContext()->setContextProperty("markersModel", 0);
+    rootContext()->setContextProperty("markersModel", nullptr);
     if (!initGPUAccel()) {
         disableGPUAccel();
     }
@@ -906,7 +906,7 @@ int GLWidget::setProducer(const std::shared_ptr<Mlt::Producer> &producer, bool i
         }
         m_producer = m_blackClip;
         // Reset markersModel
-        rootContext()->setContextProperty("markersModel", 0);
+        rootContext()->setContextProperty("markersModel", nullptr);
     }
     // redundant check. postcondition of above is m_producer != null
     m_producer->set_speed(0);

src/timeline2/model/timelinemodel.cpp

@@ -3561,7 +3561,7 @@ void TimelineModel::registerTrack(std::shared_ptr<TrackModel> track, int pos, bo
     m_iteratorTable[id] = it;
     endInsertRows();
     int cache = (int)QThread::idealThreadCount() + ((int)m_allTracks.size() + 1) * 2;
-    mlt_service_cache_set_size(NULL, "producer_avformat", qMax(4, cache));
+    mlt_service_cache_set_size(nullptr, "producer_avformat", qMax(4, cache));
 }
 
 void TimelineModel::registerClip(const std::shared_ptr<ClipModel> &clip, bool registerProducer)
@@ -3624,7 +3624,7 @@ Fun TimelineModel::deregisterTrack_lambda(int id)
         // Finish operation
         endRemoveRows();
         int cache = (int)QThread::idealThreadCount() + ((int)m_allTracks.size() + 1) * 2;
-        mlt_service_cache_set_size(NULL, "producer_avformat", qMax(4, cache));
+        mlt_service_cache_set_size(nullptr, "producer_avformat", qMax(4, cache));
         return true;
     };
 }