Fix zero as null pointer constant

Change-Id: If41bd31f1fcec5647197ca6834909f4011fe87fa
Reviewed-by: Mitch Curtis <mitch.curtis@qt.io>

46 files changed, 125 insertions, 125 deletions

diff --git a/src/plugins/hangul/hangulinputmethod_p.h b/src/plugins/hangul/hangulinputmethod_p.h
index ba0458eb..cdbd0841 100644
--- a/src/plugins/hangul/hangulinputmethod_p.h
+++ b/src/plugins/hangul/hangulinputmethod_p.h
@@ -53,7 +53,7 @@ class HangulInputMethod : public AbstractInputMethod
     Q_OBJECT
     Q_DECLARE_PRIVATE(HangulInputMethod)
 public:
-    explicit HangulInputMethod(QObject *parent = 0);
+    explicit HangulInputMethod(QObject *parent = nullptr);
     ~HangulInputMethod();
 
     QList<InputEngine::InputMode> inputModes(const QString &locale);
diff --git a/src/plugins/hunspell/hunspellinputmethod/hunspellinputmethod_p.h b/src/plugins/hunspell/hunspellinputmethod/hunspellinputmethod_p.h
index 26cf8452..68a4e702 100644
--- a/src/plugins/hunspell/hunspellinputmethod/hunspellinputmethod_p.h
+++ b/src/plugins/hunspell/hunspellinputmethod/hunspellinputmethod_p.h
@@ -55,7 +55,7 @@ class HunspellInputMethod : public AbstractInputMethod
 protected:
     HunspellInputMethod(HunspellInputMethodPrivate *d_ptr, QObject *parent);
 public:
-    explicit HunspellInputMethod(QObject *parent = 0);
+    explicit HunspellInputMethod(QObject *parent = nullptr);
     ~HunspellInputMethod();
 
     QList<InputEngine::InputMode> inputModes(const QString &locale);
diff --git a/src/plugins/hunspell/hunspellinputmethod/hunspellworker.cpp b/src/plugins/hunspell/hunspellinputmethod/hunspellworker.cpp
index 292d3ae1..46cbf49c 100644
--- a/src/plugins/hunspell/hunspellinputmethod/hunspellworker.cpp
+++ b/src/plugins/hunspell/hunspellinputmethod/hunspellworker.cpp
@@ -57,7 +57,7 @@ Q_DECLARE_LOGGING_CATEGORY(lcHunspell)
 
 HunspellLoadDictionaryTask::HunspellLoadDictionaryTask(const QString &locale, const QStringList &searchPaths) :
     HunspellTask(),
-    hunspellPtr(0),
+    hunspellPtr(nullptr),
     locale(locale),
     searchPaths(searchPaths)
 {
@@ -65,7 +65,7 @@ HunspellLoadDictionaryTask::HunspellLoadDictionaryTask(const QString &locale, co
 
 void HunspellLoadDictionaryTask::run()
 {
-    Q_ASSERT(hunspellPtr != 0);
+    Q_ASSERT(hunspellPtr != nullptr);
 
     qCDebug(lcHunspell) << "HunspellLoadDictionaryTask::run(): locale:" << locale;
 
@@ -74,7 +74,7 @@ void HunspellLoadDictionaryTask::run()
 
     if (*hunspellPtr) {
         Hunspell_destroy(*hunspellPtr);
-        *hunspellPtr = 0;
+        *hunspellPtr = nullptr;
     }
 
     QString affPath;
@@ -99,7 +99,7 @@ void HunspellLoadDictionaryTask::run()
             if (!QTextCodec::codecForName(Hunspell_get_dic_encoding(*hunspellPtr))) {
                 qCWarning(lcHunspell) << "The Hunspell dictionary" << dicPath << "cannot be used because it uses an unknown text codec" << QString(Hunspell_get_dic_encoding(*hunspellPtr));
                 Hunspell_destroy(*hunspellPtr);
-                *hunspellPtr = 0;
+                *hunspellPtr = nullptr;
             }
         }
 
@@ -108,7 +108,7 @@ void HunspellLoadDictionaryTask::run()
         qCWarning(lcHunspell) << "Hunspell dictionary is missing for" << locale << ". Search paths" << searchPaths;
     }
 
-    emit completed(*hunspellPtr != 0);
+    emit completed(*hunspellPtr != nullptr);
 }
 
 /*!
@@ -132,7 +132,7 @@ void HunspellBuildSuggestionsTask::run()
     if (!textCodec)
         return;
 
-    char **slst = 0;
+    char **slst = nullptr;
     int n = Hunspell_suggest(hunspell, &slst, textCodec->fromUnicode(word).constData());
     if (n > 0) {
         /*  Collect word candidates from the Hunspell suggestions.
@@ -255,7 +255,7 @@ HunspellWorker::HunspellWorker(QObject *parent) :
     QThread(parent),
     taskSema(),
     taskLock(),
-    hunspell(0)
+    hunspell(nullptr)
 {
     abort = false;
 }
@@ -309,7 +309,7 @@ void HunspellWorker::run()
     }
     if (hunspell) {
         Hunspell_destroy(hunspell);
-        hunspell = 0;
+        hunspell = nullptr;
     }
 }
 
diff --git a/src/plugins/hunspell/hunspellinputmethod/hunspellworker_p.h b/src/plugins/hunspell/hunspellinputmethod/hunspellworker_p.h
index 7c3be1f6..1fe61bba 100644
--- a/src/plugins/hunspell/hunspellinputmethod/hunspellworker_p.h
+++ b/src/plugins/hunspell/hunspellinputmethod/hunspellworker_p.h
@@ -57,9 +57,9 @@ class HunspellTask : public QObject
 {
     Q_OBJECT
 public:
-    explicit HunspellTask(QObject *parent = 0) :
+    explicit HunspellTask(QObject *parent = nullptr) :
         QObject(parent),
-        hunspell(0)
+        hunspell(nullptr)
     {}
 
     virtual void run() = 0;
@@ -127,7 +127,7 @@ class HunspellWorker : public QThread
 {
     Q_OBJECT
 public:
-    explicit HunspellWorker(QObject *parent = 0);
+    explicit HunspellWorker(QObject *parent = nullptr);
     ~HunspellWorker();
 
     void addTask(QSharedPointer<HunspellTask> task);
diff --git a/src/plugins/lipi-toolkit/plugin/lipiinputmethod_p.h b/src/plugins/lipi-toolkit/plugin/lipiinputmethod_p.h
index 060b0f3d..177ff8ab 100644
--- a/src/plugins/lipi-toolkit/plugin/lipiinputmethod_p.h
+++ b/src/plugins/lipi-toolkit/plugin/lipiinputmethod_p.h
@@ -59,7 +59,7 @@ class LipiInputMethod : public LipiInputMethodBase
     Q_OBJECT
     Q_DECLARE_PRIVATE(LipiInputMethod)
 public:
-    explicit LipiInputMethod(QObject *parent = 0);
+    explicit LipiInputMethod(QObject *parent = nullptr);
     ~LipiInputMethod();
 
     QList<InputEngine::InputMode> inputModes(const QString &locale);
diff --git a/src/plugins/lipi-toolkit/plugin/lipisharedrecognizer.cpp b/src/plugins/lipi-toolkit/plugin/lipisharedrecognizer.cpp
index a204e051..8a45dcb6 100644
--- a/src/plugins/lipi-toolkit/plugin/lipisharedrecognizer.cpp
+++ b/src/plugins/lipi-toolkit/plugin/lipisharedrecognizer.cpp
@@ -54,12 +54,12 @@ Q_DECLARE_LOGGING_CATEGORY(lcLipi)
 int LipiSharedRecognizer::s_lipiEngineRefCount = 0;
 QString LipiSharedRecognizer::s_lipiRoot;
 QString LipiSharedRecognizer::s_lipiLib;
-void *LipiSharedRecognizer::s_lipiEngineHandle = 0;
-LipiSharedRecognizer::FN_PTR_CREATELTKLIPIENGINE LipiSharedRecognizer::s_createLTKLipiEngine = 0;
-LipiSharedRecognizer::FN_PTR_DELETELTKLIPIENGINE LipiSharedRecognizer::s_deleteLTKLipiEngine = 0;
-LTKLipiEngineInterface *LipiSharedRecognizer::s_lipiEngine = 0;
-LTKShapeRecognizer *LipiSharedRecognizer::s_shapeRecognizer = 0;
-LipiWorker *LipiSharedRecognizer::s_lipiWorker = 0;
+void *LipiSharedRecognizer::s_lipiEngineHandle = nullptr;
+LipiSharedRecognizer::FN_PTR_CREATELTKLIPIENGINE LipiSharedRecognizer::s_createLTKLipiEngine = nullptr;
+LipiSharedRecognizer::FN_PTR_DELETELTKLIPIENGINE LipiSharedRecognizer::s_deleteLTKLipiEngine = nullptr;
+LTKLipiEngineInterface *LipiSharedRecognizer::s_lipiEngine = nullptr;
+LTKShapeRecognizer *LipiSharedRecognizer::s_shapeRecognizer = nullptr;
+LipiWorker *LipiSharedRecognizer::s_lipiWorker = nullptr;
 QMap<int, QChar> LipiSharedRecognizer::s_unicodeMap;
 QString LipiSharedRecognizer::s_activeModel;
 stringStringMap LipiSharedRecognizer::s_lipiEngineConfigEntries;
@@ -252,13 +252,13 @@ void LipiSharedRecognizer::unloadLipiInterface()
         unloadModelData();
         if (s_lipiEngine) {
             s_deleteLTKLipiEngine();
-            s_lipiEngine = 0;
+            s_lipiEngine = nullptr;
         }
-        s_createLTKLipiEngine = 0;
-        s_deleteLTKLipiEngine = 0;
+        s_createLTKLipiEngine = nullptr;
+        s_deleteLTKLipiEngine = nullptr;
         QScopedPointer<LTKOSUtil> osUtil(LTKOSUtilFactory::getInstance());
         osUtil->unloadSharedLib(s_lipiEngineHandle);
-        s_lipiEngineHandle = 0;
+        s_lipiEngineHandle = nullptr;
     }
 }
 
@@ -307,8 +307,8 @@ int LipiSharedRecognizer::loadModelData(const QString &logicalName)
 {
     qCDebug(lcLipi) << "LipiSharedRecognizer::loadModelData():" << logicalName;
 
-    Q_ASSERT(s_shapeRecognizer == 0);
-    Q_ASSERT(s_lipiWorker == 0);
+    Q_ASSERT(s_shapeRecognizer == nullptr);
+    Q_ASSERT(s_lipiWorker == nullptr);
 
     QTime perf;
     perf.start();
@@ -356,11 +356,11 @@ void LipiSharedRecognizer::unloadModelData()
 
     if (s_lipiWorker) {
         delete s_lipiWorker;
-        s_lipiWorker = 0;
+        s_lipiWorker = nullptr;
     }
 
     s_lipiEngine->deleteShapeRecognizer(s_shapeRecognizer);
-    s_shapeRecognizer = 0;
+    s_shapeRecognizer = nullptr;
     s_unicodeMap.clear();
     s_activeModel.clear();
 
diff --git a/src/plugins/lipi-toolkit/plugin/lipiworker_p.h b/src/plugins/lipi-toolkit/plugin/lipiworker_p.h
index e3073313..098e198b 100644
--- a/src/plugins/lipi-toolkit/plugin/lipiworker_p.h
+++ b/src/plugins/lipi-toolkit/plugin/lipiworker_p.h
@@ -65,9 +65,9 @@ class LipiTask : public QObject
 {
     Q_OBJECT
 public:
-    explicit LipiTask(QObject *parent = 0) :
+    explicit LipiTask(QObject *parent = nullptr) :
         QObject(parent),
-        shapeRecognizer(0)
+        shapeRecognizer(nullptr)
     {}
 
     virtual void run() = 0;
@@ -137,7 +137,7 @@ class LipiWorker : public QThread
 {
     Q_OBJECT
 public:
-    explicit LipiWorker(LTKShapeRecognizer *shapeRecognizer, QObject *parent = 0);
+    explicit LipiWorker(LTKShapeRecognizer *shapeRecognizer, QObject *parent = nullptr);
     ~LipiWorker();
 
     void addTask(QSharedPointer<LipiTask> task);
diff --git a/src/plugins/openwnn/plugin/openwnninputmethod.cpp b/src/plugins/openwnn/plugin/openwnninputmethod.cpp
index a038fa34..ce7496a7 100644
--- a/src/plugins/openwnn/plugin/openwnninputmethod.cpp
+++ b/src/plugins/openwnn/plugin/openwnninputmethod.cpp
@@ -67,10 +67,10 @@ public:
         q_ptr(q_ptr),
         inputMode(InputEngine::Latin),
         exactMatchMode(false),
-        converter(0),
+        converter(nullptr),
         converterJAJP(),
         activeConvertType(CONVERT_TYPE_NONE),
-        preConverter(0),
+        preConverter(nullptr),
         enableLearning(true),
         enablePrediction(true),
         enableConverter(true),
@@ -86,22 +86,22 @@ public:
         switch (mode) {
         case ENGINE_MODE_DIRECT:
             /* Full/Half-width number or Full-width alphabet */
-            converter = NULL;
+            converter = nullptr;
             preConverter.reset();
             break;
 
         case ENGINE_MODE_NO_LV2_CONV:
-            converter = NULL;
+            converter = nullptr;
             preConverter.reset(new Romkan());
             break;
 
         case ENGINE_MODE_FULL_KATAKANA:
-            converter = NULL;
+            converter = nullptr;
             preConverter.reset(new RomkanFullKatakana());
             break;
 
         case ENGINE_MODE_HALF_KATAKANA:
-            converter = NULL;
+            converter = nullptr;
             preConverter.reset(new RomkanHalfKatakana());
             break;
 
@@ -126,7 +126,7 @@ public:
 
     bool isEnableL2Converter()
     {
-        return converter != NULL && enableConverter;
+        return converter != nullptr && enableConverter;
     }
 
     void startConvert(ConvertType convertType)
@@ -447,7 +447,7 @@ public:
         }
         QString tmp = composingText.toString(layer, 0, cursor - 1);
 
-        if (converter != NULL) {
+        if (converter != nullptr) {
             if (learn) {
                 if (activeConvertType == CONVERT_TYPE_RENBUN) {
                     learnWord(0); /* select the top of the clauses */
@@ -665,7 +665,7 @@ bool OpenWnnInputMethod::keyEvent(Qt::Key key, const QString &text, Qt::Keyboard
     Q_UNUSED(modifiers)
     Q_D(OpenWnnInputMethod);
 
-    if (d->preConverter == NULL && !d->isEnableL2Converter())
+    if (d->preConverter == nullptr && !d->isEnableL2Converter())
         return false;
 
     switch (key) {
@@ -738,7 +738,7 @@ bool OpenWnnInputMethod::keyEvent(Qt::Key key, const QString &text, Qt::Keyboard
                 if (d->isEnableL2Converter()) {
                     d->commitConvertingText();
                     d->composingText.insertStrSegment(ComposingText::LAYER0, ComposingText::LAYER1, text.mid(i, 1));
-                    if (d->preConverter != NULL)
+                    if (d->preConverter != nullptr)
                         d->preConverter->convert(d->composingText);
                     if (i == last)
                         d->updateViewStatusForPrediction(true, true);
diff --git a/src/plugins/openwnn/plugin/openwnninputmethod_p.h b/src/plugins/openwnn/plugin/openwnninputmethod_p.h
index 1ecdf8fc..dd439c13 100644
--- a/src/plugins/openwnn/plugin/openwnninputmethod_p.h
+++ b/src/plugins/openwnn/plugin/openwnninputmethod_p.h
@@ -54,7 +54,7 @@ class OpenWnnInputMethod : public AbstractInputMethod
     Q_DECLARE_PRIVATE(OpenWnnInputMethod)
 
 public:
-    explicit OpenWnnInputMethod(QObject *parent = 0);
+    explicit OpenWnnInputMethod(QObject *parent = nullptr);
     ~OpenWnnInputMethod();
 
     QList<InputEngine::InputMode> inputModes(const QString &locale);
diff --git a/src/plugins/pinyin/plugin/pinyindecoderservice.cpp b/src/plugins/pinyin/plugin/pinyindecoderservice.cpp
index ef836dcb..e01f7e63 100644
--- a/src/plugins/pinyin/plugin/pinyindecoderservice.cpp
+++ b/src/plugins/pinyin/plugin/pinyindecoderservice.cpp
@@ -69,7 +69,7 @@ PinyinDecoderService *PinyinDecoderService::getInstance()
     if (!_instance)
         _instance.reset(new PinyinDecoderService());
     if (!_instance->init())
-        return 0;
+        return nullptr;
     return _instance.data();
 }
 
@@ -108,7 +108,7 @@ void PinyinDecoderService::setUserDictionary(bool enabled)
         QFileInfo usrDictInfo(usrDictPath + "/qtvirtualkeyboard/pinyin/usr_dict.dat");
         im_init_user_dictionary(usrDictInfo.absoluteFilePath().toUtf8().constData());
     } else {
-        im_init_user_dictionary(NULL);
+        im_init_user_dictionary(nullptr);
     }
 }
 
@@ -224,7 +224,7 @@ void PinyinDecoderService::flushCache()
 QList<QString> PinyinDecoderService::predictionList(const QString &history)
 {
     QList<QString> predictList;
-    char16 (*predictItems)[kMaxPredictSize + 1] = 0;
+    char16 (*predictItems)[kMaxPredictSize + 1] = nullptr;
     int predictNum = int(im_get_predicts(history.utf16(), predictItems));
     predictList.reserve(predictNum);
     for (int i = 0; i < predictNum; i++)
diff --git a/src/plugins/pinyin/plugin/pinyindecoderservice_p.h b/src/plugins/pinyin/plugin/pinyindecoderservice_p.h
index 5034c4c6..24e08721 100644
--- a/src/plugins/pinyin/plugin/pinyindecoderservice_p.h
+++ b/src/plugins/pinyin/plugin/pinyindecoderservice_p.h
@@ -50,7 +50,7 @@ class PinyinDecoderService : public QObject
 {
     Q_OBJECT
     Q_DISABLE_COPY(PinyinDecoderService)
-    explicit PinyinDecoderService(QObject *parent = 0);
+    explicit PinyinDecoderService(QObject *parent = nullptr);
 
 public:
     ~PinyinDecoderService();
diff --git a/src/plugins/pinyin/plugin/pinyininputmethod_p.h b/src/plugins/pinyin/plugin/pinyininputmethod_p.h
index f766c68e..668eac3b 100644
--- a/src/plugins/pinyin/plugin/pinyininputmethod_p.h
+++ b/src/plugins/pinyin/plugin/pinyininputmethod_p.h
@@ -54,7 +54,7 @@ class PinyinInputMethod : public AbstractInputMethod
     Q_DECLARE_PRIVATE(PinyinInputMethod)
 
 public:
-    explicit PinyinInputMethod(QObject *parent = 0);
+    explicit PinyinInputMethod(QObject *parent = nullptr);
     ~PinyinInputMethod();
 
     QList<InputEngine::InputMode> inputModes(const QString &locale);
diff --git a/src/plugins/t9write/plugin/t9writedictionary.cpp b/src/plugins/t9write/plugin/t9writedictionary.cpp
index 4d3f3419..5a17ae6d 100644
--- a/src/plugins/t9write/plugin/t9writedictionary.cpp
+++ b/src/plugins/t9write/plugin/t9writedictionary.cpp
@@ -41,9 +41,9 @@ T9WriteDictionary::T9WriteDictionary(DECUMA_SESSION *decumaSession,
     decumaSession(decumaSession),
     memFuncs(memFuncs),
     cjk(cjk),
-    sourceData(0),
+    sourceData(nullptr),
     sourceSize(0),
-    convertedData(0),
+    convertedData(nullptr),
     convertedSize(0)
 {
 }
@@ -53,7 +53,7 @@ T9WriteDictionary::~T9WriteDictionary()
     if (convertedData) {
         DECUMA_STATUS status = DECUMA_API(DestroyConvertedDictionary)(&convertedData, &memFuncs);
         Q_ASSERT(status == decumaNoError);
-        Q_ASSERT(convertedData == 0);
+        Q_ASSERT(convertedData == nullptr);
     }
 }
 
@@ -75,7 +75,7 @@ bool T9WriteDictionary::load(const QString &fileName)
         qCWarning(lcT9Write) << "Could not open dictionary file" << fileName;
     }
 
-    return sourceData != 0;
+    return sourceData != nullptr;
 }
 
 bool T9WriteDictionary::convert(const DECUMA_SRC_DICTIONARY_INFO &dictionaryInfo)
@@ -91,7 +91,7 @@ bool T9WriteDictionary::convert(const DECUMA_SRC_DICTIONARY_INFO &dictionaryInfo
         qCWarning(lcT9Write) << "Could not convert dictionary" << file.fileName();
         file.unmap((uchar *)sourceData);
         sourceSize = 0;
-        sourceData = 0;
+        sourceData = nullptr;
     }
 
     return status == decumaNoError;
@@ -114,7 +114,7 @@ qint64 T9WriteDictionary::size() const
 
 bool T9WriteDictionary::isConverted() const
 {
-    return convertedData != 0;
+    return convertedData != nullptr;
 }
 
 } // namespace QtVirtualKeyboard
diff --git a/src/plugins/t9write/plugin/t9writeinputmethod.cpp b/src/plugins/t9write/plugin/t9writeinputmethod.cpp
index 6bafca55..7c8927fc 100644
--- a/src/plugins/t9write/plugin/t9writeinputmethod.cpp
+++ b/src/plugins/t9write/plugin/t9writeinputmethod.cpp
@@ -126,13 +126,13 @@ public:
         engineMode(EngineUninitialized),
         defaultHwrDbPath(QLatin1String(":/QtQuick/VirtualKeyboard/T9Write/data/")),
         defaultDictionaryDbPath(defaultHwrDbPath),
-        dictionaryLock(QMutex::Recursive),
-        attachedDictionary(0),
         traceListHardLimit(32),
+        dictionaryLock(QMutex::Recursive),
+        attachedDictionary(nullptr),
         resultId(0),
         lastResultId(0),
         resultTimer(0),
-        decumaSession(0),
+        decumaSession(nullptr),
         activeWordIndex(-1),
         arcAdditionStarted(false),
         ignoreUpdate(false),
@@ -239,7 +239,7 @@ public:
         sessionSettings.charSet.nLanguages = languageCategories.size();
 
         session = QByteArray(DECUMA_API(GetSessionSize)(), 0);
-        decumaSession = (DECUMA_SESSION *)(!session.isEmpty() ? session.data() : 0);
+        decumaSession = (DECUMA_SESSION *)(!session.isEmpty() ? session.data() : nullptr);
 
         DECUMA_STATUS status = DECUMA_API(BeginSession)(decumaSession, &sessionSettings, &memFuncs);
         Q_ASSERT(status == decumaNoError);
@@ -287,7 +287,7 @@ public:
             DECUMA_API(StopLogging)(decumaSession);
 #endif
             DECUMA_API(EndSession)(decumaSession);
-            decumaSession = 0;
+            decumaSession = nullptr;
             session.clear();
         }
 
@@ -391,8 +391,8 @@ public:
     bool attachDictionary(const QSharedPointer<T9WriteDictionary> &dictionary)
     {
         QMutexLocker dictionaryGuard(&dictionaryLock);
-        Q_ASSERT(decumaSession != 0);
-        Q_ASSERT(dictionary != 0);
+        Q_ASSERT(decumaSession != nullptr);
+        Q_ASSERT(dictionary != nullptr);
         qCDebug(lcT9Write) << "T9WriteInputMethodPrivate::attachDictionary():" << dictionary->fileName();
 #if T9WRITEAPIMAJORVERNUM >= 20
         DECUMA_STATUS status = DECUMA_API(AttachDictionary)(decumaSession, dictionary->data(), dictionary->size());
@@ -410,7 +410,7 @@ public:
 
         qCDebug(lcT9Write) << "T9WriteInputMethodPrivate::detachDictionary():" << dictionary->fileName();
 
-        Q_ASSERT(decumaSession != 0);
+        Q_ASSERT(decumaSession != nullptr);
         DECUMA_STATUS status = DECUMA_API(DetachDictionary)(decumaSession, dictionary->data());
         Q_UNUSED(status)
         Q_ASSERT(status == decumaNoError);
@@ -1059,7 +1059,7 @@ public:
                       const QVariantMap &traceCaptureDeviceInfo, const QVariantMap &traceScreenInfo)
     {
         if (!worker)
-            return 0;
+            return nullptr;
 
         // The result id follows the trace id so that the (previous)
         // results completed during the handwriting can be rejected.
@@ -1212,7 +1212,7 @@ public:
 
         bool result = !traceList.isEmpty();
 
-        Q_ASSERT(decumaSession != 0);
+        Q_ASSERT(decumaSession != nullptr);
 
         stopResultTimer();
 
@@ -1666,7 +1666,7 @@ const DECUMA_MEM_FUNCTIONS T9WriteInputMethodPrivate::memFuncs = {
     T9WriteInputMethodPrivate::decumaMalloc,
     T9WriteInputMethodPrivate::decumaCalloc,
     T9WriteInputMethodPrivate::decumaFree,
-    NULL
+    nullptr
 };
 
 /*!
diff --git a/src/plugins/t9write/plugin/t9writeinputmethod_p.h b/src/plugins/t9write/plugin/t9writeinputmethod_p.h
index 45e62c47..c129aa2e 100644
--- a/src/plugins/t9write/plugin/t9writeinputmethod_p.h
+++ b/src/plugins/t9write/plugin/t9writeinputmethod_p.h
@@ -56,7 +56,7 @@ class T9WriteInputMethod : public AbstractInputMethod
     Q_DECLARE_PRIVATE(T9WriteInputMethod)
 
 public:
-    explicit T9WriteInputMethod(QObject *parent = 0);
+    explicit T9WriteInputMethod(QObject *parent = nullptr);
     ~T9WriteInputMethod();
 
     QList<InputEngine::InputMode> inputModes(const QString &locale);
diff --git a/src/plugins/t9write/plugin/t9writeworker.cpp b/src/plugins/t9write/plugin/t9writeworker.cpp
index 08719496..30cedc01 100644
--- a/src/plugins/t9write/plugin/t9writeworker.cpp
+++ b/src/plugins/t9write/plugin/t9writeworker.cpp
@@ -45,7 +45,7 @@ Q_DECLARE_LOGGING_CATEGORY(lcT9Write)
 
 T9WriteTask::T9WriteTask(QObject *parent) :
     QObject(parent),
-    decumaSession(0),
+    decumaSession(nullptr),
     runSema()
 {
 }
@@ -205,7 +205,7 @@ void T9WriteRecognitionTask::run()
     interruptFunctions.pUserData = (void *)this;
     DECUMA_INTERRUPT_FUNCTIONS *pInterruptFunctions = &interruptFunctions;
 #else
-    DECUMA_INTERRUPT_FUNCTIONS *pInterruptFunctions = NULL;
+    DECUMA_INTERRUPT_FUNCTIONS *pInterruptFunctions = nullptr;
 #endif
     result->status = DECUMA_API(Recognize)(decumaSession, result->results.data(), result->results.size(), &result->numResults, result->maxCharsPerWord, &recSettings, pInterruptFunctions);
     if (result->status != decumaNoError)
@@ -240,7 +240,7 @@ bool T9WriteRecognitionTask::cancelRecognition()
 
 int T9WriteRecognitionTask::resultId() const
 {
-    return result != 0 ? result->id : -1;
+    return result != nullptr ? result->id : -1;
 }
 
 /*!
diff --git a/src/plugins/t9write/plugin/t9writeworker_p.h b/src/plugins/t9write/plugin/t9writeworker_p.h
index 76807764..f49e7519 100644
--- a/src/plugins/t9write/plugin/t9writeworker_p.h
+++ b/src/plugins/t9write/plugin/t9writeworker_p.h
@@ -62,7 +62,7 @@ class T9WriteTask : public QObject
 {
     Q_OBJECT
 public:
-    explicit T9WriteTask(QObject *parent = 0);
+    explicit T9WriteTask(QObject *parent = nullptr);
 
     virtual void run() = 0;
 
@@ -177,7 +177,7 @@ class T9WriteWorker : public QThread
 {
     Q_OBJECT
 public:
-    explicit T9WriteWorker(DECUMA_SESSION *decumaSession, const bool cjk, QObject *parent = 0);
+    explicit T9WriteWorker(DECUMA_SESSION *decumaSession, const bool cjk, QObject *parent = nullptr);
     ~T9WriteWorker();
 
     void addTask(QSharedPointer<T9WriteTask> task);
diff --git a/src/plugins/tcime/plugin/tcinputmethod.cpp b/src/plugins/tcime/plugin/tcinputmethod.cpp
index 10c89228..e6acb859 100644
--- a/src/plugins/tcime/plugin/tcinputmethod.cpp
+++ b/src/plugins/tcime/plugin/tcinputmethod.cpp
@@ -59,7 +59,7 @@ public:
     TCInputMethodPrivate(TCInputMethod *q_ptr) :
         q_ptr(q_ptr),
         inputMode(InputEngine::Latin),
-        wordDictionary(0),
+        wordDictionary(nullptr),
         highlightIndex(-1)
     {}
 
@@ -370,7 +370,7 @@ bool TCInputMethod::setInputMode(const QString &locale, InputEngine::InputMode i
     update();
     bool result = false;
     d->inputMode = inputMode;
-    d->wordDictionary = 0;
+    d->wordDictionary = nullptr;
 #if defined(HAVE_TCIME_CANGJIE)
     if (inputMode == InputEngine::Cangjie) {
         if (d->cangjieDictionary.isEmpty()) {
diff --git a/src/plugins/tcime/plugin/tcinputmethod_p.h b/src/plugins/tcime/plugin/tcinputmethod_p.h
index 887bc4e0..4c29d5d3 100644
--- a/src/plugins/tcime/plugin/tcinputmethod_p.h
+++ b/src/plugins/tcime/plugin/tcinputmethod_p.h
@@ -55,7 +55,7 @@ class TCInputMethod : public AbstractInputMethod
     Q_PROPERTY(bool simplified READ simplified WRITE setSimplified NOTIFY simplifiedChanged)
 
 public:
-    explicit TCInputMethod(QObject *parent = 0);
+    explicit TCInputMethod(QObject *parent = nullptr);
     ~TCInputMethod();
 
     bool simplified() const;
diff --git a/src/styles/styles_plugin.h b/src/styles/styles_plugin.h
index 0eca2e9b..c9147c59 100644
--- a/src/styles/styles_plugin.h
+++ b/src/styles/styles_plugin.h
@@ -38,7 +38,7 @@ class QtVirtualKeyboardStylesPlugin : public QQmlExtensionPlugin
     Q_PLUGIN_METADATA(IID QQmlExtensionInterface_iid)
 
 public:
-    QtVirtualKeyboardStylesPlugin(QObject *parent = 0) : QQmlExtensionPlugin(parent) { }
+    QtVirtualKeyboardStylesPlugin(QObject *parent = nullptr) : QQmlExtensionPlugin(parent) { }
     void registerTypes(const char *uri);
     void initializeEngine(QQmlEngine *engine, const char *uri);
 };
diff --git a/src/virtualkeyboard/abstractinputmethod.cpp b/src/virtualkeyboard/abstractinputmethod.cpp
index eaf04d67..fc18936d 100644
--- a/src/virtualkeyboard/abstractinputmethod.cpp
+++ b/src/virtualkeyboard/abstractinputmethod.cpp
@@ -47,7 +47,7 @@ public:
 */
 
 AbstractInputMethodPrivate::AbstractInputMethodPrivate() :
-    inputEngine(0)
+    inputEngine(nullptr)
 {
 }
 
@@ -84,7 +84,7 @@ AbstractInputMethod::~AbstractInputMethod()
 InputContext *AbstractInputMethod::inputContext() const
 {
     Q_D(const AbstractInputMethod);
-    return d->inputEngine ? d->inputEngine->inputContext() : 0;
+    return d->inputEngine ? d->inputEngine->inputContext() : nullptr;
 }
 
 /*!
@@ -197,7 +197,7 @@ Trace *AbstractInputMethod::traceBegin(int traceId, InputEngine::PatternRecognit
     Q_UNUSED(patternRecognitionMode)
     Q_UNUSED(traceCaptureDeviceInfo)
     Q_UNUSED(traceScreenInfo)
-    return 0;
+    return nullptr;
 }
 
 /*!
diff --git a/src/virtualkeyboard/abstractinputmethod.h b/src/virtualkeyboard/abstractinputmethod.h
index bcac3251..d211e13b 100644
--- a/src/virtualkeyboard/abstractinputmethod.h
+++ b/src/virtualkeyboard/abstractinputmethod.h
@@ -44,7 +44,7 @@ class QVIRTUALKEYBOARD_EXPORT AbstractInputMethod : public QObject
     Q_DECLARE_PRIVATE(AbstractInputMethod)
 
 public:
-    explicit AbstractInputMethod(QObject *parent = 0);
+    explicit AbstractInputMethod(QObject *parent = nullptr);
     ~AbstractInputMethod();
 
     InputContext *inputContext() const;
diff --git a/src/virtualkeyboard/abstractinputpanel_p.h b/src/virtualkeyboard/abstractinputpanel_p.h
index 46bb1738..08a19fc6 100644
--- a/src/virtualkeyboard/abstractinputpanel_p.h
+++ b/src/virtualkeyboard/abstractinputpanel_p.h
@@ -51,9 +51,9 @@ class QVIRTUALKEYBOARD_EXPORT AbstractInputPanel : public QObject
 {
     Q_OBJECT
 protected:
-    AbstractInputPanel(QObjectPrivate &dd, QObject *parent = 0);
+    AbstractInputPanel(QObjectPrivate &dd, QObject *parent = nullptr);
 public:
-    explicit AbstractInputPanel(QObject *parent = 0);
+    explicit AbstractInputPanel(QObject *parent = nullptr);
     ~AbstractInputPanel();
 
     virtual void show() = 0;
diff --git a/src/virtualkeyboard/appinputpanel_p.h b/src/virtualkeyboard/appinputpanel_p.h
index 8363e80a..d1db9dad 100644
--- a/src/virtualkeyboard/appinputpanel_p.h
+++ b/src/virtualkeyboard/appinputpanel_p.h
@@ -59,10 +59,10 @@ class QVIRTUALKEYBOARD_EXPORT AppInputPanel : public AbstractInputPanel
     Q_DECLARE_PRIVATE(AppInputPanel)
 
 protected:
-    AppInputPanel(AppInputPanelPrivate &dd, QObject *parent = 0);
+    AppInputPanel(AppInputPanelPrivate &dd, QObject *parent = nullptr);
 
 public:
-    explicit AppInputPanel(QObject *parent = 0);
+    explicit AppInputPanel(QObject *parent = nullptr);
     ~AppInputPanel();
 
     void show();
diff --git a/src/virtualkeyboard/desktopinputpanel_p.h b/src/virtualkeyboard/desktopinputpanel_p.h
index eea026ce..688a155e 100644
--- a/src/virtualkeyboard/desktopinputpanel_p.h
+++ b/src/virtualkeyboard/desktopinputpanel_p.h
@@ -56,7 +56,7 @@ class QVIRTUALKEYBOARD_EXPORT DesktopInputPanel : public AppInputPanel
     Q_OBJECT
     Q_DECLARE_PRIVATE(DesktopInputPanel)
 public:
-    explicit DesktopInputPanel(QObject *parent = 0);
+    explicit DesktopInputPanel(QObject *parent = nullptr);
     ~DesktopInputPanel();
 
     void show();
diff --git a/src/virtualkeyboard/fallbackinputmethod_p.h b/src/virtualkeyboard/fallbackinputmethod_p.h
index d8da7d80..d4f40e89 100644
--- a/src/virtualkeyboard/fallbackinputmethod_p.h
+++ b/src/virtualkeyboard/fallbackinputmethod_p.h
@@ -51,7 +51,7 @@ class QVIRTUALKEYBOARD_EXPORT FallbackInputMethod : public AbstractInputMethod
     Q_OBJECT
 
 public:
-    explicit FallbackInputMethod(QObject *parent = 0);
+    explicit FallbackInputMethod(QObject *parent = nullptr);
 
     QList<InputEngine::InputMode> inputModes(const QString &locale);
     bool setInputMode(const QString &locale, InputEngine::InputMode inputMode);
diff --git a/src/virtualkeyboard/gesturerecognizer_p.h b/src/virtualkeyboard/gesturerecognizer_p.h
index a4b95827..431656eb 100644
--- a/src/virtualkeyboard/gesturerecognizer_p.h
+++ b/src/virtualkeyboard/gesturerecognizer_p.h
@@ -53,7 +53,7 @@ class QVIRTUALKEYBOARD_EXPORT GestureRecognizer : public QObject
 {
     Q_OBJECT
 public:
-    explicit GestureRecognizer(QObject *parent = 0);
+    explicit GestureRecognizer(QObject *parent = nullptr);
 
     virtual QVariantMap recognize(const QList<Trace *> traceList) = 0;
 };
diff --git a/src/virtualkeyboard/handwritinggesturerecognizer_p.h b/src/virtualkeyboard/handwritinggesturerecognizer_p.h
index c1393803..21991cef 100644
--- a/src/virtualkeyboard/handwritinggesturerecognizer_p.h
+++ b/src/virtualkeyboard/handwritinggesturerecognizer_p.h
@@ -50,7 +50,7 @@ class QVIRTUALKEYBOARD_EXPORT HandwritingGestureRecognizer : public GestureRecog
 {
     Q_OBJECT
 public:
-    explicit HandwritingGestureRecognizer(QObject *parent = 0);
+    explicit HandwritingGestureRecognizer(QObject *parent = nullptr);
 
     void setDpi(int dpi);
     int dpi() const;
diff --git a/src/virtualkeyboard/inputcontext.cpp b/src/virtualkeyboard/inputcontext.cpp
index 33724104..bc4dc7d7 100644
--- a/src/virtualkeyboard/inputcontext.cpp
+++ b/src/virtualkeyboard/inputcontext.cpp
@@ -73,9 +73,9 @@ public:
 
     InputContextPrivate() :
         QObjectPrivate(),
-        inputContext(0),
-        inputEngine(0),
-        shiftHandler(0),
+        inputContext(nullptr),
+        inputEngine(nullptr),
+        shiftHandler(nullptr),
         keyboardRect(),
         previewRect(),
         previewVisible(false),
@@ -391,7 +391,7 @@ void InputContext::updateAvailableLocales(const QStringList &availableLocales)
 QObject *InputContext::inputItem() const
 {
     Q_D(const InputContext);
-    return d->inputContext ? d->inputContext->focusObject() : 0;
+    return d->inputContext ? d->inputContext->focusObject() : nullptr;
 }
 
 ShiftHandler *InputContext::shiftHandler() const
@@ -558,7 +558,7 @@ bool InputContext::fileExists(const QUrl &fileUrl)
 */
 bool InputContext::hasEnterKeyAction(QObject *item) const
 {
-    return item != 0 && qmlAttachedPropertiesObject<EnterKeyAction>(item, false);
+    return item != nullptr && qmlAttachedPropertiesObject<EnterKeyAction>(item, false);
 }
 
 /*!
diff --git a/src/virtualkeyboard/inputcontext.h b/src/virtualkeyboard/inputcontext.h
index bfb349c6..839c8f10 100644
--- a/src/virtualkeyboard/inputcontext.h
+++ b/src/virtualkeyboard/inputcontext.h
@@ -77,7 +77,7 @@ class QVIRTUALKEYBOARD_EXPORT InputContext : public QObject
     Q_PROPERTY(ShadowInputContext *shadow READ shadow CONSTANT)
 
 public:
-    explicit InputContext(PlatformInputContext *parent = 0);
+    explicit InputContext(PlatformInputContext *parent = nullptr);
     ~InputContext();
 
     bool focus() const;
diff --git a/src/virtualkeyboard/inputengine.cpp b/src/virtualkeyboard/inputengine.cpp
index 429ca92a..7763fc9b 100644
--- a/src/virtualkeyboard/inputengine.cpp
+++ b/src/virtualkeyboard/inputengine.cpp
@@ -47,8 +47,8 @@ public:
     InputEnginePrivate(InputEngine *q_ptr) :
         QObjectPrivate(),
         q_ptr(q_ptr),
-        inputContext(0),
-        fallbackInputMethod(0),
+        inputContext(nullptr),
+        fallbackInputMethod(nullptr),
         textCase(InputEngine::Lower),
         inputMode(InputEngine::Latin),
         activeKey(Qt::Key_unknown),
@@ -368,7 +368,7 @@ void InputEngine::setInputMethod(AbstractInputMethod *inputMethod)
         update();
         if (d->inputMethod) {
             QObject::disconnect(d->inputMethod.data(), &AbstractInputMethod::selectionListsChanged, this, &InputEngine::updateSelectionListModels);
-            d->inputMethod->setInputEngine(0);
+            d->inputMethod->setInputEngine(nullptr);
         }
         d->inputMethod = inputMethod;
         if (d->inputMethod) {
@@ -436,7 +436,7 @@ bool InputEngine::wordCandidateListVisibleHint() const
     const auto it = d->selectionListModels.constFind(SelectionListModel::WordCandidateList);
     if (it == d->selectionListModels.cend())
         return false;
-    return it.value()->dataSource() != 0;
+    return it.value()->dataSource() != nullptr;
 }
 
 /*!
@@ -509,11 +509,11 @@ Trace *InputEngine::traceBegin(
                             << "traceCaptureDeviceInfo:" << traceCaptureDeviceInfo
                             << "traceScreenInfo:" << traceScreenInfo;
     if (!d->inputMethod)
-        return 0;
+        return nullptr;
     if (patternRecognitionMode == PatternRecognitionDisabled)
-        return 0;
+        return nullptr;
     if (!d->inputMethod->patternRecognitionModes().contains(patternRecognitionMode))
-        return 0;
+        return nullptr;
     Trace *trace = d->inputMethod->traceBegin(traceId, patternRecognitionMode, traceCaptureDeviceInfo, traceScreenInfo);
     if (trace)
         trace->setTraceId(traceId);
@@ -644,7 +644,7 @@ void InputEngine::updateSelectionListModels()
     for (const SelectionListModel::Type &selectionListType : qAsConst(inactiveSelectionLists)) {
         const auto it = d->selectionListModels.constFind(selectionListType);
         if (it != d->selectionListModels.cend()) {
-            it.value()->setDataSource(0, selectionListType);
+            it.value()->setDataSource(nullptr, selectionListType);
             if (selectionListType == SelectionListModel::WordCandidateList)
                 emit wordCandidateListVisibleHintChanged();
         }
diff --git a/src/virtualkeyboard/inputengine.h b/src/virtualkeyboard/inputengine.h
index aa968252..5880e844 100644
--- a/src/virtualkeyboard/inputengine.h
+++ b/src/virtualkeyboard/inputengine.h
@@ -58,7 +58,7 @@ class QVIRTUALKEYBOARD_EXPORT InputEngine : public QObject
     Q_PROPERTY(SelectionListModel *wordCandidateListModel READ wordCandidateListModel NOTIFY wordCandidateListModelChanged)
     Q_PROPERTY(bool wordCandidateListVisibleHint READ wordCandidateListVisibleHint NOTIFY wordCandidateListVisibleHintChanged)
 
-    explicit InputEngine(InputContext *parent = 0);
+    explicit InputEngine(InputContext *parent = nullptr);
 
 public:
     enum TextCase {
diff --git a/src/virtualkeyboard/inputmethod_p.h b/src/virtualkeyboard/inputmethod_p.h
index 0e84221c..09591d62 100644
--- a/src/virtualkeyboard/inputmethod_p.h
+++ b/src/virtualkeyboard/inputmethod_p.h
@@ -53,7 +53,7 @@ class QVIRTUALKEYBOARD_EXPORT InputMethod : public AbstractInputMethod
     Q_PROPERTY(InputEngine *inputEngine READ inputEngine CONSTANT)
 
 public:
-    explicit InputMethod(QObject *parent = 0);
+    explicit InputMethod(QObject *parent = nullptr);
     ~InputMethod();
 
     QList<InputEngine::InputMode> inputModes(const QString &locale);
diff --git a/src/virtualkeyboard/inputview_p.h b/src/virtualkeyboard/inputview_p.h
index 256d0ae6..cdbd6a2f 100644
--- a/src/virtualkeyboard/inputview_p.h
+++ b/src/virtualkeyboard/inputview_p.h
@@ -51,7 +51,7 @@ class QVIRTUALKEYBOARD_EXPORT InputView : public QQuickView
 {
     Q_OBJECT
 public:
-    explicit InputView(QWindow *parent = 0);
+    explicit InputView(QWindow *parent = nullptr);
 
 signals:
     void sizeChanged();
diff --git a/src/virtualkeyboard/plaininputmethod_p.h b/src/virtualkeyboard/plaininputmethod_p.h
index d1f7e01c..44f97a6a 100644
--- a/src/virtualkeyboard/plaininputmethod_p.h
+++ b/src/virtualkeyboard/plaininputmethod_p.h
@@ -51,7 +51,7 @@ class QVIRTUALKEYBOARD_EXPORT PlainInputMethod : public AbstractInputMethod
     Q_OBJECT
 
 public:
-    explicit PlainInputMethod(QObject *parent = 0);
+    explicit PlainInputMethod(QObject *parent = nullptr);
     ~PlainInputMethod();
 
     QList<InputEngine::InputMode> inputModes(const QString &locale);
diff --git a/src/virtualkeyboard/platforminputcontext.cpp b/src/virtualkeyboard/platforminputcontext.cpp
index 030381c2..c7a8fc82 100644
--- a/src/virtualkeyboard/platforminputcontext.cpp
+++ b/src/virtualkeyboard/platforminputcontext.cpp
@@ -51,12 +51,12 @@ Q_LOGGING_CATEGORY(qlcVirtualKeyboard, "qt.virtualkeyboard")
 */
 
 PlatformInputContext::PlatformInputContext() :
-    m_inputContext(0),
-    m_inputPanel(0),
-    m_focusObject(0),
+    m_inputContext(nullptr),
+    m_inputPanel(nullptr),
+    m_focusObject(nullptr),
     m_locale(),
     m_inputDirection(m_locale.textDirection()),
-    m_filterEvent(0),
+    m_filterEvent(nullptr),
     m_visible(false)
 {
 }
@@ -185,8 +185,8 @@ QObject *PlatformInputContext::focusObject()
 void PlatformInputContext::setFocusObject(QObject *object)
 {
     VIRTUALKEYBOARD_DEBUG() << "PlatformInputContext::setFocusObject():" << object;
-    Q_ASSERT(m_inputContext == 0 ||
-             m_inputContext->shadow()->inputItem() == 0 ||
+    Q_ASSERT(m_inputContext == nullptr ||
+             m_inputContext->shadow()->inputItem() == nullptr ||
              m_inputContext->shadow()->inputItem() != object);
     if (m_focusObject != object) {
         if (m_focusObject)
@@ -216,18 +216,18 @@ void PlatformInputContext::sendEvent(QEvent *event)
     if (m_focusObject) {
         m_filterEvent = event;
         QGuiApplication::sendEvent(m_focusObject, event);
-        m_filterEvent = 0;
+        m_filterEvent = nullptr;
     }
 }
 
 void PlatformInputContext::sendKeyEvent(QKeyEvent *event)
 {
     const QGuiApplication *app = qApp;
-    QWindow *focusWindow = app ? app->focusWindow() : 0;
+    QWindow *focusWindow = app ? app->focusWindow() : nullptr;
     if (focusWindow) {
         m_filterEvent = event;
         QGuiApplication::sendEvent(focusWindow, event);
-        m_filterEvent = 0;
+        m_filterEvent = nullptr;
     }
 }
 
@@ -249,7 +249,7 @@ void PlatformInputContext::setInputContext(InputContext *context)
             m_inputPanel = new AppInputPanel(this);
         connect(m_inputContext, SIGNAL(keyboardRectangleChanged()), SLOT(keyboardRectangleChanged()));
     } else if (m_inputPanel) {
-        m_inputPanel = 0;
+        m_inputPanel = nullptr;
     }
 }
 
diff --git a/src/virtualkeyboard/selectionlistmodel.cpp b/src/virtualkeyboard/selectionlistmodel.cpp
index 30b288a2..4718669f 100644
--- a/src/virtualkeyboard/selectionlistmodel.cpp
+++ b/src/virtualkeyboard/selectionlistmodel.cpp
@@ -41,7 +41,7 @@ class SelectionListModelPrivate : public QAbstractItemModelPrivate
 public:
     SelectionListModelPrivate() :
         QAbstractItemModelPrivate(),
-        dataSource(0),
+        dataSource(nullptr),
         type(SelectionListModel::WordCandidateList),
         rowCount(0),
         wclAutoCommitWord(false)
@@ -147,7 +147,7 @@ void SelectionListModel::setDataSource(AbstractInputMethod *dataSource, Type typ
     }
     d->type = type;
     if (d->dataSource) {
-        d->dataSource = 0;
+        d->dataSource = nullptr;
         selectionListChanged(type);
         selectionListActiveItemChanged(type, -1);
     }
diff --git a/src/virtualkeyboard/selectionlistmodel.h b/src/virtualkeyboard/selectionlistmodel.h
index 274e3e67..ec9b84e3 100644
--- a/src/virtualkeyboard/selectionlistmodel.h
+++ b/src/virtualkeyboard/selectionlistmodel.h
@@ -46,7 +46,7 @@ class QVIRTUALKEYBOARD_EXPORT SelectionListModel : public QAbstractListModel
     Q_DECLARE_PRIVATE(SelectionListModel)
     Q_PROPERTY(int count READ count NOTIFY countChanged)
 
-    explicit SelectionListModel(QObject *parent = 0);
+    explicit SelectionListModel(QObject *parent = nullptr);
 
 public:
     enum Type
diff --git a/src/virtualkeyboard/settings_p.h b/src/virtualkeyboard/settings_p.h
index d3e48b98..843592fe 100644
--- a/src/virtualkeyboard/settings_p.h
+++ b/src/virtualkeyboard/settings_p.h
@@ -56,7 +56,7 @@ class QVIRTUALKEYBOARD_EXPORT Settings : public QObject
     Q_DISABLE_COPY(Settings)
     Q_DECLARE_PRIVATE(Settings)
 
-    Settings(QObject *parent = 0);
+    Settings(QObject *parent = nullptr);
 
 public:
     static Settings *instance();
diff --git a/src/virtualkeyboard/shadowinputcontext.cpp b/src/virtualkeyboard/shadowinputcontext.cpp
index eea08f89..e3cff2d7 100644
--- a/src/virtualkeyboard/shadowinputcontext.cpp
+++ b/src/virtualkeyboard/shadowinputcontext.cpp
@@ -45,7 +45,7 @@ class ShadowInputContextPrivate : public QObjectPrivate
 public:
     ShadowInputContextPrivate() :
         QObjectPrivate(),
-        inputContext(0),
+        inputContext(nullptr),
         anchorRectIntersectsClipRect(false),
         cursorRectIntersectsClipRect(false),
         selectionControlVisible(false)
diff --git a/src/virtualkeyboard/shadowinputcontext_p.h b/src/virtualkeyboard/shadowinputcontext_p.h
index 17de9dc0..3f9effa1 100644
--- a/src/virtualkeyboard/shadowinputcontext_p.h
+++ b/src/virtualkeyboard/shadowinputcontext_p.h
@@ -65,7 +65,7 @@ class QVIRTUALKEYBOARD_EXPORT ShadowInputContext : public QObject
     Q_PROPERTY(bool cursorRectIntersectsClipRect READ cursorRectIntersectsClipRect NOTIFY cursorRectIntersectsClipRectChanged)
     Q_PROPERTY(bool selectionControlVisible READ selectionControlVisible NOTIFY selectionControlVisibleChanged)
 
-    explicit ShadowInputContext(QObject *parent = 0);
+    explicit ShadowInputContext(QObject *parent = nullptr);
 
     void setInputContext(InputContext *inputContext);
 
diff --git a/src/virtualkeyboard/shifthandler.cpp b/src/virtualkeyboard/shifthandler.cpp
index 510dc3ae..f27a9727 100644
--- a/src/virtualkeyboard/shifthandler.cpp
+++ b/src/virtualkeyboard/shifthandler.cpp
@@ -44,7 +44,7 @@ class ShiftHandlerPrivate : public QObjectPrivate
 public:
     ShiftHandlerPrivate() :
         QObjectPrivate(),
-        inputContext(0),
+        inputContext(nullptr),
         sentenceEndingCharacters(QString(".!?") + QChar(Qt::Key_exclamdown) + QChar(Qt::Key_questiondown)),
         autoCapitalizationEnabled(false),
         toggleShiftEnabled(false),
diff --git a/src/virtualkeyboard/shifthandler_p.h b/src/virtualkeyboard/shifthandler_p.h
index 8c08f363..d7a31d14 100644
--- a/src/virtualkeyboard/shifthandler_p.h
+++ b/src/virtualkeyboard/shifthandler_p.h
@@ -59,7 +59,7 @@ class QVIRTUALKEYBOARD_EXPORT ShiftHandler : public QObject
     Q_PROPERTY(bool autoCapitalizationEnabled READ autoCapitalizationEnabled NOTIFY autoCapitalizationEnabledChanged)
     Q_PROPERTY(bool toggleShiftEnabled READ toggleShiftEnabled NOTIFY toggleShiftEnabledChanged)
 
-    explicit ShiftHandler(InputContext *parent = 0);
+    explicit ShiftHandler(InputContext *parent = nullptr);
 
 public:
     ~ShiftHandler();
diff --git a/src/virtualkeyboard/trace.h b/src/virtualkeyboard/trace.h
index 53709ef4..585cc073 100644
--- a/src/virtualkeyboard/trace.h
+++ b/src/virtualkeyboard/trace.h
@@ -50,7 +50,7 @@ class QVIRTUALKEYBOARD_EXPORT Trace : public QObject
     Q_PROPERTY(bool isFinal READ isFinal WRITE setFinal NOTIFY finalChanged)
     Q_PROPERTY(bool isCanceled READ isCanceled WRITE setCanceled NOTIFY canceledChanged)
 public:
-    explicit Trace(QObject *parent = 0);
+    explicit Trace(QObject *parent = nullptr);
     ~Trace();
 
     int traceId() const;
diff --git a/src/virtualkeyboard/unipentrace_p.h b/src/virtualkeyboard/unipentrace_p.h
index f61ff50b..10c6786b 100644
--- a/src/virtualkeyboard/unipentrace_p.h
+++ b/src/virtualkeyboard/unipentrace_p.h
@@ -51,7 +51,7 @@ class UnipenTrace : public QObject
 {
     Q_OBJECT
 public:
-    explicit UnipenTrace(const QVariantMap &traceCaptureDeviceInfo, const QVariantMap &traceScreenInfo, QObject *parent = 0);
+    explicit UnipenTrace(const QVariantMap &traceCaptureDeviceInfo, const QVariantMap &traceScreenInfo, QObject *parent = nullptr);
 
     void record(const QList<Trace *> &traceList);
     void save(uint unicode, uint confidence);
diff --git a/src/virtualkeyboard/virtualkeyboardsettings_p.h b/src/virtualkeyboard/virtualkeyboardsettings_p.h
index adcfd7a6..7acb8268 100644
--- a/src/virtualkeyboard/virtualkeyboardsettings_p.h
+++ b/src/virtualkeyboard/virtualkeyboardsettings_p.h
@@ -110,7 +110,7 @@ class QVIRTUALKEYBOARD_EXPORT WordCandidateListSettings : public QObject
     Q_PROPERTY(bool alwaysVisible READ alwaysVisible WRITE setAlwaysVisible NOTIFY alwaysVisibleChanged)
     Q_PROPERTY(bool autoCommitWord READ autoCommitWord WRITE setAutoCommitWord NOTIFY autoCommitWordChanged)
 
-    explicit WordCandidateListSettings(QObject *parent = 0);
+    explicit WordCandidateListSettings(QObject *parent = nullptr);
     friend class VirtualKeyboardSettingsPrivate;
 
 public: