Modernize code base

Run clang-tidy over the code base with some code modernization
options.

Change-Id: I9e74d1225bce333e74224e3b92c02c7e9884d8f5
Reviewed-by: Lars Knoll <lars.knoll@qt.io>
Reviewed-by: Doris Verria <doris.verria@qt.io>

8 files changed, 25 insertions, 26 deletions

diff --git a/examples/multimedia/spectrum/app/engine.cpp b/examples/multimedia/spectrum/app/engine.cpp
index f934f8788..b7cbe13a4 100644
--- a/examples/multimedia/spectrum/app/engine.cpp
+++ b/examples/multimedia/spectrum/app/engine.cpp
@@ -82,18 +82,18 @@ Engine::Engine(QObject *parent)
     ,   m_mode(QAudio::AudioInput)
     ,   m_state(QAudio::StoppedState)
     ,   m_generateTone(false)
-    ,   m_file(0)
-    ,   m_analysisFile(0)
+    ,   m_file(nullptr)
+    ,   m_analysisFile(nullptr)
     ,   m_availableAudioInputDevices
             (QAudioDeviceInfo::availableDevices(QAudio::AudioInput))
     ,   m_audioInputDevice(QAudioDeviceInfo::defaultInputDevice())
-    ,   m_audioInput(0)
-    ,   m_audioInputIODevice(0)
+    ,   m_audioInput(nullptr)
+    ,   m_audioInputIODevice(nullptr)
     ,   m_recordPosition(0)
     ,   m_availableAudioOutputDevices
             (QAudioDeviceInfo::availableDevices(QAudio::AudioOutput))
     ,   m_audioOutputDevice(QAudioDeviceInfo::defaultOutputDevice())
-    ,   m_audioOutput(0)
+    ,   m_audioOutput(nullptr)
     ,   m_playPosition(0)
     ,   m_bufferPosition(0)
     ,   m_bufferLength(0)
@@ -102,7 +102,6 @@ Engine::Engine(QObject *parent)
     ,   m_rmsLevel(0.0)
     ,   m_peakLevel(0.0)
     ,   m_spectrumBufferLength(0)
-    ,   m_spectrumAnalyser()
     ,   m_spectrumPosition(0)
     ,   m_count(0)
 {
@@ -451,11 +450,11 @@ void Engine::spectrumChanged(const FrequencySpectrum &spectrum)
 void Engine::resetAudioDevices()
 {
     delete m_audioInput;
-    m_audioInput = 0;
-    m_audioInputIODevice = 0;
+    m_audioInput = nullptr;
+    m_audioInputIODevice = nullptr;
     setRecordPosition(0);
     delete m_audioOutput;
-    m_audioOutput = 0;
+    m_audioOutput = nullptr;
     setPlayPosition(0);
     m_spectrumPosition = 0;
     setLevel(0.0, 0.0, 0);
@@ -469,9 +468,9 @@ void Engine::reset()
     setFormat(QAudioFormat());
     m_generateTone = false;
     delete m_file;
-    m_file = 0;
+    m_file = nullptr;
     delete m_analysisFile;
-    m_analysisFile = 0;
+    m_analysisFile = nullptr;
     m_buffer.clear();
     m_bufferPosition = 0;
     m_bufferLength = 0;
@@ -622,7 +621,7 @@ void Engine::stopRecording()
         QCoreApplication::instance()->processEvents();
         m_audioInput->disconnect();
     }
-    m_audioInputIODevice = 0;
+    m_audioInputIODevice = nullptr;
 
 #ifdef DUMP_AUDIO
     dumpData();
diff --git a/examples/multimedia/spectrum/app/mainwidget.cpp b/examples/multimedia/spectrum/app/mainwidget.cpp
index d6163f7f9..ff063f53c 100644
--- a/examples/multimedia/spectrum/app/mainwidget.cpp
+++ b/examples/multimedia/spectrum/app/mainwidget.cpp
@@ -93,9 +93,9 @@ MainWidget::MainWidget(QWidget *parent)
             this))
     ,   m_toneGeneratorDialog(new ToneGeneratorDialog(this))
     ,   m_modeMenu(new QMenu(this))
-    ,   m_loadFileAction(0)
-    ,   m_generateToneAction(0)
-    ,   m_recordAction(0)
+    ,   m_loadFileAction(nullptr)
+    ,   m_generateToneAction(nullptr)
+    ,   m_recordAction(nullptr)
 {
     m_spectrograph->setParams(SpectrumNumBands, SpectrumLowFreq, SpectrumHighFreq);
 
diff --git a/examples/multimedia/spectrum/app/spectrumanalyser.cpp b/examples/multimedia/spectrum/app/spectrumanalyser.cpp
index 6daa1c6aa..d0d1d6cf5 100644
--- a/examples/multimedia/spectrum/app/spectrumanalyser.cpp
+++ b/examples/multimedia/spectrum/app/spectrumanalyser.cpp
@@ -74,7 +74,7 @@ SpectrumAnalyserThread::SpectrumAnalyserThread(QObject *parent)
 {
 #ifdef SPECTRUM_ANALYSER_SEPARATE_THREAD
     // moveToThread() cannot be called on a QObject with a parent
-    setParent(0);
+    setParent(nullptr);
     moveToThread(m_thread);
     m_thread->start();
 #endif
diff --git a/examples/multimedia/spectrum/app/waveform.cpp b/examples/multimedia/spectrum/app/waveform.cpp
index 3e7462157..f0b6de672 100644
--- a/examples/multimedia/spectrum/app/waveform.cpp
+++ b/examples/multimedia/spectrum/app/waveform.cpp
@@ -189,7 +189,7 @@ void Waveform::initialize(const QAudioFormat &format, qint64 audioBufferSize, qi
                    << "windowLength" << m_windowLength
                    << "nTiles" << nTiles;
 
-    m_pixmaps.fill(0, nTiles);
+    m_pixmaps.fill(nullptr, nTiles);
     m_tiles.resize(nTiles);
 
     createPixmaps(rect().size());
diff --git a/examples/multimediawidgets/customvideosurface/customvideoitem/videoplayer.cpp b/examples/multimediawidgets/customvideosurface/customvideoitem/videoplayer.cpp
index 2a9900c2b..a3daec3aa 100644
--- a/examples/multimediawidgets/customvideosurface/customvideoitem/videoplayer.cpp
+++ b/examples/multimediawidgets/customvideosurface/customvideoitem/videoplayer.cpp
@@ -60,10 +60,10 @@
 
 VideoPlayer::VideoPlayer(QWidget *parent)
     : QWidget(parent)
-    , mediaPlayer(0, QMediaPlayer::VideoSurface)
-    , videoItem(0)
-    , playButton(0)
-    , positionSlider(0)
+    , mediaPlayer(nullptr, QMediaPlayer::VideoSurface)
+    , videoItem(nullptr)
+    , playButton(nullptr)
+    , positionSlider(nullptr)
 {
     videoItem = new VideoItem;
 
diff --git a/examples/multimediawidgets/customvideosurface/customvideowidget/videoplayer.cpp b/examples/multimediawidgets/customvideosurface/customvideowidget/videoplayer.cpp
index 5c1ca4221..4ee3c5ea9 100644
--- a/examples/multimediawidgets/customvideosurface/customvideowidget/videoplayer.cpp
+++ b/examples/multimediawidgets/customvideosurface/customvideowidget/videoplayer.cpp
@@ -57,9 +57,9 @@
 
 VideoPlayer::VideoPlayer(QWidget *parent)
     : QWidget(parent)
-    , mediaPlayer(0, QMediaPlayer::VideoSurface)
-    , playButton(0)
-    , positionSlider(0)
+    , mediaPlayer(nullptr, QMediaPlayer::VideoSurface)
+    , playButton(nullptr)
+    , positionSlider(nullptr)
 {
     VideoWidget *videoWidget = new VideoWidget;
 
diff --git a/examples/multimediawidgets/customvideosurface/customvideowidget/videowidget.cpp b/examples/multimediawidgets/customvideosurface/customvideowidget/videowidget.cpp
index 12ac34a35..aae032ca3 100644
--- a/examples/multimediawidgets/customvideosurface/customvideowidget/videowidget.cpp
+++ b/examples/multimediawidgets/customvideosurface/customvideowidget/videowidget.cpp
@@ -58,7 +58,7 @@
 //! [0]
 VideoWidget::VideoWidget(QWidget *parent)
     : QWidget(parent)
-    , surface(0)
+    , surface(nullptr)
 {
     setAutoFillBackground(false);
     setAttribute(Qt::WA_NoSystemBackground, true);
diff --git a/examples/multimediawidgets/player/histogramwidget.cpp b/examples/multimediawidgets/player/histogramwidget.cpp
index bb214cad5..e6ada3cde 100644
--- a/examples/multimediawidgets/player/histogramwidget.cpp
+++ b/examples/multimediawidgets/player/histogramwidget.cpp
@@ -65,7 +65,7 @@ public:
     void setLevel(qreal level);
 
 protected:
-    void paintEvent(QPaintEvent *event);
+    void paintEvent(QPaintEvent *event) override;
 
 private:
     qreal m_level = 0;