volume control

LenaPi/MusicPlayer.qml

@@ -45,7 +45,7 @@ Item{
             anchors.centerIn: parent
             height: parent.height-10
             width: height
-            source: musicModel.pCurrentItem.pImageSource
+            source: musicModel.pCoverImageSource
             fillMode: Image.PreserveAspectCrop
             layer.enabled: true
             layer.effect: OpacityMask{
@@ -64,9 +64,6 @@ Item{
             margins: container.margins
             topMargin: closeAppButton.visible ? 2*container.margins : container.margins
         }
-        from: 34 // we cannot hear anything if lower than 35%
-        to: 100
-        stepSize: 1
         value: musicModel.pAudioVolume
         onValueChanged: {
             musicModel.pAudioVolume = value;

LenaPi/VolumeSlider.qml

@@ -18,9 +18,9 @@ ColumnLayout {
         Layout.fillHeight: true
         Layout.alignment: Qt.AlignHCenter
         orientation: Qt.Vertical
-        from: 34 // we cannot hear anything if lower than 35%
+        from: 0
         to: 100
-        stepSize: 1
+        stepSize: 2
         value: 50
     }
     RoundImageButton{

LenaPi/controllers/MusicPlayer.cpp

@@ -6,11 +6,10 @@
 
 MusicPlayer::MusicPlayer(QObject *parent) : QMediaPlayer(parent)
 {
-    /* nothing */
+    // relay base class signal as NOTIFY doesn't seem to be able to handle it directly
-}
+    connect(this, &QMediaPlayer::volumeChanged, this, &MusicPlayer::audioVolumeChanged);
-
+    // init audio
-MusicPlayer::~MusicPlayer()
+    setAudioVolume(50);
-{
 }
 
 void MusicPlayer::init(NavigationItemModel *item)
@@ -19,7 +18,7 @@ void MusicPlayer::init(NavigationItemModel *item)
         return;
     }
     mCurrentItem = item;
-    emit currentItemChanged();
+    emit coverImageSourceChanged();
 
     reset();
     clearMediaList();
@@ -72,11 +71,6 @@ void MusicPlayer::playPrevious()
     }
 }
 
-NavigationItemModel *MusicPlayer::getCurrentItem()
-{
-    return mCurrentItem;
-}
-
 bool MusicPlayer::isPlaying() const
 {
     return mIsPlaying;
@@ -94,15 +88,10 @@ bool MusicPlayer::hasPrevious() const
 
 void MusicPlayer::setAudioVolume(int newVolume)
 {
-    if(newVolume != mAudioVolume){
+    if(newVolume != volume()){
-        if(newVolume > 100){
+        qDebug() << volume() << newVolume;
-            mAudioVolume = 100;
+        setVolume(newVolume);
-        } else if(newVolume < 0){
+        // signal audioVolumeChanged will be emitted automatically
-            mAudioVolume = 0;
-        } else {
-            mAudioVolume = newVolume;
-        }
-        emit audioVolumeChanged(mAudioVolume);
     }
 }
 

LenaPi/controllers/MusicPlayer.h

@@ -5,11 +5,14 @@
 #include <QMediaPlayer>
 #include <models/NavigationItemModel.h>
 
+/**
+ * @brief MusicPlayer providing interface to QML and Navigation
+ */
 class MusicPlayer : public QMediaPlayer
 {
     Q_OBJECT
 
-    Q_PROPERTY(QObject* pCurrentItem READ getCurrentItem NOTIFY currentItemChanged)
+    Q_PROPERTY(QUrl pCoverImageSource READ getCoverImageSource NOTIFY coverImageSourceChanged)
     Q_PROPERTY(bool pHasNext READ hasNext NOTIFY hasNextChanged)
     Q_PROPERTY(bool pHasPrevious READ hasPrevious NOTIFY hasPreviousChanged)
     Q_PROPERTY(bool pIsPlaying READ isPlaying NOTIFY isPlayingChanged)
@@ -21,7 +24,7 @@ class MusicPlayer : public QMediaPlayer
 
 signals:
     void navigateTo(NavigationItemModel *item);
-    void currentItemChanged();
+    void coverImageSourceChanged();
     void hasPreviousChanged();
     void hasNextChanged();
     void isPlayingChanged();
@@ -32,23 +35,37 @@ signals:
 
 public:
     MusicPlayer(QObject *parent = Q_NULLPTR);
-    ~MusicPlayer();
+    ~MusicPlayer() =default;
 
     void init(NavigationItemModel* item);
 
-    NavigationItemModel *getCurrentItem();
+    /**
+     * @brief Get path to media cover image.
+     * @return Path to media cover image.
+     */
+    inline const QString& getCoverImageSource() const {return mCurrentItem->getImageSource();}
 
 
     bool isPlaying() const;
     bool hasNext() const;
     bool hasPrevious() const;
 
-    inline int getAudioVolume() const { return mAudioVolume; }
     /**
-     * @brief Set audio volume. Information is transferred to VlcAudio
+     * @brief Get audio volume. Range is in between 0 and 100
+     * Relays info from QMediaPlayer::volume as Q_PROPERTY does seem to have
+     * trouble accessing base class functions directly.
+     */
+    inline int getAudioVolume() const { return volume(); }
+    /**
+     * @brief Set audio volume.
      * @param newVolume value between 0 and 100 (audio level in percent)
      * Ensures that volume is inbetween 0 and 100. If this range is exceeded,
      * the volume is set to the lowest and highest allowed value, respectively.
+     *
+     * Relay info to QMediaPlayer::setVolume as Q_PROPERTY does seem to have
+     * trouble accessing base class functions directly.
+     *
+     * @todo save to config file?
      */
     void setAudioVolume(int newVolume);
 
@@ -81,7 +98,6 @@ private:
     int mCurrentMediaItemLength = 0;
     int mCurrentTime = 0;
     double mCurrentMediaItemProgress = 0;
-    int mAudioVolume{50};
     QString mMediaTitle = QString("");
     NavigationItemModel* mCurrentItem = nullptr;
 };

LenaPi/main.cpp

@@ -15,9 +15,6 @@ int main(int argc, char *argv[])
     QGuiApplication app(argc, argv);
     QQmlApplicationEngine engine;
 
-    /* Add command line parser to specify a custom config file
-     * https://doc.qt.io/qt-5/qcommandlineparser.html
-     */
     QCommandLineParser parser;
     parser.setApplicationDescription("Lena's music app");
     // Define a custom config file using -c or --config

LenaPi/models/NavigationItemModel.cpp

@@ -10,12 +10,12 @@ NavigationItemModel::NavigationItemModel(QObject *parent) : QObject(parent),
     qRegisterMetaType<NavigationItemModel*>("NavigationItemModel*");
 }
 
-QString NavigationItemModel::getImageSource() const
+const QString& NavigationItemModel::getImageSource() const
 {
     return mImageSource;
 }
 
-QString NavigationItemModel::getPath() const
+const QString& NavigationItemModel::getPath() const
 {
     return mPath;
 }

LenaPi/models/NavigationItemModel.h

@@ -36,13 +36,13 @@ public:
      * represented by this item. If no such image is found, a default image is displayed
      * on the delegate.
      */
-    QString getImageSource() const;
+    const QString &getImageSource() const;
 
     /**
      * @brief Get path to folder represented by this navigation item.
      * @return Path to folder
      */
-    QString getPath() const;
+    const QString& getPath() const;
     /**
      * @brief Set folder path and set image source displayed on delegate.
      * @param path Path to directory that is represented by this navigation item.