Playlist: add newly-added columns

Still mostly boilter-plate-y. It is somewhat interesting to see that info
in playlist view, so add the two fileds as columns.

At least for Integrated loudness, since it's normally negative,
we need to add a specialized Delegate.

src/playlist/playlist.cpp

@@ -323,6 +323,10 @@ QVariant Playlist::data(const QModelIndex &idx, int role) const {
           if (role == Qt::DisplayRole)  return song.comment().simplified();
           return song.comment();
 
+        case Column_EBUR128IntegratedLoudness: return song.ebur128_integrated_loudness_lufs() ? *song.ebur128_integrated_loudness_lufs() : QVariant();
+
+        case Column_EBUR128LoudnessRange: return song.ebur128_loudness_range_lu() ? *song.ebur128_loudness_range_lu() : QVariant();
+
         case Column_Source:             return QVariant::fromValue(song.source());
 
         case Column_Rating:             return song.rating();
@@ -1325,6 +1329,9 @@ bool Playlist::CompareItems(const int column, const Qt::SortOrder order, std::sh
 
     case Column_HasCUE:       cmp(has_cue);
 
+    case Column_EBUR128IntegratedLoudness: cmp(ebur128_integrated_loudness_lufs);
+    case Column_EBUR128LoudnessRange: cmp(ebur128_loudness_range_lu);
+
     default: qLog(Error) << "No such column" << column;
   }
 
@@ -1384,6 +1391,10 @@ QString Playlist::column_name(Column column) {
     case Column_Mood:         return tr("Mood");
     case Column_Rating:       return tr("Rating");
     case Column_HasCUE:       return tr("CUE");
+
+    case Column_EBUR128IntegratedLoudness: return tr("Integrated loudness");
+    case Column_EBUR128LoudnessRange: return tr("Loudness range");
+
     default:                  qLog(Error) << "No such column" << column;;
   }
   return "";

src/playlist/playlist.h

@@ -131,6 +131,8 @@ class Playlist : public QAbstractListModel {
     Column_Mood,
     Column_Rating,
     Column_HasCUE,
+    Column_EBUR128IntegratedLoudness,
+    Column_EBUR128LoudnessRange,
     ColumnCount
   };
 

src/playlist/playlistdelegates.cpp

@@ -540,3 +540,23 @@ QString RatingItemDelegate::displayText(const QVariant &value, const QLocale&) c
   return QString::number(rating, 'f', 1);
 
 }
+
+QString Ebur128LoudnessLUFSItemDelegate::displayText(const QVariant &value, const QLocale&) const {
+
+  bool ok = false;
+  double v = value.toDouble(&ok);
+
+  if (ok) return Song::Ebur128LoudnessLUFSToText(v);
+  return QString();
+
+}
+
+QString Ebur128LoudnessRangeLUItemDelegate::displayText(const QVariant &value, const QLocale&) const {
+
+  bool ok = false;
+  double v = value.toDouble(&ok);
+
+  if (ok) return Song::Ebur128LoudnessRangeLUToText(v);
+  return QString();
+
+}

src/playlist/playlistdelegates.h

@@ -231,4 +231,20 @@ class RatingItemDelegate : public PlaylistDelegateBase {
   QModelIndexList selected_indexes_;
 };
 
+class Ebur128LoudnessLUFSItemDelegate : public PlaylistDelegateBase {
+  Q_OBJECT
+
+ public:
+  explicit Ebur128LoudnessLUFSItemDelegate(QObject *parent) : PlaylistDelegateBase(parent) {}
+  QString displayText(const QVariant &value, const QLocale &locale) const override;
+};
+
+class Ebur128LoudnessRangeLUItemDelegate : public PlaylistDelegateBase {
+  Q_OBJECT
+
+ public:
+  explicit Ebur128LoudnessRangeLUItemDelegate(QObject *parent) : PlaylistDelegateBase(parent) {}
+  QString displayText(const QVariant &value, const QLocale &locale) const override;
+};
+
 #endif  // PLAYLISTDELEGATES_H

src/playlist/playlistview.cpp

@@ -274,6 +274,8 @@ void PlaylistView::SetItemDelegates() {
   rating_delegate_ = new RatingItemDelegate(this);
   setItemDelegateForColumn(Playlist::Column_Rating, rating_delegate_);
 
+  setItemDelegateForColumn(Playlist::Column_EBUR128IntegratedLoudness, new Ebur128LoudnessLUFSItemDelegate(this));
+  setItemDelegateForColumn(Playlist::Column_EBUR128LoudnessRange, new Ebur128LoudnessRangeLUItemDelegate(this));
 }
 
 void PlaylistView::setModel(QAbstractItemModel *m) {
@@ -391,6 +393,8 @@ void PlaylistView::RestoreHeaderState() {
     header_->HideSection(Playlist::Column_Mood);
     header_->HideSection(Playlist::Column_Rating);
     header_->HideSection(Playlist::Column_HasCUE);
+    header_->HideSection(Playlist::Column_EBUR128IntegratedLoudness);
+    header_->HideSection(Playlist::Column_EBUR128LoudnessRange);
 
     header_->moveSection(header_->visualIndex(Playlist::Column_Track), 0);