Use anonymous namespace instead of static for constants

src/covermanager/albumcoverexporter.cpp

@@ -29,7 +29,9 @@
 #include "albumcoverexporter.h"
 #include "coverexportrunnable.h"
 
-const int AlbumCoverExporter::kMaxConcurrentRequests = 3;
+namespace {
+constexpr int kMaxConcurrentRequests = 3;
+}
 
 AlbumCoverExporter::AlbumCoverExporter(QObject *parent)
     : QObject(parent),

src/covermanager/albumcoverexporter.h

@@ -40,8 +40,6 @@ class AlbumCoverExporter : public QObject {
  public:
   explicit AlbumCoverExporter(QObject *parent = nullptr);
 
-  static const int kMaxConcurrentRequests;
-
   void SetDialogResult(const AlbumCoverExport::DialogResult &dialog_result);
   void SetCoverTypes(const AlbumCoverLoaderOptions::Types &cover_types);
   void AddExportRequest(const Song &song);

src/covermanager/albumcoverfetcher.cpp

@@ -36,7 +36,9 @@
 
 using namespace std::chrono_literals;
 
-const int AlbumCoverFetcher::kMaxConcurrentRequests = 5;
+namespace {
+constexpr int kMaxConcurrentRequests = 5;
+}
 
 AlbumCoverFetcher::AlbumCoverFetcher(SharedPtr<CoverProviders> cover_providers, SharedPtr<NetworkAccessManager> network, QObject *parent)
     : QObject(parent),

src/covermanager/albumcoverfetcher.h

@@ -112,8 +112,6 @@ class AlbumCoverFetcher : public QObject {
   explicit AlbumCoverFetcher(SharedPtr<CoverProviders> cover_providers, SharedPtr<NetworkAccessManager> network, QObject *parent = nullptr);
   ~AlbumCoverFetcher() override;
 
-  static const int kMaxConcurrentRequests;
-
   quint64 SearchForCovers(const QString &artist, const QString &album, const QString &title = QString());
   quint64 FetchAlbumCover(const QString &artist, const QString &album, const QString &title, const bool batch);
 

src/covermanager/albumcoverfetchersearch.cpp

@@ -47,10 +47,12 @@
 #include "coverproviders.h"
 #include "albumcoverimageresult.h"
 
-const int AlbumCoverFetcherSearch::kSearchTimeoutMs = 20000;
-const int AlbumCoverFetcherSearch::kImageLoadTimeoutMs = 6000;
-const int AlbumCoverFetcherSearch::kTargetSize = 500;
-const float AlbumCoverFetcherSearch::kGoodScore = 4.0;
+namespace {
+constexpr int kSearchTimeoutMs = 20000;
+constexpr int kImageLoadTimeoutMs = 6000;
+constexpr int kTargetSize = 500;
+constexpr float kGoodScore = 4.0;
+}  // namespace
 
 AlbumCoverFetcherSearch::AlbumCoverFetcherSearch(const CoverSearchRequest &request, SharedPtr<NetworkAccessManager> network, QObject *parent)
     : QObject(parent),

src/covermanager/albumcoverfetchersearch.h

@@ -90,11 +90,6 @@ class AlbumCoverFetcherSearch : public QObject {
   static bool CoverProviderSearchResultCompareScore(const CoverProviderSearchResult &a, const CoverProviderSearchResult &b);
 
  private:
-  static const int kSearchTimeoutMs;
-  static const int kImageLoadTimeoutMs;
-  static const int kTargetSize;
-  static const float kGoodScore;
-
   CoverSearchStatistics statistics_;
 
   // Search request encapsulated by this AlbumCoverFetcherSearch.

src/covermanager/albumcovermanager.cpp

@@ -95,8 +95,10 @@
 
 #include "ui_albumcovermanager.h"
 
-const char *AlbumCoverManager::kSettingsGroup = "CoverManager";
-constexpr int AlbumCoverManager::kThumbnailSize = 120;
+namespace {
+constexpr char kSettingsGroup[] = "CoverManager";
+constexpr int kThumbnailSize = 120;
+}
 
 AlbumCoverManager::AlbumCoverManager(Application *app, SharedPtr<CollectionBackend> collection_backend, QMainWindow *mainwindow, QWidget *parent)
     : QMainWindow(parent),

src/covermanager/albumcovermanager.h

@@ -185,9 +185,6 @@ class AlbumCoverManager : public QMainWindow {
   void SaveEmbeddedCoverFinished(TagReaderReply *reply, AlbumItem *album_item, const QUrl &url, const bool art_embedded);
 
  private:
-  static const char *kSettingsGroup;
-  static const int kThumbnailSize;
-
   Ui_CoverManager *ui_;
   QMainWindow *mainwindow_;
   Application *app_;

src/covermanager/albumcoversearcher.cpp

@@ -62,13 +62,15 @@
 #include "albumcoverimageresult.h"
 #include "ui_albumcoversearcher.h"
 
-const int SizeOverlayDelegate::kMargin = 4;
-const int SizeOverlayDelegate::kPaddingX = 3;
-const int SizeOverlayDelegate::kPaddingY = 1;
-const qreal SizeOverlayDelegate::kBorder = 5.0;
-const qreal SizeOverlayDelegate::kFontPointSize = 7.5;
-const int SizeOverlayDelegate::kBorderAlpha = 200;
-const int SizeOverlayDelegate::kBackgroundAlpha = 175;
+namespace {
+constexpr int kMargin = 4;
+constexpr int kPaddingX = 3;
+constexpr int kPaddingY = 1;
+constexpr qreal kBorder = 5.0;
+constexpr qreal kFontPointSize = 7.5;
+constexpr int kBorderAlpha = 200;
+constexpr int kBackgroundAlpha = 175;
+}  // namespace
 
 SizeOverlayDelegate::SizeOverlayDelegate(QObject *parent)
     : QStyledItemDelegate(parent) {}

src/covermanager/albumcoversearcher.h

@@ -55,14 +55,6 @@ class SizeOverlayDelegate : public QStyledItemDelegate {
   Q_OBJECT
 
  public:
-  static const int kMargin;
-  static const int kPaddingX;
-  static const int kPaddingY;
-  static const qreal kBorder;
-  static const qreal kFontPointSize;
-  static const int kBorderAlpha;
-  static const int kBackgroundAlpha;
-
   explicit SizeOverlayDelegate(QObject *parent = nullptr);
 
   void paint(QPainter *painter, const QStyleOptionViewItem &option, const QModelIndex &idx) const override;