Add explicit

src/covermanager/albumcoverchoicecontroller.h

@@ -57,7 +57,7 @@ class AlbumCoverChoiceController : public QWidget {
   static const char *kSaveImageFileFilter;
   static const char *kAllFilesFilter;
 
-  AlbumCoverChoiceController(QWidget *parent = nullptr);
+  explicit AlbumCoverChoiceController(QWidget *parent = nullptr);
   ~AlbumCoverChoiceController();
 
   void Init(Application *app);

src/covermanager/albumcoverexport.h

@@ -35,7 +35,7 @@ class AlbumCoverExport : public QDialog {
   Q_OBJECT
 
  public:
-  AlbumCoverExport(QWidget *parent = nullptr);
+  explicit AlbumCoverExport(QWidget *parent = nullptr);
   ~AlbumCoverExport();
 
   enum OverwriteMode {

src/covermanager/albumcoverfetcher.h

@@ -42,7 +42,7 @@ struct CoverSearchStatistics;
 
 // This class represents a single search-for-cover request. It identifies and describes the request.
 struct CoverSearchRequest {
-  CoverSearchRequest() : id(-1), search(false), fetchall(false) {}
+  explicit CoverSearchRequest() : id(-1), search(false), fetchall(false) {}
 
   // An unique (for one AlbumCoverFetcher) request identifier
   quint64 id;
@@ -60,7 +60,7 @@ struct CoverSearchRequest {
 
 // This structure represents a single result of some album's cover search request.
 struct CoverSearchResult {
-  CoverSearchResult() : score(0.0) {}
+  explicit CoverSearchResult() : score(0.0) {}
 
   // Used for grouping in the user interface.
   QString provider;
@@ -87,7 +87,7 @@ class AlbumCoverFetcher : public QObject {
   Q_OBJECT
 
  public:
-  AlbumCoverFetcher(CoverProviders *cover_providers, QObject *parent = nullptr, QNetworkAccessManager *network = 0);
+  explicit AlbumCoverFetcher(CoverProviders *cover_providers, QObject *parent = nullptr, QNetworkAccessManager *network = 0);
   virtual ~AlbumCoverFetcher() {}
 
   static const int kMaxConcurrentRequests;

src/covermanager/albumcoverfetchersearch.h

@@ -47,7 +47,7 @@ class AlbumCoverFetcherSearch : public QObject {
   Q_OBJECT
 
  public:
-  AlbumCoverFetcherSearch(const CoverSearchRequest &request, QNetworkAccessManager *network, QObject *parent);
+  explicit AlbumCoverFetcherSearch(const CoverSearchRequest &request, QNetworkAccessManager *network, QObject *parent);
 
   void Start(CoverProviders *cover_providers);
 

src/covermanager/albumcoverloader.h

@@ -84,7 +84,7 @@ class AlbumCoverLoader : public QObject {
   };
 
   struct Task {
-    Task() : redirects(0) {}
+    explicit Task() : redirects(0) {}
 
     AlbumCoverLoaderOptions options;
 
@@ -98,7 +98,7 @@ class AlbumCoverLoader : public QObject {
   };
 
   struct TryLoadResult {
-    TryLoadResult(bool async, bool success, const QUrl &_cover_url, const QImage &_image) : started_async(async), loaded_success(success), cover_url(_cover_url), image(_image) {}
+    explicit TryLoadResult(bool async, bool success, const QUrl &_cover_url, const QImage &_image) : started_async(async), loaded_success(success), cover_url(_cover_url), image(_image) {}
 
     bool started_async;
     bool loaded_success;

src/covermanager/albumcoverloaderoptions.h

@@ -26,7 +26,7 @@
 #include <QImage>
 
 struct AlbumCoverLoaderOptions {
-  AlbumCoverLoaderOptions()
+  explicit AlbumCoverLoaderOptions()
       : desired_height_(120),
         scale_output_image_(true),
         pad_output_image_(true) {}

src/covermanager/albumcovermanagerlist.h

@@ -36,16 +36,17 @@ class AlbumCoverManager;
 
 class AlbumCoverManagerList : public QListWidget {
   Q_OBJECT
+
  public:
-  AlbumCoverManagerList(QWidget *parent = nullptr);
+  explicit AlbumCoverManagerList(QWidget *parent = nullptr);
 
   void set_cover_manager(AlbumCoverManager *manager) { manager_ = manager; }
 
-protected:
+ protected:
   QMimeData *mimeData(const QList<QListWidgetItem*> items) const;
   void dropEvent(QDropEvent *event);
 
-private:
+ private:
   AlbumCoverManager* manager_;
 };
 

src/covermanager/albumcoversearcher.h

@@ -48,7 +48,7 @@ class Application;
 class Ui_AlbumCoverSearcher;
 
 class SizeOverlayDelegate : public QStyledItemDelegate {
-public:
+ public:
   static const int kMargin;
   static const int kPaddingX;
   static const int kPaddingY;
@@ -57,7 +57,7 @@ public:
   static const int kBorderAlpha;
   static const int kBackgroundAlpha;
 
-  SizeOverlayDelegate(QObject *parent = nullptr);
+  explicit SizeOverlayDelegate(QObject *parent = nullptr);
 
   void paint(QPainter *painter, const QStyleOptionViewItem &option, const QModelIndex &index) const;
 };
@@ -66,8 +66,8 @@ public:
 class AlbumCoverSearcher : public QDialog {
   Q_OBJECT
 
-public:
-  AlbumCoverSearcher(const QIcon &no_cover_icon, Application *app, QWidget *parent);
+ public:
+  explicit AlbumCoverSearcher(const QIcon &no_cover_icon, Application *app, QWidget *parent);
   ~AlbumCoverSearcher();
 
   enum Role {
@@ -82,17 +82,17 @@ public:
 
   QImage Exec(const QString &artist, const QString &album);
 
-protected:
+ protected:
   void keyPressEvent(QKeyEvent*);
 
-private slots:
+ private slots:
   void Search();
   void SearchFinished(const quint64 id, const CoverSearchResults &results);
   void ImageLoaded(const quint64 id, const QUrl &cover_url, const QImage &image);
 
   void CoverDoubleClicked(const QModelIndex &index);
 
-private:
+ private:
   Ui_AlbumCoverSearcher *ui_;
 
   Application *app_;

src/covermanager/coverexportrunnable.h

@@ -34,7 +34,7 @@ class CoverExportRunnable : public QObject, public QRunnable {
   Q_OBJECT
 
  public:
-  CoverExportRunnable(const AlbumCoverExport::DialogResult &dialog_result, const Song &song);
+  explicit CoverExportRunnable(const AlbumCoverExport::DialogResult &dialog_result, const Song &song);
   virtual ~CoverExportRunnable() {}
 
   void run();

src/covermanager/coverfromurldialog.h

@@ -38,7 +38,7 @@ class CoverFromURLDialog : public QDialog {
   Q_OBJECT
 
  public:
-  CoverFromURLDialog(QWidget *parent = nullptr);
+  explicit CoverFromURLDialog(QWidget *parent = nullptr);
   ~CoverFromURLDialog();
 
   // Opens the dialog. This returns an image found at the URL chosen by user or null image if the dialog got rejected.

src/covermanager/coversearchstatistics.h

@@ -30,7 +30,7 @@
 
 struct CoverSearchStatistics {
 
-  CoverSearchStatistics();
+  explicit CoverSearchStatistics();
 
   CoverSearchStatistics& operator +=(const CoverSearchStatistics &other);
 

src/covermanager/discogscoverprovider.h

@@ -42,7 +42,7 @@ class Application;
 
 // This struct represents a single search-for-cover request. It identifies and describes the request.
 struct DiscogsCoverSearchContext {
-  DiscogsCoverSearchContext() : id(-1), r_count(0) {}
+  explicit DiscogsCoverSearchContext() : id(-1), r_count(0) {}
 
   // The unique request identifier
   int id;
@@ -58,7 +58,7 @@ Q_DECLARE_METATYPE(DiscogsCoverSearchContext)
 
 // This struct represents a single release request. It identifies and describes the request.
 struct DiscogsCoverReleaseContext {
-  DiscogsCoverReleaseContext() : id(-1) {}
+  explicit DiscogsCoverReleaseContext() : id(-1) {}
 
   int id;			// The unique request identifier
   int s_id;			// The search request identifier