Revamp SQL examples to C++11

Changed signals and slots to new syntax, used nullptr and replaced
foreach with new C++11 range based for loops.
Also fixed a few minor flaws.

Task-number: QTBUG-60633
Change-Id: Ice4030133971912f96752d9d84c638c70fd73e35
Reviewed-by: Jesus Fernandez <Jesus.Fernandez@qt.io>
Reviewed-by: André Hartmann <aha_1980@gmx.de>
Reviewed-by: Friedemann Kleint <Friedemann.Kleint@qt.io>

1 files changed, 4 insertions, 4 deletions

diff --git a/examples/sql/masterdetail/dialog.h b/examples/sql/masterdetail/dialog.h
index 1789207d8d..31c4d8552c 100644
--- a/examples/sql/masterdetail/dialog.h
+++ b/examples/sql/masterdetail/dialog.h
@@ -61,7 +61,7 @@ class Dialog : public QDialog
 
 public:
     Dialog(QSqlRelationalTableModel *albums, QDomDocument details,
-           QFile *output, QWidget *parent = 0);
+           QFile *output, QWidget *parent = nullptr);
 
 private slots:
     void revert();
@@ -70,12 +70,12 @@ private slots:
 private:
     int addNewAlbum(const QString &title, int artistId);
     int addNewArtist(const QString &name);
-    void addTracks(int albumId, QStringList tracks);
+    void addTracks(int albumId, const QStringList &tracks);
     QDialogButtonBox *createButtons();
     QGroupBox *createInputWidgets();
     int findArtistId(const QString &artist);
-    int generateAlbumId();
-    int generateArtistId();
+    static int generateAlbumId();
+    static int generateArtistId();
     void increaseAlbumCount(QModelIndex artistIndex);
     QModelIndex indexOfArtist(const QString &artist);