Polish the model/view tutorial examples

- Reorder the class declarations, moving private sections last
- Make constructors explicit
- Add space to the comments
- Introduce auto
- Replace slot MainWindow::showWindowTitle() by a direct
  connection to slot QWidget::setWindowTitle().

Pick-to: 6.4 6.3
Change-Id: Ic229162434dfef5f2767d0b4e186759ca0f821f3
Reviewed-by: Richard Moe Gustavsen <richard.gustavsen@qt.io>

1 files changed, 2 insertions, 1 deletions

diff --git a/examples/widgets/tutorials/modelview/1_readonly/mymodel.h b/examples/widgets/tutorials/modelview/1_readonly/mymodel.h
index ec2833fa08..ab26790a03 100644
--- a/examples/widgets/tutorials/modelview/1_readonly/mymodel.h
+++ b/examples/widgets/tutorials/modelview/1_readonly/mymodel.h
@@ -12,7 +12,8 @@ class MyModel : public QAbstractTableModel
 {
     Q_OBJECT
 public:
-    MyModel(QObject *parent = nullptr);
+    explicit MyModel(QObject *parent = nullptr);
+
     int rowCount(const QModelIndex &parent = QModelIndex()) const override;
     int columnCount(const QModelIndex &parent = QModelIndex()) const override;
     QVariant data(const QModelIndex &index, int role = Qt::DisplayRole) const override;