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 <[email protected]>
Reviewed-by: André Hartmann <[email protected]>
Reviewed-by: Friedemann Kleint <[email protected]>

1 files changed, 6 insertions, 6 deletions

diff --git a/examples/sql/sqlwidgetmapper/window.cpp b/examples/sql/sqlwidgetmapper/window.cpp
index 21ce1521691..b6946e2386a 100644
--- a/examples/sql/sqlwidgetmapper/window.cpp
+++ b/examples/sql/sqlwidgetmapper/window.cpp
@@ -87,12 +87,12 @@ Window::Window(QWidget *parent)
 //! [Set up the mapper]
 
 //! [Set up connections and layouts]
-    connect(previousButton, SIGNAL(clicked()),
-            mapper, SLOT(toPrevious()));
-    connect(nextButton, SIGNAL(clicked()),
-            mapper, SLOT(toNext()));
-    connect(mapper, SIGNAL(currentIndexChanged(int)),
-            this, SLOT(updateButtons(int)));
+    connect(previousButton, &QPushButton::clicked,
+            mapper, &QDataWidgetMapper::toPrevious);
+    connect(nextButton, &QPushButton::clicked,
+            mapper, &QDataWidgetMapper::toNext);
+    connect(mapper, &QDataWidgetMapper::currentIndexChanged,
+            this, &Window::updateButtons);
 
     QGridLayout *layout = new QGridLayout();
     layout->addWidget(nameLabel, 0, 0, 1, 1);