QtWidgets documentation: cleanup

Cleanup the QtWidgets documentation:
 - use new signal/slot syntax
 - use range-based for loop instead foreach

Change-Id: I621b1ddac108d3df676209241d93d9b4f04a25fe
Reviewed-by: Friedemann Kleint <Friedemann.Kleint@qt.io>

1 files changed, 2 insertions, 2 deletions

diff --git a/src/widgets/doc/snippets/qlistwidget-dnd/mainwindow.cpp b/src/widgets/doc/snippets/qlistwidget-dnd/mainwindow.cpp
index 1153250b17..70df2b112e 100644
--- a/src/widgets/doc/snippets/qlistwidget-dnd/mainwindow.cpp
+++ b/src/widgets/doc/snippets/qlistwidget-dnd/mainwindow.cpp
@@ -48,7 +48,7 @@
 **
 ****************************************************************************/
 
-#include <QtGui>
+#include <QtWidgets>
 
 #include "mainwindow.h"
 
@@ -74,7 +74,7 @@ listWidget->setDragDropMode(QAbstractItemView::InternalMove);
 
     this->listWidget = listWidget;
 
-    connect(quitAction, SIGNAL(triggered()), this, SLOT(close()));
+    connect(quitAction, &QAction::triggered, this, &QWidget::close);
 
     setupListItems();