Cleanup QtWidgets animation examples

Cleanup the QtWidgets animation examples:
 - use nullptr
 - use normalized includes, remove unused includes
 - fix style
 - fix crash of sub-attaq when the game ended (error during range-based
   for loop porting)
 - don't use keyword 'final' for a variable name

Change-Id: Id23be8ff8b1b310da005d13c052fe547f6a0d63a
Reviewed-by: Friedemann Kleint <Friedemann.Kleint@qt.io>

1 files changed, 3 insertions, 4 deletions

diff --git a/examples/widgets/animation/sub-attaq/mainwindow.cpp b/examples/widgets/animation/sub-attaq/mainwindow.cpp
index a4bb15b383..8f545ecebd 100644
--- a/examples/widgets/animation/sub-attaq/mainwindow.cpp
+++ b/examples/widgets/animation/sub-attaq/mainwindow.cpp
@@ -56,11 +56,10 @@
 #include <QGraphicsView>
 #include <QApplication>
 #include <QMenu>
-#include <QMenuBar>
 #include <QLayout>
 
 #ifndef QT_NO_OPENGL
-# include <QtOpenGL/QtOpenGL>
+# include <QtOpenGL>
 #endif
 
 MainWindow::MainWindow(QWidget *parent)
@@ -74,10 +73,10 @@ MainWindow::MainWindow(QWidget *parent)
     quitAction->setShortcut(QKeySequence(Qt::CTRL | Qt::Key_Q));
 
     if (QApplication::arguments().contains("-fullscreen")) {
-        scene = new GraphicsScene(0, 0, 750, 400, GraphicsScene::Small);
+        scene = new GraphicsScene(0, 0, 750, 400, GraphicsScene::Small, this);
         setWindowState(Qt::WindowFullScreen);
     } else {
-        scene = new GraphicsScene(0, 0, 880, 630);
+        scene = new GraphicsScene(0, 0, 880, 630, GraphicsScene::Big, this);
         layout()->setSizeConstraint(QLayout::SetFixedSize);
     }