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, 2 insertions, 8 deletions

diff --git a/examples/widgets/animation/sub-attaq/qanimationstate.h b/examples/widgets/animation/sub-attaq/qanimationstate.h
index 063b119058..24759851ba 100644
--- a/examples/widgets/animation/sub-attaq/qanimationstate.h
+++ b/examples/widgets/animation/sub-attaq/qanimationstate.h
@@ -51,13 +51,7 @@
 #ifndef QANIMATIONSTATE_H
 #define QANIMATIONSTATE_H
 
-#ifndef QT_STATEMACHINE_SOLUTION
-#  include <QtCore/qstate.h>
-#  include <QtCore/qabstractanimation.h>
-#else
-#  include "qstate.h"
-#  include "qabstractanimation.h"
-#endif
+#include <QState>
 
 QT_BEGIN_NAMESPACE
 
@@ -67,7 +61,7 @@ class QAnimationState : public QState
 {
     Q_OBJECT
 public:
-    QAnimationState(QState *parent = 0);
+    QAnimationState(QState *parent = nullptr);
     ~QAnimationState();
 
     void setAnimation(QAbstractAnimation *animation);