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, 4 insertions, 4 deletions

diff --git a/examples/widgets/animation/sub-attaq/progressitem.h b/examples/widgets/animation/sub-attaq/progressitem.h
index 23f5407978..f76b168151 100644
--- a/examples/widgets/animation/sub-attaq/progressitem.h
+++ b/examples/widgets/animation/sub-attaq/progressitem.h
@@ -52,19 +52,19 @@
 #define PROGRESSITEM_H
 
 //Qt
-#include <QtWidgets/QGraphicsTextItem>
+#include <QGraphicsTextItem>
 
 class ProgressItem : public QGraphicsTextItem
 {
 public:
-    ProgressItem(QGraphicsItem * parent = 0);
+    ProgressItem(QGraphicsItem *parent = nullptr);
     void setLevel(int level);
     void setScore(int score);
 
 private:
     void updateProgress();
-    int currentLevel;
-    int currentScore;
+    int currentLevel = 1;
+    int currentScore = 0;
 };
 
 #endif // PROGRESSITEM_H