Cleanup Itemviews examples

Cleanup the Itemviews examples
 - use nullptr instead 0
 - use for loop instead foreach
 - include own header first
 - remove uselss includes

Change-Id: I32e9f64356e42038707d063dcad977239ce1fe9e
Reviewed-by: Luca Beldi <v.ronin@yahoo.it>
Reviewed-by: Sze Howe Koh <szehowe.koh@gmail.com>

1 files changed, 2 insertions, 2 deletions

diff --git a/examples/widgets/itemviews/coloreditorfactory/colorlisteditor.h b/examples/widgets/itemviews/coloreditorfactory/colorlisteditor.h
index f284c07c89..f9d736d298 100644
--- a/examples/widgets/itemviews/coloreditorfactory/colorlisteditor.h
+++ b/examples/widgets/itemviews/coloreditorfactory/colorlisteditor.h
@@ -65,11 +65,11 @@ class ColorListEditor : public QComboBox
     Q_PROPERTY(QColor color READ color WRITE setColor USER true)
 
 public:
-    ColorListEditor(QWidget *widget = 0);
+    ColorListEditor(QWidget *widget = nullptr);
 
 public:
     QColor color() const;
-    void setColor(QColor c);
+    void setColor(const QColor &color);
 
 private:
     void populateList();