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>

3 files changed, 4 insertions, 13 deletions

diff --git a/examples/widgets/itemviews/storageview/main.cpp b/examples/widgets/itemviews/storageview/main.cpp
index f349e58fad..8f23a4820a 100644
--- a/examples/widgets/itemviews/storageview/main.cpp
+++ b/examples/widgets/itemviews/storageview/main.cpp
@@ -49,10 +49,9 @@
 **
 ****************************************************************************/
 
-#include <QtWidgets/QApplication>
-#include <QtWidgets/QHeaderView>
-#include <QtWidgets/QShortcut>
-#include <QtWidgets/QTreeView>
+#include <QApplication>
+#include <QShortcut>
+#include <QTreeView>
 
 #include "storagemodel.h"
 
diff --git a/examples/widgets/itemviews/storageview/storagemodel.cpp b/examples/widgets/itemviews/storageview/storagemodel.cpp
index 063f126d86..b98fc8445c 100644
--- a/examples/widgets/itemviews/storageview/storagemodel.cpp
+++ b/examples/widgets/itemviews/storageview/storagemodel.cpp
@@ -53,14 +53,6 @@
 
 #include <QDir>
 #include <QLocale>
-#include <qmath.h>
-#include <algorithm>
-#include <cmath>
-
-StorageModel::StorageModel(QObject *parent) :
-    QAbstractTableModel(parent)
-{
-}
 
 void StorageModel::refresh()
 {
diff --git a/examples/widgets/itemviews/storageview/storagemodel.h b/examples/widgets/itemviews/storageview/storagemodel.h
index 787b2f04de..597218c220 100644
--- a/examples/widgets/itemviews/storageview/storagemodel.h
+++ b/examples/widgets/itemviews/storageview/storagemodel.h
@@ -74,7 +74,7 @@ public:
         ColumnCount
     };
 
-    explicit StorageModel(QObject *parent = nullptr);
+    using QAbstractTableModel::QAbstractTableModel;
 
     int columnCount(const QModelIndex &parent) const override;
     int rowCount(const QModelIndex &parent) const override;