QtNetwork (examples) - update multicastreceiver example

... as soon as we updated multicastsender. Changes are minimal and mostly
cosmetic - use 'explcit' and 'nullptr' where appropriate, make a socket
data-member and not a pointer, move the 'datagram's declaration outside
of a loop.

Task-number: QTBUG-60628
Change-Id: Icfa46e6d2844c40a605f2f4066847594943a8ea8
Reviewed-by: Mårten Nordheim <marten.nordheim@qt.io>
Reviewed-by: Edward Welbourne <edward.welbourne@qt.io>

1 files changed, 5 insertions, 7 deletions

diff --git a/examples/network/multicastreceiver/receiver.h b/examples/network/multicastreceiver/receiver.h
index efef1cdb30..54927fdd63 100644
--- a/examples/network/multicastreceiver/receiver.h
+++ b/examples/network/multicastreceiver/receiver.h
@@ -1,6 +1,6 @@
 /****************************************************************************
 **
-** Copyright (C) 2016 The Qt Company Ltd.
+** Copyright (C) 2017 The Qt Company Ltd.
 ** Contact: https://www.qt.io/licensing/
 **
 ** This file is part of the examples of the Qt Toolkit.
@@ -53,11 +53,10 @@
 
 #include <QDialog>
 #include <QHostAddress>
+#include <QUdpSocket>
 
 QT_BEGIN_NAMESPACE
 class QLabel;
-class QPushButton;
-class QUdpSocket;
 QT_END_NAMESPACE
 
 class Receiver : public QDialog
@@ -65,15 +64,14 @@ class Receiver : public QDialog
     Q_OBJECT
 
 public:
-    Receiver(QWidget *parent = 0);
+    explicit Receiver(QWidget *parent = nullptr);
 
 private slots:
     void processPendingDatagrams();
 
 private:
-    QLabel *statusLabel;
-    QPushButton *quitButton;
-    QUdpSocket *udpSocket;
+    QLabel *statusLabel = nullptr;
+    QUdpSocket udpSocket;
     QHostAddress groupAddress;
 };