Examples: Do not wrap custom types in Qt namespace

The Qt namespace should be used for types defined in the Qt library,
not for user types.

Change-Id: I6df0ca054888f4a65b19a9cb44324321d1dcfad8
Reviewed-by: Qt CI Bot <qt_ci_bot@qt-project.org>
Reviewed-by: Timur Pocheptsov <timur.pocheptsov@qt.io>
(cherry picked from commit 25c67c608a7a6e8673eee27a105b11d723f9a9b1)
Reviewed-by: Qt Cherry-pick Bot <cherrypick_bot@qt-project.org>

examples/network/secureudpclient/addressdialog.h

@@ -6,17 +6,11 @@
 #include <QDialog>
 
 QT_BEGIN_NAMESPACE
-
 namespace Ui {
-
 class AddressDialog;
-
 }
-
 QT_END_NAMESPACE
 
-QT_USE_NAMESPACE
-
 class AddressDialog : public QDialog
 {
     Q_OBJECT

examples/network/secureudpclient/association.cpp

@@ -3,8 +3,6 @@
 
 #include "association.h"
 
-QT_BEGIN_NAMESPACE
-
 DtlsAssociation::DtlsAssociation(const QHostAddress &address, quint16 port,
                                  const QString &connectionName)
     : name(connectionName),
@@ -151,5 +149,3 @@ void DtlsAssociation::pingTimeout()
     ++ping;
 }
 //! [10]
-
-QT_END_NAMESPACE

examples/network/secureudpclient/association.h

@@ -6,8 +6,6 @@
 #include <QtNetwork>
 #include <QtCore>
 
-QT_BEGIN_NAMESPACE
-
 //! [0]
 class DtlsAssociation : public QObject
 {
@@ -45,6 +43,4 @@ private:
 };
 //! [0]
 
-QT_END_NAMESPACE
-
 #endif // ASSOCIATION_H

examples/network/secureudpclient/main.cpp

@@ -7,8 +7,6 @@
 
 int main(int argc, char *argv[])
 {
-    QT_USE_NAMESPACE
-
     QApplication app(argc, argv);
     MainWindow window;
     window.show();

examples/network/secureudpclient/mainwindow.h

@@ -8,21 +8,15 @@
 #include <QList>
 
 QT_BEGIN_NAMESPACE
-
 namespace Ui {
-
 class MainWindow;
-
 }
 
 class QHostAddress;
 class QHostInfo;
-
-class DtlsAssociation;
-
 QT_END_NAMESPACE
 
-QT_USE_NAMESPACE
+class DtlsAssociation;
 
 class MainWindow : public QMainWindow
 {

examples/network/secureudpserver/main.cpp

@@ -7,8 +7,6 @@
 
 int main(int argc, char *argv[])
 {
-    QT_USE_NAMESPACE
-
     QApplication a(argc, argv);
     MainWindow w;
     w.show();

examples/network/secureudpserver/mainwindow.h

@@ -8,15 +8,11 @@
 #include <QMainWindow>
 
 QT_BEGIN_NAMESPACE
-
 namespace Ui {
 class MainWindow;
 }
-
 QT_END_NAMESPACE
 
-QT_USE_NAMESPACE
-
 class MainWindow : public QMainWindow
 {
     Q_OBJECT

examples/network/secureudpserver/nicselector.h

@@ -9,15 +9,11 @@
 #include <QList>
 
 QT_BEGIN_NAMESPACE
-
 namespace Ui {
 class NicSelector;
 }
-
 QT_END_NAMESPACE
 
-QT_USE_NAMESPACE
-
 class NicSelector : public QDialog
 {
     Q_OBJECT

examples/network/secureudpserver/server.cpp

@@ -5,8 +5,6 @@
 
 #include <algorithm>
 
-QT_BEGIN_NAMESPACE
-
 namespace {
 
 QString peer_info(const QHostAddress &address, quint16 port)
@@ -219,5 +217,3 @@ void DtlsServer::shutdown()
     serverSocket.close();
 }
 //! [14]
-
-QT_END_NAMESPACE

examples/network/secureudpserver/server.h

@@ -9,8 +9,6 @@
 #include <vector>
 #include <memory>
 
-QT_BEGIN_NAMESPACE
-
 //! [0]
 class DtlsServer : public QObject
 {
@@ -55,6 +53,4 @@ private:
 };
 //! [0]
 
-QT_END_NAMESPACE
-
 #endif // SERVER_H