Network chat: update includes

Prefer own headers, avoid full-module includes

Task-number: QTBUG-108873
Change-Id: I4282d4aab5fd66c64fc27cd130b223d33069d80f
Reviewed-by: Konrad Kujawa <konrad.kujawa@qt.io>
Reviewed-by: Timur Pocheptsov <timur.pocheptsov@qt.io>

examples/network/network-chat/chatdialog.cpp

@@ -1,10 +1,14 @@
 // Copyright (C) 2016 The Qt Company Ltd.
 // SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
 
-#include <QtWidgets>
-
 #include "chatdialog.h"
 
+#include <QTimer>
+#include <QScrollBar>
+#include <QLineEdit>
+#include <QTextTable>
+#include <QMessageBox>
+
 ChatDialog::ChatDialog(QWidget *parent)
     : QDialog(parent)
 {

examples/network/network-chat/client.cpp

@@ -1,12 +1,12 @@
 // Copyright (C) 2016 The Qt Company Ltd.
 // SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
 
-#include <QtNetwork>
-
 #include "client.h"
 #include "connection.h"
 #include "peermanager.h"
 
+#include <QHostInfo>
+
 Client::Client()
 {
     peerManager = new PeerManager(this);

examples/network/network-chat/client.h

@@ -4,12 +4,12 @@
 #ifndef CLIENT_H
 #define CLIENT_H
 
+#include "server.h"
+
 #include <QAbstractSocket>
 #include <QHash>
 #include <QHostAddress>
 
-#include "server.h"
-
 class PeerManager;
 
 class Client : public QObject

examples/network/network-chat/connection.cpp

@@ -4,7 +4,7 @@
 
 #include "connection.h"
 
-#include <QtNetwork>
+#include <QTimerEvent>
 
 static const int TransferTimeout = 30 * 1000;
 static const int PongTimeout = 60 * 1000;

examples/network/network-chat/main.cpp

@@ -1,11 +1,9 @@
 // Copyright (C) 2016 The Qt Company Ltd.
 // SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
 
-#include <QApplication>
-
 #include "chatdialog.h"
 
-#include <QtCore/QSettings>
+#include <QtWidgets/QApplication>
 
 int main(int argc, char *argv[])
 {

examples/network/network-chat/peermanager.cpp

@@ -2,12 +2,12 @@
 // Copyright (C) 2018 Intel Corporation.
 // SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
 
-#include <QtNetwork>
-
 #include "client.h"
 #include "connection.h"
 #include "peermanager.h"
 
+#include <QNetworkInterface>
+
 static const qint32 BroadcastInterval = 2000;
 static const unsigned broadcastPort = 45000;
 

examples/network/network-chat/server.cpp

@@ -1,8 +1,6 @@
 // Copyright (C) 2016 The Qt Company Ltd.
 // SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
 
-#include <QtNetwork>
-
 #include "connection.h"
 #include "server.h"