1 /****************************************************************************

     2 **

     3 ** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).

     4 ** All rights reserved.

     5 ** Contact: Nokia Corporation (qt-info@nokia.com)

     6 **

     7 ** This file is part of the examples of the Qt Toolkit.

     8 **

     9 ** $QT_BEGIN_LICENSE:LGPL$

    10 ** No Commercial Usage

    11 ** This file contains pre-release code and may not be distributed.

    12 ** You may use this file in accordance with the terms and conditions

    13 ** contained in the Technology Preview License Agreement accompanying

    14 ** this package.

    15 **

    16 ** GNU Lesser General Public License Usage

    17 ** Alternatively, this file may be used under the terms of the GNU Lesser

    18 ** General Public License version 2.1 as published by the Free Software

    19 ** Foundation and appearing in the file LICENSE.LGPL included in the

    20 ** packaging of this file.  Please review the following information to

    21 ** ensure the GNU Lesser General Public License version 2.1 requirements

    22 ** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.

    23 **

    24 ** In addition, as a special exception, Nokia gives you certain additional

    25 ** rights.  These rights are described in the Nokia Qt LGPL Exception

    26 ** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.

    27 **

    28 ** If you have questions regarding the use of this file, please contact

    29 ** Nokia at qt-info@nokia.com.

    30 **

    31 **

    32 **

    33 **

    34 **

    35 **

    36 **

    37 **

    38 ** $QT_END_LICENSE$

    39 **

    40 ****************************************************************************/

    41 

    42 #include <QtGui>

    43 #include <QtNetwork>

    44 

    45 #include "blockingclient.h"

    46 

    47 BlockingClient::BlockingClient(QWidget *parent)

    48     : QDialog(parent)

    49 {

    50     hostLabel = new QLabel(tr("&Server name:"));

    51     portLabel = new QLabel(tr("S&erver port:"));

    52 

    53     // find out which IP to connect to

    54     QString ipAddress;

    55     QList<QHostAddress> ipAddressesList = QNetworkInterface::allAddresses();

    56     // use the first non-localhost IPv4 address

    57     for (int i = 0; i < ipAddressesList.size(); ++i) {

    58         if (ipAddressesList.at(i) != QHostAddress::LocalHost &&

    59             ipAddressesList.at(i).toIPv4Address()) {

    60             ipAddress = ipAddressesList.at(i).toString();

    61             break;

    62         }

    63     }

    64     // if we did not find one, use IPv4 localhost

    65     if (ipAddress.isEmpty())

    66         ipAddress = QHostAddress(QHostAddress::LocalHost).toString();

    67 

    68     hostLineEdit = new QLineEdit(ipAddress);

    69     portLineEdit = new QLineEdit;

    70     portLineEdit->setValidator(new QIntValidator(1, 65535, this));

    71 

    72     hostLabel->setBuddy(hostLineEdit);

    73     portLabel->setBuddy(portLineEdit);

    74 

    75     statusLabel = new QLabel(tr("This examples requires that you run the "

    76                                 "Fortune Server example as well."));

    77 

    78     getFortuneButton = new QPushButton(tr("Get Fortune"));

    79     getFortuneButton->setDefault(true);

    80     getFortuneButton->setEnabled(false);

    81 

    82     quitButton = new QPushButton(tr("Quit"));

    83 

    84     buttonBox = new QDialogButtonBox;

    85     buttonBox->addButton(getFortuneButton, QDialogButtonBox::ActionRole);

    86     buttonBox->addButton(quitButton, QDialogButtonBox::RejectRole);

    87 

    88     connect(hostLineEdit, SIGNAL(textChanged(QString)),

    89             this, SLOT(enableGetFortuneButton()));

    90     connect(portLineEdit, SIGNAL(textChanged(QString)),

    91             this, SLOT(enableGetFortuneButton()));

    92     connect(getFortuneButton, SIGNAL(clicked()),

    93             this, SLOT(requestNewFortune()));

    94     connect(quitButton, SIGNAL(clicked()), this, SLOT(close()));

    95 //! [0]

    96     connect(&thread, SIGNAL(newFortune(QString)),

    97             this, SLOT(showFortune(QString)));

    98 //! [0] //! [1]

    99     connect(&thread, SIGNAL(error(int,QString)),

   100             this, SLOT(displayError(int,QString)));

   101 //! [1]

   102 

   103     QGridLayout *mainLayout = new QGridLayout;

   104     mainLayout->addWidget(hostLabel, 0, 0);

   105     mainLayout->addWidget(hostLineEdit, 0, 1);

   106     mainLayout->addWidget(portLabel, 1, 0);

   107     mainLayout->addWidget(portLineEdit, 1, 1);

   108     mainLayout->addWidget(statusLabel, 2, 0, 1, 2);

   109     mainLayout->addWidget(buttonBox, 3, 0, 1, 2);

   110     setLayout(mainLayout);

   111 

   112     setWindowTitle(tr("Blocking Fortune Client"));

   113     portLineEdit->setFocus();

   114 }

   115 

   116 //! [2]

   117 void BlockingClient::requestNewFortune()

   118 {

   119     getFortuneButton->setEnabled(false);

   120     thread.requestNewFortune(hostLineEdit->text(),

   121                              portLineEdit->text().toInt());

   122 }

   123 //! [2]

   124 

   125 //! [3]

   126 void BlockingClient::showFortune(const QString &nextFortune)

   127 {

   128     if (nextFortune == currentFortune) {

   129         requestNewFortune();

   130         return;

   131     }

   132 //! [3]

   133 

   134 //! [4]

   135     currentFortune = nextFortune;

   136     statusLabel->setText(currentFortune);

   137     getFortuneButton->setEnabled(true);

   138 }

   139 //! [4]

   140 

   141 void BlockingClient::displayError(int socketError, const QString &message)

   142 {

   143     switch (socketError) {

   144     case QAbstractSocket::HostNotFoundError:

   145         QMessageBox::information(this, tr("Blocking Fortune Client"),

   146                                  tr("The host was not found. Please check the "

   147                                     "host and port settings."));

   148         break;

   149     case QAbstractSocket::ConnectionRefusedError:

   150         QMessageBox::information(this, tr("Blocking Fortune Client"),

   151                                  tr("The connection was refused by the peer. "

   152                                     "Make sure the fortune server is running, "

   153                                     "and check that the host name and port "

   154                                     "settings are correct."));

   155         break;

   156     default:

   157         QMessageBox::information(this, tr("Blocking Fortune Client"),

   158                                  tr("The following error occurred: %1.")

   159                                  .arg(message));

   160     }

   161 

   162     getFortuneButton->setEnabled(true);

   163 }

   164 

   165 void BlockingClient::enableGetFortuneButton()

   166 {

   167     getFortuneButton->setEnabled(!hostLineEdit->text().isEmpty()

   168                                  && !portLineEdit->text().isEmpty());

   169 }