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    41 

    42 #include <QtGui>

    43 #include <QtNetwork>

    44 

    45 #include "client.h"

    46 

    47 Client::Client(QWidget *parent)

    48     : QDialog(parent)

    49 {

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

    51     hostLineEdit = new QLineEdit("fortune");

    52 

    53     hostLabel->setBuddy(hostLineEdit);

    54 

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

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

    57 

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

    59     getFortuneButton->setDefault(true);

    60 

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

    62 

    63     buttonBox = new QDialogButtonBox;

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

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

    66 

    67     socket = new QLocalSocket(this);

    68 

    69     connect(hostLineEdit, SIGNAL(textChanged(const QString &)),

    70             this, SLOT(enableGetFortuneButton()));

    71     connect(getFortuneButton, SIGNAL(clicked()),

    72             this, SLOT(requestNewFortune()));

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

    74     connect(socket, SIGNAL(readyRead()), this, SLOT(readFortune()));

    75     connect(socket, SIGNAL(error(QLocalSocket::LocalSocketError)),

    76             this, SLOT(displayError(QLocalSocket::LocalSocketError)));

    77 

    78     QGridLayout *mainLayout = new QGridLayout;

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

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

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

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

    83     setLayout(mainLayout);

    84 

    85     setWindowTitle(tr("Fortune Client"));

    86     hostLineEdit->setFocus();

    87 }

    88 

    89 void Client::requestNewFortune()

    90 {

    91     getFortuneButton->setEnabled(false);

    92     blockSize = 0;

    93     socket->abort();

    94     socket->connectToServer(hostLineEdit->text());

    95 }

    96 

    97 void Client::readFortune()

    98 {

    99     QDataStream in(socket);

   100     in.setVersion(QDataStream::Qt_4_0);

   101 

   102     if (blockSize == 0) {

   103         if (socket->bytesAvailable() < (int)sizeof(quint16))

   104             return;

   105         in >> blockSize;

   106     }

   107 

   108     if (in.atEnd())

   109         return;

   110 

   111     QString nextFortune;

   112     in >> nextFortune;

   113 

   114     if (nextFortune == currentFortune) {

   115         QTimer::singleShot(0, this, SLOT(requestNewFortune()));

   116         return;

   117     }

   118 

   119     currentFortune = nextFortune;

   120     statusLabel->setText(currentFortune);

   121     getFortuneButton->setEnabled(true);

   122 }

   123 

   124 void Client::displayError(QLocalSocket::LocalSocketError socketError)

   125 {

   126     switch (socketError) {

   127     case QLocalSocket::ServerNotFoundError:

   128         QMessageBox::information(this, tr("Fortune Client"),

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

   130                                     "host name and port settings."));

   131         break;

   132     case QLocalSocket::ConnectionRefusedError:

   133         QMessageBox::information(this, tr("Fortune Client"),

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

   135                                     "Make sure the fortune server is running, "

   136                                     "and check that the host name and port "

   137                                     "settings are correct."));

   138         break;

   139     case QLocalSocket::PeerClosedError:

   140         break;

   141     default:

   142         QMessageBox::information(this, tr("Fortune Client"),

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

   144                                  .arg(socket->errorString()));

   145     }

   146 

   147     getFortuneButton->setEnabled(true);

   148 }

   149 

   150 void Client::enableGetFortuneButton()

   151 {

   152     getFortuneButton->setEnabled(!hostLineEdit->text().isEmpty());

   153 }