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    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     hostLineEdit = new QLineEdit("Localhost");

    54     portLineEdit = new QLineEdit;

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

    56 

    57     hostLabel->setBuddy(hostLineEdit);

    58     portLabel->setBuddy(portLineEdit);

    59 

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

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

    62 

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

    64     getFortuneButton->setDefault(true);

    65     getFortuneButton->setEnabled(false);

    66 

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

    68 

    69     buttonBox = new QDialogButtonBox;

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

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

    72 

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

    74             this, SLOT(enableGetFortuneButton()));

    75     connect(portLineEdit, SIGNAL(textChanged(const QString &)),

    76             this, SLOT(enableGetFortuneButton()));

    77     connect(getFortuneButton, SIGNAL(clicked()),

    78             this, SLOT(requestNewFortune()));

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

    80 //! [0]

    81     connect(&thread, SIGNAL(newFortune(const QString &)),

    82             this, SLOT(showFortune(const QString &)));

    83 //! [0] //! [1]

    84     connect(&thread, SIGNAL(error(int, const QString &)),

    85             this, SLOT(displayError(int, const QString &)));

    86 //! [1]

    87 

    88     QGridLayout *mainLayout = new QGridLayout;

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

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

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

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

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

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

    95     setLayout(mainLayout);

    96 

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

    98     portLineEdit->setFocus();

    99 }

   100 

   101 //! [2]

   102 void BlockingClient::requestNewFortune()

   103 {

   104     getFortuneButton->setEnabled(false);

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

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

   107 }

   108 //! [2]

   109 

   110 //! [3]

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

   112 {

   113     if (nextFortune == currentFortune) {

   114         requestNewFortune();

   115         return;

   116     }

   117 //! [3]

   118 

   119 //! [4]

   120     currentFortune = nextFortune;

   121     statusLabel->setText(currentFortune);

   122     getFortuneButton->setEnabled(true);

   123 }

   124 //! [4]

   125 

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

   127 {

   128     switch (socketError) {

   129     case QAbstractSocket::HostNotFoundError:

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

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

   132                                     "host and port settings."));

   133         break;

   134     case QAbstractSocket::ConnectionRefusedError:

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

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

   137                                     "Make sure the fortune server is running, "

   138                                     "and check that the host name and port "

   139                                     "settings are correct."));

   140         break;

   141     default:

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

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

   144                                  .arg(message));

   145     }

   146 

   147     getFortuneButton->setEnabled(true);

   148 }

   149 

   150 void BlockingClient::enableGetFortuneButton()

   151 {

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

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

   154 }