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Trolltech reserves all rights not expressly ** granted herein. ** ** This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE ** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. ** ****************************************************************************/ #include <QtGui> #include <QtNetwork> #include "client.h" Client::Client(QWidget *parent) : QDialog(parent) { hostLabel = new QLabel(tr("&Server name:")); portLabel = new QLabel(tr("S&erver port:")); hostLineEdit = new QLineEdit("Localhost"); portLineEdit = new QLineEdit; portLineEdit->setValidator(new QIntValidator(1, 65535, this)); hostLabel->setBuddy(hostLineEdit); portLabel->setBuddy(portLineEdit); statusLabel = new QLabel(tr("This examples requires that you run the " "Fortune Server example as well.")); getFortuneButton = new QPushButton(tr("Get Fortune")); getFortuneButton->setDefault(true); getFortuneButton->setEnabled(false); quitButton = new QPushButton(tr("Quit")); buttonBox = new QDialogButtonBox; buttonBox->addButton(getFortuneButton, QDialogButtonBox::ActionRole); buttonBox->addButton(quitButton, QDialogButtonBox::RejectRole); tcpSocket = new QTcpSocket(this); connect(hostLineEdit, SIGNAL(textChanged(const QString &)), this, SLOT(enableGetFortuneButton())); connect(portLineEdit, SIGNAL(textChanged(const QString &)), this, SLOT(enableGetFortuneButton())); connect(getFortuneButton, SIGNAL(clicked()), this, SLOT(requestNewFortune())); connect(quitButton, SIGNAL(clicked()), this, SLOT(close())); connect(tcpSocket, SIGNAL(readyRead()), this, SLOT(readFortune())); connect(tcpSocket, SIGNAL(error(QAbstractSocket::SocketError)), this, SLOT(displayError(QAbstractSocket::SocketError))); QGridLayout *mainLayout = new QGridLayout; mainLayout->addWidget(hostLabel, 0, 0); mainLayout->addWidget(hostLineEdit, 0, 1); mainLayout->addWidget(portLabel, 1, 0); mainLayout->addWidget(portLineEdit, 1, 1); mainLayout->addWidget(statusLabel, 2, 0, 1, 2); mainLayout->addWidget(buttonBox, 3, 0, 1, 2); setLayout(mainLayout); setWindowTitle(tr("Fortune Client")); portLineEdit->setFocus(); } void Client::requestNewFortune() { getFortuneButton->setEnabled(false); blockSize = 0; tcpSocket->abort(); tcpSocket->connectToHost(hostLineEdit->text(), portLineEdit->text().toInt()); } void Client::readFortune() { QDataStream in(tcpSocket); in.setVersion(QDataStream::Qt_4_0); if (blockSize == 0) { if (tcpSocket->bytesAvailable() < (int)sizeof(quint16)) return; in >> blockSize; } if (tcpSocket->bytesAvailable() < blockSize) return; QString nextFortune; in >> nextFortune; if (nextFortune == currentFortune) { QTimer::singleShot(0, this, SLOT(requestNewFortune())); return; } currentFortune = nextFortune; statusLabel->setText(currentFortune); getFortuneButton->setEnabled(true); } void Client::displayError(QAbstractSocket::SocketError socketError) { switch (socketError) { case QAbstractSocket::RemoteHostClosedError: break; case QAbstractSocket::HostNotFoundError: QMessageBox::information(this, tr("Fortune Client"), tr("The host was not found. Please check the " "host name and port settings.")); break; case QAbstractSocket::ConnectionRefusedError: QMessageBox::information(this, tr("Fortune Client"), tr("The connection was refused by the peer. " "Make sure the fortune server is running, " "and check that the host name and port " "settings are correct.")); break; default: QMessageBox::information(this, tr("Fortune Client"), tr("The following error occurred: %1.") .arg(tcpSocket->errorString())); } getFortuneButton->setEnabled(true); } void Client::enableGetFortuneButton() { getFortuneButton->setEnabled(!hostLineEdit->text().isEmpty() && !portLineEdit->text().isEmpty()); }