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Diffstat (limited to 'examples/ipc/localfortuneclient/client.cpp')
| -rw-r--r-- | examples/ipc/localfortuneclient/client.cpp | 152 |
1 files changed, 152 insertions, 0 deletions
diff --git a/examples/ipc/localfortuneclient/client.cpp b/examples/ipc/localfortuneclient/client.cpp new file mode 100644 index 0000000000..c8c3fe4f35 --- /dev/null +++ b/examples/ipc/localfortuneclient/client.cpp @@ -0,0 +1,152 @@ +/**************************************************************************** +** +** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies). +** All rights reserved. +** Contact: Nokia Corporation (qt-info@nokia.com) +** +** This file is part of the examples of the Qt Toolkit. +** +** $QT_BEGIN_LICENSE:BSD$ +** You may use this file under the terms of the BSD license as follows: +** +** "Redistribution and use in source and binary forms, with or without +** modification, are permitted provided that the following conditions are +** met: +** * Redistributions of source code must retain the above copyright +** notice, this list of conditions and the following disclaimer. +** * Redistributions in binary form must reproduce the above copyright +** notice, this list of conditions and the following disclaimer in +** the documentation and/or other materials provided with the +** distribution. +** * Neither the name of Nokia Corporation and its Subsidiary(-ies) nor +** the names of its contributors may be used to endorse or promote +** products derived from this software without specific prior written +** permission. +** +** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS +** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT +** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR +** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT +** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, +** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT +** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, +** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY +** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT +** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE +** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE." +** $QT_END_LICENSE$ +** +****************************************************************************/ + +#include <QtGui> +#include <QtNetwork> + +#include "client.h" + +Client::Client(QWidget *parent) + : QDialog(parent) +{ + hostLabel = new QLabel(tr("&Server name:")); + hostLineEdit = new QLineEdit("fortune"); + + hostLabel->setBuddy(hostLineEdit); + + 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); + + quitButton = new QPushButton(tr("Quit")); + + buttonBox = new QDialogButtonBox; + buttonBox->addButton(getFortuneButton, QDialogButtonBox::ActionRole); + buttonBox->addButton(quitButton, QDialogButtonBox::RejectRole); + + socket = new QLocalSocket(this); + + connect(hostLineEdit, SIGNAL(textChanged(QString)), + this, SLOT(enableGetFortuneButton())); + connect(getFortuneButton, SIGNAL(clicked()), + this, SLOT(requestNewFortune())); + connect(quitButton, SIGNAL(clicked()), this, SLOT(close())); + connect(socket, SIGNAL(readyRead()), this, SLOT(readFortune())); + connect(socket, SIGNAL(error(QLocalSocket::LocalSocketError)), + this, SLOT(displayError(QLocalSocket::LocalSocketError))); + + QGridLayout *mainLayout = new QGridLayout; + mainLayout->addWidget(hostLabel, 0, 0); + mainLayout->addWidget(hostLineEdit, 0, 1); + mainLayout->addWidget(statusLabel, 2, 0, 1, 2); + mainLayout->addWidget(buttonBox, 3, 0, 1, 2); + setLayout(mainLayout); + + setWindowTitle(tr("Fortune Client")); + hostLineEdit->setFocus(); +} + +void Client::requestNewFortune() +{ + getFortuneButton->setEnabled(false); + blockSize = 0; + socket->abort(); + socket->connectToServer(hostLineEdit->text()); +} + +void Client::readFortune() +{ + QDataStream in(socket); + in.setVersion(QDataStream::Qt_4_0); + + if (blockSize == 0) { + if (socket->bytesAvailable() < (int)sizeof(quint16)) + return; + in >> blockSize; + } + + if (in.atEnd()) + 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(QLocalSocket::LocalSocketError socketError) +{ + switch (socketError) { + case QLocalSocket::ServerNotFoundError: + QMessageBox::information(this, tr("Fortune Client"), + tr("The host was not found. Please check the " + "host name and port settings.")); + break; + case QLocalSocket::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; + case QLocalSocket::PeerClosedError: + break; + default: + QMessageBox::information(this, tr("Fortune Client"), + tr("The following error occurred: %1.") + .arg(socket->errorString())); + } + + getFortuneButton->setEnabled(true); +} + +void Client::enableGetFortuneButton() +{ + getFortuneButton->setEnabled(!hostLineEdit->text().isEmpty()); +} |