<?xml version="1.0" encoding="iso-8859-1"?>
<!DOCTYPE html
PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
<head>
<title>Qt 4.6: client.cpp Example File (ipc/localfortuneclient/client.cpp)</title>
<link href="classic.css" rel="stylesheet" type="text/css" />
</head>
<body>
<table border="0" cellpadding="0" cellspacing="0" width="100%">
<tr>
<td align="left" valign="top" width="32"><a href="http://qt.nokia.com/"><img src="images/qt-logo.png" align="left" border="0" /></a></td>
<td width="1"> </td><td class="postheader" valign="center"><a href="index.html"><font color="#004faf">Home</font></a> · <a href="classes.html"><font color="#004faf">All Classes</font></a> · <a href="functions.html"><font color="#004faf">All Functions</font></a> · <a href="overviews.html"><font color="#004faf">Overviews</font></a></td></tr></table><h1 class="title">client.cpp Example File<br /><span class="small-subtitle">ipc/localfortuneclient/client.cpp</span>
</h1>
<pre><span class="comment"> /****************************************************************************
**
** Copyright (C) 2010 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.
**
** $QT_BEGIN_LICENSE:LGPL$
** Commercial Usage
** Licensees holding valid Qt Commercial licenses may use this file in
** accordance with the Qt Commercial License Agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and Nokia.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 2.1 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL included in the
** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 2.1 requirements
** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** In addition, as a special exception, Nokia gives you certain additional
** rights. These rights are described in the Nokia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 3.0 as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL included in the
** packaging of this file. Please review the following information to
** ensure the GNU General Public License version 3.0 requirements will be
** met: http://www.gnu.org/copyleft/gpl.html.
**
** If you have questions regarding the use of this file, please contact
** Nokia at qt-info@nokia.com.
** $QT_END_LICENSE$
**
****************************************************************************/</span>
#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());
}</pre>
<p /><address><hr /><div align="center">
<table width="100%" cellspacing="0" border="0"><tr class="address">
<td width="40%" align="left">Copyright © 2010 Nokia Corporation and/or its subsidiary(-ies)</td>
<td width="20%" align="center"><a href="trademarks.html">Trademarks</a></td>
<td width="40%" align="right"><div align="right">Qt 4.6.3</div></td>
</tr></table></div></address></body>
</html>
distrib
>
Mandriva
>
current
>
i586
>
media
>
main-updates
>
by-pkgid
>
8e6051afcdb111a0317a58fb64c2abf5
>
files
>
2563
