diff options
Diffstat (limited to 'qtsingleapplication/doc/html/qtsinglecoreapplication-example-console.html')
| -rw-r--r-- | qtsingleapplication/doc/html/qtsinglecoreapplication-example-console.html | 120 |
1 files changed, 120 insertions, 0 deletions
diff --git a/qtsingleapplication/doc/html/qtsinglecoreapplication-example-console.html b/qtsingleapplication/doc/html/qtsinglecoreapplication-example-console.html new file mode 100644 index 0000000..5c4f642 --- /dev/null +++ b/qtsingleapplication/doc/html/qtsinglecoreapplication-example-console.html @@ -0,0 +1,120 @@ +<?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"> +<!-- console.qdoc --> +<head> + <title>A non-GUI example</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"><img src="images/qt-logo.png" align="left" width="57" height="67" border="0" /></td> +<td width="1"> </td><td class="postheader" valign="center"><a href="index.html"><font color="#004faf">Home</font></a></td> +</tr></table><h1 class="title">A non-GUI example<br /><span class="subtitle"></span> +</h1> +<p>This example shows how to use the single-application functionality in a console application. It does not require the <tt>QtGui</tt> library at all.</p> +<p>The only differences from the GUI application usage demonstrated in the other examples are:</p> +<p>1) The <tt>.pro</tt> file should include <tt>qtsinglecoreapplication.pri</tt> instead of <tt>qtsingleapplication.pri</tt></p> +<p>2) The class name is <tt>QtSingleCoreApplication</tt> instead of <tt>QtSingleApplication</tt>.</p> +<p>3) No calls are made regarding window activation, for obvious reasons.</p> +<p>console.pro:</p> +<pre> TEMPLATE = app + CONFIG += console + SOURCES += main.cpp + include(../../src/qtsinglecoreapplication.pri) + QT -= gui</pre> +<p>main.cpp:</p> +<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 a Qt Solutions component. + ** + ** 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." + ** + ****************************************************************************/</span> + + #include "qtsinglecoreapplication.h" + #include <QtCore/QDebug> + + void report(const QString& msg) + { + qDebug("[%i] %s", (int)QCoreApplication::applicationPid(), qPrintable(msg)); + } + + class MainClass : public QObject + { + Q_OBJECT + public: + MainClass() + : QObject() + {} + + public slots: + void handleMessage(const QString& message) + { + report( "Message received: \"" + message + "\""); + } + }; + + int main(int argc, char **argv) + { + report("Starting up"); + + QtSingleCoreApplication app(argc, argv); + + if (app.isRunning()) { + QString msg(QString("Hi master, I am %1.").arg(QCoreApplication::applicationPid())); + bool sentok = app.sendMessage(msg, 2000); + QString rep("Another instance is running, so I will exit."); + rep += sentok ? " Message sent ok." : " Message sending failed; the other instance may be frozen."; + report(rep); + return 0; + } else { + report("No other instance is running; so I will."); + MainClass mainObj; + QObject::connect(&app, SIGNAL(messageReceived(const QString&)), + &mainObj, SLOT(handleMessage(const QString&))); + return app.exec(); + } + } + + #include "main.moc"</pre> +<p /><address><hr /><div align="center"> +<table width="100%" cellspacing="0" border="0"><tr class="address"> +<td width="30%" align="left">Copyright © 2010 Nokia Corporation and/or its subsidiary(-ies)</td> +<td width="40%" align="center"><a href="http://qt.nokia.com/doc/trademarks.html">Trademarks</a></td> +<td width="30%" align="right"><div align="right">Qt Solutions</div></td> +</tr></table></div></address></body> +</html> |