From 5300c9dd1261a7f4ff8bf5a83608470e4953dd0f Mon Sep 17 00:00:00 2001 From: Gluzskiy Alexandr Date: Sat, 5 Nov 2011 03:24:07 +0200 Subject: this will be paid later --- .../qtsinglecoreapplication-example-console.html | 120 +++++++++++++++++++++ 1 file changed, 120 insertions(+) create mode 100755 libs/qtsingleapplication/doc/html/qtsinglecoreapplication-example-console.html (limited to 'libs/qtsingleapplication/doc/html/qtsinglecoreapplication-example-console.html') diff --git a/libs/qtsingleapplication/doc/html/qtsinglecoreapplication-example-console.html b/libs/qtsingleapplication/doc/html/qtsinglecoreapplication-example-console.html new file mode 100755 index 0000000..5c4f642 --- /dev/null +++ b/libs/qtsingleapplication/doc/html/qtsinglecoreapplication-example-console.html @@ -0,0 +1,120 @@ + + + + + + A non-GUI example + + + + + + + +

A non-GUI example
+

This example shows how to use the single-application functionality in a console application. It does not require the QtGui library at all.

The only differences from the GUI application usage demonstrated in the other examples are:

1) The .pro file should include qtsinglecoreapplication.pri instead of qtsingleapplication.pri

2) The class name is QtSingleCoreApplication instead of QtSingleApplication.

3) No calls are made regarding window activation, for obvious reasons.

console.pro:

 TEMPLATE   = app
+ CONFIG    += console
+ SOURCES   += main.cpp
+ include(../../src/qtsinglecoreapplication.pri)
+ QT -= gui

main.cpp:

 /****************************************************************************
+ **
+ ** 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."
+ **
+ ****************************************************************************/
+
+ #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"

+ + + + +

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Qt Solutions

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