77 lines
3.3 KiB
Plaintext
77 lines
3.3 KiB
Plaintext
/****************************************************************************
|
|
**
|
|
** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
|
|
** Contact: http://www.qt-project.org/legal
|
|
**
|
|
** This file is part of the Qt Solutions component.
|
|
**
|
|
** $QT_BEGIN_LICENSE:BSD$
|
|
** 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 Digia Plc 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."
|
|
**
|
|
** $QT_END_LICENSE$
|
|
**
|
|
****************************************************************************/
|
|
|
|
/*! \page qtsingleapplication-example-trivial.html
|
|
\title A Trivial Example
|
|
|
|
The application in this example has a log-view that displays
|
|
messages sent by further instances of the same application.
|
|
|
|
The example demonstrates the use of the QtSingleApplication
|
|
class to detect and communicate with a running instance of
|
|
the application using the sendMessage() API. The messageReceived()
|
|
signal is used to display received messages in a QTextEdit log.
|
|
|
|
\quotefromfile trivial/main.cpp
|
|
\printuntil instance
|
|
The example has only the \c main entry point function.
|
|
A QtSingleApplication object is created immediately.
|
|
|
|
\printuntil return
|
|
If another instance of this application is already running,
|
|
sendMessage() will succeed, and this instance just exits
|
|
immediately.
|
|
|
|
\printuntil show()
|
|
Otherwise the instance continues as normal and creates the
|
|
user interface.
|
|
|
|
\printuntil return instance.exec();
|
|
The \c logview object is also set as the application's activation
|
|
window. Every time a message is received, the window will be raised
|
|
and activated automatically.
|
|
|
|
The messageReceived() signal is also connected to the QTextEdit's
|
|
append() slot. Every message received from further instances of
|
|
this application will be displayed in the log.
|
|
|
|
Finally the event loop is entered.
|
|
*/
|