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// Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
// SPDX-License-Identifier: BSD-3-Clause
/*! \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.
*/
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