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// Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
// SPDX-License-Identifier: BSD-3-Clause
#include "qtsinglecoreapplication.h"
#include "qtlocalpeer.h"
/*!
\class QtSingleCoreApplication qtsinglecoreapplication.h
\brief A variant of the QtSingleApplication class for non-GUI applications.
This class is a variant of QtSingleApplication suited for use in
console (non-GUI) applications. It is an extension of
QCoreApplication (instead of QApplication). It does not require
the QtGui library.
The API and usage is identical to QtSingleApplication, except that
functions relating to the "activation window" are not present, for
obvious reasons. Please refer to the QtSingleApplication
documentation for explanation of the usage.
A QtSingleCoreApplication instance can communicate to a
QtSingleApplication instance if they share the same application
id. Hence, this class can be used to create a light-weight
command-line tool that sends commands to a GUI application.
\sa QtSingleApplication
*/
/*!
Creates a QtSingleCoreApplication object. The application identifier
will be QCoreApplication::applicationFilePath(). \a argc and \a
argv are passed on to the QCoreAppliation constructor.
*/
QtSingleCoreApplication::QtSingleCoreApplication(int &argc, char **argv)
: QCoreApplication(argc, argv)
{
peer = new QtLocalPeer(this);
connect(peer, SIGNAL(messageReceived(const QString&)), SIGNAL(messageReceived(const QString&)));
}
/*!
Creates a QtSingleCoreApplication object with the application
identifier \a appId. \a argc and \a argv are passed on to the
QCoreAppliation constructor.
*/
QtSingleCoreApplication::QtSingleCoreApplication(const QString &appId, int &argc, char **argv)
: QCoreApplication(argc, argv)
{
peer = new QtLocalPeer(this, appId);
connect(peer, SIGNAL(messageReceived(const QString&)), SIGNAL(messageReceived(const QString&)));
}
/*!
Returns true if another instance of this application is running;
otherwise false.
This function does not find instances of this application that are
being run by a different user (on Windows: that are running in
another session).
\sa sendMessage()
*/
bool QtSingleCoreApplication::isRunning()
{
return peer->isClient();
}
/*!
Tries to send the text \a message to the currently running
instance. The QtSingleCoreApplication object in the running instance
will emit the messageReceived() signal when it receives the
message.
This function returns true if the message has been sent to, and
processed by, the current instance. If there is no instance
currently running, or if the running instance fails to process the
message within \a timeout milliseconds, this function return false.
\sa isRunning(), messageReceived()
*/
bool QtSingleCoreApplication::sendMessage(const QString &message, int timeout)
{
return peer->sendMessage(message, timeout);
}
/*!
Returns the application identifier. Two processes with the same
identifier will be regarded as instances of the same application.
*/
QString QtSingleCoreApplication::id() const
{
return peer->applicationId();
}
/*!
\fn void QtSingleCoreApplication::messageReceived(const QString& message)
This signal is emitted when the current instance receives a \a
message from another instance of this application.
\sa sendMessage()
*/
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