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104 lines
3.9 KiB
104 lines
3.9 KiB
/***************************************************************************
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* Copyright (C) 2010 - 2013 by Artem 'DOOMer' Galichkin *
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* doomer3d@gmail.com *
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* *
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* This program is free software; you can redistribute it and/or modify *
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* it under the terms of the GNU General Public License as published by *
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* the Free Software Foundation; either version 2 of the License, or *
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* (at your option) any later version. *
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* *
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* This program is distributed in the hope that it will be useful, *
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* but WITHOUT ANY WARRANTY; without even the implied warranty of *
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
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* GNU General Public License for more details. *
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* *
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* You should have received a copy of the GNU General Public License *
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* along with this program. If not, see <http://www.gnu.org/licenses/>. *
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***************************************************************************/
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#include <QTimer>
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#include <QByteArray>
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#include <QLocalSocket>
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#include "singleapp.h"
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/*!
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Creates of sungle application object
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\param argc Nuber of command line arguments
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\param argv Array of command line argwuments
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\param uniqueKey String key fo unicue shared data indefier
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*/
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SingleApp::SingleApp(int& argc, char* argv[], const QString keyString) : QApplication(argc, argv), uniqueKey(keyString)
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{
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sharedMemory.setKey(uniqueKey);
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if (sharedMemory.attach())
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runned = true;
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else
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{
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runned = false;
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// create shared memory.
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if (!sharedMemory.create(1))
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{
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qDebug("Unable to create single instance.");
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return;
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}
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// create local server and listen to incomming messages from other instances.
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localServer = new QLocalServer(this);
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connect(localServer, SIGNAL(newConnection()), this, SLOT(receiveMessage()));
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localServer->listen(uniqueKey);
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}
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}
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// public slots.
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void SingleApp::receiveMessage()
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{
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QLocalSocket *localSocket = localServer->nextPendingConnection();
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if (!localSocket->waitForReadyRead(timeout))
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{
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qDebug("%s", qPrintable(localSocket->errorString().toLatin1()));
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return;
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}
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QByteArray byteArray = localSocket->readAll();
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QString message = QString::fromUtf8(byteArray.constData());
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emit messageReceived(message);
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localSocket->disconnectFromServer();
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}
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// public functions.
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/*!
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Checking instance application
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\return bool Return tue is another instance running
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*/
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bool SingleApp::isRunning()
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{
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return runned;
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}
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/*1
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Sending message to another running instance of application
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\param message String dended message
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\tryitn bool Return status ofsending message process
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*/
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bool SingleApp::sendMessage(const QString &message)
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{
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if (!runned)
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return false;
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QLocalSocket localSocket(this);
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localSocket.connectToServer(uniqueKey, QIODevice::WriteOnly);
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if (!localSocket.waitForConnected(timeout))
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{
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qDebug("%s",qPrintable(localSocket.errorString().toLatin1()));
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return false;
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}
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localSocket.write(message.toUtf8());
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if (!localSocket.waitForBytesWritten(timeout))
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{
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qDebug("%s",qPrintable(localSocket.errorString().toLatin1()));
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return false;
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}
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localSocket.disconnectFromServer();
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return true;
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}
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