VisionPlus_V3.0/ScreenLock/QSoleApplication.cpp

#include "qsoleapplication.h"
#include <QLocalSocket>
#include <QLocalServer>
#include <QFile>
#include <QDebug>
#include <QDateTime>

QSoleApplication::QSoleApplication(int &argc, char **argv)
    :QApplication(argc,argv)
{
}

QSoleApplication::~QSoleApplication()
{

}

bool QSoleApplication::isRunningSameApp()
{
    QString serverName = QCoreApplication::applicationName();
    qDebug()<<QDateTime::currentDateTime()<<"new"<<serverName;
    QLocalSocket socket;
    socket.connectToServer(serverName);

    if (socket.waitForConnected(500))
    { //如果能够连接得上的话，将参数发送到服务器，然后退出
        qDebug()<<QDateTime::currentDateTime()<<"Connected To Socket";

        QTextStream stream(&socket);
        QStringList args = QCoreApplication::arguments();

        if (args.count() > 1)
            stream << args.last();
        else
            stream << QString();
        stream.flush();
        socket.waitForBytesWritten();
        //qApp->quit();
        return true;
    }

    //运行到这里，说明没有实例在运行，那么创建服务器。

    m_localServer = new QLocalServer(this);

    connect(m_localServer, SIGNAL(newConnection()),
                this, SLOT(newLocalSocketConnection())); //监听新到来的连接

    if (!m_localServer->listen(serverName))
    {
        if (m_localServer->serverError() == QAbstractSocket::AddressInUseError
                && QFile::exists(m_localServer->serverName())) { //确保能够监听成功
            QFile::remove(m_localServer->serverName());
            m_localServer->listen(serverName);
        }
    }
    return false;
}

void QSoleApplication::newLocalSocketConnection()
{
    QLocalSocket *socket = m_localServer->nextPendingConnection();

    if (!socket)
            return;
    socket->waitForReadyRead(1000);
    //QTextStream stream(socket);
    //其他处理
    emit newSocketConnect();
    qDebug()<<"newSocketConnect";

    delete socket;
}