AirTV-Qt/qtsingleapplication/examples/console/main.cpp

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  39
  40
  41 #include "qtsinglecoreapplication.h"
  42 #include <QtCore/QDebug>
  43
  44
  45 void report(const QString& msg)
  46 {
  47     qDebug("[%i] %s", (int)QCoreApplication::applicationPid(), qPrintable(msg));
  48 }
  49
  50 class MainClass : public QObject
  51 {
  52     Q_OBJECT
  53 public:
  54     MainClass()
  55         : QObject()
  56         {}
  57
  58 public slots:
  59     void handleMessage(const QString& message)
  60         {
  61             report( "Message received: \"" + message + "\"");
  62         }
  63 };
  64
  65 int main(int argc, char **argv)
  66 {
  67     report("Starting up");
  68
  69     QtSingleCoreApplication app(argc, argv);
  70
  71     if (app.isRunning()) {
  72         QString msg(QString("Hi master, I am %1.").arg(QCoreApplication::applicationPid()));
  73         bool sentok = app.sendMessage(msg, 2000);
  74         QString rep("Another instance is running, so I will exit.");
  75         rep += sentok ? " Message sent ok." : " Message sending failed; the other instance may be frozen.";
  76         report(rep);
  77         return 0;
  78     } else {
  79         report("No other instance is running; so I will.");
  80         MainClass mainObj;
  81         QObject::connect(&app, SIGNAL(messageReceived(const QString&)),
  82                          &mainObj, SLOT(handleMessage(const QString&)));
  83         return app.exec();
  84     }
  85 }
  86
  87
  88 #include "main.moc"