#if ((Q == 1) || (Q == 2) || (Q == 3))
#include <QtWidgets/QApplication>
#else
#include <QtCore/QCoreApplication>
#endif

#include <QtCore/QDebug>
#include <iostream>
#include <sstream>

#if (Q == 2)
#define DEF_LOGGER(x)            \
  {                              \
    std::cout << x << std::endl; \
    qDebug(x);                   \
  }
#else
#define DEF_LOGGER(x)            \
  {                              \
    std::cout << x << std::endl; \
  }
#endif

#if (Q != 3)
void messageHandler(QtMsgType type, const QMessageLogContext& context,
                    const QString& msg)
{
  bool babort = false;

  const char* file = context.file ? context.file : "";
  const char* function = context.function ? context.function : "";

  std::stringstream log;
  log << "messageHandler (" << file << ":" << context.line << ", " << function
      << "). Message: " << msg.toStdString();
  bool error = false;
  std::string stype;
  switch (type)
  {
    case QtDebugMsg:
      stype = "DEBUG";
      break;
    case QtWarningMsg:
      stype = "WARNING";
      break;
    case QtInfoMsg:
      stype = "INFO";
      break;
    case QtCriticalMsg:
      stype = "ERROR";
      break;
    case QtFatalMsg:
      stype = "FATAL";
      babort = true;
  }

  if (error)
  {
    std::cerr << stype << "." << log.str() << std::endl;
  }
  else
  {
    std::cout << stype << "." << log.str() << std::endl;
  }

  if (babort)
  {
    abort();
  }
}
#endif

int main(int argc, char* argv[])
{
#if (Q != 3)
  DEF_LOGGER("before qInstallMessageHandler");
  qInstallMessageHandler(messageHandler);
  DEF_LOGGER("after qInstallMessageHandler");
#endif
  DEF_LOGGER("before QxxxxApplication");
#if ((Q == 1) || (Q == 2) || (Q == 3))
  QApplication a(argc, argv);
#else
  QCoreApplication a(argc, argv);
#endif
  DEF_LOGGER("before QxxxxApplication");

  DEF_LOGGER("QQ tras");
  return a.exec();
}