Application.h

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/********************************************************************
**                Image Component Library (ICL)                    **
**                                                                 **
** Copyright (C) 2006-2013 CITEC, University of Bielefeld          **
**                         Neuroinformatics Group                  **
** Website: www.iclcv.org and                                      **
**          http://opensource.cit-ec.de/projects/icl               **
**                                                                 **
** File   : ICLQt/src/ICLQt/Application.h                          **
** Module : ICLQt                                                  **
** Authors: Christof Elbrechter                                    **
**                                                                 **
**                                                                 **
** GNU LESSER GENERAL PUBLIC LICENSE                               **
** This file may be used under the terms of the GNU Lesser General **
** Public License version 3.0 as published by the                  **
**                                                                 **
** Free Software Foundation and appearing in the file LICENSE.LGPL **
** included in the packaging of this file.  Please review the      **
** following information to ensure the license requirements will   **
** be met: http://www.gnu.org/licenses/lgpl-3.0.txt                **
**                                                                 **
** The development of this software was supported by the           **
** Excellence Cluster EXC 277 Cognitive Interaction Technology.    **
** The Excellence Cluster EXC 277 is a grant of the Deutsche       **
** Forschungsgemeinschaft (DFG) in the context of the German       **
** Excellence Initiative.                                          **
**                                                                 **
********************************************************************/

#pragma once

#include <ICLUtils/CompatMacros.h>
#include <ICLUtils/Exception.h>
#include <ICLUtils/Function.h>
#include <string>
#include <vector>

#include <QApplication>
#include <QtOpenGL/QGLWidget>

namespace icl{

  namespace qt{

    struct ExecThread;

    class ICLQt_API ICLApplication : public QObject{
      Q_OBJECT;

          private Q_SLOTS:
      void lastWindowClosed();

      public:
      QApplication *app;
      QGLWidget *sharedWidget;

      typedef void (*callback)(void);

      struct SecondSingeltonException : public utils::ICLException{
        SecondSingeltonException(const std::string &reason):utils::ICLException(reason){}
      };


      ICLApplication(int argc, char **argv, const std::string &paInitString="",
                     callback init=0, callback run=0,
                     callback run2=0, callback run3=0,
                     callback run4=0, callback run5=0);

      ~ICLApplication();


      void addThread(callback cb);


      void addInit(callback cb);


      void addFinalization(callback cb);


                        void addPrepareShutDown(callback cb);


      int exec();

      struct AsynchronousEvent{
        virtual void execute() = 0;

        virtual ~AsynchronousEvent(){}
      };


      void executeInGUIThread(AsynchronousEvent *event, bool blocking = false, bool forcePostEvent = false);


      template<class T>
      void executeInGUIThread(utils::Function<void,T> f, T data, bool blocking = false, bool forcePostEvent = false){
        struct TmpAsynchronousEvent : public AsynchronousEvent{
          T data;
          utils::Function<void,T> f;
          TmpAsynchronousEvent(T data, utils::Function<void,T> f):data(data),f(f){}
          void execute(){
            f(data);
          }
        };
        executeInGUIThread(new TmpAsynchronousEvent(data,f),blocking, forcePostEvent);
      }


      template<class T,class U>
      void executeInGUIThread(utils::Function<void,T,U> f, T t, U u, bool blocking = false, bool forcePostEvent = false){
        struct TmpAsynchronousEvent : public AsynchronousEvent{
          T t;
          U u;
          utils::Function<void,T,U> f;
          TmpAsynchronousEvent(T t, U u, utils::Function<void,T,U> f):t(t),u(u),f(f){}
          void execute(){
            f(t,u);
          }
        };
        executeInGUIThread(new TmpAsynchronousEvent(t,u,f),blocking, forcePostEvent);
      }


      virtual bool event(QEvent *eIn);

      static ICLApplication *instance();

      static bool isGUIThreadActive();

      private:
      static ICLApplication *s_app;

      static std::vector<ExecThread*> s_threads;

      static std::vector<callback> s_inits;


      static std::vector<callback> s_callbacks;

      static std::vector<callback> s_finalizes;

                        static std::vector<callback> s_prepare_shutdowns;
    };

    typedef ICLApplication ICLApp;
  } // namespace qt
}