ThreadedUpdatableSlider.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/ThreadedUpdatableSlider.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.GPL  **
** 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 <QtGui/QSlider>
#include <QtGui/QApplication>
#include <ICLQt/SliderUpdateEvent.h>
#include <ICLUtils/Macros.h>
#include <ICLUtils/Function.h>

namespace icl{
  namespace qt{
    

    class ThreadedUpdatableSlider : public QSlider{
      Q_OBJECT;
      
      struct CB{
        enum Event{ press,release,move,value,all } event;
        utils::Function<void> f; 
      };
      
      std::vector<CB> callbacks;
      
      public:
      
      ThreadedUpdatableSlider(QWidget *parent = 0);
  
      ThreadedUpdatableSlider(Qt::Orientation o, QWidget *parent = 0);
      
      void setValueFromOtherThread(int value){
        QApplication::postEvent(this,new SliderUpdateEvent(value),Qt::HighEventPriority);
      }
      
      virtual bool event ( QEvent * event ){
        ICLASSERT_RETURN_VAL(event,false);
        if(event->type() == SliderUpdateEvent::EVENT_ID){
          setValue(reinterpret_cast<SliderUpdateEvent*>(event)->value);
          return true;
        }else{
          return QSlider::event(event);
        }
      } 
      

      void registerCallback(const utils::Function<void> &cb, const std::string &events="value");
  
      void removeCallbacks();
  
      protected slots:
      void collectValueChanged(int);
  
      void collectSliderPressed();
  
      void collectSliderMoved(int);
  
      void collectSliderReleased();
      
    };
  
  } // namespace qt
}