/********************************************************************
**                Image Component Library (ICL)                    **
**                                                                 **
** Copyright (C) 2006-2012 CITEC, University of Bielefeld          **
**                         Neuroinformatics Group                  **
** Website: www.iclcv.org and                                      **
**          http://opensource.cit-ec.de/projects/icl               **
**                                                                 **
** File   : include/ICLQt/StateHandle.h                            **
** Module : ICLQt                                                  **
** Authors: Christof Elbrechter                                    **
**                                                                 **
**                                                                 **
** Commercial License                                              **
** ICL can be used commercially, please refer to our website       **
** www.iclcv.org for more details.                                 **
**                                                                 **
** GNU General Public License Usage                                **
** Alternatively, this file may be used under the terms of the     **
** GNU 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 GNU General Public License  **
** version 3.0 requirements will be met:                           **
** http://www.gnu.org/copyleft/gpl.html.                           **
**                                                                 **
** 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.                                          **
**                                                                 **
*********************************************************************/

#ifndef ICL_STATE_HANDLE_H
#define ICL_STATE_HANDLE_H

#include <string>
#include <ICLQt/GUIHandle.h>
#include <ICLUtils/StringUtils.h>

namespace icl{

  /** \cond */
  class ThreadedUpdatableTextView;
  /** \endcond */


  /// Class for GUI-Label handling a so called state component\ingroup HANDLES
  /** You can add a state component as an alternative std::cout for debugging
      or system state messages
      @see GUI */
  class StateHandle : public GUIHandle<ThreadedUpdatableTextView>{
    int maxLen;
    public:
    
    /// Create an empty handle
    StateHandle(){}
    
    /// Create a new LabelHandle
    StateHandle(ThreadedUpdatableTextView *l, GUIWidget *w,int manLen):
      GUIHandle<ThreadedUpdatableTextView>(l,w),maxLen(maxLen){}
    
    /// appends a string
    void append(const std::string &text);
    
    /// appends anything in std::ostream manner
    template<class T>
    StateHandle &operator<<(const T &t){
      append(str(t));
      return *this;
    }
    
    /// erases all lines
    void clear();
    
    /// sets max line length (odd lines are removed)
    void setMaxLen(int maxLen);
    
    /// returns curren max line length
    int getMaxLen() const;

    private:
    /// utitlity function
    ThreadedUpdatableTextView *text() { return **this; }

    /// utitlity function
    const ThreadedUpdatableTextView *text() const{ return **this; }
    
    /// utility function
    void removeOldLines();
  };

 
  
 
}                               

#endif