DwmValueRange.hh

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//===========================================================================
// @(#) $DwmPath$
//===========================================================================
//  Copyright (c) Daniel W. McRobb 2007
//  All rights reserved.
//
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//  modification, are permitted provided that the following conditions
//  are met:
//
//  1. Redistributions of source code must retain the above copyright
//     notice, this list of conditions and the following disclaimer.
//  2. Redistributions in binary form must reproduce the above copyright
//     notice, this list of conditions and the following disclaimer in the
//     documentation and/or other materials provided with the distribution.
//  3. The names of the authors and copyright holders may not be used to
//     endorse or promote products derived from this software without
//     specific prior written permission.
//
//  IN NO EVENT SHALL DANIEL W. MCROBB BE LIABLE TO ANY PARTY FOR
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//  DANIEL W. MCROBB HAS NO OBLIGATION TO PROVIDE MAINTENANCE, SUPPORT,
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//===========================================================================
 
//---------------------------------------------------------------------------
//---------------------------------------------------------------------------
 
#ifndef _DWMVALUERANGE_HH_
#define _DWMVALUERANGE_HH_
 
#include <cassert>
#include <utility>
 
namespace Dwm {
 
  //--------------------------------------------------------------------------
  //--------------------------------------------------------------------------
  template <typename T>
  class ValueRange
    : public std::pair<T,T>
  {
  public:
    //------------------------------------------------------------------------
    //------------------------------------------------------------------------
    ValueRange()
        : std::pair<T,T>()
    { }
 
    //------------------------------------------------------------------------
    //------------------------------------------------------------------------
    ValueRange(const T & low, const T & high)
        : std::pair<T,T>(low, high)
    {
      assert(high >= low);
    }
 
    //------------------------------------------------------------------------
    //------------------------------------------------------------------------
    bool Contains(const T & value) const
    {
      return((value >= this->first) && (value <= this->second));
    }
    
    //------------------------------------------------------------------------
    //------------------------------------------------------------------------
    bool Contains(const ValueRange<T> & range) const
    {
      return(Contains(range.first) && Contains(range.second));
    }
 
    //------------------------------------------------------------------------
    //------------------------------------------------------------------------
    bool Overlaps(const ValueRange<T> & range) const
    {
      return(this->Contains(range.first) 
             || this->Contains(range.second) 
             || range.Contains(this->first) 
             || range.Contains(this->second));
    }
    
  };
 
 
}  // namespace Dwm
 
#endif  // _DWMVALUERANGE_HH_
 
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