JLineAttributes.hh

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#ifndef __JROOT__JLINEATTRIBUTES__
#define __JROOT__JLINEATTRIBUTES__

#include <vector>

#include "TAttLine.h"

#include "JLang/JObjectIterator.hh"


/**
 * \author mdejong
 */

namespace JROOT {}
namespace JPP { using namespace JROOT; }

namespace JROOT {

  using JLANG::JRewindableObjectIterator;
      
  
  /**
   * Auxiliary class to set line attributes.
   */
  class JLineAttributes :
    public JRewindableObjectIterator<TAttLine>,
    public std::vector              <TAttLine>
  {
  public:

    typedef JRewindableObjectIterator<TAttLine>::pointer_type  pointer_type;

    
    /**
     * Constructor.
     *
     * \param  width         line width
     */
    JLineAttributes(const Width_t width = 2) :
      std::vector<TAttLine>(),
      index(0)
    {
      for (int i = 1; i <= 10; ++i) {
        push_back(TAttLine(kBlack, i, width));
      }
    }


    /**
     * Get reference to unique instance of this class object.
     *
     * \return               reference to this class object
     */
    static JLineAttributes& getInstance()
    {
      static JLineAttributes line(2);
    
      return line;
    }


    /**
     * Set line width.
     *
     * \param  width         line width
     */
    void setLineWidth(const Width_t width)
    {
      for (iterator i = this->begin(); i != this->end(); ++i) {
        i->SetLineWidth(width);
      }
    }
  

    /**
     * Rewind index.
     */
    virtual void rewind() override 
    {
      index = 0;
    }
  

    /**
     * Check availability of next element.
     *
     * \return               true if the iteration has more elements; else false
     */
    virtual bool hasNext() override 
    {
      return !this->empty();
    }


    /**
     * Get next element.
     *
     * \return               pointer to element
     */
    virtual const pointer_type& next() override 
    {
      static pointer_type ps;

      if (index < this->size()) {
        ps.reset(&this->at(index));
      }

      ++index;
      
      index = index%this->size();
      
      return ps;
    }


    /**
     * Get line attributes.
     *
     * \param  index         index
     * \return               line attributes
     */
    const TAttLine& get(unsigned int index)
    {
      return this->at(index%this->size());
    }
  

  private:
    unsigned int index;
  };
}

#endif