kis_iteratorpixeltrait.h

/* This file is part of the KDE project
 *  Copyright (c) 2004 Cyrille Berger <cberger@cberger.net>, the original iteratorpixel
 *  Copyright (c) 2005 Casper Boemann <cbr@boemann.dk>, made it into a trait
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2 of the License, or
 *  (at your option) any later version.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program; if not, write to the Free Software
 *  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
 
#ifndef KIS_ITERATORPIXELTRAIT_H_
#define KIS_ITERATORPIXELTRAIT_H_
 
#include "kis_iterator.h"
#include <kis_paint_device.h>
 
template< typename _iTp>
class KisIteratorPixelTrait
{
public:
    KisIteratorPixelTrait(KisPaintDevice * ndevice, _iTp *underlyingIterator)
    :    m_device(ndevice),
        m_underlyingIterator(underlyingIterator)
    {
        m_selectionIterator = NULL;
    };
 
    ~KisIteratorPixelTrait()
    {
        delete m_selectionIterator;
    };
 
    KisIteratorPixelTrait(const KisIteratorPixelTrait& rhs)
    {
        if (this == &rhs)
            return;
        m_device = rhs.m_device;
        m_underlyingIterator = rhs.m_underlyingIterator;
 
        if (rhs.m_selectionIterator) {
            m_selectionIterator = new _iTp(*rhs.m_selectionIterator);
        } else {
            m_selectionIterator = 0;
        }
    }
 
    KisIteratorPixelTrait& operator=(const KisIteratorPixelTrait& rhs)
    {
        if (this == &rhs)
            return *this;
        m_device = rhs.m_device;
        m_underlyingIterator = rhs.m_underlyingIterator;
 
        delete m_selectionIterator;
        if (rhs.m_selectionIterator) {
            m_selectionIterator = new _iTp(*rhs.m_selectionIterator);
        } else {
            m_selectionIterator = 0;
        }
 
        return *this;
    }
 
 
public:
    inline TQ_UINT8 operator[](int index) const
            { return m_underlyingIterator->rawData()[index]; };

    inline bool isSelected() const
        {
            if (m_selectionIterator)
                return *(m_selectionIterator->rawData()) > SELECTION_THRESHOLD;
            else
                return true;
        };

    inline TQ_UINT8 selectedness() const
        {
            if (m_selectionIterator)
                return *(m_selectionIterator->rawData());
            else {
                return MAX_SELECTED;
            }
        };

    inline TQ_UINT8 * selectionMask() const
        {
            if ( m_selectionIterator )
                return m_selectionIterator->rawData();
            else
                return 0;
        }
 
 
protected:
    KisPaintDevice *m_device;
 
    inline void advance(int n){if (m_selectionIterator) for(int i=0; i< n; i++) ++(*m_selectionIterator);};
    inline void retreat(){if (m_selectionIterator) --(*m_selectionIterator);};
 
    void setSelectionIterator(_iTp *si){m_selectionIterator = si;};
 
    _iTp *m_underlyingIterator;
    _iTp *m_selectionIterator;
};
 
#endif