cursor.h

/******************************************************************************
 * Project:  wxGIS
 * Purpose:  Cursor class.
 * Author:   Dmitry Baryshnikov (aka Bishop), polimax@mail.ru
 ******************************************************************************
*   Copyright (C) 2011 Dmitry Baryshnikov
*
*    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, see <http://www.gnu.org/licenses/>.
 ****************************************************************************/
#pragma once

#include "wxgis/datasource/gdalinh.h"

#include <list>

class wxGISTable;

class WXDLLIMPEXP_GIS_DS wxFeatureCursor : public wxObject
{
    DECLARE_CLASS(wxFeatureCursor)
public:
    wxFeatureCursor(wxGISTable* pFeatureDataSet);
    virtual ~wxFeatureCursor(void);

    bool IsOk() const;

    bool operator == ( const wxFeatureCursor& obj ) const;
    bool operator != (const wxFeatureCursor& obj) const { return !(*this == obj); };


    virtual void Add(wxGISFeature Feature);
    virtual void Reset(void);
    virtual void Clear(void);
    virtual wxGISFeature Next(void);
    virtual size_t GetCount(void) const;
    virtual wxGISTable* GetDataset() const;
protected:
    virtual wxObjectRefData *CreateRefData() const;
    virtual wxObjectRefData *CloneRefData(const wxObjectRefData *data) const;
protected:
    std::list<wxGISFeature>::const_iterator m_Iterator;
};


class  wxFeatureCursorRefData : public wxObjectRefData
{
    friend class wxFeatureCursor;
public:
    wxFeatureCursorRefData(wxGISTable* pFeatureDataSet);
    virtual ~wxFeatureCursorRefData();
    bool operator == (const wxFeatureCursorRefData& data) const;
    wxFeatureCursorRefData(const wxFeatureCursorRefData& data);

    std::list<wxGISFeature>::const_iterator Begin(void) const;
    wxGISTable* GetDataset() const;
protected:
    std::list<wxGISFeature> m_olFeatures;
    wxGISTable* m_pFeatureDataSet;
};