view_item.h

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/*
 * This program source code file is part of KiCad, a free EDA CAD application.
 *
 * Copyright (C) 2013-2016 CERN
 * Copyright (C) 2020 KiCad Developers, see AUTHORS.txt for contributors.
 *
 * @author Tomasz Wlostowski <tomasz.wlostowski@cern.ch>
 *
 * 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, you may find one here:
 * http://www.gnu.org/licenses/old-licenses/gpl-2.0.html
 * or you may search the http://www.gnu.org website for the version 2 license,
 * or you may write to the Free Software Foundation, Inc.,
 * 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA
 */

#ifndef __VIEW_ITEM_H
#define __VIEW_ITEM_H

#include <vector>
#include <bitset>
#include <math/box2.h>
#include <inspectable.h>


namespace KIGFX
{
// Forward declarations
class VIEW;
class VIEW_ITEM_DATA;

enum VIEW_UPDATE_FLAGS {
    NONE        = 0x00,     
    APPEARANCE  = 0x01,     
    COLOR       = 0x02,     
    GEOMETRY    = 0x04,     
    LAYERS      = 0x08,     
    INITIAL_ADD = 0x10,     
    REPAINT     = 0x20,     
    ALL         = 0xef      
};

enum VIEW_VISIBILITY_FLAGS {
    VISIBLE     = 0x01,     
    HIDDEN      = 0x02      
};

class VIEW_ITEM : public INSPECTABLE
{
public:
    VIEW_ITEM() : m_viewPrivData( nullptr )
    {
    }

    virtual ~VIEW_ITEM();

    VIEW_ITEM( const VIEW_ITEM& aOther ) = delete;
    VIEW_ITEM& operator=( const VIEW_ITEM& aOther ) = delete;

    virtual const BOX2I ViewBBox() const = 0;

    virtual void ViewDraw( int aLayer, VIEW* aView ) const
    {}

    virtual void ViewGetLayers( int aLayers[], int& aCount ) const = 0;

    virtual double ViewGetLOD( int aLayer, VIEW* aView ) const
    {
        // By default always show the item
        return 0.0;
    }

    VIEW_ITEM_DATA* viewPrivData() const
    {
        return m_viewPrivData;
    }

    void ClearViewPrivData()
    {
        m_viewPrivData = nullptr;
    }

private:
    friend class VIEW;

    VIEW_ITEM_DATA* m_viewPrivData;
};

} // namespace KIGFX

#endif