bezier_geom_manager.h

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/*
 * This program source code file is part of KiCad, a free EDA CAD application.
 *
 * Copyright The KiCad Developers, see AUTHORS.txt for contributors.
 *
 * 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
 */
 
#pragma once
 
#include <preview_items/multistep_geom_manager.h>
#include <geometry/eda_angle.h>
#include <geometry/seg.h>
 
namespace KIGFX
{
namespace PREVIEW
{

class BEZIER_GEOM_MANAGER : public MULTISTEP_GEOM_MANAGER
{
public:
    BEZIER_GEOM_MANAGER() {}
 
    enum BEZIER_STEPS
    {
        SET_START = 0, 
        SET_CONTROL1,  
        SET_END,       
        SET_CONTROL2,  
        COMPLETE
    };
 
    int getMaxStep() const override { return COMPLETE; }

    BEZIER_STEPS GetStep() const { return static_cast<BEZIER_STEPS>( getStep() ); }
 
    bool acceptPoint( const VECTOR2I& aPt ) override;
 
    /*
     * Geometry query interface - used by clients of the manager
     */

    VECTOR2I GetStart() const;

    VECTOR2I GetControlC1() const;
    VECTOR2I GetControlC2() const;

    VECTOR2I GetEnd() const;
 
private:
    /*
     * Point acceptor functions
     */

    bool setStart( const VECTOR2I& aOrigin );
    bool setControlC1( const VECTOR2I& aControl );
    bool setEnd( const VECTOR2I& aCursor );
    bool setControlC2( const VECTOR2I& aControl );
 
    /*
     * Bezier geometry
     */
    VECTOR2I m_start;
    VECTOR2I m_controlC1;
    VECTOR2I m_end;
    VECTOR2I m_controlC2;
};
 
} // namespace PREVIEW
} // namespace KIGFX