arc_geom_manager.h

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/*
 * This program source code file is part of KiCad, a free EDA CAD application.
 *
 * Copyright (C) 2017-2021 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
 */
 
#ifndef PREVIEW_ITEMS_ARC_GEOMETRY_MANAGER_H
#define PREVIEW_ITEMS_ARC_GEOMETRY_MANAGER_H
 
#include <preview_items/multistep_geom_manager.h>
#include <geometry/eda_angle.h>
 
namespace KIGFX {
namespace PREVIEW {
 
 
class ARC_GEOM_MANAGER: public MULTISTEP_GEOM_MANAGER
{
public:
    ARC_GEOM_MANAGER()
    {}
 
    enum ARC_STEPS
    {
        SET_ORIGIN = 0,     
        SET_START,          
        SET_ANGLE,          
        COMPLETE
    };
 
    int getMaxStep() const override
    {
        return COMPLETE;
    }
 
    ARC_STEPS GetStep() const
    {
        return static_cast<ARC_STEPS>( getStep() );
    }
 
    bool acceptPoint( const VECTOR2I& aPt ) override;
 
    void SetClockwise( bool aCw );
 
    void ToggleClockwise();
 
    void SetAngleSnap( bool aSnap )
    {
        m_angleSnap = aSnap;
    }
 
    /*
     * Geometry query interface - used by clients of the manager
     */
 
    VECTOR2I GetOrigin() const;
 
    VECTOR2I GetStartRadiusEnd() const;
 
    VECTOR2I GetEndRadiusEnd() const;
 
    double GetRadius() const;
 
    EDA_ANGLE GetStartAngle() const;
 
    EDA_ANGLE GetSubtended() const;
 
private:
 
    /*
     * Point acceptor functions
     */
 
    bool setOrigin( const VECTOR2I& aOrigin );
 
    bool setStart( const VECTOR2I& aEnd );
 
    bool setEnd( const VECTOR2I& aCursor );
 
    /*
     * Arc geometry
     */
    bool      m_clockwise  = true;
    VECTOR2I  m_origin;
    double    m_radius = 0.0;
    EDA_ANGLE m_startAngle;
    EDA_ANGLE m_endAngle;
 
    /*
     * construction parameters
     */
    bool m_angleSnap = false;
    bool m_directionLocked = false;
};
}       // PREVIEW
}       // KIGFX
 
#endif  // PREVIEW_ITEMS_ARC_GEOMETRY_MANAGER_H