arc_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, see <https://www.gnu.org/licenses/>.
 */
 
#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