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/*
* This program source code file is part of KiCad, a free EDA CAD application.
*
* Copyright (C) 2017 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_TWO_POINT_GEOMETRY_MANAGER_H
#define PREVIEW_ITEMS_TWO_POINT_GEOMETRY_MANAGER_H
#include <math/vector2d.h>
#include <common.h>
namespace KIGFX
{
class GAL;
namespace PREVIEW
{
/**
* Class TWO_POINT_GEOMETRY_MANAGER
*
* Represents a very simple geometry manager for items that have
* a start and end point.
*/
class TWO_POINT_GEOMETRY_MANAGER
{
public:
///> Set the origin of the ruler (the fixed end)
void SetOrigin( const VECTOR2I& aOrigin )
{
m_origin = aOrigin;
}
VECTOR2I GetOrigin() const
{
return m_origin;
}
/**
* Set the current end of the rectangle (the end that moves
* with the cursor.
*/
void SetEnd( const VECTOR2I& aEnd )
{
if( m_angleSnap )
{
const auto vec = aEnd - m_origin;
const auto len = vec.EuclideanNorm();
const auto angle = KiROUND( vec.Angle() / M_PI_4 ) * M_PI_4;
m_end = m_origin + VECTOR2I( len, 0 ).Rotate( angle );
}
else
{
m_end = aEnd;
}
}
VECTOR2I GetEnd() const
{
return m_end;
}
void SetAngleSnap( bool aSnap )
{
m_angleSnap = aSnap;
}
private:
VECTOR2I m_origin, m_end;
bool m_angleSnap = false;
};
} // PREVIEW
} // KIGFX
#endif // PREVIEW_ITEMS_TWO_POINT_GEOMETRY_MANAGER_H
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