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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
*/
#include <preview_items/centreline_rect_item.h>
#include <preview_items/two_point_geom_manager.h>
#include <gal/graphics_abstraction_layer.h>
#include <view/view.h>
#include <trigo.h>
using namespace KIGFX::PREVIEW;
static SHAPE_POLY_SET getRectangleAlongCentreLine( const VECTOR2D& aClStart,
const VECTOR2D& aClEnd, double aAspect )
{
SHAPE_POLY_SET poly;
poly.NewOutline();
/*
* The point layout of the rectangle goes like this,
* but start/end don't have to be horz/vert
*
* 0 ---------------- 1 -----
* | | ^
* s--------cl------->e |cl|/aspect
* | | v
* 3----------------- 2 -----
*/
// vector down the centre line of the rectangle
VECTOR2D cl = aClEnd - aClStart;
// don't allow degenerate polygons
if( cl.x == 0 && cl.y == 0 )
cl.x = 1.0;
// the "side" of the rectangle is the centre line rotated by 90 deg
// and scaled by the aspect ratio
VECTOR2D side = cl;
RotatePoint( side, -ANGLE_90 );
side = side * aAspect;
VECTOR2D pt = aClStart + ( side / 2.0 );
poly.Append( pt );
pt += cl;
poly.Append( pt );
pt -= side;
poly.Append( pt );
pt -= cl;
poly.Append( pt );
return poly;
}
CENTRELINE_RECT_ITEM::CENTRELINE_RECT_ITEM( const TWO_POINT_GEOMETRY_MANAGER& aGeomMgr,
double aAspect ) :
m_geomMgr( aGeomMgr ),
m_aspect( aAspect )
{
}
SHAPE_POLY_SET CENTRELINE_RECT_ITEM::getOutline() const
{
return getRectangleAlongCentreLine( m_geomMgr.GetOrigin(), m_geomMgr.GetEnd(), m_aspect );
}
const BOX2I CENTRELINE_RECT_ITEM::ViewBBox() const
{
return getOutline().BBox();
}
void CENTRELINE_RECT_ITEM::drawPreviewShape( KIGFX::VIEW* aView ) const
{
KIGFX::GAL& gal = *aView->GetGAL();
gal.DrawLine( m_geomMgr.GetOrigin(), m_geomMgr.GetEnd() );
gal.DrawPolygon( getOutline() );
}
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