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 /* This file is part of the TikZKit project.
  *
  * Copyright (C) 2013 Dominik Haumann <dhaumann@kde.org>
  *
  * This library is free software; you can redistribute it and/or modify
  * it under the terms of the GNU Library General Public License as published
  * by the Free Software Foundation, either version 2 of the License, or
  * (at your option) any later version.
  *
  * This library 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 Library General Public License for more details.
  *
  * You should have received a copy of the GNU Library General Public License
  * along with this library; see the file COPYING.LIB.  If not, see
  * <http://www.gnu.org/licenses/>.
  */
 
 #include "ToArrow.h"
 
 #include <tikz/core/Style.h>
 
 #include <QPainter>
 
 #include <cmath>
 
 class ToArrowPrivate
 {
     public:
 };
 
 ToArrow::ToArrow(tikz::core::Style * style)
     : AbstractArrow(style)
     , d(new ToArrowPrivate())
 {
 }
 
 ToArrow::~ToArrow()
 {
     delete d;
 }
 
 tikz::Arrow ToArrow::type() const
 {
     return tikz::Arrow::ToArrow;
 }
 
 QString ToArrow::name() const
 {
     return QObject::tr("to");
 }
 
 qreal ToArrow::leftExtend() const
 {
     // see: pgfcorearrows.code.tex; 0.84pt
     return -0.84 - 1.3 * style()->penWidth().toPoint();
 }
 
 qreal ToArrow::rightExtend() const
 {
     // see: pgfcorearrows.code.tex; 0.21pt
     return 0.21 + 0.625 * style()->penWidth().toPoint();
 }
 
 void ToArrow::draw(QPainter* painter) const
 {
     // see: pgfcorearrows.code.tex
     QPainterPath p = path();
     painter->save();
     QPen pen = painter->pen();
     pen.setWidthF(0.8 * style()->penWidth().toPoint());
     pen.setColor(style()->penColor());
     pen.setCapStyle(Qt::RoundCap);
     pen.setJoinStyle(Qt::RoundJoin);
     painter->setPen(pen);
     painter->setBrush(Qt::NoBrush);
     painter->drawPath(p);
     painter->restore();
 }
 
 QPainterPath ToArrow::path() const
 {
     // see: pgfcorearrows.code.tex
     QPainterPath path;
 
     const qreal dima = tikz::Value(0.28).toPoint() + 0.3 * style()->penWidth().toPoint();
     path.moveTo(dima * QPointF(-3, 4));
     path.cubicTo(dima * QPointF(-2.75, 2.5),
                  dima * QPointF(0.0, 0.25),
                  dima * QPointF(0.75, 0.0));
     path.cubicTo(dima * QPointF(0.0, -0.25),
                  dima * QPointF(-2.75, -2.5),
                  dima * QPointF(-3, -4));
     return path;
 }
 
 QPainterPath ToArrow::contour(qreal width) const
 {
     QPainterPathStroker stroker;
     stroker.setJoinStyle(Qt::RoundJoin);
     stroker.setCapStyle(Qt::RoundCap);
     stroker.setWidth(width + style()->penWidth().toPoint());
 
     return stroker.createStroke(path());
 }
 
 
 
 
 class ReversedToArrowPrivate
 {
     public:
 };
 
 ReversedToArrow::ReversedToArrow(tikz::core::Style * style)
     : AbstractArrow(style)
     , d(new ReversedToArrowPrivate())
 {
 }
 
 ReversedToArrow::~ReversedToArrow()
 {
     delete d;
 }
 
 tikz::Arrow ReversedToArrow::type() const
 {
     return tikz::Arrow::ReversedToArrow;
 }
 
 QString ReversedToArrow::name() const
 {
     return QObject::tr("to reversed");
 }
 
 qreal ReversedToArrow::leftExtend() const
 {
     // see: pgfcorearrows.code.tex
     return -0.21 - 0.475 * style()->penWidth().toPoint();
 }
 
 qreal ReversedToArrow::rightExtend() const
 {
     // see: pgfcorearrows.code.tex
     return 0.98 + 1.45 * style()->penWidth().toPoint();
 }
 
 void ReversedToArrow::draw(QPainter* painter) const
 {
     // see: pgfcorearrows.code.tex
     QPainterPath p = path();
     painter->save();
     QPen pen = painter->pen();
     pen.setWidthF(0.8 * style()->penWidth().toPoint());
     pen.setColor(style()->penColor());
     pen.setCapStyle(Qt::RoundCap);
     pen.setJoinStyle(Qt::RoundJoin);
     painter->setPen(pen);
     painter->setBrush(Qt::NoBrush);
     painter->drawPath(p);
     painter->restore();
 }
 
 QPainterPath ReversedToArrow::path() const
 {
     // see: pgfcorearrows.code.tex
     QPainterPath path;
 
     const qreal dima = 0.28 + 0.3 * style()->penWidth().toPoint();
     path.moveTo(dima * QPointF(3.5, 4));
     path.cubicTo(dima * QPointF(3.25, 2.5),
                  dima * QPointF(0.5, 0.25),
                  dima * QPointF(-0.25, 0.0));
     path.cubicTo(dima * QPointF(0.5, -0.25),
                  dima * QPointF(3.25, -2.5),
                  dima * QPointF(3.5, -4));
     return path;
 }
 
 QPainterPath ReversedToArrow::contour(qreal width) const
 {
     QPainterPathStroker stroker;
     stroker.setJoinStyle(Qt::RoundJoin);
     stroker.setCapStyle(Qt::RoundCap);
     stroker.setWidth(width + style()->penWidth().toPoint());
 
     return stroker.createStroke(path());
 }
 
 // kate: indent-width 4; replace-tabs on;