File indexing completed on 2024-05-05 04:35:18

 /* 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 "Painter.h"
 
 #include <tikz/core/Style.h>
 #include <tikz/core/tikz.h>
 
 #include <QPainter>
 #include <QPainterPath>
 #include <QDebug>
 
 namespace tikz {
 namespace ui {
 
 class PainterPrivate
 {
     public:
         QPainter* painter;
         tikz::core::Style* style;
 };
 
 Painter::Painter(QPainter * painter, tikz::core::Style * style)
     : d(new PainterPrivate())
 {
     d->painter = painter;
     d->style = style;
 }
 
 Painter::~Painter()
 {
     delete d;
 }
 
 /**
  * This functions returns a dash pattern for the respective pen style.
  * The generated dash pattern follows the dash patterns defined by PGF/TikZ,
  * see file generic/pgf/frontendlayer/tikz/tikz.code.tex fur further details.
  *
  * If @p style has a tikz::PenStyle::SolidLine as pen style, an empty vector is returned.
  */
 static QVector<qreal> penStyle(qreal lineWidth, tikz::PenStyle style)
 {
     //
     // NOTE: all calculations have the unit 'pt'
     //
     QVector<qreal> pattern;
     switch (style) {
         case tikz::PenStyle::SolidLine: break; // leave empty
         case tikz::PenStyle::DottedLine: pattern << lineWidth*lineWidth << 2; break;
         case tikz::PenStyle::DenselyDottedLine: pattern << lineWidth*lineWidth << 1; break;
         case tikz::PenStyle::LooselyDottedLine: pattern << lineWidth*lineWidth << 4; break;
         case tikz::PenStyle::DashedLine: pattern << 3 << 3; break;
         case tikz::PenStyle::DenselyDashedLine: pattern << 3 << 2; break;
         case tikz::PenStyle::LooselyDashedLine: pattern << 3 << 6; break;
         case tikz::PenStyle::DashDottedLine: pattern << 3 << 2 << lineWidth << 2; break;
         case tikz::PenStyle::DenselyDashDottedLine: pattern << 3 << 1 << lineWidth*lineWidth << 1; break;
         case tikz::PenStyle::LooselyDashDottedLine: pattern << 3 << 4 << lineWidth*lineWidth << 4; break;
         case tikz::PenStyle::DashDotDottedLine: pattern << 3 << 2 << lineWidth*lineWidth << 2 << lineWidth*lineWidth << 2; break;
         case tikz::PenStyle::DenselyDashDotDottedLine: pattern << 3 << 1 << lineWidth*lineWidth << 1 << lineWidth*lineWidth << 1; break;
         case tikz::PenStyle::LooselyDashDotDottedLine: pattern << 3 << 4 << lineWidth*lineWidth << 4 << lineWidth*lineWidth << 4; break;
         default: break;
     }
 
     for (int i = 0; i < pattern.size(); ++i) {
         pattern[i] /= lineWidth;
     }
     return pattern;
 }
 
 QPen Painter::pen() const
 {
     // invalid color -> NoPen
     QColor c = d->style->penColor();
     if (!c.isValid()) {
         return Qt::NoPen;
     }
 
     // construct valid pen
     QPen pen(c);
     pen.setWidthF(d->style->penWidth().toPoint());
     pen.setCapStyle(Qt::FlatCap);
     pen.setJoinStyle(Qt::MiterJoin);
 //    setMiterLimit
     return pen;
 }
 
 void Painter::drawPath(const QPainterPath & path)
 {
     QPen p = pen();
 
     p.setWidthF(d->style->penWidth().toPoint());
     QVector<qreal> pattern = tikz::ui::penStyle(d->style->penWidth().toPoint(), d->style->penStyle());
     if (d->style->penStyle() != tikz::PenStyle::SolidLine) {
         p.setDashPattern(pattern);
     }
 
     // first pass: draw line
     d->painter->setPen(p);
     d->painter->setBrush(Qt::NoBrush);
     d->painter->setOpacity(d->style->penOpacity());
     d->painter->drawPath(path);
 
     // second pass: draw inner line
     if (d->style->doubleLine() && d->style->innerLineWidth().toPoint() > 0) {
         if (d->style->penStyle() != tikz::PenStyle::SolidLine) {
             // scale by different line widths to match distances
             for (int i = 0; i < pattern.size(); ++i) {
                 pattern[i] *= d->style->penWidth().toPoint() / d->style->innerLineWidth().toPoint();
             }
             p.setDashPattern(pattern);
         }
 
         p.setWidthF(d->style->innerLineWidth().toPoint());
         p.setColor(d->style->innerLineColor());
         d->painter->setPen(p);
         d->painter->drawPath(path);
     }
 }
 
 void Painter::fillPath(const QPainterPath & path)
 {
     // shortcut: only paint if required
     if (d->style->fillColor().alpha() == 0 || d->style->fillOpacity() == 0.0) {
         return;
     }
 
     QPen p = pen();
     p.setColor(Qt::transparent);
     p.setWidthF(d->style->penWidth().toPoint());
 
     const QBrush brush(d->style->fillColor());
 
     d->painter->setPen(p);
     d->painter->setBrush(brush);
     d->painter->setOpacity(d->style->fillOpacity());
     d->painter->fillPath(path, brush);
 }
 
 }
 }
 
 // kate: indent-width 4; replace-tabs on;