File indexing completed on 2024-07-14 14:30:49

0001 /*
0002  * Copyright (C) 2008-2009 Fredrik Höglund <fredrik@kde.org>
0003  *
0004  * This library is free software; you can redistribute it and/or
0005  * modify it under the terms of the GNU Library General Public
0006  * License as published by the Free Software Foundation; either
0007  * version 2 of the License, or (at your option) any later version.
0008  *
0009  * This library is distributed in the hope that it will be useful,
0010  * but WITHOUT ANY WARRANTY; without even the implied warranty of
0011  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
0012  * Library General Public License for more details.
0013  *
0014  * You should have received a copy of the GNU Library General Public License
0015  * along with this library; see the file COPYING.LIB.  If not, write to
0016  * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
0017  * Boston, MA 02110-1301, USA.
0018  */
0019 
0020 #ifndef BORDERARCSTROKER_H
0021 #define BORDERARCSTROKER_H
0022 
0023 #include <QPainterPath>
0024 #include <QRect>
0025 
0026 namespace khtml
0027 {
0028 
0029 class BorderArcStroker
0030 {
0031 public:
0032     BorderArcStroker();
0033     ~BorderArcStroker();
0034 
0035     void setArc(const QRectF &r, qreal startAngle, qreal _sweepLength)
0036     {
0037         rect = r;
0038         angle = startAngle;
0039         sweepLength = _sweepLength;
0040     }
0041     void setPenWidth(qreal leftRight, qreal topBottom);
0042     void setDashPattern(qreal dashLength, qreal spaceLength);
0043     void setDashOffset(qreal offset)
0044     {
0045         patternOffset = offset;
0046     }
0047 
0048     QPainterPath createStroke(qreal *nextOffset = nullptr) const;
0049 
0050 private:
0051     QRectF rect;
0052     qreal angle;
0053     qreal hlw;
0054     qreal vlw;
0055     qreal sweepLength;
0056     qreal patternOffset;
0057     qreal pattern[2];
0058 };
0059 
0060 inline void BorderArcStroker::setPenWidth(qreal leftRight, qreal topBottom)
0061 {
0062     hlw = qMax(qreal(0.1), leftRight);
0063     vlw = qMax(qreal(0.1), topBottom);
0064 }
0065 
0066 inline void BorderArcStroker::setDashPattern(qreal dashLength, qreal spaceLength)
0067 {
0068     pattern[0] = qMax(qreal(0.1), dashLength);
0069     pattern[1] = qMax(qreal(0.1), spaceLength);
0070 }
0071 
0072 } // namespace khtml
0073 
0074 #endif