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/*************************************************************** |
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QGVCore |
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Copyright (c) 2014, Bergont Nicolas, All rights reserved. |
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This library is free software; you can redistribute it and/or |
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modify it under the terms of the GNU Lesser General Public |
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License as published by the Free Software Foundation; either |
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version 3.0 of the License, or (at your option) any later version. |
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This library is distributed in the hope that it will be useful, |
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but WITHOUT ANY WARRANTY; without even the implied warranty of |
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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Lesser General Public License for more details. |
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You should have received a copy of the GNU Lesser General Public |
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License along with this library. |
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***************************************************************/ |
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#ifndef QGVCORE_H |
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#define QGVCORE_H |
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#include <QColor> |
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#include <QPainterPath> |
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#include <QPointF> |
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#include <QPolygonF> |
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// GraphViz headers |
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#include <cgraph.h> |
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#include <gvc.h> |
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const qreal DotDefaultDPI = 72.0; |
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/** |
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* @brief GraphViz to GraphicsScene conversions |
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* |
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*/ |
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class QGVCore { |
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public: |
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static qreal graphHeight(Agraph_t *graph); |
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static bool gvToQtPos(QString att, qreal dpi, qreal gheight, QPointF &pos); |
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static QString qtToGvPos(QPointF pos, qreal gheight); |
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static QPointF toPoint(pointf p, qreal gheight); |
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static QPointF toPoint(point p, qreal gheight); |
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static QPointF centerToOrigin(const QPointF &p, qreal width, qreal height); |
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static QPolygonF toPolygon(const polygon_t *poly, qreal width, qreal height); |
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static QPainterPath toPath(const char *type, const polygon_t *poly, |
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qreal width, qreal height); |
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static QPainterPath toPath(const splines *spl, qreal gheight); |
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static Qt::BrushStyle toBrushStyle(const QString &style); |
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static Qt::PenStyle toPenStyle(const QString &style); |
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static int toPenWidth(const QString &width); |
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static QColor toColor(const QString &color); |
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typedef struct { |
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const char *data; |
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int len; |
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int cur; |
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} rdr_t; |
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static int memiofread(void *chan, char *buf, int bufsize) { |
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const char *ptr; |
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char *optr; |
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char c; |
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int l; |
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rdr_t *s; |
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if (bufsize == 0) return 0; |
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s = (rdr_t *)chan; |
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if (s->cur >= s->len) return 0; |
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l = 0; |
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ptr = s->data + s->cur; |
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optr = buf; |
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do { |
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*optr++ = c = *ptr++; |
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l++; |
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} while (c && (c != '\n') && (l < bufsize)); |
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s->cur += l; |
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return l; |
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} |
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static Agraph_t *agmemread2(const char *cp) { |
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Agraph_t *g; |
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rdr_t rdr; |
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Agdisc_t disc; |
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Agiodisc_t memIoDisc; |
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memIoDisc.afread = memiofread; |
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memIoDisc.putstr = AgIoDisc.putstr; |
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memIoDisc.flush = AgIoDisc.flush; |
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rdr.data = cp; |
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rdr.len = strlen(cp); |
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rdr.cur = 0; |
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disc.id = &AgIdDisc; |
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disc.io = &memIoDisc; |
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g = agread(&rdr, &disc); |
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return g; |
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} |
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}; |
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#endif // QGVCORE_H |