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//
// @@ All Rights Reserved @@
// This file is part of the RDKit.
// The contents are covered by the terms of the BSD license
// which is included in the file license.txt, found at the root
// of the RDKit source tree.
//
// Original author: David Cosgrove (AstraZeneca)
// 19th June 2014
//
#include "MolDraw2DQt.h"
#include <GraphMol/MolDraw2D/MolDraw2DDetails.h>
#include <QPainter>
#include <QPainterPath>
#include <QString>
#ifdef RDK_BUILD_FREETYPE_SUPPORT
#include "DrawTextFTQt.h"
#else
#include "DrawTextQt.h"
#endif
namespace RDKit {
const char *rdkitQtVersion = RDK_QT_VERSION;
// ****************************************************************************
MolDraw2DQt::MolDraw2DQt(int width, int height, QPainter *qp, int panelWidth,
int panelHeight, bool noFreetype)
: MolDraw2D(width, height, panelWidth, panelHeight), d_qp(qp) {
PRECONDITION(width > 0, "bad width");
PRECONDITION(height > 0, "bad height");
initDrawing();
initTextDrawer(noFreetype);
}
void MolDraw2DQt::initDrawing() {
d_qp->setRenderHint(QPainter::RenderHint::Antialiasing);
}
void MolDraw2DQt::initTextDrawer(bool noFreetype) {
double max_fnt_sz = drawOptions().maxFontSize;
double min_fnt_sz = drawOptions().minFontSize;
if (noFreetype) {
text_drawer_.reset(
new MolDraw2D_detail::DrawTextQt(max_fnt_sz, min_fnt_sz, d_qp));
} else {
#ifdef RDK_BUILD_FREETYPE_SUPPORT
try {
text_drawer_.reset(new MolDraw2D_detail::DrawTextFTQt(
max_fnt_sz, min_fnt_sz, drawOptions().fontFile, d_qp));
} catch (std::runtime_error &e) {
BOOST_LOG(rdWarningLog)
<< e.what() << std::endl
<< "Falling back to native Qt text handling." << std::endl;
text_drawer_.reset(
new MolDraw2D_detail::DrawTextQt(max_fnt_sz, min_fnt_sz, d_qp));
}
#else
text_drawer_.reset(
new MolDraw2D_detail::DrawTextQt(max_fnt_sz, min_fnt_sz, d_qp));
#endif
}
if (drawOptions().baseFontSize > 0.0) {
text_drawer_->setBaseFontSize(drawOptions().baseFontSize);
}
}
// ****************************************************************************
void MolDraw2DQt::setColour(const DrawColour &col) {
MolDraw2D::setColour(col);
QColor this_col(int(255.0 * col.r), int(255.0 * col.g), int(255.0 * col.b),
int(255.0 * col.a));
QPen pen(this_col);
pen.setJoinStyle(Qt::RoundJoin);
d_qp->setPen(pen);
QBrush brush(this_col);
brush.setStyle(Qt::SolidPattern);
d_qp->setBrush(brush);
}
namespace {
void setDashes(QPen &pen, const DashPattern &dashes) {
if (dashes.size()) {
QVector<qreal> dd;
for (unsigned int di = 0; di < dashes.size(); ++di) dd << dashes[di];
pen.setDashPattern(dd);
} else {
pen.setStyle(Qt::SolidLine);
pen.setCapStyle(Qt::FlatCap);
}
}
} // namespace
// ****************************************************************************
void MolDraw2DQt::drawLine(const Point2D &cds1, const Point2D &cds2,
bool rawCoords) {
Point2D c1 = rawCoords ? cds1 : getDrawCoords(cds1);
Point2D c2 = rawCoords ? cds2 : getDrawCoords(cds2);
QPen pen = d_qp->pen();
setDashes(pen, dash());
pen.setWidth(getDrawLineWidth());
d_qp->setPen(pen);
d_qp->drawLine(QPointF(c1.x, c1.y), QPointF(c2.x, c2.y));
}
// ****************************************************************************
// draw the char, with the bottom left hand corner at cds
void MolDraw2DQt::drawChar(char c, const Point2D &cds) {
QRectF br = d_qp->boundingRect(0, 0, 100, 100,
Qt::AlignLeft | Qt::AlignBottom, QString(c));
d_qp->drawText(QRectF(cds.x, cds.y - br.height(), br.width(), br.height()),
Qt::AlignLeft | Qt::AlignBottom, QString(c), &br);
}
// ****************************************************************************
void MolDraw2DQt::drawPolygon(const std::vector<Point2D> &cds, bool rawCoords) {
PRECONDITION(cds.size() >= 3, "must have at least three points");
QPointF *points = new QPointF[cds.size()];
for (unsigned int i = 0; i < cds.size(); ++i) {
Point2D lc = rawCoords ? cds[i] : getDrawCoords(cds[i]);
points[i] = QPointF(lc.x, lc.y);
}
QPen pen = d_qp->pen();
setDashes(pen, dash());
pen.setStyle(Qt::SolidLine);
pen.setCapStyle(Qt::FlatCap);
pen.setWidth(getDrawLineWidth());
if (fillPolys()) {
d_qp->save();
d_qp->setPen(pen);
QBrush brush = d_qp->brush();
brush.setStyle(Qt::SolidPattern);
d_qp->setBrush(brush);
d_qp->drawConvexPolygon(points, cds.size());
d_qp->restore();
} else {
QPainterPath path;
path.moveTo(points[0]);
for (unsigned int i = 0; i < cds.size(); ++i) {
path.lineTo(points[i]);
}
d_qp->strokePath(path, pen);
}
delete[] points;
}
// ****************************************************************************
void MolDraw2DQt::drawWavyLine(const Point2D &cds1, const Point2D &cds2,
const DrawColour &col1, const DrawColour &,
unsigned int nSegments, double vertOffset,
bool rawCoords) {
PRECONDITION(nSegments > 1, "too few segments");
auto segments =
MolDraw2D_detail::getWavyLineSegments(cds1, cds2, nSegments, vertOffset);
QPen pen = d_qp->pen();
pen.setStyle(Qt::SolidLine);
pen.setCapStyle(Qt::FlatCap);
pen.setWidth(getDrawLineWidth());
setColour(col1);
QPainterPath path;
auto c1 = std::get<0>(segments[0]);
c1 = rawCoords ? c1 : getDrawCoords(c1);
path.moveTo(QPointF(c1.x, c1.y));
for (unsigned int i = 0; i < nSegments; ++i) {
auto cpt1 = std::get<1>(segments[i]);
cpt1 = rawCoords ? cpt1 : getDrawCoords(cpt1);
auto cpt2 = std::get<2>(segments[i]);
cpt2 = rawCoords ? cpt2 : getDrawCoords(cpt2);
auto segpt = std::get<3>(segments[i]);
segpt = rawCoords ? segpt : getDrawCoords(segpt);
path.cubicTo(QPointF(cpt1.x, cpt1.y), QPointF(cpt2.x, cpt2.y),
QPointF(segpt.x, segpt.y));
}
d_qp->strokePath(path, pen);
}
// ****************************************************************************
void MolDraw2DQt::clearDrawing() {
MolDraw2D::clearDrawing();
QColor this_col(int(255.0 * drawOptions().backgroundColour.r),
int(255.0 * drawOptions().backgroundColour.g),
int(255.0 * drawOptions().backgroundColour.b),
int(255.0 * drawOptions().backgroundColour.a));
d_qp->setBackground(QBrush(this_col));
d_qp->fillRect(offset().x, offset().y, width(), height(), this_col);
}
} // namespace RDKit
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