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//
// Copyright (C) 2021-2022 David Cosgrove and other RDKit contributors
//
// @@ 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 (CozChemIx Limited)
//
#include <GraphMol/MolDraw2D/DrawAnnotation.h>
#include <GraphMol/MolDraw2D/DrawText.h>
#include <GraphMol/MolDraw2D/MolDraw2D.h>
namespace RDKit {
namespace MolDraw2D_detail {
// ****************************************************************************
DrawAnnotation::DrawAnnotation(const std::string ¬e,
const TextAlignType &align,
const std::string &cls, double relFontScale,
const Point2D &pos, const DrawColour &colour,
DrawText &textDrawer)
: text_(note),
align_(align),
class_(cls),
textDrawer_(textDrawer),
pos_(pos),
colour_(colour) {
fontScale_ = relFontScale * textDrawer_.fontScale();
extractRects();
}
// ****************************************************************************
void DrawAnnotation::findExtremes(double &xmin, double &xmax, double &ymin,
double &ymax, double padding) const {
if (text_.empty()) {
return;
}
Point2D tl, tr, br, bl, otrans;
for (auto r : rects_) {
otrans = r->trans_;
r->trans_ += pos_;
r->calcCorners(tl, tr, br, bl, padding);
// sometimes the rect is in a coordinate frame where +ve y is down,
// sometimes it's up. For these purposes, we don't care so long as
// the ymax is larger than the ymin. We probably don't need to do
// all the tests for xmin and xmax;
xmin = std::min({tr.x, bl.x, xmin});
ymin = std::min({tr.y, bl.y, ymin});
xmax = std::max({tr.x, bl.x, xmax});
ymax = std::max({tr.y, bl.y, ymax});
r->trans_ = otrans;
}
}
// ****************************************************************************
void DrawAnnotation::getDimensions(double &width, double &height) const {
double xMin, yMin, xMax, yMax;
xMin = yMin = std::numeric_limits<double>::max();
xMax = yMax = std::numeric_limits<double>::lowest();
findExtremes(xMin, xMax, yMin, yMax);
width = xMax - xMin;
height = yMax - yMin;
}
// ****************************************************************************
void DrawAnnotation::extractRects() {
// We don't need these for notes, which are always on 1 line and plain
// text.
std::vector<TextDrawType> drawModes;
std::vector<char> drawChars;
double ofs = textDrawer_.fontScale();
textDrawer_.setFontScale(fontScale_, true);
fontScale_ = textDrawer_.fontScale();
textDrawer_.getStringRects(text_, OrientType::C, rects_, drawModes, drawChars,
true, align_);
textDrawer_.setFontScale(ofs, true);
}
// ****************************************************************************
void DrawAnnotation::draw(MolDraw2D &molDrawer) const {
std::string o_class = molDrawer.getActiveClass();
std::string actClass = o_class;
if (!actClass.empty()) {
actClass += " ";
}
actClass += class_;
molDrawer.setActiveClass(actClass);
textDrawer_.setColour(colour_);
double ofs = textDrawer_.fontScale();
textDrawer_.setFontScale(fontScale_, true);
textDrawer_.drawString(text_, pos_, align_);
textDrawer_.setFontScale(ofs, true);
molDrawer.setActiveClass(o_class);
// drawRects(molDrawer);
}
// ****************************************************************************
void DrawAnnotation::drawRects(MolDraw2D &molDrawer) const {
auto olw = molDrawer.lineWidth();
molDrawer.setLineWidth(1);
Point2D tl, tr, br, bl, origTrans;
for (auto &rect : rects_) {
origTrans = rect->trans_;
rect->trans_ += pos_;
rect->calcCorners(tl, tr, br, bl, 0.0);
molDrawer.setColour(DrawColour(1.0, 0.0, 0.0));
molDrawer.drawLine(tl, tr, true);
molDrawer.setColour(DrawColour(0.0, 1.0, 0.0));
molDrawer.drawLine(tr, br, true);
molDrawer.setColour(DrawColour(0.0, 0.0, 1.0));
molDrawer.drawLine(br, bl, true);
molDrawer.setColour(DrawColour(0.0, 0.95, 0.95));
molDrawer.drawLine(bl, tl, true);
rect->trans_ = origTrans;
}
molDrawer.setLineWidth(olw);
}
// ****************************************************************************
void DrawAnnotation::scale(const Point2D &scaleFactor) {
pos_.x *= scaleFactor.x;
pos_.y *= scaleFactor.y;
// arbitrarily choose x scale for fonts. It is highly unlikely that the
// x and y are different, in any case.
fontScale_ *= scaleFactor.x;
// rebuild the rectangles, because the fontScale may be different,
// and the widths etc might not scale by the same amount.
rects_.clear();
extractRects();
}
// ****************************************************************************
void DrawAnnotation::move(const Point2D &trans) {
pos_ += trans;
// the internals of the rects_ are all relative to pos_, so no need to
// do anything to them.
}
// ****************************************************************************
bool DrawAnnotation::doesRectClash(const StringRect &rect,
double padding) const {
for (auto &alrect : rects_) {
auto oldTrans = alrect->trans_;
alrect->trans_ += pos_;
bool dii = alrect->doesItIntersect(rect, padding);
alrect->trans_ = oldTrans;
if (dii) {
return true;
}
}
return false;
}
} // namespace MolDraw2D_detail
} // namespace RDKit
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