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/*
dspdfviewer - Dual Screen PDF Viewer for LaTeX-Beamer
Copyright (C) 2012 Danny Edel <mail@danny-edel.de>
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program 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 General Public License for more details.
You should have received a copy of the GNU General Public License along
with this program; if not, write to the Free Software Foundation, Inc.,
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include "hyperlinkarea.h"
#include <stdexcept>
#include <cmath>
#include <boost/math/special_functions/round.hpp>
#include "debug.h"
#include <QtGlobal>
using boost::math::iround;
HyperlinkArea::HyperlinkArea(QLabel* imageLabel, const AdjustedLink& link): QLabel(), targetPage(link.targetPageNumber())
{
if ( link.linkType() != Poppler::Link::Goto )
throw WrongLinkType();
QRect mySize;
#if QT_VERSION < QT_VERSION_CHECK(5,15,0)
// QT Version is below 5.15, which added the Return-By-Value overload.
// Handle the copy ourselves.
// FIXME: Delete this code at some point
const QPixmap *ppixmap = imageLabel->pixmap();
if ( ppixmap == nullptr)
throw std::runtime_error("imageLabel with nullptr pixmap()");
const QPixmap pixmap = QPixmap{ *ppixmap }; //copy
#else
// Qt version is at least 5.15, use Qt's own copy function.
const QPixmap pixmap = imageLabel->pixmap(Qt::ReturnByValue);
#endif
if ( pixmap.isNull() )
throw /** FIXME Exception **/ std::runtime_error("Tried to construct a HyperlinkArea from an image label without a pixmap");
QRectF sizeWithinImageLabel = link.linkArea();
mySize.setTop( iround(sizeWithinImageLabel.top() * pixmap.height()) );
mySize.setLeft( iround(sizeWithinImageLabel.left() * pixmap.width()) );
mySize.setHeight(std::abs( iround(sizeWithinImageLabel.height() * pixmap.height())) );
mySize.setWidth( iround(sizeWithinImageLabel.width() * pixmap.width()) );
setParent(imageLabel);
setGeometry(mySize);
/*
setAutoFillBackground(true);
QPalette pal = palette();
pal.setColor(QPalette::Window, QColor(Qt::black) );
setPalette(pal);
*/
// setText( QString("%1 @ +%2,%3").arg(targetPage).arg( link.linkArea().right() ). arg(link.linkArea().top()) );
show();
setCursor( Qt::PointingHandCursor );
DEBUGOUT << "Added an hyperlink to" << link.targetPageNumber() << "at" << geometry();
}
void HyperlinkArea::mousePressEvent(QMouseEvent* ev)
{
DEBUGOUT << "Hyperlink clicked" << ev << "Target page" << targetPage;
emit gotoPageRequested(targetPage);
}
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