178 lines
5.5 KiB
C++
178 lines
5.5 KiB
C++
// vim: set tabstop=4 shiftwidth=4 expandtab:
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/*
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Gwenview: an image viewer
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Copyright 2007 Aurélien Gâteau <agateau@kde.org>
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This program is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public License
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as published by the Free Software Foundation; either version 2
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of the License, or (at your option) any later version.
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This program 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
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*/
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// Self
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#include "printhelper.h"
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// STD
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#include <memory>
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// Qt
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#include <QCheckBox>
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#include <QPainter>
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#include <QPrintDialog>
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#include <QPrintPreviewDialog>
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#include <QPrinter>
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#include <QUrl>
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// KF
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#include <KLocalizedString>
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// Local
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#include "printoptionspage.h"
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namespace Gwenview
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{
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struct PrintHelperPrivate {
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QWidget *mParent = nullptr;
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QSize adjustSize(PrintOptionsPage *optionsPage, Document::Ptr doc, int printerResolution, const QSize &viewportSize)
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{
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QSize size = doc->size();
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PrintOptionsPage::ScaleMode scaleMode = optionsPage->scaleMode();
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if (scaleMode == PrintOptionsPage::ScaleToPage) {
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bool imageBiggerThanPaper = size.width() > viewportSize.width() || size.height() > viewportSize.height();
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if (imageBiggerThanPaper || optionsPage->enlargeSmallerImages()) {
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size.scale(viewportSize, Qt::KeepAspectRatio);
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}
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} else if (scaleMode == PrintOptionsPage::ScaleToCustomSize) {
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double wImg = optionsPage->scaleWidth();
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double hImg = optionsPage->scaleHeight();
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size.setWidth(int(wImg * printerResolution));
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size.setHeight(int(hImg * printerResolution));
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} else {
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// No scale
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const double INCHES_PER_METER = 100. / 2.54;
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const int dpmX = doc->image().dotsPerMeterX();
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const int dpmY = doc->image().dotsPerMeterY();
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if (dpmX > 0 && dpmY > 0) {
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double wImg = double(size.width()) / double(dpmX) * INCHES_PER_METER;
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double hImg = double(size.height()) / double(dpmY) * INCHES_PER_METER;
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size.setWidth(int(wImg * printerResolution));
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size.setHeight(int(hImg * printerResolution));
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}
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}
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return size;
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}
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QPoint adjustPosition(PrintOptionsPage *optionsPage, const QSize &imageSize, const QSize &viewportSize)
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{
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Qt::Alignment alignment = optionsPage->alignment();
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int posX, posY;
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if (alignment & Qt::AlignLeft) {
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posX = 0;
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} else if (alignment & Qt::AlignHCenter) {
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posX = (viewportSize.width() - imageSize.width()) / 2;
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} else {
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posX = viewportSize.width() - imageSize.width();
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}
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if (alignment & Qt::AlignTop) {
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posY = 0;
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} else if (alignment & Qt::AlignVCenter) {
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posY = (viewportSize.height() - imageSize.height()) / 2;
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} else {
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posY = viewportSize.height() - imageSize.height();
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}
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return QPoint(posX, posY);
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}
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void setupPrinter(QPrinter *printer, Document::Ptr doc)
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{
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doc->waitUntilLoaded();
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printer->setDocName(doc->url().fileName());
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const auto docSize = doc->size();
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printer->setPageOrientation(docSize.width() > docSize.height() ? QPageLayout::Landscape : QPageLayout::Portrait);
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}
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void print(QPrinter *printer, Document::Ptr doc, bool showPrinterSetupDialog)
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{
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auto optionsPage = new PrintOptionsPage(doc->size());
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optionsPage->loadConfig();
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QScopedPointer<QPrintDialog> dialog;
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if (showPrinterSetupDialog) {
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dialog.reset(new QPrintDialog(printer, mParent));
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#if defined(Q_OS_UNIX) && !defined(Q_OS_DARWIN)
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dialog->setOptionTabs(QList<QWidget *>() << optionsPage);
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#else
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optionsPage->setParent(dialog.data());
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#endif
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dialog->setWindowTitle(i18n("Print Image"));
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bool wantToPrint = dialog->exec();
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optionsPage->saveConfig();
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if (!wantToPrint) {
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return;
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}
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}
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QPainter painter(printer);
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const QRect rect = painter.viewport();
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const QSize size = adjustSize(optionsPage, doc, printer->resolution(), rect.size());
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const QPoint pos = adjustPosition(optionsPage, size, rect.size());
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painter.setViewport(pos.x(), pos.y(), size.width(), size.height());
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if (!dialog) {
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delete optionsPage;
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}
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const QImage image = doc->image();
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painter.setWindow(image.rect());
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painter.drawImage(0, 0, image);
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}
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};
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PrintHelper::PrintHelper(QWidget *parent)
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: d(new PrintHelperPrivate)
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{
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d->mParent = parent;
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}
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PrintHelper::~PrintHelper()
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{
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delete d;
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}
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void PrintHelper::print(Document::Ptr doc)
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{
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QPrinter printer;
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d->setupPrinter(&printer, doc);
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d->print(&printer, doc, true);
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}
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void PrintHelper::printPreview(Document::Ptr doc)
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{
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QPrinter printer;
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d->setupPrinter(&printer, doc);
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QPrintPreviewDialog dlg(&printer, d->mParent);
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QObject::connect(&dlg, &QPrintPreviewDialog::paintRequested, [this, doc](QPrinter *printer) {
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d->print(printer, doc, false);
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});
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dlg.exec();
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}
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} // namespace
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