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Viewing changes to lib/print/printhelper.cpp

  • Committer: Package Import Robot
  • Author(s): Jonathan Riddell
  • Date: 2011-12-15 14:17:54 UTC
  • mto: This revision was merged to the branch mainline in revision 12.
  • Revision ID: package-import@ubuntu.com-20111215141754-z043hyx69dulbggf
Tags: upstream-4.7.90
Import upstream version 4.7.90

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lib/print/printhelper.cpp
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// vim: set tabstop=4 shiftwidth=4 noexpandtab:
 
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// 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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// Local
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#include "printoptionspage.h"
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namespace Gwenview {
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namespace Gwenview
 
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{
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struct PrintHelperPrivate {
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        QWidget* mParent;
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        QSize adjustSize(PrintOptionsPage* optionsPage, Document::Ptr doc, int printerResolution, const QSize & viewportSize) {
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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 =
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                                size.width() > viewportSize.width()
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                                || 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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                        int dpmX = doc->image().dotsPerMeterX();
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                        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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                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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    QWidget* mParent;
 
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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 =
 
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                size.width() > viewportSize.width()
 
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                || 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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            int dpmX = doc->image().dotsPerMeterX();
 
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            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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};
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PrintHelper::PrintHelper(QWidget* parent)
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: d(new PrintHelperPrivate) {
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        d->mParent = parent;
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}
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PrintHelper::~PrintHelper() {
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        delete d;
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}
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void PrintHelper::print(Document::Ptr doc) {
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        doc->startLoadingFullImage();
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        doc->waitUntilLoaded();
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        QPrinter printer;
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        PrintOptionsPage* optionsPage = new PrintOptionsPage(doc->size());
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        optionsPage->loadConfig();
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        std::auto_ptr<QPrintDialog> dialog(
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                KdePrint::createPrintDialog(&printer,
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                        QList<QWidget*>() << optionsPage,
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                        d->mParent)
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                );
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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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        QPainter painter(&printer);
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        QRect rect = painter.viewport();
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        QSize size = d->adjustSize(optionsPage, doc, printer.resolution(), rect.size());
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        QPoint pos = d->adjustPosition(optionsPage, size, rect.size());
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        painter.setViewport(pos.x(), pos.y(), size.width(), size.height());
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        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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: d(new PrintHelperPrivate)
 
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{
 
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    d->mParent = parent;
 
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}
 
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PrintHelper::~PrintHelper()
 
112
{
 
113
    delete d;
 
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}
 
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116
void PrintHelper::print(Document::Ptr doc)
 
117
{
 
118
    doc->startLoadingFullImage();
 
119
    doc->waitUntilLoaded();
 
120
    QPrinter printer;
 
121
 
 
122
    PrintOptionsPage* optionsPage = new PrintOptionsPage(doc->size());
 
123
    optionsPage->loadConfig();
 
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125
    std::auto_ptr<QPrintDialog> dialog(
 
126
        KdePrint::createPrintDialog(&printer,
 
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                                    QList<QWidget*>() << optionsPage,
 
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                                    d->mParent)
 
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    );
 
130
    dialog->setWindowTitle(i18n("Print Image"));
 
131
    bool wantToPrint = dialog->exec();
 
132
 
 
133
    optionsPage->saveConfig();
 
134
    if (!wantToPrint) {
 
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        return;
 
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    }
 
137
 
 
138
    QPainter painter(&printer);
 
139
    QRect rect = painter.viewport();
 
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    QSize size = d->adjustSize(optionsPage, doc, printer.resolution(), rect.size());
 
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    QPoint pos = d->adjustPosition(optionsPage, size, rect.size());
 
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    painter.setViewport(pos.x(), pos.y(), size.width(), size.height());
 
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144
    QImage image = doc->image();
 
145
    painter.setWindow(image.rect());
 
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    painter.drawImage(0, 0, image);
 
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}
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} // namespace