Method updateContentSize

YACReader/viewer.cpp:436–483

}

void Viewer::updateContentSize()
{
    // there is an image to resize
    if (currentPage != nullptr && !currentPage->isNull()) {
        QSize pagefit = currentPage->size();
        bool stretchImages = Configuration::getConfiguration().getEnlargeImages();
        YACReader::FitMode fitmode = Configuration::getConfiguration().getFitMode();
        switch (fitmode) {
        case YACReader::FitMode::FullRes:
            break;
        case YACReader::FitMode::ToWidth:
            if (!stretchImages && width() > pagefit.width()) {
                break;
            }
            pagefit.scale(width(), 0, Qt::KeepAspectRatioByExpanding);
            break;
        case YACReader::FitMode::ToHeight:
            if (!stretchImages && height() > pagefit.height()) {
                break;
            }
            pagefit.scale(0, height(), Qt::KeepAspectRatioByExpanding);
            break;
            // if everything fails showing the full page is a good idea
        case YACReader::FitMode::FullPage:
        default:
            pagefit.scale(size(), Qt::KeepAspectRatio);
            break;
        }

        if (zoom != 100) {
            pagefit.scale(floor(pagefit.width() * zoom / 100.0f), 0, Qt::KeepAspectRatioByExpanding);
        }
        // apply size to the container
        content->resize(pagefit);

        // scale the pixmap to physical pixels for crisp rendering on all displays
        auto dpr = devicePixelRatioF();
        QPixmap page = scalePixmap(*currentPage,
                                   qRound(content->width() * dpr),
                                   qRound(content->height() * dpr),
                                   Configuration::getConfiguration().getScalingMethod());
        page.setDevicePixelRatio(dpr);
        content->setPixmap(page);

        emit backgroundChanges();
    }
    content->update(); // TODO, it shouldn't be neccesary
}

void Viewer::increaseZoomFactor()
{