Method selectReference

src/ImageViewer.cpp:1964–2015

}

void ImageViewer::selectReference(const shared_ptr<Image>& image) {
    if (!image) {
        auto& buttons = mImageButtonContainer->children();
        for (size_t i = 0; i < buttons.size(); ++i) {
            dynamic_cast<ImageButton*>(buttons[i])->setIsReference(false);
        }

        auto& metricButtons = mMetricButtonContainer->children();
        for (size_t i = 0; i < metricButtons.size(); ++i) {
            dynamic_cast<Button*>(metricButtons[i])->set_enabled(false);
        }

        mCurrentReference = nullptr;
        mImageCanvas->setReference(nullptr);
        return;
    }

    const auto id = imageId(image).value_or(0);

    auto& buttons = mImageButtonContainer->children();
    for (size_t i = 0; i < buttons.size(); ++i) {
        dynamic_cast<ImageButton*>(buttons[i])->setIsReference(i == id);
    }

    auto& metricButtons = mMetricButtonContainer->children();
    for (size_t i = 0; i < metricButtons.size(); ++i) {
        dynamic_cast<Button*>(metricButtons[i])->set_enabled(true);
    }

    mCurrentReference = image;
    mImageCanvas->setReference(mCurrentReference);

    // Ensure the currently active reference button is always fully on-screen
    Widget* activeReferenceButton = nullptr;
    for (Widget* widget : mImageButtonContainer->children()) {
        if (dynamic_cast<ImageButton*>(widget)->isReference()) {
            activeReferenceButton = widget;
            break;
        }
    }

    if (activeReferenceButton) {
        float divisor = mScrollContent->height() - mImageScrollContainer->height();
        if (divisor > 0) {
            mImageScrollContainer->set_scroll(clamp(
                mImageScrollContainer->scroll(),
                (activeReferenceButton->position().y() + activeReferenceButton->height() - mImageScrollContainer->height()) / divisor,
                activeReferenceButton->position().y() / divisor
            ));
        }
    }
}

void ImageViewer::setExposure(float value) {
    value = round(value, 1.0f);