Jungfraujoch/viewer/windows/JFJochMagnifierWindow.cpp

// SPDX-FileCopyrightText: 2026 Filip Leonarski, Paul Scherrer Institute <filip.leonarski@psi.ch>
// SPDX-License-Identifier: GPL-3.0-only

#include "JFJochMagnifierWindow.h"
#include "../image_viewer/JFJochSimpleImage.h"
#include "../SimpleImage.h"

#include <QTransform>

JFJochMagnifierWindow::JFJochMagnifierWindow(QWidget *parent)
    : JFJochHelperWindow(parent) {
    setWindowTitle("Magnifier");
    m_image = new JFJochSimpleImage(this);
    m_image->setZoom(m_magnification);
    setCentralWidget(m_image);
    resize(320, 320);
}

void JFJochMagnifierWindow::imageLoaded(std::shared_ptr<const JFJochReaderImage> image) {
    if (!image) {
        m_have_image = false;
        m_image->setImage(nullptr);
        return;
    }

    const double scale = m_have_image ? m_image->GetScaleFactor() : m_magnification;
    const QPointF center = m_have_image
                           ? m_image->mapToScene(m_image->viewport()->rect().center())
                           : QPointF(image->Dataset().experiment.GetXPixelsNum() * 0.5,
                                     image->Dataset().experiment.GetYPixelsNum() * 0.5);

    const auto &exp = image->Dataset().experiment;
    auto si = std::make_shared<SimpleImage>();
    si->image = CompressedImage(image->Image(), exp.GetXPixelsNum(), exp.GetYPixelsNum());
    m_image->setImage(si);
    m_image->applyViewport(QTransform::fromScale(scale, scale), center);
    m_have_image = true;
}

void JFJochMagnifierWindow::centerAt(QPointF scenePos) {
    if (!m_have_image || !isVisible())
        return;
    double scale = m_image->GetScaleFactor();
    m_image->applyViewport(QTransform::fromScale(scale, scale), scenePos);
}