// 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/JFJochFollowerImage.h"

#include <QShowEvent>

JFJochMagnifierWindow::JFJochMagnifierWindow(QWidget *parent)
    : JFJochHelperWindow(parent) {
    setWindowTitle("Magnifier");
    m_image = new JFJochFollowerImage(this);
    setCentralWidget(m_image);
    resize(320, 320);
}

void JFJochMagnifierWindow::setFrame(std::shared_ptr<const QImage> frame) {
    // Just a pointer assignment plus an update() that a hidden window never acts on, so this
    // needs no visibility guard: there is nothing expensive left to skip.
    m_image->SetFrame(std::move(frame));
}

void JFJochMagnifierWindow::imageLoaded(std::shared_ptr<const JFJochReaderImage> image) {
    m_image->SetPixelValues(std::move(image));
}

void JFJochMagnifierWindow::centerAt(QPointF scenePos) {
    m_last_scene_pos = scenePos;
    if (!isVisible())
        return;
    m_image->CenterAt(scenePos);
}

void JFJochMagnifierWindow::showEvent(QShowEvent *event) {
    JFJochHelperWindow::showEvent(event);
    // setFrame keeps the pixels current while hidden, but the centre does not move, so without this
    // the window re-opens showing wherever the cursor happened to be when it was closed.
    if (m_last_scene_pos)
        m_image->CenterAt(*m_last_scene_pos);
}