#ifndef DIALOGIMAGEVIEWER_H
#define DIALOGIMAGEVIEWER_H

#include <QDialog>
#include <QImage>
#include <QLabel>
#include <QScrollArea>
#include <QWheelEvent>

/**
 * @brief 图像查看对话框
 * 支持滚轮缩放、拖拽平移、双击还原
 */
class DialogImageViewer : public QDialog
{
    Q_OBJECT

public:
    explicit DialogImageViewer(QWidget* parent = nullptr);
    ~DialogImageViewer();

    /**
     * @brief 设置要显示的图像
     * @param image 图像
     * @param title 标题
     */
    void setImage(const QImage& image, const QString& title = "");

protected:
    void wheelEvent(QWheelEvent* event) override;
    void mousePressEvent(QMouseEvent* event) override;
    void mouseMoveEvent(QMouseEvent* event) override;
    void mouseReleaseEvent(QMouseEvent* event) override;
    void mouseDoubleClickEvent(QMouseEvent* event) override;
    void keyPressEvent(QKeyEvent* event) override;

private:
    void setupUI();
    void updateImageDisplay();
    void resetZoom();

private:
    QScrollArea* m_scrollArea = nullptr;
    QLabel* m_imageLabel = nullptr;
    QLabel* m_infoLabel = nullptr;
    QImage m_originalImage;
    double m_scaleFactor = 1.0;
    bool m_dragging = false;
    QPoint m_lastPos;

    static constexpr double MIN_SCALE = 0.1;
    static constexpr double MAX_SCALE = 10.0;
    static constexpr double SCALE_STEP = 0.1;
};

#endif // DIALOGIMAGEVIEWER_H