painted_image_item.h

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#pragma once
 
#include <QQuickPaintedItem>
#include <QImage>
 
#include "rendering/base_image_item.h"
 
namespace CaptureMoment::UI {
 
namespace Rendering {
 
class PaintedImageItem : public QQuickPaintedItem, public BaseImageItem {
 
    Q_OBJECT
 
private:
    QImage m_current_qimage;
 
public:
    explicit PaintedImageItem(QQuickItem* parent = nullptr);
    
    ~PaintedImageItem() = default;
    
    void setImage(std::unique_ptr<Core::Common::ImageRegion> image) override;
    
    void updateTile(std::unique_ptr<Core::Common::ImageRegion> tile) override;
 
protected:
    // QQuickPaintedItem override
    void paint(QPainter* painter) override;
 
        /*
     * @brief Handlers for state changes (zoom, pan, image).
     * These methods are called when the corresponding state changes (zoom, pan, image).
     * They can be overridden to react to changes, but the base implementation does nothing.
     */
    void onZoomChanged(float new_zoom) override;
 
    /*
     * @brief Handler for pan changes.
     * This method is called when the pan offset changes.
     * The base implementation does nothing, but it can be overridden to react to pan changes.
     */
    void onPanChanged(const QPointF& new_pan) override;
 
    /*
     * @brief Handler for image changes.
     * This method is called when the image data changes (setImage or updateTile).
     * The base implementation does nothing, but it can be overridden to react to image changes.
     */
    void onImageChanged() override;
    
private:
    [[nodiscard]] QImage convertImageRegionToQImage(const Core::Common::ImageRegion& region) const;
 
    [[nodiscard]] bool isImagePaintValid() const;
 
signals:
    void zoomChanged(float zoom);
 
    void panChanged(const QPointF& pan);
 
    void imageSizeChanged();
};
 
} // namespace Rendering
 
} // namespace CaptureMoment::UI