image_viewer.h

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#ifndef INLINE_IMAGE_VIEWER_H
#define INLINE_IMAGE_VIEWER_H
 
#include <QFrame>
 
class QLabel;
class ImageDecoder;
class TranslationManager;

class ImageViewer final : public QFrame {
    Q_OBJECT
 
public:
    explicit ImageViewer(const QByteArray &image_data, QWidget *parent = nullptr);

    ~ImageViewer() override {
        ReleaseResources();
    }

    void ReleaseResources();

    [[nodiscard]] QSize sizeHint() const override;
 
private slots:
    void LoadImage() const;

    void HandleImageReady(const QImage &image);

    void HandleError(const QString &message);

    void HandleImageInfo(int width, int height, bool has_alpha);
 
signals:
    void imageInfoReady(int width, int height, bool has_alpha);

    void imageLoaded();
 
private:
    QLabel *image_label_;
    std::shared_ptr<ImageDecoder> decoder_;
    QByteArray image_data_;
    QImage original_image_;

    int image_width_ = 0;
    int image_height_ = 0;
    bool has_alpha_ = false;
    TranslationManager *translator_ = nullptr;
};
 
#endif // INLINE_IMAGE_VIEWER_H