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    public:
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    public:
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        explicit SMVideoZoomWidget(QWidget *parent = 0);
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        explicit SMVideoZoomWidget(QWidget *parent = 0);
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        ~SMVideoZoomWidget();
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        ~SMVideoZoomWidget();
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    public slots:
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    public slots:
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        void showImageCV(cv::Mat image);
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        void showImageCV(cv::Mat image);
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        void fitImage();
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    protected:
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    protected:
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        virtual void mousePressEvent(QMouseEvent *event);
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        virtual void mousePressEvent(QMouseEvent *event);
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        virtual void mouseReleaseEvent(QMouseEvent *event);
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        virtual void mouseReleaseEvent(QMouseEvent *event);
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        virtual void wheelEvent(QWheelEvent *event);
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        virtual void wheelEvent(QWheelEvent *event);
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        virtual void resizeEvent(QResizeEvent *event);
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        virtual void resizeEvent(QResizeEvent *event);
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    protected slots:
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    protected slots:
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        virtual void showContextMenu(const QPoint & pos);
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        virtual void showContextMenu(const QPoint & pos);
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        virtual void fitImage();
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    private:
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    private:
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        QGraphicsScene *scene=nullptr;
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        QGraphicsScene *scene=nullptr;
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        QGraphicsPixmapItem *item=nullptr;
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        QGraphicsPixmapItem *item=nullptr;
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};
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};
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