display.h

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#ifndef DISPLAY_H
#define DISPLAY_H
 
#include <QGraphicsRectItem>
#include <QGraphicsScene>
#include <QGraphicsView>
#include <QMouseEvent>
#include <QPainter>
#include <QRect>
 
#include <cstdint>
 
 
class CustomDisplay;
 
 
class CustomGraphicsScene : public QGraphicsScene
{
    Q_OBJECT
 
public:
    explicit CustomGraphicsScene(CustomDisplay* pParent);
    ~CustomGraphicsScene() = default;
 
    void setImage(QImage image);
    QRectF getImageRect();
 
private:
    CustomDisplay* m_parent;
    QImage m_image;
 
    virtual void drawBackground(QPainter* painter, const QRectF& rect);
};
 
 
class CustomDisplay : public QGraphicsView
{
    Q_OBJECT
 
public:
    explicit CustomDisplay(QWidget* parent);
    ~CustomDisplay() = default;
 
    QRectF getImageRect();
    void toggleDrawROI();
 
protected:
    void mouseMoveEvent(QMouseEvent* event) override;
    void mouseReleaseEvent(QMouseEvent* event) override;
 
private:
    CustomGraphicsScene* m_scene;
    bool m_drawROI = false;
    QGraphicsRectItem* m_dragRect{};
 
public slots:
    void onImageReceived(QImage image);
 
signals:
    void newROI(QRectF roi);
};
 
#endif // DISPLAY_H