svgview.h Example File

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  #ifndef SVGVIEW_H
  #define SVGVIEW_H

  #include <QGraphicsView>

  class QGraphicsSvgItem;
  class QSvgRenderer;
  class QWheelEvent;
  class QPaintEvent;

  class SvgView : public QGraphicsView
  {
      Q_OBJECT

  public:
      enum RendererType { Native, OpenGL, Image };

      explicit SvgView(QWidget *parent = nullptr);

      bool openFile(const QString &fileName);
      void setRenderer(RendererType type = Native);
      void drawBackground(QPainter *p, const QRectF &rect) override;

      QSize svgSize() const;
      QSvgRenderer *renderer() const;

      qreal zoomFactor() const;

  public slots:
      void setHighQualityAntialiasing(bool highQualityAntialiasing);
      void setViewBackground(bool enable);
      void setViewOutline(bool enable);
      void zoomIn();
      void zoomOut();
      void resetZoom();

  signals:
      void zoomChanged();

  protected:
      void wheelEvent(QWheelEvent *event) override;
      void paintEvent(QPaintEvent *event) override;

  private:
      void zoomBy(qreal factor);

      RendererType m_renderer;

      QGraphicsSvgItem *m_svgItem;
      QGraphicsRectItem *m_backgroundItem;
      QGraphicsRectItem *m_outlineItem;

      QImage m_image;
  };
  #endif // SVGVIEW_H