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50
51#ifndef SVGVIEW_H
52#define SVGVIEW_H
53
54#include <QGraphicsView>
55
56QT_BEGIN_NAMESPACE
57class QGraphicsSvgItem;
58class QSvgRenderer;
59class QWheelEvent;
60class QPaintEvent;
61QT_END_NAMESPACE
62
63class SvgView : public QGraphicsView
64{
65 Q_OBJECT
66
67public:
68 enum RendererType { Native, OpenGL, Image };
69
70 explicit SvgView(QWidget *parent = nullptr);
71
72 bool openFile(const QString &fileName);
73 void setRenderer(RendererType type = Native);
74 void drawBackground(QPainter *p, const QRectF &rect) override;
75
76 QSize svgSize() const;
77 QSvgRenderer *renderer() const;
78
79 qreal zoomFactor() const;
80
81public slots:
82 void setAntialiasing(bool antialiasing);
83 void setViewBackground(bool enable);
84 void setViewOutline(bool enable);
85 void zoomIn();
86 void zoomOut();
87 void resetZoom();
88
89signals:
90 void zoomChanged();
91
92protected:
93 void wheelEvent(QWheelEvent *event) override;
94 void paintEvent(QPaintEvent *event) override;
95
96private:
97 void zoomBy(qreal factor);
98
99 RendererType m_renderer;
100
101 QGraphicsSvgItem *m_svgItem;
102 QGraphicsRectItem *m_backgroundItem;
103 QGraphicsRectItem *m_outlineItem;
104
105 QImage m_image;
106};
107#endif // SVGVIEW_H
108

source code of qtsvg/examples/svg/svgviewer/svgview.h