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svgwindow.h Example File
painting/svgviewer/svgwindow.h

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 #ifndef SVGWINDOW_H
 #define SVGWINDOW_H

 #include <QPoint>
 #include <QScrollArea>
 #include <QString>

 class QKeyEvent;
 class QMouseEvent;

 class SvgWindow : public QScrollArea
 {
 public:
     enum RendererType { Native, OpenGL, Image };

     SvgWindow();
     void mousePressEvent(QMouseEvent *event);
     void mouseMoveEvent(QMouseEvent *event);
     void mouseReleaseEvent(QMouseEvent *event);
     void openFile(const QString &file);
     void setRenderer(RendererType type = Native);
     void setHighQualityAntialiasing(bool highQualityAntialiasing);

 private:
     QPoint mousePressPos;
     QPoint scrollBarValuesOnMousePress;
     QString currentPath;
     RendererType renderer;

     bool highQualityAntialiasing;
 };

 #endif