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29 #ifndef WIDGET_H
30 #define WIDGET_H
31 
32 #include <QtWidgets/QWidget>
33 #include <QtCharts/QPieSeries>
34 
35 QT_BEGIN_NAMESPACE
36 class QTimer;
37 QT_END_NAMESPACE
38 
39 QT_CHARTS_USE_NAMESPACE
40 
41 class Widget : public QWidget
42 {
43     Q_OBJECT
44 
45 public:
46     Widget(QWidget *parent = 0);
47     ~Widget();
48 
49 public slots:
50     void updateRotation();
51     void explodeSlice(bool exploded);
52 
53 private:
54     QList<QPieSeries *> m_donuts;
55     QTimer *updateTimer;
56 };
57 
58 #endif // WIDGET_H
59