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    41 

    42 #ifndef GUIDECIRCLE_H

    43 #define GUIDECIRCLE_H

    44 

    45 #include "guide.h"

    46 #include "demoitem.h"

    47 

    48 class GuideCircle : public Guide

    49 {

    50 public:

    51     enum DIRECTION {CW = 1, CCW = -1};

    52 

    53     GuideCircle(const QRectF &rect, float startAngle = 0, float span = 360, DIRECTION dir = CCW, Guide *follows = 0);

    54 

    55     void guide(DemoItem *item, float moveSpeed); // overridden

    56     QPointF startPos();

    57     QPointF endPos();

    58     float length();

    59 

    60 private:

    61     float posX;

    62     float posY;

    63     float radiusX;

    64     float radiusY;

    65     float startAngleRad;

    66     float endAngleRad;

    67     float spanRad;

    68     float stepAngleRad;

    69 };

    70 

    71 #endif // GUIDECIRCLE_H

    72