mythgesture.h

Go to the documentation of this file.

/* -*- myth -*- */
#ifndef MYTHGESTURE_H
#define MYTHGESTURE_H

#include <sys/types.h>

#include <qpoint.h>
#include <qvaluelist.h>
#include <qevent.h>

const int MythGestureEventType = 24427;

class MythGestureEvent : public QCustomEvent
{
  public:
    enum Gesture {

        /* Horizontal and vertical lines */
        Up,
        Down,
        Left,
        Right,

        /* Diagonal lines */
        UpLeft,
        UpRight,
        DownLeft,
        DownRight,

        /* Two Lines */
        UpThenLeft,
        UpThenRight,
        DownThenLeft,
        DownThenRight,
        LeftThenUp,
        LeftThenDown,
        RightThenUp,
        RightThenDown,

        /* A click */
        Click,

        /* This isn't real */
        MaxGesture
    };

    inline MythGestureEvent(size_t gesture):QCustomEvent(MythGestureEventType)
    {
        (gesture >= MaxGesture) ? _gesture = MaxGesture : _gesture = gesture;
    }

    inline int gesture(void) const { return this->_gesture; }

    operator QString() const;

 private:

    size_t _gesture;
};

/* forward declaration of private information */
class MythGesturePrivate;

class MythGesture 
{
public:

    MythGesture(size_t max_points = 10000, size_t min_points = 50,
                size_t max_sequence = 20, size_t scale_ratio = 4,
                float bin_percent = 0.07);
   ~MythGesture();

    void start(void);

    void stop(void);

    bool recording(void) const;

    MythGestureEvent *gesture(void) const;

    bool record(const QPoint &p);

    bool hasMinimumPoints(void) const { return points.size() >= min_points; }

protected:

    QString translate(void);

    void adjustExtremes(int x, int y);

private:

    bool m_recording;
    int min_x;
    int max_x;
    int min_y;
    int max_y;
    size_t max_points;
    size_t min_points;
    size_t max_sequence;
    int scale_ratio;
    float bin_percent;
    size_t last_gesture;    
    QValueList <QPoint> points;

    MythGesturePrivate *p;
};

#endif /* MYTHGESTURE_H */

---