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#ifndef QGESTUREMANAGER_P_H
#define QGESTUREMANAGER_P_H

//
//  W A R N I N G
//  -------------
//
// This file is not part of the Qt API.  It exists for the convenience
// of other Qt classes.  This header file may change from version to
// version without notice, or even be removed.
//
// We mean it.
//

#include "qlist.h"
#include "qset.h"
#include "qevent.h"
#include "qbasictimer.h"
#include "qpointer.h"

#include "qgesturerecognizer.h"

QT_BEGIN_NAMESPACE

class QWidget;
class Q_AUTOTEST_EXPORT QGestureManager : public QObject
{
    Q_OBJECT
public:
    QGestureManager(QObject *parent);

    int eventDeliveryDelay() const;
    void setEventDeliveryDelay(int ms);

    void addRecognizer(QGestureRecognizer *recognizer);
    void removeRecognizer(QGestureRecognizer *recognizer);

    bool filterEvent(QWidget *receiver, QEvent *event);
    bool inGestureMode();

    int makeGestureId(const QString &name);
    void releaseGestureId(int gestureId);
    QString gestureNameFromId(int gestureId) const;

    // declared in qapplication.cpp
    static QGestureManager* instance();

    bool sendGestureEvent(QWidget *receiver,
                          const QSet<QGesture*> &startedGestures,
                          const QSet<QGesture*> &updatedGestures,
                          const QSet<QString> &cancelled = QSet<QString>());

protected:
    void timerEvent(QTimerEvent *event);

private slots:
    void recognizerStateChanged(QGestureRecognizer::Result);

private:
    QSet<QGestureRecognizer*> activeGestures;
    QMap<QGestureRecognizer*, int> maybeGestures;
    QSet<QGestureRecognizer*> recognizers;

    QPoint lastPos;

    int eventDeliveryDelayTimeout;
    int delayedPressTimer;
    QPointer<QWidget> lastMousePressReceiver;
    QMouseEvent lastMousePressEvent;

    QMap<int, QString> gestureIdMap;
    int lastGestureId;

    enum State {
        Gesture,
        NotGesture,
        MaybeGesture // that mean timers are up and waiting for some
                     // more events, and input events are handled by
                     // gesture recognizer explicitely
    } state;
};

QT_END_NAMESPACE

#endif // QGESTUREMANAGER_P_H