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    41 

    42 #ifndef QGESTUREMANAGER_P_H

    43 #define QGESTUREMANAGER_P_H

    44 

    45 //

    46 //  W A R N I N G

    47 //  -------------

    48 //

    49 // This file is not part of the Qt API.  It exists for the convenience

    50 // of other Qt classes.  This header file may change from version to

    51 // version without notice, or even be removed.

    52 //

    53 // We mean it.

    54 //

    55 

    56 #include "qobject.h"

    57 #include "qbasictimer.h"

    58 #include "private/qwidget_p.h"

    59 #include "qgesturerecognizer.h"

    60 

    61 QT_BEGIN_NAMESPACE

    62 

    63 class QBasicTimer;

    64 class QGraphicsObject;

    65 class QGestureManager : public QObject

    66 {

    67     Q_OBJECT

    68 public:

    69     QGestureManager(QObject *parent);

    70     ~QGestureManager();

    71 

    72     Qt::GestureType registerGestureRecognizer(QGestureRecognizer *recognizer);

    73     void unregisterGestureRecognizer(Qt::GestureType type);

    74 

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

    76     bool filterEvent(QGesture *receiver, QEvent *event);

    77     bool filterEvent(QGraphicsObject *receiver, QEvent *event);

    78 

    79     // declared in qapplication.cpp

    80     static QGestureManager* instance();

    81 

    82 protected:

    83     void timerEvent(QTimerEvent *event);

    84     bool filterEventThroughContexts(const QMap<QObject *, Qt::GestureType> &contexts,

    85                                     QEvent *event);

    86 

    87 private:

    88     QMultiMap<Qt::GestureType, QGestureRecognizer *> recognizers;

    89 

    90     QSet<QGesture *> activeGestures;

    91     QMap<QGesture *, QBasicTimer> maybeGestures;

    92 

    93     enum State {

    94         Gesture,

    95         NotGesture,

    96         MaybeGesture // this means timers are up and waiting for some

    97                      // more events, and input events are handled by

    98                      // gesture recognizer explicitely

    99     } state;

   100 

   101     struct ObjectGesture

   102     {

   103         QWeakPointer<QObject> object;

   104         Qt::GestureType gesture;

   105 

   106         ObjectGesture(QObject *o, const Qt::GestureType &g) : object(o), gesture(g) { }

   107         inline bool operator<(const ObjectGesture& rhs) const

   108         {

   109             if (object.data() < rhs.object.data())

   110                 return true;

   111             if (object == rhs.object)

   112                 return gesture < rhs.gesture;

   113             return false;

   114         }

   115     };

   116 

   117     QMap<ObjectGesture, QGesture *> objectGestures;

   118     QMap<QGesture *, QGestureRecognizer *> gestureToRecognizer;

   119     QHash<QGesture *, QObject *> gestureOwners;

   120 

   121     QHash<QGesture *, QWidget *> gestureTargets;

   122 

   123     int lastCustomGestureId;

   124 

   125     QGesture *getState(QObject *widget, Qt::GestureType gesture);

   126     void deliverEvents(const QSet<QGesture *> &gestures,

   127                        QSet<QGesture *> *undeliveredGestures);

   128     void getGestureTargets(const QSet<QGesture*> &gestures,

   129                            QMap<QWidget *, QList<QGesture *> > *conflicts,

   130                            QMap<QWidget *, QList<QGesture *> > *normal);

   131 };

   132 

   133 QT_END_NAMESPACE

   134 

   135 #endif // QGESTUREMANAGER_P_H