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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#ifndef QT_NO_GESTURES
62
63QT_BEGIN_NAMESPACE
64
65class QBasicTimer;
66class QGraphicsObject;
67class QGestureManager : public QObject
68{
69 Q_OBJECT
70public:
71 QGestureManager(QObject *parent);
72 ~QGestureManager();
73
74 Qt::GestureType registerGestureRecognizer(QGestureRecognizer *recognizer);
75 void unregisterGestureRecognizer(Qt::GestureType type);
76
77 bool filterEvent(QWidget *receiver, QEvent *event);
78 bool filterEvent(QObject *receiver, QEvent *event);
79#ifndef QT_NO_GRAPHICSVIEW
80 bool filterEvent(QGraphicsObject *receiver, QEvent *event);
81#endif //QT_NO_GRAPHICSVIEW
82
83 static QGestureManager* instance(); // declared in qapplication.cpp
84
85 void cleanupCachedGestures(QObject *target, Qt::GestureType type);
86
87 void recycle(QGesture *gesture);
88
89protected:
90 bool filterEventThroughContexts(const QMultiMap<QObject *, Qt::GestureType> &contexts,
91 QEvent *event);
92
93private:
94 QMultiMap<Qt::GestureType, QGestureRecognizer *> m_recognizers;
95
96 QSet<QGesture *> m_activeGestures;
97 QSet<QGesture *> m_maybeGestures;
98
99 enum State {
100 Gesture,
101 NotGesture,
102 MaybeGesture // this means timers are up and waiting for some
103 // more events, and input events are handled by
104 // gesture recognizer explicitly
105 } state;
106
107 struct ObjectGesture
108 {
109 QObject* object;
110 Qt::GestureType gesture;
111
112 ObjectGesture(QObject *o, const Qt::GestureType &g) : object(o), gesture(g) { }
113 inline bool operator<(const ObjectGesture &rhs) const
114 {
115 if (object < rhs.object)
116 return true;
117 if (object == rhs.object)
118 return gesture < rhs.gesture;
119 return false;
120 }
121 };
122
123 QMap<ObjectGesture, QList<QGesture *> > m_objectGestures;
124 QHash<QGesture *, QGestureRecognizer *> m_gestureToRecognizer;
125 QHash<QGesture *, QObject *> m_gestureOwners;
126
127 QHash<QGesture *, QWidget *> m_gestureTargets;
128
129 int m_lastCustomGestureId;
130
131 QHash<QGestureRecognizer *, QSet<QGesture *> > m_obsoleteGestures;
132 QHash<QGesture *, QGestureRecognizer *> m_deletedRecognizers;
133 QSet<QGesture *> m_gesturesToDelete;
134 void cleanupGesturesForRemovedRecognizer(QGesture *gesture);
135
136 QGesture *getState(QObject *widget, QGestureRecognizer *recognizer,
137 Qt::GestureType gesture);
138 void deliverEvents(const QSet<QGesture *> &gestures,
139 QSet<QGesture *> *undeliveredGestures);
140 void getGestureTargets(const QSet<QGesture*> &gestures,
141 QMap<QWidget *, QList<QGesture *> > *conflicts,
142 QMap<QWidget *, QList<QGesture *> > *normal);
143
144 void cancelGesturesForChildren(QGesture *originatingGesture);
145};
146
147QT_END_NAMESPACE
148
149#endif // QT_NO_GESTURES
150
151#endif // QGESTUREMANAGER_P_H
152