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41
42 #include "private/qwinnativepangesturerecognizer_win_p.h"
43
44 #include "qevent.h"
45 #include "qgraphicsitem.h"
46 #include "qgesture.h"
47
48 #include "private/qgesture_p.h"
49 #include "private/qevent_p.h"
50 #include "private/qapplication_p.h"
51 #include "private/qwidget_p.h"
52
53 #ifndef QT_NO_GESTURES
54
55 QT_BEGIN_NAMESPACE
56
57 #if !defined(QT_NO_NATIVE_GESTURES)
58
QWinNativePanGestureRecognizer()59 QWinNativePanGestureRecognizer::QWinNativePanGestureRecognizer()
60 {
61 }
62
create(QObject * target)63 QGesture *QWinNativePanGestureRecognizer::create(QObject *target)
64 {
65 if (!target)
66 return new QPanGesture; // a special case
67 if (!target->isWidgetType())
68 return 0;
69 if (qobject_cast<QGraphicsObject *>(target))
70 return 0;
71
72 QWidget *q = static_cast<QWidget *>(target);
73 QWidgetPrivate *d = q->d_func();
74 d->nativeGesturePanEnabled = true;
75 d->winSetupGestures();
76
77 return new QPanGesture;
78 }
79
recognize(QGesture * state,QObject *,QEvent * event)80 QGestureRecognizer::Result QWinNativePanGestureRecognizer::recognize(QGesture *state,
81 QObject *,
82 QEvent *event)
83 {
84 QPanGesture *q = static_cast<QPanGesture*>(state);
85 QPanGesturePrivate *d = q->d_func();
86
87 QGestureRecognizer::Result result = QGestureRecognizer::Ignore;
88 if (event->type() == QEvent::NativeGesture) {
89 QNativeGestureEvent *ev = static_cast<QNativeGestureEvent*>(event);
90 switch(ev->gestureType) {
91 case QNativeGestureEvent::GestureBegin:
92 break;
93 case QNativeGestureEvent::Pan:
94 result = QGestureRecognizer::TriggerGesture;
95 event->accept();
96 break;
97 case QNativeGestureEvent::GestureEnd:
98 if (q->state() == Qt::NoGesture)
99 return QGestureRecognizer::Ignore; // some other gesture has ended
100 result = QGestureRecognizer::FinishGesture;
101 break;
102 default:
103 return QGestureRecognizer::Ignore;
104 }
105 if (q->state() == Qt::NoGesture) {
106 d->lastOffset = d->offset = QPointF();
107 d->startPosition = ev->position;
108 } else {
109 d->lastOffset = d->offset;
110 d->offset = QPointF(ev->position.x() - d->startPosition.x(),
111 ev->position.y() - d->startPosition.y());
112 }
113 }
114 return result;
115 }
116
reset(QGesture * state)117 void QWinNativePanGestureRecognizer::reset(QGesture *state)
118 {
119 QPanGesture *pan = static_cast<QPanGesture*>(state);
120 QPanGesturePrivate *d = pan->d_func();
121
122 d->lastOffset = d->offset = QPointF();
123 d->startPosition = QPoint();
124 d->acceleration = 0;
125
126 QGestureRecognizer::reset(state);
127 }
128
129 #endif // QT_NO_NATIVE_GESTURES
130
131 QT_END_NAMESPACE
132
133 #endif // QT_NO_GESTURES
134