src/widgets/platforms/mac/qmacgesturerecognizer_mac.mm

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  41
  42 #include "qmacgesturerecognizer_mac_p.h"
  43 #include "qgesture.h"
  44 #include "qgesture_p.h"
  45 #include "qevent.h"
  46 #include "qevent_p.h"
  47 #include "qwidget.h"
  48 #include "qdebug.h"
  49
  50 #ifndef QT_NO_GESTURES
  51
  52 QT_BEGIN_NAMESPACE
  53
  54 QMacSwipeGestureRecognizer::QMacSwipeGestureRecognizer()
  55 {
  56 }
  57
  58 QGesture *QMacSwipeGestureRecognizer::create(QObject * /*target*/)
  59 {
  60     return new QSwipeGesture;
  61 }
  62
  63 QGestureRecognizer::Result
  64 QMacSwipeGestureRecognizer::recognize(QGesture *gesture, QObject *obj, QEvent *event)
  65 {
  66     if (event->type() == QEvent::NativeGesture && obj->isWidgetType()) {
  67         QNativeGestureEvent *ev = static_cast<QNativeGestureEvent*>(event);
  68         switch (ev->gestureType) {
  69             case QNativeGestureEvent::Swipe: {
  70                 QSwipeGesture *g = static_cast<QSwipeGesture *>(gesture);
  71                 g->setSwipeAngle(ev->angle);
  72                 g->setHotSpot(ev->position);
  73                 return QGestureRecognizer::FinishGesture | QGestureRecognizer::ConsumeEventHint;
  74                 break; }
  75             default:
  76                 break;
  77         }
  78     }
  79
  80     return QGestureRecognizer::Ignore;
  81 }
  82
  83 void QMacSwipeGestureRecognizer::reset(QGesture *gesture)
  84 {
  85     QSwipeGesture *g = static_cast<QSwipeGesture *>(gesture);
  86     g->setSwipeAngle(0);
  87     QGestureRecognizer::reset(gesture);
  88 }
  89
  90 ////////////////////////////////////////////////////////////////////////
  91
  92 QMacPinchGestureRecognizer::QMacPinchGestureRecognizer()
  93 {
  94 }
  95
  96 QGesture *QMacPinchGestureRecognizer::create(QObject * /*target*/)
  97 {
  98     return new QPinchGesture;
  99 }
 100
 101 QGestureRecognizer::Result
 102 QMacPinchGestureRecognizer::recognize(QGesture *gesture, QObject *obj, QEvent *event)
 103 {
 104     if (event->type() == QEvent::NativeGesture && obj->isWidgetType()) {
 105         QPinchGesture *g = static_cast<QPinchGesture *>(gesture);
 106         QNativeGestureEvent *ev = static_cast<QNativeGestureEvent*>(event);
 107         switch(ev->gestureType) {
 108         case QNativeGestureEvent::GestureBegin:
 109             reset(gesture);
 110             g->setStartCenterPoint(static_cast<QWidget*>(obj)->mapFromGlobal(ev->position));
 111             g->setCenterPoint(g->startCenterPoint());
 112             g->setChangeFlags(QPinchGesture::CenterPointChanged);
 113             g->setTotalChangeFlags(g->totalChangeFlags() | g->changeFlags());
 114             g->setHotSpot(ev->position);
 115             return QGestureRecognizer::MayBeGesture | QGestureRecognizer::ConsumeEventHint;
 116         case QNativeGestureEvent::Rotate: {
 117             g->setLastScaleFactor(g->scaleFactor());
 118             g->setLastRotationAngle(g->rotationAngle());
 119             g->setRotationAngle(g->rotationAngle() + ev->percentage);
 120             g->setChangeFlags(QPinchGesture::RotationAngleChanged);
 121             g->setTotalChangeFlags(g->totalChangeFlags() | g->changeFlags());
 122             g->setHotSpot(ev->position);
 123             return QGestureRecognizer::TriggerGesture | QGestureRecognizer::ConsumeEventHint;
 124         }
 125         case QNativeGestureEvent::Zoom:
 126             g->setLastScaleFactor(g->scaleFactor());
 127             g->setLastRotationAngle(g->rotationAngle());
 128             g->setScaleFactor(g->scaleFactor() * (1 + ev->percentage));
 129             g->setChangeFlags(QPinchGesture::ScaleFactorChanged);
 130             g->setTotalChangeFlags(g->totalChangeFlags() | g->changeFlags());
 131             g->setHotSpot(ev->position);
 132             return QGestureRecognizer::TriggerGesture | QGestureRecognizer::ConsumeEventHint;
 133         case QNativeGestureEvent::GestureEnd:
 134             return QGestureRecognizer::FinishGesture | QGestureRecognizer::ConsumeEventHint;
 135         default:
 136             break;
 137         }
 138     }
 139
 140     return QGestureRecognizer::Ignore;
 141 }
 142
 143 void QMacPinchGestureRecognizer::reset(QGesture *gesture)
 144 {
 145     QPinchGesture *g = static_cast<QPinchGesture *>(gesture);
 146     g->setChangeFlags(0);
 147     g->setTotalChangeFlags(0);
 148     g->setScaleFactor(1.0f);
 149     g->setTotalScaleFactor(1.0f);
 150     g->setLastScaleFactor(1.0f);
 151     g->setRotationAngle(0.0f);
 152     g->setTotalRotationAngle(0.0f);
 153     g->setLastRotationAngle(0.0f);
 154     g->setCenterPoint(QPointF());
 155     g->setStartCenterPoint(QPointF());
 156     g->setLastCenterPoint(QPointF());
 157     QGestureRecognizer::reset(gesture);
 158 }
 159
 160 ////////////////////////////////////////////////////////////////////////
 161
 162
 163 QMacPanGestureRecognizer::QMacPanGestureRecognizer() : _panCanceled(true)
 164 {
 165 }
 166
 167 QGesture *QMacPanGestureRecognizer::create(QObject *target)
 168 {
 169     if (!target)
 170         return new QPanGesture;
 171
 172     if (QWidget *w = qobject_cast<QWidget *>(target)) {
 173         w->setAttribute(Qt::WA_AcceptTouchEvents);
 174         w->setAttribute(Qt::WA_TouchPadAcceptSingleTouchEvents);
 175         return new QPanGesture;
 176     }
 177     return 0;
 178 }
 179
 180 QGestureRecognizer::Result
 181 QMacPanGestureRecognizer::recognize(QGesture *gesture, QObject *target, QEvent *event)
 182 {
 183     const int panBeginDelay = 300;
 184     const int panBeginRadius = 3;
 185
 186     QPanGesture *g = static_cast<QPanGesture *>(gesture);
 187
 188     switch (event->type()) {
 189     case QEvent::TouchBegin: {
 190         const QTouchEvent *ev = static_cast<const QTouchEvent*>(event);
 191         if (ev->touchPoints().size() == 1) {
 192             reset(gesture);
 193             _startPos = QCursor::pos();
 194             _panTimer.start(panBeginDelay, target);
 195             _panCanceled = false;
 196             return QGestureRecognizer::MayBeGesture;
 197         }
 198         break;}
 199     case QEvent::TouchEnd: {
 200         if (_panCanceled)
 201             break;
 202
 203         const QTouchEvent *ev = static_cast<const QTouchEvent*>(event);
 204         if (ev->touchPoints().size() == 1)
 205             return QGestureRecognizer::FinishGesture;
 206         break;}
 207     case QEvent::TouchUpdate: {
 208         if (_panCanceled)
 209             break;
 210
 211         const QTouchEvent *ev = static_cast<const QTouchEvent*>(event);
 212         if (ev->touchPoints().size() == 1) {
 213             if (_panTimer.isActive()) {
 214                 // INVARIANT: Still in maybeGesture. Check if the user
 215                 // moved his finger so much that it makes sense to cancel the pan:
 216                 const QPointF p = QCursor::pos();
 217                 if ((p - _startPos).manhattanLength() > panBeginRadius) {
 218                     _panCanceled = true;
 219                     _panTimer.stop();
 220                     return QGestureRecognizer::CancelGesture;
 221                 }
 222             } else {
 223                 const QPointF p = QCursor::pos();
 224                 const QPointF posOffset = p - _startPos;
 225                 g->setLastOffset(g->offset());
 226                 g->setOffset(QPointF(posOffset.x(), posOffset.y()));
 227                 g->setHotSpot(_startPos);
 228                 return QGestureRecognizer::TriggerGesture;
 229             }
 230         } else if (_panTimer.isActive()) {
 231             // I only want to cancel the pan if the user is pressing
 232             // more than one finger, and the pan hasn't started yet:
 233             _panCanceled = true;
 234             _panTimer.stop();
 235             return QGestureRecognizer::CancelGesture;
 236         }
 237         break;}
 238     case QEvent::Timer: {
 239         QTimerEvent *ev = static_cast<QTimerEvent *>(event);
 240         if (ev->timerId() == _panTimer.timerId()) {
 241             _panTimer.stop();
 242             if (_panCanceled)
 243                 break;
 244             // Begin new pan session!
 245             _startPos = QCursor::pos();
 246             g->setHotSpot(_startPos);
 247             return QGestureRecognizer::TriggerGesture | QGestureRecognizer::ConsumeEventHint;
 248         }
 249         break; }
 250     default:
 251         break;
 252     }
 253
 254     return QGestureRecognizer::Ignore;
 255 }
 256
 257 void QMacPanGestureRecognizer::reset(QGesture *gesture)
 258 {
 259     QPanGesture *g = static_cast<QPanGesture *>(gesture);
 260     _startPos = QPointF();
 261     _panCanceled = true;
 262     g->setOffset(QPointF(0, 0));
 263     g->setLastOffset(QPointF(0, 0));
 264     g->setAcceleration(qreal(1));
 265     QGestureRecognizer::reset(gesture);
 266 }
 267
 268 QT_END_NAMESPACE
 269
 270 #endif // QT_NO_GESTURES