diff options
Diffstat (limited to 'src/gui/kernel/qgesturemanager.cpp')
| -rw-r--r-- | src/gui/kernel/qgesturemanager.cpp | 690 |
1 files changed, 465 insertions, 225 deletions
diff --git a/src/gui/kernel/qgesturemanager.cpp b/src/gui/kernel/qgesturemanager.cpp index 0f0aef2b75..628892d4d1 100644 --- a/src/gui/kernel/qgesturemanager.cpp +++ b/src/gui/kernel/qgesturemanager.cpp @@ -44,6 +44,7 @@ #include "private/qwidget_p.h" #include "private/qgesture_p.h" #include "private/qgraphicsitem_p.h" +#include "private/qevent_p.h" #include "qgesture.h" #include "qevent.h" #include "qgraphicsitem.h" @@ -51,6 +52,9 @@ #ifdef Q_WS_MAC #include "qmacgesturerecognizer_mac_p.h" #endif +#if defined(Q_OS_WIN) +#include "qwinnativepangesturerecognizer_win_p.h" +#endif #include "qdebug.h" @@ -63,8 +67,17 @@ QT_BEGIN_NAMESPACE +QGestureManager *qt_gestureManager = 0; + +QGestureManager* QGestureManager::instance() +{ + if (!qt_gestureManager) + qt_gestureManager = new QGestureManager(qApp); + return qt_gestureManager; +} + QGestureManager::QGestureManager(QObject *parent) - : QObject(parent), state(NotGesture), lastCustomGestureId(0) + : QObject(parent), state(NotGesture), m_lastCustomGestureId(0) { qRegisterMetaType<Qt::GestureState>(); @@ -76,38 +89,83 @@ QGestureManager::QGestureManager(QObject *parent) #endif #else registerGestureRecognizer(new QPanGestureRecognizer); + registerGestureRecognizer(new QPinchGestureRecognizer); +#if defined(Q_OS_WIN) + registerGestureRecognizer(new QWinNativePanGestureRecognizer); +#endif #endif } QGestureManager::~QGestureManager() { - + qDeleteAll(m_recognizers.values()); + foreach (QGestureRecognizer *recognizer, m_obsoleteGestures.keys()) { + qDeleteAll(m_obsoleteGestures.value(recognizer)); + delete recognizer; + } + m_obsoleteGestures.clear(); } Qt::GestureType QGestureManager::registerGestureRecognizer(QGestureRecognizer *recognizer) { - QGesture *dummy = recognizer->createGesture(0); + QGesture *dummy = recognizer->create(0); if (!dummy) { - qWarning("QGestureManager::registerGestureRecognizer: the recognizer doesn't provide gesture object"); + qWarning("QGestureManager::registerGestureRecognizer: " + "the recognizer fails to create a gesture object, skipping registration."); return Qt::GestureType(0); } Qt::GestureType type = dummy->gestureType(); if (type == Qt::CustomGesture) { // generate a new custom gesture id - ++lastCustomGestureId; - type = Qt::GestureType(Qt::CustomGesture + lastCustomGestureId); + ++m_lastCustomGestureId; + type = Qt::GestureType(Qt::CustomGesture + m_lastCustomGestureId); } - recognizers.insertMulti(type, recognizer); + m_recognizers.insertMulti(type, recognizer); delete dummy; return type; } -void QGestureManager::unregisterGestureRecognizer(Qt::GestureType) +void QGestureManager::unregisterGestureRecognizer(Qt::GestureType type) { + QList<QGestureRecognizer *> list = m_recognizers.values(type); + m_recognizers.remove(type); + foreach (QGesture *g, m_gestureToRecognizer.keys()) { + QGestureRecognizer *recognizer = m_gestureToRecognizer.value(g); + if (list.contains(recognizer)) { + m_deletedRecognizers.insert(g, recognizer); + m_gestureToRecognizer.remove(g); + } + } + foreach (QGestureRecognizer *recognizer, list) { + QList<QGesture *> obsoleteGestures; + QMap<ObjectGesture, QList<QGesture *> >::Iterator iter = m_objectGestures.begin(); + while (iter != m_objectGestures.end()) { + ObjectGesture objectGesture = iter.key(); + if (objectGesture.gesture == type) + obsoleteGestures << iter.value(); + ++iter; + } + m_obsoleteGestures.insert(recognizer, obsoleteGestures); + } } -QGesture* QGestureManager::getState(QObject *object, Qt::GestureType type) +void QGestureManager::cleanupCachedGestures(QObject *target, Qt::GestureType type) +{ + QMap<ObjectGesture, QList<QGesture *> >::Iterator iter = m_objectGestures.begin(); + while (iter != m_objectGestures.end()) { + ObjectGesture objectGesture = iter.key(); + if (objectGesture.gesture == type && target == objectGesture.object.data()) { + qDeleteAll(iter.value()); + iter = m_objectGestures.erase(iter); + } else { + ++iter; + } + } +} + +// get or create a QGesture object that will represent the state for a given object, used by the recognizer +QGesture *QGestureManager::getState(QObject *object, QGestureRecognizer *recognizer, Qt::GestureType type) { // if the widget is being deleted we should be carefull and not to // create a new state, as it will create QWeakPointer which doesnt work @@ -115,28 +173,43 @@ QGesture* QGestureManager::getState(QObject *object, Qt::GestureType type) if (object->isWidgetType()) { if (static_cast<QWidget *>(object)->d_func()->data.in_destructor) return 0; + } else if (QGesture *g = qobject_cast<QGesture *>(object)) { + return g; + } else { + Q_ASSERT(qobject_cast<QGraphicsObject *>(object)); } - QWeakPointer<QGesture> state = objectGestures.value(QGestureManager::ObjectGesture(object, type)); - if (!state) { - QGestureRecognizer *recognizer = recognizers.value(type); - if (recognizer) { - state = recognizer->createGesture(object); - if (!state) - return 0; - if (state.data()->gestureType() == Qt::CustomGesture) { - // if the recognizer didn't fill in the gesture type, then this - // is a custom gesture with autogenerated it and we fill it. - state.data()->d_func()->gestureType = type; - } - objectGestures.insert(QGestureManager::ObjectGesture(object, type), state); - gestureToRecognizer[state.data()] = recognizer; - } + QList<QGesture *> states = + m_objectGestures.value(QGestureManager::ObjectGesture(object, type)); + // check if the QGesture for this recognizer has already been created + foreach (QGesture *state, states) { + if (m_gestureToRecognizer.value(state) == recognizer) + return state; } - return state.data(); + + Q_ASSERT(recognizer); + QGesture *state = recognizer->create(object); + if (!state) + return 0; + state->setParent(this); + if (state->gestureType() == Qt::CustomGesture) { + // if the recognizer didn't fill in the gesture type, then this + // is a custom gesture with autogenerated id and we fill it. + state->d_func()->gestureType = type; +#if defined(GESTURE_DEBUG) + state->setObjectName(QString::number((int)type)); +#endif + } + m_objectGestures[QGestureManager::ObjectGesture(object, type)].append(state); + m_gestureToRecognizer[state] = recognizer; + m_gestureOwners[state] = object; + + return state; } -bool QGestureManager::filterEvent(QObject *receiver, QEvent *event) +bool QGestureManager::filterEventThroughContexts(const QMultiHash<QObject *, + Qt::GestureType> &contexts, + QEvent *event) { QSet<QGesture *> triggeredGestures; QSet<QGesture *> finishedGestures; @@ -144,140 +217,80 @@ bool QGestureManager::filterEvent(QObject *receiver, QEvent *event) QSet<QGesture *> canceledGestures; QSet<QGesture *> notGestures; - QGraphicsObject *graphicsObject = qobject_cast<QGraphicsObject *>(receiver); - if (receiver->isWidgetType() || graphicsObject) { - QMap<QObject *, Qt::GestureType> contexts; - if (receiver->isWidgetType()) { - QWidget *w = static_cast<QWidget *>(receiver); - if (!w->d_func()->gestureContext.isEmpty()) { - typedef QMap<Qt::GestureType, Qt::GestureContext>::const_iterator ContextIterator; - for(ContextIterator it = w->d_func()->gestureContext.begin(), - e = w->d_func()->gestureContext.end(); it != e; ++it) { - contexts.insertMulti(w, it.key()); - } - } - // find all gesture contexts for the widget tree - w = w->parentWidget(); - while (w) - { - typedef QMap<Qt::GestureType, Qt::GestureContext>::const_iterator ContextIterator; - for (ContextIterator it = w->d_func()->gestureContext.begin(), - e = w->d_func()->gestureContext.end(); it != e; ++it) { - if (it.value() == Qt::WidgetWithChildrenGesture) - contexts.insertMulti(w, it.key()); - } - w = w->parentWidget(); - } - } else { - QGraphicsObject *item = graphicsObject; - if (!item->QGraphicsItem::d_func()->gestureContext.isEmpty()) { - typedef QMap<Qt::GestureType, Qt::GestureContext>::const_iterator ContextIterator; - for(ContextIterator it = item->QGraphicsItem::d_func()->gestureContext.begin(), - e = item->QGraphicsItem::d_func()->gestureContext.end(); it != e; ++it) { - contexts.insertMulti(item, it.key()); - } - } - // find all gesture contexts for the widget tree - item = item->parentObject(); - while (item) - { - typedef QMap<Qt::GestureType, Qt::GestureContext>::const_iterator ContextIterator; - for (ContextIterator it = item->QGraphicsItem::d_func()->gestureContext.begin(), - e = item->QGraphicsItem::d_func()->gestureContext.end(); it != e; ++it) { - if (it.value() == Qt::WidgetWithChildrenGesture) - contexts.insertMulti(item, it.key()); - } - item = item->parentObject(); - } - } - // filter the event through recognizers - typedef QMap<QObject *, Qt::GestureType>::const_iterator ContextIterator; - for (ContextIterator cit = contexts.begin(), ce = contexts.end(); cit != ce; ++cit) { - Qt::GestureType gestureType = cit.value(); - QMap<Qt::GestureType, QGestureRecognizer *>::const_iterator - rit = recognizers.lowerBound(gestureType), - re = recognizers.upperBound(gestureType); - for (; rit != re; ++rit) { - QGestureRecognizer *recognizer = rit.value(); - QObject *target = cit.key(); - QGesture *state = getState(target, gestureType); - if (!state) - continue; - QGestureRecognizer::Result result = recognizer->filterEvent(state, target, event); - QGestureRecognizer::Result type = result & QGestureRecognizer::ResultState_Mask; - if (type == QGestureRecognizer::GestureTriggered) { - DEBUG() << "QGestureManager: gesture triggered: " << state; - triggeredGestures << state; - } else if (type == QGestureRecognizer::GestureFinished) { - DEBUG() << "QGestureManager: gesture finished: " << state; - finishedGestures << state; - } else if (type == QGestureRecognizer::MaybeGesture) { - DEBUG() << "QGestureManager: maybe gesture: " << state; - newMaybeGestures << state; - } else if (type == QGestureRecognizer::NotGesture) { - DEBUG() << "QGestureManager: not gesture: " << state; - notGestures << state; - } else if (type == QGestureRecognizer::Ignore) { - DEBUG() << "QGestureManager: gesture ignored the event: " << state; - } else { - DEBUG() << "QGestureManager: hm, lets assume the recognizer ignored the event: " << state; - } - if (result & QGestureRecognizer::ConsumeEventHint) { - DEBUG() << "QGestureManager: we were asked to consume the event: " << state; - //TODO: consume events if asked - } - } - } - } else if (QGesture *state = qobject_cast<QGesture*>(receiver)) { - if (QGestureRecognizer *recognizer = gestureToRecognizer.value(state)) { - QGestureRecognizer::Result result = recognizer->filterEvent(state, state, event); + // TODO: sort contexts by the gesture type and check if one of the contexts + // is already active. + + bool ret = false; + + // filter the event through recognizers + typedef QHash<QObject *, Qt::GestureType>::const_iterator ContextIterator; + for (ContextIterator cit = contexts.begin(), ce = contexts.end(); cit != ce; ++cit) { + Qt::GestureType gestureType = cit.value(); + QMap<Qt::GestureType, QGestureRecognizer *>::const_iterator + rit = m_recognizers.lowerBound(gestureType), + re = m_recognizers.upperBound(gestureType); + for (; rit != re; ++rit) { + QGestureRecognizer *recognizer = rit.value(); + QObject *target = cit.key(); + QGesture *state = getState(target, recognizer, gestureType); + if (!state) + continue; + QGestureRecognizer::Result result = recognizer->recognize(state, target, event); QGestureRecognizer::Result type = result & QGestureRecognizer::ResultState_Mask; - if (type == QGestureRecognizer::GestureTriggered) { - DEBUG() << "QGestureManager: gesture triggered: " << state; + result &= QGestureRecognizer::ResultHint_Mask; + if (type == QGestureRecognizer::TriggerGesture) { + DEBUG() << "QGestureManager:Recognizer: gesture triggered: " << state; triggeredGestures << state; - } else if (type == QGestureRecognizer::GestureFinished) { - DEBUG() << "QGestureManager: gesture finished: " << state; + } else if (type == QGestureRecognizer::FinishGesture) { + DEBUG() << "QGestureManager:Recognizer: gesture finished: " << state; finishedGestures << state; - } else if (type == QGestureRecognizer::MaybeGesture) { - DEBUG() << "QGestureManager: maybe gesture: " << state; + } else if (type == QGestureRecognizer::MayBeGesture) { + DEBUG() << "QGestureManager:Recognizer: maybe gesture: " << state; newMaybeGestures << state; - } else if (type == QGestureRecognizer::NotGesture) { - DEBUG() << "QGestureManager: not gesture: " << state; + } else if (type == QGestureRecognizer::CancelGesture) { + DEBUG() << "QGestureManager:Recognizer: not gesture: " << state; notGestures << state; } else if (type == QGestureRecognizer::Ignore) { - DEBUG() << "QGestureManager: gesture ignored the event: " << state; + DEBUG() << "QGestureManager:Recognizer: ignored the event: " << state; } else { - DEBUG() << "QGestureManager: hm, lets assume the recognizer ignored the event: " << state; + DEBUG() << "QGestureManager:Recognizer: hm, lets assume the recognizer" + << "ignored the event: " << state; + } + if (result & QGestureRecognizer::ConsumeEventHint) { + DEBUG() << "QGestureManager: we were asked to consume the event: " + << state; + ret = true; } } - } else { - return false; } - QSet<QGesture *> startedGestures = triggeredGestures - activeGestures; - triggeredGestures &= activeGestures; + QSet<QGesture *> startedGestures = triggeredGestures - m_activeGestures; + triggeredGestures &= m_activeGestures; // check if a running gesture switched back to maybe state - QSet<QGesture *> activeToMaybeGestures = activeGestures & newMaybeGestures; + QSet<QGesture *> activeToMaybeGestures = m_activeGestures & newMaybeGestures; - // check if a running gesture switched back to not gesture state, i.e. were canceled - QSet<QGesture *> activeToCancelGestures = activeGestures & notGestures; + // check if a running gesture switched back to not gesture state, + // i.e. were canceled + QSet<QGesture *> activeToCancelGestures = m_activeGestures & notGestures; canceledGestures += activeToCancelGestures; // start timers for new gestures in maybe state foreach (QGesture *state, newMaybeGestures) { - QBasicTimer &timer = maybeGestures[state]; + QBasicTimer &timer = m_maybeGestures[state]; if (!timer.isActive()) timer.start(3000, this); } // kill timers for gestures that were in maybe state - QSet<QGesture *> notMaybeGestures = (startedGestures | triggeredGestures | finishedGestures | canceledGestures | notGestures); + QSet<QGesture *> notMaybeGestures = (startedGestures | triggeredGestures + | finishedGestures | canceledGestures + | notGestures); foreach(QGesture *gesture, notMaybeGestures) { - QMap<QGesture *, QBasicTimer>::iterator it = - maybeGestures.find(gesture); - if (it != maybeGestures.end()) { + QHash<QGesture *, QBasicTimer>::iterator it = + m_maybeGestures.find(gesture); + if (it != m_maybeGestures.end()) { it.value().stop(); - maybeGestures.erase(it); + m_maybeGestures.erase(it); } } @@ -288,21 +301,23 @@ bool QGestureManager::filterEvent(QObject *receiver, QEvent *event) Q_ASSERT((finishedGestures & canceledGestures).isEmpty()); Q_ASSERT((canceledGestures & newMaybeGestures).isEmpty()); - QSet<QGesture *> notStarted = finishedGestures - activeGestures; + QSet<QGesture *> notStarted = finishedGestures - m_activeGestures; if (!notStarted.isEmpty()) { // there are some gestures that claim to be finished, but never started. // probably those are "singleshot" gestures so we'll fake the started state. foreach (QGesture *gesture, notStarted) gesture->d_func()->state = Qt::GestureStarted; - deliverEvents(notStarted, receiver); + QSet<QGesture *> undeliveredGestures; + deliverEvents(notStarted, &undeliveredGestures); + finishedGestures -= undeliveredGestures; } - activeGestures += startedGestures; + m_activeGestures += startedGestures; // sanity check: all triggered gestures should already be in active gestures list - Q_ASSERT((activeGestures & triggeredGestures).size() == triggeredGestures.size()); - activeGestures -= finishedGestures; - activeGestures -= activeToMaybeGestures; - activeGestures -= canceledGestures; + Q_ASSERT((m_activeGestures & triggeredGestures).size() == triggeredGestures.size()); + m_activeGestures -= finishedGestures; + m_activeGestures -= activeToMaybeGestures; + m_activeGestures -= canceledGestures; // set the proper gesture state on each gesture foreach (QGesture *gesture, startedGestures) @@ -316,152 +331,377 @@ bool QGestureManager::filterEvent(QObject *receiver, QEvent *event) foreach (QGesture *gesture, activeToMaybeGestures) gesture->d_func()->state = Qt::GestureFinished; - if (!activeGestures.isEmpty() || !maybeGestures.isEmpty() || + if (!m_activeGestures.isEmpty() || !m_maybeGestures.isEmpty() || !startedGestures.isEmpty() || !triggeredGestures.isEmpty() || !finishedGestures.isEmpty() || !canceledGestures.isEmpty()) { - DEBUG() << "QGestureManager::filterEvent:" - << "\n\tactiveGestures:" << activeGestures - << "\n\tmaybeGestures:" << maybeGestures.keys() + DEBUG() << "QGestureManager::filterEventThroughContexts:" + << "\n\tactiveGestures:" << m_activeGestures + << "\n\tmaybeGestures:" << m_maybeGestures.keys() << "\n\tstarted:" << startedGestures << "\n\ttriggered:" << triggeredGestures << "\n\tfinished:" << finishedGestures << "\n\tcanceled:" << canceledGestures; } - deliverEvents(startedGestures+triggeredGestures+finishedGestures+canceledGestures, receiver); + QSet<QGesture *> undeliveredGestures; + deliverEvents(startedGestures+triggeredGestures+finishedGestures+canceledGestures, + &undeliveredGestures); + + foreach (QGesture *g, startedGestures) { + if (undeliveredGestures.contains(g)) + continue; + if (g->gestureCancelPolicy() == QGesture::CancelAllInContext) { + DEBUG() << "lets try to cancel some"; + // find gestures in context in Qt::GestureStarted or Qt::GestureUpdated state and cancel them + cancelGesturesForChildren(g); + } + } + + m_activeGestures -= undeliveredGestures; // reset gestures that ended - QSet<QGesture *> endedGestures = finishedGestures + canceledGestures; + QSet<QGesture *> endedGestures = + finishedGestures + canceledGestures + undeliveredGestures; foreach (QGesture *gesture, endedGestures) { - if (QGestureRecognizer *recognizer = gestureToRecognizer.value(gesture, 0)) { - recognizer->reset(gesture); + recycle(gesture); + m_gestureTargets.remove(gesture); + } + return ret; +} + +// Cancel all gestures of children of the widget that original is associated with +void QGestureManager::cancelGesturesForChildren(QGesture *original) +{ + Q_ASSERT(original); + QWidget *originatingWidget = m_gestureTargets.value(original); + Q_ASSERT(originatingWidget); + + // iterate over all active gestures and all maybe gestures + // for each find the owner + // if the owner is part of our sub-hierarchy, cancel it. + + QSet<QGesture*> cancelledGestures; + QSet<QGesture*>::Iterator iter = m_activeGestures.begin(); + while (iter != m_activeGestures.end()) { + QWidget *widget = m_gestureTargets.value(*iter); + // note that we don't touch the gestures for our originatingWidget + if (widget != originatingWidget && originatingWidget->isAncestorOf(widget)) { + DEBUG() << " found a gesture to cancel" << (*iter); + (*iter)->d_func()->state = Qt::GestureCanceled; + cancelledGestures << *iter; + iter = m_activeGestures.erase(iter); + } else { + ++iter; + } + } + + // TODO handle 'maybe' gestures too + + // sort them per target widget by cherry picking from almostCanceledGestures and delivering + QSet<QGesture *> almostCanceledGestures = cancelledGestures; + while (!almostCanceledGestures.isEmpty()) { + QWidget *target = 0; + QSet<QGesture*> gestures; + iter = almostCanceledGestures.begin(); + // sort per target widget + while (iter != almostCanceledGestures.end()) { + QWidget *widget = m_gestureTargets.value(*iter); + if (target == 0) + target = widget; + if (target == widget) { + gestures << *iter; + iter = almostCanceledGestures.erase(iter); + } else { + ++iter; + } + } + Q_ASSERT(target); + + QSet<QGesture*> undeliveredGestures; + deliverEvents(gestures, &undeliveredGestures); + } + + for (iter = cancelledGestures.begin(); iter != cancelledGestures.end(); ++iter) + recycle(*iter); +} + +void QGestureManager::cleanupGesturesForRemovedRecognizer(QGesture *gesture) +{ + QGestureRecognizer *recognizer = m_deletedRecognizers.value(gesture); + Q_ASSERT(recognizer); + m_deletedRecognizers.remove(gesture); + if (m_deletedRecognizers.keys(recognizer).isEmpty()) { + // no more active gestures, cleanup! + qDeleteAll(m_obsoleteGestures.value(recognizer)); + m_obsoleteGestures.remove(recognizer); + delete recognizer; + } +} + +// return true if accepted (consumed) +bool QGestureManager::filterEvent(QWidget *receiver, QEvent *event) +{ + QSet<Qt::GestureType> types; + QMultiHash<QObject *, Qt::GestureType> contexts; + QWidget *w = receiver; + typedef QMap<Qt::GestureType, Qt::GestureFlags>::const_iterator ContextIterator; + if (!w->d_func()->gestureContext.isEmpty()) { + for(ContextIterator it = w->d_func()->gestureContext.begin(), + e = w->d_func()->gestureContext.end(); it != e; ++it) { + types.insert(it.key()); + contexts.insertMulti(w, it.key()); + } + } + // find all gesture contexts for the widget tree + w = w->isWindow() ? 0 : w->parentWidget(); + while (w) + { + for (ContextIterator it = w->d_func()->gestureContext.begin(), + e = w->d_func()->gestureContext.end(); it != e; ++it) { + if (!(it.value() & Qt::DontStartGestureOnChildren)) { + if (!types.contains(it.key())) { + types.insert(it.key()); + contexts.insertMulti(w, it.key()); + } + } } - gestureTargets.remove(gesture); + if (w->isWindow()) + break; + w = w->parentWidget(); } - return false; + return filterEventThroughContexts(contexts, event); } -void QGestureManager::deliverEvents(const QSet<QGesture*> &gestures, QObject *lastReceiver) +#ifndef QT_NO_GRAPHICSVIEW +bool QGestureManager::filterEvent(QGraphicsObject *receiver, QEvent *event) +{ + QSet<Qt::GestureType> types; + QMultiHash<QObject *, Qt::GestureType> contexts; + QGraphicsObject *item = receiver; + if (!item->QGraphicsItem::d_func()->gestureContext.isEmpty()) { + typedef QMap<Qt::GestureType, Qt::GestureFlags>::const_iterator ContextIterator; + for(ContextIterator it = item->QGraphicsItem::d_func()->gestureContext.begin(), + e = item->QGraphicsItem::d_func()->gestureContext.end(); it != e; ++it) { + types.insert(it.key()); + contexts.insertMulti(item, it.key()); + } + } + // find all gesture contexts for the graphics object tree + item = item->parentObject(); + while (item) + { + typedef QMap<Qt::GestureType, Qt::GestureFlags>::const_iterator ContextIterator; + for (ContextIterator it = item->QGraphicsItem::d_func()->gestureContext.begin(), + e = item->QGraphicsItem::d_func()->gestureContext.end(); it != e; ++it) { + if (!(it.value() & Qt::DontStartGestureOnChildren)) { + if (!types.contains(it.key())) { + types.insert(it.key()); + contexts.insertMulti(item, it.key()); + } + } + } + item = item->parentObject(); + } + return filterEventThroughContexts(contexts, event); +} +#endif + +bool QGestureManager::filterEvent(QGesture *state, QEvent *event) +{ + QMultiHash<QObject *, Qt::GestureType> contexts; + contexts.insert(state, state->gestureType()); + return filterEventThroughContexts(contexts, event); +} + +void QGestureManager::getGestureTargets(const QSet<QGesture*> &gestures, + QMap<QWidget *, QList<QGesture *> > *conflicts, + QMap<QWidget *, QList<QGesture *> > *normal) +{ + typedef QHash<Qt::GestureType, QHash<QWidget *, QGesture *> > GestureByTypes; + GestureByTypes gestureByTypes; + + // sort gestures by types + foreach (QGesture *gesture, gestures) { + QWidget *receiver = m_gestureTargets.value(gesture, 0); + Q_ASSERT(receiver); + gestureByTypes[gesture->gestureType()].insert(receiver, gesture); + } + + // for each gesture type + foreach (Qt::GestureType type, gestureByTypes.keys()) { + QHash<QWidget *, QGesture *> gestures = gestureByTypes.value(type); + foreach (QWidget *widget, gestures.keys()) { + QWidget *w = widget->parentWidget(); + while (w) { + QMap<Qt::GestureType, Qt::GestureFlags>::const_iterator it + = w->d_func()->gestureContext.find(type); + if (it != w->d_func()->gestureContext.end()) { + // i.e. 'w' listens to gesture 'type' + Qt::GestureFlags flags = it.value(); + if (!(it.value() & Qt::DontStartGestureOnChildren) && w != widget) { + // conflicting gesture! + (*conflicts)[widget].append(gestures[widget]); + break; + } + } + if (w->isWindow()) { + w = 0; + break; + } + w = w->parentWidget(); + } + if (!w) + (*normal)[widget].append(gestures[widget]); + } + } +} + +void QGestureManager::deliverEvents(const QSet<QGesture *> &gestures, + QSet<QGesture *> *undeliveredGestures) { if (gestures.isEmpty()) return; - // group gestures by widgets - typedef QMap<QObject *, QList<QGesture *> > GesturesPerReceiver; - GesturesPerReceiver groupedGestures; - // for conflicted gestures the key is always the innermost widget (i.e. the child) - GesturesPerReceiver conflictedGestures; - QMultiHash<QObject *, QGesture *> objectGestures; + typedef QMap<QWidget *, QList<QGesture *> > GesturesPerWidget; + GesturesPerWidget conflictedGestures; + GesturesPerWidget normalStartedGestures; - foreach (QGesture *gesture, gestures) { - QObject *target = gestureTargets.value(gesture, 0); + QSet<QGesture *> startedGestures; + // first figure out the initial receivers of gestures + for (QSet<QGesture *>::const_iterator it = gestures.begin(), + e = gestures.end(); it != e; ++it) { + QGesture *gesture = *it; + QWidget *target = m_gestureTargets.value(gesture, 0); if (!target) { + // the gesture has just started and doesn't have a target yet. Q_ASSERT(gesture->state() == Qt::GestureStarted); if (gesture->hasHotSpot()) { - // guess the target using the hotspot of the gesture + // guess the target widget using the hotspot of the gesture QPoint pt = gesture->hotSpot().toPoint(); - if (!pt.isNull()) { - if (QWidget *w = qApp->topLevelAt(pt)) - target = w->childAt(w->mapFromGlobal(pt)); + if (QWidget *w = qApp->topLevelAt(pt)) { + target = w->childAt(w->mapFromGlobal(pt)); } + } else { + // or use the context of the gesture + QObject *context = m_gestureOwners.value(gesture, 0); + if (context->isWidgetType()) + target = static_cast<QWidget *>(context); } - if (!target) { - target = gesture->targetObject(); - if (!target) - target = lastReceiver; - } + if (target) + m_gestureTargets.insert(gesture, target); } + + Qt::GestureType gestureType = gesture->gestureType(); + Q_ASSERT(gestureType != Qt::CustomGesture); + if (target) { - gestureTargets.insert(gesture, target); - if (target->isWidgetType()) - objectGestures.insert(target, gesture); - groupedGestures[target].append(gesture); + if (gesture->state() == Qt::GestureStarted) { + startedGestures.insert(gesture); + } else { + normalStartedGestures[target].append(gesture); + } } else { - qWarning() << "QGestureManager::deliverEvent: could not find the target for gesture" + DEBUG() << "QGestureManager::deliverEvent: could not find the target for gesture" << gesture->gestureType(); + qWarning("QGestureManager::deliverEvent: could not find the target for gesture"); + undeliveredGestures->insert(gesture); } } - typedef QMultiHash<QObject *, QGesture *>::const_iterator ObjectGesturesIterator; - for (ObjectGesturesIterator it = objectGestures.begin(), e = objectGestures.end(); it != e; ++it) { - QObject *object1 = it.key(); - QWidget *widget1 = qobject_cast<QWidget *>(object1); - QGraphicsObject *item1 = qobject_cast<QGraphicsObject *>(object1); - QGesture *gesture1 = it.value(); - ObjectGesturesIterator cit = it; - for (++cit; cit != e; ++cit) { - QObject *object2 = cit.key(); - QWidget *widget2 = qobject_cast<QWidget *>(object2); - QGraphicsObject *item2 = qobject_cast<QGraphicsObject *>(object2); - QGesture *gesture2 = cit.value(); - // TODO: ugly, rewrite this. - if ((widget1 && widget2 && widget2->isAncestorOf(widget1)) || - (item1 && item2 && item2->isAncestorOf(item1))) { - groupedGestures[object2].removeOne(gesture2); - groupedGestures[object1].removeOne(gesture1); - conflictedGestures[object1].append(gesture1); - } else if ((widget1 && widget2 && widget1->isAncestorOf(widget2)) || - (item1 && item2 && item1->isAncestorOf(item2))) { - groupedGestures[object2].removeOne(gesture2); - groupedGestures[object1].removeOne(gesture1); - conflictedGestures[object2].append(gesture2); - } - } - } - - DEBUG() << "deliverEvents: conflicted =" << conflictedGestures.values() - << " grouped =" << groupedGestures.values(); + getGestureTargets(startedGestures, &conflictedGestures, &normalStartedGestures); + DEBUG() << "QGestureManager::deliverEvents:" + << "\nstarted: " << startedGestures + << "\nconflicted: " << conflictedGestures + << "\nnormal: " << normalStartedGestures + << "\n"; // if there are conflicting gestures, send the GestureOverride event - for (GesturesPerReceiver::const_iterator it = conflictedGestures.begin(), + for (GesturesPerWidget::const_iterator it = conflictedGestures.begin(), e = conflictedGestures.end(); it != e; ++it) { + QWidget *receiver = it.key(); + QList<QGesture *> gestures = it.value(); DEBUG() << "QGestureManager::deliverEvents: sending GestureOverride to" - << it.key() - << " gestures:" << it.value(); - QGestureEvent event(it.value()); + << receiver + << "gestures:" << gestures; + QGestureEvent event(gestures); event.t = QEvent::GestureOverride; + // mark event and individual gestures as ignored event.ignore(); - QApplication::sendEvent(it.key(), &event); - if (!event.isAccepted()) { - // nobody accepted the GestureOverride, put it back to deliver to - // the closest context (i.e. to the inner-most widget). - DEBUG() <<" override was not accepted"; - groupedGestures[it.key()].append(it.value()); + foreach(QGesture *g, gestures) + event.setAccepted(g, false); + + QApplication::sendEvent(receiver, &event); + bool eventAccepted = event.isAccepted(); + foreach(QGesture *gesture, event.gestures()) { + if (eventAccepted || event.isAccepted(gesture)) { + QWidget *w = event.d_func()->targetWidgets.value(gesture->gestureType(), 0); + Q_ASSERT(w); + DEBUG() << "override event: gesture was accepted:" << gesture << w; + QList<QGesture *> &gestures = normalStartedGestures[w]; + gestures.append(gesture); + // override the target + m_gestureTargets[gesture] = w; + } else { + DEBUG() << "override event: gesture wasn't accepted. putting back:" << gesture; + QList<QGesture *> &gestures = normalStartedGestures[receiver]; + gestures.append(gesture); + } } } - for (GesturesPerReceiver::const_iterator it = groupedGestures.begin(), - e = groupedGestures.end(); it != e; ++it) { + // delivering gestures that are not in conflicted state + for (GesturesPerWidget::const_iterator it = normalStartedGestures.begin(), + e = normalStartedGestures.end(); it != e; ++it) { if (!it.value().isEmpty()) { DEBUG() << "QGestureManager::deliverEvents: sending to" << it.key() - << " gestures:" << it.value(); + << "gestures:" << it.value(); QGestureEvent event(it.value()); QApplication::sendEvent(it.key(), &event); + bool eventAccepted = event.isAccepted(); + foreach (QGesture *gesture, event.gestures()) { + if (gesture->state() == Qt::GestureStarted && + (eventAccepted || event.isAccepted(gesture))) { + QWidget *w = event.d_func()->targetWidgets.value(gesture->gestureType(), 0); + Q_ASSERT(w); + DEBUG() << "started gesture was delivered and accepted by" << w; + m_gestureTargets[gesture] = w; + } + } } } } void QGestureManager::timerEvent(QTimerEvent *event) { - QMap<QGesture*, QBasicTimer>::iterator it = maybeGestures.begin(), - e = maybeGestures.end(); + QHash<QGesture *, QBasicTimer>::iterator it = m_maybeGestures.begin(), + e = m_maybeGestures.end(); for (; it != e; ) { QBasicTimer &timer = it.value(); Q_ASSERT(timer.isActive()); if (timer.timerId() == event->timerId()) { timer.stop(); QGesture *gesture = it.key(); - it = maybeGestures.erase(it); - DEBUG() << "QGestureManager::timerEvent: gesture stopped due to timeout:" << gesture; - QGestureRecognizer *recognizer = gestureToRecognizer.value(gesture, 0); - if (recognizer) - recognizer->reset(gesture); + it = m_maybeGestures.erase(it); + DEBUG() << "QGestureManager::timerEvent: gesture stopped due to timeout:" + << gesture; + recycle(gesture); } else { ++it; } } } +void QGestureManager::recycle(QGesture *gesture) +{ + QGestureRecognizer *recognizer = m_gestureToRecognizer.value(gesture, 0); + if (recognizer) { + gesture->setGestureCancelPolicy(QGesture::CancelNone); + recognizer->reset(gesture); + } else { + cleanupGesturesForRemovedRecognizer(gesture); + } +} + QT_END_NAMESPACE #include "moc_qgesturemanager_p.cpp" |