From da83365fbf7ff393f7dc99d28eda61b902081bb2 Mon Sep 17 00:00:00 2001 From: Thomas Zander Date: Fri, 30 Oct 2009 12:42:49 +0100 Subject: Make GestureCancelPolicy work for graphicsview Reviewed-By: Denis --- src/gui/graphicsview/qgraphicsscene.cpp | 90 +++++++++++++++++++++++++++++++++ src/gui/graphicsview/qgraphicsscene_p.h | 1 + src/gui/kernel/qgesture.h | 1 + src/gui/kernel/qgesturemanager.cpp | 37 ++++++-------- src/gui/kernel/qgesturemanager_p.h | 2 + 5 files changed, 109 insertions(+), 22 deletions(-) diff --git a/src/gui/graphicsview/qgraphicsscene.cpp b/src/gui/graphicsview/qgraphicsscene.cpp index c459d21..9279fe3 100644 --- a/src/gui/graphicsview/qgraphicsscene.cpp +++ b/src/gui/graphicsview/qgraphicsscene.cpp @@ -5941,6 +5941,13 @@ void QGraphicsScenePrivate::gestureEventHandler(QGestureEvent *event) continue; } } + foreach (QGesture *g, startedGestures) { + 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, event->widget()); + } + } // forget about targets for gestures that have ended foreach (QGesture *g, allGestures) { @@ -5955,6 +5962,89 @@ void QGraphicsScenePrivate::gestureEventHandler(QGestureEvent *event) } } +void QGraphicsScenePrivate::cancelGesturesForChildren(QGesture *original, QWidget *viewport) +{ + Q_ASSERT(original); + QGraphicsItem *originalItem = gestureTargets.value(original); + Q_ASSERT(originalItem); + + // iterate over all active gestures and for each find the owner + // if the owner is part of our sub-hierarchy, cancel it. + + QSet canceledGestures; + QHash::Iterator iter = gestureTargets.begin(); + while (iter != gestureTargets.end()) { + QGraphicsObject *item = iter.value(); + // note that we don't touch the gestures for our originalItem + if (item != originalItem && originalItem->isAncestorOf(item)) { + DEBUG() << " found a gesture to cancel" << iter.key(); + iter.key()->d_func()->state = Qt::GestureCanceled; + canceledGestures << iter.key(); + } + ++iter; + } + + // sort them per target item by cherry picking from almostCanceledGestures and delivering + QSet almostCanceledGestures = canceledGestures; + QSet::Iterator setIter; + while (!almostCanceledGestures.isEmpty()) { + QGraphicsObject *target = 0; + QSet gestures; + setIter = almostCanceledGestures.begin(); + // sort per target item + while (setIter != almostCanceledGestures.end()) { + QGraphicsObject *item = gestureTargets.value(*setIter); + if (target == 0) + target = item; + if (target == item) { + gestures << *setIter; + setIter = almostCanceledGestures.erase(setIter); + } else { + ++setIter; + } + } + Q_ASSERT(target); + + QList list = gestures.toList(); + QGestureEvent ev(list); + sendEvent(target, &ev); + + foreach (QGesture *g, list) { + if (ev.isAccepted() || ev.isAccepted(g)) + gestures.remove(g); + } + + foreach (QGesture *g, gestures) { + if (!g->hasHotSpot()) + continue; + + QPoint screenPos = g->hotSpot().toPoint(); + QList items = itemsAtPosition(screenPos, QPointF(), viewport); + for (int j = 0; j < items.size(); ++j) { + QGraphicsObject *item = items.at(j)->toGraphicsObject(); + if (!item) + continue; + QGraphicsItemPrivate *d = item->QGraphicsItem::d_func(); + if (d->gestureContext.contains(g->gestureType())) { + QList list; + list << g; + QGestureEvent ev(list); + sendEvent(item, &ev); + if (ev.isAccepted() || ev.isAccepted(g)) + break; // successfully delivered + } + } + } + } + + QGestureManager *gm = QApplicationPrivate::instance()->gestureManager; + Q_ASSERT(gm); // it would be very odd if we got called without a manager. + for (setIter = canceledGestures.begin(); setIter != canceledGestures.end(); ++setIter) { + gm->recycle(*setIter); + gestureTargets.remove(*setIter); + } +} + QT_END_NAMESPACE #include "moc_qgraphicsscene.cpp" diff --git a/src/gui/graphicsview/qgraphicsscene_p.h b/src/gui/graphicsview/qgraphicsscene_p.h index cd20fd0..f8db084 100644 --- a/src/gui/graphicsview/qgraphicsscene_p.h +++ b/src/gui/graphicsview/qgraphicsscene_p.h @@ -288,6 +288,7 @@ public: QMap *conflictedGestures, QList > *conflictedItems, QHash *normalGestures); + void cancelGesturesForChildren(QGesture *original, QWidget *viewport); void updateInputMethodSensitivityInViews(); diff --git a/src/gui/kernel/qgesture.h b/src/gui/kernel/qgesture.h index 524d26e..8614ecb 100644 --- a/src/gui/kernel/qgesture.h +++ b/src/gui/kernel/qgesture.h @@ -97,6 +97,7 @@ private: friend class QGestureEvent; friend class QGestureRecognizer; friend class QGestureManager; + friend class QGraphicsScenePrivate; }; class QPanGesturePrivate; diff --git a/src/gui/kernel/qgesturemanager.cpp b/src/gui/kernel/qgesturemanager.cpp index f1abc89..1d33c84 100644 --- a/src/gui/kernel/qgesturemanager.cpp +++ b/src/gui/kernel/qgesturemanager.cpp @@ -346,12 +346,7 @@ bool QGestureManager::filterEventThroughContexts(const QMultiHash endedGestures = finishedGestures + canceledGestures + undeliveredGestures; foreach (QGesture *gesture, endedGestures) { - if (QGestureRecognizer *recognizer = m_gestureToRecognizer.value(gesture, 0)) { - gesture->setGestureCancelPolicy(QGesture::CancelNone); - recognizer->reset(gesture); - } else { - cleanupGesturesForRemovedRecognizer(gesture); - } + recycle(gesture); m_gestureTargets.remove(gesture); } return ret; @@ -409,15 +404,8 @@ void QGestureManager::cancelGesturesForChildren(QGesture *original) deliverEvents(gestures, &undeliveredGestures); } - for (iter = cancelledGestures.begin(); iter != cancelledGestures.end(); ++iter) { - QGestureRecognizer *recognizer = m_gestureToRecognizer.value(*iter, 0); - if (recognizer) { - (*iter)->setGestureCancelPolicy(QGesture::CancelNone); - recognizer->reset(*iter); - } else { - cleanupGesturesForRemovedRecognizer(*iter); - } - } + for (iter = cancelledGestures.begin(); iter != cancelledGestures.end(); ++iter) + recycle(*iter); } void QGestureManager::cleanupGesturesForRemovedRecognizer(QGesture *gesture) @@ -667,19 +655,24 @@ void QGestureManager::timerEvent(QTimerEvent *event) it = m_maybeGestures.erase(it); DEBUG() << "QGestureManager::timerEvent: gesture stopped due to timeout:" << gesture; - QGestureRecognizer *recognizer = m_gestureToRecognizer.value(gesture, 0); - if (recognizer) { - gesture->setGestureCancelPolicy(QGesture::CancelNone); - recognizer->reset(gesture); - } else { - cleanupGesturesForRemovedRecognizer(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" diff --git a/src/gui/kernel/qgesturemanager_p.h b/src/gui/kernel/qgesturemanager_p.h index 4958cdb..d60aedc 100644 --- a/src/gui/kernel/qgesturemanager_p.h +++ b/src/gui/kernel/qgesturemanager_p.h @@ -81,6 +81,8 @@ public: void cleanupCachedGestures(QObject *target, Qt::GestureType type); + void recycle(QGesture *gesture); + protected: void timerEvent(QTimerEvent *event); bool filterEventThroughContexts(const QMultiHash &contexts, -- cgit v0.12