From 3ec88b355b5c9649d128fcf18cb2abc39ac0e770 Mon Sep 17 00:00:00 2001 From: Andy Shaw Date: Wed, 28 Mar 2012 21:54:52 +0200 Subject: Plug memory leak when gestures are grabbed but never triggered When a gesture is grabbed by QAbstractScrollArea but never triggered then the deletion of the QAbstractScrollArea would mean that the gesture created for it would not be deleted. This ensures that it always deletes the gestures waiting to be deleted even if no gesture event is triggered Task-number: QTBUG-25011 Change-Id: I36118b82baaa60ac4e014896159060e1af76b2d2 Reviewed-by: Denis Dzyubenko --- src/widgets/kernel/qgesturemanager.cpp | 184 ++++++++++++++++----------------- 1 file changed, 91 insertions(+), 93 deletions(-) (limited to 'src/widgets/kernel') diff --git a/src/widgets/kernel/qgesturemanager.cpp b/src/widgets/kernel/qgesturemanager.cpp index 296d8d31e7..f4bf667ef8 100644 --- a/src/widgets/kernel/qgesturemanager.cpp +++ b/src/widgets/kernel/qgesturemanager.cpp @@ -285,106 +285,104 @@ bool QGestureManager::filterEventThroughContexts(const QMultiMap startedGestures = triggeredGestures - m_activeGestures; - triggeredGestures &= m_activeGestures; - - // check if a running gesture switched back to maybe state - QSet activeToMaybeGestures = m_activeGestures & newMaybeGestures; - - // check if a maybe gesture switched to canceled - reset it but don't send an event - QSet maybeToCanceledGestures = m_maybeGestures & notGestures; - - // check if a running gesture switched back to not gesture state, - // i.e. were canceled - QSet canceledGestures = m_activeGestures & notGestures; - - // new gestures in maybe state - m_maybeGestures += newMaybeGestures; - - // gestures that were in maybe state - QSet notMaybeGestures = (startedGestures | triggeredGestures - | finishedGestures | canceledGestures - | notGestures); - m_maybeGestures -= notMaybeGestures; - - Q_ASSERT((startedGestures & finishedGestures).isEmpty()); - Q_ASSERT((startedGestures & newMaybeGestures).isEmpty()); - Q_ASSERT((startedGestures & canceledGestures).isEmpty()); - Q_ASSERT((finishedGestures & newMaybeGestures).isEmpty()); - Q_ASSERT((finishedGestures & canceledGestures).isEmpty()); - Q_ASSERT((canceledGestures & newMaybeGestures).isEmpty()); - - QSet 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) + if (!triggeredGestures.isEmpty() || !finishedGestures.isEmpty() + || !newMaybeGestures.isEmpty() || !notGestures.isEmpty()) { + QSet startedGestures = triggeredGestures - m_activeGestures; + triggeredGestures &= m_activeGestures; + + // check if a running gesture switched back to maybe state + QSet activeToMaybeGestures = m_activeGestures & newMaybeGestures; + + // check if a maybe gesture switched to canceled - reset it but don't send an event + QSet maybeToCanceledGestures = m_maybeGestures & notGestures; + + // check if a running gesture switched back to not gesture state, + // i.e. were canceled + QSet canceledGestures = m_activeGestures & notGestures; + + // new gestures in maybe state + m_maybeGestures += newMaybeGestures; + + // gestures that were in maybe state + QSet notMaybeGestures = (startedGestures | triggeredGestures + | finishedGestures | canceledGestures + | notGestures); + m_maybeGestures -= notMaybeGestures; + + Q_ASSERT((startedGestures & finishedGestures).isEmpty()); + Q_ASSERT((startedGestures & newMaybeGestures).isEmpty()); + Q_ASSERT((startedGestures & canceledGestures).isEmpty()); + Q_ASSERT((finishedGestures & newMaybeGestures).isEmpty()); + Q_ASSERT((finishedGestures & canceledGestures).isEmpty()); + Q_ASSERT((canceledGestures & newMaybeGestures).isEmpty()); + + QSet 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; + QSet undeliveredGestures; + deliverEvents(notStarted, &undeliveredGestures); + finishedGestures -= undeliveredGestures; + } + + m_activeGestures += startedGestures; + // sanity check: all triggered gestures should already be in active gestures list + 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) gesture->d_func()->state = Qt::GestureStarted; - QSet undeliveredGestures; - deliverEvents(notStarted, &undeliveredGestures); - finishedGestures -= undeliveredGestures; - } + foreach (QGesture *gesture, triggeredGestures) + gesture->d_func()->state = Qt::GestureUpdated; + foreach (QGesture *gesture, finishedGestures) + gesture->d_func()->state = Qt::GestureFinished; + foreach (QGesture *gesture, canceledGestures) + gesture->d_func()->state = Qt::GestureCanceled; + foreach (QGesture *gesture, activeToMaybeGestures) + gesture->d_func()->state = Qt::GestureFinished; + + if (!m_activeGestures.isEmpty() || !m_maybeGestures.isEmpty() || + !startedGestures.isEmpty() || !triggeredGestures.isEmpty() || + !finishedGestures.isEmpty() || !canceledGestures.isEmpty()) { + DEBUG() << "QGestureManager::filterEventThroughContexts:" + << "\n\tactiveGestures:" << m_activeGestures + << "\n\tmaybeGestures:" << m_maybeGestures + << "\n\tstarted:" << startedGestures + << "\n\ttriggered:" << triggeredGestures + << "\n\tfinished:" << finishedGestures + << "\n\tcanceled:" << canceledGestures + << "\n\tmaybe-canceled:" << maybeToCanceledGestures; + } - m_activeGestures += startedGestures; - // sanity check: all triggered gestures should already be in active gestures list - 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) - gesture->d_func()->state = Qt::GestureStarted; - foreach (QGesture *gesture, triggeredGestures) - gesture->d_func()->state = Qt::GestureUpdated; - foreach (QGesture *gesture, finishedGestures) - gesture->d_func()->state = Qt::GestureFinished; - foreach (QGesture *gesture, canceledGestures) - gesture->d_func()->state = Qt::GestureCanceled; - foreach (QGesture *gesture, activeToMaybeGestures) - gesture->d_func()->state = Qt::GestureFinished; - - if (!m_activeGestures.isEmpty() || !m_maybeGestures.isEmpty() || - !startedGestures.isEmpty() || !triggeredGestures.isEmpty() || - !finishedGestures.isEmpty() || !canceledGestures.isEmpty()) { - DEBUG() << "QGestureManager::filterEventThroughContexts:" - << "\n\tactiveGestures:" << m_activeGestures - << "\n\tmaybeGestures:" << m_maybeGestures - << "\n\tstarted:" << startedGestures - << "\n\ttriggered:" << triggeredGestures - << "\n\tfinished:" << finishedGestures - << "\n\tcanceled:" << canceledGestures - << "\n\tmaybe-canceled:" << maybeToCanceledGestures; - } + QSet undeliveredGestures; + deliverEvents(startedGestures+triggeredGestures+finishedGestures+canceledGestures, + &undeliveredGestures); - QSet 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); + 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; + m_activeGestures -= undeliveredGestures; - // reset gestures that ended - QSet endedGestures = - finishedGestures + canceledGestures + undeliveredGestures + maybeToCanceledGestures; - foreach (QGesture *gesture, endedGestures) { - recycle(gesture); - m_gestureTargets.remove(gesture); + // reset gestures that ended + QSet endedGestures = + finishedGestures + canceledGestures + undeliveredGestures + maybeToCanceledGestures; + foreach (QGesture *gesture, endedGestures) { + recycle(gesture); + m_gestureTargets.remove(gesture); + } } - //Clean up the Gestures qDeleteAll(m_gesturesToDelete); m_gesturesToDelete.clear(); -- cgit v1.2.3