diff options
Diffstat (limited to 'src/quick/items/qquickevents.cpp')
-rw-r--r-- | src/quick/items/qquickevents.cpp | 32 |
1 files changed, 16 insertions, 16 deletions
diff --git a/src/quick/items/qquickevents.cpp b/src/quick/items/qquickevents.cpp index 8653d758de..4a786d5569 100644 --- a/src/quick/items/qquickevents.cpp +++ b/src/quick/items/qquickevents.cpp @@ -790,17 +790,19 @@ QQuickItem *QQuickEventPoint::grabberItem() const void QQuickEventPoint::setGrabberItem(QQuickItem *grabber) { if (grabber != m_exclusiveGrabber.data()) { + QQuickPointerHandler *oldGrabberHandler = grabberPointerHandler(); + if (oldGrabberHandler && !oldGrabberHandler->approveGrabTransition(this, grabber)) + return; if (Q_UNLIKELY(lcPointerGrab().isDebugEnabled())) { qCDebug(lcPointerGrab) << pointDeviceName(this) << "point" << hex << m_pointId << pointStateString(this) << ": grab" << m_exclusiveGrabber << "->" << grabber; } - QQuickPointerHandler *oldGrabberHandler = grabberPointerHandler(); - QQuickItem *oldGrabberItem = grabberItem(); m_exclusiveGrabber = QPointer<QObject>(grabber); m_grabberIsHandler = false; m_sceneGrabPos = m_scenePos; + QQuickItem *oldGrabberItem = grabberItem(); if (oldGrabberHandler) - oldGrabberHandler->onGrabChanged(oldGrabberHandler, CancelGrabExclusive, this); + oldGrabberHandler->onGrabChanged(oldGrabberHandler, (grabber ? CancelGrabExclusive : UngrabExclusive), this); else if (oldGrabberItem && oldGrabberItem != grabber && grabber && pointerEvent()->asPointerTouchEvent()) oldGrabberItem->touchUngrabEvent(); for (QPointer<QQuickPointerHandler> passiveGrabber : m_passiveGrabbers) @@ -837,26 +839,24 @@ void QQuickEventPoint::setGrabberPointerHandler(QQuickPointerHandler *grabber, b } if (exclusive) { if (grabber != m_exclusiveGrabber.data()) { + QQuickPointerHandler *oldGrabberHandler = grabberPointerHandler(); + QQuickItem *oldGrabberItem = grabberItem(); + m_exclusiveGrabber = QPointer<QObject>(grabber); + m_grabberIsHandler = true; + m_sceneGrabPos = m_scenePos; if (grabber) { - // set variables before notifying the new grabber - m_exclusiveGrabber = QPointer<QObject>(grabber); - m_grabberIsHandler = true; - m_sceneGrabPos = m_scenePos; grabber->onGrabChanged(grabber, GrabExclusive, this); for (QPointer<QQuickPointerHandler> passiveGrabber : m_passiveGrabbers) { if (passiveGrabber != grabber) passiveGrabber->onGrabChanged(grabber, OverrideGrabPassive, this); } - } else if (QQuickPointerHandler *oldGrabberPointerHandler = qmlobject_cast<QQuickPointerHandler *>(m_exclusiveGrabber.data())) { - oldGrabberPointerHandler->onGrabChanged(oldGrabberPointerHandler, UngrabExclusive, this); - } else if (!m_exclusiveGrabber.isNull()) { - // If there is a previous grabber and it's not a PointerHandler, it must be an Item. - QQuickItem *oldGrabberItem = static_cast<QQuickItem *>(m_exclusiveGrabber.data()); - // If this point came from a touchscreen, notify that previous grabber Item that it's losing its touch grab. - if (pointerEvent()->asPointerTouchEvent()) - oldGrabberItem->touchUngrabEvent(); } - // set variables after notifying the old grabber + if (oldGrabberHandler) + oldGrabberHandler->onGrabChanged(oldGrabberHandler, (grabber ? CancelGrabExclusive : UngrabExclusive), this); + else if (oldGrabberItem && pointerEvent()->asPointerTouchEvent()) + oldGrabberItem->touchUngrabEvent(); + // touchUngrabEvent() can result in the grabber being set to null (MPTA does that, for example). + // So set it again to ensure that final state is what we want. m_exclusiveGrabber = QPointer<QObject>(grabber); m_grabberIsHandler = true; m_sceneGrabPos = m_scenePos; |