diff options
Diffstat (limited to 'src/gui/graphicsview/qgraphicsscene.cpp')
| -rw-r--r-- | src/gui/graphicsview/qgraphicsscene.cpp | 258 |
1 files changed, 257 insertions, 1 deletions
diff --git a/src/gui/graphicsview/qgraphicsscene.cpp b/src/gui/graphicsview/qgraphicsscene.cpp index a624b10..c459d21 100644 --- a/src/gui/graphicsview/qgraphicsscene.cpp +++ b/src/gui/graphicsview/qgraphicsscene.cpp @@ -242,7 +242,6 @@ #include <QtGui/qstyleoption.h> #include <QtGui/qtooltip.h> #include <QtGui/qtransform.h> -#include <QtGui/qgesture.h> #include <QtGui/qinputcontext.h> #include <QtGui/qgraphicseffect.h> #include <private/qapplication_p.h> @@ -251,6 +250,14 @@ #include <private/qt_x11_p.h> #endif #include <private/qgraphicseffect_p.h> +#include <private/qgesturemanager_p.h> + +// #define GESTURE_DEBUG +#ifndef GESTURE_DEBUG +# define DEBUG if (0) qDebug +#else +# define DEBUG qDebug +#endif QT_BEGIN_NAMESPACE @@ -1052,6 +1059,14 @@ bool QGraphicsScenePrivate::filterEvent(QGraphicsItem *item, QEvent *event) */ bool QGraphicsScenePrivate::sendEvent(QGraphicsItem *item, QEvent *event) { + if (QGraphicsObject *object = item->toGraphicsObject()) { + QApplicationPrivate *qAppPriv = QApplicationPrivate::instance(); + if (qAppPriv->gestureManager) { + if (qAppPriv->gestureManager->filterEvent(object, event)) + return true; + } + } + if (filterEvent(item, event)) return false; if (filterDescendantEvent(item, event)) @@ -3365,6 +3380,10 @@ bool QGraphicsScene::event(QEvent *event) case QEvent::TouchEnd: d->touchEventHandler(static_cast<QTouchEvent *>(event)); break; + case QEvent::Gesture: + case QEvent::GestureOverride: + d->gestureEventHandler(static_cast<QGestureEvent *>(event)); + break; default: return QObject::event(event); } @@ -4569,6 +4588,11 @@ void QGraphicsScenePrivate::drawSubtreeRecursive(QGraphicsItem *item, QPainter * else painter->setWorldTransform(*transformPtr); painter->setOpacity(opacity); + + if (sourced->lastEffectTransform != painter->worldTransform()) { + sourced->lastEffectTransform = painter->worldTransform(); + sourced->invalidateCache(); + } item->d_ptr->graphicsEffect->draw(painter, source); painter->setWorldTransform(restoreTransform); sourced->info = 0; @@ -5699,6 +5723,238 @@ void QGraphicsScenePrivate::leaveModal(QGraphicsItem *panel) dispatchHoverEvent(&hoverEvent); } +void QGraphicsScenePrivate::getGestureTargets(const QSet<QGesture *> &gestures, + QWidget *viewport, + QMap<Qt::GestureType, QGesture *> *conflictedGestures, + QList<QList<QGraphicsObject *> > *conflictedItems, + QHash<QGesture *, QGraphicsObject *> *normalGestures) +{ + foreach (QGesture *gesture, gestures) { + Qt::GestureType gestureType = gesture->gestureType(); + if (gesture->hasHotSpot()) { + QPoint screenPos = gesture->hotSpot().toPoint(); + QList<QGraphicsItem *> items = itemsAtPosition(screenPos, QPointF(), viewport); + QList<QGraphicsObject *> result; + 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(gestureType)) { + result.append(item); + } + } + DEBUG() << "QGraphicsScenePrivate::getGestureTargets:" + << gesture << result; + if (result.size() == 1) { + normalGestures->insert(gesture, result.first()); + } else if (!result.isEmpty()) { + conflictedGestures->insert(gestureType, gesture); + conflictedItems->append(result); + } + } + } +} + +void QGraphicsScenePrivate::gestureEventHandler(QGestureEvent *event) +{ + QWidget *viewport = event->widget(); + if (!viewport) + return; + QList<QGesture *> allGestures = event->allGestures(); + DEBUG() << "QGraphicsScenePrivate::gestureEventHandler:" + << "Delivering gestures:" << allGestures; + + typedef QHash<QGraphicsObject *, QList<QGesture *> > GesturesPerItem; + GesturesPerItem gesturesPerItem; + + QSet<QGesture *> startedGestures; + foreach (QGesture *gesture, allGestures) { + QGraphicsObject *target = gestureTargets.value(gesture, 0); + if (!target) { + // when we are not in started mode but don't have a target + // then the only one interested in gesture is the view/scene + if (gesture->state() == Qt::GestureStarted) + startedGestures.insert(gesture); + } else { + gesturesPerItem[target].append(gesture); + } + } + + QMap<Qt::GestureType, QGesture *> conflictedGestures; + QList<QList<QGraphicsObject *> > conflictedItems; + QHash<QGesture *, QGraphicsObject *> normalGestures; + getGestureTargets(startedGestures, viewport, &conflictedGestures, &conflictedItems, + &normalGestures); + DEBUG() << "QGraphicsScenePrivate::gestureEventHandler:" + << "Conflicting gestures:" << conflictedGestures.values() << conflictedItems; + Q_ASSERT((conflictedGestures.isEmpty() && conflictedItems.isEmpty()) || + (!conflictedGestures.isEmpty() && !conflictedItems.isEmpty())); + + // gestures that were sent as override events, but no one accepted them + QHash<QGesture *, QGraphicsObject *> ignoredConflictedGestures; + + // deliver conflicted gestures as override events first + while (!conflictedGestures.isEmpty() && !conflictedItems.isEmpty()) { + // get the topmost item to deliver the override event + Q_ASSERT(!conflictedItems.isEmpty()); + Q_ASSERT(!conflictedItems.first().isEmpty()); + QGraphicsObject *topmost = conflictedItems.first().first(); + for (int i = 1; i < conflictedItems.size(); ++i) { + QGraphicsObject *item = conflictedItems.at(i).first(); + if (qt_closestItemFirst(item, topmost)) { + topmost = item; + } + } + // get a list of gestures to send to the item + QList<Qt::GestureType> grabbedGestures = + topmost->QGraphicsItem::d_func()->gestureContext.keys(); + QList<QGesture *> gestures; + for (int i = 0; i < grabbedGestures.size(); ++i) { + if (QGesture *g = conflictedGestures.value(grabbedGestures.at(i), 0)) { + gestures.append(g); + if (!ignoredConflictedGestures.contains(g)) + ignoredConflictedGestures.insert(g, topmost); + } + } + + // send gesture override to the topmost item + QGestureEvent ev(gestures); + ev.t = QEvent::GestureOverride; + ev.setWidget(event->widget()); + // mark event and individual gestures as ignored + ev.ignore(); + foreach(QGesture *g, gestures) + ev.setAccepted(g, false); + DEBUG() << "QGraphicsScenePrivate::gestureEventHandler:" + << "delivering override to" + << topmost << gestures; + sendEvent(topmost, &ev); + // mark all accepted gestures to deliver them as normal gesture events + foreach (QGesture *g, gestures) { + if (ev.isAccepted() || ev.isAccepted(g)) { + conflictedGestures.remove(g->gestureType()); + gestureTargets.remove(g); + // add the gesture to the list of normal delivered gestures + normalGestures.insert(g, topmost); + DEBUG() << "QGraphicsScenePrivate::gestureEventHandler:" + << "override was accepted:" + << g << topmost; + ignoredConflictedGestures.remove(g); + } + } + // remove the item that we've already delivered from the list + for (int i = 0; i < conflictedItems.size(); ) { + QList<QGraphicsObject *> &items = conflictedItems[i]; + if (items.first() == topmost) { + items.removeFirst(); + if (items.isEmpty()) { + conflictedItems.removeAt(i); + continue; + } + } + ++i; + } + } + + // put back those started gestures that are not in the conflicted state + // and remember their targets + QHash<QGesture *, QGraphicsObject *>::const_iterator it = normalGestures.begin(), + e = normalGestures.end(); + for (; it != e; ++it) { + QGesture *g = it.key(); + QGraphicsObject *receiver = it.value(); + Q_ASSERT(!gestureTargets.contains(g)); + gestureTargets.insert(g, receiver); + gesturesPerItem[receiver].append(g); + } + it = ignoredConflictedGestures.begin(); + e = ignoredConflictedGestures.end(); + for (; it != e; ++it) { + QGesture *g = it.key(); + QGraphicsObject *receiver = it.value(); + Q_ASSERT(!gestureTargets.contains(g)); + gestureTargets.insert(g, receiver); + gesturesPerItem[receiver].append(g); + } + + DEBUG() << "QGraphicsScenePrivate::gestureEventHandler:" + << "Started gestures:" << normalGestures.keys() + << "All gestures:" << gesturesPerItem.values(); + + // deliver all events + QList<QGesture *> alreadyIgnoredGestures; + QHash<QGraphicsObject *, QSet<QGesture *> > itemIgnoredGestures; + QList<QGraphicsObject *> targetItems = gesturesPerItem.keys(); + qSort(targetItems.begin(), targetItems.end(), qt_closestItemFirst); + for (int i = 0; i < targetItems.size(); ++i) { + QGraphicsObject *item = targetItems.at(i); + QList<QGesture *> gestures = gesturesPerItem.value(item); + // remove gestures that were already delivered once and were ignored + DEBUG() << "QGraphicsScenePrivate::gestureEventHandler:" + << "already ignored gestures for item" + << item << ":" << itemIgnoredGestures.value(item); + + if (itemIgnoredGestures.contains(item)) // don't deliver twice to the same item + continue; + + QGraphicsItemPrivate *gid = item->QGraphicsItem::d_func(); + foreach(QGesture *g, alreadyIgnoredGestures) { + if (gid->gestureContext.contains(g->gestureType())) + gestures += g; + } + if (gestures.isEmpty()) + continue; + DEBUG() << "QGraphicsScenePrivate::gestureEventHandler:" + << "delivering to" + << item << gestures; + QGestureEvent ev(gestures); + ev.setWidget(event->widget()); + sendEvent(item, &ev); + QSet<QGesture *> ignoredGestures; + foreach (QGesture *g, gestures) { + if (!ev.isAccepted() && !ev.isAccepted(g)) + ignoredGestures.insert(g); + } + if (!ignoredGestures.isEmpty()) { + // get a list of items under the (current) hotspot of each ignored + // gesture and start delivery again from the beginning + DEBUG() << "QGraphicsScenePrivate::gestureEventHandler:" + << "item has ignored the event, will propagate." + << item << ignoredGestures; + itemIgnoredGestures[item] += ignoredGestures; + QMap<Qt::GestureType, QGesture *> conflictedGestures; + QList<QList<QGraphicsObject *> > itemsForConflictedGestures; + QHash<QGesture *, QGraphicsObject *> normalGestures; + getGestureTargets(ignoredGestures, viewport, + &conflictedGestures, &itemsForConflictedGestures, + &normalGestures); + QSet<QGraphicsObject *> itemsSet = targetItems.toSet(); + for (int k = 0; k < itemsForConflictedGestures.size(); ++k) + itemsSet += itemsForConflictedGestures.at(k).toSet(); + targetItems = itemsSet.toList(); + qSort(targetItems.begin(), targetItems.end(), qt_closestItemFirst); + alreadyIgnoredGestures = conflictedGestures.values(); + DEBUG() << "QGraphicsScenePrivate::gestureEventHandler:" + << "new targets:" << targetItems; + i = -1; // start delivery again + continue; + } + } + + // forget about targets for gestures that have ended + foreach (QGesture *g, allGestures) { + switch (g->state()) { + case Qt::GestureFinished: + case Qt::GestureCanceled: + gestureTargets.remove(g); + break; + default: + break; + } + } +} + QT_END_NAMESPACE #include "moc_qgraphicsscene.cpp" |