diff options
Diffstat (limited to 'src/gui/graphicsview/qgraphicsscene.cpp')
| -rw-r--r-- | src/gui/graphicsview/qgraphicsscene.cpp | 465 |
1 files changed, 447 insertions, 18 deletions
diff --git a/src/gui/graphicsview/qgraphicsscene.cpp b/src/gui/graphicsview/qgraphicsscene.cpp index 0773559..5b0643d 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 @@ -287,6 +294,7 @@ QGraphicsScenePrivate::QGraphicsScenePrivate() needSortTopLevelItems(true), holesInTopLevelSiblingIndex(false), topLevelSequentialOrdering(true), + scenePosDescendantsUpdatePending(false), stickyFocus(false), hasFocus(false), focusItem(0), @@ -481,6 +489,55 @@ void QGraphicsScenePrivate::_q_processDirtyItems() /*! \internal +*/ +void QGraphicsScenePrivate::setScenePosItemEnabled(QGraphicsItem *item, bool enabled) +{ + QGraphicsItem *p = item->d_ptr->parent; + while (p) { + p->d_ptr->scenePosDescendants = enabled; + p = p->d_ptr->parent; + } + if (!enabled && !scenePosDescendantsUpdatePending) { + scenePosDescendantsUpdatePending = true; + QMetaObject::invokeMethod(q_func(), "_q_updateScenePosDescendants", Qt::QueuedConnection); + } +} + +/*! + \internal +*/ +void QGraphicsScenePrivate::registerScenePosItem(QGraphicsItem *item) +{ + scenePosItems.insert(item); + setScenePosItemEnabled(item, true); +} + +/*! + \internal +*/ +void QGraphicsScenePrivate::unregisterScenePosItem(QGraphicsItem *item) +{ + scenePosItems.remove(item); + setScenePosItemEnabled(item, false); +} + +/*! + \internal +*/ +void QGraphicsScenePrivate::_q_updateScenePosDescendants() +{ + foreach (QGraphicsItem *item, scenePosItems) { + QGraphicsItem *p = item->d_ptr->parent; + while (p) { + p->d_ptr->scenePosDescendants = 1; + p = p->d_ptr->parent; + } + } + scenePosDescendantsUpdatePending = false; +} + +/*! + \internal Schedules an item for removal. This function leaves some stale indexes around in the BSP tree if called from the item's destructor; these will @@ -516,8 +573,19 @@ void QGraphicsScenePrivate::removeItemHelper(QGraphicsItem *item) widget->d_func()->fixFocusChainBeforeReparenting(0, 0); } + if (item->flags() & QGraphicsItem::ItemSendsScenePositionChanges) + unregisterScenePosItem(item); + item->d_func()->scene = 0; + //We need to remove all children first because they might use their parent + //attributes (e.g. sceneTransform). + if (!item->d_ptr->inDestructor) { + // Remove all children recursively + for (int i = 0; i < item->d_ptr->children.size(); ++i) + q->removeItem(item->d_ptr->children.at(i)); + } + // Unregister focus proxy. item->d_ptr->resetFocusProxy(); @@ -564,12 +632,6 @@ void QGraphicsScenePrivate::removeItemHelper(QGraphicsItem *item) ++iterator; } - if (!item->d_ptr->inDestructor) { - // Remove all children recursively - for (int i = 0; i < item->d_ptr->children.size(); ++i) - q->removeItem(item->d_ptr->children.at(i)); - } - if (item->isPanel() && item->isVisible() && item->panelModality() != QGraphicsItem::NonModal) leaveModal(item); @@ -684,6 +746,7 @@ void QGraphicsScenePrivate::setFocusItemHelper(QGraphicsItem *item, focusItem = 0; sendEvent(lastFocusItem, &event); +#ifndef QT_NO_IM if (lastFocusItem && (lastFocusItem->flags() & QGraphicsItem::ItemAcceptsInputMethod)) { // Reset any visible preedit text @@ -699,6 +762,7 @@ void QGraphicsScenePrivate::setFocusItemHelper(QGraphicsItem *item, views.at(i)->inputContext()->reset(); } } +#endif //QT_NO_IM } if (item) { @@ -1052,6 +1116,13 @@ bool QGraphicsScenePrivate::filterEvent(QGraphicsItem *item, QEvent *event) */ bool QGraphicsScenePrivate::sendEvent(QGraphicsItem *item, QEvent *event) { + if (QGraphicsObject *object = item->toGraphicsObject()) { + if (qt_gestureManager) { + if (qt_gestureManager->filterEvent(object, event)) + return true; + } + } + if (filterEvent(item, event)) return false; if (filterDescendantEvent(item, event)) @@ -2275,8 +2346,9 @@ void QGraphicsScene::clear() // NB! We have to clear the index before deleting items; otherwise the // index might try to access dangling item pointers. d->index->clear(); - const QList<QGraphicsItem *> items = d->topLevelItems; - qDeleteAll(items); + // NB! QGraphicsScenePrivate::unregisterTopLevelItem() removes items + while (!d->topLevelItems.isEmpty()) + delete d->topLevelItems.first(); Q_ASSERT(d->topLevelItems.isEmpty()); d->lastItemCount = 0; d->allItemsIgnoreHoverEvents = true; @@ -2522,6 +2594,9 @@ void QGraphicsScene::addItem(QGraphicsItem *item) } } + if (item->flags() & QGraphicsItem::ItemSendsScenePositionChanges) + d->registerScenePosItem(item); + // Ensure that newly added items that have subfocus set, gain // focus automatically if there isn't a focus item already. if (!d->focusItem && item != d->lastFocusItem && item->focusItem() == item) @@ -2808,18 +2883,20 @@ void QGraphicsScene::removeItem(QGraphicsItem *item) } /*! - Returns the scene's current focus item, or 0 if no item currently has - focus. + When the scene is active, this functions returns the scene's current focus + item, or 0 if no item currently has focus. When the scene is inactive, this + functions returns the item that will gain input focus when the scene becomes + active. The focus item receives keyboard input when the scene receives a key event. - \sa setFocusItem(), QGraphicsItem::hasFocus() + \sa setFocusItem(), QGraphicsItem::hasFocus(), isActive() */ QGraphicsItem *QGraphicsScene::focusItem() const { Q_D(const QGraphicsScene); - return d->focusItem; + return isActive() ? d->focusItem : d->lastFocusItem; } /*! @@ -3365,6 +3442,10 @@ 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); } @@ -4127,7 +4208,7 @@ static void _q_paintIntoCache(QPixmap *pix, QGraphicsItem *item, const QRegion & QRect br = pixmapExposed.boundingRect(); // Don't use subpixmap if we get a full update. - if (pixmapExposed.isEmpty() || (pixmapExposed.numRects() == 1 && br.contains(pix->rect()))) { + if (pixmapExposed.isEmpty() || (pixmapExposed.rectCount() == 1 && br.contains(pix->rect()))) { pix->fill(Qt::transparent); pixmapPainter.begin(pix); } else { @@ -4470,6 +4551,10 @@ void QGraphicsScenePrivate::drawItemHelper(QGraphicsItem *item, QPainter *painte void QGraphicsScenePrivate::drawItems(QPainter *painter, const QTransform *const viewTransform, QRegion *exposedRegion, QWidget *widget) { + // Make sure we don't have unpolished items before we draw. + if (!unpolishedItems.isEmpty()) + _q_polishItems(); + QRectF exposedSceneRect; if (exposedRegion && indexMethod != QGraphicsScene::NoIndex) { exposedSceneRect = exposedRegion->boundingRect().adjusted(-1, -1, 1, 1); @@ -4555,6 +4640,7 @@ void QGraphicsScenePrivate::drawSubtreeRecursive(QGraphicsItem *item, QPainter * if (itemHasChildren && itemClipsChildrenToShape) ENSURE_TRANSFORM_PTR; +#ifndef QT_NO_GRAPHICSEFFECT if (item->d_ptr->graphicsEffect && item->d_ptr->graphicsEffect->isEnabled()) { ENSURE_TRANSFORM_PTR; QGraphicsItemPaintInfo info(viewTransform, transformPtr, effectTransform, exposedRegion, widget, &styleOptionTmp, @@ -4569,10 +4655,17 @@ void QGraphicsScenePrivate::drawSubtreeRecursive(QGraphicsItem *item, QPainter * else painter->setWorldTransform(*transformPtr); painter->setOpacity(opacity); - item->d_ptr->graphicsEffect->draw(painter, source); + + if (sourced->lastEffectTransform != painter->worldTransform()) { + sourced->lastEffectTransform = painter->worldTransform(); + sourced->invalidateCache(); + } + item->d_ptr->graphicsEffect->draw(painter); painter->setWorldTransform(restoreTransform); sourced->info = 0; - } else { + } else +#endif //QT_NO_GRAPHICSEFFECT + { draw(item, painter, viewTransform, transformPtr, exposedRegion, widget, opacity, effectTransform, wasDirtyParentSceneTransform, drawItem); } @@ -4741,10 +4834,12 @@ void QGraphicsScenePrivate::markDirty(QGraphicsItem *item, const QRectF &rect, b QGraphicsItem *p = item->d_ptr->parent; while (p) { p->d_ptr->dirtyChildren = 1; +#ifndef QT_NO_GRAPHICSEFFECT if (p->d_ptr->graphicsEffect && p->d_ptr->graphicsEffect->isEnabled()) { p->d_ptr->dirty = 1; p->d_ptr->fullUpdatePending = 1; } +#endif //QT_NO_GRAPHICSEFFECT p = p->d_ptr->parent; } } @@ -4886,7 +4981,7 @@ void QGraphicsScenePrivate::processDirtyItemsRecursive(QGraphicsItem *item, bool continue; } - if (item->d_ptr->paintedViewBoundingRectsNeedRepaint && !paintedViewBoundingRect.isEmpty()) { + if (item->d_ptr->paintedViewBoundingRectsNeedRepaint) { paintedViewBoundingRect.translate(viewPrivate->dirtyScrollOffset); if (!viewPrivate->updateRect(paintedViewBoundingRect)) paintedViewBoundingRect = QRect(-1, -1, -1, -1); // Outside viewport. @@ -4986,6 +5081,10 @@ void QGraphicsScene::drawItems(QPainter *painter, const QStyleOptionGraphicsItem options[], QWidget *widget) { Q_D(QGraphicsScene); + // Make sure we don't have unpolished items before we draw. + if (!d->unpolishedItems.isEmpty()) + d->_q_polishItems(); + QTransform viewTransform = painter->worldTransform(); Q_UNUSED(options); @@ -5297,7 +5396,7 @@ void QGraphicsScene::setActivePanel(QGraphicsItem *item) /*! \since 4.4 - Returns the current active window, or 0 if there is no window is currently + Returns the current active window, or 0 if no window is currently active. \sa QGraphicsScene::setActiveWindow() @@ -5699,6 +5798,336 @@ 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->gestures(); + 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) { + QMap<Qt::GestureType, Qt::GestureFlags>::iterator contextit = + gid->gestureContext.find(g->gestureType()); + bool deliver = contextit != gid->gestureContext.end() && + (g->state() == Qt::GestureStarted || + (contextit.value() & Qt::ReceivePartialGestures)); + if (deliver) + 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); + } else { + if (g->state() == Qt::GestureStarted) + gestureTargets[g] = item; + } + } + 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; + } + } + 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) { + switch (g->state()) { + case Qt::GestureFinished: + case Qt::GestureCanceled: + gestureTargets.remove(g); + break; + default: + break; + } + } +} + +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<QGesture *> canceledGestures; + QHash<QGesture *, QGraphicsObject *>::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<QGesture *> almostCanceledGestures = canceledGestures; + QSet<QGesture *>::Iterator setIter; + while (!almostCanceledGestures.isEmpty()) { + QGraphicsObject *target = 0; + QSet<QGesture*> 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<QGesture *> 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<QGraphicsItem *> 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<QGesture *> list; + list << g; + QGestureEvent ev(list); + sendEvent(item, &ev); + if (ev.isAccepted() || ev.isAccepted(g)) + break; // successfully delivered + } + } + } + } + + Q_ASSERT(qt_gestureManager); // it would be very odd if we got called without a manager. + for (setIter = canceledGestures.begin(); setIter != canceledGestures.end(); ++setIter) { + qt_gestureManager->recycle(*setIter); + gestureTargets.remove(*setIter); + } +} + QT_END_NAMESPACE #include "moc_qgraphicsscene.cpp" |