diff options
Diffstat (limited to 'src/gui/graphicsview/qgraphicsscene.cpp')
| -rw-r--r-- | src/gui/graphicsview/qgraphicsscene.cpp | 627 |
1 files changed, 390 insertions, 237 deletions
diff --git a/src/gui/graphicsview/qgraphicsscene.cpp b/src/gui/graphicsview/qgraphicsscene.cpp index c5e3644..4bc7f4c 100644 --- a/src/gui/graphicsview/qgraphicsscene.cpp +++ b/src/gui/graphicsview/qgraphicsscene.cpp @@ -50,7 +50,7 @@ The class serves as a container for QGraphicsItems. It is used together with QGraphicsView for visualizing graphical items, such as lines, rectangles, text, or even custom items, on a 2D surface. QGraphicsScene is - part of \l{The Graphics View Framework}. + part of the \l{Graphics View Framework}. QGraphicsScene also provides functionality that lets you efficiently determine both the location of items, and for determining what items are @@ -228,6 +228,7 @@ #include <QtCore/qstack.h> #include <QtCore/qtimer.h> #include <QtCore/qvarlengtharray.h> +#include <QtCore/QMetaMethod> #include <QtGui/qapplication.h> #include <QtGui/qdesktopwidget.h> #include <QtGui/qevent.h> @@ -277,8 +278,6 @@ static void _q_hoverFromMouseEvent(QGraphicsSceneHoverEvent *hover, const QGraph hover->setAccepted(mouseEvent->isAccepted()); } -int QGraphicsScenePrivate::changedSignalIndex; - /*! \internal */ @@ -291,13 +290,20 @@ QGraphicsScenePrivate::QGraphicsScenePrivate() updateAll(false), calledEmitUpdated(false), processDirtyItemsEmitted(false), - selectionChanging(0), needSortTopLevelItems(true), holesInTopLevelSiblingIndex(false), topLevelSequentialOrdering(true), scenePosDescendantsUpdatePending(false), stickyFocus(false), hasFocus(false), + lastMouseGrabberItemHasImplicitMouseGrab(false), + allItemsIgnoreHoverEvents(true), + allItemsUseDefaultCursor(true), + painterStateProtection(true), + sortCacheEnabled(false), + allItemsIgnoreTouchEvents(true), + selectionChanging(0), + rectAdjust(2), focusItem(0), lastFocusItem(0), tabFocusFirst(0), @@ -306,16 +312,10 @@ QGraphicsScenePrivate::QGraphicsScenePrivate() activationRefCount(0), childExplicitActivation(0), lastMouseGrabberItem(0), - lastMouseGrabberItemHasImplicitMouseGrab(false), dragDropItem(0), enterWidget(0), lastDropAction(Qt::IgnoreAction), - allItemsIgnoreHoverEvents(true), - allItemsUseDefaultCursor(true), - painterStateProtection(true), - sortCacheEnabled(false), - style(0), - allItemsIgnoreTouchEvents(true) + style(0) { } @@ -329,9 +329,10 @@ void QGraphicsScenePrivate::init() index = new QGraphicsSceneBspTreeIndex(q); // Keep this index so we can check for connected slots later on. - if (!changedSignalIndex) { - changedSignalIndex = signalIndex("changed(QList<QRectF>)"); - } + changedSignalIndex = signalIndex("changed(QList<QRectF>)"); + processDirtyItemsIndex = q->metaObject()->indexOfSlot("_q_processDirtyItems()"); + polishItemsIndex = q->metaObject()->indexOfSlot("_q_polishItems()"); + qApp->d_func()->scene_list.append(q); q->update(); } @@ -689,11 +690,16 @@ void QGraphicsScenePrivate::removeItemHelper(QGraphicsItem *item) if (item == lastMouseGrabberItem) lastMouseGrabberItem = 0; + // Reset the current drop item + if (item == dragDropItem) + dragDropItem = 0; + // Reenable selectionChanged() for individual items --selectionChanging; if (!selectionChanging && selectedItems.size() != oldSelectedItemsSize) emit q->selectionChanged(); +#ifndef QT_NO_GESTURES QHash<QGesture *, QGraphicsObject *>::iterator it; for (it = gestureTargets.begin(); it != gestureTargets.end();) { if (it.value() == item) @@ -701,6 +707,15 @@ void QGraphicsScenePrivate::removeItemHelper(QGraphicsItem *item) else ++it; } + + QGraphicsObject *dummy = static_cast<QGraphicsObject *>(item); + cachedTargetItems.removeOne(dummy); + cachedItemGestures.remove(dummy); + cachedAlreadyDeliveredGestures.remove(dummy); + + foreach (Qt::GestureType gesture, item->d_ptr->gestureContext.keys()) + ungrabGesture(item, gesture); +#endif // QT_NO_GESTURES } /*! @@ -870,8 +885,7 @@ void QGraphicsScenePrivate::removePopup(QGraphicsWidget *widget, bool itemIsDyin ungrabKeyboard(static_cast<QGraphicsItem *>(widget), itemIsDying); } if (!itemIsDying && widget->isVisible()) { - widget->hide(); - widget->QGraphicsItem::d_ptr->explicitlyHidden = 0; + widget->QGraphicsItem::d_ptr->setVisibleHelper(false, /* explicit = */ false); } } } @@ -1168,11 +1182,13 @@ bool QGraphicsScenePrivate::filterEvent(QGraphicsItem *item, QEvent *event) bool QGraphicsScenePrivate::sendEvent(QGraphicsItem *item, QEvent *event) { if (QGraphicsObject *object = item->toGraphicsObject()) { +#ifndef QT_NO_GESTURES QGestureManager *gestureManager = QApplicationPrivate::instance()->gestureManager; if (gestureManager) { if (gestureManager->filterEvent(object, event)) return true; } +#endif // QT_NO_GESTURES } if (filterEvent(item, event)) @@ -1311,14 +1327,16 @@ void QGraphicsScenePrivate::mousePressEventHandler(QGraphicsSceneMouseEvent *mou setFocus = true; break; } - if (item->isEnabled() && ((item->flags() & QGraphicsItem::ItemIsFocusable) && item->d_ptr->mouseSetsFocus)) { + if (item->isEnabled() && ((item->flags() & QGraphicsItem::ItemIsFocusable))) { if (!item->isWidget() || ((QGraphicsWidget *)item)->focusPolicy() & Qt::ClickFocus) { setFocus = true; - if (item != q->focusItem()) + if (item != q->focusItem() && item->d_ptr->mouseSetsFocus) q->setFocusItem(item, Qt::MouseFocusReason); break; } } + if (item->d_ptr->flags & QGraphicsItem::ItemStopsClickFocusPropagation) + break; if (item->isPanel()) break; } @@ -2533,10 +2551,16 @@ void QGraphicsScene::addItem(QGraphicsItem *item) return; } - if (d->unpolishedItems.isEmpty()) - QMetaObject::invokeMethod(this, "_q_polishItems", Qt::QueuedConnection); - d->unpolishedItems.append(item); - item->d_ptr->pendingPolish = true; + // QDeclarativeItems do not rely on initial itemChanged message, as the componentComplete + // function allows far more opportunity for delayed-construction optimization. + if (!item->d_ptr->isDeclarativeItem) { + if (d->unpolishedItems.isEmpty()) { + QMetaMethod method = metaObject()->method(d->polishItemsIndex); + method.invoke(this, Qt::QueuedConnection); + } + d->unpolishedItems.append(item); + item->d_ptr->pendingPolish = true; + } // Detach this item from its parent if the parent's scene is different // from this scene. @@ -2584,6 +2608,11 @@ void QGraphicsScene::addItem(QGraphicsItem *item) d->enableTouchEventsOnViews(); } +#ifndef QT_NO_GESTURES + foreach (Qt::GestureType gesture, item->d_ptr->gestureContext.keys()) + d->grabGesture(item, gesture); +#endif + // Update selection lists if (item->isSelected()) d->selectedItems << item; @@ -3211,7 +3240,10 @@ void QGraphicsScene::update(const QRectF &rect) // Update all views. for (int i = 0; i < d->views.size(); ++i) { QGraphicsView *view = d->views.at(i); - view->d_func()->updateRegion(QRegion(view->mapFromScene(rect).boundingRect())); + if (view->isTransformed()) + view->d_func()->updateRectF(view->viewportTransform().mapRect(rect)); + else + view->d_func()->updateRectF(rect); } } else { d->updatedRects << rect; @@ -3501,10 +3533,12 @@ bool QGraphicsScene::event(QEvent *event) case QEvent::TouchEnd: d->touchEventHandler(static_cast<QTouchEvent *>(event)); break; +#ifndef QT_NO_GESTURES case QEvent::Gesture: case QEvent::GestureOverride: d->gestureEventHandler(static_cast<QGestureEvent *>(event)); break; +#endif // QT_NO_GESTURES default: return QObject::event(event); } @@ -4130,6 +4164,25 @@ void QGraphicsScene::wheelEvent(QGraphicsSceneWheelEvent *wheelEvent) wheelEvent->scenePos(), wheelEvent->widget()); +#ifdef Q_WS_MAC + // On Mac, ignore the event if the first item under the mouse is not the last opened + // popup (or one of its descendant) + if (!d->popupWidgets.isEmpty() && !wheelCandidates.isEmpty() && wheelCandidates.first() != d->popupWidgets.back() && !d->popupWidgets.back()->isAncestorOf(wheelCandidates.first())) { + wheelEvent->accept(); + return; + } +#else + // Find the first popup under the mouse (including the popup's descendants) starting from the last. + // Remove all popups after the one found, or all or them if no popup is under the mouse. + // Then continue with the event. + QList<QGraphicsWidget *>::const_iterator iter = d->popupWidgets.end(); + while (--iter >= d->popupWidgets.begin() && !wheelCandidates.isEmpty()) { + if (wheelCandidates.first() == *iter || (*iter)->isAncestorOf(wheelCandidates.first())) + break; + d->removePopup(*iter); + } +#endif + bool hasSetFocus = false; foreach (QGraphicsItem *item, wheelCandidates) { if (!hasSetFocus && item->isEnabled() @@ -4253,6 +4306,8 @@ static void _q_paintItem(QGraphicsItem *item, QPainter *painter, widgetItem->paintWindowFrame(painter, option, widget); if (painterStateProtection) painter->restore(); + } else if (widgetItem->autoFillBackground()) { + painter->fillRect(option->exposedRect, widgetItem->palette().window()); } widgetItem->paint(painter, option, widget); @@ -4350,11 +4405,6 @@ void QGraphicsScenePrivate::drawItemHelper(QGraphicsItem *item, QPainter *painte bool pixmapFound; QGraphicsItemCache *itemCache = itemd->extraItemCache(); if (cacheMode == QGraphicsItem::ItemCoordinateCache) { - if (itemCache->boundingRect != brect.toRect()) { - itemCache->boundingRect = brect.toRect(); - itemCache->allExposed = true; - itemCache->exposed.clear(); - } pixmapKey = itemCache->key; } else { pixmapKey = itemCache->deviceData.value(widget).key; @@ -4367,19 +4417,24 @@ void QGraphicsScenePrivate::drawItemHelper(QGraphicsItem *item, QPainter *painte if (cacheMode == QGraphicsItem::ItemCoordinateCache) { QSize pixmapSize; bool fixedCacheSize = false; - QRectF brectAligned = brect.toAlignedRect(); + QRect br = brect.toAlignedRect(); if ((fixedCacheSize = itemCache->fixedSize.isValid())) { pixmapSize = itemCache->fixedSize; } else { - pixmapSize = brectAligned.size().toSize(); + pixmapSize = br.size(); } // Create or recreate the pixmap. int adjust = itemCache->fixedSize.isValid() ? 0 : 2; QSize adjustSize(adjust*2, adjust*2); - QRectF br = brectAligned.adjusted(-adjust, -adjust, adjust, adjust); + br.adjust(-adjust, -adjust, adjust, adjust); if (pix.isNull() || (!fixedCacheSize && (pixmapSize + adjustSize) != pix.size())) { pix = QPixmap(pixmapSize + adjustSize); + itemCache->boundingRect = br; + itemCache->exposed.clear(); + itemCache->allExposed = true; + } else if (itemCache->boundingRect != br) { + itemCache->boundingRect = br; itemCache->exposed.clear(); itemCache->allExposed = true; } @@ -4433,10 +4488,10 @@ void QGraphicsScenePrivate::drawItemHelper(QGraphicsItem *item, QPainter *painte // qpixmap-image-transform-pixmap roundtrip. if (newPainterOpacity != oldPainterOpacity) { painter->setOpacity(newPainterOpacity); - painter->drawPixmap(br, pix, QRectF(QPointF(), pix.size())); + painter->drawPixmap(br.topLeft(), pix); painter->setOpacity(oldPainterOpacity); } else { - painter->drawPixmap(br, pix, QRectF(QPointF(), pix.size())); + painter->drawPixmap(br.topLeft(), pix); } return; } @@ -4693,11 +4748,11 @@ void QGraphicsScenePrivate::drawSubtreeRecursive(QGraphicsItem *item, QPainter * if (drawItem) { const QRectF brect = adjustedItemEffectiveBoundingRect(item); ENSURE_TRANSFORM_PTR - QRect viewBoundingRect = translateOnlyTransform ? brect.translated(transformPtr->dx(), transformPtr->dy()).toRect() - : transformPtr->mapRect(brect).toRect(); + QRect viewBoundingRect = translateOnlyTransform ? brect.translated(transformPtr->dx(), transformPtr->dy()).toAlignedRect() + : transformPtr->mapRect(brect).toAlignedRect(); + viewBoundingRect.adjust(-rectAdjust, -rectAdjust, rectAdjust, rectAdjust); if (widget) item->d_ptr->paintedViewBoundingRects.insert(widget, viewBoundingRect); - viewBoundingRect.adjust(-1, -1, 1, 1); drawItem = exposedRegion ? exposedRegion->intersects(viewBoundingRect) : !viewBoundingRect.normalized().isEmpty(); if (!drawItem) { @@ -4718,7 +4773,7 @@ void QGraphicsScenePrivate::drawSubtreeRecursive(QGraphicsItem *item, QPainter * if (item->d_ptr->graphicsEffect && item->d_ptr->graphicsEffect->isEnabled()) { ENSURE_TRANSFORM_PTR; QGraphicsItemPaintInfo info(viewTransform, transformPtr, effectTransform, exposedRegion, widget, &styleOptionTmp, - painter, opacity, wasDirtyParentSceneTransform, drawItem); + painter, opacity, wasDirtyParentSceneTransform, itemHasContents && !itemIsFullyTransparent); QGraphicsEffectSource *source = item->d_ptr->graphicsEffect->d_func()->source; QGraphicsItemEffectSourcePrivate *sourced = static_cast<QGraphicsItemEffectSourcePrivate *> (source->d_func()); @@ -4863,6 +4918,24 @@ void QGraphicsScenePrivate::markDirty(QGraphicsItem *item, const QRectF &rect, b if (updateAll) return; + if (removingItemFromScene && !ignoreOpacity && !item->d_ptr->ignoreOpacity) { + // If any of the item's ancestors ignore opacity, it means that the opacity + // was set to 0 (and the update request has not yet been processed). That + // also means that we have to ignore the opacity for the item itself; otherwise + // things like: parent->setOpacity(0); scene->removeItem(child) won't work. + // Note that we only do this when removing items from the scene. In all other + // cases the ignoreOpacity bit propagates properly in processDirtyItems, but + // since the item is removed immediately it won't be processed there. + QGraphicsItem *p = item->d_ptr->parent; + while (p) { + if (p->d_ptr->ignoreOpacity) { + item->d_ptr->ignoreOpacity = true; + break; + } + p = p->d_ptr->parent; + } + } + if (item->d_ptr->discardUpdateRequest(/*ignoreVisibleBit=*/force, /*ignoreDirtyBit=*/removingItemFromScene || invalidateChildren, /*ignoreOpacity=*/ignoreOpacity)) { @@ -4884,7 +4957,9 @@ void QGraphicsScenePrivate::markDirty(QGraphicsItem *item, const QRectF &rect, b return; if (!processDirtyItemsEmitted) { - QMetaObject::invokeMethod(q_ptr, "_q_processDirtyItems", Qt::QueuedConnection); + QMetaMethod method = q_ptr->metaObject()->method(processDirtyItemsIndex); + method.invoke(q_ptr, Qt::QueuedConnection); +// QMetaObject::invokeMethod(q_ptr, "_q_processDirtyItems", Qt::QueuedConnection); processDirtyItemsEmitted = true; } @@ -4944,34 +5019,29 @@ static inline bool updateHelper(QGraphicsViewPrivate *view, QGraphicsItemPrivate if (itemIsUntransformable) { const QTransform xform = itemq->deviceTransform(viewq->viewportTransform()); if (!item->hasBoundingRegionGranularity) - return view->updateRect(xform.mapRect(rect).toRect()); - return view->updateRegion(xform.map(QRegion(rect.toRect()))); + return view->updateRectF(xform.mapRect(rect)); + return view->updateRegion(rect, xform); } if (item->sceneTransformTranslateOnly && view->identityMatrix) { const qreal dx = item->sceneTransform.dx(); const qreal dy = item->sceneTransform.dy(); - if (!item->hasBoundingRegionGranularity) { - QRectF r(rect); - r.translate(dx - view->horizontalScroll(), dy - view->verticalScroll()); - return view->updateRect(r.toRect()); - } - QRegion r(rect.toRect()); - r.translate(qRound(dx) - view->horizontalScroll(), qRound(dy) - view->verticalScroll()); - return view->updateRegion(r); + QRectF r(rect); + r.translate(dx - view->horizontalScroll(), dy - view->verticalScroll()); + return view->updateRectF(r); } if (!viewq->isTransformed()) { if (!item->hasBoundingRegionGranularity) - return view->updateRect(item->sceneTransform.mapRect(rect).toRect()); - return view->updateRegion(item->sceneTransform.map(QRegion(rect.toRect()))); + return view->updateRectF(item->sceneTransform.mapRect(rect)); + return view->updateRegion(rect, item->sceneTransform); } QTransform xform = item->sceneTransform; xform *= viewq->viewportTransform(); if (!item->hasBoundingRegionGranularity) - return view->updateRect(xform.mapRect(rect).toRect()); - return view->updateRegion(xform.map(QRegion(rect.toRect()))); + return view->updateRectF(xform.mapRect(rect)); + return view->updateRegion(rect, xform); } void QGraphicsScenePrivate::processDirtyItemsRecursive(QGraphicsItem *item, bool dirtyAncestorContainsChildren, @@ -5107,9 +5177,15 @@ void QGraphicsScenePrivate::processDirtyItemsRecursive(QGraphicsItem *item, bool // Process children. if (itemHasChildren && item->d_ptr->dirtyChildren) { + const bool itemClipsChildrenToShape = item->d_ptr->flags & QGraphicsItem::ItemClipsChildrenToShape; + if (itemClipsChildrenToShape) { + // Make sure child updates are clipped to the item's bounding rect. + for (int i = 0; i < views.size(); ++i) + views.at(i)->d_func()->setUpdateClip(item); + } if (!dirtyAncestorContainsChildren) { dirtyAncestorContainsChildren = item->d_ptr->fullUpdatePending - && (item->d_ptr->flags & QGraphicsItem::ItemClipsChildrenToShape); + && itemClipsChildrenToShape; } const bool allChildrenDirty = item->d_ptr->allChildrenDirty; const bool parentIgnoresVisible = item->d_ptr->ignoreVisible; @@ -5132,6 +5208,12 @@ void QGraphicsScenePrivate::processDirtyItemsRecursive(QGraphicsItem *item, bool } processDirtyItemsRecursive(child, dirtyAncestorContainsChildren, opacity); } + + if (itemClipsChildrenToShape) { + // Reset updateClip. + for (int i = 0; i < views.size(); ++i) + views.at(i)->d_func()->setUpdateClip(0); + } } else if (wasDirtyParentSceneTransform) { item->d_ptr->invalidateChildrenSceneTransform(); } @@ -5187,8 +5269,14 @@ void QGraphicsScene::drawItems(QPainter *painter, // Determine view, expose and flags. QGraphicsView *view = widget ? qobject_cast<QGraphicsView *>(widget->parentWidget()) : 0; QRegion *expose = 0; - if (view) + const quint32 oldRectAdjust = d->rectAdjust; + if (view) { expose = &view->d_func()->exposedRegion; + if (view->d_func()->optimizationFlags & QGraphicsView::DontAdjustForAntialiasing) + d->rectAdjust = 1; + else + d->rectAdjust = 2; + } // Find all toplevels, they are already sorted. QList<QGraphicsItem *> topLevelItems; @@ -5201,6 +5289,7 @@ void QGraphicsScene::drawItems(QPainter *painter, } } + d->rectAdjust = oldRectAdjust; // Reset discovery bits. for (int i = 0; i < topLevelItems.size(); ++i) topLevelItems.at(i)->d_ptr->itemDiscovered = 0; @@ -5577,6 +5666,10 @@ bool QGraphicsScene::sendEvent(QGraphicsItem *item, QEvent *event) void QGraphicsScenePrivate::addView(QGraphicsView *view) { views << view; +#ifndef QT_NO_GESTURES + foreach (Qt::GestureType gesture, grabbedGestures.keys()) + view->viewport()->grabGesture(gesture); +#endif } void QGraphicsScenePrivate::removeView(QGraphicsView *view) @@ -5906,45 +5999,52 @@ 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) +#ifndef QT_NO_GESTURES +void QGraphicsScenePrivate::gestureTargetsAtHotSpots(const QSet<QGesture *> &gestures, + Qt::GestureFlag flag, + QHash<QGraphicsObject *, QSet<QGesture *> > *targets, + QSet<QGraphicsObject *> *itemsSet, + QSet<QGesture *> *normal, + QSet<QGesture *> *conflicts) { + QSet<QGesture *> normalGestures; // that are not in conflicted state. 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) { - QGraphicsItem *item = items.at(j); + if (!gesture->hasHotSpot()) + continue; + const Qt::GestureType gestureType = gesture->gestureType(); + QList<QGraphicsItem *> items = itemsAtPosition(QPoint(), gesture->d_func()->sceneHotSpot, 0); + for (int j = 0; j < items.size(); ++j) { + QGraphicsItem *item = items.at(j); - // Check if the item is blocked by a modal panel and use it as - // a target instead of this item. - (void) item->isBlockedByModalPanel(&item); + // Check if the item is blocked by a modal panel and use it as + // a target instead of this item. + (void) item->isBlockedByModalPanel(&item); - if (QGraphicsObject *itemobj = item->toGraphicsObject()) { - QGraphicsItemPrivate *d = item->d_func(); - if (d->gestureContext.contains(gestureType)) { - result.append(itemobj); + if (QGraphicsObject *itemobj = item->toGraphicsObject()) { + QGraphicsItemPrivate *d = item->QGraphicsItem::d_func(); + QMap<Qt::GestureType, Qt::GestureFlags>::const_iterator it = + d->gestureContext.find(gestureType); + if (it != d->gestureContext.end() && (!flag || (it.value() & flag))) { + if (normalGestures.contains(gesture)) { + normalGestures.remove(gesture); + if (conflicts) + conflicts->insert(gesture); + } else { + normalGestures.insert(gesture); } + if (targets) + (*targets)[itemobj].insert(gesture); + if (itemsSet) + (*itemsSet).insert(itemobj); } - // Don't propagate through panels. - if (item->isPanel()) - break; - } - 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); } + // Don't propagate through panels. + if (item->isPanel()) + break; } } + if (normal) + *normal = normalGestures; } void QGraphicsScenePrivate::gestureEventHandler(QGestureEvent *event) @@ -5952,200 +6052,227 @@ void QGraphicsScenePrivate::gestureEventHandler(QGestureEvent *event) QWidget *viewport = event->widget(); if (!viewport) return; + QGraphicsView *graphicsView = qobject_cast<QGraphicsView *>(viewport->parent()); + if (!graphicsView) + return; + QList<QGesture *> allGestures = event->gestures(); DEBUG() << "QGraphicsScenePrivate::gestureEventHandler:" - << "Delivering gestures:" << allGestures; - - typedef QHash<QGraphicsObject *, QList<QGesture *> > GesturesPerItem; - GesturesPerItem gesturesPerItem; + << "Gestures:" << allGestures; QSet<QGesture *> startedGestures; + QPoint delta = viewport->mapFromGlobal(QPoint()); + QTransform toScene = QTransform::fromTranslate(delta.x(), delta.y()) + * graphicsView->viewportTransform().inverted(); foreach (QGesture *gesture, allGestures) { + // cache scene coordinates of the hot spot + if (gesture->hasHotSpot()) { + gesture->d_func()->sceneHotSpot = toScene.map(gesture->hotSpot()); + } else { + gesture->d_func()->sceneHotSpot = QPointF(); + } + 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); + if (!startedGestures.isEmpty()) { + QSet<QGesture *> normalGestures; // that have just one target + QSet<QGesture *> conflictedGestures; // that have multiple possible targets + gestureTargetsAtHotSpots(startedGestures, Qt::GestureFlag(0), &cachedItemGestures, 0, + &normalGestures, &conflictedGestures); + cachedTargetItems = cachedItemGestures.keys(); + qSort(cachedTargetItems.begin(), cachedTargetItems.end(), qt_closestItemFirst); 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); + << "Normal gestures:" << normalGestures + << "Conflicting gestures:" << conflictedGestures; + + // deliver conflicted gestures as override events AND remember + // initial gesture targets + if (!conflictedGestures.isEmpty()) { + for (int i = 0; i < cachedTargetItems.size(); ++i) { + QWeakPointer<QGraphicsObject> item = cachedTargetItems.at(i); + + // get gestures to deliver to the current item + QSet<QGesture *> gestures = conflictedGestures & cachedItemGestures.value(item.data()); + if (gestures.isEmpty()) + continue; + DEBUG() << "QGraphicsScenePrivate::gestureEventHandler:" - << "override was accepted:" - << g << topmost; - ignoredConflictedGestures.remove(g); + << "delivering override to" + << item.data() << gestures; + // send gesture override + QGestureEvent ev(gestures.toList()); + 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); + sendEvent(item.data(), &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); + // mark the item as a gesture target + if (item) { + gestureTargets.insert(g, item.data()); + QHash<QGraphicsObject *, QSet<QGesture *> >::iterator it, e; + it = cachedItemGestures.begin(); + e = cachedItemGestures.end(); + for(; it != e; ++it) + it.value().remove(g); + cachedItemGestures[item.data()].insert(g); + } + DEBUG() << "QGraphicsScenePrivate::gestureEventHandler:" + << "override was accepted:" + << g << item.data(); + } + // remember the first item that received the override event + // as it most likely become a target if noone else accepts + // the override event + if (!gestureTargets.contains(g) && item) + gestureTargets.insert(g, item.data()); + + } + if (conflictedGestures.isEmpty()) + break; } } - // 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; + // remember the initial target item for each gesture that was not in + // the conflicted state. + if (!normalGestures.isEmpty()) { + for (int i = 0; i < cachedTargetItems.size() && !normalGestures.isEmpty(); ++i) { + QGraphicsObject *item = cachedTargetItems.at(i); + + // get gestures to deliver to the current item + foreach (QGesture *g, cachedItemGestures.value(item)) { + if (!gestureTargets.contains(g)) { + gestureTargets.insert(g, item); + normalGestures.remove(g); + } } } - ++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; + // deliver all gesture events + QSet<QGesture *> undeliveredGestures; + QSet<QGesture *> parentPropagatedGestures; + foreach (QGesture *gesture, allGestures) { + if (QGraphicsObject *target = gestureTargets.value(gesture, 0)) { + cachedItemGestures[target].insert(gesture); + cachedTargetItems.append(target); + undeliveredGestures.insert(gesture); + QGraphicsItemPrivate *d = target->QGraphicsItem::d_func(); + const Qt::GestureFlags flags = d->gestureContext.value(gesture->gestureType()); + if (flags & Qt::IgnoredGesturesPropagateToParent) + parentPropagatedGestures.insert(gesture); + } else { + DEBUG() << "QGraphicsScenePrivate::gestureEventHandler:" + << "no target for" << gesture << "at" + << gesture->hotSpot() << gesture->d_func()->sceneHotSpot; } + } + qSort(cachedTargetItems.begin(), cachedTargetItems.end(), qt_closestItemFirst); + for (int i = 0; i < cachedTargetItems.size(); ++i) { + QWeakPointer<QGraphicsObject> receiver = cachedTargetItems.at(i); + QSet<QGesture *> gestures = + undeliveredGestures & cachedItemGestures.value(receiver.data()); + gestures -= cachedAlreadyDeliveredGestures.value(receiver.data()); + if (gestures.isEmpty()) continue; + + cachedAlreadyDeliveredGestures[receiver.data()] += gestures; + const bool isPanel = receiver.data()->isPanel(); + DEBUG() << "QGraphicsScenePrivate::gestureEventHandler:" << "delivering to" - << item << gestures; - QGestureEvent ev(gestures); + << receiver.data() << gestures; + QGestureEvent ev(gestures.toList()); ev.setWidget(event->widget()); - sendEvent(item, &ev); + sendEvent(receiver.data(), &ev); QSet<QGesture *> ignoredGestures; foreach (QGesture *g, gestures) { if (!ev.isAccepted() && !ev.isAccepted(g)) { - ignoredGestures.insert(g); + // if the gesture was ignored by its target, we will update the + // targetItems list with a possible target items (items that + // want to receive partial gestures). + // ### wont' work if the target was destroyed in the event + // we will just stop delivering it. + if (receiver && receiver.data() == gestureTargets.value(g, 0)) + ignoredGestures.insert(g); } else { - if (g->state() == Qt::GestureStarted) - gestureTargets[g] = item; + if (receiver && g->state() == Qt::GestureStarted) { + // someone accepted the propagated initial GestureStarted + // event, let it be the new target for all following events. + gestureTargets[g] = receiver.data(); + } + undeliveredGestures.remove(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(); + if (undeliveredGestures.isEmpty()) + break; + + // ignoredGestures list is only filled when delivering to the gesture + // target item, so it is safe to assume item == target. + if (!ignoredGestures.isEmpty() && !isPanel) { + // look for new potential targets for gestures that were ignored + // and should be propagated. + + QSet<QGraphicsObject *> targetsSet = cachedTargetItems.toSet(); + + if (receiver) { + // first if the gesture should be propagated to parents only + for (QSet<QGesture *>::iterator it = ignoredGestures.begin(); + it != ignoredGestures.end();) { + if (parentPropagatedGestures.contains(*it)) { + QGesture *gesture = *it; + const Qt::GestureType gestureType = gesture->gestureType(); + QGraphicsItem *item = receiver.data(); + while (item) { + if (QGraphicsObject *obj = item->toGraphicsObject()) { + if (item->d_func()->gestureContext.contains(gestureType)) { + targetsSet.insert(obj); + cachedItemGestures[obj].insert(gesture); + } + } + if (item->isPanel()) + break; + item = item->parentItem(); + } + + it = ignoredGestures.erase(it); + continue; + } + ++it; + } + } + + gestureTargetsAtHotSpots(ignoredGestures, Qt::ReceivePartialGestures, + &cachedItemGestures, &targetsSet, 0, 0); + + cachedTargetItems = targetsSet.toList(); + qSort(cachedTargetItems.begin(), cachedTargetItems.end(), qt_closestItemFirst); DEBUG() << "QGraphicsScenePrivate::gestureEventHandler:" - << "new targets:" << targetItems; + << "new targets:" << cachedTargetItems; 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()); + cancelGesturesForChildren(g); } } @@ -6160,13 +6287,18 @@ void QGraphicsScenePrivate::gestureEventHandler(QGestureEvent *event) break; } } + + cachedTargetItems.clear(); + cachedItemGestures.clear(); + cachedAlreadyDeliveredGestures.clear(); } -void QGraphicsScenePrivate::cancelGesturesForChildren(QGesture *original, QWidget *viewport) +void QGraphicsScenePrivate::cancelGesturesForChildren(QGesture *original) { Q_ASSERT(original); QGraphicsItem *originalItem = gestureTargets.value(original); - Q_ASSERT(originalItem); + if (originalItem == 0) // we only act on accepted gestures, which implies it has a target. + return; // iterate over all active gestures and for each find the owner // if the owner is part of our sub-hierarchy, cancel it. @@ -6218,8 +6350,7 @@ void QGraphicsScenePrivate::cancelGesturesForChildren(QGesture *original, QWidge if (!g->hasHotSpot()) continue; - QPoint screenPos = g->hotSpot().toPoint(); - QList<QGraphicsItem *> items = itemsAtPosition(screenPos, QPointF(), viewport); + QList<QGraphicsItem *> items = itemsAtPosition(QPoint(), g->d_func()->sceneHotSpot, 0); for (int j = 0; j < items.size(); ++j) { QGraphicsObject *item = items.at(j)->toGraphicsObject(); if (!item) @@ -6245,6 +6376,28 @@ void QGraphicsScenePrivate::cancelGesturesForChildren(QGesture *original, QWidge } } +void QGraphicsScenePrivate::grabGesture(QGraphicsItem *, Qt::GestureType gesture) +{ + (void)QGestureManager::instance(); // create a gesture manager + if (!grabbedGestures[gesture]++) { + foreach (QGraphicsView *view, views) + view->viewport()->grabGesture(gesture); + } +} + +void QGraphicsScenePrivate::ungrabGesture(QGraphicsItem *item, Qt::GestureType gesture) +{ + // we know this can only be an object + Q_ASSERT(item->d_ptr->isObject); + QGraphicsObject *obj = static_cast<QGraphicsObject *>(item); + QGestureManager::instance()->cleanupCachedGestures(obj, gesture); + if (!--grabbedGestures[gesture]) { + foreach (QGraphicsView *view, views) + view->viewport()->ungrabGesture(gesture); + } +} +#endif // QT_NO_GESTURES + QT_END_NAMESPACE #include "moc_qgraphicsscene.cpp" |