diff options
Diffstat (limited to 'src/gui/graphicsview/qgraphicsitem.cpp')
| -rw-r--r-- | src/gui/graphicsview/qgraphicsitem.cpp | 251 |
1 files changed, 165 insertions, 86 deletions
diff --git a/src/gui/graphicsview/qgraphicsitem.cpp b/src/gui/graphicsview/qgraphicsitem.cpp index 1361a89..ed36f87 100644 --- a/src/gui/graphicsview/qgraphicsitem.cpp +++ b/src/gui/graphicsview/qgraphicsitem.cpp @@ -268,6 +268,17 @@ */ /*! + \variable QGraphicsItem::Type + + The type value returned by the virtual type() function in standard + graphics item classes in Qt. All such standard graphics item + classes in Qt are associated with a unique value for Type, + e.g. the value returned by QGraphicsPathItem::type() is 2. + + \snippet doc/src/snippets/code/src_gui_graphicsview_qgraphicsitem.cpp 18 +*/ + +/*! \variable QGraphicsItem::UserType The lowest permitted type value for custom items (subclasses @@ -276,6 +287,8 @@ and declaring a Type enum value. Example: \snippet doc/src/snippets/code/src_gui_graphicsview_qgraphicsitem.cpp 1 + + \note UserType = 65536 */ /*! @@ -798,8 +811,36 @@ void QGraphicsItemPrivate::updateAncestorFlag(QGraphicsItem::GraphicsItemFlag ch return; } - foreach (QGraphicsItem *child, children) - child->d_ptr->updateAncestorFlag(childFlag, flag, enabled, false); + for (int i = 0; i < children.size(); ++i) + children.at(i)->d_ptr->updateAncestorFlag(childFlag, flag, enabled, false); +} + +void QGraphicsItemPrivate::updateAncestorFlags() +{ + int flags = 0; + if (parent) { + // Inherit the parent's ancestor flags. + QGraphicsItemPrivate *pd = parent->d_ptr.data(); + flags = pd->ancestorFlags; + + // Add in flags from the parent. + if (pd->filtersDescendantEvents) + flags |= AncestorFiltersChildEvents; + if (pd->handlesChildEvents) + flags |= AncestorHandlesChildEvents; + if (pd->flags & QGraphicsItem::ItemClipsChildrenToShape) + flags |= AncestorClipsChildren; + if (pd->flags & QGraphicsItem::ItemIgnoresTransformations) + flags |= AncestorIgnoresTransformations; + } + + if (ancestorFlags == flags) + return; // No change; stop propagation. + ancestorFlags = flags; + + // Propagate to children recursively. + for (int i = 0; i < children.size(); ++i) + children.at(i)->d_ptr->updateAncestorFlags(); } /*! @@ -984,25 +1025,17 @@ QVariant QGraphicsItemPrivate::inputMethodQueryHelper(Qt::InputMethodQuery query prepareGeometryChange) if the item is in its destructor, i.e. inDestructor is 1. */ -void QGraphicsItemPrivate::setParentItemHelper(QGraphicsItem *newParent) +void QGraphicsItemPrivate::setParentItemHelper(QGraphicsItem *newParent, const QVariant *newParentVariant, + const QVariant *thisPointerVariant) { Q_Q(QGraphicsItem); - if (newParent == q) { - qWarning("QGraphicsItem::setParentItem: cannot assign %p as a parent of itself", this); - return; - } - if (newParent == parent) - return; - - const QVariant newParentVariant(q->itemChange(QGraphicsItem::ItemParentChange, - qVariantFromValue<QGraphicsItem *>(newParent))); - newParent = qVariantValue<QGraphicsItem *>(newParentVariant); if (newParent == parent) return; if (scene) { // Deliver the change to the index - scene->d_func()->index->itemChange(q, QGraphicsItem::ItemParentChange, newParentVariant); + if (scene->d_func()->indexMethod != QGraphicsScene::NoIndex) + scene->d_func()->index->itemChange(q, QGraphicsItem::ItemParentChange, newParent); // Disable scene pos notifications for old ancestors if (scenePosDescendants || (flags & QGraphicsItem::ItemSendsScenePositionChanges)) @@ -1020,11 +1053,11 @@ void QGraphicsItemPrivate::setParentItemHelper(QGraphicsItem *newParent) if (!inDestructor) q_ptr->prepareGeometryChange(); - const QVariant thisPointerVariant(qVariantFromValue<QGraphicsItem *>(q)); if (parent) { // Remove from current parent parent->d_ptr->removeChild(q); - parent->itemChange(QGraphicsItem::ItemChildRemovedChange, thisPointerVariant); + if (thisPointerVariant) + parent->itemChange(QGraphicsItem::ItemChildRemovedChange, *thisPointerVariant); } // Update toplevelitem list. If this item is being deleted, its parent @@ -1042,7 +1075,7 @@ void QGraphicsItemPrivate::setParentItemHelper(QGraphicsItem *newParent) QGraphicsItem *p = parent; QGraphicsItem *parentFocusScopeItem = 0; while (p) { - if (p->flags() & QGraphicsItem::ItemIsFocusScope) { + if (p->d_ptr->flags & QGraphicsItem::ItemIsFocusScope) { // If this item's focus scope's focus scope item points // to this item or a descendent, then clear it. QGraphicsItem *fsi = p->d_ptr->focusScopeItem; @@ -1055,6 +1088,10 @@ void QGraphicsItemPrivate::setParentItemHelper(QGraphicsItem *newParent) p = p->d_ptr->parent; } + // Update graphics effect optimization flag + if (newParent && (graphicsEffect || mayHaveChildWithGraphicsEffect)) + newParent->d_ptr->updateChildWithGraphicsEffectFlagRecursively(); + // Update focus scope item ptr in new scope. QGraphicsItem *newFocusScopeItem = subFocusItem ? subFocusItem : parentFocusScopeItem; if (newFocusScopeItem && newParent) { @@ -1063,11 +1100,11 @@ void QGraphicsItemPrivate::setParentItemHelper(QGraphicsItem *newParent) QGraphicsItem *ancestorScope = 0; QGraphicsItem *p = subFocusItem->d_ptr->parent; while (p) { - if (p->flags() & QGraphicsItem::ItemIsFocusScope) + if (p->d_ptr->flags & QGraphicsItem::ItemIsFocusScope) ancestorScope = p; - if (p->isPanel()) + if (p->d_ptr->flags & QGraphicsItem::ItemIsPanel) break; - p = p->parentItem(); + p = p->d_ptr->parent; } if (ancestorScope) newFocusScopeItem = ancestorScope; @@ -1075,7 +1112,7 @@ void QGraphicsItemPrivate::setParentItemHelper(QGraphicsItem *newParent) QGraphicsItem *p = newParent; while (p) { - if (p->flags() & QGraphicsItem::ItemIsFocusScope) { + if (p->d_ptr->flags & QGraphicsItem::ItemIsFocusScope) { p->d_ptr->focusScopeItem = newFocusScopeItem; // Ensure the new item is no longer the subFocusItem. The // only way to set focus on a child of a focus scope is @@ -1089,52 +1126,45 @@ void QGraphicsItemPrivate::setParentItemHelper(QGraphicsItem *newParent) } if ((parent = newParent)) { - bool implicitUpdate = false; if (parent->d_func()->scene && parent->d_func()->scene != scene) { // Move this item to its new parent's scene parent->d_func()->scene->addItem(q); - implicitUpdate = true; } else if (!parent->d_func()->scene && scene) { // Remove this item from its former scene scene->removeItem(q); } parent->d_ptr->addChild(q); - parent->itemChange(QGraphicsItem::ItemChildAddedChange, thisPointerVariant); + if (thisPointerVariant) + parent->itemChange(QGraphicsItem::ItemChildAddedChange, *thisPointerVariant); if (scene) { - if (!implicitUpdate) - scene->d_func()->markDirty(q_ptr); - // Re-enable scene pos notifications for new ancestors if (scenePosDescendants || (flags & QGraphicsItem::ItemSendsScenePositionChanges)) scene->d_func()->setScenePosItemEnabled(q, true); } + // Propagate dirty flags to the new parent + markParentDirty(/*updateBoundingRect=*/true); + // Inherit ancestor flags from the new parent. - updateAncestorFlag(QGraphicsItem::GraphicsItemFlag(-2)); - updateAncestorFlag(QGraphicsItem::GraphicsItemFlag(-1)); - updateAncestorFlag(QGraphicsItem::ItemClipsChildrenToShape); - updateAncestorFlag(QGraphicsItem::ItemIgnoresTransformations); + updateAncestorFlags(); // Update item visible / enabled. - if (parent->isVisible() != visible) { - if (!parent->isVisible() || !explicitlyHidden) - setVisibleHelper(parent->isVisible(), /* explicit = */ false, /* update = */ !implicitUpdate); + if (parent->d_ptr->visible != visible) { + if (!parent->d_ptr->visible || !explicitlyHidden) + setVisibleHelper(parent->d_ptr->visible, /* explicit = */ false, /* update = */ false); } if (parent->isEnabled() != enabled) { - if (!parent->isEnabled() || !explicitlyDisabled) - setEnabledHelper(parent->isEnabled(), /* explicit = */ false, /* update = */ !implicitUpdate); + if (!parent->d_ptr->enabled || !explicitlyDisabled) + setEnabledHelper(parent->d_ptr->enabled, /* explicit = */ false, /* update = */ false); } // Auto-activate if visible and the parent is active. - if (q->isVisible() && parent->isActive()) + if (visible && parent->isActive()) q->setActive(true); } else { // Inherit ancestor flags from the new parent. - updateAncestorFlag(QGraphicsItem::GraphicsItemFlag(-2)); - updateAncestorFlag(QGraphicsItem::GraphicsItemFlag(-1)); - updateAncestorFlag(QGraphicsItem::ItemClipsChildrenToShape); - updateAncestorFlag(QGraphicsItem::ItemIgnoresTransformations); + updateAncestorFlags(); if (!inDestructor) { // Update item visible / enabled. @@ -1142,10 +1172,6 @@ void QGraphicsItemPrivate::setParentItemHelper(QGraphicsItem *newParent) setVisibleHelper(true, /* explicit = */ false); if (!enabled && !explicitlyDisabled) setEnabledHelper(true, /* explicit = */ false); - - // If the item is being deleted, the whole scene will be updated. - if (scene) - scene->d_func()->markDirty(q_ptr); } } @@ -1161,7 +1187,8 @@ void QGraphicsItemPrivate::setParentItemHelper(QGraphicsItem *newParent) } // Deliver post-change notification - q->itemChange(QGraphicsItem::ItemParentHasChanged, newParentVariant); + if (newParentVariant) + q->itemChange(QGraphicsItem::ItemParentHasChanged, *newParentVariant); if (isObject) emit static_cast<QGraphicsObject *>(q)->parentChanged(); @@ -1350,7 +1377,7 @@ QGraphicsItem::~QGraphicsItem() d_ptr->scene->d_func()->removeItemHelper(this); } else { d_ptr->resetFocusProxy(); - d_ptr->setParentItemHelper(0); + setParentItem(0); } #ifndef QT_NO_GRAPHICSEFFECT @@ -1543,21 +1570,36 @@ const QGraphicsObject *QGraphicsItem::toGraphicsObject() const } /*! - Sets this item's parent item to \a parent. If this item already has a - parent, it is first removed from the previous parent. If \a parent is 0, - this item will become a top-level item. + Sets this item's parent item to \a newParent. If this item already + has a parent, it is first removed from the previous parent. If \a + newParent is 0, this item will become a top-level item. - Note that this implicitly adds this graphics item to the scene of - the parent. You should not \l{QGraphicsScene::addItem()}{add} the - item to the scene yourself. + Note that this implicitly adds this graphics item to the scene of + the parent. You should not \l{QGraphicsScene::addItem()}{add} the + item to the scene yourself. - Calling this function on an item that is an ancestor of \a parent have undefined behaviour. + Calling this function on an item that is an ancestor of \a newParent + have undefined behaviour. - \sa parentItem(), childItems() + \sa parentItem(), childItems() */ -void QGraphicsItem::setParentItem(QGraphicsItem *parent) +void QGraphicsItem::setParentItem(QGraphicsItem *newParent) { - d_ptr->setParentItemHelper(parent); + if (newParent == this) { + qWarning("QGraphicsItem::setParentItem: cannot assign %p as a parent of itself", this); + return; + } + if (newParent == d_ptr->parent) + return; + + const QVariant newParentVariant(itemChange(QGraphicsItem::ItemParentChange, + qVariantFromValue<QGraphicsItem *>(newParent))); + newParent = qVariantValue<QGraphicsItem *>(newParentVariant); + if (newParent == d_ptr->parent) + return; + + const QVariant thisPointerVariant(qVariantFromValue<QGraphicsItem *>(this)); + d_ptr->setParentItemHelper(newParent, &newParentVariant, &thisPointerVariant); } /*! @@ -1607,7 +1649,7 @@ bool QGraphicsItem::isWidget() const */ bool QGraphicsItem::isWindow() const { - return isWidget() && (static_cast<const QGraphicsWidget *>(this)->windowType() & Qt::Window); + return d_ptr->isWidget && (static_cast<const QGraphicsWidget *>(this)->windowType() & Qt::Window); } /*! @@ -1644,9 +1686,9 @@ QGraphicsItem::GraphicsItemFlags QGraphicsItem::flags() const void QGraphicsItem::setFlag(GraphicsItemFlag flag, bool enabled) { if (enabled) - setFlags(flags() | flag); + setFlags(GraphicsItemFlags(d_ptr->flags) | flag); else - setFlags(flags() & ~flag); + setFlags(GraphicsItemFlags(d_ptr->flags) & ~flag); } /*! @@ -1693,8 +1735,8 @@ void QGraphicsItem::setFlags(GraphicsItemFlags flags) flags = GraphicsItemFlags(itemChange(ItemFlagsChange, quint32(flags)).toUInt()); if (quint32(d_ptr->flags) == quint32(flags)) return; - if (d_ptr->scene) - d_ptr->scene->d_func()->index->itemChange(this, ItemFlagsChange, quint32(flags)); + if (d_ptr->scene && d_ptr->scene->d_func()->indexMethod != QGraphicsScene::NoIndex) + d_ptr->scene->d_func()->index->itemChange(this, ItemFlagsChange, &flags); // Flags that alter the geometry of the item (or its children). const quint32 geomChangeFlagsMask = (ItemClipsChildrenToShape | ItemClipsToShape | ItemIgnoresTransformations | ItemIsSelectable); @@ -1703,7 +1745,7 @@ void QGraphicsItem::setFlags(GraphicsItemFlags flags) d_ptr->paintedViewBoundingRectsNeedRepaint = 1; // Keep the old flags to compare the diff. - GraphicsItemFlags oldFlags = this->flags(); + GraphicsItemFlags oldFlags = GraphicsItemFlags(d_ptr->flags); // Update flags. d_ptr->flags = flags; @@ -1732,7 +1774,23 @@ void QGraphicsItem::setFlags(GraphicsItemFlags flags) d_ptr->updateAncestorFlag(ItemIgnoresTransformations); } + if ((flags & ItemNegativeZStacksBehindParent) != (oldFlags & ItemNegativeZStacksBehindParent)) { + // NB! We change the flags directly here, so we must also update d_ptr->flags. + // Note that this has do be done before the ItemStacksBehindParent check + // below; otherwise we will loose the change. + + // Update stack-behind. + if (d_ptr->z < qreal(0.0)) + flags |= ItemStacksBehindParent; + else + flags &= ~ItemStacksBehindParent; + d_ptr->flags = flags; + } + if ((flags & ItemStacksBehindParent) != (oldFlags & ItemStacksBehindParent)) { + // NB! This check has to come after the ItemNegativeZStacksBehindParent + // check above. Be careful. + // Ensure child item sorting is up to date when toggling this flag. if (d_ptr->parent) d_ptr->parent->d_ptr->needSortChildren = 1; @@ -1746,10 +1804,6 @@ void QGraphicsItem::setFlags(GraphicsItemFlags flags) d_ptr->scene->d_func()->updateInputMethodSensitivityInViews(); } - if ((flags & ItemNegativeZStacksBehindParent) != (oldFlags & ItemNegativeZStacksBehindParent)) { - // Update stack-behind. - setFlag(ItemStacksBehindParent, d_ptr->z < qreal(0.0)); - } if ((d_ptr->panelModality != NonModal) && d_ptr->scene @@ -2523,7 +2577,9 @@ void QGraphicsItem::setOpacity(qreal opacity) // Update. if (d_ptr->scene) { #ifndef QT_NO_GRAPHICSEFFECT - d_ptr->invalidateGraphicsEffectsRecursively(); + d_ptr->invalidateParentGraphicsEffectsRecursively(); + if (!(d_ptr->flags & ItemDoesntPropagateOpacityToChildren)) + d_ptr->invalidateChildGraphicsEffectsRecursively(QGraphicsItemPrivate::OpacityChanged); #endif //QT_NO_GRAPHICSEFFECT d_ptr->scene->d_func()->markDirty(this, QRectF(), /*invalidateChildren=*/true, @@ -2568,6 +2624,8 @@ void QGraphicsItem::setGraphicsEffect(QGraphicsEffect *effect) if (d_ptr->graphicsEffect) { delete d_ptr->graphicsEffect; d_ptr->graphicsEffect = 0; + } else if (d_ptr->parent) { + d_ptr->parent->d_ptr->updateChildWithGraphicsEffectFlagRecursively(); } if (effect) { @@ -2581,6 +2639,19 @@ void QGraphicsItem::setGraphicsEffect(QGraphicsEffect *effect) } #endif //QT_NO_GRAPHICSEFFECT +void QGraphicsItemPrivate::updateChildWithGraphicsEffectFlagRecursively() +{ +#ifndef QT_NO_GRAPHICSEFFECT + QGraphicsItemPrivate *itemPrivate = this; + do { + // parent chain already notified? + if (itemPrivate->mayHaveChildWithGraphicsEffect) + return; + itemPrivate->mayHaveChildWithGraphicsEffect = 1; + } while ((itemPrivate = itemPrivate->parent ? itemPrivate->parent->d_ptr.data() : 0)); +#endif +} + /*! \internal \since 4.6 @@ -4264,9 +4335,9 @@ void QGraphicsItem::setZValue(qreal z) if (newZ == d_ptr->z) return; - if (d_ptr->scene) { + if (d_ptr->scene && d_ptr->scene->d_func()->indexMethod != QGraphicsScene::NoIndex) { // Z Value has changed, we have to notify the index. - d_ptr->scene->d_func()->index->itemChange(this, ItemZValueChange, newZVariant); + d_ptr->scene->d_func()->index->itemChange(this, ItemZValueChange, &newZ); } d_ptr->z = newZ; @@ -5033,7 +5104,7 @@ int QGraphicsItemPrivate::depth() const \internal */ #ifndef QT_NO_GRAPHICSEFFECT -void QGraphicsItemPrivate::invalidateGraphicsEffectsRecursively() +void QGraphicsItemPrivate::invalidateParentGraphicsEffectsRecursively() { QGraphicsItemPrivate *itemPrivate = this; do { @@ -5045,6 +5116,24 @@ void QGraphicsItemPrivate::invalidateGraphicsEffectsRecursively() } } while ((itemPrivate = itemPrivate->parent ? itemPrivate->parent->d_ptr.data() : 0)); } + +void QGraphicsItemPrivate::invalidateChildGraphicsEffectsRecursively(QGraphicsItemPrivate::InvalidateReason reason) +{ + if (!mayHaveChildWithGraphicsEffect) + return; + + for (int i = 0; i < children.size(); ++i) { + QGraphicsItemPrivate *childPrivate = children.at(i)->d_ptr.data(); + if (reason == OpacityChanged && (childPrivate->flags & QGraphicsItem::ItemIgnoresParentOpacity)) + continue; + if (childPrivate->graphicsEffect) { + childPrivate->notifyInvalidated = 1; + static_cast<QGraphicsItemEffectSourcePrivate *>(childPrivate->graphicsEffect->d_func()->source->d_func())->invalidateCache(); + } + + childPrivate->invalidateChildGraphicsEffectsRecursively(reason); + } +} #endif //QT_NO_GRAPHICSEFFECT /*! @@ -5289,7 +5378,7 @@ void QGraphicsItem::update(const QRectF &rect) // Make sure we notify effects about invalidated source. #ifndef QT_NO_GRAPHICSEFFECT - d_ptr->invalidateGraphicsEffectsRecursively(); + d_ptr->invalidateParentGraphicsEffectsRecursively(); #endif //QT_NO_GRAPHICSEFFECT if (CacheMode(d_ptr->cacheMode) != NoCache) { @@ -7165,7 +7254,9 @@ void QGraphicsItem::prepareGeometryChange() QGraphicsScenePrivate *scenePrivate = d_ptr->scene->d_func(); scenePrivate->index->prepareBoundingRectChange(this); - scenePrivate->markDirty(this, QRectF(), /*invalidateChildren=*/true); + scenePrivate->markDirty(this, QRectF(), /*invalidateChildren=*/true, /*force=*/false, + /*ignoreOpacity=*/ false, /*removingItemFromScene=*/ false, + /*updateBoundingRect=*/true); // For compatibility reasons, we have to update the item's old geometry // if someone is connected to the changed signal or the scene has no views. @@ -7182,19 +7273,7 @@ void QGraphicsItem::prepareGeometryChange() } } - QGraphicsItem *parent = this; - while ((parent = parent->d_ptr->parent)) { - QGraphicsItemPrivate *parentp = parent->d_ptr.data(); - parentp->dirtyChildrenBoundingRect = 1; - // ### Only do this if the parent's effect applies to the entire subtree. - parentp->notifyBoundingRectChanged = 1; -#ifndef QT_NO_GRAPHICSEFFECT - if (parentp->scene && parentp->graphicsEffect) { - parentp->notifyInvalidated = 1; - static_cast<QGraphicsItemEffectSourcePrivate *>(parentp->graphicsEffect->d_func()->source->d_func())->invalidateCache(); - } -#endif - } + d_ptr->markParentDirty(/*updateBoundingRect=*/true); } /*! |