diff options
Diffstat (limited to 'src/gui/graphicsview/qgraphicsitem.cpp')
| -rw-r--r-- | src/gui/graphicsview/qgraphicsitem.cpp | 540 |
1 files changed, 376 insertions, 164 deletions
diff --git a/src/gui/graphicsview/qgraphicsitem.cpp b/src/gui/graphicsview/qgraphicsitem.cpp index c5f5889..0f39263 100644 --- a/src/gui/graphicsview/qgraphicsitem.cpp +++ b/src/gui/graphicsview/qgraphicsitem.cpp @@ -533,25 +533,22 @@ QT_BEGIN_NAMESPACE // QRectF::intersects() returns false always if either the source or target // rectangle's width or height are 0. This works around that problem. -static QRectF _q_adjustedRect(const QRectF &rect) -{ - static const qreal p = (qreal)0.00001; - QRectF r = rect; - if (!r.width()) - r.adjust(-p, 0, p, 0); - if (!r.height()) - r.adjust(0, -p, 0, p); - return r; +static inline void _q_adjustRect(QRectF *rect) +{ + Q_ASSERT(rect); + if (!rect->width()) + rect->adjust(-0.00001, 0, 0.00001, 0); + if (!rect->height()) + rect->adjust(0, -0.00001, 0, 0.00001); } -static QRect _q_adjustedRect(const QRect &rect) +static inline void _q_adjustRect(QRect *rect) { - QRect r = rect; - if (!r.width()) - r.adjust(0, 0, 1, 0); - if (!r.height()) - r.adjust(0, 0, 0, 1); - return r; + Q_ASSERT(rect); + if (!rect->width()) + rect->adjust(0, 0, 1, 0); + if (!rect->height()) + rect->adjust(0, 0, 0, 1); } /* @@ -613,6 +610,7 @@ void QGraphicsItemPrivate::updateAncestorFlag(QGraphicsItem::GraphicsItemFlag ch case QGraphicsItem::ItemClipsChildrenToShape: flag = AncestorClipsChildren; enabled = flags & QGraphicsItem::ItemClipsChildrenToShape; + invalidateCachedClipPathRecursively(/*childrenOnly=*/true); break; case QGraphicsItem::ItemIgnoresTransformations: flag = AncestorIgnoresTransformations; @@ -779,9 +777,9 @@ void QGraphicsItemPrivate::setParentItemHelper(QGraphicsItem *newParent, bool de if (newParent == parent) return; - QVariant variant; - qVariantSetValue<QGraphicsItem *>(variant, newParent); - newParent = qVariantValue<QGraphicsItem *>(q->itemChange(QGraphicsItem::ItemParentChange, variant)); + const QVariant newParentVariant(q->itemChange(QGraphicsItem::ItemParentChange, + qVariantFromValue<QGraphicsItem *>(newParent))); + newParent = qVariantValue<QGraphicsItem *>(newParentVariant); if (newParent == parent) return; @@ -799,11 +797,11 @@ void QGraphicsItemPrivate::setParentItemHelper(QGraphicsItem *newParent, bool de if (!deleting) q_ptr->prepareGeometryChange(); + const QVariant thisPointerVariant(qVariantFromValue<QGraphicsItem *>(q)); if (parent) { // Remove from current parent parent->d_ptr->removeChild(q); - qVariantSetValue<QGraphicsItem *>(variant, q); - parent->itemChange(QGraphicsItem::ItemChildRemovedChange, variant); + parent->itemChange(QGraphicsItem::ItemChildRemovedChange, thisPointerVariant); } // Update toplevelitem list. If this item is being deleted, its parent @@ -828,10 +826,9 @@ void QGraphicsItemPrivate::setParentItemHelper(QGraphicsItem *newParent, bool de } parent->d_ptr->addChild(q); - qVariantSetValue<QGraphicsItem *>(variant, q); - parent->itemChange(QGraphicsItem::ItemChildAddedChange, variant); + parent->itemChange(QGraphicsItem::ItemChildAddedChange, thisPointerVariant); if (!implicitUpdate) - updateHelper(); + updateHelper(QRectF(), false, true); // Inherit ancestor flags from the new parent. updateAncestorFlag(QGraphicsItem::GraphicsItemFlag(-1)); @@ -862,7 +859,7 @@ void QGraphicsItemPrivate::setParentItemHelper(QGraphicsItem *newParent, bool de setEnabledHelper(true, /* explicit = */ false); // If the item is being deleted, the whole scene will be updated. - updateHelper(); + updateHelper(QRectF(), false, true); } } @@ -873,10 +870,7 @@ void QGraphicsItemPrivate::setParentItemHelper(QGraphicsItem *newParent, bool de } // Resolve opacity. - if (parent) - resolveEffectiveOpacity(parent->effectiveOpacity()); - else - resolveEffectiveOpacity(1.0); + updateEffectiveOpacity(); // Resolve depth. resolveDepth(parent ? parent->d_ptr->depth : -1); @@ -885,7 +879,7 @@ void QGraphicsItemPrivate::setParentItemHelper(QGraphicsItem *newParent, bool de invalidateSceneTransformCache(); // Deliver post-change notification - q->itemChange(QGraphicsItem::ItemParentHasChanged, qVariantFromValue<QGraphicsItem *>(parent)); + q->itemChange(QGraphicsItem::ItemParentHasChanged, newParentVariant); } /*! @@ -1240,7 +1234,7 @@ void QGraphicsItem::setFlags(GraphicsItemFlags flags) int geomChangeFlagsMask = (ItemClipsChildrenToShape | ItemClipsToShape | ItemIgnoresTransformations); bool fullUpdate = (flags & geomChangeFlagsMask) != (d_ptr->flags & geomChangeFlagsMask); if (fullUpdate) - d_ptr->fullUpdateHelper(); + d_ptr->fullUpdateHelper(false, true); // Keep the old flags to compare the diff. GraphicsItemFlags oldFlags = this->flags(); @@ -1250,12 +1244,8 @@ void QGraphicsItem::setFlags(GraphicsItemFlags flags) // Reresolve effective opacity if the opacity flags change. static const quint32 opacityFlagsMask = ItemIgnoresParentOpacity | ItemDoesntPropagateOpacityToChildren; - if ((flags & opacityFlagsMask) != (oldFlags & opacityFlagsMask)) { - if (QGraphicsItem *p = d_ptr->parent) - d_ptr->resolveEffectiveOpacity(p->effectiveOpacity()); - else - d_ptr->resolveEffectiveOpacity(1.0); - } + if ((flags & opacityFlagsMask) != (oldFlags & opacityFlagsMask)) + d_ptr->updateEffectiveOpacity(); if (!(d_ptr->flags & ItemIsFocusable) && hasFocus()) { // Clear focus on the item if it has focus when the focusable flag @@ -1275,6 +1265,9 @@ void QGraphicsItem::setFlags(GraphicsItemFlags flags) d_ptr->updateAncestorFlag(ItemClipsChildrenToShape); } + if ((flags & ItemClipsToShape) != (oldFlags & ItemClipsToShape)) + d_ptr->invalidateCachedClipPath(); + if ((flags & ItemIgnoresTransformations) != (oldFlags & ItemIgnoresTransformations)) { // Item children clipping changes. Propagate the ancestor flag to // all children. @@ -1282,7 +1275,7 @@ void QGraphicsItem::setFlags(GraphicsItemFlags flags) } // ### Why updateHelper? - d_ptr->updateHelper(); + d_ptr->updateHelper(QRectF(), false, true); // Notify change. itemChange(ItemFlagsHaveChanged, quint32(flags)); @@ -1380,9 +1373,9 @@ QString QGraphicsItem::toolTip() const */ void QGraphicsItem::setToolTip(const QString &toolTip) { - QString newCursor = itemChange(ItemToolTipChange, toolTip).toString(); - d_ptr->setExtra(QGraphicsItemPrivate::ExtraToolTip, toolTip); - itemChange(ItemToolTipHasChanged, toolTip); + const QVariant toolTipVariant(itemChange(ItemToolTipChange, toolTip)); + d_ptr->setExtra(QGraphicsItemPrivate::ExtraToolTip, toolTipVariant.toString()); + itemChange(ItemToolTipHasChanged, toolTipVariant); } #endif // QT_NO_TOOLTIP @@ -1424,9 +1417,8 @@ QCursor QGraphicsItem::cursor() const */ void QGraphicsItem::setCursor(const QCursor &cursor) { - QCursor newCursor = qVariantValue<QCursor>(itemChange(ItemCursorChange, - qVariantFromValue<QCursor>(cursor))); - d_ptr->setExtra(QGraphicsItemPrivate::ExtraCursor, newCursor); + const QVariant cursorVariant(itemChange(ItemCursorChange, qVariantFromValue<QCursor>(cursor))); + d_ptr->setExtra(QGraphicsItemPrivate::ExtraCursor, qVariantValue<QCursor>(cursorVariant)); d_ptr->hasCursor = 1; if (d_ptr->scene) { foreach (QGraphicsView *view, d_ptr->scene->views()) { @@ -1443,7 +1435,7 @@ void QGraphicsItem::setCursor(const QCursor &cursor) } } } - itemChange(ItemCursorHasChanged, qVariantFromValue<QCursor>(newCursor)); + itemChange(ItemCursorHasChanged, cursorVariant); } /*! @@ -1537,7 +1529,9 @@ void QGraphicsItemPrivate::setVisibleHelper(bool newVisible, bool explicitly, bo return; // Modify the property. - newVisible = q_ptr->itemChange(QGraphicsItem::ItemVisibleChange, quint32(newVisible)).toBool(); + const QVariant newVisibleVariant(q_ptr->itemChange(QGraphicsItem::ItemVisibleChange, + quint32(newVisible))); + newVisible = newVisibleVariant.toBool(); if (visible == quint32(newVisible)) return; visible = newVisible; @@ -1584,9 +1578,10 @@ void QGraphicsItemPrivate::setVisibleHelper(bool newVisible, bool explicitly, bo } // Update children with explicitly = false. + const bool updateChildren = update && !(flags & QGraphicsItem::ItemClipsChildrenToShape); foreach (QGraphicsItem *child, children) { if (!newVisible || !child->d_ptr->explicitlyHidden) - child->d_ptr->setVisibleHelper(newVisible, false); + child->d_ptr->setVisibleHelper(newVisible, false, updateChildren); } // Enable subfocus @@ -1598,7 +1593,7 @@ void QGraphicsItemPrivate::setVisibleHelper(bool newVisible, bool explicitly, bo } // Deliver post-change notification. - q_ptr->itemChange(QGraphicsItem::ItemVisibleHasChanged, quint32(visible)); + q_ptr->itemChange(QGraphicsItem::ItemVisibleHasChanged, newVisibleVariant); } /*! @@ -1704,7 +1699,9 @@ void QGraphicsItemPrivate::setEnabledHelper(bool newEnabled, bool explicitly, bo } // Modify the property. - enabled = q_ptr->itemChange(QGraphicsItem::ItemEnabledChange, quint32(newEnabled)).toBool(); + const QVariant newEnabledVariant(q_ptr->itemChange(QGraphicsItem::ItemEnabledChange, + quint32(newEnabled))); + enabled = newEnabledVariant.toBool(); // Schedule redraw. if (update) @@ -1716,7 +1713,7 @@ void QGraphicsItemPrivate::setEnabledHelper(bool newEnabled, bool explicitly, bo } // Deliver post-change notification. - q_ptr->itemChange(QGraphicsItem::ItemEnabledHasChanged, quint32(enabled)); + q_ptr->itemChange(QGraphicsItem::ItemEnabledHasChanged, newEnabledVariant); } /*! @@ -1803,7 +1800,8 @@ void QGraphicsItem::setSelected(bool selected) selected = false; if (d_ptr->selected == selected) return; - bool newSelected = itemChange(ItemSelectedChange, quint32(selected)).toBool(); + const QVariant newSelectedVariant(itemChange(ItemSelectedChange, quint32(selected))); + bool newSelected = newSelectedVariant.toBool(); if (d_ptr->selected == newSelected) return; d_ptr->selected = newSelected; @@ -1823,7 +1821,7 @@ void QGraphicsItem::setSelected(bool selected) } // Deliver post-change notification. - itemChange(QGraphicsItem::ItemSelectedHasChanged, quint32(d_ptr->selected)); + itemChange(QGraphicsItem::ItemSelectedHasChanged, newSelectedVariant); } /*! @@ -1867,6 +1865,9 @@ qreal QGraphicsItem::opacity() const */ qreal QGraphicsItem::effectiveOpacity() const { + if (!d_ptr->hasEffectiveOpacity) + return qreal(1.0); + QVariant effectiveOpacity = d_ptr->extra(QGraphicsItemPrivate::ExtraEffectiveOpacity); return effectiveOpacity.isNull() ? qreal(1.0) : qreal(effectiveOpacity.toDouble()); } @@ -1896,7 +1897,8 @@ qreal QGraphicsItem::effectiveOpacity() const void QGraphicsItem::setOpacity(qreal opacity) { // Notify change. - qreal newOpacity = itemChange(ItemOpacityChange, double(opacity)).toDouble(); + const QVariant newOpacityVariant(itemChange(ItemOpacityChange, double(opacity))); + qreal newOpacity = newOpacityVariant.toDouble(); // Normalize. newOpacity = qBound<qreal>(0.0, newOpacity, 1.0); @@ -2354,19 +2356,22 @@ QPointF QGraphicsItem::scenePos() const the item is also updated; otherwise it is not updated before and after the change. */ -void QGraphicsItemPrivate::setPosHelper(const QPointF &pos, bool update) +void QGraphicsItemPrivate::setPosHelper(const QPointF &pos) { Q_Q(QGraphicsItem); if (this->pos == pos) return; // Notify the item that the position is changing. - QPointF newPos = q->itemChange(QGraphicsItem::ItemPositionChange, pos).toPointF(); + const QVariant newPosVariant(q->itemChange(QGraphicsItem::ItemPositionChange, pos)); + QPointF newPos = newPosVariant.toPointF(); if (newPos == this->pos) return; // Update and repositition. - if (scene && update) { + inSetPosHelper = 1; + updateCachedClipPathFromSetPosHelper(newPos); + if (scene) { fullUpdateHelper(true); q->prepareGeometryChange(); } @@ -2374,7 +2379,8 @@ void QGraphicsItemPrivate::setPosHelper(const QPointF &pos, bool update) invalidateSceneTransformCache(); // Send post-notification. - q->itemChange(QGraphicsItem::ItemPositionHasChanged, newPos); + q->itemChange(QGraphicsItem::ItemPositionHasChanged, newPosVariant); + inSetPosHelper = 0; } /*! @@ -2389,7 +2395,7 @@ void QGraphicsItemPrivate::setPosHelper(const QPointF &pos, bool update) */ void QGraphicsItem::setPos(const QPointF &pos) { - d_ptr->setPosHelper(pos, /* update = */ true); + d_ptr->setPosHelper(pos); } /*! @@ -2516,10 +2522,10 @@ QTransform QGraphicsItem::sceneTransform() const QTransform m; if (d_ptr->hasTransform) { m = transform(); - m *= QTransform::fromTranslate(d_ptr->pos.x(), d_ptr->pos.y()); - } else { - // ### ? QTransform::fromTranslate(d_ptr->pos.x(), d_ptr->pos.y()) - m.translate(d_ptr->pos.x(), d_ptr->pos.y()); + if (!d_ptr->pos.isNull()) + m *= QTransform::fromTranslate(d_ptr->pos.x(), d_ptr->pos.y()); + } else if (!d_ptr->pos.isNull()) { + m = QTransform::fromTranslate(d_ptr->pos.x(), d_ptr->pos.y()); } // Combine with parent and add to cache. @@ -2644,6 +2650,8 @@ QTransform QGraphicsItem::itemTransform(const QGraphicsItem *other, bool *ok) co if (ok) *ok = true; const QPointF &itemPos = d_ptr->pos; + if (itemPos.isNull()) + return d_ptr->hasTransform ? transform() : QTransform(); if (d_ptr->hasTransform) return transform() * QTransform::fromTranslate(itemPos.x(), itemPos.y()); return QTransform::fromTranslate(itemPos.x(), itemPos.y()); @@ -2654,7 +2662,8 @@ QTransform QGraphicsItem::itemTransform(const QGraphicsItem *other, bool *ok) co const QPointF &otherPos = other->d_ptr->pos; if (other->d_ptr->hasTransform) { QTransform otherToParent = other->transform(); - otherToParent *= QTransform::fromTranslate(otherPos.x(), otherPos.y()); + if (!otherPos.isNull()) + otherToParent *= QTransform::fromTranslate(otherPos.x(), otherPos.y()); return otherToParent.inverted(ok); } else { if (ok) @@ -2679,11 +2688,11 @@ QTransform QGraphicsItem::itemTransform(const QGraphicsItem *other, bool *ok) co QTransform itemToParent = QTransform::fromTranslate(itemPos.x(), itemPos.y()); if (hasTr) - itemToParent = transform() * itemToParent; + itemToParent = itemPos.isNull() ? transform() : transform() * itemToParent; QTransform otherToParent = QTransform::fromTranslate(otherPos.x(), otherPos.y()); if (otherHasTr) - otherToParent = other->transform() * otherToParent; + otherToParent = otherPos.isNull() ? other->transform() : other->transform() * otherToParent; return itemToParent * otherToParent.inverted(ok); } @@ -2723,7 +2732,8 @@ QTransform QGraphicsItem::itemTransform(const QGraphicsItem *other, bool *ok) co const QGraphicsItemPrivate *pd = p->d_ptr; if (pd->hasTransform) x *= p->transform(); - x *= QTransform::fromTranslate(pd->pos.x(), pd->pos.y()); + if (!pd->pos.isNull()) + x *= QTransform::fromTranslate(pd->pos.x(), pd->pos.y()); } while ((p = p->d_ptr->parent) && p != root); if (parentOfOther) return x.inverted(ok); @@ -2755,21 +2765,23 @@ void QGraphicsItem::setMatrix(const QMatrix &matrix, bool combine) return; // Notify the item that the matrix is changing. - QVariant variant; - qVariantSetValue<QMatrix>(variant, newTransform.toAffine()); - newTransform = QTransform(qVariantValue<QMatrix>(itemChange(ItemMatrixChange, variant))); + QVariant newTransformVariant(itemChange(ItemMatrixChange, + qVariantFromValue<QMatrix>(newTransform.toAffine()))); + newTransform = QTransform(qVariantValue<QMatrix>(newTransformVariant)); if (oldTransform == newTransform) return; // Update and set the new transformation. - d_ptr->fullUpdateHelper(true); + d_ptr->fullUpdateHelper(true, true); prepareGeometryChange(); d_ptr->hasTransform = !newTransform.isIdentity(); d_ptr->setExtra(QGraphicsItemPrivate::ExtraTransform, newTransform); d_ptr->invalidateSceneTransformCache(); // Send post-notification. - itemChange(ItemTransformHasChanged, newTransform); + // NB! We have to change the value from QMatrix to QTransform. + qVariantSetValue<QTransform>(newTransformVariant, newTransform); + itemChange(ItemTransformHasChanged, newTransformVariant); } /*! @@ -2801,21 +2813,21 @@ void QGraphicsItem::setTransform(const QTransform &matrix, bool combine) return; // Notify the item that the transformation matrix is changing. - QVariant variant; - qVariantSetValue<QTransform>(variant, newTransform); - newTransform = qVariantValue<QTransform>(itemChange(ItemTransformChange, variant)); + const QVariant newTransformVariant(itemChange(ItemTransformChange, + qVariantFromValue<QTransform>(newTransform))); + newTransform = qVariantValue<QTransform>(newTransformVariant); if (oldTransform == newTransform) return; // Update and set the new transformation. - d_ptr->fullUpdateHelper(true); + d_ptr->fullUpdateHelper(true, true); prepareGeometryChange(); d_ptr->hasTransform = !newTransform.isIdentity(); d_ptr->setExtra(QGraphicsItemPrivate::ExtraTransform, newTransform); d_ptr->invalidateSceneTransformCache(); // Send post-notification. - itemChange(ItemTransformHasChanged, newTransform); + itemChange(ItemTransformHasChanged, newTransformVariant); } /*! @@ -2963,7 +2975,8 @@ qreal QGraphicsItem::zValue() const */ void QGraphicsItem::setZValue(qreal z) { - qreal newZ = qreal(itemChange(ItemZValueChange, double(z)).toDouble()); + const QVariant newZVariant(itemChange(ItemZValueChange, double(z))); + qreal newZ = qreal(newZVariant.toDouble()); if (newZ == d_ptr->z) return; d_ptr->z = newZ; @@ -2975,7 +2988,7 @@ void QGraphicsItem::setZValue(qreal z) d_ptr->scene->d_func()->invalidateSortCache(); } - itemChange(ItemZValueHasChanged, double(newZ)); + itemChange(ItemZValueHasChanged, newZVariant); } /*! @@ -3000,7 +3013,9 @@ QRectF QGraphicsItem::childrenBoundingRect() const QRectF childRect; foreach (QGraphicsItem *child, children()) { QPointF childPos = child->pos(); - QTransform matrix = child->transform() * QTransform::fromTranslate(childPos.x(), childPos.y()); + QTransform matrix = child->transform(); + if (!childPos.isNull()) + matrix *= QTransform::fromTranslate(childPos.x(), childPos.y()); childRect |= matrix.mapRect(child->boundingRect() | child->childrenBoundingRect()); } return childRect; @@ -3132,57 +3147,79 @@ bool QGraphicsItem::isClipped() const QPainterPath QGraphicsItem::clipPath() const { Q_D(const QGraphicsItem); - QPainterPath clip; - if (!isClipped()) - return clip; + if (!d->dirtyClipPath) + return d->emptyClipPath ? QPainterPath() : d->cachedClipPath; + if (!isClipped()) { + d_ptr->setCachedClipPath(QPainterPath()); + return d->cachedClipPath; + } + + const QRectF thisBoundingRect(boundingRect()); + if (thisBoundingRect.isEmpty()) { + if (d_ptr->flags & ItemClipsChildrenToShape) + d_ptr->setEmptyCachedClipPathRecursively(); + else + d_ptr->setEmptyCachedClipPath(); + return QPainterPath(); + } + + QPainterPath clip; // Start with the item's bounding rect. - clip.addRect(boundingRect()); + clip.addRect(thisBoundingRect); - bool clipAway = false; if (d->ancestorFlags & QGraphicsItemPrivate::AncestorClipsChildren) { - // Make list of parents up to the farthest ancestor that clips its - // children to its shape. - QVarLengthArray<const QGraphicsItem *, 32> clippingAncestors; - const QGraphicsItem *parent = parentItem(); - const QGraphicsItem *clipOwner = 0; - do { + const QGraphicsItem *parent = this; + const QGraphicsItem *lastParent = this; + + // Intersect any in-between clips starting at the top and moving downwards. + bool foundValidClipPath = false; + while ((parent = parent->d_ptr->parent)) { if (parent->d_ptr->flags & ItemClipsChildrenToShape) { - clippingAncestors.append(parent); - clipOwner = parent; - } - } while ((parent->d_ptr->ancestorFlags & QGraphicsItemPrivate::AncestorClipsChildren) && (parent = parent->parentItem())); + // Map clip to the current parent and intersect with its shape/clipPath + clip = lastParent->itemTransform(parent).map(clip); + if ((foundValidClipPath = !parent->d_ptr->dirtyClipPath && parent->isClipped())) { + if (parent->d_ptr->emptyClipPath) { + if (d_ptr->flags & ItemClipsChildrenToShape) + d_ptr->setEmptyCachedClipPathRecursively(); + else + d_ptr->setEmptyCachedClipPath(); + return QPainterPath(); + } + clip = clip.intersected(parent->d_ptr->cachedClipPath); + if (!(parent->d_ptr->flags & ItemClipsToShape)) + clip = clip.intersected(parent->shape()); + } else { + clip = clip.intersected(parent->shape()); + } - // Start with the topmost clip. - QPainterPath parentClip = clipOwner->shape(); + if (clip.isEmpty()) { + if (d_ptr->flags & ItemClipsChildrenToShape) + d_ptr->setEmptyCachedClipPathRecursively(); + else + d_ptr->setEmptyCachedClipPath(); + return clip; + } + lastParent = parent; + } - // Intersect any in-between clips starting at the bottom and moving - // upwards. - for (int i = clippingAncestors.size() - 2; i >= 0; --i) { - const QGraphicsItem *item = clippingAncestors[i]; - // ### what if itemtransform fails - if (clipOwner) - parentClip = clipOwner->itemTransform(item).map(parentClip); - parentClip = parentClip.intersected(item->shape()); - if (parentClip.isEmpty()) { - clip = parentClip; - clipAway = true; + if (!(parent->d_ptr->ancestorFlags & QGraphicsItemPrivate::AncestorClipsChildren) + || foundValidClipPath) { break; } - clipOwner = item; } - if (!clipAway) { + if (lastParent != this) { + // Map clip back to the item's transform. // ### what if itemtransform fails - clip = clip.intersected(clipOwner->itemTransform(this).map(parentClip)); - if (clip.isEmpty()) - clipAway = true; + clip = lastParent->itemTransform(this).map(clip); } } - if (!clipAway && d->flags & ItemClipsToShape) + if (d->flags & ItemClipsToShape) clip = clip.intersected(shape()); + d_ptr->setCachedClipPath(clip); return clip; } @@ -3271,8 +3308,10 @@ bool QGraphicsItem::collidesWithPath(const QPainterPath &path, Qt::ItemSelection return false; } - QRectF rectA = _q_adjustedRect(boundingRect()); - QRectF rectB = _q_adjustedRect(path.controlPointRect()); + QRectF rectA(boundingRect()); + _q_adjustRect(&rectA); + QRectF rectB(path.controlPointRect()); + _q_adjustRect(&rectB); if (!rectA.intersects(rectB)) { // This we can determine efficiently. If the two rects neither // intersect nor contain eachother, then the two items do not collide. @@ -3281,12 +3320,11 @@ bool QGraphicsItem::collidesWithPath(const QPainterPath &path, Qt::ItemSelection // For further testing, we need this item's shape or bounding rect. QPainterPath thisShape; - if (mode == Qt::IntersectsItemShape || mode == Qt::ContainsItemShape) { + if (mode == Qt::IntersectsItemShape || mode == Qt::ContainsItemShape) thisShape = (isClipped() && !d_ptr->localCollisionHack) ? clipPath() : shape(); - } else { - thisShape.addPolygon(_q_adjustedRect(boundingRect())); - thisShape.closeSubpath(); - } + else + thisShape.addRect(rectA); + if (thisShape == QPainterPath()) { // Empty shape? No collision. return false; @@ -3456,7 +3494,8 @@ QRegion QGraphicsItem::boundingRegion(const QTransform &itemToDeviceTransform) c // into the bitmap, converts the result to a QRegion and scales the region // back to device space with inverse granularity. qreal granularity = boundingRegionGranularity(); - QRect deviceRect = _q_adjustedRect(itemToDeviceTransform.mapRect(boundingRect()).toRect()); + QRect deviceRect = itemToDeviceTransform.mapRect(boundingRect()).toRect(); + _q_adjustRect(&deviceRect); if (granularity == 0.0) return QRegion(deviceRect); @@ -3586,6 +3625,24 @@ void QGraphicsItem::setBoundingRegionGranularity(qreal granularity) /*! \internal + Returns true if we can discard an update request; otherwise false. +*/ +bool QGraphicsItemPrivate::discardUpdateRequest(bool ignoreClipping, + bool ignoreVisibleBit, + bool ignoreDirtyBit) const +{ + // No scene, or if the scene is updating everything, means we have nothing + // to do. The only exception is if the scene tracks the growing scene rect. + return (!visible && !ignoreVisibleBit) + || (dirty && !ignoreDirtyBit) + || !scene + || (scene->d_func()->updateAll && scene->d_func()->hasSceneRect) + || (!ignoreClipping && (childrenClippedToShape() && isClippedAway())) + || (childrenCombineOpacity() && isFullyTransparent()); +} + +/*! + \internal Asks the scene to mark this item's scene rect as dirty, requesting a redraw. This does not invalidate any cache. @@ -3594,31 +3651,16 @@ void QGraphicsItem::setBoundingRegionGranularity(qreal granularity) only case where the item's background should be marked as dirty even when the item isn't visible. */ -void QGraphicsItemPrivate::updateHelper(const QRectF &rect, bool force, bool updateCache) +void QGraphicsItemPrivate::updateHelper(const QRectF &rect, bool force, bool maybeDirtyClipPath) { // No scene, or if the scene is updating everything, means we have nothing // to do. The only exception is if the scene tracks the growing scene rect. - QGraphicsItemCache *cache = maybeExtraItemCache(); - if (dirty && (!updateCache || !cache || cache->allExposed)) - return; - - if (!scene || (scene && scene->d_func()->updateAll && scene->d_func()->hasSceneRect)) + if (discardUpdateRequest(/*ignoreClipping=*/maybeDirtyClipPath, /*ignoreVisibleBit=*/force)) return; - if (updateCache && QGraphicsItem::CacheMode(cacheMode) != QGraphicsItem::NoCache) { - if (rect.isNull()) { - cache->allExposed = true; - cache->exposed.clear(); - } else { - cache->exposed.append(rect); - } - } - - if (!dirty && scene && (visible || force)) { - if (rect.isNull()) - dirty = 1; - scene->itemUpdated(q_ptr, rect); - } + if (rect.isNull()) + dirty = 1; + scene->itemUpdated(q_ptr, rect); } /*! @@ -3626,21 +3668,25 @@ void QGraphicsItemPrivate::updateHelper(const QRectF &rect, bool force, bool upd Propagates updates to \a item and all its children. */ -void QGraphicsItemPrivate::fullUpdateHelper(bool childrenOnly) +void QGraphicsItemPrivate::fullUpdateHelper(bool childrenOnly, bool maybeDirtyClipPath) { - // No scene, or if the scene is updating everything, means we have nothing - // to do. The only exception is if the scene tracks the growing scene rect. - if (!scene || (scene && scene->d_func()->updateAll && scene->d_func()->hasSceneRect)) - return; - if (!childrenOnly && !dirty) - updateHelper(); - if (children.isEmpty() || dirtyChildren) + if (discardUpdateRequest(/*ignoreClipping=*/maybeDirtyClipPath, + /*ignoreVisibleBit=*/false, + /*ignoreDirtyBit=*/true)) { return; - if (flags & QGraphicsItem::ItemClipsChildrenToShape) { - // ### mark all children dirty? + } + + if (!childrenOnly && !dirty) { + // Effectively the same as updateHelper(QRectF(), false, maybeDirtyClipPath). + dirty = 1; + scene->itemUpdated(q_ptr, QRectF()); + } + + if (dirtyChildren || childrenClippedToShape()) { // Unnecessary to update children as well. return; } + if (ancestorFlags & AncestorClipsChildren) { Q_Q(QGraphicsItem); // Check if we can avoid updating all children. @@ -3663,10 +3709,36 @@ void QGraphicsItemPrivate::fullUpdateHelper(bool childrenOnly) } } foreach (QGraphicsItem *child, children) - child->d_ptr->fullUpdateHelper(); + child->d_ptr->fullUpdateHelper(false, maybeDirtyClipPath); dirtyChildren = 1; } +static inline bool allChildrenCombineOpacity(QGraphicsItem *parent) +{ + Q_ASSERT(parent); + if (parent->flags() & QGraphicsItem::ItemDoesntPropagateOpacityToChildren) + return false; + + const QList<QGraphicsItem *> children(parent->childItems()); + for (int i = 0; i < children.size(); ++i) { + if (children.at(i)->flags() & QGraphicsItem::ItemIgnoresParentOpacity) + return false; + } + return true; +} + +void QGraphicsItemPrivate::updateEffectiveOpacity() +{ + Q_Q(QGraphicsItem); + if (parent) { + resolveEffectiveOpacity(parent->effectiveOpacity()); + parent->d_ptr->allChildrenCombineOpacity = ::allChildrenCombineOpacity(parent); + } else { + resolveEffectiveOpacity(1.0); + } + allChildrenCombineOpacity = ::allChildrenCombineOpacity(q); +} + /*! \internal @@ -3691,7 +3763,14 @@ void QGraphicsItemPrivate::resolveEffectiveOpacity(qreal parentEffectiveOpacity) } // Set this item's resolved opacity. - setExtra(ExtraEffectiveOpacity, myEffectiveOpacity); + if (qFuzzyCompare(myEffectiveOpacity, qreal(1.0))) { + // Opaque, unset effective opacity. + hasEffectiveOpacity = 0; + unsetExtra(ExtraEffectiveOpacity); + } else { + hasEffectiveOpacity = 1; + setExtra(ExtraEffectiveOpacity, myEffectiveOpacity); + } // Resolve children always. for (int i = 0; i < children.size(); ++i) @@ -3782,6 +3861,109 @@ void QGraphicsItemPrivate::removeExtraItemCache() unsetExtra(ExtraCacheData); } +void QGraphicsItemPrivate::setEmptyCachedClipPathRecursively(const QRectF &emptyIfOutsideThisRect) +{ + setEmptyCachedClipPath(); + + const bool checkRect = !emptyIfOutsideThisRect.isNull() + && !(flags & QGraphicsItem::ItemClipsChildrenToShape); + for (int i = 0; i < children.size(); ++i) { + if (!checkRect) { + children.at(i)->d_ptr->setEmptyCachedClipPathRecursively(); + continue; + } + + QGraphicsItem *child = children.at(i); + const QRectF rect = child->mapRectFromParent(emptyIfOutsideThisRect); + if (rect.intersects(child->boundingRect())) + child->d_ptr->invalidateCachedClipPathRecursively(false, rect); + else + child->d_ptr->setEmptyCachedClipPathRecursively(rect); + } +} + +void QGraphicsItemPrivate::invalidateCachedClipPathRecursively(bool childrenOnly, const QRectF &emptyIfOutsideThisRect) +{ + if (!childrenOnly) + invalidateCachedClipPath(); + + const bool checkRect = !emptyIfOutsideThisRect.isNull(); + for (int i = 0; i < children.size(); ++i) { + if (!checkRect) { + children.at(i)->d_ptr->invalidateCachedClipPathRecursively(false); + continue; + } + + QGraphicsItem *child = children.at(i); + const QRectF rect = child->mapRectFromParent(emptyIfOutsideThisRect); + if (rect.intersects(child->boundingRect())) + child->d_ptr->invalidateCachedClipPathRecursively(false, rect); + else + child->d_ptr->setEmptyCachedClipPathRecursively(rect); + } +} + +void QGraphicsItemPrivate::updateCachedClipPathFromSetPosHelper(const QPointF &newPos) +{ + Q_ASSERT(inSetPosHelper); + + if (!(ancestorFlags & QGraphicsItemPrivate::AncestorClipsChildren)) + return; // Not clipped by any ancestor. + + // Find closest clip ancestor and transform. + Q_Q(QGraphicsItem); + QTransform thisToParentTransform = hasTransform + ? q->transform() * QTransform::fromTranslate(newPos.x(), newPos.y()) + : QTransform::fromTranslate(newPos.x(), newPos.y()); + QGraphicsItem *clipParent = parent; + while (clipParent && !(clipParent->d_ptr->flags & QGraphicsItem::ItemClipsChildrenToShape)) { + if (clipParent->d_ptr->hasTransform) + thisToParentTransform *= clipParent->transform(); + if (!clipParent->d_ptr->pos.isNull()) { + thisToParentTransform *= QTransform::fromTranslate(clipParent->d_ptr->pos.x(), + clipParent->d_ptr->pos.y()); + } + clipParent = clipParent->d_ptr->parent; + } + + // thisToParentTransform is now the same as q->itemTransform(clipParent), except + // that the new position (which is not yet set on the item) is taken into account. + Q_ASSERT(clipParent); + Q_ASSERT(clipParent->d_ptr->flags & QGraphicsItem::ItemClipsChildrenToShape); + + // From here everything is calculated in clip parent's coordinates. + const QRectF parentBoundingRect(clipParent->boundingRect()); + const QRectF thisBoundingRect(thisToParentTransform.mapRect(q->boundingRect())); + + if (!parentBoundingRect.intersects(thisBoundingRect)) { + // Item is moved outside the clip parent's bounding rect, + // i.e. it is fully clipped and the clip path is empty. + if (flags & QGraphicsItem::ItemClipsChildrenToShape) + setEmptyCachedClipPathRecursively(); + else + setEmptyCachedClipPathRecursively(thisToParentTransform.inverted().mapRect(parentBoundingRect)); + return; + } + + const QPainterPath parentClip(clipParent->isClipped() ? clipParent->clipPath() : clipParent->shape()); + if (parentClip.contains(thisBoundingRect)) + return; // Item is inside the clip parent's shape. No update required. + + const QRectF parentClipRect(parentClip.controlPointRect()); + if (!parentClipRect.intersects(thisBoundingRect)) { + // Item is moved outside the clip parent's shape, + // i.e. it is fully clipped and the clip path is empty. + if (flags & QGraphicsItem::ItemClipsChildrenToShape) + setEmptyCachedClipPathRecursively(); + else + setEmptyCachedClipPathRecursively(thisToParentTransform.inverted().mapRect(parentClipRect)); + } else { + // Item is partially inside the clip parent's shape, + // i.e. the cached clip path must be invalidated. + invalidateCachedClipPathRecursively(false, thisToParentTransform.inverted().mapRect(parentClipRect)); + } +} + /*! \internal @@ -3812,7 +3994,25 @@ bool QGraphicsItemPrivate::isProxyWidget() const */ void QGraphicsItem::update(const QRectF &rect) { - d_ptr->updateHelper(rect, /* force = */ false, /* updateCache = */ true); + if ((rect.isEmpty() && !rect.isNull()) || d_ptr->discardUpdateRequest()) + return; + + if (CacheMode(d_ptr->cacheMode) != NoCache) { + QGraphicsItemCache *cache = d_ptr->maybeExtraItemCache(); + if (!cache || cache->allExposed) + return; + if (rect.isNull()) { + cache->allExposed = true; + cache->exposed.clear(); + } else { + cache->exposed.append(rect); + } + } + + // Effectively the same as updateHelper(rect); + if (rect.isNull()) + d_ptr->dirty = 1; + d_ptr->scene->itemUpdated(this, rect); } /*! @@ -5616,12 +5816,20 @@ void QGraphicsItem::removeFromIndex() */ void QGraphicsItem::prepareGeometryChange() { - if (d_ptr->scene) { - d_ptr->updateHelper(); + if (!d_ptr->scene) + return; - QGraphicsScenePrivate *scenePrivate = d_ptr->scene->d_func(); - scenePrivate->removeFromIndex(this); - } + d_ptr->updateHelper(QRectF(), false, /*maybeDirtyClipPath=*/!d_ptr->inSetPosHelper); + QGraphicsScenePrivate *scenePrivate = d_ptr->scene->d_func(); + scenePrivate->removeFromIndex(this); + + if (d_ptr->inSetPosHelper) + return; + + if (d_ptr->flags & ItemClipsChildrenToShape) + d_ptr->invalidateCachedClipPathRecursively(); + else + d_ptr->invalidateCachedClipPath(); } /*! @@ -8659,13 +8867,17 @@ void QGraphicsItemGroup::addToGroup(QGraphicsItem *item) QTransform oldSceneMatrix = item->sceneTransform(); item->setPos(mapFromItem(item, 0, 0)); item->setParentItem(this); - item->setTransform(oldSceneMatrix - * sceneTransform().inverted() - * QTransform::fromTranslate(-item->x(), -item->y())); + QTransform newItemTransform(oldSceneMatrix); + newItemTransform *= sceneTransform().inverted(); + if (!item->pos().isNull()) + newItemTransform *= QTransform::fromTranslate(-item->x(), -item->y()); + item->setTransform(newItemTransform); item->d_func()->setIsMemberOfGroup(true); prepareGeometryChange(); - d->itemsBoundingRect |= (item->transform() * QTransform::fromTranslate(item->x(), item->y())) - .mapRect(item->boundingRect() | item->childrenBoundingRect()); + QTransform itemTransform(item->transform()); + if (!item->pos().isNull()) + itemTransform *= QTransform::fromTranslate(item->x(), item->y()); + d->itemsBoundingRect |= itemTransform.mapRect(item->boundingRect() | item->childrenBoundingRect()); update(); } |