diff options
| -rw-r--r-- | src/gui/graphicsview/qgraphicsanchorlayout_p.cpp | 40 |
1 files changed, 34 insertions, 6 deletions
diff --git a/src/gui/graphicsview/qgraphicsanchorlayout_p.cpp b/src/gui/graphicsview/qgraphicsanchorlayout_p.cpp index 3154630..1f1769f 100644 --- a/src/gui/graphicsview/qgraphicsanchorlayout_p.cpp +++ b/src/gui/graphicsview/qgraphicsanchorlayout_p.cpp @@ -416,12 +416,27 @@ void SequentialAnchorData::updateChildrenSizes() const QPair<QGraphicsAnchorLayoutPrivate::Interval, qreal> maxFactor = getFactor(sizeAtMaximum, minSize, prefSize, maxSize); + // XXX This is not safe if Vertex simplification takes place after the sequential + // anchor is created. In that case, "prev" will be a group-vertex, different from + // "from" or "to", that _contains_ one of them. + AnchorVertex *prev = from; + for (int i = 0; i < m_edges.count(); ++i) { AnchorData *e = m_edges.at(i); - e->sizeAtMinimum = interpolate(minFactor, e->minSize, e->prefSize, e->maxSize); - e->sizeAtPreferred = interpolate(prefFactor, e->minSize, e->prefSize, e->maxSize); - e->sizeAtMaximum = interpolate(maxFactor, e->minSize, e->prefSize, e->maxSize); + const bool edgeIsForward = (e->from == prev); + if (edgeIsForward) { + e->sizeAtMinimum = interpolate(minFactor, e->minSize, e->prefSize, e->maxSize); + e->sizeAtPreferred = interpolate(prefFactor, e->minSize, e->prefSize, e->maxSize); + e->sizeAtMaximum = interpolate(maxFactor, e->minSize, e->prefSize, e->maxSize); + prev = e->to; + } else { + Q_ASSERT(prev == e->to); + e->sizeAtMinimum = interpolate(minFactor, e->maxSize, e->prefSize, e->minSize); + e->sizeAtPreferred = interpolate(prefFactor, e->maxSize, e->prefSize, e->minSize); + e->sizeAtMaximum = interpolate(maxFactor, e->maxSize, e->prefSize, e->minSize); + prev = e->from; + } e->updateChildrenSizes(); } @@ -433,11 +448,24 @@ void SequentialAnchorData::calculateSizeHints() prefSize = 0; maxSize = 0; + AnchorVertex *prev = from; + for (int i = 0; i < m_edges.count(); ++i) { AnchorData *edge = m_edges.at(i); - minSize += edge->minSize; - prefSize += edge->prefSize; - maxSize += edge->maxSize; + + const bool edgeIsForward = (edge->from == prev); + if (edgeIsForward) { + minSize += edge->minSize; + prefSize += edge->prefSize; + maxSize += edge->maxSize; + prev = edge->to; + } else { + Q_ASSERT(prev == edge->to); + minSize -= edge->maxSize; + prefSize -= edge->prefSize; + maxSize -= edge->minSize; + prev = edge->from; + } } // See comment in AnchorData::refreshSizeHints() about sizeAt* values |