diff options
Diffstat (limited to 'src/widgets/itemviews/qheaderview.cpp')
-rw-r--r-- | src/widgets/itemviews/qheaderview.cpp | 88 |
1 files changed, 67 insertions, 21 deletions
diff --git a/src/widgets/itemviews/qheaderview.cpp b/src/widgets/itemviews/qheaderview.cpp index 585cfddff5..c90a61d4ff 100644 --- a/src/widgets/itemviews/qheaderview.cpp +++ b/src/widgets/itemviews/qheaderview.cpp @@ -351,7 +351,7 @@ void QHeaderView::setModel(QAbstractItemModel *model) if (model == this->model()) return; Q_D(QHeaderView); - d->persistentHiddenSections.clear(); + d->layoutChangePersistentSections.clear(); if (d->model && d->model != QAbstractItemModelPrivate::staticEmptyModel()) { if (d->orientation == Qt::Horizontal) { QObject::disconnect(d->model, SIGNAL(columnsInserted(QModelIndex,int,int)), @@ -2160,14 +2160,28 @@ void QHeaderViewPrivate::_q_sectionsAboutToBeChanged() || model->columnCount(root) == 0) return; - if (hiddenSectionSize.count() == 0) - return; + layoutChangePersistentSections.clear(); + layoutChangePersistentSections.reserve(std::min(10, sectionItems.count())); + // after layoutChanged another section can be last stretched section + if (stretchLastSection) { + const int visual = visualIndex(lastSectionLogicalIdx); + sectionItems[visual].size = lastSectionSize; + } + for (int i = 0; i < sectionItems.size(); ++i) { + const auto &s = sectionItems.at(i); + // only add if the section is not default and not visually moved + if (s.size == defaultSectionSize && !s.isHidden && s.resizeMode == globalResizeMode) + continue; - for (int i = 0; i < sectionItems.count(); ++i) - if (isVisualIndexHidden(i)) // ### note that we are using column or row 0 - persistentHiddenSections.append(orientation == Qt::Horizontal - ? model->index(0, logicalIndex(i), root) - : model->index(logicalIndex(i), 0, root)); + // ### note that we are using column or row 0 + layoutChangePersistentSections.append({orientation == Qt::Horizontal + ? model->index(0, logicalIndex(i), root) + : model->index(logicalIndex(i), 0, root), + s}); + + if (layoutChangePersistentSections.size() > 1000) + break; + } } void QHeaderViewPrivate::_q_sectionsChanged() @@ -2175,25 +2189,57 @@ void QHeaderViewPrivate::_q_sectionsChanged() Q_Q(QHeaderView); viewport->update(); - const auto hiddenSections = persistentHiddenSections; - persistentHiddenSections.clear(); - - clear(); - q->initializeSections(); - invalidateCachedSizeHint(); + const auto oldPersistentSections = layoutChangePersistentSections; + layoutChangePersistentSections.clear(); - if (modelIsEmpty()) { + const int newCount = modelSectionCount(); + const int oldCount = sectionItems.size(); + if (newCount == 0) { + clear(); + if (oldCount != 0) + emit q->sectionCountChanged(oldCount, 0); return; } - for (const auto &index : hiddenSections) { - if (index.isValid()) { - const int logical = (orientation == Qt::Horizontal - ? index.column() - : index.row()); - q->setSectionHidden(logical, true); + // adjust section size + if (newCount != oldCount) { + const int min = qBound(0, oldCount, newCount - 1); + q->initializeSections(min, newCount - 1); + } + // reset sections + sectionItems.fill(SectionItem(defaultSectionSize, globalResizeMode), newCount); + + // all hidden sections are in oldPersistentSections + hiddenSectionSize.clear(); + + for (const auto &item : oldPersistentSections) { + const auto &index = item.index; + if (!index.isValid()) + continue; + + const int newLogicalIndex = (orientation == Qt::Horizontal + ? index.column() + : index.row()); + // the new visualIndices are already adjusted / reset by initializeSections() + const int newVisualIndex = visualIndex(newLogicalIndex); + auto &newSection = sectionItems[newVisualIndex]; + newSection = item.section; + + if (newSection.isHidden) { + // otherwise setSectionHidden will return without doing anything + newSection.isHidden = false; + q->setSectionHidden(newLogicalIndex, true); } } + + recalcSectionStartPos(); + length = headerLength(); + + if (stretchLastSection) { + // force rebuild of stretched section later on + lastSectionLogicalIdx = -1; + maybeRestorePrevLastSectionAndStretchLast(); + } } /*! |