diff options
Diffstat (limited to 'src/qml/types/qqmldelegatemodel.cpp')
-rw-r--r-- | src/qml/types/qqmldelegatemodel.cpp | 59 |
1 files changed, 57 insertions, 2 deletions
diff --git a/src/qml/types/qqmldelegatemodel.cpp b/src/qml/types/qqmldelegatemodel.cpp index be479ee17d..4591d42710 100644 --- a/src/qml/types/qqmldelegatemodel.cpp +++ b/src/qml/types/qqmldelegatemodel.cpp @@ -1521,9 +1521,64 @@ void QQmlDelegateModel::_q_dataChanged(const QModelIndex &begin, const QModelInd _q_itemsChanged(begin.row(), end.row() - begin.row() + 1, roles); } -void QQmlDelegateModel::_q_layoutChanged() +void QQmlDelegateModel::_q_layoutAboutToBeChanged(const QList<QPersistentModelIndex> &parents, QAbstractItemModel::LayoutChangeHint hint) { - _q_modelReset(); + Q_D(QQmlDelegateModel); + if (!d->m_complete) + return; + + if (hint == QAbstractItemModel::VerticalSortHint) { + d->m_storedPersistentIndexes.clear(); + if (!parents.contains(d->m_adaptorModel.rootIndex)) + return; + + for (int i = 0; i < d->m_count; ++i) { + const QModelIndex index = d->m_adaptorModel.aim()->index(i, 0, d->m_adaptorModel.rootIndex); + d->m_storedPersistentIndexes.append(index); + } + } else if (hint == QAbstractItemModel::HorizontalSortHint) { + // Ignored + } else { + // Triggers model reset, no preparations for that are needed + } +} + +void QQmlDelegateModel::_q_layoutChanged(const QList<QPersistentModelIndex> &parents, QAbstractItemModel::LayoutChangeHint hint) +{ + Q_D(QQmlDelegateModel); + if (!d->m_complete) + return; + + if (hint == QAbstractItemModel::VerticalSortHint) { + if (!parents.contains(d->m_adaptorModel.rootIndex)) + return; + + for (int i = 0, c = d->m_storedPersistentIndexes.count(); i < c; ++i) { + const QPersistentModelIndex &index = d->m_storedPersistentIndexes.at(i); + if (i == index.row()) + continue; + + QVector<Compositor::Insert> inserts; + QVector<Compositor::Remove> removes; + d->m_compositor.listItemsMoved(&d->m_adaptorModel, i, index.row(), 1, &removes, &inserts); + if (!removes.isEmpty() || !inserts.isEmpty()) { + d->itemsMoved(removes, inserts); + } + } + + d->m_storedPersistentIndexes.clear(); + + // layoutUpdate does not necessarily have any move changes, but it can + // also mean data changes. We can't detect what exactly has changed, so + // just emit it for all items + _q_itemsChanged(0, d->m_count, QVector<int>()); + + } else if (hint == QAbstractItemModel::HorizontalSortHint) { + // Ignored + } else { + // We don't know what's going on, so reset the model + _q_modelReset(); + } } QQmlDelegateModelAttached *QQmlDelegateModel::qmlAttachedProperties(QObject *obj) |