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Code Issues Releases Wiki Activity

Remove hack in MergedProxyModel and use QAbstractProxyModel::modelAboutToBeReset()

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This commit is contained in:
Jonas Kvinge 2020-12-24 12:33:05 +01:00
parent 3ae9092226
commit 057ec49a3e
2 changed files with 13 additions and 8 deletions
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20
src/core/mergedproxymodel.cpp
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@ -100,6 +100,7 @@ void MergedProxyModel::DeleteAllMappings() {
void MergedProxyModel::AddSubModel(const QModelIndex &source_parent, QAbstractItemModel *submodel) {
connect(submodel, SIGNAL(modelAboutToBeReset()), this, SLOT(SubModelAboutToBeReset()));
connect(submodel, SIGNAL(modelReset()), this, SLOT(SubModelReset()));
connect(submodel, SIGNAL(rowsAboutToBeInserted(QModelIndex, int, int)), this, SLOT(RowsAboutToBeInserted(QModelIndex, int, int)));
connect(submodel, SIGNAL(rowsAboutToBeRemoved(QModelIndex, int, int)), this, SLOT(RowsAboutToBeRemoved(QModelIndex, int, int)));
@ -191,20 +192,15 @@ void MergedProxyModel::SourceModelReset() {
}
void MergedProxyModel::SubModelReset() {
void MergedProxyModel::SubModelAboutToBeReset() {
QAbstractItemModel *submodel = qobject_cast<QAbstractItemModel*>(sender());
// TODO: When we require Qt 4.6, use beginResetModel() and endResetModel() in CollectionModel and catch those here
// that will let us do away with this std::numeric_limits<int>::max() hack.
// Remove all the children of the item that got deleted
QModelIndex source_parent = merge_points_.value(submodel);
QModelIndex proxy_parent = mapFromSource(source_parent);
// We can't know how many children it had, since it's already disappeared...
resetting_model_ = submodel;
beginRemoveRows(proxy_parent, 0, std::numeric_limits<int>::max() - 1);
beginRemoveRows(proxy_parent, 0, submodel->rowCount());
endRemoveRows();
resetting_model_ = nullptr;
@ -221,6 +217,15 @@ void MergedProxyModel::SubModelReset() {
}
}
}
void MergedProxyModel::SubModelReset() {
QAbstractItemModel *submodel = static_cast<QAbstractItemModel*>(sender());
QModelIndex source_parent = merge_points_.value(submodel);
QModelIndex proxy_parent = mapFromSource(source_parent);
// "Insert" items from the newly reset submodel
int count = submodel->rowCount();
if (count) {
@ -553,4 +558,3 @@ QModelIndexList MergedProxyModel::mapToSource(const QModelIndexList &proxy_index
return ret;
}

1
src/core/mergedproxymodel.h
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@ -87,6 +87,7 @@ class MergedProxyModel : public QAbstractProxyModel {
private slots:
void SourceModelReset();
void SubModelAboutToBeReset();
void SubModelReset();
void RowsAboutToBeInserted(const QModelIndex &source_parent, int start, int end);