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Code Issues Releases Wiki Activity

SimpleTreeModel: Handle null root

This commit is contained in:
Jonas Kvinge 2024-04-03 21:15:45 +02:00
parent 5f78e1a983
commit f9acfbc224
1 changed files with 4 additions and 2 deletions
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6
src/core/simpletreemodel.h
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@ -99,12 +99,14 @@ QModelIndex SimpleTreeModel<T>::parent(const QModelIndex &idx) const {
template<typename T> template<typename T>
int SimpleTreeModel<T>::rowCount(const QModelIndex &parent) const { int SimpleTreeModel<T>::rowCount(const QModelIndex &parent) const {
T *item = IndexToItem(parent); T *item = IndexToItem(parent);
if (!item) return 0;
return item->children.count(); return item->children.count();
} }
template<typename T> template<typename T>
bool SimpleTreeModel<T>::hasChildren(const QModelIndex &parent) const { bool SimpleTreeModel<T>::hasChildren(const QModelIndex &parent) const {
T *item = IndexToItem(parent); T *item = IndexToItem(parent);
if (!item) return false;
if (item->lazy_loaded) if (item->lazy_loaded)
return !item->children.isEmpty(); return !item->children.isEmpty();
else else
@ -114,13 +116,13 @@ bool SimpleTreeModel<T>::hasChildren(const QModelIndex &parent) const {
template<typename T> template<typename T>
bool SimpleTreeModel<T>::canFetchMore(const QModelIndex &parent) const { bool SimpleTreeModel<T>::canFetchMore(const QModelIndex &parent) const {
T *item = IndexToItem(parent); T *item = IndexToItem(parent);
return !item->lazy_loaded; return item && !item->lazy_loaded;
} }
template<typename T> template<typename T>
void SimpleTreeModel<T>::fetchMore(const QModelIndex &parent) { void SimpleTreeModel<T>::fetchMore(const QModelIndex &parent) {
T *item = IndexToItem(parent); T *item = IndexToItem(parent);
if (!item->lazy_loaded) { if (item && !item->lazy_loaded) {
LazyPopulate(item); LazyPopulate(item);
} }
} }