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TreeView: fixed disappearing item

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The problem occurs when a child object is no longer claimed by its
former parent. The child tree item is not added back to Document root
even if it is the only instance left, which resulting the child object
disappearing entirely from the tree view.
This commit is contained in:
Zheng, Lei
2017-04-02 11:49:38 +08:00
parent 219f126674
commit 087614afa0
1 changed files with 16 additions and 1 deletions
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17
src/Gui/Tree.cpp
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@@ -1137,8 +1137,23 @@ void DocumentItem::populateItem(DocumentObjectItem *item, bool refresh) {
item->addChild(childItem);
}
}
for(auto childItem : oldItems)
for(auto childItem : oldItems) {
if (childItem->type() == TreeWidget::ObjectType) {
DocumentObjectItem* obj = static_cast<DocumentObjectItem*>(childItem);
// Add the child item back to document root if it is the only
// instance. Now, because of the lazy loading strategy, this may
// not truely be the last instance of the object. It may belong to
// other parents not expanded yet. We don't want to traverse the
// whole tree to confirm that. Just let it be. If the other
// parent(s) later expanded, this child item will be moved from
// root to its parent.
if(obj->myselves->size()==1) {
this->addChild(childItem);
continue;
}
}
delete childItem;
}
}
void DocumentItem::slotChangeObject(const Gui::ViewProviderDocumentObject& view)