Generate TreeViewItems From data

[hugetiny]

Is your feature request related to a problem? Please describe.
I tried adding directory tree like data (Infinite nesting maybe) to nested TreeViewItems ,but don't know how.
Flutter does not contain a 'id' or 'class' property and ‘queryselector’ like method to find the specific widget .So I can't continuously add children in TreeViewItem with directory tree like data

Describe the solution you'd like
Make flat data format or tree like data format to treeViewItems.
data format like this

List flat = [{id: 0, type: folder, name: home, parentId: -1, children: [1, 2, 3, 7]}, {id: 1, type: file, name: fuck1, parentId: 0}, {id: 2, type: file, name: fuck2, parentId: 0}, {id: 3, type: folder, name: 0000, parentId: 0, children: [4, 5]}, {id: 4, type: file, name: fuck3, parentId: 3}, {id: 5, type: folder, name: ODLC, parentId: 3, children: [6]}, {id: 6, type: file, name: fuck4, parentId: 5}, {id: 7, type: folder, name: ODLC, parentId: 0, children: [8]}, {id: 8, type: folder, name: 0000, parentId: 7, children: [9]}, {id: 9, type: file, name: fuck5, parentId: 8}]

the method should like

TreeViewItems.fromData(List flat)

Describe alternatives you've considered
Is buildContext.element.visitAncestorElements method a solution for Infinite nesting data to TreeViewItems ?

[bdlukaa]

Hello!

¹ Maybe Iterable.map method is the way to go? Something like the following:

final items = data.map<TreeViewItem>((e) {
  return TreeViewItem(
    ...,
  );
}).toList();

² You can also try lazy loading items using the lazy property

Flutter does not contain a 'id' or 'class' property and ‘queryselector’ like method to find the specific widget .

you can make use of keys as the id for the item.

---

If the above can not help, could you explain in detail the issue?

[hugetiny]

The Widget structure of "items" in TreeView is nested while the data structure is plain.So map method is not the way to go .
This is a directory tree data .So TreeViewSelectionMode.multiple is necessary and I have to load all the data together ,lazy loading is not a way either.

So which method can i find a specific widget with a key?

[hugetiny]

solved