Retain collapsed / expanded state.

Question

Retain collapsed / expanded state.

Opened this issue 5 years ago · 2 comments

phimath commented 5 years ago

I'm using the latest master branch. Is there anyway to store the state of which children are expanded?

When I navigate away and back the treeview always rebuilds and resets this.

Answer 1 · 2022-03-25T15:34:10.000Z

Hi, I am using the library too and it would be really great if the expanded state would be remembered.

Answer 2 · 2022-04-01T10:15:52.000Z

I found a solution:

Copy the tree_view.dart and add it locally. In class class TreeViewChildState in build method change AnimatedSize to:

AnimatedSize( curve: Curves.easeIn, duration: const Duration(milliseconds: 400), child:Offstage ( offstage: !isExpanded!, child: Column( mainAxisSize: MainAxisSize.min, children: widget.children, ), ), ),