Save state of the widgets in the NavigationPane about fluent_ui

[bdlukaa]

You can add an AutomaticKeepAliveMixin mixin to your body widgets. You can also make use of page storage to save the state.

AutomaticKeepAliveClientMixin doesn't work because of the way that NavigationPane works

Recently, NavigationView now uses PageView under the hood to render the body widgets. This enables the usage of AutomaticKeepAliveClientMixin

If you make use of go_router, you can use StatefulShellRoute.

Related #910

[thitlwincoder]

I try this. It work for me.

paneBodyBuilder: (item, body) {
  return body!;
},

[bdlukaa]

Assigning a key to the item may also work