![]() Is it possible to implement a true tree view with ? Mostly, yes, but there are limitations and difficulties. In the former, each parent node is separately focusable, and you expect to use Tab/Shift+Tab to navigate between parent nodes but tree views are composite widgets that manage focus, only appearing once in the tab order and using other keys (like the arrow keys) to manipulate focus within. One important secondary difference: the article said that “the standard keyboard interaction is supported automatically”, and this is true for collapsible nested lists, but false for a tree view. This describes the functionality and interaction modes (including all the expected keyboard behaviours), with examples. ![]() make each one a link-but you can’t give parent nodes any other action, which is a fundamental limitation.) (You could make leaf nodes focusable and give them actions-e.g. ![]() The key difference is that in a tree view, every node is focusable and has an action associated with activating it (which for parent nodes might be expanding/collapsing, but need not be), whereas with collapsible nested lists, only parent nodes are focusable, and their action is reserved and limited to expanding and collapsing. The differences are important, and very fiddly to reconcile. This is not what is typically called a tree view: this is collapsible nested lists.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |