Tree: two highlighted nodes upon mouse click and arrow keyboard move

[Jean-Rubin Leonard]

currently when I click on a node with the mouse and then proceed to navigate away from that node with the keyboard, both the node i had clicked on and the one with the current focus are highlighted. This is counter intuitive as user expect the focus to move when using the keyboard to move around the tree and the highlighting to follow. This behavior can be reproduced in the dijit/tests/test_Tree.html so no test file is attached. JR

[bill]

Yup, it's messed up now. Focus and selected should be independent, and the selected item should be controlled via the selectedItem or path attributes. Will fix along w/#8616.

[bill]

(In [21728]) Decouple concepts of "focused node" and "selected node", so that:

1. A tree doesn't start with any node mark as selected; app needs to call attr("selectedItem", ...) or attr("path", ...). Fixes #8616.
2. Using arrow keys to navigate in a Tree will not change the selected item. Fixes #9953.

I'm unclear what should happen when the user clicks a node (especially when clicking a branch node, which merely opens the node). For now, clicking a node does not select it.

!strict.

[bill]

(In [21730]) Make clicking, double-clicking, or ENTER-keying a TreeNode select it. But clicking/double-clicking an expando node (plus sign) does not select the TreeNode. Still need to add tests. Refs #8616, #9953 !strict.

[bill]

(In [21738]) Keyboard test case for TreeNode focus and selection. Tree still needs mouse tests written, currently there aren't any. Refs #8616, #9953 !strict.

[bill]

(In [21739]) Keyboard test case for TreeNode focus and selection. Tree still needs mouse tests written, currently there aren't any. Refs #8616, #9953 !strict.