[TOBAGO-1107] Using a TreeState object instead of "expanded" and "marked" in the tree node tag

• Type: Task
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 1.6.0-beta-1, 2.0.0
• Component/s: Core
• Assignee: Udo Schnurpfeil
• Reporter: Udo Schnurpfeil
• Created: 17/Apr/12 07:53
• Updated: 21/Jul/14 06:07
• Resolved: 09/Jul/14 14:10

Description

The expanded and marked state was saved in the tree model directly since Tobago 1.5.0.
But it turns out, that has some disadvantages:

• to handle the state, you may have to write extra code to save the state
• usually this code is only for presenation (expanded), so you mix data and presentation

So introducing the TreeState. The TreeState shoud be independet from tree model implementations. It saves the path a node, instead of the node themself. This is different to the TreeState of Tobago 1.0.x.