GSoC 2023: Outliner Tree Refactoring

[shinbay]

Report Week 5 (June 26 - June 30)

This week’s progress:

• Main branch commits:
  – 89f61015d1: Outliner: Port remaining ID elements to new tree-element code design
  – 4094cd207a: Outliner: Remove isExpandValid() from AbstractTreeElement and its sub-classes
  – 65f40a4e5d: Cleanup: use snake case for outliner class function names
• I worked on refactoring of tree_element_get_icon(), which is a quite different task from the proposed project, but it is also part of #96713 and recommended by my mentor.
  – Replaced tree_element_get_icon_from_id() with using virtual AbstractTreeElement::getIcon()
  – Working branch: Almaz-Shinbay/blender:refactor-tree-element-get-icon

TO-DO for Week 6:

• Continue work on porting other tree elements