Unified Selection -related Terminology

Selection Scope

Selection scopes allow decoupling of what gets picked and what gets selected. For example, a model selection scope selects all elements in a model when you pick only one of them.

Selection Level

Unified selection API allows having multiple nested selection levels. In all cases lower levels are somehow related to their above level. As a result, changing a level clears selection of all lower levels.

Example:

1. User selects a Model node in the tree. That's selection level 0.
2. Content components react to selection change:
   • Grid shows all model Elements
   • Graphics view highlights all model Elements
   • Property pane shows properties of selected Model
3. User selects one of the Element instances in the grid. That's

selection level 1. 4. Content components react to selection change:

• Grid still shows all model Elements as it reacts only to top level selection.
• Graphics view still highlights all model Elements, but the one in 'selection level 1' is distinguished with a border or a different color.
• Property pane shows properties of the Element selected with 'selection level 1'.

5. Selecting a different node in the tree changes 'selection level 0', thus clearing 'selection level 1'.

Last Updated: 13 June, 2024