hi Walter, currently we are unable to implement scroll with in group. we need to load a group member lazy on scroll because there can be a huge amount of data which can takes time to draw the graph (performance issue).
However, neither implement anything regarding virtualization. The code to update the scrollbars (maybe you’ll only have one, the vertical scrollbar?) depends on finding the actual bounds of all of the group’s member parts. You’ll need to determine that bounds even when all of the member parts do not yet exist.
Then you’ll need to make sure that all of the member parts that should exist because their bounds intersect with the group’s “viewport” bounds, actually do exist.