widgets/nodes/virtualized_selectable_area library

Classes

MeasureSize

Widget that reports its child's size, but only when it actually changes. Implemented as a RenderObject (RenderProxyBox) so measurement happens during layout instead of scheduling a post-frame callback on every frame, which was a major bottleneck while scrolling large documents.

VirtualizedSelectableArea

Virtualized version of FluentSelectableArea that works with ListView.builder Uses calculated positions instead of RenderBox hit testing for performance