sliver_tree/tree_reorder_config library

Declarative reorder configuration: one nullable object instead of a parameter per knob on every constructor.

Passing a non-null TreeReorderConfig IS enabling reorder, and by default that is all the wiring a row needs: TreeReorderConfig.buildDefaultDragHandles installs a long-press drag over the whole row, the way ReorderableListView does. Set it false to place TreeDragHandles yourself, anywhere in the row you like.

Classes

TreeReorderConfig<TKey>

Everything a declarative tree needs to support drag-and-drop reorder.