SAGE2: StickyItems

Attach a sticky item to another to make a chain.

Remove an element from the chain, when the element is moved away

Get items immediately sticking to item

List of items that are not pinned

Get list of items(entire tree rooted at item) sticking to the item

Move and resize, chains of items sticking to the moved item

Move only the items sticking directly to the moved item

Move chains of items sticking to the moved item

Pile sticky item chain so that the items are within the boundaries of the background item, during tiling of partitions, this ensures that the sticky chain of a tile doesn't intrude on another tile

Method to mark item not pinned but having a background item When the item is finally moved away from the background, this itme will have its pin hidden.

Remove an element from the chain, when the element is deleted.