Treeviews
Treeviews are user interface controls and data-structure abstractions used to present hierarchical data in software applications. In data structure terms, a tree is a connected acyclic graph of nodes linked by parent-child relationships. A treeview shows a rooted tree, where every node has a single parent (except the root) and zero or more children. Each node typically contains a data payload and references to its children; many implementations also retain a reference to its parent. The depth of a node is its distance from the root, while the height of the tree is the maximum depth.
Core operations include inserting new nodes, removing nodes, and moving subtrees. Searching for a node usually
Applications include file systems, where folders and files are shown as a hierarchical tree; organization charts,
Performance considerations arise with very large trees: techniques such as virtualization, lazy loading, and efficient update