A tree view or an outline view is a graphical user interface element (widget) that presents a hierarchical view of information. Each item (often called a branch or a node) can have a number of subitems. This is often visualized by indentation in a list.
An item can be expanded to reveal subitems, if any exist, and collapsed to hide subitems.
Tree views are often seen in file manager applications, where they allow the user to navigate the file system directories. They are also used to present hierarchical data, such as an XML document. Extended tree view is the central component of an outliner application.
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Famous quotes containing the words tree and/or view:
“What he loved so much in the plant morphological structure of the tree was that given a fixed mathematical basis, the final evolution was so incalculable.”
—D.H. (David Herbert)
“Where has it gone, the lifetime?
Search me. What’s left is drear.
Unchilded and unwifed, I’m
Able to view that clear:
So final. And so near.”
—Philip Larkin (1922–1986)