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:
“Hope deferred makes the heart sick, but a desire fulfilled is a tree of life.”
—Bible: Hebrew, Proverbs 13:12.
“In order for an individual to partake of the world and contribute to it in a healthy way, he first needs to view that world as a basically kind, friendly, and supportive place. Such an outlook begins to be formed during infancy. It’s essential that the baby establish a fundamental trust in his environment. The infant needs to learn that the world is a nurturing place where his needs will be met.”
—Saf Lerman (20th century)