The fundamental data type of the Enhanced X-Windows Toolkit. Each widget belongs to one widget class. A widget implements procedures through its widget class structure. See also composite widget , core widget , primitive widget , and shell widget . A widget is a graphic device capable of receiving input from the keyboard and the mouse and communicating with an application or another widget by means of a callback.
Every widget is a member of only one class and always has a window associated with it.
The general group that a specific widget belongs to, otherwise known as the widget type. Physically, it is a pointer to a structure. Synonymous with widget type . See also class . Synonym for window gravity .