* A widget commonly packaged as part of a Widget toolkit for a graphical user interface. See toolbar and dialog box
*A folder in some graphical operating systeminterfaces that provide tools for configuring the system and the drivers. See control panel.
Panels in Widget Toolkits
Panels in Widget toolkits often have no specific graphic characteristics, but are mainly used to group children widgets together. They allow to have a better control on the layout of the widgets.
For example, in this XUL definition, two horizontal "hbox" panels are enclosed in a vertical "vbox" panel, alongside with two buttons. This allows to be sure that the label and the textboxes for the "Login" and the "Password" fields are correctly aligned.
ee also
*Layout managers, used in Widget toolkits, are software components which have the ability to layout widgets by their relative positions without using distance units.
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