A group-box panel arranges its subwindows in a single column, but also draws an optional label at the top of the panel and a border around the panel content.
Unlike most panel classes, a group-box panel’s horizontal and vertical margins default to 2.
label : label-string?
enabled : any/c = #t
vert-margin : (integer-in 0 1000) = 2
horiz-margin : (integer-in 0 1000) = 2
border : (integer-in 0 1000) = 0
spacing : (integer-in 0 1000) = 0
min-width : (integer-in 0 10000) = graphical-minimum-width
min-height : (integer-in 0 10000) = graphical-minimum-height
stretchable-width : any/c = #t
stretchable-height : any/c = #t
Creates a group pane whose title is label.
If style includes 'deleted, then the group panel is created as hidden, and it does not affect its parent’s geometry; the group panel can be made active later by calling parent’s add-child method.
The font argument determines the font for the control. For information about the enabled argument, see window<%>. For information about the horiz-margin and vert-margin arguments, see subarea<%>. For information about the min-width, min-height, stretchable-width, and stretchable-height arguments, see area<%>.