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.

constructor
( new group-box-panel%
[labellabel]
[parentparent]
[ [stylestyle]
[fontfont]
[enabledenabled]
[vert-marginvert-margin]
[horiz-marginhoriz-margin]
[borderborder]
[spacingspacing]
[alignmentalignment]
[min-widthmin-width]
[min-heightmin-height]
[stretchable-widthstretchable-width]
[stretchable-heightstretchable-height]])
→(is-a?/c group-box-panel% )
label:label-string?

parent :
(or/c (is-a?/c frame% )(is-a?/c dialog% )
(is-a?/c panel% )(is-a?/c pane% ))
style:(listof (or/c 'deleted))=null
font:(is-a?/c font% )=small-control-font
enabled:any/c =#t
vert-margin:spacing-integer? =2
horiz-margin:spacing-integer? =2
border:spacing-integer? =0
spacing:spacing-integer? =0

alignment :
(list/c (or/c 'left'center'right)
(or/c 'top'center'bottom))
= '(centertop)
min-width:(or/c dimension-integer? #f)=#f
min-height:(or/c dimension-integer? #f)=#f
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<%> .

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