►GUI: Racket Graphics Toolkit
►2 Reference
▼2.1 Windowing Classes
Inherited methods:
from vertical-panel%
get-orientation
set-orientation
from window<%>
accept-drop-files
client->screen
enable
focus
get-client-size
get-cursor
get-handle
get-height
get-label
get-plain-label
get-size
get-width
get-x
get-y
has-focus?
is-enabled?
is-shown?
on-drop-file
on-focus
on-move
on-size
on-subwindow-char
on-subwindow-event
on-superwindow-enable
on-superwindow-show
popup-menu
refresh
screen->client
set-cursor
set-label
show
from area<%>
get-graphical-min-size
get-parent
get-top-level-window
min-height
min-width
stretchable-height
stretchable-width
from subarea<%>
horiz-margin
vert-margin
from area-container<%>
add-child
after-new-child
begin-container-sequence
border
change-children
container-flow-modified
container-size
delete-child
end-container-sequence
get-alignment
get-children
place-children
reflow-container
set-alignment
spacing
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group-box-panel% : class?

  superclass: vertical-panel%

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.

(new group-box-panel% 
  [label label] 
  [parent parent] 
  [[style style] 
  [font font] 
  [enabled enabled] 
  [vert-margin vert-margin] 
  [horiz-margin horiz-margin] 
  [border border] 
  [spacing spacing] 
  [alignment alignment] 
  [min-width min-width] 
  [min-height min-height] 
  [stretchable-width stretchable-width] 
  [stretchable-height stretchable-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 (one-of/c 'deleted)) = null
  font : (is-a?/c font%) = small-control-font
  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
  alignment : 
(list/c (one-of/c 'left 'center 'right)
        (one-of/c 'top 'center 'bottom))
   = '(center top)
  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<%>.

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