A panel is a both a container and a containee window. It serves mainly
as a geometry management device, but the
'border creates a
container with a border. Unlike a
pane% object, a
panel%
object can be hidden or disabled.
A panel% object has a degenerate placement strategy for
managing its children; it places them all in the upper left corner
and does not stretch any of them. The horizontal-panel%
and vertical-panel% classes provide useful geometry
management.
| (new panel% | | [parent parent] | | | | [ | [style style] | | | | | [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 panel%) |
|
| style : (listof (one-of/c 'border 'deleted)) = null |
| enabled : any/c = #t |
| vert-margin : (integer-in 0 1000) = 0 |
| horiz-margin : (integer-in 0 1000) = 0 |
| border : (integer-in 0 1000) = 0 |
| spacing : (integer-in 0 1000) = 0 |
| | alignment | | : | | | | | | | = | | '(center center) |
|
| 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 |
If the
'border style is specified, the window is created with
a thin border (only in this case, the client size of the panel may be
less than its total size). If
style includes
'deleted, then the panel is created as hidden,
and it does not affect its parent’s geometry; the panel can be made active later by calling
parent’s
add-child method.
For information about the
enabled argument, see
window<%>. For information about the
horiz-margin and
vert-margin
arguments, see
subarea<%>. For information about the
border,
spacing, and
alignment
arguments, see
area-container<%>. For information about the
min-width,
min-height,
stretchable-width, and
stretchable-height arguments, see
area<%>.