define-layout

define-layout Macro

Summary

Defines new classes of layout.

Package

capi

Signature

define-layout name superclasses slots &rest options

Arguments

`name`⇩	A symbol.
`superclasses`⇩	A list of symbols naming classes.
`slots`⇩	A list of slot specifiers as in defclass.
`options`⇩	Class options as in defclass.

Description

The macro define-layout is used to create new classes of layout. The macro is essentially the same as defclass except that its default superclass is layout. See defclass for a description of name, superclasses, slots and options.

To implement a new class of layout, methods need to be provided for the following generic functions:

interpret-description	Translate the layout's child descriptions.
calculate-constraints	Calculate the constraints for the layout.
calculate-layout	Layout the children of the layout.