Layer Predicates | ![]() |
These three predicates are used for the ON and FROZEN status of a given layer:
STD-LAYER-VISIBLE-P is a predicate if the given layer is visible or not, if it's ON and not frozen.
STD-LAYER-ON-P is a predicate if the given layer is ON, not OFF.
STD-LAYER-FROZEN-P is a predicate if the given layer is frozen, not thawed.
See also STD-LAYER-MAKE.
(if (not (std-layer-visible-p lay)) (command "'_LAYER" "_ON" lay "_TH" lay "")) (if (std-layer-on-p lay) (command "'_LAYER" "_OFF" lay "")) (if (not (std-layer-frozen-p lay)) (command "'_LAYER" "_FR" lay ""))
layname: a string, a valid layer name
T or Nil.
None
(std-require 'STDTBL)
Defined in STDTBL