validDetails {grid} | R Documentation |
This generic hook function is called whenever a grid grob is created
or
edited
via grob
, gTree
, grid.edit
or editGrob
.
This provides an opportunity for customising the validation of a
new class derived from grob (or gTree).
validDetails(x)
x |
A grid grob. |
This function is called by grob
, gTree
,
grid.edit
and editGrob
.
A method should be written for classes derived from grob or gTree
to validate the values of slots specific to the new class.
(e.g., see grid:::validDetails.axis
).
Note that the standard slots for grobs and gTrees are automatically
validated (e.g., vp
, gp
slots for grobs and,
in addition, children
, and childrenvp
slots for
gTrees) so only slots specific to a new class need to be addressed.
The function MUST return the validated grob.
Paul Murrell