Re: :format strings in Custom ending in %h

[Per Abrahamsen]

Richard Stallman <address@hidden> writes:

>     Only the one line patch is necessary.  The rest is about removing
>     redundant but harmless code, and documenting the new behavior.
>
> we can live without removing the redundant code, but documenting the
> change is essential.  can someone write the doc?

Here is a doc change:

*** widget.texi.~1.22.~ 2003-10-24 15:35:50.000000000 +0200
--- widget.texi 2003-10-24 17:59:49.000000000 +0200
***************
*** 1586,1609 ****
  Function to delete a widget.  The function takes one argument, a widget,
  and should remove all traces of the widget from the buffer.
  
  @vindex address@hidden keyword}
  @item :value-create
  Function to expand the @samp{%v} escape in the format string.  It will
  be called with the widget as its argument and should insert a
  representation of the widget's value in the buffer.
  
  @vindex address@hidden keyword}
  @item :value-delete
  Should remove the representation of the widget's value from the buffer.
  It will be called with the widget as its argument.  It doesn't have to
  remove the text, but it should release markers and delete nested widgets
! if such have been used.
! 
! The following predefined function can be used here:
! 
! @defun widget-children-value-delete widget
! Delete all @code{:children} and @code{:buttons} in @var{widget}.
! @end defun
  
  @vindex address@hidden keyword}
  @item :value-get
--- 1586,1616 ----
  Function to delete a widget.  The function takes one argument, a widget,
  and should remove all traces of the widget from the buffer.
  
+ The default value is:
+ 
+ @defun widget-default-delete widget
+ Remove @var{widget} from the buffer.
+ Delete all @code{:children} and @code{:buttons} in @var{widget}.
+ @end defun
+ 
+ In most cases you should not change this value, but instead use
+ @code{:value-delete} to make any additional cleanup.
+ 
  @vindex address@hidden keyword}
  @item :value-create
  Function to expand the @samp{%v} escape in the format string.  It will
  be called with the widget as its argument and should insert a
  representation of the widget's value in the buffer.
  
+ Nested widgets should be listed in @code{:children} or @code{:buttons}
+ to make sure they are automatically deleted.
+ 
  @vindex address@hidden keyword}
  @item :value-delete
  Should remove the representation of the widget's value from the buffer.
  It will be called with the widget as its argument.  It doesn't have to
  remove the text, but it should release markers and delete nested widgets
! if these are not listed in @code{:children} or @code{:buttons}.
  
  @vindex address@hidden keyword}
  @item :value-get