Re: 23.0.60; tiny font in Customize button

[Juri Linkov <juri@jurta.org>]

>> Could we use one of those triangles that either points rightward
>> (closed/hidden/folded) or downward (open/shown/unfolded)?
>
> It's certainly doable, assuming someone is up for some widget hackery.
> (The `checkbox' widget in wid-edit.el is probably a good starting point;
> in this case, the checkbox is implemented as a Lisp string that defines
> an xbm image.  A similar method is used in startup.el for the "Don't
> show this again" checkbox.)

I now realized that everything is already in place.  We just need to
put necessary image files to the etc/custom directory.  This is due to
existing code in `widget-visibility-value-create':

    (if (widget-value widget)
	(widget-image-insert widget on "down" "down-pushed")
      (widget-image-insert widget off "right" "right-pushed"))

where strings are image file names for triangle arrows for
collapsed/expanded positions.

I propose to use the following imagery:

down.xpm:
/* XPM */
static char *down[] = {
"10 10 4 1",
" 	c none",
".	c gray90",
"X	c gray45",
"O	c gray75",
"          ",
"........XX",
" ..OOOOXX ",
" ..OOOOXX ",
"  ..OOXX  ",
"  ..OOXX  ",
"   ..XX   ",
"   ..XX   ",
"    .X    ",
"    .X    "};

down-pushed.xpm:
/* XPM */
static char *down_pushed[] = {
"10 10 4 1",
" 	c none",
".	c gray45",
"X	c gray90",
"O	c gray75",
"          ",
"........XX",
" ..OOOOXX ",
" ..OOOOXX ",
"  ..OOXX  ",
"  ..OOXX  ",
"   ..XX   ",
"   ..XX   ",
"    .X    ",
"    .X    "};

right.xpm:
/* XPM */
static char *right[] = {
"10 10 4 1",
" 	c none",
".	c gray90",
"X	c gray45",
"O	c gray75",
"..        ",
"....      ",
"......    ",
"..OO....  ",
"..OOOO....",
"..OOOOXXXX",
"..OOXXXX  ",
"..XXXX    ",
".XXX      ",
".X        "};

right-pushed.xpm:
/* XPM */
static char *right_pushed[] = {
"10 10 4 1",
" 	c none",
".	c gray45",
"X	c gray90",
"O	c gray75",
"..        ",
"....      ",
"......    ",
"..OO....  ",
"..OOOO....",
"..OOOOXXXX",
"..OOXXXX  ",
"..XXXX    ",
".XXX      ",
".X        "};

Also I think that instead of using etc/custom directory it would be
better to put custom image files to etc/images/custom:

Index: lisp/wid-edit.el
===================================================================
RCS file: /sources/emacs/emacs/lisp/wid-edit.el,v
retrieving revision 1.191
diff -u -r1.191 wid-edit.el
--- lisp/wid-edit.el	6 May 2008 07:57:59 -0000	1.191
+++ lisp/wid-edit.el	10 May 2008 00:03:34 -0000
@@ -599,7 +599,7 @@
 ;;; Images.
 
 (defcustom widget-image-directory (file-name-as-directory
-				   (expand-file-name "custom" data-directory))
+				   (expand-file-name "images/custom" data-directory))
   "Where widget button images are located.
 If this variable is nil, widget will try to locate the directory
 automatically."

-- 
Juri Linkov
http://www.jurta.org/emacs/