* subr.el (remove-overlays): Make arguments optional.

* wid-edit.el (widget-specify-button): Put evaporate to the
overlay for sample.
(widget-specify-sample): Put evaporate to the overlay for sample.
(widget-specify-doc): Put evaporate to the overlay for documentation.

* etc/NEWS: Write about remove-overlays's arguments.

* man/widget.texi: Add remove-overlays to the example.

6 files changed, 28 insertions, 2 deletions

diff --git a/etc/NEWS b/etc/NEWS
index bc21ab9a997..6ad65268e4f 100644
--- a/etc/NEWS
+++ b/etc/NEWS
@@ -3413,6 +3413,9 @@ using the text properties (esp. the face) of the prompt string.
 ** New function x-send-client-message sends a client message when
 running under X.
 
+** Arguments for remove-overlays are now optional, so that you can remove
+all overlays in the buffer by just calling (remove-overlay). 
+
 ** New packages:
 
 *** The new package gdb-ui.el provides an enhanced graphical interface to
diff --git a/lisp/ChangeLog b/lisp/ChangeLog
index ecf9cfeaf9c..c01308a4e1a 100644
--- a/lisp/ChangeLog
+++ b/lisp/ChangeLog
@@ -1,3 +1,13 @@
+2004-04-28  Masatake YAMATO  <jet@gyve.org>
+
+        * subr.el (remove-overlays): Make arguments
+        optional.
+
+        * wid-edit.el (widget-specify-button): Put evaporate to the 
+        overlay for sample.
+        (widget-specify-sample): Put evaporate to the overlay for sample.
+        (widget-specify-doc): Put evaporate to the overlay for documentation.
+
 2004-04-27  Jesper Harder  <harder@ifa.au.dk>
 
         * info.el (info-apropos): Make it an index node.  Align node names
diff --git a/lisp/subr.el b/lisp/subr.el
index 516b0fc781a..a9acc15606d 100644
--- a/lisp/subr.el
+++ b/lisp/subr.el
@@ -1528,9 +1528,13 @@ If MESSAGE is nil, instructions to type EXIT-CHAR are displayed there."
       (overlay-put o1 (pop props) (pop props)))
     o1))
 
-(defun remove-overlays (beg end name val)
+(defun remove-overlays (&optional beg end name val)
   "Clear BEG and END of overlays whose property NAME has value VAL.
-Overlays might be moved and or split."
+Overlays might be moved and or split.
+If BEG is nil, `(point-min)' is used. If END is nil, `(point-max)' 
+is used."
+  (unless beg (setq beg (point-min)))
+  (unless end (setq end (point-max)))
   (if (< end beg)
       (setq beg (prog1 end (setq end beg))))
   (save-excursion
diff --git a/lisp/wid-edit.el b/lisp/wid-edit.el
index 2392ccdfb47..33f1f06ba9a 100644
--- a/lisp/wid-edit.el
+++ b/lisp/wid-edit.el
@@ -382,6 +382,7 @@ new value.")
       (setq help-echo 'widget-mouse-help))
     (overlay-put overlay 'button widget)
     (overlay-put overlay 'keymap (widget-get widget :keymap))
+    (overlay-put overlay 'evaporate t)
     ;; We want to avoid the face with image buttons.
     (unless (widget-get widget :suppress-face)
       (overlay-put overlay 'face (widget-apply widget :button-face-get))
@@ -401,6 +402,7 @@ new value.")
   "Specify sample for WIDGET between FROM and TO."
   (let ((overlay (make-overlay from to nil t nil)))
     (overlay-put overlay 'face (widget-apply widget :sample-face-get))
+    (overlay-put overlay 'evaporate t)
     (widget-put widget :sample-overlay overlay)))
 
 (defun widget-specify-doc (widget from to)
@@ -408,6 +410,7 @@ new value.")
   (let ((overlay (make-overlay from to nil t nil)))
     (overlay-put overlay 'widget-doc widget)
     (overlay-put overlay 'face widget-documentation-face)
+    (overlay-put overlay 'evaporate t)
     (widget-put widget :doc-overlay overlay)))
 
 (defmacro widget-specify-insert (&rest form)
diff --git a/man/ChangeLog b/man/ChangeLog
index f8fd73368f9..2514ea979b8 100644
--- a/man/ChangeLog
+++ b/man/ChangeLog
@@ -1,3 +1,8 @@
+2004-04-28  Masatake YAMATO  <jet@gyve.org>
+
+        * widget.texi (Programming Example): Remove
+        overlays.
+
 2004-04-27  Jesper Harder  <harder@ifa.au.dk>
 
         * faq.texi, viper.texi, dired-x.texi, autotype.texi: lisp -> Lisp.
diff --git a/man/widget.texi b/man/widget.texi
index c919a394efe..457af8a07bb 100644
--- a/man/widget.texi
+++ b/man/widget.texi
@@ -341,6 +341,7 @@ Interface}).
   (make-local-variable 'widget-example-repeat)
   (let ((inhibit-read-only t))
     (erase-buffer))
+  (remove-overlays)
   (widget-insert "Here is some documentation.\n\nName: ")
   (widget-create 'editable-field
                  :size 13