DtEditorUndoEdit(3)

DtEditorUndoEdit(3)    C LIBRARY FUNCTIONS    DtEditorUndoEdit(3)

NAME
     DtEditorUndoEdit -	undo the last edit made	to the text in	a
     DtEditor widget

SYNOPSIS
     #include <Dt/Editor.h>

     Boolean DtEditorUndoEdit(Widget widget);

DESCRIPTION
     The  DtEditorUndoEdit()  function	undoes	the  last  change
     (deletion	or  insertion)	made  to  the  text in a DtEditor
     widget.  A	change consists	of either a  set  of  consecutive
     insertions, or a set of consecutive deletions followed by up
     to	one set	of consecutive insertions.  An insertion is  con-
     secutive if there have been no intervening	deletions, and it
     is	continuing forward from	the same point.	  A  deletion  is
     consecutive  if  there  have been no intervening insertions,
     and its start or end position is coincidental with	the  last
     deletion  (that is, the deletion is continuing from the same
     point, either forward or backward).  Undoing  an  edit  once
     restores  the original text.  Undoing an edit twice restores
     the last change.

     The widget	argument specifies the DtEditor	widget ID.

     For a complete definition of the  DtEditor	 widget	 and  its
     associated	resources, see DtEditor(3).

RETURN VALUE
     Upon successful completion, the DtEditorUndoEdit()	 function
     returns  True;  otherwise,	 if  there  is no pending undo it
     returns False.

SEE ALSO
     DtEditor(5), DtEditor(3).

Unix System LaboratoLast change: 1 August 1995			1