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
          consecutive 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).