DtEditorUndoEdit(library call) DtEditorUndoEdit(library call)
NAMEDtEditorUndoEdit — undo the last edit made to the text in a DtEditor
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 dele‐
tions followed by up to one set of consecutive insertions. An inser‐
tion 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). Undo‐
ing 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).
Upon successful completion, the DtEditorUndoEdit function returns True;
otherwise, if there is no pending undo it returns False.
Dt/Editor.h - DtEditor(5), DtEditor(3).