the GtkTextWidget whose contents are to be accessed
contents
a character vector (of length 1) giving the
contents to be either appended or inserted into the text widget.
append
a logical value indicating whether the
new text is to be appended to the existing contents or
used to replace it. If this is FALSE, the text widget
is currently cleared first.
start
locations in the text widget where the
to start clearing the text. These are essentially character offsets
into the string at present.
end
locations in the text widget where the
to complete clearing the text. These are essentially character offsets
into the string at present.