GtkText::set_point

set_point() sets the point in the string index where any extraneous text should be inserted. This means that the initial string has to exist in the first place.

If the text widget has focus at the time when this method is called, the insertion point will be reflected in the position of the cursor.

Note that an insertion point beyond the length of the existing string (that is, the entire existing GtkText content) cannot be set in this way.