add _gtk_tree_view_column_autosize

add _gtk_tree_view_column_autosize

Fri Apr 19 23:38:16 2002  Kristian Rietveld  <kris@gtk.org>

        * gtk/gtktreeprivate.h: add _gtk_tree_view_column_autosize

        * gtk/gtktreeview.c: privately export _gtk_tree_view_column_autosize,
        and add a small note about that function,
        (gtk_tree_view_button_press): check for double click and
        "not having an autosize" column before autosizing the column,

        * gtk/gtktreeviewcolumn.c (gtk_tree_view_column_set_min_width):
        call _gtk_tree_view_column_autosize to update autosized column width
        (gtk_tree_view_column_set_max_width): ditto