Re: Multiple File Selection Widgetet?

[Sven Neumann <sven gimp org>]

Hi,

Roland Roberts <roland astrofoto org> writes:

> I've been playing with what I have to do to get a file selection
> widget to allow multiple files to be selected.  It's not pretty.  The
> basic problem is easy: change the file_list child widget to
> GTK_SELECTION_EXTENDED and add a couple of callbacks to keep track of
> select-row and unsetect-row events.  The ugly part is that the
> directory information is kept in internal structs which are only
> accessible to the class because they are declared inside gtkfilesel.c
> (of course, for my testing, that didn't keep me from copying them into
> my code...).
> 
> I'm thinking of hacking together a variant of GtkFileSelection (maybe
> GtkExtFileSelection) that will provide a a function to return a GList
> of the selected files.  Given that I've never messed with GTK until a
> couple of weeks ago, I'm wondering if anyone knows of a widget that
> will already allow multiple file selection or if there are plans to do
> this in GTK+ 2.0 (I didn't see anything in the API documentation to
> make me think so).

I don't think you need to extend the GtkFileSelection API. While I must
admit that it should be easier, it's certainly possible to get the list
of selected files through the current API. Here's how The Gimp does it:

list = clist_to_slist (GTK_CLIST (GTK_FILE_SELECTION (fs)->file_list));


static GSList *
clist_to_slist (GtkCList *file_list)
{
  GSList *list = NULL;
  GList  *row;
  gint    rownum;
  gchar  *temp;
  
  for (row = file_list->row_list, rownum = 0;
       row; 
       row = g_list_next (row), rownum++)
    {
      if (GTK_CLIST_ROW (row)->state == GTK_STATE_SELECTED)
        {
          if (gtk_clist_get_cell_type (file_list, rownum, 0) == GTK_CELL_TEXT)
            {
              gtk_clist_get_text (file_list, rownum, 0, &temp);
              list = g_slist_prepend (list, g_strdup (temp));
            }
        }
    }

  return list;
}