Re: list of goocanvas items

[Damon Chaplin <damon karuna eclipse co uk>]

On Tue, 2012-07-17 at 11:27 +0200, control H wrote:
> Dear list,
> 
> I try to find all items belonging to a canvas. The function which
> comes close to what I'm looking for is goo_canvas_get_items_in_area()
> however, it doesn't allow me to find _all_ items, regardless whether
> they're inside or outside some area. I could use an "infinite" big
> area to capture all items but I don't like to put in some magic
> numbers. Is there another way to find all items?

I think you'll have to write your own function to traverse the tree,
something like this (this is untested and probably buggy!):

GList*
visit_item (GooCanvasItem *item, GList *item_list)
{
      int n_children, i;

      // Add the item to the list here if desired.
      item_list = g_list_prepend (item_list, item);

      n_children = goo_canvas_item_get_n_children (item);
      for (i = 0; i < n_children; i++)
	{
	  GooCanvasItem *child = goo_canvas_item_get_child (item, i);
          item_list = visit_item (child, item_list);
        }

     return item_list;
}

then call it like this:
  GList *item_list = visit_item (root_item, NULL);

Damon