GtkTreeView comments

[Brian Cameron <Brian Cameron Sun COM>]

Gtk Experts:

I am now working on the ATK interfaces for the GtkTreeView widget when
it is displaying as a GtkListStore.

The interface that I am workin on returns the cell value given the
row/column table coordinates (of the GtkTreeView, not the coordinates
of the GtkTreeModel).

I found that there is no easy way to get the GtkTreeModel column number
given the GtkTreeView column number.  I found that I had to get the
GtkTreeViewColumn structure and dig through its "attributes" to get
this information.  It seemed like there should be an access function for
returning this information.  Or am I wrong here?

I also notice that there isn't a GtkTreeView function that returns
the number of columns in the view.  In order to calculate this I have
to call gtk_tree_view_get_columns() and loop through the whole linked
list to count the number of rows.  Wouldn't it be nice if the
tree_view->priv->n_columns value were somehow accessible.

Anyway, this is the code I had to write in order to get the value for
a call given the x,y coordinates of the TreeView.  I'd appreciate it
if anyone could let me know if there is a more efficient way of doing
this.

  {
    GtkTreePath *tree_path;
    GtkTreeIter iter;
    GtkTreeViewColumn *tv_col;
    GValue *value, val;
    value = &val;

    tree_path = gtk_tree_path_new();
    gtk_tree_path_append_index(tree_path, row);
    gtk_tree_model_get_iter(model, &iter, tree_path);
    tv_col = gtk_tree_view_get_column(view, column);

    if (tv_col != NULL)
    {
      GSList *list;
      list = tv_col->attributes;

      while (list && list->next)
      {
        memset (value, 0, sizeof (value));

	gtk_tree_model_get_value(model, &iter,
	  GPOINTER_TO_INT(list->next->data), value);

        /* now i have the value and can process it */

	list = list->next->next;
      }
    }
  }