Setting tree view column attributes from its signal handler

["Ian Puleston" <ian underpressuredivers com>]

Hi,

Any ideas on this? I have a tree view that pops-up a menu when the user
double-clicks in a cell. The menu has options both for the selected row and
the selected column, but on this event the tree view highlights the selected
row, so I wanted to try to highlight the selected column too. The following
is what I tried to do in the tree view's "row-activated" signal handler:

void treeViewClickHandler(GtkTreeView *treeView, GtkTreePath *rowPath,
                          GtkTreeViewColumn *column, gpointer data)
{
    GtkWidget       *colsMenu = data;
    GtkCellRenderer *renderer;
    GList           *cellList;
    int             i;

    g_assert(GTK_IS_MENU(colsMenu));

    cellList = gtk_tree_view_column_get_cell_renderers(column);
    for (i = 0; (renderer = g_list_nth_data(cellList, i)) != NULL; i++)
    {
        g_object_set(G_OBJECT(renderer), "background", "blue", NULL);
    }
    g_list_free(cellList);

    gtk_menu_popup(GTK_MENU(colsMenu), NULL, NULL, NULL, NULL,
                   0, gtk_get_current_event_time());
}

This nearly worked, but the background color doesn't get rendered. It
actually appears in the cells of the column as I subsequently move the mouse
over them. So I tried adding this after the g_object_set to try to get the
column's cells to render:

        gtk_cell_renderer_get_size(renderer, GTK_WIDGET(column), &cellArea,
                                   &xOff, &yOff, &width, &height);
        gtk_cell_renderer_render(renderer, GTK_WIDGET(column)->window,
                                 GTK_WIDGET(column),
                                 &cellArea, &cellArea, &cellArea,
                                 GTK_CELL_RENDERER_SELECTED);

But that did nothing. I also tried removing the menu popup line and it still
behaves the same, so it's not caused by displaying the menu. But I call
similar code to change attributes of a column  later in the signal handler
for the menu, and that works fine.

Can anyone see anything that I'm doing wrong here?

Ian