Row Background Color GtkTreeView Widget

I'm attempting to color disabled rows in a gtk tree view widget a light gray color. From what I've read, I'm supposed to set the background-gdk property of the corresponding cellrenderer and bind it to a model column. This sort of works.

Gtk::CellRendererText* textRenderer = manage(new Gtk::CellRendererText());
textRenderer->property_editable() = false;
Gtk::TreeViewColumn *col = manage(new Gtk::TreeViewColumn("Column1", *textRenderer));
col->add_attribute(*textRenderer, "background-gdk", m_treeview_columns.m_back_color);
my_treeview.append_column(*col);

Gtk::TreeModel::Row row;
for (int i = 0; i < NUMBER_OF_ROWS; iLane++){
   row = *(treeview_liststore->append());
   row[m_workListColumns.m_back_color] = Gdk::Color("#CCCCCC");
}

In the end though, I get only the cells colored properly. BUT I also get an ugly white-spa开发者_C百科ce in between the cells. Does anyone know of a way to fix this or a better way to achieve the effect I'm after?

Could you set the background of the row to match the cell background or set the bakground of the tree view all together ? Or maybe the cell with cell-background-gdk ?