- /* use checkbox for the visible column */
-
- active_cell = dynamic_cast<CellRendererToggle*>(group_display.get_column_cell_renderer (2));
- active_cell->property_activatable() = true;
- active_cell->property_radio() = false;
-
- group_model->signal_row_changed().connect (mem_fun (*this, &Mixer_UI::mix_group_row_change));