+ CANVAS_DEBUG_NAME (videotl_group, "videotl group");
+ marker_group = new ArdourCanvas::Group (_time_markers_group, ArdourCanvas::Duple (0.0, timebar_height + 1.0));
+ CANVAS_DEBUG_NAME (marker_group, "marker group");
+ transport_marker_group = new ArdourCanvas::Group (_time_markers_group, ArdourCanvas::Duple (0.0, (timebar_height * 2.0) + 1.0));
+ CANVAS_DEBUG_NAME (transport_marker_group, "transport marker group");
+ range_marker_group = new ArdourCanvas::Group (_time_markers_group, ArdourCanvas::Duple (0.0, (timebar_height * 3.0) + 1.0));
+ CANVAS_DEBUG_NAME (range_marker_group, "range marker group");
+ tempo_group = new ArdourCanvas::Group (_time_markers_group, ArdourCanvas::Duple (0.0, (timebar_height * 4.0) + 1.0));
+ CANVAS_DEBUG_NAME (tempo_group, "tempo group");
+ meter_group = new ArdourCanvas::Group (_time_markers_group, ArdourCanvas::Duple (0.0, (timebar_height * 5.0) + 1.0));
+ CANVAS_DEBUG_NAME (meter_group, "meter group");