Merge branch 'master' into cairocanvas
[ardour.git] / gtk2_ardour / editor_rulers.cc
index 3f1fc6a49743735ebfd4786ebe9187612c6853aa..0a855d7f90efa50e4910ff5b863ad5f19a2683a6 100644 (file)
@@ -1,5 +1,5 @@
 /*
-    Copyright (C) 2000 Paul Davis 
+    Copyright (C) 2000 Paul Davis
 
     This program is free software; you can redistribute it and/or modify
     it under the terms of the GNU General Public License as published by
 
 */
 
-#include <cstdio> // for sprintf, grrr 
+#ifdef WAF_BUILD
+#include "gtk2ardour-config.h"
+#endif
+
+#include <cstdio> // for sprintf, grrr
 #include <cmath>
+#include <inttypes.h>
 
 #include <string>
 
 #include <gtk/gtkaction.h>
 
+#include "canvas/group.h"
+
+#include "ardour/session.h"
 #include "ardour/tempo.h"
 #include "ardour/profile.h"
-#include <gtkmm2ext/gtk_ui.h>
+
+#include "gtkmm2ext/gtk_ui.h"
 
 #include "editor.h"
 #include "editing.h"
 #include "gui_thread.h"
 #include "time_axis_view.h"
 #include "editor_drag.h"
+#include "editor_cursors.h"
 
 #include "i18n.h"
 
-using namespace sigc;
 using namespace ARDOUR;
 using namespace PBD;
 using namespace Gtk;
@@ -49,9 +58,9 @@ Editor *Editor::ruler_editor;
 /* the order here must match the "metric" enums in editor.h */
 
 GtkCustomMetric Editor::ruler_metrics[4] = {
-       {1, Editor::_metric_get_smpte },
+       {1, Editor::_metric_get_timecode },
        {1, Editor::_metric_get_bbt },
-       {1, Editor::_metric_get_frames },
+       {1, Editor::_metric_get_samples },
        {1, Editor::_metric_get_minsec }
 };
 
@@ -74,14 +83,14 @@ Editor::initialize_rulers ()
        minsec_ruler->hide ();
        minsec_ruler->set_no_show_all();
 
-       _smpte_ruler = gtk_custom_hruler_new ();
-       smpte_ruler = Glib::wrap (_smpte_ruler);
-       smpte_ruler->set_name ("SMPTERuler");
-       smpte_ruler->set_size_request (-1, (int)timebar_height);
-       gtk_custom_ruler_set_metric (GTK_CUSTOM_RULER(_smpte_ruler), &ruler_metrics[ruler_metric_smpte]);
-       smpte_ruler->hide ();
-       smpte_ruler->set_no_show_all();
-       smpte_nmarks = 0;
+       _timecode_ruler = gtk_custom_hruler_new ();
+       timecode_ruler = Glib::wrap (_timecode_ruler);
+       timecode_ruler->set_name ("TimecodeRuler");
+       timecode_ruler->set_size_request (-1, (int)timebar_height);
+       gtk_custom_ruler_set_metric (GTK_CUSTOM_RULER(_timecode_ruler), &ruler_metrics[ruler_metric_timecode]);
+       timecode_ruler->hide ();
+       timecode_ruler->set_no_show_all();
+       timecode_nmarks = 0;
 
        _bbt_ruler = gtk_custom_hruler_new ();
        bbt_ruler = Glib::wrap (_bbt_ruler);
@@ -92,13 +101,13 @@ Editor::initialize_rulers ()
        bbt_ruler->set_no_show_all();
        bbt_nmarks = 0;
 
-       _frames_ruler = gtk_custom_hruler_new ();
-       frames_ruler = Glib::wrap (_frames_ruler);
-       frames_ruler->set_name ("FramesRuler");
-       frames_ruler->set_size_request (-1, (int)timebar_height);
-       gtk_custom_ruler_set_metric (GTK_CUSTOM_RULER(_frames_ruler), &ruler_metrics[ruler_metric_frames]);
-       frames_ruler->hide ();
-       frames_ruler->set_no_show_all();
+       _samples_ruler = gtk_custom_hruler_new ();
+       samples_ruler = Glib::wrap (_samples_ruler);
+       samples_ruler->set_name ("SamplesRuler");
+       samples_ruler->set_size_request (-1, (int) timebar_height);
+       gtk_custom_ruler_set_metric (GTK_CUSTOM_RULER (_samples_ruler), &ruler_metrics[ruler_metric_samples]);
+       samples_ruler->hide ();
+       samples_ruler->set_no_show_all ();
 
        _bbt_ruler = gtk_custom_hruler_new ();
        bbt_ruler = Glib::wrap (_bbt_ruler);
@@ -114,7 +123,7 @@ Editor::initialize_rulers ()
        using namespace Box_Helpers;
        BoxList & ruler_lab_children =  ruler_label_vbox.children();
        BoxList & ruler_children =  time_canvas_vbox.children();
-       BoxList & lab_children =  time_button_vbox.children();
+       BoxList & lab_children =  time_bars_vbox.children();
 
        BoxList::iterator canvaspos = ruler_children.begin();
 
@@ -124,60 +133,60 @@ Editor::initialize_rulers ()
        lab_children.push_back (Element(transport_mark_label, PACK_SHRINK, PACK_START));
        lab_children.push_back (Element(cd_mark_label, PACK_SHRINK, PACK_START));
        lab_children.push_back (Element(mark_label, PACK_SHRINK, PACK_START));
+       lab_children.push_back (Element(videotl_label, PACK_SHRINK, PACK_START));
 
        ruler_lab_children.push_back (Element(minsec_label, PACK_SHRINK, PACK_START));
        ruler_children.insert (canvaspos, Element(*minsec_ruler, PACK_SHRINK, PACK_START));
-       ruler_lab_children.push_back (Element(smpte_label, PACK_SHRINK, PACK_START));
-       ruler_children.insert (canvaspos, Element(*smpte_ruler, PACK_SHRINK, PACK_START));
-       ruler_lab_children.push_back (Element(frame_label, PACK_SHRINK, PACK_START));
-       ruler_children.insert (canvaspos, Element(*frames_ruler, PACK_SHRINK, PACK_START));
+       ruler_lab_children.push_back (Element(timecode_label, PACK_SHRINK, PACK_START));
+       ruler_children.insert (canvaspos, Element(*timecode_ruler, PACK_SHRINK, PACK_START));
+       ruler_lab_children.push_back (Element(samples_label, PACK_SHRINK, PACK_START));
+       ruler_children.insert (canvaspos, Element (*samples_ruler, PACK_SHRINK, PACK_START));
        ruler_lab_children.push_back (Element(bbt_label, PACK_SHRINK, PACK_START));
        ruler_children.insert (canvaspos, Element(*bbt_ruler, PACK_SHRINK, PACK_START));
 
-       smpte_ruler->add_events (Gdk::BUTTON_PRESS_MASK|Gdk::BUTTON_RELEASE_MASK|Gdk::SCROLL_MASK);
+       timecode_ruler->add_events (Gdk::BUTTON_PRESS_MASK|Gdk::BUTTON_RELEASE_MASK|Gdk::SCROLL_MASK);
        bbt_ruler->add_events (Gdk::BUTTON_PRESS_MASK|Gdk::BUTTON_RELEASE_MASK|Gdk::SCROLL_MASK);
-       frames_ruler->add_events (Gdk::BUTTON_PRESS_MASK|Gdk::BUTTON_RELEASE_MASK|Gdk::SCROLL_MASK);
+       samples_ruler->add_events (Gdk::BUTTON_PRESS_MASK|Gdk::BUTTON_RELEASE_MASK|Gdk::SCROLL_MASK);
        minsec_ruler->add_events (Gdk::BUTTON_PRESS_MASK|Gdk::BUTTON_RELEASE_MASK|Gdk::SCROLL_MASK);
 
-       smpte_ruler->signal_button_release_event().connect (mem_fun(*this, &Editor::ruler_button_release));
-       bbt_ruler->signal_button_release_event().connect (mem_fun(*this, &Editor::ruler_button_release));
-       frames_ruler->signal_button_release_event().connect (mem_fun(*this, &Editor::ruler_button_release));
-       minsec_ruler->signal_button_release_event().connect (mem_fun(*this, &Editor::ruler_button_release));
-
-       smpte_ruler->signal_button_press_event().connect (mem_fun(*this, &Editor::ruler_button_press));
-       bbt_ruler->signal_button_press_event().connect (mem_fun(*this, &Editor::ruler_button_press));
-       frames_ruler->signal_button_press_event().connect (mem_fun(*this, &Editor::ruler_button_press));
-       minsec_ruler->signal_button_press_event().connect (mem_fun(*this, &Editor::ruler_button_press));
-       
-       smpte_ruler->signal_motion_notify_event().connect (mem_fun(*this, &Editor::ruler_mouse_motion));
-       bbt_ruler->signal_motion_notify_event().connect (mem_fun(*this, &Editor::ruler_mouse_motion));
-       frames_ruler->signal_motion_notify_event().connect (mem_fun(*this, &Editor::ruler_mouse_motion));
-       minsec_ruler->signal_motion_notify_event().connect (mem_fun(*this, &Editor::ruler_mouse_motion));
-
-       smpte_ruler->signal_scroll_event().connect (mem_fun(*this, &Editor::ruler_scroll));
-       bbt_ruler->signal_scroll_event().connect (mem_fun(*this, &Editor::ruler_scroll));
-       frames_ruler->signal_scroll_event().connect (mem_fun(*this, &Editor::ruler_scroll));
-       minsec_ruler->signal_scroll_event().connect (mem_fun(*this, &Editor::ruler_scroll));
+       timecode_ruler->signal_button_release_event().connect (sigc::mem_fun(*this, &Editor::ruler_button_release));
+       bbt_ruler->signal_button_release_event().connect (sigc::mem_fun(*this, &Editor::ruler_button_release));
+       samples_ruler->signal_button_release_event().connect (sigc::mem_fun(*this, &Editor::ruler_button_release));
+       minsec_ruler->signal_button_release_event().connect (sigc::mem_fun(*this, &Editor::ruler_button_release));
+
+       timecode_ruler->signal_button_press_event().connect (sigc::mem_fun(*this, &Editor::ruler_button_press));
+       bbt_ruler->signal_button_press_event().connect (sigc::mem_fun(*this, &Editor::ruler_button_press));
+       samples_ruler->signal_button_press_event().connect (sigc::mem_fun(*this, &Editor::ruler_button_press));
+       minsec_ruler->signal_button_press_event().connect (sigc::mem_fun(*this, &Editor::ruler_button_press));
+
+       timecode_ruler->signal_motion_notify_event().connect (sigc::mem_fun(*this, &Editor::ruler_mouse_motion));
+       bbt_ruler->signal_motion_notify_event().connect (sigc::mem_fun(*this, &Editor::ruler_mouse_motion));
+       samples_ruler->signal_motion_notify_event().connect (sigc::mem_fun(*this, &Editor::ruler_mouse_motion));
+       minsec_ruler->signal_motion_notify_event().connect (sigc::mem_fun(*this, &Editor::ruler_mouse_motion));
+
+       timecode_ruler->signal_scroll_event().connect (sigc::mem_fun(*this, &Editor::ruler_scroll));
+       bbt_ruler->signal_scroll_event().connect (sigc::mem_fun(*this, &Editor::ruler_scroll));
+       samples_ruler->signal_scroll_event().connect (sigc::mem_fun(*this, &Editor::ruler_scroll));
+       minsec_ruler->signal_scroll_event().connect (sigc::mem_fun(*this, &Editor::ruler_scroll));
 
        visible_timebars = 0; /*this will be changed below */
-       canvas_timebars_vsize = 0;
 }
 
 bool
 Editor::ruler_scroll (GdkEventScroll* event)
 {
-       nframes64_t xdelta;
+       framepos_t xdelta;
        int direction = event->direction;
        bool handled = false;
 
        switch (direction) {
        case GDK_SCROLL_UP:
-               temporal_zoom_step (true);
+               temporal_zoom_step (false);
                handled = true;
                break;
 
        case GDK_SCROLL_DOWN:
-               temporal_zoom_step (false);
+               temporal_zoom_step (true);
                handled = true;
                break;
 
@@ -193,10 +202,10 @@ Editor::ruler_scroll (GdkEventScroll* event)
 
        case GDK_SCROLL_RIGHT:
                xdelta = (current_page_frames() / 2);
-               if (max_frames - xdelta > leftmost_frame) {
+               if (max_framepos - xdelta > leftmost_frame) {
                        reset_x_origin (leftmost_frame + xdelta);
                } else {
-                       reset_x_origin (max_frames - current_page_frames());
+                       reset_x_origin (max_framepos - current_page_frames());
                }
                handled = true;
                break;
@@ -210,23 +219,21 @@ Editor::ruler_scroll (GdkEventScroll* event)
 }
 
 
-gint
+bool
 Editor::ruler_button_press (GdkEventButton* ev)
 {
-       if (session == 0) {
-               return FALSE;
+       if (_session == 0) {
+               return false;
        }
 
-       // jlc: grab ev->window ?
-       //Gtk::Main::grab_add (*minsec_ruler);
        Widget * grab_widget = 0;
 
-       if (smpte_ruler->is_realized() && ev->window == smpte_ruler->get_window()->gobj()) {
-               grab_widget = smpte_ruler;
+       if (timecode_ruler->is_realized() && ev->window == timecode_ruler->get_window()->gobj()) {
+               grab_widget = timecode_ruler;
        } else if (bbt_ruler->is_realized() && ev->window == bbt_ruler->get_window()->gobj()) {
                grab_widget = bbt_ruler;
-       } else if (frames_ruler->is_realized() && ev->window == frames_ruler->get_window()->gobj()) {
-               grab_widget = frames_ruler;
+       } else if (samples_ruler->is_realized() && ev->window == samples_ruler->get_window()->gobj()) {
+               grab_widget = samples_ruler;
        } else if (minsec_ruler->is_realized() && ev->window == minsec_ruler->get_window()->gobj()) {
                grab_widget = minsec_ruler;
        }
@@ -239,34 +246,30 @@ Editor::ruler_button_press (GdkEventButton* ev)
        if (ev->button == 1) {
                // Since we will locate the playhead on button release, cancel any running
                // auditions.
-               if (session->is_auditioning()) {
-                       session->cancel_audition ();
+               if (_session->is_auditioning()) {
+                       _session->cancel_audition ();
                }
-               
+
                /* playhead cursor */
-               assert (_drag == 0);
-               _drag = new CursorDrag (this, &playhead_cursor->canvas_item, false);
-               _drag->start_grab (reinterpret_cast<GdkEvent *> (ev));
+               _drags->set (new CursorDrag (this, &playhead_cursor->track_canvas_item (), false), reinterpret_cast<GdkEvent *> (ev));
                _dragging_playhead = true;
        }
 
-       return TRUE;
+       return true;
 }
 
-gint
+bool
 Editor::ruler_button_release (GdkEventButton* ev)
 {
-       if (session == 0) {
-               return FALSE;
+       if (_session == 0) {
+               return false;
        }
-       
+
        gint x,y;
        Gdk::ModifierType state;
 
-       if (_drag) {
-               _drag->end_grab (reinterpret_cast<GdkEvent*> (ev));
-               delete _drag;
-               _drag = 0;
+       if (_drags->active ()) {
+               _drags->end_grab (reinterpret_cast<GdkEvent*> (ev));
                _dragging_playhead = false;
        }
 
@@ -275,8 +278,8 @@ Editor::ruler_button_release (GdkEventButton* ev)
                time_canvas_event_box.get_window()->get_pointer (x, y, state);
 
                stop_canvas_autoscroll();
-       
-               nframes64_t where = leftmost_frame + pixel_to_frame (x);
+
+               framepos_t where = leftmost_frame + pixel_to_frame (x);
                snap_to (where);
                popup_ruler_menu (where);
        }
@@ -286,40 +289,40 @@ Editor::ruler_button_release (GdkEventButton* ev)
                ruler_grabbed_widget = 0;
        }
 
-       return TRUE;
+       return true;
 }
 
-gint
+bool
 Editor::ruler_label_button_release (GdkEventButton* ev)
 {
        if (ev->button == 3) {
-               Gtk::Menu* m= dynamic_cast<Gtk::Menu*> (ActionManager::get_widget (X_("/RulerMenuPopup")));
+               Gtk::Menu* m = dynamic_cast<Gtk::Menu*> (ActionManager::get_widget (X_("/RulerMenuPopup")));
                if (m) {
                        m->popup (1, ev->time);
                }
        }
-       
-       return TRUE;
+
+       return true;
 }
 
 
-gint
+bool
 Editor::ruler_mouse_motion (GdkEventMotion* ev)
 {
-       if (session == 0) {
-               return FALSE;
+       if (_session == 0) {
+               return false;
        }
 
-       if (_drag) {
-               _drag->motion_handler (reinterpret_cast<GdkEvent*> (ev), false);
+       if (_drags->active ()) {
+               _drags->motion_handler (reinterpret_cast<GdkEvent*> (ev), false);
        }
 
-       return TRUE;
+       return true;
 }
 
 
 void
-Editor::popup_ruler_menu (nframes64_t where, ItemType t)
+Editor::popup_ruler_menu (framepos_t where, ItemType t)
 {
        using namespace Menu_Helpers;
 
@@ -335,37 +338,59 @@ Editor::popup_ruler_menu (nframes64_t where, ItemType t)
 
        switch (t) {
        case MarkerBarItem:
-               ruler_items.push_back (MenuElem (_("New location marker"), bind ( mem_fun(*this, &Editor::mouse_add_new_marker), where, false, false)));
-               ruler_items.push_back (MenuElem (_("Clear all locations"), mem_fun(*this, &Editor::clear_markers)));
-               ruler_items.push_back (MenuElem (_("Unhide locations"), mem_fun(*this, &Editor::unhide_markers)));
+               ruler_items.push_back (MenuElem (_("New location marker"), sigc::bind ( sigc::mem_fun(*this, &Editor::mouse_add_new_marker), where, false, false)));
+               ruler_items.push_back (MenuElem (_("Clear all locations"), sigc::mem_fun(*this, &Editor::clear_markers)));
+               ruler_items.push_back (MenuElem (_("Unhide locations"), sigc::mem_fun(*this, &Editor::unhide_markers)));
                ruler_items.push_back (SeparatorElem ());
                break;
        case RangeMarkerBarItem:
-               //ruler_items.push_back (MenuElem (_("New Range")));
-               ruler_items.push_back (MenuElem (_("Clear all ranges"), mem_fun(*this, &Editor::clear_ranges)));
-               ruler_items.push_back (MenuElem (_("Unhide ranges"), mem_fun(*this, &Editor::unhide_ranges)));
+               ruler_items.push_back (MenuElem (_("New range"), sigc::bind (sigc::mem_fun (*this, &Editor::mouse_add_new_range), where)));
+               ruler_items.push_back (MenuElem (_("Clear all ranges"), sigc::mem_fun(*this, &Editor::clear_ranges)));
+               ruler_items.push_back (MenuElem (_("Unhide ranges"), sigc::mem_fun(*this, &Editor::unhide_ranges)));
                ruler_items.push_back (SeparatorElem ());
 
                break;
        case TransportMarkerBarItem:
 
                break;
-       
+
        case CdMarkerBarItem:
                // TODO
-               ruler_items.push_back (MenuElem (_("New CD track marker"), bind ( mem_fun(*this, &Editor::mouse_add_new_marker), where, true, false)));
+               ruler_items.push_back (MenuElem (_("New CD track marker"), sigc::bind ( sigc::mem_fun(*this, &Editor::mouse_add_new_marker), where, true, false)));
                break;
-               
-       
+
+
        case TempoBarItem:
-               ruler_items.push_back (MenuElem (_("New Tempo"), bind ( mem_fun(*this, &Editor::mouse_add_new_tempo_event), where)));
-               ruler_items.push_back (MenuElem (_("Clear tempo")));
+               ruler_items.push_back (MenuElem (_("New Tempo"), sigc::bind ( sigc::mem_fun(*this, &Editor::mouse_add_new_tempo_event), where)));
                ruler_items.push_back (SeparatorElem ());
                break;
 
        case MeterBarItem:
-               ruler_items.push_back (MenuElem (_("New Meter"), bind ( mem_fun(*this, &Editor::mouse_add_new_meter_event), where)));
-               ruler_items.push_back (MenuElem (_("Clear meter")));
+               ruler_items.push_back (MenuElem (_("New Meter"), sigc::bind ( sigc::mem_fun(*this, &Editor::mouse_add_new_meter_event), where)));
+               ruler_items.push_back (SeparatorElem ());
+               break;
+
+       case VideoBarItem:
+               ruler_items.push_back (MenuElem (_("Timeline height")));
+               static_cast<MenuItem*>(&ruler_items.back())->set_sensitive(false);
+               ruler_items.push_back (CheckMenuElem (_("Large"),  sigc::bind ( sigc::mem_fun(*this, &Editor::set_video_timeline_height), 6)));
+               if (videotl_bar_height == 6) { static_cast<CheckMenuItem*>(&ruler_items.back())->set_active(true);}
+               ruler_items.push_back (CheckMenuElem (_("Normal"), sigc::bind ( sigc::mem_fun(*this, &Editor::set_video_timeline_height), 4)));
+               if (videotl_bar_height == 4) { static_cast<CheckMenuItem*>(&ruler_items.back())->set_active(true);}
+               ruler_items.push_back (CheckMenuElem (_("Small"),  sigc::bind ( sigc::mem_fun(*this, &Editor::set_video_timeline_height), 3)));
+               if (videotl_bar_height == 3) { static_cast<CheckMenuItem*>(&ruler_items.back())->set_active(true);}
+               ruler_items.push_back (SeparatorElem ());
+
+               ruler_items.push_back (MenuElem (_("Align Video Track")));
+               static_cast<MenuItem*>(&ruler_items.back())->set_sensitive(false);
+
+               ruler_items.push_back (CheckMenuElem (_("Lock")));
+               {
+               CheckMenuItem* vtl_lock = static_cast<CheckMenuItem*>(&ruler_items.back());
+               vtl_lock->set_active(is_video_timeline_locked());
+               vtl_lock->signal_activate().connect (sigc::mem_fun(*this, &Editor::toggle_video_timeline_locked));
+               }
+
                ruler_items.push_back (SeparatorElem ());
                break;
 
@@ -419,6 +444,10 @@ Editor::popup_ruler_menu (nframes64_t where, ItemType t)
        if (action) {
                ruler_items.push_back (MenuElem (*action->create_menu_item()));
        }
+       action = ActionManager::get_action ("Rulers", "toggle-video-ruler");
+       if (action) {
+               ruler_items.push_back (MenuElem (*action->create_menu_item()));
+       }
 
        editor_ruler_menu->popup (1, gtk_get_current_event_time());
 
@@ -430,9 +459,9 @@ Editor::store_ruler_visibility ()
 {
        XMLNode* node = new XMLNode(X_("RulerVisibility"));
 
-       node->add_property (X_("smpte"), ruler_timecode_action->get_active() ? "yes": "no");
+       node->add_property (X_("timecode"), ruler_timecode_action->get_active() ? "yes": "no");
        node->add_property (X_("bbt"), ruler_bbt_action->get_active() ? "yes": "no");
-       node->add_property (X_("frames"), ruler_samples_action->get_active() ? "yes": "no");
+       node->add_property (X_("samples"), ruler_samples_action->get_active() ? "yes": "no");
        node->add_property (X_("minsec"), ruler_minsec_action->get_active() ? "yes": "no");
        node->add_property (X_("tempo"), ruler_tempo_action->get_active() ? "yes": "no");
        node->add_property (X_("meter"), ruler_meter_action->get_active() ? "yes": "no");
@@ -440,21 +469,22 @@ Editor::store_ruler_visibility ()
        node->add_property (X_("rangemarker"), ruler_range_action->get_active() ? "yes": "no");
        node->add_property (X_("transportmarker"), ruler_loop_punch_action->get_active() ? "yes": "no");
        node->add_property (X_("cdmarker"), ruler_cd_marker_action->get_active() ? "yes": "no");
+       node->add_property (X_("videotl"), ruler_video_action->get_active() ? "yes": "no");
 
-       session->add_extra_xml (*node);
-       session->set_dirty ();
+       _session->add_extra_xml (*node);
+       _session->set_dirty ();
 }
 
-void 
+void
 Editor::restore_ruler_visibility ()
 {
        XMLProperty* prop;
-       XMLNode * node = session->extra_xml (X_("RulerVisibility"));
+       XMLNode * node = _session->extra_xml (X_("RulerVisibility"));
 
        no_ruler_shown_update = true;
 
        if (node) {
-               if ((prop = node->property ("smpte")) != 0) {
+               if ((prop = node->property ("timecode")) != 0) {
                        if (string_is_affirmative (prop->value())) {
                                ruler_timecode_action->set_active (true);
                        } else {
@@ -468,7 +498,7 @@ Editor::restore_ruler_visibility ()
                                ruler_bbt_action->set_active (false);
                        }
                }
-               if ((prop = node->property ("frames")) != 0) {
+               if ((prop = node->property ("samples")) != 0) {
                        if (string_is_affirmative (prop->value())) {
                                ruler_samples_action->set_active (true);
                        } else {
@@ -527,11 +557,11 @@ Editor::restore_ruler_visibility ()
                        }
 
                } else {
-                       // this session doesn't yet know about the cdmarker ruler
-                       // as a benefit to the user who doesn't know the feature exists, show the ruler if 
+                       // this _session doesn't yet know about the cdmarker ruler
+                       // as a benefit to the user who doesn't know the feature exists, show the ruler if
                        // any cd marks exist
                        ruler_cd_marker_action->set_active (false);
-                       const Locations::LocationList & locs = session->locations()->list();
+                       const Locations::LocationList & locs = _session->locations()->list();
                        for (Locations::LocationList::const_iterator i = locs.begin(); i != locs.end(); ++i) {
                                if ((*i)->is_cd_marker()) {
                                        ruler_cd_marker_action->set_active (true);
@@ -540,6 +570,14 @@ Editor::restore_ruler_visibility ()
                        }
                }
 
+               if ((prop = node->property ("videotl")) != 0) {
+                       if (string_is_affirmative (prop->value())) {
+                               ruler_video_action->set_active (true);
+                       } else {
+                               ruler_video_action->set_active (false);
+                       }
+               }
+
        }
 
        no_ruler_shown_update = false;
@@ -568,20 +606,20 @@ Editor::update_ruler_visibility ()
 
        if (ruler_timecode_action->get_active()) {
                visible_rulers++;
-               smpte_label.show ();
-               smpte_ruler->show ();
+               timecode_label.show ();
+               timecode_ruler->show ();
        } else {
-               smpte_label.hide ();
-               smpte_ruler->hide ();
+               timecode_label.hide ();
+               timecode_ruler->hide ();
        }
 
        if (ruler_samples_action->get_active()) {
                visible_rulers++;
-               frame_label.show ();
-               frames_ruler->show ();
+               samples_label.show ();
+               samples_ruler->show ();
        } else {
-               frame_label.hide ();
-               frames_ruler->hide ();
+               samples_label.hide ();
+               samples_ruler->hide ();
        }
 
        if (ruler_bbt_action->get_active()) {
@@ -605,16 +643,17 @@ Editor::update_ruler_visibility ()
        transport_mark_label.hide();
        cd_mark_label.hide();
        mark_label.hide();
+       videotl_label.hide();
 #endif
        if (ruler_meter_action->get_active()) {
-               old_unit_pos = meter_group->property_y();
+               old_unit_pos = meter_group->position().y;
                if (tbpos != old_unit_pos) {
-                       meter_group->move ( 0.0, tbpos - old_unit_pos);
+                       meter_group->move (ArdourCanvas::Duple (0.0, tbpos - old_unit_pos));
                }
-               old_unit_pos = meter_bar_group->property_y();
+               old_unit_pos = meter_bar_group->position().y;
                if (tbgpos != old_unit_pos) {
-                       meter_bar_group->move ( 0.0, tbgpos - old_unit_pos);
-               }       
+                       meter_bar_group->move (ArdourCanvas::Duple (0.0, tbgpos - old_unit_pos));
+               }
                meter_bar_group->show();
                meter_group->show();
                meter_label.show();
@@ -626,15 +665,15 @@ Editor::update_ruler_visibility ()
                meter_group->hide();
                meter_label.hide();
        }
-       
+
        if (ruler_tempo_action->get_active()) {
-               old_unit_pos = tempo_group->property_y();
+               old_unit_pos = tempo_group->position().y;
                if (tbpos != old_unit_pos) {
-                       tempo_group->move(0.0, tbpos - old_unit_pos);
+                       tempo_group->move (ArdourCanvas::Duple (0.0, tbpos - old_unit_pos));
                }
-               old_unit_pos = tempo_bar_group->property_y();
+               old_unit_pos = tempo_bar_group->position().y;
                if (tbgpos != old_unit_pos) {
-                       tempo_bar_group->move ( 0.0, tbgpos - old_unit_pos);
+                       tempo_bar_group->move (ArdourCanvas::Duple (0.0, tbgpos - old_unit_pos));
                }
                tempo_bar_group->show();
                tempo_group->show();
@@ -647,15 +686,15 @@ Editor::update_ruler_visibility ()
                tempo_group->hide();
                tempo_label.hide();
        }
-       
+
        if (!Profile->get_sae() && ruler_range_action->get_active()) {
-               old_unit_pos = range_marker_group->property_y();
+               old_unit_pos = range_marker_group->position().y;
                if (tbpos != old_unit_pos) {
-                       range_marker_group->move (0.0, tbpos - old_unit_pos);
+                       range_marker_group->move (ArdourCanvas::Duple (0.0, tbpos - old_unit_pos));
                }
-               old_unit_pos = range_marker_bar_group->property_y();
+               old_unit_pos = range_marker_bar_group->position().y;
                if (tbgpos != old_unit_pos) {
-                       range_marker_bar_group->move (0.0, tbgpos - old_unit_pos);
+                       range_marker_bar_group->move (ArdourCanvas::Duple (0.0, tbgpos - old_unit_pos));
                }
                range_marker_bar_group->show();
                range_marker_group->show();
@@ -671,13 +710,13 @@ Editor::update_ruler_visibility ()
        }
 
        if (ruler_loop_punch_action->get_active()) {
-               old_unit_pos = transport_marker_group->property_y();
+               old_unit_pos = transport_marker_group->position().y;
                if (tbpos != old_unit_pos) {
-                       transport_marker_group->move ( 0.0, tbpos - old_unit_pos);
+                       transport_marker_group->move (ArdourCanvas::Duple (0.0, tbpos - old_unit_pos));
                }
-               old_unit_pos = transport_marker_bar_group->property_y();
+               old_unit_pos = transport_marker_bar_group->position().y;
                if (tbgpos != old_unit_pos) {
-                       transport_marker_bar_group->move ( 0.0, tbgpos - old_unit_pos);
+                       transport_marker_bar_group->move (ArdourCanvas::Duple (0.0, tbgpos - old_unit_pos));
                }
                transport_marker_bar_group->show();
                transport_marker_group->show();
@@ -692,13 +731,13 @@ Editor::update_ruler_visibility ()
        }
 
        if (ruler_cd_marker_action->get_active()) {
-               old_unit_pos = cd_marker_group->property_y();
+               old_unit_pos = cd_marker_group->position().y;
                if (tbpos != old_unit_pos) {
-                       cd_marker_group->move (0.0, tbpos - old_unit_pos);
+                       cd_marker_group->move (ArdourCanvas::Duple (0.0, tbpos - old_unit_pos));
                }
-               old_unit_pos = cd_marker_bar_group->property_y();
+               old_unit_pos = cd_marker_bar_group->position().y;
                if (tbgpos != old_unit_pos) {
-                       cd_marker_bar_group->move (0.0, tbgpos - old_unit_pos);
+                       cd_marker_bar_group->move (ArdourCanvas::Duple (0.0, tbgpos - old_unit_pos));
                }
                cd_marker_bar_group->show();
                cd_marker_group->show();
@@ -715,15 +754,15 @@ Editor::update_ruler_visibility ()
                // make sure all cd markers show up in their respective places
                update_cd_marker_display();
        }
-       
+
        if (ruler_marker_action->get_active()) {
-               old_unit_pos = marker_group->property_y();
+               old_unit_pos = marker_group->position().y;
                if (tbpos != old_unit_pos) {
-                       marker_group->move ( 0.0, tbpos - old_unit_pos);
+                       marker_group->move (ArdourCanvas::Duple (0.0, tbpos - old_unit_pos));
                }
-               old_unit_pos = marker_bar_group->property_y();
+               old_unit_pos = marker_bar_group->position().y;
                if (tbgpos != old_unit_pos) {
-                       marker_bar_group->move ( 0.0, tbgpos - old_unit_pos);
+                       marker_bar_group->move (ArdourCanvas::Duple (0.0, tbgpos - old_unit_pos));
                }
                marker_bar_group->show();
                marker_group->show();
@@ -737,81 +776,93 @@ Editor::update_ruler_visibility ()
                mark_label.hide();
        }
 
-       gdouble old_canvas_timebars_vsize = canvas_timebars_vsize;
-       canvas_timebars_vsize = (timebar_height * visible_timebars) - 1;
-       gdouble vertical_pos_delta = canvas_timebars_vsize - old_canvas_timebars_vsize;
-       vertical_adjustment.set_upper(vertical_adjustment.get_upper() + vertical_pos_delta);
-       full_canvas_height += vertical_pos_delta;
-
-       if (vertical_adjustment.get_value() != 0 && (vertical_adjustment.get_value() + _canvas_height >= full_canvas_height)) {
-               /*if we're at the bottom of the canvas, don't move the _trackview_group*/
-               vertical_adjustment.set_value (full_canvas_height - _canvas_height + 1);
+       if (ruler_video_action->get_active()) {
+               old_unit_pos = videotl_group->position().y;
+               if (tbpos != old_unit_pos) {
+                       videotl_group->move (ArdourCanvas::Duple (0.0, tbpos - old_unit_pos));
+               }
+               old_unit_pos = videotl_bar_group->position().y;
+               if (tbgpos != old_unit_pos) {
+                       videotl_bar_group->move (ArdourCanvas::Duple (0.0, tbgpos - old_unit_pos));
+               }
+               videotl_bar_group->show();
+               videotl_group->show();
+               videotl_label.show();
+               tbpos += timebar_height * videotl_bar_height;
+               tbgpos += timebar_height * videotl_bar_height;
+               visible_timebars+=videotl_bar_height;
+         queue_visual_videotimeline_update();
        } else {
-               _trackview_group->property_y () = - get_trackview_group_vertical_offset ();
-               _background_group->property_y () = - get_trackview_group_vertical_offset ();
-               _trackview_group->move (0, 0);
-               _background_group->move (0, 0);
-               last_trackview_group_vertical_offset = get_trackview_group_vertical_offset ();
-       }
-       
-       gdouble bottom_track_pos = vertical_adjustment.get_value() + _canvas_height - canvas_timebars_vsize;
-       std::pair<TimeAxisView*, int> const p = trackview_by_y_position (bottom_track_pos);
-       if (p.first) {
-               p.first->clip_to_viewport ();
+               videotl_bar_group->hide();
+               videotl_group->hide();
+               videotl_label.hide();
+         update_video_timeline(true);
        }
 
        ruler_label_vbox.set_size_request (-1, (int)(timebar_height * visible_rulers));
        time_canvas_vbox.set_size_request (-1,-1);
 
+       compute_fixed_ruler_scale ();
        update_fixed_rulers();
        redisplay_tempo (false);
+
+       /* Changing ruler visibility means that any lines on markers might need updating */
+       for (LocationMarkerMap::iterator i = location_markers.begin(); i != location_markers.end(); ++i) {
+               i->second->setup_lines ();
+       }
 }
 
 void
-Editor::update_just_smpte ()
+Editor::update_just_timecode ()
 {
-       ENSURE_GUI_THREAD(mem_fun(*this, &Editor::update_just_smpte));
-       
-       if (session == 0) {
+       ENSURE_GUI_THREAD (*this, &Editor::update_just_timecode)
+
+       if (_session == 0) {
                return;
        }
 
-       nframes64_t rightmost_frame = leftmost_frame + current_page_frames();
+       framepos_t rightmost_frame = leftmost_frame + current_page_frames();
 
        if (ruler_timecode_action->get_active()) {
-               gtk_custom_ruler_set_range (GTK_CUSTOM_RULER(_smpte_ruler), leftmost_frame, rightmost_frame,
-                                           leftmost_frame, session->current_end_frame());
+               gtk_custom_ruler_set_range (GTK_CUSTOM_RULER(_timecode_ruler), leftmost_frame, rightmost_frame,
+                                           leftmost_frame, _session->current_end_frame());
        }
 }
 
 void
 Editor::compute_fixed_ruler_scale ()
 {
-       if (session == 0) {
+       if (_session == 0) {
                return;
        }
 
        if (ruler_timecode_action->get_active()) {
-               set_smpte_ruler_scale (leftmost_frame, leftmost_frame + current_page_frames() );
+               set_timecode_ruler_scale (leftmost_frame, leftmost_frame + current_page_frames());
        }
-       
+
        if (ruler_minsec_action->get_active()) {
-               set_minsec_ruler_scale (leftmost_frame, leftmost_frame + current_page_frames() );
+               set_minsec_ruler_scale (leftmost_frame, leftmost_frame + current_page_frames());
+       }
+
+       if (ruler_samples_action->get_active()) {
+               set_samples_ruler_scale (leftmost_frame, leftmost_frame + current_page_frames());
        }
 }
 
 void
 Editor::update_fixed_rulers ()
 {
-       nframes64_t rightmost_frame;
+       framepos_t rightmost_frame;
 
-       if (session == 0) {
+       if (_session == 0) {
                return;
        }
 
-       ruler_metrics[ruler_metric_smpte].units_per_pixel = frames_per_unit;
-       ruler_metrics[ruler_metric_frames].units_per_pixel = frames_per_unit;
-       ruler_metrics[ruler_metric_minsec].units_per_pixel = frames_per_unit;
+       compute_fixed_ruler_scale ();
+
+       ruler_metrics[ruler_metric_timecode].units_per_pixel = frames_per_pixel;
+       ruler_metrics[ruler_metric_samples].units_per_pixel = frames_per_pixel;
+       ruler_metrics[ruler_metric_minsec].units_per_pixel = frames_per_pixel;
 
        rightmost_frame = leftmost_frame + current_page_frames();
 
@@ -820,42 +871,46 @@ Editor::update_fixed_rulers ()
        */
 
        if (ruler_timecode_action->get_active()) {
-               gtk_custom_ruler_set_range (GTK_CUSTOM_RULER(_smpte_ruler), leftmost_frame, rightmost_frame,
-                                           leftmost_frame, session->current_end_frame());
+               gtk_custom_ruler_set_range (GTK_CUSTOM_RULER(_timecode_ruler), leftmost_frame, rightmost_frame,
+                                           leftmost_frame, _session->current_end_frame());
        }
-       
+
        if (ruler_samples_action->get_active()) {
-               gtk_custom_ruler_set_range (GTK_CUSTOM_RULER(_frames_ruler), leftmost_frame, rightmost_frame,
-                                           leftmost_frame, session->current_end_frame());
+               gtk_custom_ruler_set_range (GTK_CUSTOM_RULER (_samples_ruler), leftmost_frame, rightmost_frame,
+                                           leftmost_frame, _session->current_end_frame());
        }
-       
+
        if (ruler_minsec_action->get_active()) {
                gtk_custom_ruler_set_range (GTK_CUSTOM_RULER(_minsec_ruler), leftmost_frame, rightmost_frame,
-                                           leftmost_frame, session->current_end_frame());
+                                           leftmost_frame, _session->current_end_frame());
        }
-}              
+}
 
 void
-Editor::update_tempo_based_rulers ()
+Editor::update_tempo_based_rulers (ARDOUR::TempoMap::BBTPointList::const_iterator& begin,
+                                   ARDOUR::TempoMap::BBTPointList::const_iterator& end)
 {
-       if (session == 0) {
+       if (_session == 0) {
                return;
        }
 
-       ruler_metrics[ruler_metric_bbt].units_per_pixel = frames_per_unit;
-       
+       compute_bbt_ruler_scale (leftmost_frame, leftmost_frame+current_page_frames(),
+                                begin, end);
+
+       ruler_metrics[ruler_metric_bbt].units_per_pixel = frames_per_pixel;
+
        if (ruler_bbt_action->get_active()) {
                gtk_custom_ruler_set_range (GTK_CUSTOM_RULER(_bbt_ruler), leftmost_frame, leftmost_frame+current_page_frames(),
-                                           leftmost_frame, session->current_end_frame());
+                                           leftmost_frame, _session->current_end_frame());
        }
 }
 
 /* Mark generation */
 
 gint
-Editor::_metric_get_smpte (GtkCustomRulerMark **marks, gdouble lower, gdouble upper, gint maxchars)
+Editor::_metric_get_timecode (GtkCustomRulerMark **marks, gdouble lower, gdouble upper, gint maxchars)
 {
-       return ruler_editor->metric_get_smpte (marks, lower, upper, maxchars);
+       return ruler_editor->metric_get_timecode (marks, lower, upper, maxchars);
 }
 
 gint
@@ -865,9 +920,9 @@ Editor::_metric_get_bbt (GtkCustomRulerMark **marks, gdouble lower, gdouble uppe
 }
 
 gint
-Editor::_metric_get_frames (GtkCustomRulerMark **marks, gdouble lower, gdouble upper, gint maxchars)
+Editor::_metric_get_samples (GtkCustomRulerMark **marks, gdouble lower, gdouble upper, gint maxchars)
 {
-       return ruler_editor->metric_get_frames (marks, lower, upper, maxchars);
+       return ruler_editor->metric_get_samples (marks, lower, upper, maxchars);
 }
 
 gint
@@ -877,382 +932,437 @@ Editor::_metric_get_minsec (GtkCustomRulerMark **marks, gdouble lower, gdouble u
 }
 
 void
-Editor::set_smpte_ruler_scale (gdouble lower, gdouble upper)
+Editor::set_timecode_ruler_scale (framepos_t lower, framepos_t upper)
 {
-       nframes64_t range;
-       nframes64_t spacer;
-       nframes64_t fr;
+       framepos_t spacer;
+       framepos_t fr;
 
-       if (session == 0) {
+       if (_session == 0) {
                return;
        }
 
-       fr = session->frame_rate();
+       fr = _session->frame_rate();
 
-       if (lower > (spacer = (nframes64_t)(128 * Editor::get_current_zoom ()))) {
+       if (lower > (spacer = (framepos_t) (128 * Editor::get_current_zoom ()))) {
                lower = lower - spacer;
        } else {
                lower = 0;
        }
        upper = upper + spacer;
-       range = (nframes64_t) floor (upper - lower);
+       framecnt_t const range = upper - lower;
 
-       if (range < (2 * session->frames_per_smpte_frame())) { /* 0 - 2 frames */
-               smpte_ruler_scale = smpte_show_bits;
-               smpte_mark_modulo = 20;
-               smpte_nmarks = 2 + (2 * session->config.get_subframes_per_frame());
+       if (range < (2 * _session->frames_per_timecode_frame())) { /* 0 - 2 frames */
+               timecode_ruler_scale = timecode_show_bits;
+               timecode_mark_modulo = 20;
+               timecode_nmarks = 2 + (2 * _session->config.get_subframes_per_frame());
        } else if (range <= (fr / 4)) { /* 2 frames - 0.250 second */
-               smpte_ruler_scale = smpte_show_frames;
-               smpte_mark_modulo = 1;
-               smpte_nmarks = 2 + (range / (nframes64_t)session->frames_per_smpte_frame());
+               timecode_ruler_scale = timecode_show_frames;
+               timecode_mark_modulo = 1;
+               timecode_nmarks = 2 + (range / (framepos_t)_session->frames_per_timecode_frame());
        } else if (range <= (fr / 2)) { /* 0.25-0.5 second */
-               smpte_ruler_scale = smpte_show_frames;
-               smpte_mark_modulo = 2;
-               smpte_nmarks = 2 + (range / (nframes64_t)session->frames_per_smpte_frame());
+               timecode_ruler_scale = timecode_show_frames;
+               timecode_mark_modulo = 2;
+               timecode_nmarks = 2 + (range / (framepos_t)_session->frames_per_timecode_frame());
        } else if (range <= fr) { /* 0.5-1 second */
-               smpte_ruler_scale = smpte_show_frames;
-               smpte_mark_modulo = 5;
-               smpte_nmarks = 2 + (range / (nframes64_t)session->frames_per_smpte_frame());
+               timecode_ruler_scale = timecode_show_frames;
+               timecode_mark_modulo = 5;
+               timecode_nmarks = 2 + (range / (framepos_t)_session->frames_per_timecode_frame());
        } else if (range <= 2 * fr) { /* 1-2 seconds */
-               smpte_ruler_scale = smpte_show_frames;
-               smpte_mark_modulo = 10;
-               smpte_nmarks = 2 + (range / (nframes64_t)session->frames_per_smpte_frame());
+               timecode_ruler_scale = timecode_show_frames;
+               timecode_mark_modulo = 10;
+               timecode_nmarks = 2 + (range / (framepos_t)_session->frames_per_timecode_frame());
        } else if (range <= 8 * fr) { /* 2-8 seconds */
-               smpte_ruler_scale = smpte_show_seconds;
-               smpte_mark_modulo = 1;
-               smpte_nmarks = 2 + (range / fr);
+               timecode_ruler_scale = timecode_show_seconds;
+               timecode_mark_modulo = 1;
+               timecode_nmarks = 2 + (range / fr);
        } else if (range <= 16 * fr) { /* 8-16 seconds */
-               smpte_ruler_scale = smpte_show_seconds;
-               smpte_mark_modulo = 2;
-               smpte_nmarks = 2 + (range / fr);
+               timecode_ruler_scale = timecode_show_seconds;
+               timecode_mark_modulo = 2;
+               timecode_nmarks = 2 + (range / fr);
        } else if (range <= 30 * fr) { /* 16-30 seconds */
-               smpte_ruler_scale = smpte_show_seconds;
-               smpte_mark_modulo = 5;
-               smpte_nmarks = 2 + (range / fr);
+               timecode_ruler_scale = timecode_show_seconds;
+               timecode_mark_modulo = 5;
+               timecode_nmarks = 2 + (range / fr);
        } else if (range <= 60 * fr) { /* 30-60 seconds */
-               smpte_ruler_scale = smpte_show_seconds;
-               smpte_mark_modulo = 5;
-               smpte_nmarks = 2 + (range / fr);
+               timecode_ruler_scale = timecode_show_seconds;
+               timecode_mark_modulo = 5;
+               timecode_nmarks = 2 + (range / fr);
        } else if (range <= 2 * 60 * fr) { /* 1-2 minutes */
-               smpte_ruler_scale = smpte_show_seconds;
-               smpte_mark_modulo = 15;
-               smpte_nmarks = 2 + (range / fr);
+               timecode_ruler_scale = timecode_show_seconds;
+               timecode_mark_modulo = 15;
+               timecode_nmarks = 2 + (range / fr);
        } else if (range <= 4 * 60 * fr) { /* 2-4 minutes */
-               smpte_ruler_scale = smpte_show_seconds;
-               smpte_mark_modulo = 30;
-               smpte_nmarks = 2 + (range / fr);
+               timecode_ruler_scale = timecode_show_seconds;
+               timecode_mark_modulo = 30;
+               timecode_nmarks = 2 + (range / fr);
        } else if (range <= 10 * 60 * fr) { /* 4-10 minutes */
-               smpte_ruler_scale = smpte_show_minutes;
-               smpte_mark_modulo = 2;
-               smpte_nmarks = 2 + 10;
+               timecode_ruler_scale = timecode_show_minutes;
+               timecode_mark_modulo = 2;
+               timecode_nmarks = 2 + 10;
        } else if (range <= 30 * 60 * fr) { /* 10-30 minutes */
-               smpte_ruler_scale = smpte_show_minutes;
-               smpte_mark_modulo = 5;
-               smpte_nmarks = 2 + 30;
+               timecode_ruler_scale = timecode_show_minutes;
+               timecode_mark_modulo = 5;
+               timecode_nmarks = 2 + 30;
        } else if (range <= 60 * 60 * fr) { /* 30 minutes - 1hr */
-               smpte_ruler_scale = smpte_show_minutes;
-               smpte_mark_modulo = 10;
-               smpte_nmarks = 2 + 60;
+               timecode_ruler_scale = timecode_show_minutes;
+               timecode_mark_modulo = 10;
+               timecode_nmarks = 2 + 60;
        } else if (range <= 4 * 60 * 60 * fr) { /* 1 - 4 hrs*/
-               smpte_ruler_scale = smpte_show_minutes;
-               smpte_mark_modulo = 30;
-               smpte_nmarks = 2 + (60 * 4);
+               timecode_ruler_scale = timecode_show_minutes;
+               timecode_mark_modulo = 30;
+               timecode_nmarks = 2 + (60 * 4);
        } else if (range <= 8 * 60 * 60 * fr) { /* 4 - 8 hrs*/
-               smpte_ruler_scale = smpte_show_hours;
-               smpte_mark_modulo = 1;
-               smpte_nmarks = 2 + 8;
+               timecode_ruler_scale = timecode_show_hours;
+               timecode_mark_modulo = 1;
+               timecode_nmarks = 2 + 8;
        } else if (range <= 16 * 60 * 60 * fr) { /* 16-24 hrs*/
-               smpte_ruler_scale = smpte_show_hours;
-               smpte_mark_modulo = 1;
-               smpte_nmarks = 2 + 24;
+               timecode_ruler_scale = timecode_show_hours;
+               timecode_mark_modulo = 1;
+               timecode_nmarks = 2 + 24;
        } else {
-    
-               /* not possible if nframes64_t is a 32 bit quantity */
-    
-               smpte_ruler_scale = smpte_show_hours;
-               smpte_mark_modulo = 4;
-               smpte_nmarks = 2 + 24;
-       }
-  
+
+               /* not possible if framepos_t is a 32 bit quantity */
+
+               timecode_ruler_scale = timecode_show_hours;
+               timecode_mark_modulo = 4;
+               timecode_nmarks = 2 + 24;
+       }
+
 }
 
 gint
-Editor::metric_get_smpte (GtkCustomRulerMark **marks, gdouble lower, gdouble /*upper*/, gint /*maxchars*/)
+Editor::metric_get_timecode (GtkCustomRulerMark **marks, gdouble lower, gdouble /*upper*/, gint /*maxchars*/)
 {
-       nframes_t pos;
-       nframes64_t spacer;
-       SMPTE::Time smpte;
+       framepos_t pos;
+       framecnt_t spacer;
+       Timecode::Time timecode;
        gchar buf[16];
        gint n;
 
-       if (session == 0) {
+       if (_session == 0) {
                return 0;
        }
 
-       if (lower > (spacer = (nframes64_t)(128 * Editor::get_current_zoom ()))) {
+       if (lower > (spacer = (framecnt_t)(128 * Editor::get_current_zoom ()))) {
                lower = lower - spacer;
        } else {
                lower = 0;
        }
 
-       pos = (nframes_t) floor (lower);
-       
-       *marks = (GtkCustomRulerMark *) g_malloc (sizeof(GtkCustomRulerMark) * smpte_nmarks);  
-       switch (smpte_ruler_scale) {
-       case smpte_show_bits:
+       pos = (framecnt_t) floor (lower);
+
+       *marks = (GtkCustomRulerMark *) g_malloc (sizeof(GtkCustomRulerMark) * timecode_nmarks);
+       switch (timecode_ruler_scale) {
+       case timecode_show_bits:
 
-               // Find smpte time of this sample (pos) with subframe accuracy
-               session->sample_to_smpte(pos, smpte, true /* use_offset */, true /* use_subframes */ );
-    
-               for (n = 0; n < smpte_nmarks; n++) {
-                       session->smpte_to_sample(smpte, pos, true /* use_offset */, true /* use_subframes */ );
-                       if ((smpte.subframes % smpte_mark_modulo) == 0) {
-                               if (smpte.subframes == 0) {
+               // Find timecode time of this sample (pos) with subframe accuracy
+               _session->sample_to_timecode(pos, timecode, true /* use_offset */, true /* use_subframes */ );
+
+               for (n = 0; n < timecode_nmarks; n++) {
+                       _session->timecode_to_sample(timecode, pos, true /* use_offset */, true /* use_subframes */ );
+                       if ((timecode.subframes % timecode_mark_modulo) == 0) {
+                               if (timecode.subframes == 0) {
                                        (*marks)[n].style = GtkCustomRulerMarkMajor;
-                                       snprintf (buf, sizeof(buf), "%s%02u:%02u:%02u:%02u", smpte.negative ? "-" : "", smpte.hours, smpte.minutes, smpte.seconds, smpte.frames);
+                                       snprintf (buf, sizeof(buf), "%s%02u:%02u:%02u:%02u", timecode.negative ? "-" : "", timecode.hours, timecode.minutes, timecode.seconds, timecode.frames);
                                } else {
                                        (*marks)[n].style = GtkCustomRulerMarkMinor;
-                                       snprintf (buf, sizeof(buf), ".%02u", smpte.subframes);
+                                       snprintf (buf, sizeof(buf), ".%02u", timecode.subframes);
                                }
                        } else {
                                snprintf (buf, sizeof(buf)," ");
                                (*marks)[n].style = GtkCustomRulerMarkMicro;
-        
+
                        }
                        (*marks)[n].label = g_strdup (buf);
                        (*marks)[n].position = pos;
 
                        // Increment subframes by one
-                       SMPTE::increment_subframes( smpte, session->config.get_subframes_per_frame() );
+                       Timecode::increment_subframes( timecode, _session->config.get_subframes_per_frame() );
                }
          break;
-       case smpte_show_seconds:
-               // Find smpte time of this sample (pos)
-               session->sample_to_smpte(pos, smpte, true /* use_offset */, false /* use_subframes */ );
+       case timecode_show_seconds:
+               // Find timecode time of this sample (pos)
+               _session->sample_to_timecode(pos, timecode, true /* use_offset */, false /* use_subframes */ );
                // Go to next whole second down
-               SMPTE::seconds_floor( smpte );
+               Timecode::seconds_floor( timecode );
 
-               for (n = 0; n < smpte_nmarks; n++) {
-                       session->smpte_to_sample(smpte, pos, true /* use_offset */, false /* use_subframes */ );
-                       if ((smpte.seconds % smpte_mark_modulo) == 0) {
-                               if (smpte.seconds == 0) {
+               for (n = 0; n < timecode_nmarks; n++) {
+                       _session->timecode_to_sample(timecode, pos, true /* use_offset */, false /* use_subframes */ );
+                       if ((timecode.seconds % timecode_mark_modulo) == 0) {
+                               if (timecode.seconds == 0) {
                                        (*marks)[n].style = GtkCustomRulerMarkMajor;
                                        (*marks)[n].position = pos;
                                } else {
                                        (*marks)[n].style = GtkCustomRulerMarkMinor;
                                        (*marks)[n].position = pos;
                                }
-                               snprintf (buf, sizeof(buf), "%s%02u:%02u:%02u:%02u", smpte.negative ? "-" : "", smpte.hours, smpte.minutes, smpte.seconds, smpte.frames);
+                               snprintf (buf, sizeof(buf), "%s%02u:%02u:%02u:%02u", timecode.negative ? "-" : "", timecode.hours, timecode.minutes, timecode.seconds, timecode.frames);
                        } else {
                                snprintf (buf, sizeof(buf)," ");
                                (*marks)[n].style = GtkCustomRulerMarkMicro;
                                (*marks)[n].position = pos;
-        
+
                        }
                        (*marks)[n].label = g_strdup (buf);
-                       SMPTE::increment_seconds( smpte, session->config.get_subframes_per_frame() );
+                       Timecode::increment_seconds( timecode, _session->config.get_subframes_per_frame() );
                }
          break;
-       case smpte_show_minutes:
-               // Find smpte time of this sample (pos)
-               session->sample_to_smpte(pos, smpte, true /* use_offset */, false /* use_subframes */ );
+       case timecode_show_minutes:
+               // Find timecode time of this sample (pos)
+               _session->sample_to_timecode(pos, timecode, true /* use_offset */, false /* use_subframes */ );
                // Go to next whole minute down
-               SMPTE::minutes_floor( smpte );
+               Timecode::minutes_floor( timecode );
 
-               for (n = 0; n < smpte_nmarks; n++) {
-                       session->smpte_to_sample(smpte, pos, true /* use_offset */, false /* use_subframes */ );
-                       if ((smpte.minutes % smpte_mark_modulo) == 0) {
-                               if (smpte.minutes == 0) {
+               for (n = 0; n < timecode_nmarks; n++) {
+                       _session->timecode_to_sample(timecode, pos, true /* use_offset */, false /* use_subframes */ );
+                       if ((timecode.minutes % timecode_mark_modulo) == 0) {
+                               if (timecode.minutes == 0) {
                                        (*marks)[n].style = GtkCustomRulerMarkMajor;
                                } else {
                                        (*marks)[n].style = GtkCustomRulerMarkMinor;
                                }
-                               snprintf (buf, sizeof(buf), "%s%02u:%02u:%02u:%02u", smpte.negative ? "-" : "", smpte.hours, smpte.minutes, smpte.seconds, smpte.frames);
+                               snprintf (buf, sizeof(buf), "%s%02u:%02u:%02u:%02u", timecode.negative ? "-" : "", timecode.hours, timecode.minutes, timecode.seconds, timecode.frames);
                        } else {
                                snprintf (buf, sizeof(buf)," ");
                                (*marks)[n].style = GtkCustomRulerMarkMicro;
-        
+
                        }
                        (*marks)[n].label = g_strdup (buf);
                        (*marks)[n].position = pos;
-                       SMPTE::increment_minutes( smpte, session->config.get_subframes_per_frame() );
+
+                       Timecode::increment_minutes( timecode, _session->config.get_subframes_per_frame() );
                }
 
          break;
-       case smpte_show_hours:
-               // Find smpte time of this sample (pos)
-               session->sample_to_smpte(pos, smpte, true /* use_offset */, false /* use_subframes */ );
+       case timecode_show_hours:
+               // Find timecode time of this sample (pos)
+               _session->sample_to_timecode(pos, timecode, true /* use_offset */, false /* use_subframes */ );
                // Go to next whole hour down
-               SMPTE::hours_floor( smpte );
+               Timecode::hours_floor( timecode );
 
-               for (n = 0; n < smpte_nmarks; n++) {
-                       session->smpte_to_sample(smpte, pos, true /* use_offset */, false /* use_subframes */ );
-                       if ((smpte.hours % smpte_mark_modulo) == 0) {
+               for (n = 0; n < timecode_nmarks; n++) {
+                       _session->timecode_to_sample(timecode, pos, true /* use_offset */, false /* use_subframes */ );
+                       if ((timecode.hours % timecode_mark_modulo) == 0) {
                                (*marks)[n].style = GtkCustomRulerMarkMajor;
-                               snprintf (buf, sizeof(buf), "%s%02u:%02u:%02u:%02u", smpte.negative ? "-" : "", smpte.hours, smpte.minutes, smpte.seconds, smpte.frames);
+                               snprintf (buf, sizeof(buf), "%s%02u:%02u:%02u:%02u", timecode.negative ? "-" : "", timecode.hours, timecode.minutes, timecode.seconds, timecode.frames);
                        } else {
                                snprintf (buf, sizeof(buf)," ");
                                (*marks)[n].style = GtkCustomRulerMarkMicro;
-        
+
                        }
                        (*marks)[n].label = g_strdup (buf);
                        (*marks)[n].position = pos;
 
-                       SMPTE::increment_hours( smpte, session->config.get_subframes_per_frame() );
+                       Timecode::increment_hours( timecode, _session->config.get_subframes_per_frame() );
                }
          break;
-       case smpte_show_frames:
-               // Find smpte time of this sample (pos)
-               session->sample_to_smpte(pos, smpte, true /* use_offset */, false /* use_subframes */ );
+       case timecode_show_frames:
+               // Find timecode time of this sample (pos)
+               _session->sample_to_timecode(pos, timecode, true /* use_offset */, false /* use_subframes */ );
                // Go to next whole frame down
-               SMPTE::frames_floor( smpte );
+               Timecode::frames_floor( timecode );
 
-               for (n = 0; n < smpte_nmarks; n++) {
-                       session->smpte_to_sample(smpte, pos, true /* use_offset */, false /* use_subframes */ );
-                       if ((smpte.frames % smpte_mark_modulo) == 0)  {
-                               if (smpte.frames == 0) {
+               for (n = 0; n < timecode_nmarks; n++) {
+                       _session->timecode_to_sample(timecode, pos, true /* use_offset */, false /* use_subframes */ );
+                       if ((timecode.frames % timecode_mark_modulo) == 0)  {
+                               if (timecode.frames == 0) {
                                  (*marks)[n].style = GtkCustomRulerMarkMajor;
                                } else {
                                  (*marks)[n].style = GtkCustomRulerMarkMinor;
                                }
                                (*marks)[n].position = pos;
-                               snprintf (buf, sizeof(buf), "%s%02u:%02u:%02u:%02u", smpte.negative ? "-" : "", smpte.hours, smpte.minutes, smpte.seconds, smpte.frames);
+                               snprintf (buf, sizeof(buf), "%s%02u:%02u:%02u:%02u", timecode.negative ? "-" : "", timecode.hours, timecode.minutes, timecode.seconds, timecode.frames);
                        } else {
                                snprintf (buf, sizeof(buf)," ");
                                (*marks)[n].style = GtkCustomRulerMarkMicro;
                                (*marks)[n].position = pos;
-        
+
                        }
                        (*marks)[n].label = g_strdup (buf);
-                       SMPTE::increment( smpte, session->config.get_subframes_per_frame() );
+                       Timecode::increment( timecode, _session->config.get_subframes_per_frame() );
                }
 
          break;
        }
-  
-       return smpte_nmarks;
+
+       return timecode_nmarks;
 }
 
 
 void
-Editor::compute_bbt_ruler_scale (nframes64_t lower, nframes64_t upper)
+Editor::compute_bbt_ruler_scale (framepos_t lower, framepos_t upper,
+                                ARDOUR::TempoMap::BBTPointList::const_iterator begin,
+                                ARDOUR::TempoMap::BBTPointList::const_iterator end)
 {
-        if (session == 0) {
-                return;
-        }
-       TempoMap::BBTPointList::iterator i;
-        BBT_Time lower_beat, upper_beat; // the beats at each end of the ruler
+       if (_session == 0) {
+               return;
+       }
+
+       TempoMap::BBTPointList::const_iterator i;
+       Timecode::BBT_Time lower_beat, upper_beat; // the beats at each end of the ruler
 
-        session->bbt_time((jack_nframes_t) lower, lower_beat);
-        session->bbt_time((jack_nframes_t) upper, upper_beat);
-        uint32_t beats = 0;
+       _session->bbt_time (lower, lower_beat);
+       _session->bbt_time (upper, upper_beat);
+       uint32_t beats = 0;
 
        bbt_accent_modulo = 1;
        bbt_bar_helper_on = false;
-        bbt_bars = 0;
-        bbt_nmarks = 1;
+       bbt_bars = 0;
+       bbt_nmarks = 1;
 
        bbt_ruler_scale =  bbt_over;
-  
-       switch (snap_type) {
-       case SnapToAThirdBeat:
+
+       switch (_snap_type) {
+       case SnapToBeatDiv2:
+               bbt_beat_subdivision = 2;
+               break;
+       case SnapToBeatDiv3:
                 bbt_beat_subdivision = 3;
                break;
-       case SnapToAQuarterBeat:
+       case SnapToBeatDiv4:
                 bbt_beat_subdivision = 4;
                break;
-       case SnapToAEighthBeat:
+       case SnapToBeatDiv5:
+                bbt_beat_subdivision = 5;
+               bbt_accent_modulo = 2; // XXX YIKES
+               break;
+       case SnapToBeatDiv6:
+                bbt_beat_subdivision = 6;
+               bbt_accent_modulo = 2; // XXX YIKES
+               break;
+       case SnapToBeatDiv7:
+                bbt_beat_subdivision = 7;
+               bbt_accent_modulo = 2; // XXX YIKES
+               break;
+       case SnapToBeatDiv8:
                 bbt_beat_subdivision = 8;
                bbt_accent_modulo = 2;
                break;
-       case SnapToASixteenthBeat:
+       case SnapToBeatDiv10:
+                bbt_beat_subdivision = 10;
+               bbt_accent_modulo = 2; // XXX YIKES
+               break;
+       case SnapToBeatDiv12:
+                bbt_beat_subdivision = 12;
+               bbt_accent_modulo = 3;
+               break;
+       case SnapToBeatDiv14:
+                bbt_beat_subdivision = 14;
+               bbt_accent_modulo = 3; // XXX YIKES!
+               break;
+       case SnapToBeatDiv16:
                 bbt_beat_subdivision = 16;
                bbt_accent_modulo = 4;
                break;
-       case SnapToAThirtysecondBeat:
+       case SnapToBeatDiv20:
+                bbt_beat_subdivision = 20;
+               bbt_accent_modulo = 5;
+               break;
+       case SnapToBeatDiv24:
+                bbt_beat_subdivision = 24;
+               bbt_accent_modulo = 6;
+               break;
+       case SnapToBeatDiv28:
+                bbt_beat_subdivision = 28;
+               bbt_accent_modulo = 7;
+               break;
+       case SnapToBeatDiv32:
                 bbt_beat_subdivision = 32;
                bbt_accent_modulo = 8;
                break;
+       case SnapToBeatDiv64:
+                bbt_beat_subdivision = 64;
+               bbt_accent_modulo = 8;
+               break;
+       case SnapToBeatDiv128:
+                bbt_beat_subdivision = 128;
+               bbt_accent_modulo = 8;
+               break;
        default:
                 bbt_beat_subdivision = 4;
                break;
        }
 
-       if (current_bbt_points == 0 || current_bbt_points->empty()) {
+       if (distance (begin, end) == 0) {
                return;
        }
 
-       i = current_bbt_points->end();
+       i = end;
        i--;
-       if ((*i).beat >= (*current_bbt_points->begin()).beat) {
-         bbt_bars = (*i).bar - (*current_bbt_points->begin()).bar;
+       if ((*i).beat >= (*begin).beat) {
+               bbt_bars = (*i).bar - (*begin).bar;
        } else {
-         bbt_bars = (*i).bar - (*current_bbt_points->begin()).bar - 1;
+               bbt_bars = (*i).bar - (*begin).bar - 1;
        }
-       beats = current_bbt_points->size() - bbt_bars;
+       beats = distance (begin, end) - bbt_bars;
 
-       /*Only show the bar helper if there aren't many bars on the screen */
+       /* Only show the bar helper if there aren't many bars on the screen */
        if ((bbt_bars < 2) || (beats < 5)) {
                bbt_bar_helper_on = true;
        }
 
        if (bbt_bars > 8192) {
-         bbt_ruler_scale =  bbt_over;
+               bbt_ruler_scale =  bbt_over;
        } else if (bbt_bars > 1024) {
-         bbt_ruler_scale = bbt_show_64;
+               bbt_ruler_scale = bbt_show_64;
        } else if (bbt_bars > 256) {
-         bbt_ruler_scale = bbt_show_16;
+               bbt_ruler_scale = bbt_show_16;
        } else if (bbt_bars > 64) {
-         bbt_ruler_scale = bbt_show_4;
+               bbt_ruler_scale = bbt_show_4;
        } else if (bbt_bars > 10) {
-         bbt_ruler_scale =  bbt_show_1;
+               bbt_ruler_scale =  bbt_show_1;
        } else if (bbt_bars > 2) {
-         bbt_ruler_scale =  bbt_show_beats;
+               bbt_ruler_scale =  bbt_show_beats;
        } else  if (bbt_bars > 0) {
-         bbt_ruler_scale =  bbt_show_ticks;
+               bbt_ruler_scale =  bbt_show_ticks;
        } else {
-         bbt_ruler_scale =  bbt_show_ticks_detail;
-       } 
+               bbt_ruler_scale =  bbt_show_ticks_detail;
+       }
 
-       if ((bbt_ruler_scale == bbt_show_ticks_detail) && (lower_beat.beats == upper_beat.beats) && (upper_beat.ticks - lower_beat.ticks <= Meter::ticks_per_beat / 4)) {
+       if ((bbt_ruler_scale == bbt_show_ticks_detail) && (lower_beat.beats == upper_beat.beats) && (upper_beat.ticks - lower_beat.ticks <= Timecode::BBT_Time::ticks_per_beat / 4)) {
                bbt_ruler_scale =  bbt_show_ticks_super_detail;
        }
 }
 
 gint
-Editor::metric_get_bbt (GtkCustomRulerMark **marks, gdouble lower, gdouble /*upper*/, gint /*maxchars*/)
+Editor::metric_get_bbt (GtkCustomRulerMark **marks, gdouble lower, gdouble upper, gint /*maxchars*/)
 {
-        if (session == 0) {
-                return 0;
-        }
+       if (_session == 0) {
+               return 0;
+       }
 
-       TempoMap::BBTPointList::iterator i;
+       TempoMap::BBTPointList::const_iterator i;
 
-        char buf[64];
-        gint  n = 0;
-       nframes64_t pos;
-       BBT_Time next_beat;
-       nframes64_t next_beat_pos;
-        uint32_t beats = 0;
+       char buf[64];
+       gint  n = 0;
+       framepos_t pos;
+       Timecode::BBT_Time next_beat;
+       framepos_t next_beat_pos;
+       uint32_t beats = 0;
 
        uint32_t tick = 0;
        uint32_t skip;
        uint32_t t;
-       nframes64_t frame_skip;
+       framepos_t frame_skip;
        double frame_skip_error;
        double bbt_position_of_helper;
        double accumulated_error;
        bool i_am_accented = false;
        bool helper_active = false;
 
-       if (current_bbt_points == 0 || current_bbt_points->empty()) {
+       ARDOUR::TempoMap::BBTPointList::const_iterator begin;
+       ARDOUR::TempoMap::BBTPointList::const_iterator end;
+
+       compute_current_bbt_points (lower, upper, begin, end);
+
+       if (distance (begin, end) == 0) {
                return 0;
        }
 
        switch (bbt_ruler_scale) {
 
        case bbt_show_beats:
-               beats = current_bbt_points->size();
+               beats = distance (begin, end);
                bbt_nmarks = beats + 2;
 
                *marks = (GtkCustomRulerMark *) g_malloc (sizeof(GtkCustomRulerMark) * bbt_nmarks);
@@ -1261,17 +1371,15 @@ Editor::metric_get_bbt (GtkCustomRulerMark **marks, gdouble lower, gdouble /*upp
                (*marks)[0].position = lower;
                (*marks)[0].style = GtkCustomRulerMarkMicro;
                
-               for (n = 1,   i = current_bbt_points->begin(); n < bbt_nmarks && i != current_bbt_points->end(); ++i) {
-                       if  ((*i).type != TempoMap::Beat) {
-                               continue;
-                       }
+               for (n = 1, i = begin; n < bbt_nmarks && i != end; ++i) {
+
                        if ((*i).frame < lower && (bbt_bar_helper_on)) {
                                snprintf (buf, sizeof(buf), "<%" PRIu32 "|%" PRIu32, (*i).bar, (*i).beat);
-                               (*marks)[0].label = g_strdup (buf); 
+                               (*marks)[0].label = g_strdup (buf);
                                helper_active = true;
                        } else {
 
-                               if ((*i).beat == 1) {
+                               if ((*i).is_bar()) {
                                        (*marks)[n].style = GtkCustomRulerMarkMajor;
                                        snprintf (buf, sizeof(buf), "%" PRIu32, (*i).bar);
                                } else if (((*i).beat % 2 == 1)) {
@@ -1290,7 +1398,7 @@ Editor::metric_get_bbt (GtkCustomRulerMark **marks, gdouble lower, gdouble /*upp
 
        case bbt_show_ticks:
 
-               beats = current_bbt_points->size();
+               beats = distance (begin, end);
                bbt_nmarks = (beats + 2) * bbt_beat_subdivision;
 
                bbt_position_of_helper = lower + (30 * Editor::get_current_zoom ());
@@ -1299,18 +1407,16 @@ Editor::metric_get_bbt (GtkCustomRulerMark **marks, gdouble lower, gdouble /*upp
                (*marks)[0].label = g_strdup(" ");
                (*marks)[0].position = lower;
                (*marks)[0].style = GtkCustomRulerMarkMicro;
-               
-               for (n = 1,   i = current_bbt_points->begin(); n < bbt_nmarks && i != current_bbt_points->end(); ++i) {
-                       if  ((*i).type != TempoMap::Beat) {
-                               continue;
-                       }
+
+               for (n = 1, i = begin; n < bbt_nmarks && i != end; ++i) {
+
                        if ((*i).frame < lower && (bbt_bar_helper_on)) {
                                snprintf (buf, sizeof(buf), "<%" PRIu32 "|%" PRIu32, (*i).bar, (*i).beat);
-                               (*marks)[0].label = g_strdup (buf); 
+                               (*marks)[0].label = g_strdup (buf);
                                helper_active = true;
                        } else {
 
-                               if ((*i).beat == 1) {
+                               if ((*i).is_bar()) {
                                        (*marks)[n].style = GtkCustomRulerMarkMajor;
                                        snprintf (buf, sizeof(buf), "%" PRIu32, (*i).bar);
                                } else {
@@ -1324,33 +1430,33 @@ Editor::metric_get_bbt (GtkCustomRulerMark **marks, gdouble lower, gdouble /*upp
                                (*marks)[n].position = (*i).frame;
                                n++;
                        }
-                       
+
                        /* Add the tick marks */
 
                        /* Find the next beat */
                        next_beat.beats = (*i).beat;
                        next_beat.bars = (*i).bar;
                        next_beat.ticks = 0;
-                       
-                       if ((*i).meter->beats_per_bar() > (next_beat.beats + 1)) {
+
+                       if ((*i).meter->divisions_per_bar() > (next_beat.beats + 1)) {
                                  next_beat.beats += 1;
                        } else {
                                  next_beat.bars += 1;
                                  next_beat.beats = 1;
                        }
-                               
-                       next_beat_pos = session->tempo_map().frame_time(next_beat);
-                       
-                       frame_skip = (nframes64_t) floor (frame_skip_error = (session->frame_rate() *  60) / (bbt_beat_subdivision * (*i).tempo->beats_per_minute()));
+
+                       next_beat_pos = _session->tempo_map().frame_time(next_beat);
+
+                       frame_skip = (framepos_t) floor (frame_skip_error = (_session->frame_rate() *  60) / (bbt_beat_subdivision * (*i).tempo->beats_per_minute()));
                        frame_skip_error -= frame_skip;
-                       skip = (uint32_t) (Meter::ticks_per_beat / bbt_beat_subdivision);
+                       skip = (uint32_t) (Timecode::BBT_Time::ticks_per_beat / bbt_beat_subdivision);
 
                        pos = (*i).frame + frame_skip;
                        accumulated_error = frame_skip_error;
 
                        tick = skip;
-                       
-                       for (t = 0; (tick < Meter::ticks_per_beat) && (n < bbt_nmarks) && (pos < next_beat_pos) ; pos += frame_skip, tick += skip, ++t) {
+
+                       for (t = 0; (tick < Timecode::BBT_Time::ticks_per_beat) && (n < bbt_nmarks) && (pos < next_beat_pos) ; pos += frame_skip, tick += skip, ++t) {
 
                                if (t % bbt_accent_modulo == (bbt_accent_modulo - 1)) {
                                        i_am_accented = true;
@@ -1359,7 +1465,7 @@ Editor::metric_get_bbt (GtkCustomRulerMark **marks, gdouble lower, gdouble /*upp
                                snprintf (buf, sizeof(buf), " ");
                                (*marks)[n].label = g_strdup (buf);
 
-                               /* Error compensation for float to nframes64_t*/
+                               /* Error compensation for float to framepos_t*/
                                accumulated_error += frame_skip_error;
                                if (accumulated_error > 1) {
                                        pos += 1;
@@ -1382,7 +1488,7 @@ Editor::metric_get_bbt (GtkCustomRulerMark **marks, gdouble lower, gdouble /*upp
 
        case bbt_show_ticks_detail:
 
-               beats = current_bbt_points->size();
+               beats = distance (begin, end);
                bbt_nmarks = (beats + 2) * bbt_beat_subdivision;
 
                bbt_position_of_helper = lower + (30 * Editor::get_current_zoom ());
@@ -1391,18 +1497,16 @@ Editor::metric_get_bbt (GtkCustomRulerMark **marks, gdouble lower, gdouble /*upp
                (*marks)[0].label = g_strdup(" ");
                (*marks)[0].position = lower;
                (*marks)[0].style = GtkCustomRulerMarkMicro;
-               
-               for (n = 1,   i = current_bbt_points->begin(); n < bbt_nmarks && i != current_bbt_points->end(); ++i) {
-                       if  ((*i).type != TempoMap::Beat) {
-                               continue;
-                       }
+
+               for (n = 1,   i = begin; n < bbt_nmarks && i != end; ++i) {
+
                        if ((*i).frame < lower && (bbt_bar_helper_on)) {
                                snprintf (buf, sizeof(buf), "<%" PRIu32 "|%" PRIu32, (*i).bar, (*i).beat);
-                               (*marks)[0].label = g_strdup (buf); 
+                               (*marks)[0].label = g_strdup (buf);
                                helper_active = true;
                        } else {
 
-                               if ((*i).beat == 1) {
+                               if ((*i).is_bar()) {
                                        (*marks)[n].style = GtkCustomRulerMarkMajor;
                                        snprintf (buf, sizeof(buf), "%" PRIu32, (*i).bar);
                                } else {
@@ -1416,33 +1520,33 @@ Editor::metric_get_bbt (GtkCustomRulerMark **marks, gdouble lower, gdouble /*upp
                                (*marks)[n].position = (*i).frame;
                                n++;
                        }
-                       
+
                        /* Add the tick marks */
 
                        /* Find the next beat */
 
                        next_beat.beats = (*i).beat;
                        next_beat.bars = (*i).bar;
-                       
-                       if ((*i).meter->beats_per_bar() > (next_beat.beats + 1)) {
+
+                       if ((*i).meter->divisions_per_bar() > (next_beat.beats + 1)) {
                                  next_beat.beats += 1;
                        } else {
                                  next_beat.bars += 1;
                                  next_beat.beats = 1;
                        }
-                               
-                       next_beat_pos = session->tempo_map().frame_time(next_beat);
-                       
-                       frame_skip = (nframes64_t) floor (frame_skip_error = (session->frame_rate() *  60) / (bbt_beat_subdivision * (*i).tempo->beats_per_minute()));
+
+                       next_beat_pos = _session->tempo_map().frame_time(next_beat);
+
+                       frame_skip = (framepos_t) floor (frame_skip_error = (_session->frame_rate() *  60) / (bbt_beat_subdivision * (*i).tempo->beats_per_minute()));
                        frame_skip_error -= frame_skip;
-                       skip = (uint32_t) (Meter::ticks_per_beat / bbt_beat_subdivision);
+                       skip = (uint32_t) (Timecode::BBT_Time::ticks_per_beat / bbt_beat_subdivision);
 
                        pos = (*i).frame + frame_skip;
                        accumulated_error = frame_skip_error;
 
                        tick = skip;
-                       
-                       for (t = 0; (tick < Meter::ticks_per_beat) && (n < bbt_nmarks) && (pos < next_beat_pos) ; pos += frame_skip, tick += skip, ++t) {
+
+                       for (t = 0; (tick < Timecode::BBT_Time::ticks_per_beat) && (n < bbt_nmarks) && (pos < next_beat_pos) ; pos += frame_skip, tick += skip, ++t) {
 
                                if (t % bbt_accent_modulo == (bbt_accent_modulo - 1)) {
                                        i_am_accented = true;
@@ -1456,7 +1560,7 @@ Editor::metric_get_bbt (GtkCustomRulerMark **marks, gdouble lower, gdouble /*upp
 
                                (*marks)[n].label = g_strdup (buf);
 
-                               /* Error compensation for float to nframes64_t*/
+                               /* Error compensation for float to framepos_t*/
                                accumulated_error += frame_skip_error;
                                if (accumulated_error > 1) {
                                        pos += 1;
@@ -1471,7 +1575,7 @@ Editor::metric_get_bbt (GtkCustomRulerMark **marks, gdouble lower, gdouble /*upp
                                        (*marks)[n].style = GtkCustomRulerMarkMicro;
                                }
                                i_am_accented = false;
-                               n++;    
+                               n++;
                        }
                }
 
@@ -1479,7 +1583,7 @@ Editor::metric_get_bbt (GtkCustomRulerMark **marks, gdouble lower, gdouble /*upp
 
        case bbt_show_ticks_super_detail:
 
-               beats = current_bbt_points->size();
+               beats = distance (begin, end);
                bbt_nmarks = (beats + 2) * bbt_beat_subdivision;
 
                bbt_position_of_helper = lower + (30 * Editor::get_current_zoom ());
@@ -1488,18 +1592,16 @@ Editor::metric_get_bbt (GtkCustomRulerMark **marks, gdouble lower, gdouble /*upp
                (*marks)[0].label = g_strdup(" ");
                (*marks)[0].position = lower;
                (*marks)[0].style = GtkCustomRulerMarkMicro;
-               
-               for (n = 1,   i = current_bbt_points->begin(); n < bbt_nmarks && i != current_bbt_points->end(); ++i) {
-                       if  ((*i).type != TempoMap::Beat) {
-                                 continue;
-                       }
+
+               for (n = 1,   i = begin; n < bbt_nmarks && i != end; ++i) {
+
                        if ((*i).frame < lower && (bbt_bar_helper_on)) {
                                  snprintf (buf, sizeof(buf), "<%" PRIu32 "|%" PRIu32, (*i).bar, (*i).beat);
-                                 (*marks)[0].label = g_strdup (buf); 
+                                 (*marks)[0].label = g_strdup (buf);
                                  helper_active = true;
                        } else {
 
-                                 if ((*i).beat == 1) {
+                                 if ((*i).is_bar()) {
                                          (*marks)[n].style = GtkCustomRulerMarkMajor;
                                          snprintf (buf, sizeof(buf), "%" PRIu32, (*i).bar);
                                  } else {
@@ -1513,33 +1615,33 @@ Editor::metric_get_bbt (GtkCustomRulerMark **marks, gdouble lower, gdouble /*upp
                                  (*marks)[n].position = (*i).frame;
                                  n++;
                        }
-                       
+
                        /* Add the tick marks */
 
                        /* Find the next beat */
 
                        next_beat.beats = (*i).beat;
                        next_beat.bars = (*i).bar;
-                       
-                       if ((*i).meter->beats_per_bar() > (next_beat.beats + 1)) {
+
+                       if ((*i).meter->divisions_per_bar() > (next_beat.beats + 1)) {
                                  next_beat.beats += 1;
                        } else {
                                  next_beat.bars += 1;
                                  next_beat.beats = 1;
                        }
-                               
-                       next_beat_pos = session->tempo_map().frame_time(next_beat);
-                       
-                       frame_skip = (nframes64_t) floor (frame_skip_error = (session->frame_rate() *  60) / (bbt_beat_subdivision * (*i).tempo->beats_per_minute()));
+
+                       next_beat_pos = _session->tempo_map().frame_time(next_beat);
+
+                       frame_skip = (framepos_t) floor (frame_skip_error = (_session->frame_rate() *  60) / (bbt_beat_subdivision * (*i).tempo->beats_per_minute()));
                        frame_skip_error -= frame_skip;
-                       skip = (uint32_t) (Meter::ticks_per_beat / bbt_beat_subdivision);
+                       skip = (uint32_t) (Timecode::BBT_Time::ticks_per_beat / bbt_beat_subdivision);
 
                        pos = (*i).frame + frame_skip;
                        accumulated_error = frame_skip_error;
 
                        tick = skip;
-                       
-                       for (t = 0; (tick < Meter::ticks_per_beat) && (n < bbt_nmarks) && (pos < next_beat_pos) ; pos += frame_skip, tick += skip, ++t) {
+
+                       for (t = 0; (tick < Timecode::BBT_Time::ticks_per_beat) && (n < bbt_nmarks) && (pos < next_beat_pos) ; pos += frame_skip, tick += skip, ++t) {
 
                                  if (t % bbt_accent_modulo == (bbt_accent_modulo - 1)) {
                                          i_am_accented = true;
@@ -1553,7 +1655,7 @@ Editor::metric_get_bbt (GtkCustomRulerMark **marks, gdouble lower, gdouble /*upp
 
                                  (*marks)[n].label = g_strdup (buf);
 
-                                 /* Error compensation for float to nframes64_t*/
+                                 /* Error compensation for float to framepos_t*/
                                  accumulated_error += frame_skip_error;
                                  if (accumulated_error > 1) {
                                          pos += 1;
@@ -1561,14 +1663,14 @@ Editor::metric_get_bbt (GtkCustomRulerMark **marks, gdouble lower, gdouble /*upp
                                  }
 
                                  (*marks)[n].position = pos;
-                                 
+
                                  if ((bbt_beat_subdivision > 4) && i_am_accented) {
                                          (*marks)[n].style = GtkCustomRulerMarkMinor;
                                  } else {
                                          (*marks)[n].style = GtkCustomRulerMarkMicro;
                                  }
                                  i_am_accented = false;
-                                 n++;  
+                                 n++;
                        }
                }
 
@@ -1588,8 +1690,8 @@ Editor::metric_get_bbt (GtkCustomRulerMark **marks, gdouble lower, gdouble /*upp
        case bbt_show_64:
                        bbt_nmarks = (gint) (bbt_bars / 64) + 1;
                        *marks = (GtkCustomRulerMark *) g_malloc (sizeof(GtkCustomRulerMark) * bbt_nmarks);
-                       for (n = 0,   i = current_bbt_points->begin(); i != current_bbt_points->end() && n < bbt_nmarks; i++) {
-                               if ((*i).type == TempoMap::Bar)  {
+                       for (n = 0,   i = begin; i != end && n < bbt_nmarks; i++) {
+                               if ((*i).is_bar()) {
                                        if ((*i).bar % 64 == 1) {
                                                if ((*i).bar % 256 == 1) {
                                                        snprintf (buf, sizeof(buf), "%" PRIu32, (*i).bar);
@@ -1613,8 +1715,8 @@ Editor::metric_get_bbt (GtkCustomRulerMark **marks, gdouble lower, gdouble /*upp
        case bbt_show_16:
                        bbt_nmarks = (bbt_bars / 16) + 1;
                *marks = (GtkCustomRulerMark *) g_malloc (sizeof(GtkCustomRulerMark) * bbt_nmarks);
-               for (n = 0,  i = current_bbt_points->begin(); i != current_bbt_points->end() && n < bbt_nmarks; i++) {
-                       if ((*i).type == TempoMap::Bar)  {
+               for (n = 0,  i = begin; i != end && n < bbt_nmarks; i++) {
+                       if ((*i).is_bar()) {
                          if ((*i).bar % 16 == 1) {
                                if ((*i).bar % 64 == 1) {
                                        snprintf (buf, sizeof(buf), "%" PRIu32, (*i).bar);
@@ -1638,8 +1740,8 @@ Editor::metric_get_bbt (GtkCustomRulerMark **marks, gdouble lower, gdouble /*upp
        case bbt_show_4:
                bbt_nmarks = (bbt_bars / 4) + 1;
                *marks = (GtkCustomRulerMark *) g_malloc (sizeof(GtkCustomRulerMark) * bbt_nmarks);
-               for (n = 0,   i = current_bbt_points->begin(); i != current_bbt_points->end() && n < bbt_nmarks; ++i) {
-                       if ((*i).type == TempoMap::Bar)  {
+               for (n = 0,   i = begin; i != end && n < bbt_nmarks; ++i) {
+                       if ((*i).is_bar()) {
                          if ((*i).bar % 4 == 1) {
                                if ((*i).bar % 16 == 1) {
                                        snprintf (buf, sizeof(buf), "%" PRIu32, (*i).bar);
@@ -1664,8 +1766,8 @@ Editor::metric_get_bbt (GtkCustomRulerMark **marks, gdouble lower, gdouble /*upp
   //   default:
                bbt_nmarks = bbt_bars + 2;
                *marks = (GtkCustomRulerMark *) g_malloc (sizeof(GtkCustomRulerMark) * bbt_nmarks );
-               for (n = 0,  i = current_bbt_points->begin(); i != current_bbt_points->end() && n < bbt_nmarks; i++) {
-                       if ((*i).type == TempoMap::Bar)  {
+               for (n = 0,  i = begin; i != end && n < bbt_nmarks; i++) {
+                       if ((*i).is_bar()) {
                          if ((*i).bar % 4 == 1) {
                                        snprintf (buf, sizeof(buf), "%" PRIu32, (*i).bar);
                                        (*marks)[n].style = GtkCustomRulerMarkMajor;
@@ -1682,63 +1784,61 @@ Editor::metric_get_bbt (GtkCustomRulerMark **marks, gdouble lower, gdouble /*upp
                        n++;
                        }
                }
+
        break;
 
        }
 
-       return n; //return the actual number of marks made, since we might have skipped some from fractional time signatures 
+       return n; //return the actual number of marks made, since we might have skipped some from fractional time signatures
+
+}
 
+void
+Editor::set_samples_ruler_scale (framepos_t lower, framepos_t upper)
+{
+       _samples_ruler_interval = (upper - lower) / 5;
 }
 
 gint
-Editor::metric_get_frames (GtkCustomRulerMark **marks, gdouble lower, gdouble upper, gint /*maxchars*/)
+Editor::metric_get_samples (GtkCustomRulerMark **marks, gdouble lower, gdouble /*upper*/, gint /*maxchars*/)
 {
-       nframes64_t mark_interval;
-       nframes64_t pos;
-       nframes64_t ilower = (nframes64_t) floor (lower);
-       nframes64_t iupper = (nframes64_t) floor (upper);
+       framepos_t pos;
+       framepos_t const ilower = (framepos_t) floor (lower);
        gchar buf[16];
        gint nmarks;
        gint n;
 
-       if (session == 0) {
+       if (_session == 0) {
                return 0;
        }
 
-       mark_interval = (iupper - ilower) / 5;
-       if (mark_interval > session->frame_rate()) {
-               mark_interval -= mark_interval % session->frame_rate();
-       } else {
-               mark_interval = session->frame_rate() / (session->frame_rate() / mark_interval ) ;
-       }
        nmarks = 5;
        *marks = (GtkCustomRulerMark *) g_malloc (sizeof(GtkCustomRulerMark) * nmarks);
-       for (n = 0, pos = ilower; n < nmarks; pos += mark_interval, ++n) {
+       for (n = 0, pos = ilower; n < nmarks; pos += _samples_ruler_interval, ++n) {
                snprintf (buf, sizeof(buf), "%" PRIi64, pos);
                (*marks)[n].label = g_strdup (buf);
                (*marks)[n].position = pos;
                (*marks)[n].style = GtkCustomRulerMarkMajor;
        }
-       
+
        return nmarks;
 }
 
 static void
-sample_to_clock_parts ( nframes64_t sample,
-                       nframes64_t sample_rate, 
+sample_to_clock_parts ( framepos_t sample,
+                       framepos_t sample_rate,
                        long *hrs_p,
                        long *mins_p,
                        long *secs_p,
                        long *millisecs_p)
 
 {
-       nframes64_t left;
+       framepos_t left;
        long hrs;
        long mins;
        long secs;
        long millisecs;
-       
+
        left = sample;
        hrs = left / (sample_rate * 60 * 60);
        left -= hrs * sample_rate * 60 * 60;
@@ -1757,26 +1857,25 @@ sample_to_clock_parts ( nframes64_t sample,
 }
 
 void
-Editor::set_minsec_ruler_scale (gdouble lower, gdouble upper)
+Editor::set_minsec_ruler_scale (framepos_t lower, framepos_t upper)
 {
-       nframes64_t range;
-       nframes64_t fr;
-       nframes64_t spacer;
+       framepos_t fr;
+       framepos_t spacer;
 
-       if (session == 0) {
+       if (_session == 0) {
                return;
        }
 
-       fr = session->frame_rate();
+       fr = _session->frame_rate();
 
        /* to prevent 'flashing' */
-       if (lower > (spacer = (nframes64_t)(128 * Editor::get_current_zoom ()))) {
+       if (lower > (spacer = (framepos_t)(128 * Editor::get_current_zoom ()))) {
                lower -= spacer;
        } else {
                lower = 0;
        }
        upper += spacer;
-       range = (nframes64_t) (upper - lower);
+       framecnt_t const range = upper - lower;
 
        if (range <  (fr / 50)) {
                minsec_mark_interval =  fr / 1000; /* show 1/1000 seconds */
@@ -1847,9 +1946,9 @@ Editor::set_minsec_ruler_scale (gdouble lower, gdouble upper)
                 minsec_ruler_scale = minsec_show_hours;
                minsec_mark_modulo = 2;
         } else {
-                                                                                                                   
-                /* not possible if nframes64_t is a 32 bit quantity */
-                                                                                                                   
+
+                /* not possible if framepos_t is a 32 bit quantity */
+
                 minsec_mark_interval = 4 * 60 * 60 * fr; /* show 4 hrs */
         }
        minsec_nmarks = 2 + (range / minsec_mark_interval);
@@ -1858,29 +1957,29 @@ Editor::set_minsec_ruler_scale (gdouble lower, gdouble upper)
 gint
 Editor::metric_get_minsec (GtkCustomRulerMark **marks, gdouble lower, gdouble /*upper*/, gint /*maxchars*/)
 {
-       nframes64_t pos;
-       nframes64_t spacer;
+       framepos_t pos;
+       framepos_t spacer;
        long hrs, mins, secs, millisecs;
        gchar buf[16];
        gint n;
 
-       if (session == 0) {
+       if (_session == 0) {
                return 0;
        }
 
        /* to prevent 'flashing' */
-       if (lower > (spacer = (nframes64_t)(128 * Editor::get_current_zoom ()))) {
+       if (lower > (spacer = (framepos_t) (128 * Editor::get_current_zoom ()))) {
                lower = lower - spacer;
        } else {
                lower = 0;
        }
 
        *marks = (GtkCustomRulerMark *) g_malloc (sizeof(GtkCustomRulerMark) * minsec_nmarks);
-       pos = ((((nframes64_t) floor(lower)) + (minsec_mark_interval/2))/minsec_mark_interval) * minsec_mark_interval;
+       pos = ((((framepos_t) floor(lower)) + (minsec_mark_interval/2))/minsec_mark_interval) * minsec_mark_interval;
        switch (minsec_ruler_scale) {
        case minsec_show_seconds:
                for (n = 0; n < minsec_nmarks; pos += minsec_mark_interval, ++n) {
-                       sample_to_clock_parts (pos, session->frame_rate(), &hrs, &mins, &secs, &millisecs);
+                       sample_to_clock_parts (pos, _session->frame_rate(), &hrs, &mins, &secs, &millisecs);
                        if (secs % minsec_mark_modulo == 0) {
                                if (secs == 0) {
                                        (*marks)[n].style = GtkCustomRulerMarkMajor;
@@ -1898,7 +1997,7 @@ Editor::metric_get_minsec (GtkCustomRulerMark **marks, gdouble lower, gdouble /*
          break;
        case minsec_show_minutes:
                for (n = 0; n < minsec_nmarks; pos += minsec_mark_interval, ++n) {
-                        sample_to_clock_parts (pos, session->frame_rate(), &hrs, &mins, &secs, &millisecs);
+                        sample_to_clock_parts (pos, _session->frame_rate(), &hrs, &mins, &secs, &millisecs);
                         if (mins % minsec_mark_modulo == 0) {
                                 if (mins == 0) {
                                         (*marks)[n].style = GtkCustomRulerMarkMajor;
@@ -1916,7 +2015,7 @@ Editor::metric_get_minsec (GtkCustomRulerMark **marks, gdouble lower, gdouble /*
          break;
        case minsec_show_hours:
                 for (n = 0; n < minsec_nmarks; pos += minsec_mark_interval, ++n) {
-                        sample_to_clock_parts (pos, session->frame_rate(), &hrs, &mins, &secs, &millisecs);
+                        sample_to_clock_parts (pos, _session->frame_rate(), &hrs, &mins, &secs, &millisecs);
                         if (hrs % minsec_mark_modulo == 0) {
                                 (*marks)[n].style = GtkCustomRulerMarkMajor;
                                 snprintf (buf, sizeof(buf), "%02ld:%02ld:%02ld.%03ld", hrs, mins, secs, millisecs);
@@ -1930,7 +2029,7 @@ Editor::metric_get_minsec (GtkCustomRulerMark **marks, gdouble lower, gdouble /*
              break;
        case minsec_show_frames:
                for (n = 0; n < minsec_nmarks; pos += minsec_mark_interval, ++n) {
-                       sample_to_clock_parts (pos, session->frame_rate(), &hrs, &mins, &secs, &millisecs);
+                       sample_to_clock_parts (pos, _session->frame_rate(), &hrs, &mins, &secs, &millisecs);
                        if (millisecs % minsec_mark_modulo == 0) {
                                if (secs == 0) {
                                        (*marks)[n].style = GtkCustomRulerMarkMajor;