Catch keyboard events on notes.
[ardour.git] / gtk2_ardour / editor.cc
index 462564cd77169255e6f0196183aa1ea82fdd3e8c..cd1b9e4b7c613e00bf2c90dc42e2ca3f69efdb2e 100644 (file)
@@ -1,5 +1,5 @@
 /*
-    Copyright (C) 2000-2006 Paul Davis 
+    Copyright (C) 2000-2007 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
     along with this program; if not, write to the Free Software
     Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 
-    $Id$
 */
 
+/* Note: public Editor methods are documented in public_editor.h */
+
 #include <unistd.h>
 #include <cstdlib>
 #include <cmath>
 
 #include <pbd/convert.h>
 #include <pbd/error.h>
+#include <pbd/enumwriter.h>
 #include <pbd/memento_command.h>
 
+#include <glibmm/miscutils.h>
 #include <gtkmm/image.h>
 #include <gdkmm/color.h>
 #include <gdkmm/bitmap.h>
 
+#include <gtkmm2ext/grouped_buttons.h>
 #include <gtkmm2ext/gtk_ui.h>
 #include <gtkmm2ext/tearoff.h>
 #include <gtkmm2ext/utils.h>
+#include <gtkmm2ext/window_title.h>
+#include <gtkmm2ext/choice.h>
 
 #include <ardour/audio_track.h>
 #include <ardour/audio_diskstream.h>
@@ -53,7 +59,6 @@
 
 #include "ardour_ui.h"
 #include "editor.h"
-#include "grouped_buttons.h"
 #include "keyboard.h"
 #include "marker.h"
 #include "playlist_selector.h"
@@ -68,7 +73,6 @@
 #include "editing.h"
 #include "public_editor.h"
 #include "crossfade_edit.h"
-#include "audio_time_axis.h"
 #include "canvas_impl.h"
 #include "actions.h"
 #include "gui_thread.h"
@@ -79,9 +83,9 @@
 
 #include "i18n.h"
 
-/* <CMT Additions> */
+#ifdef WITH_CMT
 #include "imageframe_socket_handler.h"
-/* </CMT Additions> */
+#endif
 
 using namespace std;
 using namespace sigc;
@@ -92,6 +96,7 @@ using namespace Glib;
 using namespace Gtkmm2ext;
 using namespace Editing;
 
+using PBD::internationalize;
 using PBD::atoi;
 
 const double Editor::timebar_height = 15.0;
@@ -132,8 +137,8 @@ static const gchar *_zoom_focus_strings[] = {
        N_("Left"),
        N_("Right"),
        N_("Center"),
-       N_("Playhead"),
-       N_("Edit Cursor"),
+       N_("Play"),
+       N_("Edit"),
        0
 };
 
@@ -147,6 +152,7 @@ Gdk::Cursor* Editor::zoom_cursor = 0;
 Gdk::Cursor* Editor::time_fx_cursor = 0;
 Gdk::Cursor* Editor::fader_cursor = 0;
 Gdk::Cursor* Editor::speaker_cursor = 0;
+Gdk::Cursor* Editor::note_cursor = 0;
 Gdk::Cursor* Editor::wait_cursor = 0;
 Gdk::Cursor* Editor::timebar_cursor = 0;
 
@@ -170,9 +176,8 @@ check_adjustment (Gtk::Adjustment* adj)
 
 }
 
-Editor::Editor (AudioEngine& eng) 
-       : engine (eng),
-
+Editor::Editor ()
+       : 
          /* time display buttons */
 
          minsec_label (_("Mins:Secs")),
@@ -196,21 +201,21 @@ Editor::Editor (AudioEngine& eng)
 
          /* tool bar related */
 
-         edit_cursor_clock (X_("EditCursorClock"), true),
-         zoom_range_clock (X_("ZoomRangeClock"), true, true),
+         edit_cursor_clock (X_("editcursor"), false, X_("EditCursorClock"), true),
+         zoom_range_clock (X_("zoomrange"), false, X_("ZoomRangeClock"), true, true),
          
          toolbar_selection_clock_table (2,3),
          
          automation_mode_button (_("mode")),
          global_automation_button (_("automation")),
 
-         /* <CMT Additions> */
+#ifdef WITH_CMT
          image_socket_listener(0),
-         /* </CMT Additions> */
+#endif
 
          /* nudge */
 
-         nudge_clock (X_("NudgeClock"), true, true)
+         nudge_clock (X_("nudge"), false, X_("NudgeClock"), true, true)
 
 {
        constructed = false;
@@ -230,8 +235,8 @@ Editor::Editor (AudioEngine& eng)
        selection->PointsChanged.connect (mem_fun(*this, &Editor::point_selection_changed));
 
        clicked_regionview = 0;
-       clicked_trackview = 0;
-       clicked_audio_trackview = 0;
+       clicked_axisview = 0;
+       clicked_routeview = 0;
        clicked_crossfadeview = 0;
        clicked_control_point = 0;
        latest_regionview = 0;
@@ -271,7 +276,6 @@ Editor::Editor (AudioEngine& eng)
        no_route_list_redisplay = false;
        verbose_cursor_on = true;
        route_removal = false;
-       track_spacing = 0;
        show_automatic_regions_in_region_list = true;
        region_list_sort_type = (Editing::RegionListSortType) 0; 
        have_pending_keyboard_selection = false;
@@ -283,6 +287,7 @@ Editor::Editor (AudioEngine& eng)
        route_list_menu = 0;
        region_list_menu = 0;
        marker_menu = 0;
+       start_end_marker_menu = 0;
        range_marker_menu = 0;
        marker_menu_item = 0;
        tm_marker_menu = 0;
@@ -290,10 +295,7 @@ Editor::Editor (AudioEngine& eng)
        new_transport_marker_menu = 0;
        editor_mixer_strip_width = Wide;
        show_editor_mixer_when_tracks_arrive = false;
-       repos_zoom_queued = false;
-       region_edit_menu_split_item = 0;
        temp_location = 0;
-       region_edit_menu_split_multichannel_item = 0;
        leftmost_frame = 0;
        ignore_mouse_mode_toggle = false;
        current_stepping_trackview = 0;
@@ -308,19 +310,21 @@ Editor::Editor (AudioEngine& eng)
        playhead_cursor = 0;
        button_release_can_deselect = true;
        canvas_idle_queued = false;
+       _dragging_playhead = false;
+       _dragging_hscrollbar = false;
 
-       location_marker_color = color_map[cLocationMarker];
-       location_range_color = color_map[cLocationRange];
-       location_cd_marker_color = color_map[cLocationCDMarker];
-       location_loop_color = color_map[cLocationLoop];
-       location_punch_color = color_map[cLocationPunch];
+       location_marker_color = ARDOUR_UI::config()->canvasvar_LocationMarker.get();
+       location_range_color = ARDOUR_UI::config()->canvasvar_LocationRange.get();
+       location_cd_marker_color = ARDOUR_UI::config()->canvasvar_LocationCDMarker.get();
+       location_loop_color = ARDOUR_UI::config()->canvasvar_LocationLoop.get();
+       location_punch_color = ARDOUR_UI::config()->canvasvar_LocationPunch.get();
 
        range_marker_drag_rect = 0;
        marker_drag_line = 0;
        
        set_mouse_mode (MouseObject, true);
 
-       frames_per_unit = 2048; /* too early to use set_frames_per_unit */
+       frames_per_unit = 2048; /* too early to use reset_zoom () */
        reset_hscrollbar_stepping ();
        
        zoom_focus = ZoomFocusLeft;
@@ -353,21 +357,24 @@ Editor::Editor (AudioEngine& eng)
        edit_vscrollbar.set_adjustment (vertical_adjustment);
        edit_hscrollbar.set_adjustment (horizontal_adjustment);
 
-       edit_hscrollbar.signal_button_press_event().connect (mem_fun(*this, &Editor::hscrollbar_button_press));
-       edit_hscrollbar.signal_button_release_event().connect (mem_fun(*this, &Editor::hscrollbar_button_release));
+       edit_hscrollbar.signal_button_press_event().connect (mem_fun(*this, &Editor::hscrollbar_button_press), false);
+       edit_hscrollbar.signal_button_release_event().connect (mem_fun(*this, &Editor::hscrollbar_button_release), false);
        edit_hscrollbar.signal_size_allocate().connect (mem_fun(*this, &Editor::hscrollbar_allocate));
 
+       edit_hscrollbar.set_name ("EditorHScrollbar");
+
        build_cursors ();
        setup_toolbar ();
 
        edit_cursor_clock.ValueChanged.connect (mem_fun(*this, &Editor::edit_cursor_clock_changed));
        
+       time_canvas_vbox.pack_start (*_ruler_separator, false, false);
        time_canvas_vbox.pack_start (*minsec_ruler, false, false);
        time_canvas_vbox.pack_start (*smpte_ruler, false, false);
        time_canvas_vbox.pack_start (*frames_ruler, false, false);
        time_canvas_vbox.pack_start (*bbt_ruler, false, false);
        time_canvas_vbox.pack_start (time_canvas, true, true);
-       time_canvas_vbox.set_size_request (-1, (int)(timebar_height * visible_timebars));
+       time_canvas_vbox.set_size_request (-1, (int)(timebar_height * visible_timebars) + 2);
 
        bbt_label.set_name ("EditorTimeButton");
        bbt_label.set_size_request (-1, (int)timebar_height);
@@ -420,6 +427,9 @@ Editor::Editor (AudioEngine& eng)
        time_button_event_box.set_name ("TimebarLabelBase");
        time_button_event_box.signal_button_release_event().connect (mem_fun(*this, &Editor::ruler_label_button_release));
 
+       time_button_frame.add(time_button_event_box);
+       time_button_frame.property_shadow_type() = Gtk::SHADOW_OUT;
+
        /* these enable us to have a dedicated window (for cursor setting, etc.) 
           for the canvas areas.
        */
@@ -435,14 +445,15 @@ Editor::Editor (AudioEngine& eng)
        edit_packer.set_border_width (0);
        edit_packer.set_name ("EditorWindow");
        
-       edit_packer.attach (edit_vscrollbar,         0, 1, 1, 3,    FILL,        FILL|EXPAND, 0, 0);
+       edit_packer.attach (edit_vscrollbar,         3, 4, 1, 2,    FILL,        FILL|EXPAND, 0, 0);
 
-       edit_packer.attach (time_button_event_box,   1, 2, 0, 1,    FILL,        FILL, 0, 0);
-       edit_packer.attach (time_canvas_event_box,   2, 3, 0, 1,    FILL|EXPAND, FILL, 0, 0);
+       edit_packer.attach (time_button_frame,       0, 2, 0, 1,    FILL,        FILL, 0, 0);
+       edit_packer.attach (time_canvas_event_box,   2, 4, 0, 1,    FILL|EXPAND, FILL, 0, 0);
 
        edit_packer.attach (controls_layout,         1, 2, 1, 2,    FILL,        FILL|EXPAND, 0, 0);
        edit_packer.attach (track_canvas_event_box,  2, 3, 1, 2,    FILL|EXPAND, FILL|EXPAND, 0, 0);
 
+       edit_packer.attach (zoom_box,                1, 2, 2, 3,    FILL,         FILL, 0, 0);
        edit_packer.attach (edit_hscrollbar,         2, 3, 2, 3,    FILL|EXPAND,  FILL, 0, 0);
 
        bottom_hbox.set_border_width (2);
@@ -450,7 +461,7 @@ Editor::Editor (AudioEngine& eng)
 
        route_display_model = ListStore::create(route_display_columns);
        route_list_display.set_model (route_display_model);
-       route_list_display.append_column (_("Visible"), route_display_columns.visible);
+       route_list_display.append_column (_("Show"), route_display_columns.visible);
        route_list_display.append_column (_("Name"), route_display_columns.text);
        route_list_display.get_column (0)->set_data (X_("colnum"), GUINT_TO_POINTER(0));
        route_list_display.get_column (1)->set_data (X_("colnum"), GUINT_TO_POINTER(1));
@@ -476,7 +487,7 @@ Editor::Editor (AudioEngine& eng)
        edit_group_display.set_model (group_model);
        edit_group_display.append_column (_("Name"), group_columns.text);
        edit_group_display.append_column (_("Active"), group_columns.is_active);
-       edit_group_display.append_column (_("Visible"), group_columns.is_visible);
+       edit_group_display.append_column (_("Show"), group_columns.is_visible);
        edit_group_display.get_column (0)->set_data (X_("colnum"), GUINT_TO_POINTER(0));
        edit_group_display.get_column (1)->set_data (X_("colnum"), GUINT_TO_POINTER(1));
        edit_group_display.get_column (2)->set_data (X_("colnum"), GUINT_TO_POINTER(2));
@@ -501,12 +512,11 @@ Editor::Editor (AudioEngine& eng)
        active_cell->property_activatable() = true;
        active_cell->property_radio() = false;
 
-       edit_group_display.set_name ("EditGroupList");
-
        group_model->signal_row_changed().connect (mem_fun (*this, &Editor::edit_group_row_change));
 
        edit_group_display.set_name ("EditGroupList");
        edit_group_display.get_selection()->set_mode (SELECTION_SINGLE);
+       edit_group_display.set_headers_visible (true);
        edit_group_display.set_reorderable (false);
        edit_group_display.set_rules_hint (true);
        edit_group_display.set_size_request (75, -1);
@@ -592,11 +602,12 @@ Editor::Editor (AudioEngine& eng)
        named_selection_display.append_column (_("Chunks"), named_selection_columns.text);
        named_selection_display.set_headers_visible (false);
        named_selection_display.set_size_request (100, -1);
-       named_selection_display.set_name ("RegionListDisplay");
+       named_selection_display.set_name ("NamedSelectionDisplay");
        
        named_selection_display.get_selection()->set_mode (SELECTION_SINGLE);
        named_selection_display.set_size_request (100, -1);
-       named_selection_display.signal_button_press_event().connect (mem_fun(*this, &Editor::named_selection_display_button_press), false);
+       named_selection_display.signal_button_release_event().connect (mem_fun(*this, &Editor::named_selection_display_button_release), false);
+       named_selection_display.signal_key_release_event().connect (mem_fun(*this, &Editor::named_selection_display_key_release), false);
        named_selection_display.get_selection()->signal_changed().connect (mem_fun (*this, &Editor::named_selection_display_selection_changed));
 
        /* SNAPSHOTS */
@@ -604,7 +615,7 @@ Editor::Editor (AudioEngine& eng)
        snapshot_display_model = ListStore::create (snapshot_display_columns);
        snapshot_display.set_model (snapshot_display_model);
        snapshot_display.append_column (X_("snapshot"), snapshot_display_columns.visible_name);
-       snapshot_display.set_name ("SnapshotDisplayList");
+       snapshot_display.set_name ("SnapshotDisplay");
        snapshot_display.set_size_request (75, -1);
        snapshot_display.set_headers_visible (false);
        snapshot_display.set_reorderable (false);
@@ -618,10 +629,10 @@ Editor::Editor (AudioEngine& eng)
 
        nlabel = manage (new Label (_("Regions")));
        nlabel->set_angle (-90);
-               the_notebook.append_page (region_list_scroller, *nlabel);
+       the_notebook.append_page (region_list_scroller, *nlabel);
        nlabel = manage (new Label (_("Tracks/Busses")));
        nlabel->set_angle (-90);
-               the_notebook.append_page (route_list_scroller, *nlabel);
+       the_notebook.append_page (route_list_scroller, *nlabel);
        nlabel = manage (new Label (_("Snapshots")));
        nlabel->set_angle (-90);
        the_notebook.append_page (snapshot_display_scroller, *nlabel);
@@ -684,8 +695,32 @@ Editor::Editor (AudioEngine& eng)
 
        fade_context_menu.set_name ("ArdourContextMenu");
 
-       set_title (_("ardour: editor"));
-       set_wmclass (_("ardour_editor"), "Ardour");
+       /* icons, titles, WM stuff */
+
+       list<Glib::RefPtr<Gdk::Pixbuf> > window_icons;
+       Glib::RefPtr<Gdk::Pixbuf> icon;
+
+       if ((icon = ::get_icon ("ardour_icon_16px")) != 0) {
+               window_icons.push_back (icon);
+       }
+       if ((icon = ::get_icon ("ardour_icon_22px")) != 0) {
+               window_icons.push_back (icon);
+       }
+       if ((icon = ::get_icon ("ardour_icon_32px")) != 0) {
+               window_icons.push_back (icon);
+       }
+       if ((icon = ::get_icon ("ardour_icon_48px")) != 0) {
+               window_icons.push_back (icon);
+       }
+       if (!window_icons.empty()) {
+               set_icon_list (window_icons);
+               set_default_icon_list (window_icons);
+       }
+
+       WindowTitle title(Glib::get_application_name());
+       title += _("Editor");
+       set_title (title.get_string());
+       set_wmclass (X_("ardour_editor"), "Ardour");
 
        add (vpacker);
        add_events (Gdk::KEY_PRESS_MASK|Gdk::KEY_RELEASE_MASK);
@@ -708,7 +743,7 @@ Editor::Editor (AudioEngine& eng)
 
 Editor::~Editor()
 {
-       /* <CMT Additions> */
+#ifdef WITH_CMT
        if(image_socket_listener)
        {
                if(image_socket_listener->is_connected())
@@ -719,7 +754,7 @@ Editor::~Editor()
                delete image_socket_listener ;
                image_socket_listener = 0 ;
        }
-       /* </CMT Additions> */
+#endif
 }
 
 void
@@ -778,6 +813,9 @@ Editor::show_window ()
 {
        show_all ();
        present ();
+       
+       /* re-hide editor list if necessary */
+       editor_list_button_toggled ();
 
        /* now reset all audio_time_axis heights, because widgets might need
           to be re-hidden
@@ -800,65 +838,6 @@ Editor::tie_vertical_scrolling ()
        edit_cursor->set_y_axis(y1);
 }
 
-void
-Editor::set_frames_per_unit (double fpu)
-{
-       nframes_t frames;
-
-       if (fpu == frames_per_unit) {
-               return;
-       }
-
-       if (fpu < 2.0) {
-               fpu = 2.0;
-       }
-
-       // convert fpu to frame count
-
-       frames = (nframes_t) floor (fpu * canvas_width);
-       
-       /* don't allow zooms that fit more than the maximum number
-          of frames into an 800 pixel wide space.
-       */
-
-       if (max_frames / fpu < 800.0) {
-               return;
-       }
-
-       if (fpu == frames_per_unit) {
-               return;
-       }
-
-       frames_per_unit = fpu;
-
-       if (frames != zoom_range_clock.current_duration()) {
-               zoom_range_clock.set (frames);
-       }
-
-       if (mouse_mode == MouseRange && selection->time.start () != selection->time.end_frame ()) {
-               if (!selection->tracks.empty()) {
-                       for (TrackSelection::iterator i = selection->tracks.begin(); i != selection->tracks.end(); ++i) {
-                               (*i)->reshow_selection (selection->time);
-                       }
-               } else {
-                       for (TrackViewList::iterator i = track_views.begin(); i != track_views.end(); ++i) {
-                               (*i)->reshow_selection (selection->time);
-                       }
-               }
-       }
-
-       ZoomChanged (); /* EMIT_SIGNAL */
-
-       reset_hscrollbar_stepping ();
-       reset_scrolling_region ();
-       
-       if (edit_cursor) edit_cursor->set_position (edit_cursor->current_frame);
-       if (playhead_cursor) playhead_cursor->set_position (playhead_cursor->current_frame);
-
-       instant_save ();
-
-}
-
 void
 Editor::instant_save ()
 {
@@ -867,29 +846,9 @@ Editor::instant_save ()
        }
 
        if (session) {
-               session->add_instant_xml(get_state(), session->path());
-       } else {
-               Config->add_instant_xml(get_state(), get_user_ardour_path());
-       }
-}
-
-void
-Editor::reposition_x_origin (nframes_t frame)
-{
-       if (frame != leftmost_frame) {
-               leftmost_frame = frame;
-               
-               nframes_t rightmost_frame = leftmost_frame + current_page_frames ();
-
-               if (rightmost_frame > last_canvas_frame) {
-                       last_canvas_frame = rightmost_frame;
-                       reset_scrolling_region ();
-               }
-
-               horizontal_adjustment.set_value (frame/frames_per_unit);
+               session->add_instant_xml(get_state());
        } else {
-               update_fixed_rulers();
-               tempo_map_changed (Change (0));
+               Config->add_instant_xml(get_state());
        }
 }
 
@@ -948,9 +907,9 @@ Editor::control_scroll (float fraction)
 
        if (target > (current_page_frames() / 2)) {
                /* try to center PH in window */
-               reposition_x_origin (target - (current_page_frames()/2));
+               reset_x_origin (target - (current_page_frames()/2));
        } else {
-               reposition_x_origin (0);
+               reset_x_origin (0);
        }
 
        /* cancel the existing */
@@ -969,36 +928,6 @@ Editor::deferred_control_scroll (nframes_t target)
        return false;
 }
 
-void 
-Editor::canvas_horizontally_scrolled ()
-{
-
-       leftmost_frame = (nframes_t) floor (horizontal_adjustment.get_value() * frames_per_unit);
-       update_fixed_rulers ();
-       tempo_map_changed (Change (0));
-
-}
-
-void
-Editor::reposition_and_zoom (nframes_t frame, double nfpu)
-{
-       if (!repos_zoom_queued) {
-               repos_zoom_queued = true;
-               Glib::signal_idle().connect (bind (mem_fun(*this, &Editor::deferred_reposition_and_zoom), frame, nfpu));
-       }
-}
-
-gint
-Editor::deferred_reposition_and_zoom (nframes_t frame, double nfpu)
-{
-
-       set_frames_per_unit (nfpu);
-       reposition_x_origin  (frame);
-       repos_zoom_queued = false;
-       
-       return FALSE;
-}
-
 void
 Editor::on_realize ()
 {
@@ -1056,7 +985,7 @@ Editor::center_screen_internal (nframes_t frame, float page)
                frame = 0;
        }
 
-    reposition_x_origin (frame);
+       reset_x_origin (frame);
 }
 
 void
@@ -1068,6 +997,7 @@ Editor::handle_new_duration ()
                                  
        if (new_end > last_canvas_frame) {
                last_canvas_frame = new_end;
+               horizontal_adjustment.set_upper (last_canvas_frame / frames_per_unit);
                reset_scrolling_region ();
        }
 
@@ -1090,24 +1020,21 @@ Editor::update_title ()
        if (session) {
                bool dirty = session->dirty();
 
-               string wintitle = _("ardour: editor: ");
-
-               if (dirty) {
-                       wintitle += '[';
-               }
-
-               wintitle += session->name();
+               string session_name;
 
                if (session->snap_name() != session->name()) {
-                       wintitle += ':';
-                       wintitle += session->snap_name();
+                       session_name = session->snap_name();
+               } else {
+                       session_name = session->name();
                }
 
                if (dirty) {
-                       wintitle += ']';
+                       session_name = "*" + session_name;
                }
 
-               set_title (wintitle);
+               WindowTitle title(session_name);
+               title += Glib::get_application_name();
+               set_title (title.get_string());
        }
 }
 
@@ -1116,6 +1043,13 @@ Editor::connect_to_session (Session *t)
 {
        session = t;
 
+       XMLNode* node = ARDOUR_UI::instance()->editor_settings();
+       set_state (*node);
+
+       /* catch up with the playhead */
+
+       session->request_locate (playhead_cursor->current_frame);
+
        if (first_action_message) {
                first_action_message->hide();
        }
@@ -1133,8 +1067,8 @@ Editor::connect_to_session (Session *t)
        session_connections.push_back (session->TransportStateChange.connect (mem_fun(*this, &Editor::map_transport_state)));
        session_connections.push_back (session->PositionChanged.connect (mem_fun(*this, &Editor::map_position_change)));
        session_connections.push_back (session->RouteAdded.connect (mem_fun(*this, &Editor::handle_new_route)));
-       session_connections.push_back (session->AudioRegionAdded.connect (mem_fun(*this, &Editor::handle_new_audio_region)));
-       session_connections.push_back (session->AudioRegionRemoved.connect (mem_fun(*this, &Editor::handle_audio_region_removed)));
+       session_connections.push_back (session->RegionAdded.connect (mem_fun(*this, &Editor::handle_new_region)));
+       session_connections.push_back (session->RegionRemoved.connect (mem_fun(*this, &Editor::handle_region_removed)));
        session_connections.push_back (session->DurationChanged.connect (mem_fun(*this, &Editor::handle_new_duration)));
        session_connections.push_back (session->edit_group_added.connect (mem_fun(*this, &Editor::add_edit_group)));
        session_connections.push_back (session->edit_group_removed.connect (mem_fun(*this, &Editor::edit_groups_changed)));
@@ -1169,8 +1103,7 @@ Editor::connect_to_session (Session *t)
                }
                session->locations()->add (loc, false);
                session->set_auto_loop_location (loc);
-       }
-       else {
+       } else {
                // force name
                loc->set_name (_("Loop"));
        }
@@ -1183,8 +1116,7 @@ Editor::connect_to_session (Session *t)
                }
                session->locations()->add (loc, false);
                session->set_auto_punch_location (loc);
-       }
-       else {
+       } else {
                // force name
                loc->set_name (_("Punch"));
        }
@@ -1212,42 +1144,27 @@ Editor::connect_to_session (Session *t)
                (static_cast<TimeAxisView*>(*i))->set_samples_per_unit (frames_per_unit);
        }
 
-       /* ::reposition_x_origin() doesn't work right here, since the old
-          position may be zero already, and it does nothing in such
-          circumstances.
-       */
-
-       leftmost_frame = 0;
-       
-       horizontal_adjustment.set_value (0);
-
        restore_ruler_visibility ();
        //tempo_map_changed (Change (0));
        session->tempo_map().apply_with_metrics (*this, &Editor::draw_metric_marks);
 
-       edit_cursor->set_position (0);
-       playhead_cursor->set_position (0);
-
        start_scrolling ();
 
-       XMLNode* node = ARDOUR_UI::instance()->editor_settings();
-       set_state (*node);
-
        /* don't show master bus in a new session */
 
        if (ARDOUR_UI::instance()->session_is_new ()) {
 
-               TreeModel::Children rows = route_display_model->children();
+               TreeModel::Children rows = route_display_model->children();
                TreeModel::Children::iterator i;
        
                no_route_list_redisplay = true;
                
                for (i = rows.begin(); i != rows.end(); ++i) {
                        TimeAxisView *tv =  (*i)[route_display_columns.tv];
-                       AudioTimeAxisView *atv;
+                       RouteTimeAxisView *rtv;
                        
-                       if ((atv = dynamic_cast<AudioTimeAxisView*>(tv)) != 0) {
-                               if (atv->route()->master()) {
+                       if ((rtv = dynamic_cast<RouteTimeAxisView*>(tv)) != 0) {
+                               if (rtv->route()->is_master()) {
                                        route_list_display.get_selection()->unselect (i);
                                }
                        }
@@ -1257,9 +1174,9 @@ Editor::connect_to_session (Session *t)
                redisplay_route_list ();
        }
 
-        /* register for undo history */
+       /* register for undo history */
 
-        session->register_with_memento_command_factory(_id, this);
+       session->register_with_memento_command_factory(_id, this);
 }
 
 void
@@ -1294,7 +1211,7 @@ Editor::build_cursors ()
                mask = Bitmap::create (speaker_cursor_mask_bits, speaker_cursor_width, speaker_cursor_height);
                speaker_cursor = new Gdk::Cursor (source, mask, ffg, fbg, speaker_cursor_x_hot, speaker_cursor_y_hot);
        }
-
+       
        grabber_cursor = new Gdk::Cursor (HAND2);
        cross_hair_cursor = new Gdk::Cursor (CROSSHAIR);
        trimmer_cursor =  new Gdk::Cursor (SB_H_DOUBLE_ARROW);
@@ -1302,8 +1219,10 @@ Editor::build_cursors ()
        time_fx_cursor = new Gdk::Cursor (SIZING);
        wait_cursor = new Gdk::Cursor  (WATCH);
        timebar_cursor = new Gdk::Cursor(LEFT_PTR);
+       note_cursor = new Gdk::Cursor (PENCIL);
 }
 
+/** Pop up a context menu for when the user clicks on a fade in or fade out */
 void
 Editor::popup_fade_context_menu (int button, int32_t time, ArdourCanvas::Item* item, ItemType item_type)
 {
@@ -1323,35 +1242,35 @@ Editor::popup_fade_context_menu (int button, int32_t time, ArdourCanvas::Item* i
        case FadeInItem:
        case FadeInHandleItem:
                if (arv->audio_region()->fade_in_active()) {
-                       items.push_back (MenuElem (_("Deactivate"), bind (mem_fun (*arv, &AudioRegionView::set_fade_in_active), false)));
+                       items.push_back (MenuElem (_("Deactivate"), bind (mem_fun (*this, &Editor::set_fade_in_active), false)));
                } else {
-                       items.push_back (MenuElem (_("Activate"), bind (mem_fun (*arv, &AudioRegionView::set_fade_in_active), true)));
+                       items.push_back (MenuElem (_("Activate"), bind (mem_fun (*this, &Editor::set_fade_in_active), true)));
                }
                
                items.push_back (SeparatorElem());
                
-               items.push_back (MenuElem (_("Linear"), bind (mem_fun (*arv, &AudioRegionView::set_fade_in_shape), AudioRegion::Linear)));
-               items.push_back (MenuElem (_("Slowest"), bind (mem_fun (*arv, &AudioRegionView::set_fade_in_shape), AudioRegion::LogB)));
-               items.push_back (MenuElem (_("Slow"), bind (mem_fun (*arv, &AudioRegionView::set_fade_in_shape), AudioRegion::Fast)));
-               items.push_back (MenuElem (_("Fast"), bind (mem_fun (*arv, &AudioRegionView::set_fade_in_shape), AudioRegion::LogA)));
-               items.push_back (MenuElem (_("Fastest"), bind (mem_fun (*arv, &AudioRegionView::set_fade_in_shape), AudioRegion::Slow)));
+               items.push_back (MenuElem (_("Linear"), bind (mem_fun (*this, &Editor::set_fade_in_shape), AudioRegion::Linear)));
+               items.push_back (MenuElem (_("Slowest"), bind (mem_fun (*this, &Editor::set_fade_in_shape), AudioRegion::Fast)));
+               items.push_back (MenuElem (_("Slow"), bind (mem_fun (*this, &Editor::set_fade_in_shape), AudioRegion::LogB)));
+               items.push_back (MenuElem (_("Fast"), bind (mem_fun (*this, &Editor::set_fade_in_shape), AudioRegion::LogA)));
+               items.push_back (MenuElem (_("Fastest"), bind (mem_fun (*this, &Editor::set_fade_in_shape), AudioRegion::Slow)));
                break;
 
        case FadeOutItem:
        case FadeOutHandleItem:
                if (arv->audio_region()->fade_out_active()) {
-                       items.push_back (MenuElem (_("Deactivate"), bind (mem_fun (*arv, &AudioRegionView::set_fade_out_active), false)));
+                       items.push_back (MenuElem (_("Deactivate"), bind (mem_fun (*this, &Editor::set_fade_out_active), false)));
                } else {
-                       items.push_back (MenuElem (_("Activate"), bind (mem_fun (*arv, &AudioRegionView::set_fade_out_active), true)));
+                       items.push_back (MenuElem (_("Activate"), bind (mem_fun (*this, &Editor::set_fade_out_active), true)));
                }
                
                items.push_back (SeparatorElem());
                
-               items.push_back (MenuElem (_("Linear"), bind (mem_fun (*arv, &AudioRegionView::set_fade_out_shape), AudioRegion::Linear)));
-               items.push_back (MenuElem (_("Slowest"), bind (mem_fun (*arv, &AudioRegionView::set_fade_out_shape), AudioRegion::Fast)));
-               items.push_back (MenuElem (_("Slow"), bind (mem_fun (*arv, &AudioRegionView::set_fade_out_shape), AudioRegion::LogB)));
-               items.push_back (MenuElem (_("Fast"), bind (mem_fun (*arv, &AudioRegionView::set_fade_out_shape), AudioRegion::LogA)));
-               items.push_back (MenuElem (_("Fastest"), bind (mem_fun (*arv, &AudioRegionView::set_fade_out_shape), AudioRegion::Slow)));
+               items.push_back (MenuElem (_("Linear"), bind (mem_fun (*this, &Editor::set_fade_out_shape), AudioRegion::Linear)));
+               items.push_back (MenuElem (_("Slowest"), bind (mem_fun (*this, &Editor::set_fade_out_shape), AudioRegion::Slow)));
+               items.push_back (MenuElem (_("Slow"), bind (mem_fun (*this, &Editor::set_fade_out_shape), AudioRegion::LogA)));
+               items.push_back (MenuElem (_("Fast"), bind (mem_fun (*this, &Editor::set_fade_out_shape), AudioRegion::LogB)));
+               items.push_back (MenuElem (_("Fastest"), bind (mem_fun (*this, &Editor::set_fade_out_shape), AudioRegion::Fast)));
 
                break;
 
@@ -1365,191 +1284,38 @@ Editor::popup_fade_context_menu (int button, int32_t time, ArdourCanvas::Item* i
        fade_context_menu.popup (button, time);
 }
 
+/* Pop up the general track context menu for when the user clicks pretty much anywhere in a track or bus */
 void
-Editor::popup_track_context_menu (int button, int32_t time, ItemType item_type, bool with_selection, nframes_t frame)
-{
-       using namespace Menu_Helpers;
-       Menu* (Editor::*build_menu_function)(nframes_t);
-       Menu *menu;
-
-       switch (item_type) {
-       case RegionItem:
-       case RegionViewName:
-       case RegionViewNameHighlight:
-               if (with_selection) {
-                       build_menu_function = &Editor::build_track_selection_context_menu;
-               } else {
-                       build_menu_function = &Editor::build_track_region_context_menu;
-               }
-               break;
-
-       case SelectionItem:
-               if (with_selection) {
-                       build_menu_function = &Editor::build_track_selection_context_menu;
-               } else {
-                       build_menu_function = &Editor::build_track_context_menu;
-               }
-               break;
-
-       case CrossfadeViewItem:
-               build_menu_function = &Editor::build_track_crossfade_context_menu;
-               break;
-
-       case StreamItem:
-               if (clicked_audio_trackview->get_diskstream()) {
-                       build_menu_function = &Editor::build_track_context_menu;
-               } else {
-                       build_menu_function = &Editor::build_track_bus_context_menu;
-               }
-               break;
-
-       default:
-               /* probably shouldn't happen but if it does, we don't care */
-               return;
-       }
-
-       menu = (this->*build_menu_function)(frame);
-       menu->set_name ("ArdourContextMenu");
-       
-       /* now handle specific situations */
-
-       switch (item_type) {
-       case RegionItem:
-       case RegionViewName:
-       case RegionViewNameHighlight:
-               if (!with_selection) {
-                       if (region_edit_menu_split_item) {
-                               if (clicked_regionview && clicked_regionview->region()->covers (edit_cursor->current_frame)) {
-                                       ActionManager::set_sensitive (ActionManager::edit_cursor_in_region_sensitive_actions, true);
-                               } else {
-                                       ActionManager::set_sensitive (ActionManager::edit_cursor_in_region_sensitive_actions, false);
-                               }
-                       }
-                       /*
-                       if (region_edit_menu_split_multichannel_item) {
-                               if (clicked_regionview && clicked_regionview->region().n_channels() > 1) {
-                                       // GTK2FIX find the action, change its sensitivity
-                                       // region_edit_menu_split_multichannel_item->set_sensitive (true);
-                               } else {
-                                       // GTK2FIX see above
-                                       // region_edit_menu_split_multichannel_item->set_sensitive (false);
-                               }
-                       }*/
-               }
-               break;
-
-       case SelectionItem:
-               break;
-
-       case CrossfadeViewItem:
-               break;
-
-       case StreamItem:
-               break;
-
-       default:
-               /* probably shouldn't happen but if it does, we don't care */
-               return;
-       }
-
-       if (clicked_audio_trackview && clicked_audio_trackview->audio_track()) {
-
-               /* Bounce to disk */
-               
-               using namespace Menu_Helpers;
-               MenuList& edit_items  = menu->items();
-               
-               edit_items.push_back (SeparatorElem());
-
-               switch (clicked_audio_trackview->audio_track()->freeze_state()) {
-               case AudioTrack::NoFreeze:
-                       edit_items.push_back (MenuElem (_("Freeze"), mem_fun(*this, &Editor::freeze_route)));
-                       break;
-
-               case AudioTrack::Frozen:
-                       edit_items.push_back (MenuElem (_("Unfreeze"), mem_fun(*this, &Editor::unfreeze_route)));
-                       break;
-                       
-               case AudioTrack::UnFrozen:
-                       edit_items.push_back (MenuElem (_("Freeze"), mem_fun(*this, &Editor::freeze_route)));
-                       break;
-               }
-
-       }
-
-       menu->popup (button, time);
-}
-
-Menu*
-Editor::build_track_context_menu (nframes_t ignored)
+Editor::popup_track_context_menu (int button, int32_t time, nframes_t frame)
 {
-       using namespace Menu_Helpers;
-
-       MenuList& edit_items = track_context_menu.items();
-       edit_items.clear();
-
-       add_dstream_context_items (edit_items);
-       return &track_context_menu;
+       build_track_context_menu (frame)->popup (button, time);
 }
 
 Menu*
-Editor::build_track_bus_context_menu (nframes_t ignored)
+Editor::build_track_context_menu (nframes_t frame)
 {
        using namespace Menu_Helpers;
 
-       MenuList& edit_items = track_context_menu.items();
+       Menu* menu = manage (new Menu);
+       MenuList& edit_items = menu->items();
        edit_items.clear();
 
-       add_bus_context_items (edit_items);
-       return &track_context_menu;
-}
-
-Menu*
-Editor::build_track_region_context_menu (nframes_t frame)
-{
-       using namespace Menu_Helpers;
-       MenuList& edit_items  = track_region_context_menu.items();
-       edit_items.clear();
-
-       AudioTimeAxisView* atv = dynamic_cast<AudioTimeAxisView*> (clicked_trackview);
-
-       if (atv) {
-               boost::shared_ptr<Diskstream> ds;
-               Playlist* pl;
-               
-               if ((ds = atv->get_diskstream()) && ((pl = ds->playlist()))) {
-                       Playlist::RegionList* regions = pl->regions_at ((nframes_t) floor ( (double)frame * ds->speed()));
-                       for (Playlist::RegionList::iterator i = regions->begin(); i != regions->end(); ++i) {
-                               add_region_context_items (atv->audio_view(), (*i), edit_items);
-                       }
-                       delete regions;
-               }
-       }
-
-       add_dstream_context_items (edit_items);
-
-       return &track_region_context_menu;
-}
-
-Menu*
-Editor::build_track_crossfade_context_menu (nframes_t frame)
-{
-       using namespace Menu_Helpers;
-       MenuList& edit_items  = track_crossfade_context_menu.items();
-       edit_items.clear ();
+       /* Build the general `track' context menu, adding what is appropriate given
+          the current selection */
 
-       AudioTimeAxisView* atv = dynamic_cast<AudioTimeAxisView*> (clicked_trackview);
+       /* XXX: currently crossfades can't be selected, so we can't use the selection
+          to decide which crossfades to mention in the menu.  I believe this will
+          change at some point.  For now we have to use clicked_trackview to decide. */
+       AudioTimeAxisView* atv = dynamic_cast<AudioTimeAxisView*> (clicked_axisview);
 
        if (atv) {
                boost::shared_ptr<Diskstream> ds;
-               Playlist* pl;
-               AudioPlaylist* apl;
+               boost::shared_ptr<Playlist> pl;
+               boost::shared_ptr<AudioPlaylist> apl;
 
-               if ((ds = atv->get_diskstream()) && ((pl = ds->playlist()) != 0) && ((apl = dynamic_cast<AudioPlaylist*> (pl)) != 0)) {
+               if ((ds = atv->get_diskstream()) && ((pl = ds->playlist()) != 0) && ((apl = boost::dynamic_pointer_cast<AudioPlaylist> (pl)) != 0)) {
 
-                       Playlist::RegionList* regions = pl->regions_at (frame);
                        AudioPlaylist::Crossfades xfades;
-
                        apl->crossfades_at (frame, xfades);
 
                        bool many = xfades.size() > 1;
@@ -1557,18 +1323,24 @@ Editor::build_track_crossfade_context_menu (nframes_t frame)
                        for (AudioPlaylist::Crossfades::iterator i = xfades.begin(); i != xfades.end(); ++i) {
                                add_crossfade_context_items (atv->audio_view(), (*i), edit_items, many);
                        }
+               }
+       }       
 
-                       for (Playlist::RegionList::iterator i = regions->begin(); i != regions->end(); ++i) {
-                               add_region_context_items (atv->audio_view(), (*i), edit_items);
-                       }
+       if (!selection->time.empty()) {
+               add_selection_context_items (edit_items);
+       }
 
-                       delete regions;
-               }
+       if (!selection->regions.empty()) {
+               add_region_context_items (edit_items);
        }
 
-       add_dstream_context_items (edit_items);
+       if (!selection->tracks.empty()) {
+               add_bus_or_audio_track_context_items (edit_items);
+       }
+       
+       menu->set_name ("ArdourContextMenu");
 
-       return &track_crossfade_context_menu;
+       return menu;
 }
 
 #ifdef FFT_ANALYSIS
@@ -1610,22 +1382,11 @@ Editor::analyze_range_selection()
 #endif /* FFT_ANALYSIS */
 
 
-
-Menu*
-Editor::build_track_selection_context_menu (nframes_t ignored)
-{
-       using namespace Menu_Helpers;
-       MenuList& edit_items  = track_selection_context_menu.items();
-       edit_items.clear ();
-
-       add_selection_context_items (edit_items);
-       add_dstream_context_items (edit_items);
-
-       return &track_selection_context_menu;
-}
-
+/** Add context menu items relevant to crossfades.
+ * @param edit_items List to add the items to.
+ */
 void
-Editor::add_crossfade_context_items (AudioStreamView* view, Crossfade* xfade, Menu_Helpers::MenuList& edit_items, bool many)
+Editor::add_crossfade_context_items (AudioStreamView* view, boost::shared_ptr<Crossfade> xfade, Menu_Helpers::MenuList& edit_items, bool many)
 {
        using namespace Menu_Helpers;
        Menu     *xfade_menu = manage (new Menu);
@@ -1639,8 +1400,8 @@ Editor::add_crossfade_context_items (AudioStreamView* view, Crossfade* xfade, Me
                str = _("Unmute");
        }
 
-       items.push_back (MenuElem (str, bind (mem_fun(*this, &Editor::toggle_xfade_active), xfade)));
-       items.push_back (MenuElem (_("Edit"), bind (mem_fun(*this, &Editor::edit_xfade), xfade)));
+       items.push_back (MenuElem (str, bind (mem_fun(*this, &Editor::toggle_xfade_active), boost::weak_ptr<Crossfade> (xfade))));
+       items.push_back (MenuElem (_("Edit"), bind (mem_fun(*this, &Editor::edit_xfade), boost::weak_ptr<Crossfade> (xfade))));
 
        if (xfade->can_follow_overlap()) {
 
@@ -1681,36 +1442,48 @@ Editor::xfade_edit_right_region ()
        }
 }
 
+/** Add an element to a menu, settings its sensitivity.
+ * @param m Menu to add to.
+ * @param e Element to add.
+ * @param s true to make sensitive, false to make insensitive
+ */
+void
+Editor::add_item_with_sensitivity (Menu_Helpers::MenuList& m, Menu_Helpers::MenuElem e, bool s) const
+{
+       m.push_back (e);
+       if (!s) {
+               m.back().set_sensitive (false);
+       }
+}
+
+/** Add context menu items relevant to regions.
+ * @param edit_items List to add the items to.
+ */
 void
-Editor::add_region_context_items (AudioStreamView* sv, boost::shared_ptr<Region> region, Menu_Helpers::MenuList& edit_items)
+Editor::add_region_context_items (Menu_Helpers::MenuList& edit_items)
 {
        using namespace Menu_Helpers;
-       Menu     *region_menu = manage (new Menu);
-       MenuList& items       = region_menu->items();
+       Menu *region_menu = manage (new Menu);
+       MenuList& items = region_menu->items();
        region_menu->set_name ("ArdourContextMenu");
        
-       boost::shared_ptr<AudioRegion> ar;
-
-       if (region) {
-               ar = boost::dynamic_pointer_cast<AudioRegion> (region);
-       }
+       items.push_back (MenuElem (_("Edit..."), mem_fun(*this, &Editor::edit_region)));
+       items.push_back (MenuElem (_("Raise to top layer"), mem_fun(*this, &Editor::raise_region_to_top)));
+       items.push_back (MenuElem (_("Lower to bottom layer"), mem_fun  (*this, &Editor::lower_region_to_bottom)));
 
-       /* when this particular menu pops up, make the relevant region 
-          become selected.
-       */
+       Menu* sync_point_menu = manage (new Menu);
+       MenuList& sync_point_items = sync_point_menu->items();
+       sync_point_menu->set_name("ArdourContextMenu");
+       
+       sync_point_items.push_back (MenuElem (_("Define"), mem_fun(*this, &Editor::set_region_sync_from_edit_cursor)));
+       sync_point_items.push_back (MenuElem (_("Remove"), mem_fun(*this, &Editor::remove_region_sync)));
 
-       // region_menu->signal_map_event().connect (bind (mem_fun(*this, &Editor::set_selected_regionview_from_map_event), sv, boost::weak_ptr<Region>(region)));
+       items.push_back (MenuElem (_("Sync points"), *sync_point_menu));
 
-       items.push_back (MenuElem (_("Popup region editor"), mem_fun(*this, &Editor::edit_region)));
-       items.push_back (MenuElem (_("Raise to top layer"), mem_fun(*this, &Editor::raise_region_to_top)));
-       items.push_back (MenuElem (_("Lower to bottom layer"), mem_fun  (*this, &Editor::lower_region_to_bottom)));
-       items.push_back (SeparatorElem());
-       items.push_back (MenuElem (_("Define sync point"), mem_fun(*this, &Editor::set_region_sync_from_edit_cursor)));
-       items.push_back (MenuElem (_("Remove sync point"), mem_fun(*this, &Editor::remove_region_sync)));
-       items.push_back (SeparatorElem());
+       add_item_with_sensitivity (items, MenuElem (_("Audition"), mem_fun(*this, &Editor::audition_selected_region)), selection->regions.size() == 1);
+       
+       add_item_with_sensitivity (items, MenuElem (_("Export"), mem_fun(*this, &Editor::export_region)), selection->regions.size() == 1);
 
-       items.push_back (MenuElem (_("Audition"), mem_fun(*this, &Editor::audition_selected_region)));
-       items.push_back (MenuElem (_("Export"), mem_fun(*this, &Editor::export_region)));
        items.push_back (MenuElem (_("Bounce"), mem_fun(*this, &Editor::bounce_region_selection)));
 
 #ifdef FFT_ANALYSIS
@@ -1719,66 +1492,62 @@ Editor::add_region_context_items (AudioStreamView* sv, boost::shared_ptr<Region>
 
        items.push_back (SeparatorElem());
 
-       items.push_back (CheckMenuElem (_("Lock"), mem_fun(*this, &Editor::toggle_region_lock)));
-       region_lock_item = static_cast<CheckMenuItem*>(&items.back());
-       if (region->locked()) {
-               region_lock_item->set_active();
-       }
-       items.push_back (CheckMenuElem (_("Mute"), mem_fun(*this, &Editor::toggle_region_mute)));
-       region_mute_item = static_cast<CheckMenuItem*>(&items.back());
-       if (region->muted()) {
-               region_mute_item->set_active();
-       }
-       items.push_back (CheckMenuElem (_("Opaque"), mem_fun(*this, &Editor::toggle_region_opaque)));
-       region_opaque_item = static_cast<CheckMenuItem*>(&items.back());
-       if (region->opaque()) {
-               region_opaque_item->set_active();
-       }
-
-       items.push_back (CheckMenuElem (_("Original position"), mem_fun(*this, &Editor::naturalize)));
-       if (region->at_natural_position()) {
-               items.back().set_sensitive (false);
+       items.push_back (MenuElem (_("Lock"), bind (mem_fun (*this, &Editor::set_region_lock), true)));
+       items.push_back (MenuElem (_("Unlock"), bind (mem_fun (*this, &Editor::set_region_lock), false)));
+       items.push_back (MenuElem (_("Lock Position"), bind (mem_fun (*this, &Editor::set_region_position_lock), true)));
+       items.push_back (MenuElem (_("Unlock Position"), bind (mem_fun (*this, &Editor::set_region_position_lock), false)));
+       items.push_back (MenuElem (_("Mute"), bind (mem_fun (*this, &Editor::set_region_mute), true)));
+       items.push_back (MenuElem (_("Unmute"), bind (mem_fun (*this, &Editor::set_region_mute), false)));
+       items.push_back (MenuElem (_("Opaque"), bind (mem_fun (*this, &Editor::set_region_opaque), true)));
+       items.push_back (MenuElem (_("Transparent"), bind (mem_fun (*this, &Editor::set_region_opaque), false)));
+
+       /* We allow "Original position" if at least one region is not at its
+          natural position 
+       */
+       RegionSelection::iterator i = selection->regions.begin();
+       while (i != selection->regions.end() && (*i)->region()->at_natural_position() == true) {
+               ++i;
        }
 
+       add_item_with_sensitivity (items, MenuElem (_("Original position"), mem_fun(*this, &Editor::naturalize)), i != selection->regions.end());
+       
        items.push_back (SeparatorElem());
 
-       if (ar) {
-               
-               RegionView* rv = sv->find_view (ar);
-               AudioRegionView* arv = dynamic_cast<AudioRegionView*>(rv);
+       /* Find out if we have a selected audio region */
+       i = selection->regions.begin();
+       while (i != selection->regions.end() && boost::dynamic_pointer_cast<AudioRegion>((*i)->region()) == 0) {
+               ++i;
+       }
+       bool const have_selected_audio_region = (i != selection->regions.end());
 
-               items.push_back (MenuElem (_("Reset Envelope"), mem_fun(*this, &Editor::reset_region_gain_envelopes)));
-               
-               items.push_back (CheckMenuElem (_("Envelope Visible"), mem_fun(*this, &Editor::toggle_gain_envelope_visibility)));
-               region_envelope_visible_item = static_cast<CheckMenuItem*> (&items.back());
+       if (have_selected_audio_region) {
 
-               if (arv->envelope_visible()) {
-                       region_envelope_visible_item->set_active (true);
-               }
+               Menu* envelopes_menu = manage (new Menu);
+               MenuList& envelopes_items = envelopes_menu->items();
+               envelopes_menu->set_name ("ArdourContextMenu");
 
-               items.push_back (CheckMenuElem (_("Envelope Active"), mem_fun(*this, &Editor::toggle_gain_envelope_active)));
-               region_envelope_active_item = static_cast<CheckMenuItem*> (&items.back());
+               envelopes_items.push_back (MenuElem (_("Reset"), mem_fun(*this, &Editor::reset_region_gain_envelopes)));
+               envelopes_items.push_back (MenuElem (_("Visible"), bind (mem_fun (*this, &Editor::set_gain_envelope_visibility), true)));
+               envelopes_items.push_back (MenuElem (_("Invisible"), bind (mem_fun (*this, &Editor::set_gain_envelope_visibility), false)));
+               envelopes_items.push_back (MenuElem (_("Active"), bind (mem_fun (*this, &Editor::set_gain_envelope_active), true)));
+               envelopes_items.push_back (MenuElem (_("Inactive"), bind (mem_fun (*this, &Editor::set_gain_envelope_active), false)));
 
-               if (ar->envelope_active()) {
-                       region_envelope_active_item->set_active (true);
-               }
-
-               items.push_back (SeparatorElem());
-
-               if (ar->scale_amplitude() != 1.0f) {
-                       items.push_back (MenuElem (_("DeNormalize"), mem_fun(*this, &Editor::denormalize_region)));
-               } else {
-                       items.push_back (MenuElem (_("Normalize"), mem_fun(*this, &Editor::normalize_region)));
-               }
+               items.push_back (MenuElem (_("Envelopes"), *envelopes_menu));
+               
+               items.push_back (MenuElem (_("Denormalize"), mem_fun (*this, &Editor::denormalize_regions)));
+               items.push_back (MenuElem (_("Normalize"), mem_fun (*this, &Editor::normalize_regions)));
        }
-       items.push_back (MenuElem (_("Reverse"), mem_fun(*this, &Editor::reverse_region)));
+       
+       items.push_back (MenuElem (_("Reverse"), mem_fun(*this, &Editor::reverse_regions)));
        items.push_back (SeparatorElem());
 
 
        /* range related stuff */
-
-       items.push_back (MenuElem (_("Add Range Markers"), mem_fun (*this, &Editor::add_location_from_audio_region)));
-       items.push_back (MenuElem (_("Set Range Selection"), mem_fun (*this, &Editor::set_selection_from_audio_region)));
+       
+       add_item_with_sensitivity (items, MenuElem (_("Add range markers"), mem_fun (*this, &Editor::add_location_from_audio_region)), selection->regions.size() == 1);
+       
+       add_item_with_sensitivity (items, MenuElem (_("Set range selection"), mem_fun (*this, &Editor::set_selection_from_audio_region)), selection->regions.size() == 1);
+       
        items.push_back (SeparatorElem());
                         
        /* Nudge region */
@@ -1787,13 +1556,12 @@ Editor::add_region_context_items (AudioStreamView* sv, boost::shared_ptr<Region>
        MenuList& nudge_items = nudge_menu->items();
        nudge_menu->set_name ("ArdourContextMenu");
        
-       nudge_items.push_back (MenuElem (_("Nudge fwd"), (bind (mem_fun(*this, &Editor::nudge_forward), false))));
-       nudge_items.push_back (MenuElem (_("Nudge bwd"), (bind (mem_fun(*this, &Editor::nudge_backward), false))));
-       nudge_items.push_back (MenuElem (_("Nudge fwd by capture offset"), (mem_fun(*this, &Editor::nudge_forward_capture_offset))));
-       nudge_items.push_back (MenuElem (_("Nudge bwd by capture offset"), (mem_fun(*this, &Editor::nudge_backward_capture_offset))));
+       nudge_items.push_back (MenuElem (_("Nudge forward"), (bind (mem_fun(*this, &Editor::nudge_forward), false))));
+       nudge_items.push_back (MenuElem (_("Nudge backward"), (bind (mem_fun(*this, &Editor::nudge_backward), false))));
+       nudge_items.push_back (MenuElem (_("Nudge forward by capture offset"), (mem_fun(*this, &Editor::nudge_forward_capture_offset))));
+       nudge_items.push_back (MenuElem (_("Nudge backward by capture offset"), (mem_fun(*this, &Editor::nudge_backward_capture_offset))));
 
        items.push_back (MenuElem (_("Nudge"), *nudge_menu));
-       items.push_back (SeparatorElem());
 
        Menu *trim_menu = manage (new Menu);
        MenuList& trim_items = trim_menu->items();
@@ -1803,39 +1571,24 @@ Editor::add_region_context_items (AudioStreamView* sv, boost::shared_ptr<Region>
        trim_items.push_back (MenuElem (_("Edit cursor to end"), mem_fun(*this, &Editor::trim_region_to_edit_cursor)));
                             
        items.push_back (MenuElem (_("Trim"), *trim_menu));
-       items.push_back (SeparatorElem());
-
        items.push_back (MenuElem (_("Split"), (mem_fun(*this, &Editor::split_region))));
-       region_edit_menu_split_item = &items.back();
-
        items.push_back (MenuElem (_("Make mono regions"), (mem_fun(*this, &Editor::split_multichannel_region))));
-       region_edit_menu_split_multichannel_item = &items.back();
-
        items.push_back (MenuElem (_("Duplicate"), (bind (mem_fun(*this, &Editor::duplicate_dialog), true))));
-       items.push_back (MenuElem (_("Fill Track"), (mem_fun(*this, &Editor::region_fill_track))));
+       items.push_back (MenuElem (_("Fill track"), (mem_fun(*this, &Editor::region_fill_track))));
        items.push_back (SeparatorElem());
-       items.push_back (MenuElem (_("Remove"), mem_fun(*this, &Editor::remove_clicked_region)));
+       items.push_back (MenuElem (_("Remove"), mem_fun(*this, &Editor::remove_selected_regions)));
 
        /* OK, stick the region submenu at the top of the list, and then add
           the standard items.
        */
 
-       /* we have to hack up the region name because "_" has a special
-          meaning for menu titles.
-       */
-
-       string::size_type pos = 0;
-       string menu_item_name = region->name();
-
-       while ((pos = menu_item_name.find ("_", pos)) != string::npos) {
-               menu_item_name.replace (pos, 1, "__");
-               pos += 2;
-       }
-       
+       string const menu_item_name = selection->regions.size() > 1 ? _("Regions") : _("Region");
        edit_items.push_back (MenuElem (menu_item_name, *region_menu));
-       edit_items.push_back (SeparatorElem());
 }
 
+/** Add context menu items relevant to selection ranges.
+ * @param edit_items List to add the items to.
+ */
 void
 Editor::add_selection_context_items (Menu_Helpers::MenuList& edit_items)
 {
@@ -1859,13 +1612,14 @@ Editor::add_selection_context_items (Menu_Helpers::MenuList& edit_items)
        items.push_back (SeparatorElem());
        items.push_back (MenuElem (_("Select all in range"), mem_fun(*this, &Editor::select_all_selectables_using_time_selection)));
        items.push_back (SeparatorElem());
+       items.push_back (MenuElem (_("Add range markers"), mem_fun (*this, &Editor::add_location_from_selection)));
        items.push_back (MenuElem (_("Set range to loop range"), mem_fun(*this, &Editor::set_selection_from_loop)));
        items.push_back (MenuElem (_("Set range to punch range"), mem_fun(*this, &Editor::set_selection_from_punch)));
        items.push_back (SeparatorElem());
        items.push_back (MenuElem (_("Crop region to range"), mem_fun(*this, &Editor::crop_region_to_selection)));
        items.push_back (MenuElem (_("Fill range with region"), mem_fun(*this, &Editor::region_fill_selection)));
        items.push_back (MenuElem (_("Duplicate range"), bind (mem_fun(*this, &Editor::duplicate_dialog), false)));
-       items.push_back (MenuElem (_("Create chunk from range"), mem_fun(*this, &Editor::name_selection)));
+       items.push_back (MenuElem (_("Create chunk from range"), mem_fun(*this, &Editor::create_named_selection)));
        items.push_back (SeparatorElem());
        items.push_back (MenuElem (_("Bounce range"), mem_fun(*this, &Editor::bounce_range_selection)));
        items.push_back (MenuElem (_("Export range"), mem_fun(*this, &Editor::export_selection)));
@@ -1874,11 +1628,33 @@ Editor::add_selection_context_items (Menu_Helpers::MenuList& edit_items)
        edit_items.push_back (SeparatorElem());
 }
 
+/** Add context menu items relevant to busses or audio tracks.
+ * @param edit_items List to add the items to.
+ */
 void
-Editor::add_dstream_context_items (Menu_Helpers::MenuList& edit_items)
+Editor::add_bus_or_audio_track_context_items (Menu_Helpers::MenuList& edit_items)
 {
        using namespace Menu_Helpers;
 
+       /* We add every possible action here, and de-sensitize things
+          that aren't allowed.  The sensitivity logic is a bit spread out;
+          on the one hand I'm using things like can_cut_copy (), which is
+          reasonably complicated and so perhaps better near the function that
+          it expresses sensitivity for, and on the other hand checks
+          in this function as well.  You can't really have can_* for everything
+          or the number of methods would get silly. */
+
+       bool const one_selected_region = selection->regions.size() == 1;
+
+       /* Count the number of selected audio tracks */
+       int n_audio_tracks = 0;
+       for (TrackSelection::iterator i = selection->tracks.begin(); i != selection->tracks.end(); ++i) {
+               RouteTimeAxisView const * r = dynamic_cast<RouteTimeAxisView*>(*i);
+               if (r && r->is_audio_track()) {
+                       n_audio_tracks++;
+               }
+       }
+
        /* Playback */
 
        Menu *play_menu = manage (new Menu);
@@ -1887,9 +1663,9 @@ Editor::add_dstream_context_items (Menu_Helpers::MenuList& edit_items)
        
        play_items.push_back (MenuElem (_("Play from edit cursor"), mem_fun(*this, &Editor::play_from_edit_cursor)));
        play_items.push_back (MenuElem (_("Play from start"), mem_fun(*this, &Editor::play_from_start)));
-       play_items.push_back (MenuElem (_("Play region"), mem_fun(*this, &Editor::play_selected_region)));
-       play_items.push_back (SeparatorElem());
-       play_items.push_back (MenuElem (_("Loop Region"), mem_fun(*this, &Editor::loop_selected_region)));
+       add_item_with_sensitivity (play_items, MenuElem (_("Play region"), mem_fun(*this, &Editor::play_selected_region)), one_selected_region);
+       
+       add_item_with_sensitivity (play_items, MenuElem (_("Loop region"), mem_fun(*this, &Editor::loop_selected_region)), one_selected_region);
        
        edit_items.push_back (MenuElem (_("Play"), *play_menu));
 
@@ -1898,21 +1674,33 @@ Editor::add_dstream_context_items (Menu_Helpers::MenuList& edit_items)
        Menu *select_menu = manage (new Menu);
        MenuList& select_items = select_menu->items();
        select_menu->set_name ("ArdourContextMenu");
+
+       string str = selection->tracks.size() == 1 ? _("Select all in track") : _("Select all in tracks");
+
+       select_items.push_back (MenuElem (str, bind (mem_fun(*this, &Editor::select_all_in_selected_tracks), Selection::Set)));
+       
+       select_items.push_back (MenuElem (_("Select all"), bind (mem_fun(*this, &Editor::select_all), Selection::Set)));
+
+       str = selection->tracks.size() == 1 ? _("Invert selection in track") : _("Invert selection in tracks");
+       
+       select_items.push_back (MenuElem (str, mem_fun(*this, &Editor::invert_selection_in_selected_tracks)));
        
-       select_items.push_back (MenuElem (_("Select All in track"), bind (mem_fun(*this, &Editor::select_all_in_track), Selection::Set)));
-       select_items.push_back (MenuElem (_("Select All"), bind (mem_fun(*this, &Editor::select_all), Selection::Set)));
-       select_items.push_back (MenuElem (_("Invert selection in track"), mem_fun(*this, &Editor::invert_selection_in_track)));
        select_items.push_back (MenuElem (_("Invert selection"), mem_fun(*this, &Editor::invert_selection)));
        select_items.push_back (SeparatorElem());
-       select_items.push_back (MenuElem (_("Set range to loop range"), mem_fun(*this, &Editor::set_selection_from_loop)));
-       select_items.push_back (MenuElem (_("Set range to punch range"), mem_fun(*this, &Editor::set_selection_from_punch)));
-       select_items.push_back (SeparatorElem());
+
+       if (n_audio_tracks) {
+               select_items.push_back (MenuElem (_("Set range to loop range"), mem_fun(*this, &Editor::set_selection_from_loop)));
+               select_items.push_back (MenuElem (_("Set range to punch range"), mem_fun(*this, &Editor::set_selection_from_punch)));
+       }
+       
        select_items.push_back (MenuElem (_("Select all after edit cursor"), bind (mem_fun(*this, &Editor::select_all_selectables_using_cursor), edit_cursor, true)));
        select_items.push_back (MenuElem (_("Select all before edit cursor"), bind (mem_fun(*this, &Editor::select_all_selectables_using_cursor), edit_cursor, false)));
        select_items.push_back (MenuElem (_("Select all after playhead"), bind (mem_fun(*this, &Editor::select_all_selectables_using_cursor), playhead_cursor, true)));
        select_items.push_back (MenuElem (_("Select all before playhead"), bind (mem_fun(*this, &Editor::select_all_selectables_using_cursor), playhead_cursor, false)));
-       select_items.push_back (MenuElem (_("Select all between cursors"), bind (mem_fun(*this, &Editor::select_all_selectables_between_cursors), playhead_cursor, edit_cursor)));
-       select_items.push_back (SeparatorElem());
+
+       if (n_audio_tracks) {
+               select_items.push_back (MenuElem (_("Select all between cursors"), bind (mem_fun(*this, &Editor::select_all_selectables_between_cursors), playhead_cursor, edit_cursor)));
+       }
 
        edit_items.push_back (MenuElem (_("Select"), *select_menu));
 
@@ -1921,105 +1709,75 @@ Editor::add_dstream_context_items (Menu_Helpers::MenuList& edit_items)
        Menu *cutnpaste_menu = manage (new Menu);
        MenuList& cutnpaste_items = cutnpaste_menu->items();
        cutnpaste_menu->set_name ("ArdourContextMenu");
-       
-       cutnpaste_items.push_back (MenuElem (_("Cut"), mem_fun(*this, &Editor::cut)));
-       cutnpaste_items.push_back (MenuElem (_("Copy"), mem_fun(*this, &Editor::copy)));
-       cutnpaste_items.push_back (MenuElem (_("Paste at edit cursor"), bind (mem_fun(*this, &Editor::paste), 1.0f)));
-       cutnpaste_items.push_back (MenuElem (_("Paste at mouse"), mem_fun(*this, &Editor::mouse_paste)));
-
-       cutnpaste_items.push_back (SeparatorElem());
-
-       cutnpaste_items.push_back (MenuElem (_("Align"), bind (mem_fun(*this, &Editor::align), ARDOUR::SyncPoint)));
-       cutnpaste_items.push_back (MenuElem (_("Align Relative"), bind (mem_fun(*this, &Editor::align_relative), ARDOUR::SyncPoint)));
-
-       cutnpaste_items.push_back (SeparatorElem());
-
-       cutnpaste_items.push_back (MenuElem (_("Insert chunk"), bind (mem_fun(*this, &Editor::paste_named_selection), 1.0f)));
-
-       edit_items.push_back (MenuElem (_("Edit"), *cutnpaste_menu));
 
-       /* Adding new material */
+       add_item_with_sensitivity (cutnpaste_items, MenuElem (_("Cut"), mem_fun(*this, &Editor::cut)), can_cut_copy ());
        
-       edit_items.push_back (SeparatorElem());
-       edit_items.push_back (MenuElem (_("Insert Selected Region"), bind (mem_fun(*this, &Editor::insert_region_list_selection), 1.0f)));
-       edit_items.push_back (MenuElem (_("Insert Existing Audio"), bind (mem_fun(*this, &Editor::add_external_audio_action), ImportToTrack)));
-
-       /* Nudge track */
-
-       Menu *nudge_menu = manage (new Menu());
-       MenuList& nudge_items = nudge_menu->items();
-       nudge_menu->set_name ("ArdourContextMenu");
+       add_item_with_sensitivity (cutnpaste_items, MenuElem (_("Copy"), mem_fun(*this, &Editor::copy)), can_cut_copy ());
        
-       edit_items.push_back (SeparatorElem());
-       nudge_items.push_back (MenuElem (_("Nudge entire track fwd"), (bind (mem_fun(*this, &Editor::nudge_track), false, true))));
-       nudge_items.push_back (MenuElem (_("Nudge track after edit cursor fwd"), (bind (mem_fun(*this, &Editor::nudge_track), true, true))));
-       nudge_items.push_back (MenuElem (_("Nudge entire track bwd"), (bind (mem_fun(*this, &Editor::nudge_track), false, false))));
-       nudge_items.push_back (MenuElem (_("Nudge track after edit cursor bwd"), (bind (mem_fun(*this, &Editor::nudge_track), true, false))));
-
-       edit_items.push_back (MenuElem (_("Nudge"), *nudge_menu));
-}
-
-void
-Editor::add_bus_context_items (Menu_Helpers::MenuList& edit_items)
-{
-       using namespace Menu_Helpers;
+       if (n_audio_tracks) {
+               cutnpaste_items.push_back (MenuElem (_("Paste at edit cursor"), bind (mem_fun(*this, &Editor::paste), 1.0f)));
+               cutnpaste_items.push_back (MenuElem (_("Paste at mouse"), mem_fun(*this, &Editor::mouse_paste)));
+               
+               cutnpaste_items.push_back (SeparatorElem());
+               
+               cutnpaste_items.push_back (MenuElem (_("Align"), bind (mem_fun(*this, &Editor::align), ARDOUR::SyncPoint)));
+               cutnpaste_items.push_back (MenuElem (_("Align relative"), bind (mem_fun(*this, &Editor::align_relative), ARDOUR::SyncPoint)));
+               cutnpaste_items.push_back (MenuElem (_("Insert chunk"), bind (mem_fun(*this, &Editor::paste_named_selection), 1.0f)));
+       } else {
+               cutnpaste_items.push_back (MenuElem (_("Paste"), bind (mem_fun(*this, &Editor::paste), 1.0f)));
+       }
 
-       /* Playback */
+       edit_items.push_back (MenuElem (_("Edit"), *cutnpaste_menu));
+               
+       if (n_audio_tracks) {
 
-       Menu *play_menu = manage (new Menu);
-       MenuList& play_items = play_menu->items();
-       play_menu->set_name ("ArdourContextMenu");
+               Menu *track_menu = manage (new Menu);
+               MenuList& track_items = track_menu->items();
+               track_menu->set_name ("ArdourContextMenu");
+               
+               /* Adding new material */
        
-       play_items.push_back (MenuElem (_("Play from edit cursor"), mem_fun(*this, &Editor::play_from_edit_cursor)));
-       play_items.push_back (MenuElem (_("Play from start"), mem_fun(*this, &Editor::play_from_start)));
-       edit_items.push_back (MenuElem (_("Play"), *play_menu));
+               add_item_with_sensitivity (track_items, MenuElem (_("Insert selected region"), bind (mem_fun(*this, &Editor::insert_region_list_selection), 1.0f)), n_audio_tracks == 1);
+               
+               add_item_with_sensitivity (track_items, MenuElem (_("Insert existing audio"), bind (mem_fun(*this, &Editor::add_external_audio_action), ImportToTrack)), n_audio_tracks == 1);
+               
+               /* Nudge */
 
-       /* Selection */
+               Menu *nudge_menu = manage (new Menu());
+               MenuList& nudge_items = nudge_menu->items();
+               nudge_menu->set_name ("ArdourContextMenu");
 
-       Menu *select_menu = manage (new Menu);
-       MenuList& select_items = select_menu->items();
-       select_menu->set_name ("ArdourContextMenu");
-       
-       select_items.push_back (MenuElem (_("Select All in track"), bind (mem_fun(*this, &Editor::select_all_in_track), Selection::Set)));
-       select_items.push_back (MenuElem (_("Select All"), bind (mem_fun(*this, &Editor::select_all), Selection::Set)));
-       select_items.push_back (MenuElem (_("Invert selection in track"), mem_fun(*this, &Editor::invert_selection_in_track)));
-       select_items.push_back (MenuElem (_("Invert selection"), mem_fun(*this, &Editor::invert_selection)));
-       select_items.push_back (SeparatorElem());
-       select_items.push_back (MenuElem (_("Select all after edit cursor"), bind (mem_fun(*this, &Editor::select_all_selectables_using_cursor), edit_cursor, true)));
-       select_items.push_back (MenuElem (_("Select all before edit cursor"), bind (mem_fun(*this, &Editor::select_all_selectables_using_cursor), edit_cursor, false)));
-       select_items.push_back (MenuElem (_("Select all after playhead"), bind (mem_fun(*this, &Editor::select_all_selectables_using_cursor), playhead_cursor, true)));
-       select_items.push_back (MenuElem (_("Select all before playhead"), bind (mem_fun(*this, &Editor::select_all_selectables_using_cursor), playhead_cursor, false)));
+               str = selection->tracks.size() == 1 ? _("Nudge track forward") : _("Nude tracks forward");
+               nudge_items.push_back (MenuElem (str, (bind (mem_fun(*this, &Editor::nudge_selected_tracks), false, true))));
 
-       edit_items.push_back (MenuElem (_("Select"), *select_menu));
+               str = selection->tracks.size() == 1 ? _("Nudge track after edit cursor forward") : _("Nudge tracks after edit cursor forward");
+               
+               nudge_items.push_back (MenuElem (str, (bind (mem_fun(*this, &Editor::nudge_selected_tracks), true, true))));
 
-       /* Cut-n-Paste */
+               str = selection->tracks.size() == 1 ? _("Nudge track backward") : _("Nudge tracks backward");
+               
+               nudge_items.push_back (MenuElem (str, (bind (mem_fun(*this, &Editor::nudge_selected_tracks), false, false))));
 
-       Menu *cutnpaste_menu = manage (new Menu);
-       MenuList& cutnpaste_items = cutnpaste_menu->items();
-       cutnpaste_menu->set_name ("ArdourContextMenu");
-       
-       cutnpaste_items.push_back (MenuElem (_("Cut"), mem_fun(*this, &Editor::cut)));
-       cutnpaste_items.push_back (MenuElem (_("Copy"), mem_fun(*this, &Editor::copy)));
-       cutnpaste_items.push_back (MenuElem (_("Paste"), bind (mem_fun(*this, &Editor::paste), 1.0f)));
+               str = selection->tracks.size() == 1 ? _("Nudge track after edit cursor backward") : _("Nudge tracks after edit cursor backward");
+               
+               nudge_items.push_back (MenuElem (str, (bind (mem_fun(*this, &Editor::nudge_selected_tracks), true, false))));
+               
+               track_items.push_back (MenuElem (_("Nudge"), *nudge_menu));
 
-       Menu *nudge_menu = manage (new Menu());
-       MenuList& nudge_items = nudge_menu->items();
-       nudge_menu->set_name ("ArdourContextMenu");
-       
-       edit_items.push_back (SeparatorElem());
-       nudge_items.push_back (MenuElem (_("Nudge entire track fwd"), (bind (mem_fun(*this, &Editor::nudge_track), false, true))));
-       nudge_items.push_back (MenuElem (_("Nudge track after edit cursor fwd"), (bind (mem_fun(*this, &Editor::nudge_track), true, true))));
-       nudge_items.push_back (MenuElem (_("Nudge entire track bwd"), (bind (mem_fun(*this, &Editor::nudge_track), false, false))));
-       nudge_items.push_back (MenuElem (_("Nudge track after edit cursor bwd"), (bind (mem_fun(*this, &Editor::nudge_track), true, false))));
+               /* Freeze */
+               track_items.push_back (MenuElem (_("Freeze"), mem_fun(*this, &Editor::freeze_routes)));
+               track_items.push_back (MenuElem (_("Unfreeze"), mem_fun(*this, &Editor::unfreeze_routes)));
 
-       edit_items.push_back (MenuElem (_("Nudge"), *nudge_menu));
+               str = selection->tracks.size() == 1 ? _("Track") : _("Tracks");
+               edit_items.push_back (MenuElem (str, *track_menu));
+       }
 }
 
 /* CURSOR SETTING AND MARKS AND STUFF */
 
 void
 Editor::set_snap_to (SnapType st)
-{
+{      
        snap_type = st;
        string str = snap_type_strings[(int) st];
 
@@ -2089,12 +1847,38 @@ Editor::set_state (const XMLNode& node)
        set_default_size (g.base_width, g.base_height);
        move (x, y);
 
+       if (session && (prop = node.property ("playhead"))) {
+               nframes_t pos = atol (prop->value().c_str());
+               playhead_cursor->set_position (pos);
+       } else {
+               playhead_cursor->set_position (0);
+
+               /* reset_x_origin() doesn't work right here, since the old
+                  position may be zero already, and it does nothing in such
+                  circumstances.
+               */
+               
+               leftmost_frame = 0;
+               horizontal_adjustment.set_value (0);
+       }
+
+       if (session && (prop = node.property ("edit-cursor"))) {
+               nframes_t pos = atol (prop->value().c_str());
+               edit_cursor->set_position (pos);
+       } else {
+               edit_cursor->set_position (0);
+       }
+
+       if ((prop = node.property ("mixer-width"))) {
+               editor_mixer_strip_width = Width (string_2_enum (prop->value(), editor_mixer_strip_width));
+       }
+
        if ((prop = node.property ("zoom-focus"))) {
                set_zoom_focus ((ZoomFocus) atoi (prop->value()));
        }
 
        if ((prop = node.property ("zoom"))) {
-               set_frames_per_unit (PBD::atof (prop->value()));
+               reset_zoom (PBD::atof (prop->value()));
        }
 
        if ((prop = node.property ("snap-to"))) {
@@ -2152,16 +1936,16 @@ Editor::set_state (const XMLNode& node)
 
        if ((prop = node.property ("follow-playhead"))) {
                bool yn = (prop->value() == "yes");
+               set_follow_playhead (yn);
                RefPtr<Action> act = ActionManager::get_action (X_("Editor"), X_("toggle-follow-playhead"));
                if (act) {
                        RefPtr<ToggleAction> tact = RefPtr<ToggleAction>::cast_dynamic(act);
-                       /* do it twice to force the change */
-                       tact->set_active (!yn);
-                       tact->set_active (yn);
+                       if (tact->get_active() != yn) {
+                               tact->set_active (yn);
+                       }
                }
        }
 
-
        if ((prop = node.property ("region-list-sort-type"))) {
                region_list_sort_type = (Editing::RegionListSortType) -1; // force change 
                reset_region_list_sort_type(str2regionlistsorttype(prop->value()));
@@ -2187,6 +1971,22 @@ Editor::set_state (const XMLNode& node)
                        tact->set_active (yn);
                }
        }
+       
+       if ((prop = node.property ("show-editor-list"))) {
+
+               Glib::RefPtr<Action> act = ActionManager::get_action (X_("Editor"), X_("show-editor-list"));
+               assert(act);
+               if (act) {
+
+                       Glib::RefPtr<ToggleAction> tact = Glib::RefPtr<ToggleAction>::cast_dynamic(act);
+                       bool yn = (prop->value() == X_("yes"));
+
+                       /* do it twice to force the change */
+                       
+                       tact->set_active (!yn);
+                       tact->set_active (yn);
+               }
+       }
 
 
        return 0;
@@ -2229,6 +2029,8 @@ Editor::get_state ()
                node->add_child_nocopy (*geometry);
        }
 
+       maybe_add_mixer_strip_width (*node);
+       
        snprintf (buf, sizeof(buf), "%d", (int) zoom_focus);
        node->add_property ("zoom-focus", buf);
        snprintf (buf, sizeof(buf), "%f", frames_per_unit);
@@ -2238,6 +2040,11 @@ Editor::get_state ()
        snprintf (buf, sizeof(buf), "%d", (int) snap_mode);
        node->add_property ("snap-mode", buf);
 
+       snprintf (buf, sizeof (buf), "%" PRIu32, playhead_cursor->current_frame);
+       node->add_property ("playhead", buf);
+       snprintf (buf, sizeof (buf), "%" PRIu32, edit_cursor->current_frame);
+       node->add_property ("edit-cursor", buf);
+
        node->add_property ("show-waveforms", _show_waveforms ? "yes" : "no");
        node->add_property ("show-waveforms-recording", _show_waveforms_recording ? "yes" : "no");
        node->add_property ("show-measures", _show_measures ? "yes" : "no");
@@ -2251,6 +2058,12 @@ Editor::get_state ()
                Glib::RefPtr<ToggleAction> tact = Glib::RefPtr<ToggleAction>::cast_dynamic(act);
                node->add_property (X_("show-editor-mixer"), tact->get_active() ? "yes" : "no");
        }
+       
+       act = ActionManager::get_action (X_("Editor"), X_("show-editor-list"));
+       if (act) {
+               Glib::RefPtr<ToggleAction> tact = Glib::RefPtr<ToggleAction>::cast_dynamic(act);
+               node->add_property (X_("show-editor-list"), tact->get_active() ? "yes" : "no");
+       }
 
        return *node;
 }
@@ -2260,18 +2073,11 @@ Editor::get_state ()
 TimeAxisView *
 Editor::trackview_by_y_position (double y)
 {
-       TrackViewList::iterator iter;
-       TimeAxisView *tv;
-
-       for (iter = track_views.begin(); iter != track_views.end(); ++iter) {
-
-               tv = *iter;
+       for (TrackViewList::iterator iter = track_views.begin(); iter != track_views.end(); ++iter) {
 
-               if (tv->hidden()) {
-                       continue;
-               }
+               TimeAxisView *tv;
 
-               if (tv->y_position <= y && y < ((tv->y_position + tv->height + track_spacing))) {
+               if ((tv = (*iter)->covers_y_position (y)) != 0) {
                        return tv;
                }
        }
@@ -2280,7 +2086,7 @@ Editor::trackview_by_y_position (double y)
 }
 
 void
-Editor::snap_to (nframes_t& start, int32_t direction, bool for_mark)
+Editor::snap_to (nframes64_t& start, int32_t direction, bool for_mark)
 {
        Location* before = 0;
        Location* after = 0;
@@ -2289,10 +2095,11 @@ Editor::snap_to (nframes_t& start, int32_t direction, bool for_mark)
                return;
        }
 
-       const nframes_t one_second = session->frame_rate();
-       const nframes_t one_minute = session->frame_rate() * 60;
-
-       nframes_t presnap = start;
+       const nframes64_t one_second = session->frame_rate();
+       const nframes64_t one_minute = session->frame_rate() * 60;
+       const nframes64_t one_smpte_second = (nframes64_t)(rint(session->smpte_frames_per_second()) * session->frames_per_smpte_frame());
+       nframes64_t one_smpte_minute = (nframes64_t)(rint(session->smpte_frames_per_second()) * session->frames_per_smpte_frame() * 60);
+       nframes64_t presnap = start;
 
        switch (snap_type) {
        case SnapToFrame:
@@ -2305,8 +2112,9 @@ Editor::snap_to (nframes_t& start, int32_t direction, bool for_mark)
                        start = (nframes_t) floor ((double) start / (one_second / 75)) * (one_second / 75);
                }
                break;
+
        case SnapToSMPTEFrame:
-               if (direction) {
+               if (fmod((double)start, (double)session->frames_per_smpte_frame()) > (session->frames_per_smpte_frame() / 2)) {
                        start = (nframes_t) (ceil ((double) start / session->frames_per_smpte_frame()) * session->frames_per_smpte_frame());
                } else {
                        start = (nframes_t) (floor ((double) start / session->frames_per_smpte_frame()) *  session->frames_per_smpte_frame());
@@ -2320,10 +2128,10 @@ Editor::snap_to (nframes_t& start, int32_t direction, bool for_mark)
                } else {
                        start -= session->smpte_offset ();
                }    
-               if (direction > 0) {
-                       start = (nframes_t) ceil ((double) start / one_second) * one_second;
+               if (start % one_smpte_second > one_smpte_second / 2) {
+                       start = (nframes_t) ceil ((double) start / one_smpte_second) * one_smpte_second;
                } else {
-                       start = (nframes_t) floor ((double) start / one_second) * one_second;
+                       start = (nframes_t) floor ((double) start / one_smpte_second) * one_smpte_second;
                }
                
                if (session->smpte_offset_negative())
@@ -2341,10 +2149,10 @@ Editor::snap_to (nframes_t& start, int32_t direction, bool for_mark)
                } else {
                        start -= session->smpte_offset ();
                }
-               if (direction) {
-                       start = (nframes_t) ceil ((double) start / one_minute) * one_minute;
+               if (start % one_smpte_minute > one_smpte_minute / 2) {
+                       start = (nframes_t) ceil ((double) start / one_smpte_minute) * one_smpte_minute;
                } else {
-                       start = (nframes_t) floor ((double) start / one_minute) * one_minute;
+                       start = (nframes_t) floor ((double) start / one_smpte_minute) * one_smpte_minute;
                }
                if (session->smpte_offset_negative())
                {
@@ -2355,7 +2163,7 @@ Editor::snap_to (nframes_t& start, int32_t direction, bool for_mark)
                break;
                
        case SnapToSeconds:
-               if (direction) {
+               if (start % one_second > one_second / 2) {
                        start = (nframes_t) ceil ((double) start / one_second) * one_second;
                } else {
                        start = (nframes_t) floor ((double) start / one_second) * one_second;
@@ -2363,7 +2171,7 @@ Editor::snap_to (nframes_t& start, int32_t direction, bool for_mark)
                break;
                
        case SnapToMinutes:
-               if (direction) {
+               if (start % one_minute > one_minute / 2) {
                        start = (nframes_t) ceil ((double) start / one_minute) * one_minute;
                } else {
                        start = (nframes_t) floor ((double) start / one_minute) * one_minute;
@@ -2516,6 +2324,9 @@ Editor::setup_toolbar ()
        mouse_mode_buttons.push_back (&mouse_timefx_button);
        mouse_audition_button.add (*(manage (new Image (::get_icon("tool_audition")))));
        mouse_audition_button.set_relief(Gtk::RELIEF_NONE);
+       mouse_note_button.add (*(manage (new Image (::get_icon("tool_note")))));
+       mouse_note_button.set_relief(Gtk::RELIEF_NONE);
+       mouse_mode_buttons.push_back (&mouse_note_button);
        mouse_mode_buttons.push_back (&mouse_audition_button);
        
        mouse_mode_button_set = new GroupedButtons (mouse_mode_buttons);
@@ -2530,6 +2341,7 @@ Editor::setup_toolbar ()
        mouse_mode_button_box.pack_start(mouse_gain_button, true, true);
        mouse_mode_button_box.pack_start(mouse_timefx_button, true, true);
        mouse_mode_button_box.pack_start(mouse_audition_button, true, true);
+       mouse_mode_button_box.pack_start(mouse_note_button, true, true);
        mouse_mode_button_box.set_homogeneous(true);
 
        vector<string> edit_mode_strings;
@@ -2562,6 +2374,7 @@ Editor::setup_toolbar ()
        mouse_zoom_button.set_name ("MouseModeButton");
        mouse_timefx_button.set_name ("MouseModeButton");
        mouse_audition_button.set_name ("MouseModeButton");
+       mouse_note_button.set_name ("MouseModeButton");
 
        ARDOUR_UI::instance()->tooltips().set_tip (mouse_move_button, _("Select/Move Objects"));
        ARDOUR_UI::instance()->tooltips().set_tip (mouse_select_button, _("Select/Move Ranges"));
@@ -2569,6 +2382,7 @@ Editor::setup_toolbar ()
        ARDOUR_UI::instance()->tooltips().set_tip (mouse_zoom_button, _("Select Zoom Range"));
        ARDOUR_UI::instance()->tooltips().set_tip (mouse_timefx_button, _("Stretch/Shrink Regions"));
        ARDOUR_UI::instance()->tooltips().set_tip (mouse_audition_button, _("Listen to Specific Regions"));
+       ARDOUR_UI::instance()->tooltips().set_tip (mouse_note_button, _("Edit MIDI Notes"));
 
        mouse_move_button.unset_flags (CAN_FOCUS);
        mouse_select_button.unset_flags (CAN_FOCUS);
@@ -2576,6 +2390,7 @@ Editor::setup_toolbar ()
        mouse_zoom_button.unset_flags (CAN_FOCUS);
        mouse_timefx_button.unset_flags (CAN_FOCUS);
        mouse_audition_button.unset_flags (CAN_FOCUS);
+       mouse_note_button.unset_flags (CAN_FOCUS);
 
        mouse_select_button.signal_toggled().connect (bind (mem_fun(*this, &Editor::mouse_mode_toggled), Editing::MouseRange));
        mouse_select_button.signal_button_release_event().connect (mem_fun(*this, &Editor::mouse_select_button_release));
@@ -2585,6 +2400,7 @@ Editor::setup_toolbar ()
        mouse_zoom_button.signal_toggled().connect (bind (mem_fun(*this, &Editor::mouse_mode_toggled), Editing::MouseZoom));
        mouse_timefx_button.signal_toggled().connect (bind (mem_fun(*this, &Editor::mouse_mode_toggled), Editing::MouseTimeFX));
        mouse_audition_button.signal_toggled().connect (bind (mem_fun(*this, &Editor::mouse_mode_toggled), Editing::MouseAudition));
+       mouse_note_button.signal_toggled().connect (bind (mem_fun(*this, &Editor::mouse_mode_toggled), Editing::MouseNote));
 
        // mouse_move_button.set_active (true);
        
@@ -2595,35 +2411,33 @@ Editor::setup_toolbar ()
        zoom_box.set_border_width (2);
 
        zoom_in_button.set_name ("EditorTimeButton");
+       zoom_in_button.set_size_request(-1,16);
        zoom_in_button.add (*(manage (new Image (::get_icon("zoom_in")))));
        zoom_in_button.signal_clicked().connect (bind (mem_fun(*this, &Editor::temporal_zoom_step), false));
        ARDOUR_UI::instance()->tooltips().set_tip (zoom_in_button, _("Zoom In"));
        
        zoom_out_button.set_name ("EditorTimeButton");
+       zoom_out_button.set_size_request(-1,16);
        zoom_out_button.add (*(manage (new Image (::get_icon("zoom_out")))));
        zoom_out_button.signal_clicked().connect (bind (mem_fun(*this, &Editor::temporal_zoom_step), true));
        ARDOUR_UI::instance()->tooltips().set_tip (zoom_out_button, _("Zoom Out"));
 
        zoom_out_full_button.set_name ("EditorTimeButton");
+       zoom_out_full_button.set_size_request(-1,16);
        zoom_out_full_button.add (*(manage (new Image (::get_icon("zoom_full")))));
        zoom_out_full_button.signal_clicked().connect (mem_fun(*this, &Editor::temporal_zoom_session));
        ARDOUR_UI::instance()->tooltips().set_tip (zoom_out_full_button, _("Zoom to Session"));
-       
-       zoom_box.pack_start (zoom_out_button, false, false);
-       zoom_box.pack_start (zoom_in_button, false, false);
-       zoom_box.pack_start (zoom_range_clock, false, false);   
-       zoom_box.pack_start (zoom_out_full_button, false, false);
-       
-       ARDOUR_UI::instance()->tooltips().set_tip (zoom_range_clock, _("Current Zoom Range\n(Width of visible area)"));
 
        zoom_focus_selector.set_name ("ZoomFocusSelector");
-       Gtkmm2ext::set_size_request_to_display_given_text (zoom_focus_selector, "Focus Center", 2+FUDGE, 0);
+       Gtkmm2ext::set_size_request_to_display_given_text (zoom_focus_selector, "Center", FUDGE, 0);
        set_popdown_strings (zoom_focus_selector, zoom_focus_strings);
        zoom_focus_selector.signal_changed().connect (mem_fun(*this, &Editor::zoom_focus_selection_done));
        ARDOUR_UI::instance()->tooltips().set_tip (zoom_focus_selector, _("Zoom focus"));
 
-       zoom_box.pack_start (zoom_focus_selector, false, false);
-
+       zoom_box.pack_start (zoom_focus_selector, true, true);
+       zoom_box.pack_start (zoom_out_button, false, false);
+       zoom_box.pack_start (zoom_in_button, false, false);
+       zoom_box.pack_start (zoom_out_full_button, false, false);
 
        /* Edit Cursor / Snap */
 
@@ -2685,7 +2499,7 @@ Editor::setup_toolbar ()
 
        
        hbox->pack_start (snap_box, false, false);
-       hbox->pack_start (zoom_box, false, false); 
+       // hbox->pack_start (zoom_box, false, false); 
        hbox->pack_start (*nudge_box, false, false);
 
        hbox->show_all ();
@@ -2789,6 +2603,8 @@ Editor::map_transport_state ()
        if (session->transport_stopped()) {
                have_pending_keyboard_selection = false;
        }
+
+       update_loop_range_view (true);
 }
 
 /* UNDO/REDO */
@@ -2849,540 +2665,114 @@ Editor::commit_reversible_command ()
        }
 }
 
-bool
-Editor::set_selected_track (TimeAxisView& view, Selection::Operation op, bool no_remove)
+void
+Editor::set_edit_group_solo (Route& route, bool yn)
 {
-       bool commit = false;
-
-       switch (op) {
-       case Selection::Toggle:
-               if (selection->selected (&view)) {
-                       if (!no_remove) {
-                               selection->remove (&view);
-                               commit = true;
-                       }
-               } else {
-                       selection->add (&view);
-                       commit = false;
-               }
-               break;
-
-       case Selection::Add:
-               if (!selection->selected (&view)) {
-                       selection->add (&view);
-                       commit = true;
-               }
-               break;
-
-       case Selection::Set:
-               if (selection->selected (&view) && selection->tracks.size() == 1) {
-                       /* no commit necessary */
-               } 
+       RouteGroup *edit_group;
 
-               selection->set (&view);
-               break;
-               
-       case Selection::Extend:
-               /* not defined yet */
-               break;
+       if ((edit_group = route.edit_group()) != 0) {
+               edit_group->apply (&Route::set_solo, yn, this);
+       } else {
+               route.set_solo (yn, this);
        }
-
-       return commit;
 }
 
-bool
-Editor::set_selected_track_from_click (Selection::Operation op, bool no_remove)
+void
+Editor::set_edit_group_mute (Route& route, bool yn)
 {
-       if (!clicked_trackview) {
-               return false;
-       }
-       
-       return set_selected_track (*clicked_trackview, op, no_remove);
-}
+       RouteGroup *edit_group = 0;
 
-bool
-Editor::set_selected_control_point_from_click (Selection::Operation op, bool no_remove)
-{
-       if (!clicked_control_point) {
-               return false;
+       if ((edit_group == route.edit_group()) != 0) {
+               edit_group->apply (&Route::set_mute, yn, this);
+       } else {
+               route.set_mute (yn, this);
        }
-
-       /* select this point and any others that it represents */
-
-       double y1, y2;
-       nframes_t x1, x2;
-
-       x1 = pixel_to_frame (clicked_control_point->get_x() - 10);
-       x2 = pixel_to_frame (clicked_control_point->get_x() + 10);
-       y1 = clicked_control_point->get_x() - 10;
-       y2 = clicked_control_point->get_y() + 10;
-
-       return select_all_within (x1, x2, y1, y2, op);
 }
-
+               
 void
-Editor::get_relevant_audio_tracks (set<AudioTimeAxisView*>& relevant_tracks)
+Editor::history_changed ()
 {
-       /* step one: get all selected tracks and all tracks in the relevant edit groups */
-
-       for (TrackSelection::iterator ti = selection->tracks.begin(); ti != selection->tracks.end(); ++ti) {
-
-               AudioTimeAxisView* atv = dynamic_cast<AudioTimeAxisView*>(*ti);
+       string label;
 
-               if (!atv) {
-                       continue;
+       if (undo_action && session) {
+               if (session->undo_depth() == 0) {
+                       label = _("Undo");
+               } else {
+                       label = string_compose(_("Undo (%1)"), session->next_undo());
                }
+               undo_action->property_label() = label;
+       }
 
-               RouteGroup* group = atv->route()->edit_group();
-
-               if (group && group->is_active()) {
-                       
-                       /* active group for this track, loop over all tracks and get every member of the group */
-
-                       for (TrackViewList::iterator i = track_views.begin(); i != track_views.end(); ++i) {
-                               
-                               AudioTimeAxisView* tatv;
-                               
-                               if ((tatv = dynamic_cast<AudioTimeAxisView*> (*i)) != 0) {
-                                       
-                                       if (tatv->route()->edit_group() == group) {
-                                               relevant_tracks.insert (tatv);
-                                       }
-                               }
-                       }
+       if (redo_action && session) {
+               if (session->redo_depth() == 0) {
+                       label = _("Redo");
                } else {
-                       relevant_tracks.insert (atv);
+                       label = string_compose(_("Redo (%1)"), session->next_redo());
                }
+               redo_action->property_label() = label;
        }
 }
 
 void
-Editor::mapover_audio_tracks (slot<void,AudioTimeAxisView&,uint32_t> sl)
+Editor::duplicate_dialog (bool dup_region)
 {
-       set<AudioTimeAxisView*> relevant_tracks;
+       if (selection->regions.empty() && (selection->time.length() == 0)) {
+               return;
+       }
+
+       ArdourDialog win ("duplicate dialog");
+       Label  label (_("Duplicate how many times?"));
+       Adjustment adjustment (1.0, 1.0, 1000000.0, 1.0, 5.0);
+       SpinButton spinner (adjustment);
 
-       get_relevant_audio_tracks (relevant_tracks);
+       win.get_vbox()->set_spacing (12);
+       win.get_vbox()->pack_start (label);
 
-       uint32_t sz = relevant_tracks.size();
+       /* dialogs have ::add_action_widget() but that puts the spinner in the wrong
+          place, visually. so do this by hand.
+       */
 
-       for (set<AudioTimeAxisView*>::iterator ati = relevant_tracks.begin(); ati != relevant_tracks.end(); ++ati) {
-               sl (**ati, sz);
-       }
-}
+       win.get_vbox()->pack_start (spinner);
+       spinner.signal_activate().connect (sigc::bind (mem_fun (win, &ArdourDialog::response), RESPONSE_ACCEPT));
 
-void
-Editor::mapped_set_selected_regionview_from_click (RouteTimeAxisView& tv, uint32_t ignored, 
-                                                  RegionView* basis, vector<RegionView*>* all_equivs)
-{
-       Playlist* pl;
-       vector<boost::shared_ptr<Region> > results;
-       RegionView* marv;
-       boost::shared_ptr<Diskstream> ds;
+       label.show ();
+       spinner.show ();
+
+       win.add_button (Stock::OK, RESPONSE_ACCEPT);
+       win.add_button (Stock::CANCEL, RESPONSE_CANCEL);
+
+       win.set_position (WIN_POS_MOUSE);
+
+       spinner.grab_focus ();
 
-       if ((ds = tv.get_diskstream()) == 0) {
-               /* bus */
+       switch (win.run ()) {
+       case RESPONSE_ACCEPT:
+               break;
+       default:
                return;
        }
 
-       if (&tv == &basis->get_time_axis_view()) {
-               /* looking in same track as the original */
-               return;
-       }
-
-       
-       if ((pl = dynamic_cast<Playlist*>(ds->playlist())) != 0) {
-               pl->get_equivalent_regions (basis->region(), results);
-       }
-       
-       for (vector<boost::shared_ptr<Region> >::iterator ir = results.begin(); ir != results.end(); ++ir) {
-               if ((marv = tv.view()->find_view (*ir)) != 0) {
-                       all_equivs->push_back (marv);
-               }
-       }
-}
-
-bool
-Editor::set_selected_regionview_from_click (bool press, Selection::Operation op, bool no_track_remove)
-{
-       vector<RegionView*> all_equivalent_regions;
-       bool commit = false;
-
-       if (!clicked_regionview || !clicked_audio_trackview) {
-               return false;
-       }
-
-       if (op == Selection::Toggle || op == Selection::Set) {
-               
-               mapover_audio_tracks (bind (mem_fun (*this, &Editor::mapped_set_selected_regionview_from_click), 
-                                           clicked_regionview, &all_equivalent_regions));
-               
-               
-               /* add clicked regionview since we skipped all other regions in the same track as the one it was in */
-               
-               all_equivalent_regions.push_back (clicked_regionview);
-               
-               switch (op) {
-               case Selection::Toggle:
-                       
-                       if (clicked_regionview->get_selected()) {
-                               if (press) {
-
-                                       /* whatever was clicked was selected already; do nothing here but allow
-                                          the button release to deselect it
-                                       */
-
-                                       button_release_can_deselect = true;
-
-                               } else {
-
-                                       if (button_release_can_deselect) {
+       float times = adjustment.get_value();
 
-                                               /* just remove this one region, but only on a permitted button release */
-
-                                               selection->remove (clicked_regionview);
-                                               commit = true;
-
-                                               /* no more deselect action on button release till a new press
-                                                  finds an already selected object.
-                                               */
-
-                                               button_release_can_deselect = false;
-                                       }
-                               } 
-
-                       } else {
-
-                               if (press) {
-                                       /* add all the equivalent regions, but only on button press */
-                                       
-                                       if (!all_equivalent_regions.empty()) {
-                                               commit = true;
-                                       }
-                                       
-                                       for (vector<RegionView*>::iterator i = all_equivalent_regions.begin(); i != all_equivalent_regions.end(); ++i) {
-                                               selection->add (*i);
-                                       }
-                               } 
-                       }
-                       break;
-                       
-               case Selection::Set:
-                       if (!clicked_regionview->get_selected()) {
-                               selection->set (all_equivalent_regions);
-                               commit = true;
-                       } else {
-                               /* no commit necessary: clicked on an already selected region */
-                               goto out;
-                       }
-                       break;
-
-               default:
-                       /* silly compiler */
-                       break;
-               }
-
-       } else if (op == Selection::Extend) {
-
-               list<Selectable*> results;
-               nframes_t last_frame;
-               nframes_t first_frame;
-
-               /* 1. find the last selected regionview in the track that was clicked in */
-
-               last_frame = 0;
-               first_frame = max_frames;
-
-               for (RegionSelection::iterator x = selection->regions.begin(); x != selection->regions.end(); ++x) {
-                       if (&(*x)->get_time_axis_view() == &clicked_regionview->get_time_axis_view()) {
-
-                               if ((*x)->region()->last_frame() > last_frame) {
-                                       last_frame = (*x)->region()->last_frame();
-                               }
-
-                               if ((*x)->region()->first_frame() < first_frame) {
-                                       first_frame = (*x)->region()->first_frame();
-                               }
-                       }
-               }
-
-               /* 2. figure out the boundaries for our search for new objects */
-
-               switch (clicked_regionview->region()->coverage (first_frame, last_frame)) {
-               case OverlapNone:
-                       if (last_frame < clicked_regionview->region()->first_frame()) {
-                               first_frame = last_frame;
-                               last_frame = clicked_regionview->region()->last_frame();
-                       } else {
-                               last_frame = first_frame;
-                               first_frame = clicked_regionview->region()->first_frame();
-                       }
-                       break;
-
-               case OverlapExternal:
-                       if (last_frame < clicked_regionview->region()->first_frame()) {
-                               first_frame = last_frame;
-                               last_frame = clicked_regionview->region()->last_frame();
-                       } else {
-                               last_frame = first_frame;
-                               first_frame = clicked_regionview->region()->first_frame();
-                       }
-                       break;
-
-               case OverlapInternal:
-                       if (last_frame < clicked_regionview->region()->first_frame()) {
-                               first_frame = last_frame;
-                               last_frame = clicked_regionview->region()->last_frame();
-                       } else {
-                               last_frame = first_frame;
-                               first_frame = clicked_regionview->region()->first_frame();
-                       }
-                       break;
-
-               case OverlapStart:
-               case OverlapEnd:
-                       /* nothing to do except add clicked region to selection, since it
-                          overlaps with the existing selection in this track.
-                       */
-                       break;
-               }
-
-               /* 2. find all selectable objects (regionviews in this case) between that one and the end of the
-                     one that was clicked.
-               */
-
-               set<AudioTimeAxisView*> relevant_tracks;
-               
-               get_relevant_audio_tracks (relevant_tracks);
-               
-               for (set<AudioTimeAxisView*>::iterator t = relevant_tracks.begin(); t != relevant_tracks.end(); ++t) {
-                       (*t)->get_selectables (first_frame, last_frame, -1.0, -1.0, results);
-               }
-               
-               /* 3. convert to a vector of audio regions */
-
-               vector<RegionView*> regions;
-               
-               for (list<Selectable*>::iterator x = results.begin(); x != results.end(); ++x) {
-                       RegionView* arv;
-
-                       if ((arv = dynamic_cast<RegionView*>(*x)) != 0) {
-                               regions.push_back (arv);
-                       }
-               }
-
-               if (!regions.empty()) {
-                       selection->add (regions);
-                       commit = true;
-               }
-       }
-
-  out:
-       return commit;
-}
-
-void
-Editor::set_selected_regionview_from_region_list (boost::shared_ptr<Region> region, Selection::Operation op)
-{
-       vector<RegionView*> all_equivalent_regions;
-
-       for (TrackViewList::iterator i = track_views.begin(); i != track_views.end(); ++i) {
-               
-               RouteTimeAxisView* tatv;
-               
-               if ((tatv = dynamic_cast<RouteTimeAxisView*> (*i)) != 0) {
-                       
-                       Playlist* pl;
-                       vector<boost::shared_ptr<Region> > results;
-                       RegionView* marv;
-                       boost::shared_ptr<Diskstream> ds;
-                       
-                       if ((ds = tatv->get_diskstream()) == 0) {
-                               /* bus */
-                               continue;
-                       }
-
-                       if ((pl = dynamic_cast<Playlist*>(ds->playlist())) != 0) {
-                               pl->get_region_list_equivalent_regions (region, results);
-                       }
-                       
-                       for (vector<boost::shared_ptr<Region> >::iterator ir = results.begin(); ir != results.end(); ++ir) {
-                               if ((marv = tatv->view()->find_view (*ir)) != 0) {
-                                       all_equivalent_regions.push_back (marv);
-                               }
-                       }
-                       
-               }
-       }
-       
-       begin_reversible_command (_("set selected regions"));
-       
-       switch (op) {
-       case Selection::Toggle:
-               /* XXX this is not correct */
-               selection->toggle (all_equivalent_regions);
-               break;
-       case Selection::Set:
-               selection->set (all_equivalent_regions);
-               break;
-       case Selection::Extend:
-               selection->add (all_equivalent_regions);
-               break;
-       case Selection::Add:
-               selection->add (all_equivalent_regions);
-               break;
-       }
-
-       commit_reversible_command () ;
-}
-
-bool
-Editor::set_selected_regionview_from_map_event (GdkEventAny* ev, StreamView* sv, boost::weak_ptr<Region> weak_r)
-{
-       RegionView* rv;
-       boost::shared_ptr<Region> r (weak_r.lock());
-
-       if (!r) {
-               return true;
-       }
-
-       boost::shared_ptr<AudioRegion> ar;
-
-       if ((ar = boost::dynamic_pointer_cast<AudioRegion> (r)) == 0) {
-               return true;
-       }
-
-       if ((rv = sv->find_view (ar)) == 0) {
-               return true;
-       }
-
-       /* don't reset the selection if its something other than 
-          a single other region.
-       */
-
-       if (selection->regions.size() > 1) {
-               return true;
-       }
-       
-       begin_reversible_command (_("set selected regions"));
-       
-       selection->set (rv);
-
-       commit_reversible_command () ;
-
-       return true;
-}
-
-void
-Editor::set_edit_group_solo (Route& route, bool yn)
-{
-       RouteGroup *edit_group;
-
-       if ((edit_group = route.edit_group()) != 0) {
-               edit_group->apply (&Route::set_solo, yn, this);
-       } else {
-               route.set_solo (yn, this);
-       }
-}
-
-void
-Editor::set_edit_group_mute (Route& route, bool yn)
-{
-       RouteGroup *edit_group = 0;
-
-       if ((edit_group == route.edit_group()) != 0) {
-               edit_group->apply (&Route::set_mute, yn, this);
-       } else {
-               route.set_mute (yn, this);
-       }
-}
-               
-void
-Editor::history_changed ()
-{
-       string label;
-
-       if (undo_action && session) {
-               if (session->undo_depth() == 0) {
-                       label = _("Undo");
-               } else {
-                       label = string_compose(_("Undo (%1)"), session->next_undo());
-               }
-               undo_action->property_label() = label;
-       }
-
-       if (redo_action && session) {
-               if (session->redo_depth() == 0) {
-                       label = _("Redo");
-               } else {
-                       label = string_compose(_("Redo (%1)"), session->next_redo());
-               }
-               redo_action->property_label() = label;
-       }
-}
-
-void
-Editor::duplicate_dialog (bool dup_region)
-{
-       if (dup_region) {
-               if (clicked_regionview == 0) {
-                       return;
-               }
+       if (!selection->regions.empty()) {
+               duplicate_some_regions (selection->regions, times);
        } else {
-               if (selection->time.length() == 0) {
-                       return;
-               }
-       }
-
-       ArdourDialog win ("duplicate dialog");
-       Entry  entry;
-       Label  label (_("Duplicate how many times?"));
-
-       win.get_vbox()->pack_start (label);
-       win.add_action_widget (entry, RESPONSE_ACCEPT);
-       win.add_button (Stock::OK, RESPONSE_ACCEPT);
-       win.add_button (Stock::CANCEL, RESPONSE_CANCEL);
-
-       win.set_position (WIN_POS_MOUSE);
-
-       entry.set_text ("1");
-       set_size_request_to_display_given_text (entry, X_("12345678"), 20, 15);
-       entry.select_region (0, entry.get_text_length());
-       entry.grab_focus ();
-
-
-       switch (win.run ()) {
-       case RESPONSE_ACCEPT:
-               break;
-       default:
-               return;
-       }
-
-       string text = entry.get_text();
-       float times;
-
-       if (sscanf (text.c_str(), "%f", &times) == 1) {
-               if (dup_region) {
-                       RegionSelection regions;
-                       regions.add (clicked_regionview);
-                       duplicate_some_regions (regions, times);
-               } else {
-                       duplicate_selection (times);
-               }
+               duplicate_selection (times);
        }
 }
 
 void
 Editor::show_verbose_canvas_cursor ()
 {
-        verbose_canvas_cursor->raise_to_top();
-        verbose_canvas_cursor->show();
+       verbose_canvas_cursor->raise_to_top();
+       verbose_canvas_cursor->show();
        verbose_cursor_visible = true;
 }
 
 void
 Editor::hide_verbose_canvas_cursor ()
 {
-        verbose_canvas_cursor->hide();
+       verbose_canvas_cursor->hide();
        verbose_cursor_visible = false;
 }
 
@@ -3507,9 +2897,9 @@ Editor::zoom_focus_selection_done ()
                focus_type = ZoomFocusRight;
        } else if (choice == _("Center")) {
                focus_type = ZoomFocusCenter;
-       } else if (choice == _("Playhead")) {
+       } else if (choice == _("Play")) {
                focus_type = ZoomFocusPlayhead;
-       } else if (choice == _("Edit Cursor")) {
+       } else if (choice == _("Edit")) {
                focus_type = ZoomFocusEdit;
        } 
        
@@ -3524,87 +2914,21 @@ gint
 Editor::edit_controls_button_release (GdkEventButton* ev)
 {
        if (Keyboard::is_context_menu_event (ev)) {
-               ARDOUR_UI::instance()->add_route ();
+               ARDOUR_UI::instance()->add_route (this);
        }
        return TRUE;
 }
 
-void
-Editor::track_selection_changed ()
-{
-       switch (selection->tracks.size()){
-       case 0:
-               break;
-       default:
-               set_selected_mixer_strip (*(selection->tracks.front()));
-               break;
-       }
-
-       for (TrackViewList::iterator i = track_views.begin(); i != track_views.end(); ++i) {
-               (*i)->set_selected (false);
-               if (mouse_mode == MouseRange) {
-                       (*i)->hide_selection ();
-               }
-       }
-
-       for (TrackSelection::iterator i = selection->tracks.begin(); i != selection->tracks.end(); ++i) {
-               (*i)->set_selected (true);
-               if (mouse_mode == MouseRange) {
-                       (*i)->show_selection (selection->time);
-               }
-       }
-}
-
-void
-Editor::time_selection_changed ()
-{
-       for (TrackViewList::iterator i = track_views.begin(); i != track_views.end(); ++i) {
-               (*i)->hide_selection ();
-       }
-
-       if (selection->tracks.empty()) {
-               for (TrackViewList::iterator i = track_views.begin(); i != track_views.end(); ++i) {
-                       (*i)->show_selection (selection->time);
-               }
-       } else {
-               for (TrackSelection::iterator i = selection->tracks.begin(); i != selection->tracks.end(); ++i) {
-                       (*i)->show_selection (selection->time);
-               }
-       }
-
-       if (selection->time.empty()) {
-               ActionManager::set_sensitive (ActionManager::time_selection_sensitive_actions, false);
-       } else {
-               ActionManager::set_sensitive (ActionManager::time_selection_sensitive_actions, true);
-       }
-}
-
-void
-Editor::region_selection_changed ()
-{
-       for (TrackViewList::iterator i = track_views.begin(); i != track_views.end(); ++i) {
-               (*i)->set_selected_regionviews (selection->regions);
-       }
-}
-
-void
-Editor::point_selection_changed ()
-{
-       for (TrackViewList::iterator i = track_views.begin(); i != track_views.end(); ++i) {
-               (*i)->set_selected_points (selection->points);
-       }
-}
-
 gint
 Editor::mouse_select_button_release (GdkEventButton* ev)
 {
        /* this handles just right-clicks */
 
        if (ev->button != 3) {
-               return FALSE;
+               return false;
        }
 
-       return TRUE;
+       return true;
 }
 
 Editor::TrackViewList *
@@ -3739,7 +3063,6 @@ Editor::set_show_measures (bool yn)
                if ((_show_measures = yn) == true) {
                        draw_measures ();
                }
-               DisplayControlChanged (ShowMeasures);
                instant_save ();
        }
 }
@@ -3762,27 +3085,38 @@ Editor::set_follow_playhead (bool yn)
                        /* catch up */
                        update_current_screen ();
                }
-               DisplayControlChanged (FollowPlayhead);
                instant_save ();
        }
 }
 
 void
-Editor::toggle_xfade_active (Crossfade* xfade)
+Editor::toggle_xfade_active (boost::weak_ptr<Crossfade> wxfade)
 {
-       xfade->set_active (!xfade->active());
+       boost::shared_ptr<Crossfade> xfade (wxfade.lock());
+       if (xfade) {
+               xfade->set_active (!xfade->active());
+       }
 }
 
 void
-Editor::toggle_xfade_length (Crossfade* xfade)
+Editor::toggle_xfade_length (boost::weak_ptr<Crossfade> wxfade)
 {
-       xfade->set_follow_overlap (!xfade->following_overlap());
+       boost::shared_ptr<Crossfade> xfade (wxfade.lock());
+       if (xfade) {
+               xfade->set_follow_overlap (!xfade->following_overlap());
+       }
 }
 
 void
-Editor::edit_xfade (Crossfade* xfade)
+Editor::edit_xfade (boost::weak_ptr<Crossfade> wxfade)
 {
-       CrossfadeEditor cew (*session, *xfade, xfade->fade_in().get_min_y(), 1.0);
+       boost::shared_ptr<Crossfade> xfade (wxfade.lock());
+
+       if (!xfade) {
+               return;
+       }
+
+       CrossfadeEditor cew (*session, xfade, xfade->fade_in().get_min_y(), 1.0);
                
        ensure_float (cew);
        
@@ -3822,19 +3156,21 @@ Editor::end_location_changed (Location* location)
 }
 
 int
-Editor::playlist_deletion_dialog (Playlist* pl)
+Editor::playlist_deletion_dialog (boost::shared_ptr<Playlist> pl)
 {
        ArdourDialog dialog ("playlist deletion dialog");
        Label  label (string_compose (_("Playlist %1 is currently unused.\n"
-                                "If left alone, no audio files used by it will be cleaned.\n"
-                                "If deleted, audio files used by it alone by will cleaned."),
-                              pl->name()));
-
+                                       "If left alone, no audio files used by it will be cleaned.\n"
+                                       "If deleted, audio files used by it alone by will cleaned."),
+                                     pl->name()));
+       
        dialog.set_position (WIN_POS_CENTER);
        dialog.get_vbox()->pack_start (label);
 
+       label.show ();
+
        dialog.add_button (_("Delete playlist"), RESPONSE_ACCEPT);
-       dialog.add_button (_("Keep playlist"), RESPONSE_CANCEL);
+       dialog.add_button (_("Keep playlist"), RESPONSE_REJECT);
        dialog.add_button (_("Cancel"), RESPONSE_CANCEL);
 
        switch (dialog.run ()) {
@@ -3918,6 +3254,9 @@ Editor::control_layout_scroll (GdkEventScroll* ev)
        return false;
 }
 
+
+/** A new snapshot has been selected.
+ */
 void
 Editor::snapshot_display_selection_changed ()
 {
@@ -3942,7 +3281,87 @@ Editor::snapshot_display_selection_changed ()
 bool
 Editor::snapshot_display_button_press (GdkEventButton* ev)
 {
-        return false;
+       if (ev->button == 3) {
+               /* Right-click on the snapshot list. Work out which snapshot it
+                  was over. */
+               Gtk::TreeModel::Path path;
+               Gtk::TreeViewColumn* col;
+               int cx;
+               int cy;
+               snapshot_display.get_path_at_pos ((int) ev->x, (int) ev->y, path, col, cx, cy);
+               Gtk::TreeModel::iterator iter = snapshot_display_model->get_iter (path);
+               if (iter) {
+                       Gtk::TreeModel::Row row = *iter;
+                       popup_snapshot_context_menu (ev->button, ev->time, row[snapshot_display_columns.real_name]);
+               }
+               return true;
+       }
+
+       return false;
+}
+
+
+/** Pop up the snapshot display context menu.
+ * @param button Button used to open the menu.
+ * @param time Menu open time.
+ * @snapshot_name Name of the snapshot that the menu click was over.
+ */
+
+void
+Editor::popup_snapshot_context_menu (int button, int32_t time, Glib::ustring snapshot_name)
+{
+       using namespace Menu_Helpers;
+
+       MenuList& items (snapshot_context_menu.items());
+       items.clear ();
+
+       const bool modification_allowed = (session->snap_name() != snapshot_name && session->name() != snapshot_name);
+
+       add_item_with_sensitivity (items, MenuElem (_("Remove"), bind (mem_fun (*this, &Editor::remove_snapshot), snapshot_name)), modification_allowed);
+
+       add_item_with_sensitivity (items, MenuElem (_("Rename"), bind (mem_fun (*this, &Editor::rename_snapshot), snapshot_name)), modification_allowed);
+
+       snapshot_context_menu.popup (button, time);
+}
+
+void
+Editor::rename_snapshot (Glib::ustring old_name)
+{
+       ArdourPrompter prompter(true);
+
+       string new_name;
+
+       prompter.set_name ("Prompter");
+       prompter.add_button (Gtk::Stock::SAVE, Gtk::RESPONSE_ACCEPT);
+       prompter.set_prompt (_("New name of snapshot"));
+       prompter.set_initial_text (old_name);
+       
+       if (prompter.run() == RESPONSE_ACCEPT) {
+               prompter.get_result (new_name);
+               if (new_name.length()) {
+                       session->rename_state (old_name, new_name);
+                       redisplay_snapshots ();
+               }
+       }
+}
+
+
+void
+Editor::remove_snapshot (Glib::ustring name)
+{
+       vector<string> choices;
+
+       std::string prompt  = string_compose (_("Do you really want to remove snapshot \"%1\" ?\n(cannot be undone)"), name);
+
+       choices.push_back (_("No, do nothing."));
+       choices.push_back (_("Yes, remove it."));
+
+       Gtkmm2ext::Choice prompter (prompt, choices);
+
+       if (prompter.run () == 1) {
+               session->remove_state (name);
+               redisplay_snapshots ();
+       }
 }
 
 void
@@ -3964,15 +3383,16 @@ Editor::redisplay_snapshots ()
                string statename = *(*i);
                TreeModel::Row row = *(snapshot_display_model->append());
                
-               // we don't have a way of changing the rendering in just one TreeView 
-               // cell so just put an asterisk on each side of the name for now.
+               /* this lingers on in case we ever want to change the visible
+                  name of the snapshot.
+               */
+               
                string display_name;
+               display_name = statename;
+
                if (statename == session->snap_name()) {
-                       display_name = "*"+statename+"*";
                        snapshot_display.get_selection()->select(row);
-               } else {
-                       display_name = statename;
-               }
+               } 
                
                row[snapshot_display_columns.visible_name] = display_name;
                row[snapshot_display_columns.real_name] = statename;
@@ -4039,7 +3459,7 @@ void
 Editor::new_playlists ()
 {
        begin_reversible_command (_("new playlists"));
-       mapover_audio_tracks (mem_fun (*this, &Editor::mapped_use_new_playlist));
+       mapover_tracks (mem_fun (*this, &Editor::mapped_use_new_playlist));
        commit_reversible_command ();
 }
 
@@ -4047,7 +3467,7 @@ void
 Editor::copy_playlists ()
 {
        begin_reversible_command (_("copy playlists"));
-       mapover_audio_tracks (mem_fun (*this, &Editor::mapped_use_copy_playlist));
+       mapover_tracks (mem_fun (*this, &Editor::mapped_use_copy_playlist));
        commit_reversible_command ();
 }
 
@@ -4055,24 +3475,24 @@ void
 Editor::clear_playlists ()
 {
        begin_reversible_command (_("clear playlists"));
-       mapover_audio_tracks (mem_fun (*this, &Editor::mapped_clear_playlist));
+       mapover_tracks (mem_fun (*this, &Editor::mapped_clear_playlist));
        commit_reversible_command ();
 }
 
 void 
-Editor::mapped_use_new_playlist (AudioTimeAxisView& atv, uint32_t sz)
+Editor::mapped_use_new_playlist (RouteTimeAxisView& atv, uint32_t sz)
 {
        atv.use_new_playlist (sz > 1 ? false : true);
 }
 
 void
-Editor::mapped_use_copy_playlist (AudioTimeAxisView& atv, uint32_t sz)
+Editor::mapped_use_copy_playlist (RouteTimeAxisView& atv, uint32_t sz)
 {
        atv.use_copy_playlist (sz > 1 ? false : true);
 }
 
 void 
-Editor::mapped_clear_playlist (AudioTimeAxisView& atv, uint32_t sz)
+Editor::mapped_clear_playlist (RouteTimeAxisView& atv, uint32_t sz)
 {
        atv.clear_playlist ();
 }
@@ -4083,3 +3503,160 @@ Editor::on_key_press_event (GdkEventKey* ev)
        return key_press_focus_accelerator_handler (*this, ev);
 }
 
+void
+Editor::reset_x_origin (nframes_t frame)
+{
+       queue_visual_change (frame);
+}
+
+void
+Editor::reset_zoom (double fpu)
+{
+       queue_visual_change (fpu);
+}
+
+void
+Editor::reposition_and_zoom (nframes_t frame, double fpu)
+{
+       reset_x_origin (frame);
+       reset_zoom (fpu);
+}
+
+void
+Editor::set_frames_per_unit (double fpu)
+{
+       nframes_t frames;
+
+       /* this is the core function that controls the zoom level of the canvas. it is called
+          whenever one or more calls are made to reset_zoom(). it executes in an idle handler.
+       */
+
+       if (fpu == frames_per_unit) {
+               return;
+       }
+
+       if (fpu < 2.0) {
+               fpu = 2.0;
+       }
+
+       // convert fpu to frame count
+
+       frames = (nframes_t) floor (fpu * canvas_width);
+       
+       /* don't allow zooms that fit more than the maximum number
+          of frames into an 800 pixel wide space.
+       */
+
+       if (max_frames / fpu < 800.0) {
+               return;
+       }
+
+       if (fpu == frames_per_unit) {
+               return;
+       }
+
+       frames_per_unit = fpu;
+
+       if (frames != zoom_range_clock.current_duration()) {
+               zoom_range_clock.set (frames);
+       }
+
+       if (mouse_mode == MouseRange && selection->time.start () != selection->time.end_frame ()) {
+               if (!selection->tracks.empty()) {
+                       for (TrackSelection::iterator i = selection->tracks.begin(); i != selection->tracks.end(); ++i) {
+                               (*i)->reshow_selection (selection->time);
+                       }
+               } else {
+                       for (TrackViewList::iterator i = track_views.begin(); i != track_views.end(); ++i) {
+                               (*i)->reshow_selection (selection->time);
+                       }
+               }
+       }
+
+       ZoomChanged (); /* EMIT_SIGNAL */
+
+       reset_hscrollbar_stepping ();
+       reset_scrolling_region ();
+       
+       if (edit_cursor) edit_cursor->set_position (edit_cursor->current_frame);
+       if (playhead_cursor) playhead_cursor->set_position (playhead_cursor->current_frame);
+
+       instant_save ();
+}
+
+void
+Editor::queue_visual_change (nframes_t where)
+{
+       pending_visual_change.pending = VisualChange::Type (pending_visual_change.pending | VisualChange::TimeOrigin);
+       pending_visual_change.time_origin = where;
+
+       if (pending_visual_change.idle_handler_id < 0) {
+               pending_visual_change.idle_handler_id = g_idle_add (_idle_visual_changer, this);
+       }
+}
+
+void
+Editor::queue_visual_change (double fpu)
+{
+       pending_visual_change.pending = VisualChange::Type (pending_visual_change.pending | VisualChange::ZoomLevel);
+       pending_visual_change.frames_per_unit = fpu;
+
+       if (pending_visual_change.idle_handler_id < 0) {
+               pending_visual_change.idle_handler_id = g_idle_add_full (G_PRIORITY_HIGH_IDLE, _idle_visual_changer, this, 0);
+       }
+}
+
+int
+Editor::_idle_visual_changer (void* arg)
+{
+       return static_cast<Editor*>(arg)->idle_visual_changer ();
+}
+
+int
+Editor::idle_visual_changer ()
+{
+       VisualChange::Type p = pending_visual_change.pending;
+
+       pending_visual_change.pending = (VisualChange::Type) 0;
+       pending_visual_change.idle_handler_id = -1;
+       
+       if (p & VisualChange::ZoomLevel) {
+               set_frames_per_unit (pending_visual_change.frames_per_unit);
+       }
+
+       if (p & VisualChange::TimeOrigin) {
+               if (pending_visual_change.time_origin != leftmost_frame) {
+                       horizontal_adjustment.set_value (pending_visual_change.time_origin/frames_per_unit);
+                       /* the signal handler will do the rest */
+               } else {
+                       update_fixed_rulers();
+                       redisplay_tempo (true);
+               }
+       }
+
+       return 0; /* this is always a one-shot call */
+}
+
+struct EditorOrderTimeAxisSorter {
+    bool operator() (const TimeAxisView* a, const TimeAxisView* b) const {
+           return a->order < b->order;
+    }
+};
+       
+void
+Editor::sort_track_selection ()
+{
+       EditorOrderTimeAxisSorter cmp;
+       selection->tracks.sort (cmp);
+}
+
+nframes_t
+Editor::edit_cursor_position(bool sync)
+{
+       if (sync && edit_cursor->current_frame != edit_cursor_clock.current_time()) {
+               edit_cursor_clock.set(edit_cursor->current_frame, true);
+       }
+
+       return edit_cursor->current_frame;
+}
+