use new syntax for connecting to backend signals that enforces explicit connection...
[ardour.git] / gtk2_ardour / editor.cc
index 346df2064d5cf4d64994f18c8f77a25bc318106a..57d1ef092220f2d70594b1a60660452788fc9e23 100644 (file)
@@ -1,5 +1,5 @@
 /*
-    Copyright (C) 2000-2007 Paul Davis 
+    Copyright (C) 2000-2009 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
 
 /* Note: public Editor methods are documented in public_editor.h */
 
+#define __STDC_LIMIT_MACROS 1
+#include <stdint.h>
 #include <unistd.h>
 #include <cstdlib>
 #include <cmath>
 #include <string>
 #include <algorithm>
+#include <map>
+
+#include "ardour_ui.h"
+/*
+ * ardour_ui.h include was moved to the top of the list
+ * due to a conflicting definition of 'Style' between
+ * Apple's MacTypes.h and BarController.
+ */
 
 #include <boost/none.hpp>
 
@@ -33,6 +43,7 @@
 #include "pbd/error.h"
 #include "pbd/enumwriter.h"
 #include "pbd/memento_command.h"
+#include "pbd/unknown_type.h"
 
 #include <glibmm/miscutils.h>
 #include <gtkmm/image.h>
@@ -45,6 +56,7 @@
 #include <gtkmm2ext/utils.h>
 #include <gtkmm2ext/window_title.h>
 #include <gtkmm2ext/choice.h>
+#include <gtkmm2ext/cell_renderer_pixbuf_toggle.h>
 
 #include "ardour/audio_diskstream.h"
 #include "ardour/audio_track.h"
 #include "ardour/session_state_utils.h"
 #include "ardour/tempo.h"
 #include "ardour/utils.h"
+#include "ardour/session_playlists.h"
 
 #include "control_protocol/control_protocol.h"
 
-#include "ardour_ui.h"
 #include "editor.h"
 #include "keyboard.h"
 #include "marker.h"
@@ -76,6 +88,7 @@
 #include "audio_time_axis.h"
 #include "utils.h"
 #include "crossfade_view.h"
+#include "canvas-noevent-text.h"
 #include "editing.h"
 #include "public_editor.h"
 #include "crossfade_edit.h"
 #include "analysis_window.h"
 #include "bundle_manager.h"
 #include "global_port_matrix.h"
+#include "editor_drag.h"
+#include "editor_group_tabs.h"
+#include "automation_time_axis.h"
+#include "editor_routes.h"
+#include "midi_time_axis.h"
+#include "mixer_strip.h"
+#include "editor_route_groups.h"
+#include "editor_regions.h"
+#include "editor_locations.h"
+#include "editor_snapshots.h"
 
 #include "i18n.h"
 
 #endif
 
 using namespace std;
-using namespace sigc;
 using namespace ARDOUR;
 using namespace PBD;
 using namespace Gtk;
@@ -108,6 +130,7 @@ using namespace Editing;
 
 using PBD::internationalize;
 using PBD::atoi;
+using Gtkmm2ext::Keyboard;
 
 const double Editor::timebar_height = 15.0;
 
@@ -115,9 +138,9 @@ const double Editor::timebar_height = 15.0;
 
 static const gchar *_snap_type_strings[] = {
        N_("CD Frames"),
-       N_("SMPTE Frames"),
-       N_("SMPTE Seconds"),
-       N_("SMPTE Minutes"),
+       N_("Timecode Frames"),
+       N_("Timecode Seconds"),
+       N_("Timecode Minutes"),
        N_("Seconds"),
        N_("Minutes"),
        N_("Beats/32"),
@@ -155,7 +178,7 @@ static const gchar *_zoom_focus_strings[] = {
        N_("Center"),
        N_("Playhead"),
        N_("Mouse"),
-       N_("Active Mark"),
+       N_("Edit point"),
        0
 };
 
@@ -196,60 +219,47 @@ show_me_the_size (Requisition* r, const char* what)
        cerr << "size of " << what << " = " << r->width << " x " << r->height << endl;
 }
 
-void
-DragInfo::clear_copied_locations ()
-{
-       for (list<Location*>::iterator i = copied_locations.begin(); i != copied_locations.end(); ++i) {
-               delete *i;
-       }
-       copied_locations.clear ();
-}
-
 Editor::Editor ()
-       : 
          /* time display buttons */
-
-         minsec_label (_("Mins:Secs")),
-         bbt_label (_("Bars:Beats")),
-         smpte_label (_("Timecode")),
-         frame_label (_("Samples")),
-         tempo_label (_("Tempo")),
-         meter_label (_("Meter")),
-         mark_label (_("Location Markers")),
-         range_mark_label (_("Range Markers")),
-         transport_mark_label (_("Loop/Punch Ranges")),
-         cd_mark_label (_("CD Markers")),
-         edit_packer (3, 4, true),
+       : minsec_label (_("Mins:Secs"))
+       , bbt_label (_("Bars:Beats"))
+       , timecode_label (_("Timecode"))
+       , frame_label (_("Samples"))
+       , tempo_label (_("Tempo"))
+       , meter_label (_("Meter"))
+       , mark_label (_("Location Markers"))
+       , range_mark_label (_("Range Markers"))
+       , transport_mark_label (_("Loop/Punch Ranges"))
+       , cd_mark_label (_("CD Markers"))
+       , edit_packer (4, 4, true)
 
          /* the values here don't matter: layout widgets
             reset them as needed.
          */
 
-         vertical_adjustment (0.0, 0.0, 10.0, 400.0),
-         horizontal_adjustment (0.0, 0.0, 20.0, 1200.0),
+       , vertical_adjustment (0.0, 0.0, 10.0, 400.0)
+       , horizontal_adjustment (0.0, 0.0, 20.0, 1200.0)
 
          /* tool bar related */
 
-         edit_point_clock (X_("editpoint"), false, X_("EditPointClock"), 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")),
+       , zoom_range_clock (X_("zoomrange"), false, X_("ZoomRangeClock"), true, false, true)
+
+       , toolbar_selection_clock_table (2,3)
 
-         midi_panic_button (_("Panic")),
-         midi_tools_tearoff (0),
+       , automation_mode_button (_("mode"))
+       , global_automation_button (_("automation"))
+
+       , midi_panic_button (_("Panic"))
 
 #ifdef WITH_CMT
-         image_socket_listener(0),
+       , image_socket_listener(0)
 #endif
 
          /* nudge */
 
-         nudge_clock (X_("nudge"), false, X_("NudgeClock"), true, true),
-         meters_running(false),
-         _pending_locate_request (false)
+       , nudge_clock (X_("nudge"), false, X_("NudgeClock"), true, false, true)
+       , meters_running(false)
+       , _pending_locate_request (false)
 
 {
        constructed = false;
@@ -258,7 +268,6 @@ Editor::Editor ()
 
        PublicEditor::_instance = this;
 
-       session = 0;
        _have_idled = false;
 
        selection = new Selection (this);
@@ -270,11 +279,11 @@ Editor::Editor ()
        clicked_crossfadeview = 0;
        clicked_control_point = 0;
        last_update_frame = 0;
-       drag_info.item = 0;
+       _drag = 0;
        current_mixer_strip = 0;
        current_bbt_points = 0;
        tempo_lines = 0;
-       
+
        snap_type_strings =  I18N (_snap_type_strings);
        snap_mode_strings =  I18N (_snap_mode_strings);
        zoom_focus_strings = I18N (_zoom_focus_strings);
@@ -282,11 +291,11 @@ Editor::Editor ()
 #ifdef USE_RUBBERBAND
        rb_opt_strings = I18N (_rb_opt_strings);
 #endif
-       
+
        snap_threshold = 5.0;
        bbt_beat_subdivision = 4;
-       canvas_width = 0;
-       canvas_height = 0;
+       _canvas_width = 0;
+       _canvas_height = 0;
        last_autoscroll_x = 0;
        last_autoscroll_y = 0;
        autoscroll_active = false;
@@ -298,28 +307,18 @@ Editor::Editor ()
 
        current_interthread_info = 0;
        _show_measures = true;
-       _show_waveforms = true;
        _show_waveforms_recording = true;
-       first_action_message = 0;
        show_gain_after_trim = false;
-       route_redisplay_does_not_sync_order_keys = false;
-       route_redisplay_does_not_reset_order_keys = false;
-       no_route_list_redisplay = false;
        verbose_cursor_on = true;
        route_removal = false;
-       show_automatic_regions_in_region_list = true;
        last_item_entered = 0;
        last_item_entered_n = 0;
 
-       region_list_sort_type = (Editing::RegionListSortType) 0;
        have_pending_keyboard_selection = false;
        _follow_playhead = true;
        _xfade_visibility = true;
        editor_ruler_menu = 0;
        no_ruler_shown_update = false;
-       edit_group_list_menu = 0;
-       route_list_menu = 0;
-       region_list_menu = 0;
        marker_menu = 0;
        start_end_marker_menu = 0;
        range_marker_menu = 0;
@@ -333,8 +332,6 @@ Editor::Editor ()
        region_edit_menu_split_item = 0;
        temp_location = 0;
        leftmost_frame = 0;
-       ignore_mouse_mode_toggle = false;
-       ignore_midi_edit_mode_toggle = false;
        current_stepping_trackview = 0;
        entered_track = 0;
        entered_regionview = 0;
@@ -342,28 +339,20 @@ Editor::Editor ()
        clear_entered_track = false;
        _new_regionviews_show_envelope = false;
        current_timefx = 0;
-       in_edit_group_row_change = false;
        playhead_cursor = 0;
        button_release_can_deselect = true;
        _dragging_playhead = false;
        _dragging_edit_point = false;
-       _dragging_hscrollbar = false;
        select_new_marker = false;
-       zoomed_to_region = false;
        rhythm_ferret = 0;
        _bundle_manager = 0;
-        for (ARDOUR::DataType::iterator i = ARDOUR::DataType::begin(); i != ARDOUR::DataType::end(); ++i) {
+       for (ARDOUR::DataType::iterator i = ARDOUR::DataType::begin(); i != ARDOUR::DataType::end(); ++i) {
                _global_port_matrix[*i] = 0;
        }
        allow_vertical_scroll = false;
        no_save_visual = false;
-       need_resize_line = false;
-       resize_line_y = 0;
-       old_resize_line_y = -1;
-       no_region_list_redisplay = false;
        resize_idle_id = -1;
 
-       _scrubbing = false;
        scrubbing_direction = 0;
 
        sfbrowser = 0;
@@ -374,18 +363,15 @@ Editor::Editor ()
        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_midi_edit_mode (MidiEditPencil, true);
        _edit_point = EditAtMouse;
-       set_mouse_mode (MouseObject, true);
+       _internal_editing = false;
+       current_canvas_cursor = 0;
 
        frames_per_unit = 2048; /* too early to use reset_zoom () */
-       reset_hscrollbar_stepping ();
-       
+
        zoom_focus = ZoomFocusLeft;
        set_zoom_focus (ZoomFocusLeft);
-       zoom_range_clock.ValueChanged.connect (mem_fun(*this, &Editor::zoom_adjustment_changed));
+       zoom_range_clock.ValueChanged.connect (sigc::mem_fun(*this, &Editor::zoom_adjustment_changed));
 
        bbt_label.set_name ("EditorTimeButton");
        bbt_label.set_size_request (-1, (int)timebar_height);
@@ -399,12 +385,12 @@ Editor::Editor ()
        minsec_label.set_padding (5,0);
        minsec_label.hide ();
        minsec_label.set_no_show_all();
-       smpte_label.set_name ("EditorTimeButton");
-       smpte_label.set_size_request (-1, (int)timebar_height);
-       smpte_label.set_alignment (1.0, 0.5);
-       smpte_label.set_padding (5,0);
-       smpte_label.hide ();
-       smpte_label.set_no_show_all();
+       timecode_label.set_name ("EditorTimeButton");
+       timecode_label.set_size_request (-1, (int)timebar_height);
+       timecode_label.set_alignment (1.0, 0.5);
+       timecode_label.set_padding (5,0);
+       timecode_label.hide ();
+       timecode_label.set_no_show_all();
        frame_label.set_name ("EditorTimeButton");
        frame_label.set_size_request (-1, (int)timebar_height);
        frame_label.set_alignment (1.0, 0.5);
@@ -451,42 +437,37 @@ Editor::Editor ()
 
        initialize_rulers ();
        initialize_canvas ();
+       _summary = new EditorSummary (this);
 
-       selection->TimeChanged.connect (mem_fun(*this, &Editor::time_selection_changed));
-       selection->TracksChanged.connect (mem_fun(*this, &Editor::track_selection_changed));
-       editor_regions_selection_changed_connection = selection->RegionsChanged.connect (mem_fun(*this, &Editor::region_selection_changed));
-       selection->PointsChanged.connect (mem_fun(*this, &Editor::point_selection_changed));
-       selection->MarkersChanged.connect (mem_fun(*this, &Editor::marker_selection_changed));
+       selection->TimeChanged.connect (sigc::mem_fun(*this, &Editor::time_selection_changed));
+       selection->TracksChanged.connect (sigc::mem_fun(*this, &Editor::track_selection_changed));
+       editor_regions_selection_changed_connection = selection->RegionsChanged.connect (sigc::mem_fun(*this, &Editor::region_selection_changed));
+       selection->PointsChanged.connect (sigc::mem_fun(*this, &Editor::point_selection_changed));
+       selection->MarkersChanged.connect (sigc::mem_fun(*this, &Editor::marker_selection_changed));
 
        edit_controls_vbox.set_spacing (0);
-       horizontal_adjustment.signal_value_changed().connect (mem_fun(*this, &Editor::scroll_canvas_horizontally), false);
-       vertical_adjustment.signal_value_changed().connect (mem_fun(*this, &Editor::tie_vertical_scrolling), true);
-       track_canvas->signal_map_event().connect (mem_fun (*this, &Editor::track_canvas_map_handler));
+       horizontal_adjustment.signal_value_changed().connect (sigc::mem_fun(*this, &Editor::scroll_canvas_horizontally), false);
+       vertical_adjustment.signal_value_changed().connect (sigc::mem_fun(*this, &Editor::tie_vertical_scrolling), true);
+       track_canvas->signal_map_event().connect (sigc::mem_fun (*this, &Editor::track_canvas_map_handler));
 
-       controls_layout.add (edit_controls_vbox);
-       controls_layout.set_name ("EditControlsBase");
-       controls_layout.add_events (Gdk::SCROLL_MASK);
-       controls_layout.signal_scroll_event().connect (mem_fun(*this, &Editor::control_layout_scroll), false);
-       
-       controls_layout.add_events (Gdk::BUTTON_PRESS_MASK|Gdk::BUTTON_RELEASE_MASK|Gdk::ENTER_NOTIFY_MASK|Gdk::LEAVE_NOTIFY_MASK);
-       controls_layout.signal_button_release_event().connect (mem_fun(*this, &Editor::edit_controls_button_release));
-       controls_layout_size_request_connection = controls_layout.signal_size_request().connect (mem_fun (*this, &Editor::controls_layout_size_request));
+       HBox* h = manage (new HBox);
+       _group_tabs = new EditorGroupTabs (this);
+       h->pack_start (*_group_tabs, PACK_SHRINK);
+       h->pack_start (edit_controls_vbox);
+       controls_layout.add (*h);
 
-       edit_vscrollbar.set_adjustment (vertical_adjustment);
-       edit_hscrollbar.set_adjustment (horizontal_adjustment);
+       ARDOUR_UI::instance()->tooltips().set_tip (*_group_tabs, _("Groups: context-click for possible operations"));
 
-       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));
+       controls_layout.set_name ("EditControlsBase");
+       controls_layout.add_events (Gdk::SCROLL_MASK);
+       controls_layout.signal_scroll_event().connect (sigc::mem_fun(*this, &Editor::control_layout_scroll), false);
 
-       edit_hscrollbar.set_name ("EditorHScrollbar");
+       controls_layout.add_events (Gdk::BUTTON_PRESS_MASK|Gdk::BUTTON_RELEASE_MASK|Gdk::ENTER_NOTIFY_MASK|Gdk::LEAVE_NOTIFY_MASK);
+       controls_layout.signal_button_release_event().connect (sigc::mem_fun(*this, &Editor::edit_controls_button_release));
+       controls_layout_size_request_connection = controls_layout.signal_size_request().connect (sigc::mem_fun (*this, &Editor::controls_layout_size_request));
 
        build_cursors ();
-       setup_toolbar ();
-       setup_midi_toolbar ();
 
-       edit_point_clock.ValueChanged.connect (mem_fun(*this, &Editor::edit_point_clock_changed));
-       
        ArdourCanvas::Canvas* time_pad = manage(new ArdourCanvas::Canvas());
        ArdourCanvas::SimpleLine* pad_line_1 = manage(new ArdourCanvas::SimpleLine(*time_pad->root(),
                        0.0, 1.0, 100.0, 1.0));
@@ -494,20 +475,18 @@ Editor::Editor ()
        pad_line_1->show();
        time_pad->show();
 
-       //time_canvas_vbox.set_size_request (-1, (int)(timebar_height * visible_timebars) + 2);
-       //time_canvas_vbox.set_size_request (-1, -1);
+       time_canvas_vbox.set_size_request (-1, (int)(timebar_height * visible_timebars) + 2);
+       time_canvas_vbox.set_size_request (-1, -1);
 
-       ruler_label_event_box.add (ruler_label_vbox);   
+       ruler_label_event_box.add (ruler_label_vbox);
        ruler_label_event_box.set_events (Gdk::BUTTON_PRESS_MASK|Gdk::BUTTON_RELEASE_MASK);
-       ruler_label_event_box.set_name ("TimebarLabelBase");
-       ruler_label_event_box.signal_button_release_event().connect (mem_fun(*this, &Editor::ruler_label_button_release));
+       ruler_label_event_box.signal_button_release_event().connect (sigc::mem_fun(*this, &Editor::ruler_label_button_release));
 
        time_button_event_box.add (time_button_vbox);
-       time_button_event_box.set_name ("TimebarLabelBase");
        time_button_event_box.set_events (Gdk::BUTTON_PRESS_MASK|Gdk::BUTTON_RELEASE_MASK);
-       time_button_event_box.signal_button_release_event().connect (mem_fun(*this, &Editor::ruler_label_button_release));
+       time_button_event_box.signal_button_release_event().connect (sigc::mem_fun(*this, &Editor::ruler_label_button_release));
 
-       /* these enable us to have a dedicated window (for cursor setting, etc.) 
+       /* these enable us to have a dedicated window (for cursor setting, etc.)
           for the canvas areas.
        */
 
@@ -515,274 +494,102 @@ Editor::Editor ()
 
        time_canvas_event_box.add (time_canvas_vbox);
        time_canvas_event_box.set_events (Gdk::BUTTON_PRESS_MASK|Gdk::BUTTON_RELEASE_MASK|Gdk::POINTER_MOTION_MASK);
-       
+
        edit_packer.set_col_spacings (0);
        edit_packer.set_row_spacings (0);
        edit_packer.set_homogeneous (false);
        edit_packer.set_border_width (0);
        edit_packer.set_name ("EditorWindow");
 
-#ifndef THE_OLD_WAY
-
-       edit_packer.attach (ruler_label_event_box,   0, 1, 0, 1,    FILL,        SHRINK, 0, 0);
-
-       edit_packer.attach (time_button_event_box,   0, 1, 1, 2,    FILL,        SHRINK, 0, 0);
-       edit_packer.attach (time_canvas_event_box,   1, 2, 0, 1,    FILL|EXPAND, FILL, 0, 0);
-
-       edit_packer.attach (controls_layout,         0, 1, 2, 3,    FILL,        FILL|EXPAND, 0, 0);
-       edit_packer.attach (track_canvas_event_box,  1, 2, 1, 3,    FILL|EXPAND, FILL|EXPAND, 0, 0);
-
-       edit_packer.attach (zoom_box,                0, 1, 3, 4,    FILL,         FILL, 0, 0);
-       edit_packer.attach (edit_hscrollbar,         1, 2, 3, 4,    FILL|EXPAND,  FILL, 0, 0);
-
-       edit_packer.attach (edit_vscrollbar,         3, 4, 2, 3,    FILL,        FILL|EXPAND, 0, 0);
-
-#else
-       
-       edit_packer.attach (edit_vscrollbar,         0, 1, 0, 4,    FILL,        FILL|EXPAND, 0, 0);
-
+       edit_packer.attach (zoom_vbox,               0, 1, 0, 2,    SHRINK,        FILL, 0, 0);
+       /* labels for the rulers */
        edit_packer.attach (ruler_label_event_box,   1, 2, 0, 1,    FILL,        SHRINK, 0, 0);
+       /* labels for the marker "tracks" */
        edit_packer.attach (time_button_event_box,   1, 2, 1, 2,    FILL,        SHRINK, 0, 0);
+       /* the rulers */
        edit_packer.attach (time_canvas_event_box,   2, 3, 0, 1,    FILL|EXPAND, FILL, 0, 0);
-
-       edit_packer.attach (controls_layout,         1, 2, 2, 3,    FILL,        FILL|EXPAND, 0, 0);
+       /* track controls */
+       edit_packer.attach (controls_layout,         0, 2, 2, 3,    FILL,        FILL|EXPAND, 0, 0);
+       /* main canvas */
        edit_packer.attach (track_canvas_event_box,  2, 3, 1, 3,    FILL|EXPAND, FILL|EXPAND, 0, 0);
 
-       edit_packer.attach (zoom_box,                1, 2, 3, 4,    FILL,         FILL, 0, 0);
-       edit_packer.attach (edit_hscrollbar,         2, 3, 3, 4,    FILL|EXPAND,  FILL, 0, 0);
-#endif
-
        bottom_hbox.set_border_width (2);
        bottom_hbox.set_spacing (3);
 
-       route_display_model = ListStore::create(route_display_columns);
-       route_list_display.set_model (route_display_model);
-       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));
-       route_list_display.set_headers_visible (true);
-       route_list_display.set_name ("TrackListDisplay");
-       route_list_display.get_selection()->set_mode (SELECTION_SINGLE);
-       route_list_display.set_reorderable (true);
-       route_list_display.set_size_request (100,-1);
-       route_list_display.add_object_drag (route_display_columns.route.index(), "routes");
-
-       CellRendererToggle* route_list_visible_cell = dynamic_cast<CellRendererToggle*>(route_list_display.get_column_cell_renderer (0));
-       route_list_visible_cell->property_activatable() = true;
-       route_list_visible_cell->property_radio() = false;
-
-       route_display_model->signal_row_deleted().connect (mem_fun (*this, &Editor::route_list_delete));
-       route_display_model->signal_row_changed().connect (mem_fun (*this, &Editor::route_list_change));
-
-       route_list_display.signal_button_press_event().connect (mem_fun (*this, &Editor::route_list_display_button_press), false);
-
-       route_list_scroller.add (route_list_display);
-       route_list_scroller.set_policy (POLICY_NEVER, POLICY_AUTOMATIC);
-
-       group_model = ListStore::create(group_columns);
-       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 (_("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));
-       edit_group_display.get_column (0)->set_expand (true);
-       edit_group_display.get_column (1)->set_expand (false);
-       edit_group_display.get_column (2)->set_expand (false);
-       edit_group_display.set_headers_visible (true);
-
-       /* name is directly editable */
-
-       CellRendererText* name_cell = dynamic_cast<CellRendererText*>(edit_group_display.get_column_cell_renderer (0));
-       name_cell->property_editable() = true;
-       name_cell->signal_edited().connect (mem_fun (*this, &Editor::edit_group_name_edit));
-
-       /* use checkbox for the active + visible columns */
-
-       CellRendererToggle* active_cell = dynamic_cast<CellRendererToggle*>(edit_group_display.get_column_cell_renderer (1));
-       active_cell->property_activatable() = true;
-       active_cell->property_radio() = false;
-
-       active_cell = dynamic_cast<CellRendererToggle*>(edit_group_display.get_column_cell_renderer (1));
-       active_cell->property_activatable() = true;
-       active_cell->property_radio() = false;
-
-       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);
-
-       edit_group_display_scroller.add (edit_group_display);
-       edit_group_display_scroller.set_policy (POLICY_AUTOMATIC, POLICY_AUTOMATIC);
-
-       edit_group_display.signal_button_press_event().connect (mem_fun(*this, &Editor::edit_group_list_button_press_event), false);
-
-       VBox* edit_group_display_packer = manage (new VBox());
-       HBox* edit_group_display_button_box = manage (new HBox());
-       edit_group_display_button_box->set_homogeneous (true);
-
-       Button* edit_group_add_button = manage (new Button ());
-       Button* edit_group_remove_button = manage (new Button ());
-
-       Widget* w;
-
-       w = manage (new Image (Stock::ADD, ICON_SIZE_BUTTON));
-       w->show();
-       edit_group_add_button->add (*w);
-
-       w = manage (new Image (Stock::REMOVE, ICON_SIZE_BUTTON));
-       w->show();
-       edit_group_remove_button->add (*w);
-
-       edit_group_add_button->signal_clicked().connect (mem_fun (*this, &Editor::new_edit_group));
-       edit_group_remove_button->signal_clicked().connect (mem_fun (*this, &Editor::remove_selected_edit_group));
-       
-       edit_group_display_button_box->pack_start (*edit_group_add_button);
-       edit_group_display_button_box->pack_start (*edit_group_remove_button);
-
-       edit_group_display_packer->pack_start (edit_group_display_scroller, true, true);
-       edit_group_display_packer->pack_start (*edit_group_display_button_box, false, false);
-
-       region_list_display.set_size_request (100, -1);
-       region_list_display.set_name ("RegionListDisplay");
-       /* Try to prevent single mouse presses from initiating edits.
-          This relies on a hack in gtktreeview.c:gtk_treeview_button_press()
-       */
-       region_list_display.set_data ("mouse-edits-require-mod1", (gpointer) 0x1);
-
-       region_list_model = TreeStore::create (region_list_columns);
-       region_list_model->set_sort_func (0, mem_fun (*this, &Editor::region_list_sorter));
-       region_list_model->set_sort_column (0, SORT_ASCENDING);
-
-       region_list_display.set_model (region_list_model);
-       region_list_display.append_column (_("Regions"), region_list_columns.name);
-       region_list_display.append_column (_("Start"), region_list_columns.start);
-       region_list_display.append_column (_("End"), region_list_columns.end);
-       region_list_display.append_column (_("Length"), region_list_columns.length);
-       region_list_display.append_column (_("Sync"), region_list_columns.sync);
-       region_list_display.append_column (_("Fade In"), region_list_columns.fadein);
-       region_list_display.append_column (_("Fade Out"), region_list_columns.fadeout);
-       region_list_display.append_column (_("L"), region_list_columns.locked);
-       region_list_display.append_column (_("G"), region_list_columns.glued);
-       region_list_display.append_column (_("M"), region_list_columns.muted);
-       region_list_display.append_column (_("O"), region_list_columns.opaque);
-       region_list_display.append_column (_("Used"), region_list_columns.used);
-       region_list_display.append_column (_("Path"), region_list_columns.path);
-       region_list_display.set_headers_visible (true);
-       //region_list_display.set_grid_lines (TREE_VIEW_GRID_LINES_BOTH);
-       
-       CellRendererText* region_name_cell = dynamic_cast<CellRendererText*>(region_list_display.get_column_cell_renderer (0));
-       region_name_cell->property_editable() = true;
-       region_name_cell->signal_edited().connect (mem_fun (*this, &Editor::region_name_edit));
-
-       region_list_display.get_selection()->set_select_function (mem_fun (*this, &Editor::region_list_selection_filter));
-       
-       TreeViewColumn* tv_col = region_list_display.get_column(0);
-       CellRendererText* renderer = dynamic_cast<CellRendererText*>(region_list_display.get_column_cell_renderer (0));
-       tv_col->add_attribute(renderer->property_text(), region_list_columns.name);
-       tv_col->add_attribute(renderer->property_foreground_gdk(), region_list_columns.color_);
-       
-       region_list_display.get_selection()->set_mode (SELECTION_MULTIPLE);
-       region_list_display.add_object_drag (region_list_columns.region.index(), "regions");
-       
-       /* setup DnD handling */
-       
-       list<TargetEntry> region_list_target_table;
-       
-       region_list_target_table.push_back (TargetEntry ("text/plain"));
-       region_list_target_table.push_back (TargetEntry ("text/uri-list"));
-       region_list_target_table.push_back (TargetEntry ("application/x-rootwin-drop"));
-       
-       region_list_display.add_drop_targets (region_list_target_table);
-       region_list_display.signal_drag_data_received().connect (mem_fun(*this, &Editor::region_list_display_drag_data_received));
-
-       region_list_scroller.add (region_list_display);
-       region_list_scroller.set_policy (POLICY_AUTOMATIC, POLICY_AUTOMATIC);
-       
-       region_list_display.signal_key_press_event().connect (mem_fun(*this, &Editor::region_list_display_key_press));
-       region_list_display.signal_key_release_event().connect (mem_fun(*this, &Editor::region_list_display_key_release));
-       region_list_display.signal_button_press_event().connect (mem_fun(*this, &Editor::region_list_display_button_press), false);
-       region_list_display.signal_button_release_event().connect (mem_fun(*this, &Editor::region_list_display_button_release));
-       region_list_change_connection = region_list_display.get_selection()->signal_changed().connect (mem_fun(*this, &Editor::region_list_selection_changed));
-       // region_list_display.signal_popup_menu().connect (bind (mem_fun (*this, &Editor::show_region_list_display_context_menu), 1, 0));
-       
-       //ARDOUR_UI::instance()->secondary_clock.mode_changed.connect (mem_fun(*this, &Editor::redisplay_regions));
-       ARDOUR_UI::instance()->secondary_clock.mode_changed.connect (mem_fun(*this, &Editor::update_all_region_rows));
-       ARDOUR::Region::RegionPropertyChanged.connect (mem_fun(*this, &Editor::update_region_row));
-       
-       named_selection_scroller.add (named_selection_display);
-       named_selection_scroller.set_policy (POLICY_NEVER, POLICY_AUTOMATIC);
-
-       named_selection_model = TreeStore::create (named_selection_columns);
-       named_selection_display.set_model (named_selection_model);
-       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 ("NamedSelectionDisplay");
-       
-       named_selection_display.get_selection()->set_mode (SELECTION_SINGLE);
-       named_selection_display.set_size_request (100, -1);
-       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 */
-
-       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 ("SnapshotDisplay");
-       snapshot_display.set_size_request (75, -1);
-       snapshot_display.set_headers_visible (false);
-       snapshot_display.set_reorderable (false);
-       snapshot_display_scroller.add (snapshot_display);
-       snapshot_display_scroller.set_policy (Gtk::POLICY_NEVER, Gtk::POLICY_AUTOMATIC);
-
-       snapshot_display.get_selection()->signal_changed().connect (mem_fun(*this, &Editor::snapshot_display_selection_changed));
-       snapshot_display.signal_button_press_event().connect (mem_fun (*this, &Editor::snapshot_display_button_press), false);
+       _route_groups = new EditorRouteGroups (this);
+       _routes = new EditorRoutes (this);
+       _regions = new EditorRegions (this);
+       _snapshots = new EditorSnapshots (this);
+       _locations = new EditorLocations (this);
 
        Gtk::Label* nlabel;
 
        nlabel = manage (new Label (_("Regions")));
        nlabel->set_angle (-90);
-       the_notebook.append_page (region_list_scroller, *nlabel);
+       the_notebook.append_page (_regions->widget (), *nlabel);
        nlabel = manage (new Label (_("Tracks/Busses")));
        nlabel->set_angle (-90);
-       the_notebook.append_page (route_list_scroller, *nlabel);
+       the_notebook.append_page (_routes->widget (), *nlabel);
        nlabel = manage (new Label (_("Snapshots")));
        nlabel->set_angle (-90);
-       the_notebook.append_page (snapshot_display_scroller, *nlabel);
-       nlabel = manage (new Label (_("Edit Groups")));
+       the_notebook.append_page (_snapshots->widget (), *nlabel);
+       nlabel = manage (new Label (_("Route Groups")));
        nlabel->set_angle (-90);
-       the_notebook.append_page (*edit_group_display_packer, *nlabel);
-       
-       if (!Profile->get_sae()) {
-               nlabel = manage (new Label (_("Chunks")));
-               nlabel->set_angle (-90);
-               the_notebook.append_page (named_selection_scroller, *nlabel);
-       }
+       the_notebook.append_page (_route_groups->widget (), *nlabel);
+       nlabel = manage (new Label (_("Ranges & Marks")));
+       nlabel->set_angle (-90);
+       the_notebook.append_page (_locations->widget (), *nlabel);
 
        the_notebook.set_show_tabs (true);
        the_notebook.set_scrollable (true);
-       the_notebook.popup_enable ();
+       the_notebook.popup_disable ();
        the_notebook.set_tab_pos (Gtk::POS_RIGHT);
        the_notebook.show_all ();
-
+       
        post_maximal_editor_width = 0;
        post_maximal_pane_position = 0;
-       edit_pane.pack1 (edit_packer, true, true);
-       edit_pane.pack2 (the_notebook, false, true);
+
+       VPaned *editor_summary_pane = manage(new VPaned());
+       editor_summary_pane->pack1(edit_packer);
+
+       Button* summary_arrows_left_left = manage (new Button);
+       summary_arrows_left_left->add (*manage (new Arrow (ARROW_LEFT, SHADOW_NONE)));
+       summary_arrows_left_left->signal_clicked().connect (sigc::mem_fun (*this, &Editor::horizontal_scroll_left));
+       Button* summary_arrows_left_right = manage (new Button);
+       summary_arrows_left_right->add (*manage (new Arrow (ARROW_RIGHT, SHADOW_NONE)));
+       summary_arrows_left_right->signal_clicked().connect (sigc::mem_fun (*this, &Editor::horizontal_scroll_right));
+       VBox* summary_arrows_left = manage (new VBox);
+       summary_arrows_left->pack_start (*summary_arrows_left_left);
+       summary_arrows_left->pack_start (*summary_arrows_left_right);
+
+       Button* summary_arrows_right_left = manage (new Button);
+       summary_arrows_right_left->add (*manage (new Arrow (ARROW_LEFT, SHADOW_NONE)));
+       summary_arrows_right_left->signal_clicked().connect (sigc::mem_fun (*this, &Editor::horizontal_scroll_left));
+       Button* summary_arrows_right_right = manage (new Button);
+       summary_arrows_right_right->add (*manage (new Arrow (ARROW_RIGHT, SHADOW_NONE)));
+       summary_arrows_right_right->signal_clicked().connect (sigc::mem_fun (*this, &Editor::horizontal_scroll_right));
+       VBox* summary_arrows_right = manage (new VBox);
+       summary_arrows_right->pack_start (*summary_arrows_right_left);
+       summary_arrows_right->pack_start (*summary_arrows_right_right);
+
+       Frame* summary_frame = manage (new Frame);
+       summary_frame->set_shadow_type (Gtk::SHADOW_ETCHED_IN);
+       summary_frame->add (*_summary);
+       summary_frame->show ();
+
+       HBox* summary_hbox = manage (new HBox);
+       summary_hbox->pack_start (*summary_arrows_left, false, false);
+       summary_hbox->pack_start (*summary_frame, true, true);
+       summary_hbox->pack_start (*summary_arrows_right, false, false);
        
-       edit_pane.signal_size_allocate().connect (bind (mem_fun(*this, &Editor::pane_allocation_handler), static_cast<Paned*> (&edit_pane)));
+       editor_summary_pane->pack2(*summary_hbox);
+
+       edit_pane.pack1 (*editor_summary_pane, true, true);
+       edit_pane.pack2 (the_notebook, false, true);
+
+       edit_pane.signal_size_allocate().connect (sigc::bind (sigc::mem_fun(*this, &Editor::pane_allocation_handler), static_cast<Paned*> (&edit_pane)));
 
        top_hbox.pack_start (toolbar_frame, false, true);
-       top_hbox.pack_start (midi_toolbar_frame, false, true);
 
        HBox *hbox = manage (new HBox);
        hbox->pack_start (edit_pane, true, true);
@@ -801,22 +608,26 @@ Editor::Editor ()
        vpacker.pack_end (global_hpacker, true, true);
 
        /* register actions now so that set_state() can find them and set toggles/checks etc */
-       
+
        register_actions ();
 
-       snap_type = SnapToBeat;
-       set_snap_to (snap_type);
-       snap_mode = SnapOff;
-       set_snap_mode (snap_mode);
+       setup_toolbar ();
+       setup_midi_toolbar ();
+
+       _snap_type = SnapToBeat;
+       set_snap_to (_snap_type);
+       _snap_mode = SnapOff;
+       set_snap_mode (_snap_mode);
+       set_mouse_mode (MouseObject, true);
        set_edit_point_preference (EditAtMouse, true);
 
        XMLNode* node = ARDOUR_UI::instance()->editor_settings();
-       set_state (*node);
+       set_state (*node, Stateful::loading_state_version);
 
        _playlist_selector = new PlaylistSelector();
-       _playlist_selector->signal_delete_event().connect (bind (sigc::ptr_fun (just_hide_it), static_cast<Window *> (_playlist_selector)));
+       _playlist_selector->signal_delete_event().connect (sigc::bind (sigc::ptr_fun (just_hide_it), static_cast<Window *> (_playlist_selector)));
 
-       RegionView::RegionViewGoingAway.connect (mem_fun(*this, &Editor::catch_vanishing_regionview));
+       RegionView::RegionViewGoingAway.connect (*this, boost::bind (&Editor::catch_vanishing_regionview, this, _1));
 
        /* nudge stuff */
 
@@ -861,19 +672,20 @@ Editor::Editor ()
        add (vpacker);
        add_events (Gdk::KEY_PRESS_MASK|Gdk::KEY_RELEASE_MASK);
 
-       signal_configure_event().connect (mem_fun (*ARDOUR_UI::instance(), &ARDOUR_UI::configure_handler));
-       signal_delete_event().connect (mem_fun (*ARDOUR_UI::instance(), &ARDOUR_UI::exit_on_main_window_close));
+       signal_configure_event().connect (sigc::mem_fun (*ARDOUR_UI::instance(), &ARDOUR_UI::configure_handler));
+       signal_delete_event().connect (sigc::mem_fun (*ARDOUR_UI::instance(), &ARDOUR_UI::exit_on_main_window_close));
 
        /* allow external control surfaces/protocols to do various things */
 
-       ControlProtocol::ZoomToSession.connect (mem_fun (*this, &Editor::temporal_zoom_session));
-       ControlProtocol::ZoomIn.connect (bind (mem_fun (*this, &Editor::temporal_zoom_step), false));
-       ControlProtocol::ZoomOut.connect (bind (mem_fun (*this, &Editor::temporal_zoom_step), true));
-       ControlProtocol::ScrollTimeline.connect (mem_fun (*this, &Editor::control_scroll));
-       BasicUI::AccessAction.connect (mem_fun (*this, &Editor::access_action));
+       ControlProtocol::ZoomToSession.connect (*this, boost::bind (&Editor::temporal_zoom_session, this));
+       ControlProtocol::ZoomIn.connect (*this, boost::bind (&Editor::temporal_zoom_step, this, false));
+       ControlProtocol::ZoomOut.connect (*this, boost::bind (&Editor::temporal_zoom_step, this, true));
+       ControlProtocol::ScrollTimeline.connect (*this, boost::bind (&Editor::control_scroll, this, _1));
+       BasicUI::AccessAction.connect (*this, boost::bind (&Editor::access_action, this, _1, _2));
+
+       Config->ParameterChanged.connect (*this, boost::bind (&Editor::parameter_changed, this, _1));
 
-       Config->ParameterChanged.connect (mem_fun (*this, &Editor::parameter_changed));
-       Route::SyncOrderKeys.connect (mem_fun (*this, &Editor::sync_order_keys));
+       _last_normalization_value = 0;
 
        constructed = true;
        instant_save ();
@@ -887,14 +699,16 @@ Editor::~Editor()
                {
                        image_socket_listener->close_connection() ;
                }
-               
+
                delete image_socket_listener ;
                image_socket_listener = 0 ;
        }
 #endif
 
+       delete _routes;
+       delete _route_groups;
        delete track_canvas;
-       track_canvas = 0;
+       delete _drag;
 }
 
 void
@@ -911,8 +725,10 @@ Editor::catch_vanishing_regionview (RegionView *rv)
           audioregionview by itself.
        */
 
-       if (rv->get_canvas_group() == drag_info.item) {
-               end_grab (drag_info.item, 0);
+       if (_drag && rv->get_canvas_group() == _drag->item() && !_drag->ending()) {
+               _drag->end_grab (0);
+               delete _drag;
+               _drag = 0;
        }
 
        if (clicked_regionview == rv) {
@@ -958,15 +774,20 @@ Editor::show_window ()
        if (! is_visible ()) {
                show_all ();
 
-                /* re-hide editor list if necessary */
-                editor_list_button_toggled ();
+               /* re-hide editor list if necessary */
+               editor_list_button_toggled ();
+
+               /* re-hide summary widget if necessary */
+               parameter_changed ("show-summary");
+
+               parameter_changed ("show-edit-group-tabs");
 
                /* now reset all audio_time_axis heights, because widgets might need
                   to be re-hidden
                */
 
                TimeAxisView *tv;
-       
+
                for (TrackViewList::iterator i = track_views.begin(); i != track_views.end(); ++i) {
                        tv = (static_cast<TimeAxisView*>(*i));
                        tv->reset_height ();
@@ -983,60 +804,39 @@ Editor::instant_save ()
                return;
        }
 
-       if (session) {
-               session->add_instant_xml(get_state());
+       if (_session) {
+               _session->add_instant_xml(get_state());
        } else {
                Config->add_instant_xml(get_state());
        }
 }
 
-void
-Editor::edit_point_clock_changed()
-{
-       if (_dragging_edit_point) {
-               return;
-       }
-
-       if (selection->markers.empty()) {
-               return;
-       }
-
-       bool ignored;
-       Location* loc = find_location_from_marker (selection->markers.front(), ignored);
-
-       if (!loc) {
-               return;
-       }
-
-       loc->move_to (edit_point_clock.current_time());
-}
-
 void
 Editor::zoom_adjustment_changed ()
 {
-       if (session == 0) {
+       if (_session == 0) {
                return;
        }
 
-       double fpu = zoom_range_clock.current_duration() / canvas_width;
+       double fpu = zoom_range_clock.current_duration() / _canvas_width;
 
        if (fpu < 1.0) {
                fpu = 1.0;
-               zoom_range_clock.set ((nframes64_t) floor (fpu * canvas_width));
-       } else if (fpu > session->current_end_frame() / canvas_width) {
-               fpu = session->current_end_frame() / canvas_width;
-               zoom_range_clock.set ((nframes64_t) floor (fpu * canvas_width));
+               zoom_range_clock.set ((nframes64_t) floor (fpu * _canvas_width));
+       } else if (fpu > _session->current_end_frame() / _canvas_width) {
+               fpu = _session->current_end_frame() / _canvas_width;
+               zoom_range_clock.set ((nframes64_t) floor (fpu * _canvas_width));
        }
-       
+
        temporal_zoom (fpu);
 }
 
 void
 Editor::control_scroll (float fraction)
 {
-       ENSURE_GUI_THREAD(bind (mem_fun (*this, &Editor::control_scroll), fraction));
+       ENSURE_GUI_THREAD (*this, &Editor::control_scroll, fraction)
 
-       if (!session) {
+       if (!_session) {
                return;
        }
 
@@ -1044,7 +844,7 @@ Editor::control_scroll (float fraction)
 
        /*
                _control_scroll_target is an optional<T>
-       
+
                it acts like a pointer to an nframes64_t, with
                a operator conversion to boolean to check
                that it has a value could possibly use
@@ -1054,7 +854,7 @@ Editor::control_scroll (float fraction)
        */
 
        if (!_control_scroll_target) {
-               _control_scroll_target = session->transport_frame();
+               _control_scroll_target = _session->transport_frame();
                _dragging_playhead = true;
        }
 
@@ -1070,7 +870,7 @@ Editor::control_scroll (float fraction)
 
        playhead_cursor->set_position (*_control_scroll_target);
        UpdateAllTransportClocks (*_control_scroll_target);
-       
+
        if (*_control_scroll_target > (current_page_frames() / 2)) {
                /* try to center PH in window */
                reset_x_origin (*_control_scroll_target - (current_page_frames()/2));
@@ -1090,13 +890,13 @@ Editor::control_scroll (float fraction)
 
        /* add the next timeout */
 
-       control_scroll_connection = Glib::signal_timeout().connect (bind (mem_fun (*this, &Editor::deferred_control_scroll), *_control_scroll_target), 250);
+       control_scroll_connection = Glib::signal_timeout().connect (sigc::bind (sigc::mem_fun (*this, &Editor::deferred_control_scroll), *_control_scroll_target), 250);
 }
 
 bool
-Editor::deferred_control_scroll (nframes64_t target)
+Editor::deferred_control_scroll (nframes64_t /*target*/)
 {
-       session->request_locate (*_control_scroll_target, session->transport_rolling());
+       _session->request_locate (*_control_scroll_target, _session->transport_rolling());
        // reset for next stream
        _control_scroll_target = boost::none;
        _dragging_playhead = false;
@@ -1106,11 +906,11 @@ Editor::deferred_control_scroll (nframes64_t target)
 void
 Editor::access_action (std::string action_group, std::string action_item)
 {
-       if (!session) {
+       if (!_session) {
                return;
        }
 
-       ENSURE_GUI_THREAD (bind (mem_fun (*this, &Editor::access_action), action_group, action_item));
+       ENSURE_GUI_THREAD (*this, &Editor::access_action, action_group, action_item)
 
        RefPtr<Action> act;
        act = ActionManager::get_action( action_group.c_str(), action_item.c_str() );
@@ -1118,7 +918,7 @@ Editor::access_action (std::string action_group, std::string action_item)
        if (act) {
                act->activate();
        }
-               
+
 
 }
 
@@ -1132,8 +932,8 @@ Editor::on_realize ()
 void
 Editor::start_scrolling ()
 {
-       scroll_connection = ARDOUR_UI::instance()->SuperRapidScreenUpdate.connect 
-               (mem_fun(*this, &Editor::update_current_screen));
+       scroll_connection = ARDOUR_UI::instance()->SuperRapidScreenUpdate.connect
+               (sigc::mem_fun(*this, &Editor::update_current_screen));
 
 }
 
@@ -1146,24 +946,24 @@ Editor::stop_scrolling ()
 void
 Editor::map_position_change (nframes64_t frame)
 {
-       ENSURE_GUI_THREAD (bind (mem_fun(*this, &Editor::map_position_change), frame));
+       ENSURE_GUI_THREAD (*this, &Editor::map_position_change, frame)
 
-       if (session == 0 || !_follow_playhead) {
+       if (_session == 0 || !_follow_playhead) {
                return;
        }
 
        center_screen (frame);
        playhead_cursor->set_position (frame);
-}      
+}
 
 void
 Editor::center_screen (nframes64_t frame)
 {
-       double page = canvas_width * frames_per_unit;
+       double page = _canvas_width * frames_per_unit;
 
        /* if we're off the page, then scroll.
         */
-       
+
        if (frame < leftmost_frame || frame >= leftmost_frame + page) {
                center_screen_internal (frame, page);
        }
@@ -1173,7 +973,7 @@ void
 Editor::center_screen_internal (nframes64_t frame, float page)
 {
        page /= 2;
-               
+
        if (frame > page) {
                frame -= (nframes64_t) page;
        } else {
@@ -1186,44 +986,36 @@ Editor::center_screen_internal (nframes64_t frame, float page)
 void
 Editor::handle_new_duration ()
 {
-       if (!session) {
+       if (!_session) {
                return;
        }
 
-       ENSURE_GUI_THREAD (mem_fun (*this, &Editor::handle_new_duration));
-       nframes64_t new_end = session->current_end_frame() + (nframes64_t) floorf (current_page_frames() * 0.10f);
+       ENSURE_GUI_THREAD (*this, &Editor::handle_new_duration)
+       nframes64_t new_end = _session->current_end_frame() + (nframes64_t) floorf (current_page_frames() * 0.10f);
 
        horizontal_adjustment.set_upper (new_end / frames_per_unit);
        horizontal_adjustment.set_page_size (current_page_frames()/frames_per_unit);
 
-       if (horizontal_adjustment.get_value() + canvas_width > horizontal_adjustment.get_upper()) {
-               horizontal_adjustment.set_value (horizontal_adjustment.get_upper() - canvas_width);
+       if (horizontal_adjustment.get_value() + _canvas_width > horizontal_adjustment.get_upper()) {
+               horizontal_adjustment.set_value (horizontal_adjustment.get_upper() - _canvas_width);
        }
        //cerr << "Editor::handle_new_duration () called ha v:l:u:ps:lcf = " << horizontal_adjustment.get_value() << ":" << horizontal_adjustment.get_lower() << ":" << horizontal_adjustment.get_upper() << ":" << horizontal_adjustment.get_page_size() << ":" << endl;//DEBUG
 }
 
-void
-Editor::update_title_s (const string & snap_name)
-{
-       ENSURE_GUI_THREAD(bind (mem_fun(*this, &Editor::update_title_s), snap_name));
-       
-       update_title ();
-}
-
 void
 Editor::update_title ()
 {
-       ENSURE_GUI_THREAD (mem_fun(*this, &Editor::update_title));
+       ENSURE_GUI_THREAD (*this, &Editor::update_title)
 
-       if (session) {
-               bool dirty = session->dirty();
+       if (_session) {
+               bool dirty = _session->dirty();
 
                string session_name;
 
-               if (session->snap_name() != session->name()) {
-                       session_name = session->snap_name();
+               if (_session->snap_name() != _session->name()) {
+                       session_name = _session->snap_name();
                } else {
-                       session_name = session->name();
+                       session_name = _session->name();
                }
 
                if (dirty) {
@@ -1237,137 +1029,134 @@ Editor::update_title ()
 }
 
 void
-Editor::connect_to_session (Session *t)
+Editor::set_session (Session *t)
 {
-       session = t;
+       SessionHandlePtr::set_session (t);
+
+       if (!_session) {
+               return;
+       }
+
+       zoom_range_clock.set_session (_session);
+       _playlist_selector->set_session (_session);
+       nudge_clock.set_session (_session);
+       _summary->set_session (_session);
+       _group_tabs->set_session (_session);
+       _route_groups->set_session (_session);
+       _regions->set_session (_session);
+       _snapshots->set_session (_session);
+       _routes->set_session (_session);
+       _locations->set_session (_session);
+
+       if (rhythm_ferret) {
+               rhythm_ferret->set_session (_session);
+       }
+
+       if (analysis_window) {
+               analysis_window->set_session (_session);
+       }
+
+       if (sfbrowser) {
+               sfbrowser->set_session (_session);
+       }
+
+       compute_fixed_ruler_scale ();
 
        /* there are never any selected regions at startup */
 
        sensitize_the_right_region_actions (false);
 
        XMLNode* node = ARDOUR_UI::instance()->editor_settings();
-       set_state (*node);
+       set_state (*node, Stateful::loading_state_version);
 
        /* catch up with the playhead */
 
-       session->request_locate (playhead_cursor->current_frame);
-
-       if (first_action_message) {
-               first_action_message->hide();
-       }
+       _session->request_locate (playhead_cursor->current_frame);
 
        update_title ();
 
-       session->GoingAway.connect (mem_fun(*this, &Editor::session_going_away));
-       session->history().Changed.connect (mem_fun (*this, &Editor::history_changed));
+       _session->history().Changed.connect (_session_connections, boost::bind (&Editor::history_changed, this));
 
        /* These signals can all be emitted by a non-GUI thread. Therefore the
           handlers for them must not attempt to directly interact with the GUI,
           but use Gtkmm2ext::UI::instance()->call_slot();
        */
 
-       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->RegionsAdded.connect (mem_fun(*this, &Editor::handle_new_regions)));
-       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)));
-       session_connections.push_back (session->NamedSelectionAdded.connect (mem_fun(*this, &Editor::handle_new_named_selection)));
-       session_connections.push_back (session->NamedSelectionRemoved.connect (mem_fun(*this, &Editor::handle_new_named_selection)));
-       session_connections.push_back (session->DirtyChanged.connect (mem_fun(*this, &Editor::update_title)));
-       session_connections.push_back (session->StateSaved.connect (mem_fun(*this, &Editor::update_title_s)));
-       session_connections.push_back (session->AskAboutPlaylistDeletion.connect (mem_fun(*this, &Editor::playlist_deletion_dialog)));
-       session_connections.push_back (session->RegionHiddenChange.connect (mem_fun(*this, &Editor::region_hidden)));
-
-       session_connections.push_back (session->SMPTEOffsetChanged.connect (mem_fun(*this, &Editor::update_just_smpte)));
-
-       session_connections.push_back (session->tempo_map().StateChanged.connect (mem_fun(*this, &Editor::tempo_map_changed)));
-
-       session_connections.push_back (session->Located.connect (mem_fun (*this, &Editor::located)));
-
-       edit_groups_changed ();
-
-       edit_point_clock.set_mode(AudioClock::BBT);
-       edit_point_clock.set_session (session);
-       zoom_range_clock.set_session (session);
-       _playlist_selector->set_session (session);
-       nudge_clock.set_session (session);
+       _session->TransportStateChange.connect (_session_connections, boost::bind (&Editor::map_transport_state, this));
+       _session->PositionChanged.connect (_session_connections, boost::bind (&Editor::map_position_change, this, _1));
+       _session->RouteAdded.connect (_session_connections, boost::bind (&Editor::handle_new_route, this, _1));
+       _session->DurationChanged.connect (_session_connections, boost::bind (&Editor::handle_new_duration, this));
+       _session->DirtyChanged.connect (_session_connections, boost::bind (&Editor::update_title, this));
+       _session->StateSaved.connect (_session_connections, boost::bind (&Editor::update_title, this));
+       _session->AskAboutPlaylistDeletion.connect (_session_connections, boost::bind (&Editor::playlist_deletion_dialog, this, _1));
+       _session->TimecodeOffsetChanged.connect (_session_connections, boost::bind (&Editor::update_just_timecode, this));
+       _session->tempo_map().StateChanged.connect (_session_connections, boost::bind (&Editor::tempo_map_changed, this, _1));
+       _session->Located.connect (_session_connections, boost::bind (&Editor::located, this));
+       _session->config.ParameterChanged.connect (_session_connections, boost::bind (&Editor::parameter_changed, this, _1));
+
        if (Profile->get_sae()) {
                BBT_Time bbt;
                bbt.bars = 0;
                bbt.beats = 0;
                bbt.ticks = 120;
-               nframes_t pos = session->tempo_map().bbt_duration_at (0, bbt, 1);
+               nframes_t pos = _session->tempo_map().bbt_duration_at (0, bbt, 1);
                nudge_clock.set_mode(AudioClock::BBT);
                nudge_clock.set (pos, true, 0, AudioClock::BBT);
-               
+
        } else {
-               nudge_clock.set (session->frame_rate() * 5, true, 0, AudioClock::SMPTE); // default of 5 seconds
+               nudge_clock.set (_session->frame_rate() * 5, true, 0, AudioClock::Timecode); // default of 5 seconds
        }
 
        playhead_cursor->canvas_item.show ();
 
-       if (rhythm_ferret) {
-               rhythm_ferret->set_session (session);
-       }
-
-       if (analysis_window != 0)
-               analysis_window->set_session (session);
-
-       Location* loc = session->locations()->auto_loop_location();
+       Location* loc = _session->locations()->auto_loop_location();
        if (loc == 0) {
-               loc = new Location (0, session->current_end_frame(), _("Loop"),(Location::Flags) (Location::IsAutoLoop | Location::IsHidden));
+               loc = new Location (0, _session->current_end_frame(), _("Loop"),(Location::Flags) (Location::IsAutoLoop | Location::IsHidden));
                if (loc->start() == loc->end()) {
                        loc->set_end (loc->start() + 1);
                }
-               session->locations()->add (loc, false);
-               session->set_auto_loop_location (loc);
+               _session->locations()->add (loc, false);
+               _session->set_auto_loop_location (loc);
        } else {
                // force name
                loc->set_name (_("Loop"));
        }
-       
-       loc = session->locations()->auto_punch_location();
+
+       loc = _session->locations()->auto_punch_location();
        if (loc == 0) {
-               loc = new Location (0, session->current_end_frame(), _("Punch"), (Location::Flags) (Location::IsAutoPunch | Location::IsHidden));
+               loc = new Location (0, _session->current_end_frame(), _("Punch"), (Location::Flags) (Location::IsAutoPunch | Location::IsHidden));
                if (loc->start() == loc->end()) {
                        loc->set_end (loc->start() + 1);
                }
-               session->locations()->add (loc, false);
-               session->set_auto_punch_location (loc);
+               _session->locations()->add (loc, false);
+               _session->set_auto_punch_location (loc);
        } else {
                // force name
                loc->set_name (_("Punch"));
        }
 
-       Config->map_parameters (mem_fun (*this, &Editor::parameter_changed));
-       
-       session->StateSaved.connect (mem_fun(*this, &Editor::session_state_saved));
-       
+       boost::function<void (string)> pc (boost::bind (&Editor::parameter_changed, this, _1));
+       Config->map_parameters (pc);
+       _session->config.map_parameters (pc);
+
+
        refresh_location_display ();
-       session->locations()->added.connect (mem_fun(*this, &Editor::add_new_location));
-       session->locations()->removed.connect (mem_fun(*this, &Editor::location_gone));
-       session->locations()->changed.connect (mem_fun(*this, &Editor::refresh_location_display));
-       session->locations()->StateChanged.connect (mem_fun(*this, &Editor::refresh_location_display_s));
-       session->locations()->end_location()->changed.connect (mem_fun(*this, &Editor::end_location_changed));
 
-       if (sfbrowser) {
-               sfbrowser->set_session (session);
-       }
+       /* static signal - no need to drop connection when session is deleted (XXX or we are?)*/
 
-       handle_new_duration ();
+       _session->StateSaved.connect (*this, boost::bind (&Editor::session_state_saved, this, _1));
+
+       _session->locations()->added.connect (_session_connections, sigc::mem_fun(*this, &Editor::add_new_location));
+       _session->locations()->removed.connect (_session_connections, sigc::mem_fun(*this, &Editor::location_gone));
+       _session->locations()->changed.connect (_session_connections, sigc::mem_fun(*this, &Editor::refresh_location_display));
+       _session->locations()->StateChanged.connect (_session_connections, sigc::mem_fun(*this, &Editor::refresh_location_display_s));
+       _session->locations()->end_location()->changed.connect (_session_connections, sigc::mem_fun(*this, &Editor::end_location_changed));
 
-       redisplay_regions ();
-       redisplay_named_selections ();
-       redisplay_snapshots ();
+       handle_new_duration ();
 
        restore_ruler_visibility ();
        //tempo_map_changed (Change (0));
-       session->tempo_map().apply_with_metrics (*this, &Editor::draw_metric_marks);
-
-       initial_route_list_display ();
+       _session->tempo_map().apply_with_metrics (*this, &Editor::draw_metric_marks);
 
        for (TrackViewList::iterator i = track_views.begin(); i != track_views.end(); ++i) {
                (static_cast<TimeAxisView*>(*i))->set_samples_per_unit (frames_per_unit);
@@ -1375,31 +1164,7 @@ Editor::connect_to_session (Session *t)
 
        start_scrolling ();
 
-       /* 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::iterator i;
-       
-               no_route_list_redisplay = true;
-               
-               for (i = rows.begin(); i != rows.end(); ++i) {
-                       TimeAxisView *tv =  (*i)[route_display_columns.tv];
-                       RouteTimeAxisView *rtv;
-                       
-                       if ((rtv = dynamic_cast<RouteTimeAxisView*>(tv)) != 0) {
-                               if (rtv->route()->is_master()) {
-                                       route_list_display.get_selection()->unselect (i);
-                               }
-                       }
-               }
-               
-               no_route_list_redisplay = false;
-               redisplay_route_list ();
-       }
-       
-       switch (snap_type) {
+       switch (_snap_type) {
        case SnapToRegionStart:
        case SnapToRegionEnd:
        case SnapToRegionSync:
@@ -1412,7 +1177,7 @@ Editor::connect_to_session (Session *t)
        }
 
        /* register for undo history */
-       session->register_with_memento_command_factory(_id, this);
+       _session->register_with_memento_command_factory(_id, this);
 
        start_updating ();
 }
@@ -1421,7 +1186,7 @@ void
 Editor::build_cursors ()
 {
        using namespace Gdk;
-       
+
        Gdk::Color mbg ("#000000" ); /* Black */
        Gdk::Color mfg ("#0000ff" ); /* Blue. */
 
@@ -1434,23 +1199,23 @@ Editor::build_cursors ()
 
        Gdk::Color fbg ("#ffffff" );
        Gdk::Color ffg  ("#000000" );
-       
+
        {
                RefPtr<Bitmap> source, mask;
-               
+
                source = Bitmap::create (fader_cursor_bits, fader_cursor_width, fader_cursor_height);
                mask = Bitmap::create (fader_cursor_mask_bits, fader_cursor_width, fader_cursor_height);
                fader_cursor = new Gdk::Cursor (source, mask, ffg, fbg, fader_cursor_x_hot, fader_cursor_y_hot);
        }
-       
-       { 
+
+       {
                RefPtr<Bitmap> source, mask;
                source = Bitmap::create (speaker_cursor_bits, speaker_cursor_width, speaker_cursor_height);
                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);
        }
-       
-       { 
+
+       {
                RefPtr<Bitmap> bits;
                char pix[4] = { 0, 0, 0, 0 };
                bits = Bitmap::create (pix, 2, 2);
@@ -1458,17 +1223,17 @@ Editor::build_cursors ()
                transparent_cursor = new Gdk::Cursor (bits, bits, c, c, 0, 0);
        }
 
-       { 
+       {
                RefPtr<Bitmap> bits;
                char pix[4] = { 0, 0, 0, 0 };
                bits = Bitmap::create (pix, 2, 2);
                Gdk::Color c;
                transparent_cursor = new Gdk::Cursor (bits, bits, c, c, 0, 0);
        }
-       
+
 
        grabber_cursor = new Gdk::Cursor (HAND2);
-       
+
        {
                Glib::RefPtr<Gdk::Pixbuf> grabber_edit_point_pixbuf (::get_icon ("grabber_edit_point"));
                grabber_edit_point_cursor = new Gdk::Cursor (Gdk::Display::get_default(), grabber_edit_point_pixbuf, 5, 17);
@@ -1506,22 +1271,22 @@ 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 (*this, &Editor::set_fade_in_active), false)));
+                       items.push_back (MenuElem (_("Deactivate"), sigc::bind (sigc::mem_fun (*this, &Editor::set_fade_in_active), false)));
                } else {
-                       items.push_back (MenuElem (_("Activate"), bind (mem_fun (*this, &Editor::set_fade_in_active), true)));
+                       items.push_back (MenuElem (_("Activate"), sigc::bind (sigc::mem_fun (*this, &Editor::set_fade_in_active), true)));
                }
-               
+
                items.push_back (SeparatorElem());
 
                if (Profile->get_sae()) {
-                       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 (_("Linear"), sigc::bind (sigc::mem_fun (*this, &Editor::set_fade_in_shape), AudioRegion::Linear)));
+                       items.push_back (MenuElem (_("Slowest"), sigc::bind (sigc::mem_fun (*this, &Editor::set_fade_in_shape), AudioRegion::Fast)));
                } else {
-                       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)));
+                       items.push_back (MenuElem (_("Linear"), sigc::bind (sigc::mem_fun (*this, &Editor::set_fade_in_shape), AudioRegion::Linear)));
+                       items.push_back (MenuElem (_("Slowest"), sigc::bind (sigc::mem_fun (*this, &Editor::set_fade_in_shape), AudioRegion::Fast)));
+                       items.push_back (MenuElem (_("Slow"), sigc::bind (sigc::mem_fun (*this, &Editor::set_fade_in_shape), AudioRegion::LogB)));
+                       items.push_back (MenuElem (_("Fast"), sigc::bind (sigc::mem_fun (*this, &Editor::set_fade_in_shape), AudioRegion::LogA)));
+                       items.push_back (MenuElem (_("Fastest"), sigc::bind (sigc::mem_fun (*this, &Editor::set_fade_in_shape), AudioRegion::Slow)));
                }
 
                break;
@@ -1529,22 +1294,22 @@ Editor::popup_fade_context_menu (int button, int32_t time, ArdourCanvas::Item* i
        case FadeOutItem:
        case FadeOutHandleItem:
                if (arv->audio_region()->fade_out_active()) {
-                       items.push_back (MenuElem (_("Deactivate"), bind (mem_fun (*this, &Editor::set_fade_out_active), false)));
+                       items.push_back (MenuElem (_("Deactivate"), sigc::bind (sigc::mem_fun (*this, &Editor::set_fade_out_active), false)));
                } else {
-                       items.push_back (MenuElem (_("Activate"), bind (mem_fun (*this, &Editor::set_fade_out_active), true)));
+                       items.push_back (MenuElem (_("Activate"), sigc::bind (sigc::mem_fun (*this, &Editor::set_fade_out_active), true)));
                }
-               
+
                items.push_back (SeparatorElem());
-               
+
                if (Profile->get_sae()) {
-                       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 (_("Linear"), sigc::bind (sigc::mem_fun (*this, &Editor::set_fade_out_shape), AudioRegion::Linear)));
+                       items.push_back (MenuElem (_("Slowest"), sigc::bind (sigc::mem_fun (*this, &Editor::set_fade_out_shape), AudioRegion::Slow)));
                } else {
-                       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)));
+                       items.push_back (MenuElem (_("Linear"), sigc::bind (sigc::mem_fun (*this, &Editor::set_fade_out_shape), AudioRegion::Linear)));
+                       items.push_back (MenuElem (_("Slowest"), sigc::bind (sigc::mem_fun (*this, &Editor::set_fade_out_shape), AudioRegion::Slow)));
+                       items.push_back (MenuElem (_("Slow"), sigc::bind (sigc::mem_fun (*this, &Editor::set_fade_out_shape), AudioRegion::LogA)));
+                       items.push_back (MenuElem (_("Fast"), sigc::bind (sigc::mem_fun (*this, &Editor::set_fade_out_shape), AudioRegion::LogB)));
+                       items.push_back (MenuElem (_("Fastest"), sigc::bind (sigc::mem_fun (*this, &Editor::set_fade_out_shape), AudioRegion::Fast)));
                }
 
                break;
@@ -1604,7 +1369,7 @@ Editor::popup_track_context_menu (int button, int32_t time, ItemType item_type,
 
        menu = (this->*build_menu_function)(frame);
        menu->set_name ("ArdourContextMenu");
-       
+
        /* now handle specific situations */
 
        switch (item_type) {
@@ -1649,23 +1414,23 @@ Editor::popup_track_context_menu (int button, int32_t time, ItemType item_type,
        if (item_type != SelectionItem && clicked_routeview && clicked_routeview->audio_track()) {
 
                /* Bounce to disk */
-               
+
                using namespace Menu_Helpers;
                MenuList& edit_items  = menu->items();
-               
+
                edit_items.push_back (SeparatorElem());
 
                switch (clicked_routeview->audio_track()->freeze_state()) {
                case AudioTrack::NoFreeze:
-                       edit_items.push_back (MenuElem (_("Freeze"), mem_fun(*this, &Editor::freeze_route)));
+                       edit_items.push_back (MenuElem (_("Freeze"), sigc::mem_fun(*this, &Editor::freeze_route)));
                        break;
 
                case AudioTrack::Frozen:
-                       edit_items.push_back (MenuElem (_("Unfreeze"), mem_fun(*this, &Editor::unfreeze_route)));
+                       edit_items.push_back (MenuElem (_("Unfreeze"), sigc::mem_fun(*this, &Editor::unfreeze_route)));
                        break;
-                       
+
                case AudioTrack::UnFrozen:
-                       edit_items.push_back (MenuElem (_("Freeze"), mem_fun(*this, &Editor::freeze_route)));
+                       edit_items.push_back (MenuElem (_("Freeze"), sigc::mem_fun(*this, &Editor::freeze_route)));
                        break;
                }
 
@@ -1679,7 +1444,7 @@ Editor::popup_track_context_menu (int button, int32_t time, ItemType item_type,
 }
 
 Menu*
-Editor::build_track_context_menu (nframes64_t ignored)
+Editor::build_track_context_menu (nframes64_t)
 {
        using namespace Menu_Helpers;
 
@@ -1691,7 +1456,7 @@ Editor::build_track_context_menu (nframes64_t ignored)
 }
 
 Menu*
-Editor::build_track_bus_context_menu (nframes64_t ignored)
+Editor::build_track_bus_context_menu (nframes64_t)
 {
        using namespace Menu_Helpers;
 
@@ -1714,16 +1479,16 @@ Editor::build_track_region_context_menu (nframes64_t frame)
        if (rtv) {
                boost::shared_ptr<Diskstream> ds;
                boost::shared_ptr<Playlist> pl;
-               
+
                if ((ds = rtv->get_diskstream()) && ((pl = ds->playlist()))) {
                        Playlist::RegionList* regions = pl->regions_at ((nframes64_t) floor ( (double)frame * ds->speed()));
 
                        if (selection->regions.size() > 1) {
-                               // there's already a multiple selection: just add a 
-                               // single region context menu that will act on all 
+                               // there's already a multiple selection: just add a
+                               // single region context menu that will act on all
                                // selected regions
-                               boost::shared_ptr<Region> dummy_region; // = NULL               
-                               add_region_context_items (rtv->view(), dummy_region, edit_items);                       
+                               boost::shared_ptr<Region> dummy_region; // = NULL
+                               add_region_context_items (rtv->view(), dummy_region, edit_items);
                        } else {
                                for (Playlist::RegionList::iterator i = regions->begin(); i != regions->end(); ++i) {
                                        add_region_context_items (rtv->view(), (*i), edit_items);
@@ -1767,11 +1532,11 @@ Editor::build_track_crossfade_context_menu (nframes64_t frame)
                        }
 
                        if (selection->regions.size() > 1) {
-                               // there's already a multiple selection: just add a 
-                               // single region context menu that will act on all 
+                               // there's already a multiple selection: just add a
+                               // single region context menu that will act on all
                                // selected regions
-                               boost::shared_ptr<Region> dummy_region; // = NULL               
-                               add_region_context_items (atv->audio_view(), dummy_region, edit_items);                 
+                               boost::shared_ptr<Region> dummy_region; // = NULL
+                               add_region_context_items (atv->audio_view(), dummy_region, edit_items);
                        } else {
                                for (Playlist::RegionList::iterator i = regions->begin(); i != regions->end(); ++i) {
                                        add_region_context_items (atv->audio_view(), (*i), edit_items);
@@ -1792,15 +1557,15 @@ Editor::analyze_region_selection()
        if (analysis_window == 0) {
                analysis_window = new AnalysisWindow();
 
-               if (session != 0)
-                       analysis_window->set_session(session);
+               if (_session != 0)
+                       analysis_window->set_session(_session);
 
                analysis_window->show_all();
        }
 
        analysis_window->set_regionmode();
        analysis_window->analyze();
-       
+
        analysis_window->present();
 }
 
@@ -1810,20 +1575,20 @@ Editor::analyze_range_selection()
        if (analysis_window == 0) {
                analysis_window = new AnalysisWindow();
 
-               if (session != 0)
-                       analysis_window->set_session(session);
+               if (_session != 0)
+                       analysis_window->set_session(_session);
 
                analysis_window->show_all();
        }
 
        analysis_window->set_rangemode();
        analysis_window->analyze();
-       
+
        analysis_window->present();
 }
 
 Menu*
-Editor::build_track_selection_context_menu (nframes64_t ignored)
+Editor::build_track_selection_context_menu (nframes64_t)
 {
        using namespace Menu_Helpers;
        MenuList& edit_items  = track_selection_context_menu.items();
@@ -1840,7 +1605,7 @@ Editor::build_track_selection_context_menu (nframes64_t ignored)
  * @param edit_items List to add the items to.
  */
 void
-Editor::add_crossfade_context_items (AudioStreamView* view, boost::shared_ptr<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);
@@ -1850,12 +1615,12 @@ Editor::add_crossfade_context_items (AudioStreamView* view, boost::shared_ptr<Cr
 
        if (xfade->active()) {
                str = _("Mute");
-       } else { 
+       } else {
                str = _("Unmute");
        }
 
-       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))));
+       items.push_back (MenuElem (str, sigc::bind (sigc::mem_fun(*this, &Editor::toggle_xfade_active), boost::weak_ptr<Crossfade> (xfade))));
+       items.push_back (MenuElem (_("Edit"), sigc::bind (sigc::mem_fun(*this, &Editor::edit_xfade), boost::weak_ptr<Crossfade> (xfade))));
 
        if (xfade->can_follow_overlap()) {
 
@@ -1865,7 +1630,7 @@ Editor::add_crossfade_context_items (AudioStreamView* view, boost::shared_ptr<Cr
                        str = _("Convert to full");
                }
 
-               items.push_back (MenuElem (str, bind (mem_fun(*this, &Editor::toggle_xfade_length), xfade)));
+               items.push_back (MenuElem (str, sigc::bind (sigc::mem_fun(*this, &Editor::toggle_xfade_length), xfade)));
        }
 
        if (many) {
@@ -1896,20 +1661,6 @@ 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);
-       }
-}
-
 void
 Editor::add_region_context_items (StreamView* sv, boost::shared_ptr<Region> region, Menu_Helpers::MenuList& edit_items)
 {
@@ -1926,30 +1677,37 @@ Editor::add_region_context_items (StreamView* sv, boost::shared_ptr<Region> regi
                ar = boost::dynamic_pointer_cast<AudioRegion> (region);
                mr = boost::dynamic_pointer_cast<MidiRegion> (region);
 
-               /* when this particular menu pops up, make the relevant region 
+               /* when this particular menu pops up, make the relevant region
                   become selected.
                */
 
                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 (_("Rename"), mem_fun(*this, &Editor::rename_region)));
-               items.push_back (MenuElem (_("Popup region editor"), mem_fun(*this, &Editor::edit_region)));
+                       sigc::bind (sigc::mem_fun(*this, &Editor::set_selected_regionview_from_map_event), sv, boost::weak_ptr<Region>(region)));
+
+               items.push_back (MenuElem (_("Rename"), sigc::mem_fun(*this, &Editor::rename_region)));
+               if (mr && internal_editing()) {
+                       items.push_back (MenuElem (_("List editor..."), sigc::mem_fun(*this, &Editor::show_midi_list_editor)));
+               } else {
+                       items.push_back (MenuElem (_("Region editor"), sigc::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 (MenuElem (_("Raise to top layer"), sigc::mem_fun(*this, &Editor::raise_region_to_top)));
+       items.push_back (MenuElem (_("Lower to bottom layer"), sigc::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_point)));
-       items.push_back (MenuElem (_("Remove sync point"), mem_fun(*this, &Editor::remove_region_sync)));
+       items.push_back (MenuElem (_("Define sync point"), sigc::mem_fun(*this, &Editor::set_region_sync_from_edit_point)));
+       if (_edit_point == EditAtMouse) {
+               items.back ().set_sensitive (false);
+       }
+       items.push_back (MenuElem (_("Remove sync point"), sigc::mem_fun(*this, &Editor::remove_region_sync)));
        items.push_back (SeparatorElem());
 
-       items.push_back (MenuElem (_("Audition"), mem_fun(*this, &Editor::play_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)));
+       items.push_back (MenuElem (_("Audition"), sigc::mem_fun(*this, &Editor::play_selected_region)));
+       items.push_back (MenuElem (_("Export"), sigc::mem_fun(*this, &Editor::export_region)));
+       items.push_back (MenuElem (_("Bounce"), sigc::mem_fun(*this, &Editor::bounce_region_selection)));
 
        if (ar) {
-               items.push_back (MenuElem (_("Spectral Analysis"), mem_fun(*this, &Editor::analyze_region_selection)));
+               items.push_back (MenuElem (_("Spectral Analysis"), sigc::mem_fun(*this, &Editor::analyze_region_selection)));
        }
 
        items.push_back (SeparatorElem());
@@ -1968,11 +1726,11 @@ Editor::add_region_context_items (StreamView* sv, boost::shared_ptr<Region> regi
        if (region_to_check->locked()) {
                region_lock_item->set_active();
        }
-       region_lock_item->signal_activate().connect (mem_fun(*this, &Editor::toggle_region_lock));
-       
+       region_lock_item->signal_activate().connect (sigc::mem_fun(*this, &Editor::toggle_region_lock));
+
        items.push_back (CheckMenuElem (_("Glue to Bars&Beats")));
        CheckMenuItem* bbt_glue_item = static_cast<CheckMenuItem*>(&items.back());
-       
+
        switch (region_to_check->positional_lock_style()) {
        case Region::MusicTime:
                bbt_glue_item->set_active (true);
@@ -1981,57 +1739,57 @@ Editor::add_region_context_items (StreamView* sv, boost::shared_ptr<Region> regi
                bbt_glue_item->set_active (false);
                break;
        }
-       
-       bbt_glue_item->signal_activate().connect (bind (mem_fun (*this, &Editor::set_region_lock_style), Region::MusicTime));
-       
+
+       bbt_glue_item->signal_activate().connect (sigc::bind (sigc::mem_fun (*this, &Editor::set_region_lock_style), Region::MusicTime));
+
        items.push_back (CheckMenuElem (_("Mute")));
        CheckMenuItem* region_mute_item = static_cast<CheckMenuItem*>(&items.back());
-       fooc = region_mute_item->signal_activate().connect (mem_fun(*this, &Editor::toggle_region_mute));
+       fooc = region_mute_item->signal_activate().connect (sigc::mem_fun(*this, &Editor::toggle_region_mute));
        if (region_to_check->muted()) {
                fooc.block (true);
                region_mute_item->set_active();
                fooc.block (false);
        }
-       
+
        if (!Profile->get_sae()) {
                items.push_back (CheckMenuElem (_("Opaque")));
                CheckMenuItem* region_opaque_item = static_cast<CheckMenuItem*>(&items.back());
-               fooc = region_opaque_item->signal_activate().connect (mem_fun(*this, &Editor::toggle_region_opaque));
+               fooc = region_opaque_item->signal_activate().connect (sigc::mem_fun(*this, &Editor::toggle_region_opaque));
                if (region_to_check->opaque()) {
                        fooc.block (true);
                        region_opaque_item->set_active();
                        fooc.block (false);
                }
        }
-       
-       items.push_back (CheckMenuElem (_("Original position"), mem_fun(*this, &Editor::naturalize)));
+
+       items.push_back (CheckMenuElem (_("Original position"), sigc::mem_fun(*this, &Editor::naturalize)));
        if (region_to_check->at_natural_position()) {
                items.back().set_sensitive (false);
        }
-       
+
        items.push_back (SeparatorElem());
-       
+
        if (ar) {
-               
+
                RegionView* rv = sv->find_view (ar);
                AudioRegionView* arv = dynamic_cast<AudioRegionView*>(rv);
-               
+
                if (!Profile->get_sae()) {
-                       items.push_back (MenuElem (_("Reset Envelope"), mem_fun(*this, &Editor::reset_region_gain_envelopes)));
+                       items.push_back (MenuElem (_("Reset Envelope"), sigc::mem_fun(*this, &Editor::reset_region_gain_envelopes)));
 
                        items.push_back (CheckMenuElem (_("Envelope Visible")));
                        CheckMenuItem* region_envelope_visible_item = static_cast<CheckMenuItem*> (&items.back());
-                       fooc = region_envelope_visible_item->signal_activate().connect (mem_fun(*this, &Editor::toggle_gain_envelope_visibility));
+                       fooc = region_envelope_visible_item->signal_activate().connect (sigc::mem_fun(*this, &Editor::toggle_gain_envelope_visibility));
                        if (arv->envelope_visible()) {
                                fooc.block (true);
                                region_envelope_visible_item->set_active (true);
                                fooc.block (false);
                        }
-               
+
                        items.push_back (CheckMenuElem (_("Envelope Active")));
                        CheckMenuItem* region_envelope_active_item = static_cast<CheckMenuItem*> (&items.back());
-                       fooc = region_envelope_active_item->signal_activate().connect (mem_fun(*this, &Editor::toggle_gain_envelope_active));
-                       
+                       fooc = region_envelope_active_item->signal_activate().connect (sigc::mem_fun(*this, &Editor::toggle_gain_envelope_active));
+
                        if (ar->envelope_active()) {
                                fooc.block (true);
                                region_envelope_active_item->set_active (true);
@@ -2041,42 +1799,41 @@ Editor::add_region_context_items (StreamView* sv, boost::shared_ptr<Region> regi
                        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 (_("Normalize"), sigc::mem_fun(*this, &Editor::normalize_region)));
+               if (ar->scale_amplitude() != 1) {
+                       items.push_back (MenuElem (_("Reset Gain"), sigc::mem_fun(*this, &Editor::reset_region_scale_amplitude)));
                }
 
        } else if (mr) {
-               items.push_back (MenuElem (_("Quantize"), mem_fun(*this, &Editor::quantize_region)));
+               items.push_back (MenuElem (_("Quantize"), sigc::mem_fun(*this, &Editor::quantize_region)));
                items.push_back (SeparatorElem());
        }
 
-       items.push_back (MenuElem (_("Strip silence..."), mem_fun (*this, &Editor::strip_region_silence)));
-       items.push_back (MenuElem (_("Reverse"), mem_fun(*this, &Editor::reverse_region)));
+       items.push_back (MenuElem (_("Strip Silence..."), sigc::mem_fun (*this, &Editor::strip_region_silence)));
+       items.push_back (MenuElem (_("Reverse"), sigc::mem_fun(*this, &Editor::reverse_region)));
        items.push_back (SeparatorElem());
 
        /* range related stuff */
 
-       items.push_back (MenuElem (_("Add Single Range"), mem_fun (*this, &Editor::add_location_from_audio_region)));
-       items.push_back (MenuElem (_("Add Range Markers"), mem_fun (*this, &Editor::add_locations_from_audio_region)));
+       items.push_back (MenuElem (_("Add Single Range"), sigc::mem_fun (*this, &Editor::add_location_from_audio_region)));
+       items.push_back (MenuElem (_("Add Range Markers"), sigc::mem_fun (*this, &Editor::add_locations_from_audio_region)));
        if (selection->regions.size() < 2) {
                items.back().set_sensitive (false);
        }
 
-       items.push_back (MenuElem (_("Set Range Selection"), mem_fun (*this, &Editor::set_selection_from_region)));
+       items.push_back (MenuElem (_("Set Range Selection"), sigc::mem_fun (*this, &Editor::set_selection_from_region)));
        items.push_back (SeparatorElem());
-                        
+
        /* Nudge region */
 
        Menu *nudge_menu = manage (new Menu());
        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, false))));
-       nudge_items.push_back (MenuElem (_("Nudge bwd"), (bind (mem_fun(*this, &Editor::nudge_backward), false, 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 fwd"), (sigc::bind (sigc::mem_fun(*this, &Editor::nudge_forward), false, false))));
+       nudge_items.push_back (MenuElem (_("Nudge bwd"), (sigc::bind (sigc::mem_fun(*this, &Editor::nudge_backward), false, false))));
+       nudge_items.push_back (MenuElem (_("Nudge fwd by capture offset"), (sigc::mem_fun(*this, &Editor::nudge_forward_capture_offset))));
+       nudge_items.push_back (MenuElem (_("Nudge bwd by capture offset"), (sigc::mem_fun(*this, &Editor::nudge_backward_capture_offset))));
 
        items.push_back (MenuElem (_("Nudge"), *nudge_menu));
        items.push_back (SeparatorElem());
@@ -2084,38 +1841,38 @@ Editor::add_region_context_items (StreamView* sv, boost::shared_ptr<Region> regi
        Menu *trim_menu = manage (new Menu);
        MenuList& trim_items = trim_menu->items();
        trim_menu->set_name ("ArdourContextMenu");
-       
-       trim_items.push_back (MenuElem (_("Start to edit point"), mem_fun(*this, &Editor::trim_region_from_edit_point)));
+
+       trim_items.push_back (MenuElem (_("Start to edit point"), sigc::mem_fun(*this, &Editor::trim_region_from_edit_point)));
        foo_item = &trim_items.back();
        if (_edit_point == EditAtMouse) {
                foo_item->set_sensitive (false);
        }
-       trim_items.push_back (MenuElem (_("Edit point to end"), mem_fun(*this, &Editor::trim_region_to_edit_point)));
+       trim_items.push_back (MenuElem (_("Edit point to end"), sigc::mem_fun(*this, &Editor::trim_region_to_edit_point)));
        foo_item = &trim_items.back();
        if (_edit_point == EditAtMouse) {
                foo_item->set_sensitive (false);
        }
-       trim_items.push_back (MenuElem (_("Trim To Loop"), mem_fun(*this, &Editor::trim_region_to_loop)));
-       trim_items.push_back (MenuElem (_("Trim To Punch"), mem_fun(*this, &Editor::trim_region_to_punch)));
-                            
+       trim_items.push_back (MenuElem (_("Trim To Loop"), sigc::mem_fun(*this, &Editor::trim_region_to_loop)));
+       trim_items.push_back (MenuElem (_("Trim To Punch"), sigc::mem_fun(*this, &Editor::trim_region_to_punch)));
+
        items.push_back (MenuElem (_("Trim"), *trim_menu));
        items.push_back (SeparatorElem());
 
-       items.push_back (MenuElem (_("Split"), (mem_fun(*this, &Editor::split_region))));
+       items.push_back (MenuElem (_("Split"), (sigc::mem_fun(*this, &Editor::split))));
        region_edit_menu_split_item = &items.back();
-       
+
        if (_edit_point == EditAtMouse) {
                region_edit_menu_split_item->set_sensitive (false);
        }
 
-       items.push_back (MenuElem (_("Make mono regions"), (mem_fun(*this, &Editor::split_multichannel_region))));
+       items.push_back (MenuElem (_("Make mono regions"), (sigc::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), false))));
-       items.push_back (MenuElem (_("Multi-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 (_("Duplicate"), (sigc::bind (sigc::mem_fun(*this, &Editor::duplicate_dialog), false))));
+       items.push_back (MenuElem (_("Multi-Duplicate"), (sigc::bind (sigc::mem_fun(*this, &Editor::duplicate_dialog), true))));
+       items.push_back (MenuElem (_("Fill Track"), (sigc::mem_fun(*this, &Editor::region_fill_track))));
        items.push_back (SeparatorElem());
-       items.push_back (MenuElem (_("Remove"), mem_fun(*this, &Editor::remove_selected_regions)));
+       items.push_back (MenuElem (_("Remove"), sigc::mem_fun(*this, &Editor::remove_selected_regions)));
 
        /* OK, stick the region submenu at the top of the list, and then add
           the standard items.
@@ -2132,7 +1889,7 @@ Editor::add_region_context_items (StreamView* sv, boost::shared_ptr<Region> regi
                menu_item_name.replace (pos, 1, "__");
                pos += 2;
        }
-       
+
        edit_items.push_back (MenuElem (menu_item_name, *region_menu));
        edit_items.push_back (SeparatorElem());
 }
@@ -2145,43 +1902,46 @@ Editor::add_selection_context_items (Menu_Helpers::MenuList& edit_items)
 {
        using namespace Menu_Helpers;
 
-       edit_items.push_back (MenuElem (_("Play range"), mem_fun(*this, &Editor::play_selection)));
-       edit_items.push_back (MenuElem (_("Loop range"), bind (mem_fun(*this, &Editor::set_loop_from_selection), true)));
+       edit_items.push_back (MenuElem (_("Play Range"), sigc::mem_fun(*this, &Editor::play_selection)));
+       edit_items.push_back (MenuElem (_("Loop Range"), sigc::bind (sigc::mem_fun(*this, &Editor::set_loop_from_selection), true)));
 
        edit_items.push_back (SeparatorElem());
-       edit_items.push_back (MenuElem (_("Spectral Analysis"), mem_fun(*this, &Editor::analyze_range_selection)));
-       
+       edit_items.push_back (MenuElem (_("Spectral Analysis"), sigc::mem_fun(*this, &Editor::analyze_range_selection)));
+
+       if (!selection->regions.empty()) {
+               edit_items.push_back (SeparatorElem());
+               edit_items.push_back (MenuElem (_("Extend Range to End of Region"), sigc::bind (sigc::mem_fun(*this, &Editor::extend_selection_to_end_of_region), false)));
+               edit_items.push_back (MenuElem (_("Extend Range to Start of Region"), sigc::bind (sigc::mem_fun(*this, &Editor::extend_selection_to_start_of_region), false)));
+       }
+
        edit_items.push_back (SeparatorElem());
-       edit_items.push_back (MenuElem (_("Extend Range to End of Region"), bind (mem_fun(*this, &Editor::extend_selection_to_end_of_region), false)));
-       edit_items.push_back (MenuElem (_("Extend Range to Start of Region"), bind (mem_fun(*this, &Editor::extend_selection_to_start_of_region), false)));
+       edit_items.push_back (MenuElem (_("Silence Range"), sigc::mem_fun(*this, &Editor::separate_region_from_selection)));
+       edit_items.push_back (MenuElem (_("Convert to Region in Region List"), sigc::mem_fun(*this, &Editor::new_region_from_selection)));
 
        edit_items.push_back (SeparatorElem());
-       edit_items.push_back (MenuElem (_("Convert to region in-place"), mem_fun(*this, &Editor::separate_region_from_selection)));
-       edit_items.push_back (MenuElem (_("Convert to region in region list"), mem_fun(*this, &Editor::new_region_from_selection)));
-       
+       edit_items.push_back (MenuElem (_("Select All in Range"), sigc::mem_fun(*this, &Editor::select_all_selectables_using_time_selection)));
+
        edit_items.push_back (SeparatorElem());
-       edit_items.push_back (MenuElem (_("Select all in range"), mem_fun(*this, &Editor::select_all_selectables_using_time_selection)));
+       edit_items.push_back (MenuElem (_("Set Loop from Range"), sigc::bind (sigc::mem_fun(*this, &Editor::set_loop_from_selection), false)));
+       edit_items.push_back (MenuElem (_("Set Punch from Range"), sigc::mem_fun(*this, &Editor::set_punch_from_selection)));
 
        edit_items.push_back (SeparatorElem());
-       edit_items.push_back (MenuElem (_("Set loop from selection"), bind (mem_fun(*this, &Editor::set_loop_from_selection), false)));
-       edit_items.push_back (MenuElem (_("Set punch from selection"), mem_fun(*this, &Editor::set_punch_from_selection)));
-       
-       edit_items.push_back (SeparatorElem());
-       edit_items.push_back (MenuElem (_("Add Range Markers"), mem_fun (*this, &Editor::add_location_from_selection)));
+       edit_items.push_back (MenuElem (_("Add Range Markers"), sigc::mem_fun (*this, &Editor::add_location_from_selection)));
+
        edit_items.push_back (SeparatorElem());
-       edit_items.push_back (MenuElem (_("Crop region to range"), mem_fun(*this, &Editor::crop_region_to_selection)));
-       edit_items.push_back (MenuElem (_("Fill range with region"), mem_fun(*this, &Editor::region_fill_selection)));
-       edit_items.push_back (MenuElem (_("Duplicate range"), bind (mem_fun(*this, &Editor::duplicate_dialog), false)));
-       edit_items.push_back (MenuElem (_("Create chunk from range"), mem_fun(*this, &Editor::create_named_selection)));
+       edit_items.push_back (MenuElem (_("Crop Region to Range"), sigc::mem_fun(*this, &Editor::crop_region_to_selection)));
+       edit_items.push_back (MenuElem (_("Fill Range with Region"), sigc::mem_fun(*this, &Editor::region_fill_selection)));
+       edit_items.push_back (MenuElem (_("Duplicate Range"), sigc::bind (sigc::mem_fun(*this, &Editor::duplicate_dialog), false)));
+
        edit_items.push_back (SeparatorElem());
-       edit_items.push_back (MenuElem (_("Consolidate range"), bind (mem_fun(*this, &Editor::bounce_range_selection), true, false)));
-       edit_items.push_back (MenuElem (_("Consolidate range with processing"), bind (mem_fun(*this, &Editor::bounce_range_selection), true, true)));
-       edit_items.push_back (MenuElem (_("Bounce range to region list"), bind (mem_fun(*this, &Editor::bounce_range_selection), false, false)));
-       edit_items.push_back (MenuElem (_("Bounce range to region list with processing"), bind (mem_fun(*this, &Editor::bounce_range_selection), false, true)));
-       edit_items.push_back (MenuElem (_("Export range"), mem_fun(*this, &Editor::export_range)));
+       edit_items.push_back (MenuElem (_("Consolidate Range"), sigc::bind (sigc::mem_fun(*this, &Editor::bounce_range_selection), true, false)));
+       edit_items.push_back (MenuElem (_("Consolidate Range With Processing"), sigc::bind (sigc::mem_fun(*this, &Editor::bounce_range_selection), true, true)));
+       edit_items.push_back (MenuElem (_("Bounce Range to Region List"), sigc::bind (sigc::mem_fun(*this, &Editor::bounce_range_selection), false, false)));
+       edit_items.push_back (MenuElem (_("Bounce Range to Region List With Processing"), sigc::bind (sigc::mem_fun(*this, &Editor::bounce_range_selection), false, true)));
+       edit_items.push_back (MenuElem (_("Export Range"), sigc::mem_fun(*this, &Editor::export_range)));
 }
 
-       
+
 void
 Editor::add_dstream_context_items (Menu_Helpers::MenuList& edit_items)
 {
@@ -2192,13 +1952,13 @@ Editor::add_dstream_context_items (Menu_Helpers::MenuList& edit_items)
        Menu *play_menu = manage (new Menu);
        MenuList& play_items = play_menu->items();
        play_menu->set_name ("ArdourContextMenu");
-       
-       play_items.push_back (MenuElem (_("Play from edit point"), mem_fun(*this, &Editor::play_from_edit_point)));
-       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 (MenuElem (_("Play from edit point"), sigc::mem_fun(*this, &Editor::play_from_edit_point)));
+       play_items.push_back (MenuElem (_("Play from start"), sigc::mem_fun(*this, &Editor::play_from_start)));
+       play_items.push_back (MenuElem (_("Play region"), sigc::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)));
-       
+       play_items.push_back (MenuElem (_("Loop Region"), sigc::mem_fun(*this, &Editor::loop_selected_region)));
+
        edit_items.push_back (MenuElem (_("Play"), *play_menu));
 
        /* Selection */
@@ -2206,24 +1966,22 @@ 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");
-       
-       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());
-       select_items.push_back (MenuElem (_("Select All After Edit Point"), bind (mem_fun(*this, &Editor::select_all_selectables_using_edit), true)));
-       select_items.push_back (MenuElem (_("Select All Before Edit Point"), bind (mem_fun(*this, &Editor::select_all_selectables_using_edit), 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 Playhead & Edit Point"), bind (mem_fun(*this, &Editor::select_all_selectables_between), false)));
-       select_items.push_back (MenuElem (_("Select All Within Playhead & Edit Point"), bind (mem_fun(*this, &Editor::select_all_selectables_between), true)));
-       select_items.push_back (MenuElem (_("Select Range Between Playhead & Edit Point"), mem_fun(*this, &Editor::select_range_between)));
 
+       select_items.push_back (MenuElem (_("Select All in track"), sigc::bind (sigc::mem_fun(*this, &Editor::select_all_in_track), Selection::Set)));
+       select_items.push_back (MenuElem (_("Select All"), sigc::bind (sigc::mem_fun(*this, &Editor::select_all), Selection::Set)));
+       select_items.push_back (MenuElem (_("Invert selection in track"), sigc::mem_fun(*this, &Editor::invert_selection_in_track)));
+       select_items.push_back (MenuElem (_("Invert selection"), sigc::mem_fun(*this, &Editor::invert_selection)));
        select_items.push_back (SeparatorElem());
+       select_items.push_back (MenuElem (_("Set range to loop range"), sigc::mem_fun(*this, &Editor::set_selection_from_loop)));
+       select_items.push_back (MenuElem (_("Set range to punch range"), sigc::mem_fun(*this, &Editor::set_selection_from_punch)));
+       select_items.push_back (SeparatorElem());
+       select_items.push_back (MenuElem (_("Select All After Edit Point"), sigc::bind (sigc::mem_fun(*this, &Editor::select_all_selectables_using_edit), true)));
+       select_items.push_back (MenuElem (_("Select All Before Edit Point"), sigc::bind (sigc::mem_fun(*this, &Editor::select_all_selectables_using_edit), false)));
+       select_items.push_back (MenuElem (_("Select All After Playhead"), sigc::bind (sigc::mem_fun(*this, &Editor::select_all_selectables_using_cursor), playhead_cursor, true)));
+       select_items.push_back (MenuElem (_("Select All Before Playhead"), sigc::bind (sigc::mem_fun(*this, &Editor::select_all_selectables_using_cursor), playhead_cursor, false)));
+       select_items.push_back (MenuElem (_("Select All Between Playhead & Edit Point"), sigc::bind (sigc::mem_fun(*this, &Editor::select_all_selectables_between), false)));
+       select_items.push_back (MenuElem (_("Select All Within Playhead & Edit Point"), sigc::bind (sigc::mem_fun(*this, &Editor::select_all_selectables_between), true)));
+       select_items.push_back (MenuElem (_("Select Range Between Playhead & Edit Point"), sigc::mem_fun(*this, &Editor::select_range_between)));
 
        edit_items.push_back (MenuElem (_("Select"), *select_menu));
 
@@ -2232,39 +1990,37 @@ 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"), bind (mem_fun(*this, &Editor::paste), 1.0f)));
+
+       cutnpaste_items.push_back (MenuElem (_("Cut"), sigc::mem_fun(*this, &Editor::cut)));
+       cutnpaste_items.push_back (MenuElem (_("Copy"), sigc::mem_fun(*this, &Editor::copy)));
+       cutnpaste_items.push_back (MenuElem (_("Paste"), sigc::bind (sigc::mem_fun(*this, &Editor::paste), 1.0f)));
 
        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 (_("Align"), sigc::bind (sigc::mem_fun(*this, &Editor::align), ARDOUR::SyncPoint)));
+       cutnpaste_items.push_back (MenuElem (_("Align Relative"), sigc::bind (sigc::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 */
-       
+
        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 Media"), bind (mem_fun(*this, &Editor::add_external_audio_action), ImportToTrack)));
+       edit_items.push_back (MenuElem (_("Insert Selected Region"), sigc::bind (sigc::mem_fun(*this, &Editor::insert_region_list_selection), 1.0f)));
+       edit_items.push_back (MenuElem (_("Insert Existing Media"), sigc::bind (sigc::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");
-       
+
        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 point 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 point bwd"), (bind (mem_fun(*this, &Editor::nudge_track), true, false))));
+       nudge_items.push_back (MenuElem (_("Nudge entire track fwd"), (sigc::bind (sigc::mem_fun(*this, &Editor::nudge_track), false, true))));
+       nudge_items.push_back (MenuElem (_("Nudge track after edit point fwd"), (sigc::bind (sigc::mem_fun(*this, &Editor::nudge_track), true, true))));
+       nudge_items.push_back (MenuElem (_("Nudge entire track bwd"), (sigc::bind (sigc::mem_fun(*this, &Editor::nudge_track), false, false))));
+       nudge_items.push_back (MenuElem (_("Nudge track after edit point bwd"), (sigc::bind (sigc::mem_fun(*this, &Editor::nudge_track), true, false))));
 
        edit_items.push_back (MenuElem (_("Nudge"), *nudge_menu));
 }
@@ -2279,9 +2035,9 @@ Editor::add_bus_context_items (Menu_Helpers::MenuList& edit_items)
        Menu *play_menu = manage (new Menu);
        MenuList& play_items = play_menu->items();
        play_menu->set_name ("ArdourContextMenu");
-       
-       play_items.push_back (MenuElem (_("Play from edit point"), mem_fun(*this, &Editor::play_from_edit_point)));
-       play_items.push_back (MenuElem (_("Play from start"), mem_fun(*this, &Editor::play_from_start)));
+
+       play_items.push_back (MenuElem (_("Play from edit point"), sigc::mem_fun(*this, &Editor::play_from_edit_point)));
+       play_items.push_back (MenuElem (_("Play from start"), sigc::mem_fun(*this, &Editor::play_from_start)));
        edit_items.push_back (MenuElem (_("Play"), *play_menu));
 
        /* Selection */
@@ -2289,16 +2045,16 @@ Editor::add_bus_context_items (Menu_Helpers::MenuList& edit_items)
        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 (MenuElem (_("Select All in track"), sigc::bind (sigc::mem_fun(*this, &Editor::select_all_in_track), Selection::Set)));
+       select_items.push_back (MenuElem (_("Select All"), sigc::bind (sigc::mem_fun(*this, &Editor::select_all), Selection::Set)));
+       select_items.push_back (MenuElem (_("Invert selection in track"), sigc::mem_fun(*this, &Editor::invert_selection_in_track)));
+       select_items.push_back (MenuElem (_("Invert selection"), sigc::mem_fun(*this, &Editor::invert_selection)));
        select_items.push_back (SeparatorElem());
-       select_items.push_back (MenuElem (_("Select all after edit point"), bind (mem_fun(*this, &Editor::select_all_selectables_using_edit), true)));
-       select_items.push_back (MenuElem (_("Select all before edit point"), bind (mem_fun(*this, &Editor::select_all_selectables_using_edit), 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 after edit point"), sigc::bind (sigc::mem_fun(*this, &Editor::select_all_selectables_using_edit), true)));
+       select_items.push_back (MenuElem (_("Select all before edit point"), sigc::bind (sigc::mem_fun(*this, &Editor::select_all_selectables_using_edit), false)));
+       select_items.push_back (MenuElem (_("Select all after playhead"), sigc::bind (sigc::mem_fun(*this, &Editor::select_all_selectables_using_cursor), playhead_cursor, true)));
+       select_items.push_back (MenuElem (_("Select all before playhead"), sigc::bind (sigc::mem_fun(*this, &Editor::select_all_selectables_using_cursor), playhead_cursor, false)));
 
        edit_items.push_back (MenuElem (_("Select"), *select_menu));
 
@@ -2307,36 +2063,48 @@ Editor::add_bus_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"), bind (mem_fun(*this, &Editor::paste), 1.0f)));
+
+       cutnpaste_items.push_back (MenuElem (_("Cut"), sigc::mem_fun(*this, &Editor::cut)));
+       cutnpaste_items.push_back (MenuElem (_("Copy"), sigc::mem_fun(*this, &Editor::copy)));
+       cutnpaste_items.push_back (MenuElem (_("Paste"), sigc::bind (sigc::mem_fun(*this, &Editor::paste), 1.0f)));
 
        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 point 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 point bwd"), (bind (mem_fun(*this, &Editor::nudge_track), true, false))));
+       nudge_items.push_back (MenuElem (_("Nudge entire track fwd"), (sigc::bind (sigc::mem_fun(*this, &Editor::nudge_track), false, true))));
+       nudge_items.push_back (MenuElem (_("Nudge track after edit point fwd"), (sigc::bind (sigc::mem_fun(*this, &Editor::nudge_track), true, true))));
+       nudge_items.push_back (MenuElem (_("Nudge entire track bwd"), (sigc::bind (sigc::mem_fun(*this, &Editor::nudge_track), false, false))));
+       nudge_items.push_back (MenuElem (_("Nudge track after edit point bwd"), (sigc::bind (sigc::mem_fun(*this, &Editor::nudge_track), true, false))));
 
        edit_items.push_back (MenuElem (_("Nudge"), *nudge_menu));
 }
 
+SnapType
+Editor::snap_type() const
+{
+       return _snap_type;
+}
+
+SnapMode
+Editor::snap_mode() const
+{
+       return _snap_mode;
+}
+
 void
 Editor::set_snap_to (SnapType st)
 {
        unsigned int snap_ind = (unsigned int)st;
 
-       snap_type = st;
-       
+       _snap_type = st;
+
        if (snap_ind > snap_type_strings.size() - 1) {
                snap_ind = 0;
-               snap_type = (SnapType)snap_ind;
+               _snap_type = (SnapType)snap_ind;
        }
-       
+
        string str = snap_type_strings[snap_ind];
 
        if (str != snap_type_selector.get_active_text()) {
@@ -2345,7 +2113,7 @@ Editor::set_snap_to (SnapType st)
 
        instant_save ();
 
-       switch (snap_type) {
+       switch (_snap_type) {
        case SnapToAThirtysecondBeat:
        case SnapToASixteenthBeat:
        case SnapToAEighthBeat:
@@ -2371,7 +2139,7 @@ Editor::set_snap_to (SnapType st)
 void
 Editor::set_snap_mode (SnapMode mode)
 {
-       snap_mode = mode;
+       _snap_mode = mode;
        string str = snap_mode_strings[(int)mode];
 
        if (str != snap_mode_selector.get_active_text ()) {
@@ -2398,26 +2166,6 @@ Editor::set_edit_point_preference (EditPoint ep, bool force)
                return;
        }
 
-       switch (zoom_focus) {
-       case ZoomFocusMouse:
-       case ZoomFocusPlayhead:
-       case ZoomFocusEdit:
-               switch (_edit_point) {
-               case EditAtMouse:
-                       set_zoom_focus (ZoomFocusMouse);
-                       break;
-               case EditAtPlayhead:
-                       set_zoom_focus (ZoomFocusPlayhead);
-                       break;
-               case EditAtSelectedMarker:
-                       set_zoom_focus (ZoomFocusEdit);
-                       break;
-               }
-               break;
-       default:
-               break;
-       }
-
        const char* action=NULL;
 
        switch (_edit_point) {
@@ -2450,7 +2198,7 @@ Editor::set_edit_point_preference (EditPoint ep, bool force)
 }
 
 int
-Editor::set_state (const XMLNode& node)
+Editor::set_state (const XMLNode& node, int /*version*/)
 {
        const XMLProperty* prop;
        XMLNode* geometry;
@@ -2516,21 +2264,13 @@ Editor::set_state (const XMLNode& node)
        set_default_size (g.base_width, g.base_height);
        move (x, y);
 
-       if (session && (prop = node.property ("playhead"))) {
+       if (_session && (prop = node.property ("playhead"))) {
                nframes64_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 ((prop = node.property ("mixer-width"))) {
                editor_mixer_strip_width = Width (string_2_enum (prop->value(), editor_mixer_strip_width));
        }
@@ -2551,10 +2291,6 @@ Editor::set_state (const XMLNode& node)
                set_snap_mode ((SnapMode) atoi (prop->value()));
        }
 
-       if ((prop = node.property ("edit-point"))) {
-               set_edit_point_preference ((EditPoint) string_2_enum (prop->value(), _edit_point), true);
-       }
-
        if ((prop = node.property ("mouse-mode"))) {
                MouseMode m = str2mousemode(prop->value());
                mouse_mode = MouseMode ((int) m + 1); /* lie, force mode switch */
@@ -2564,20 +2300,31 @@ Editor::set_state (const XMLNode& node)
                set_mouse_mode (MouseObject, true);
        }
 
-       if ((prop = node.property ("show-waveforms"))) {
-               bool yn = (prop->value() == "yes");
-               _show_waveforms = !yn;
-               RefPtr<Action> act = ActionManager::get_action (X_("Editor"), X_("toggle-waveform-visible"));
+       if ((prop = node.property ("left-frame")) != 0){
+               nframes64_t pos;
+               if (sscanf (prop->value().c_str(), "%" PRId64, &pos) == 1) {
+                       reset_x_origin (pos);
+                       /* this hack prevents the initial call to update_current_screen() from doing re-centering on the playhead */
+                       last_update_frame = pos;
+               }
+       }
+
+       if ((prop = node.property ("internal-edit"))) {
+               bool yn = string_is_affirmative (prop->value());
+               RefPtr<Action> act = ActionManager::get_action (X_("MouseMode"), X_("toggle-internal-edit"));
                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 ((prop = node.property ("edit-point"))) {
+               set_edit_point_preference ((EditPoint) string_2_enum (prop->value(), _edit_point), true);
+       }
+
        if ((prop = node.property ("show-waveforms-recording"))) {
-               bool yn = (prop->value() == "yes");
+               bool yn = string_is_affirmative (prop->value());
                _show_waveforms_recording = !yn;
                RefPtr<Action> act = ActionManager::get_action (X_("Editor"), X_("ToggleWaveformsWhileRecording"));
                if (act) {
@@ -2587,9 +2334,9 @@ Editor::set_state (const XMLNode& node)
                        tact->set_active (yn);
                }
        }
-       
+
        if ((prop = node.property ("show-measures"))) {
-               bool yn = (prop->value() == "yes");
+               bool yn = string_is_affirmative (prop->value());
                _show_measures = !yn;
                RefPtr<Action> act = ActionManager::get_action (X_("Editor"), X_("ToggleMeasureVisibility"));
                if (act) {
@@ -2601,7 +2348,7 @@ Editor::set_state (const XMLNode& node)
        }
 
        if ((prop = node.property ("follow-playhead"))) {
-               bool yn = (prop->value() == "yes");
+               bool yn = string_is_affirmative (prop->value());
                set_follow_playhead (yn);
                RefPtr<Action> act = ActionManager::get_action (X_("Editor"), X_("toggle-follow-playhead"));
                if (act) {
@@ -2613,12 +2360,11 @@ Editor::set_state (const XMLNode& node)
        }
 
        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()));
+               _regions->reset_sort_type (str2regionlistsorttype(prop->value()), true);
        }
 
        if ((prop = node.property ("xfades-visible"))) {
-               bool yn = (prop->value() == "yes");
+               bool yn = string_is_affirmative (prop->value());
                _xfade_visibility = !yn;
                // set_xfade_visibility (yn);
        }
@@ -2629,15 +2375,15 @@ Editor::set_state (const XMLNode& node)
                if (act) {
 
                        Glib::RefPtr<ToggleAction> tact = Glib::RefPtr<ToggleAction>::cast_dynamic(act);
-                       bool yn = (prop->value() == X_("yes"));
+                       bool yn = string_is_affirmative (prop->value());
 
                        /* do it twice to force the change */
-                       
+
                        tact->set_active (!yn);
                        tact->set_active (yn);
                }
        }
-       
+
        if ((prop = node.property ("show-editor-list"))) {
 
                Glib::RefPtr<Action> act = ActionManager::get_action (X_("Editor"), X_("show-editor-list"));
@@ -2645,10 +2391,10 @@ Editor::set_state (const XMLNode& node)
                if (act) {
 
                        Glib::RefPtr<ToggleAction> tact = Glib::RefPtr<ToggleAction>::cast_dynamic(act);
-                       bool yn = (prop->value() == X_("yes"));
+                       bool yn = string_is_affirmative (prop->value());
 
                        /* do it twice to force the change */
-                       
+
                        tact->set_active (!yn);
                        tact->set_active (yn);
                }
@@ -2666,15 +2412,15 @@ Editor::get_state ()
 
        _id.print (buf, sizeof (buf));
        node->add_property ("id", buf);
-       
+
        if (is_realized()) {
                Glib::RefPtr<Gdk::Window> win = get_window();
-               
+
                int x, y, xoff, yoff, width, height;
                win->get_root_origin(x, y);
                win->get_position(xoff, yoff);
                win->get_size(width, height);
-               
+
                XMLNode* geometry = new XMLNode ("geometry");
 
                snprintf(buf, sizeof(buf), "%d", width);
@@ -2696,35 +2442,37 @@ Editor::get_state ()
        }
 
        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);
        node->add_property ("zoom", buf);
-       snprintf (buf, sizeof(buf), "%d", (int) snap_type);
+       snprintf (buf, sizeof(buf), "%d", (int) _snap_type);
        node->add_property ("snap-to", buf);
-       snprintf (buf, sizeof(buf), "%d", (int) snap_mode);
+       snprintf (buf, sizeof(buf), "%d", (int) _snap_mode);
        node->add_property ("snap-mode", buf);
 
        node->add_property ("edit-point", enum_2_string (_edit_point));
 
        snprintf (buf, sizeof (buf), "%" PRIi64, playhead_cursor->current_frame);
        node->add_property ("playhead", buf);
+       snprintf (buf, sizeof (buf), "%" PRIi64, leftmost_frame);
+       node->add_property ("left-frame", 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");
        node->add_property ("follow-playhead", _follow_playhead ? "yes" : "no");
        node->add_property ("xfades-visible", _xfade_visibility ? "yes" : "no");
-       node->add_property ("region-list-sort-type", enum2str(region_list_sort_type));
+       node->add_property ("region-list-sort-type", enum2str (_regions->sort_type ()));
        node->add_property ("mouse-mode", enum2str(mouse_mode));
-       
+       node->add_property ("internal-edit", _internal_editing ? "yes" : "no");
+
        Glib::RefPtr<Action> act = ActionManager::get_action (X_("Editor"), X_("show-editor-mixer"));
        if (act) {
                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);
@@ -2755,86 +2503,123 @@ Editor::trackview_by_y_position (double y)
        return std::make_pair ( (TimeAxisView *) 0, 0);
 }
 
+/** Snap a position to the grid, if appropriate, taking into account current
+ *  grid settings and also the state of any snap modifier keys that may be pressed.
+ *  @param start Position to snap.
+ *  @param event Event to get current key modifier information from.
+ */
 void
-Editor::snap_to (nframes64_t& start, int32_t direction, bool for_mark)
+Editor::snap_to_with_modifier (nframes64_t& start, GdkEvent const * event, int32_t direction, bool for_mark)
 {
-       if (!session || snap_mode == SnapOff) {
+       if (!_session) {
                return;
        }
 
-       snap_to_internal (start, direction, for_mark);
+       if (Keyboard::modifier_state_contains (event->button.state, Keyboard::snap_modifier())) {
+               if (_snap_mode == SnapOff) {
+                       snap_to_internal (start, direction, for_mark);
+               }
+       } else {
+               if (_snap_mode != SnapOff) {
+                       snap_to_internal (start, direction, for_mark);
+               }
+       }
 }
 
 void
-Editor::snap_to_internal (nframes64_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;
+       if (!_session || _snap_mode == SnapOff) {
+               return;
+       }
 
-       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;
+       snap_to_internal (start, direction, for_mark);
+}
 
-       switch (snap_type) {
-       case SnapToCDFrame:
-               if (((direction == 0) && (start % (one_second/75) > (one_second/75) / 2)) || (direction > 0)) {
-                       start = (nframes64_t) ceil ((double) start / (one_second / 75)) * (one_second / 75);
-               } else {
-                       start = (nframes64_t) floor ((double) start / (one_second / 75)) * (one_second / 75);
-               }
-               break;
+void
+Editor::timecode_snap_to_internal (nframes64_t& start, int32_t direction, bool /*for_mark*/)
+{
+       const nframes64_t one_timecode_second = (nframes64_t)(rint(_session->timecode_frames_per_second()) * _session->frames_per_timecode_frame());
+       nframes64_t one_timecode_minute = (nframes64_t)(rint(_session->timecode_frames_per_second()) * _session->frames_per_timecode_frame() * 60);
 
-       case SnapToSMPTEFrame:
-               if (((direction == 0) && (fmod((double)start, (double)session->frames_per_smpte_frame()) > (session->frames_per_smpte_frame() / 2))) || (direction > 0)) {
-                       start = (nframes64_t) (ceil ((double) start / session->frames_per_smpte_frame()) * session->frames_per_smpte_frame());
+       switch (_snap_type) {
+       case SnapToTimecodeFrame:
+               if (((direction == 0) && (fmod((double)start, (double)_session->frames_per_timecode_frame()) > (_session->frames_per_timecode_frame() / 2))) || (direction > 0)) {
+                       start = (nframes64_t) (ceil ((double) start / _session->frames_per_timecode_frame()) * _session->frames_per_timecode_frame());
                } else {
-                       start = (nframes64_t) (floor ((double) start / session->frames_per_smpte_frame()) *  session->frames_per_smpte_frame());
+                       start = (nframes64_t) (floor ((double) start / _session->frames_per_timecode_frame()) *  _session->frames_per_timecode_frame());
                }
                break;
 
-       case SnapToSMPTESeconds:
-               if (session->smpte_offset_negative())
+       case SnapToTimecodeSeconds:
+               if (_session->timecode_offset_negative())
                {
-                       start += session->smpte_offset ();
+                       start += _session->timecode_offset ();
                } else {
-                       start -= session->smpte_offset ();
-               }    
-               if (((direction == 0) && (start % one_smpte_second > one_smpte_second / 2)) || direction > 0) {
-                       start = (nframes64_t) ceil ((double) start / one_smpte_second) * one_smpte_second;
+                       start -= _session->timecode_offset ();
+               }
+               if (((direction == 0) && (start % one_timecode_second > one_timecode_second / 2)) || direction > 0) {
+                       start = (nframes64_t) ceil ((double) start / one_timecode_second) * one_timecode_second;
                } else {
-                       start = (nframes64_t) floor ((double) start / one_smpte_second) * one_smpte_second;
+                       start = (nframes64_t) floor ((double) start / one_timecode_second) * one_timecode_second;
                }
-               
-               if (session->smpte_offset_negative())
+
+               if (_session->timecode_offset_negative())
                {
-                       start -= session->smpte_offset ();
+                       start -= _session->timecode_offset ();
                } else {
-                       start += session->smpte_offset ();
+                       start += _session->timecode_offset ();
                }
                break;
-               
-       case SnapToSMPTEMinutes:
-               if (session->smpte_offset_negative())
+
+       case SnapToTimecodeMinutes:
+               if (_session->timecode_offset_negative())
                {
-                       start += session->smpte_offset ();
+                       start += _session->timecode_offset ();
                } else {
-                       start -= session->smpte_offset ();
+                       start -= _session->timecode_offset ();
                }
-               if (((direction == 0) && (start % one_smpte_minute > one_smpte_minute / 2)) || direction > 0) {
-                       start = (nframes64_t) ceil ((double) start / one_smpte_minute) * one_smpte_minute;
+               if (((direction == 0) && (start % one_timecode_minute > one_timecode_minute / 2)) || direction > 0) {
+                       start = (nframes64_t) ceil ((double) start / one_timecode_minute) * one_timecode_minute;
                } else {
-                       start = (nframes64_t) floor ((double) start / one_smpte_minute) * one_smpte_minute;
+                       start = (nframes64_t) floor ((double) start / one_timecode_minute) * one_timecode_minute;
                }
-               if (session->smpte_offset_negative())
+               if (_session->timecode_offset_negative())
                {
-                       start -= session->smpte_offset ();
+                       start -= _session->timecode_offset ();
                } else {
-                       start += session->smpte_offset ();
+                       start += _session->timecode_offset ();
                }
                break;
-               
+       default:
+               fatal << "Editor::smpte_snap_to_internal() called with non-timecode snap type!" << endmsg;
+               /*NOTREACHED*/
+       }
+}
+
+void
+Editor::snap_to_internal (nframes64_t& start, int32_t direction, bool for_mark)
+{
+       const nframes64_t one_second = _session->frame_rate();
+       const nframes64_t one_minute = _session->frame_rate() * 60;
+       nframes64_t presnap = start;
+       nframes64_t before;
+       nframes64_t after;
+
+       switch (_snap_type) {
+       case SnapToTimecodeFrame:
+       case SnapToTimecodeSeconds:
+       case SnapToTimecodeMinutes:
+               return timecode_snap_to_internal (start, direction, for_mark);
+
+       case SnapToCDFrame:
+               if (((direction == 0) && (start % (one_second/75) > (one_second/75) / 2)) || (direction > 0)) {
+                       start = (nframes64_t) ceil ((double) start / (one_second / 75)) * (one_second / 75);
+               } else {
+                       start = (nframes64_t) floor ((double) start / (one_second / 75)) * (one_second / 75);
+               }
+               break;
+
        case SnapToSeconds:
                if (((direction == 0) && (start % one_second > one_second / 2)) || (direction > 0)) {
                        start = (nframes64_t) ceil ((double) start / one_second) * one_second;
@@ -2842,7 +2627,7 @@ Editor::snap_to_internal (nframes64_t& start, int32_t direction, bool for_mark)
                        start = (nframes64_t) floor ((double) start / one_second) * one_second;
                }
                break;
-               
+
        case SnapToMinutes:
                if (((direction == 0) && (start % one_minute > one_minute / 2)) || (direction > 0)) {
                        start = (nframes64_t) ceil ((double) start / one_minute) * one_minute;
@@ -2852,31 +2637,31 @@ Editor::snap_to_internal (nframes64_t& start, int32_t direction, bool for_mark)
                break;
 
        case SnapToBar:
-               start = session->tempo_map().round_to_bar (start, direction);
+               start = _session->tempo_map().round_to_bar (start, direction);
                break;
 
        case SnapToBeat:
-               start = session->tempo_map().round_to_beat (start, direction);
+               start = _session->tempo_map().round_to_beat (start, direction);
                break;
 
        case SnapToAThirtysecondBeat:
-               start = session->tempo_map().round_to_beat_subdivision (start, 32);
+               start = _session->tempo_map().round_to_beat_subdivision (start, 32, direction);
                break;
 
        case SnapToASixteenthBeat:
-               start = session->tempo_map().round_to_beat_subdivision (start, 16);
+               start = _session->tempo_map().round_to_beat_subdivision (start, 16, direction);
                break;
 
        case SnapToAEighthBeat:
-               start = session->tempo_map().round_to_beat_subdivision (start, 8);
+               start = _session->tempo_map().round_to_beat_subdivision (start, 8, direction);
                break;
 
        case SnapToAQuarterBeat:
-               start = session->tempo_map().round_to_beat_subdivision (start, 4);
+               start = _session->tempo_map().round_to_beat_subdivision (start, 4, direction);
                break;
 
        case SnapToAThirdBeat:
-               start = session->tempo_map().round_to_beat_subdivision (start, 3);
+               start = _session->tempo_map().round_to_beat_subdivision (start, 3, direction);
                break;
 
        case SnapToMark:
@@ -2884,39 +2669,21 @@ Editor::snap_to_internal (nframes64_t& start, int32_t direction, bool for_mark)
                        return;
                }
 
-               before = session->locations()->first_location_before (start);
-               after = session->locations()->first_location_after (start);
+               _session->locations()->marks_either_side (start, before, after);
 
-               if (direction < 0) {
-                       if (before) {
-                               start = before->start();
-                       } else {
-                               start = 0;
-                       }
-               } else if (direction > 0) {
-                       if (after) {
-                               start = after->start();
+               if (before == max_frames) {
+                       start = after;
+               } else if (after == max_frames) {
+                       start = before;
+               } else if (before != max_frames && after != max_frames) {
+                       /* have before and after */
+                       if ((start - before) < (after - start)) {
+                               start = before;
                        } else {
-                               start = session->current_end_frame();
-                       }
-               } else {
-                       if (before) {
-                               if (after) {
-                                       /* find nearest of the two */
-                                       if ((start - before->start()) < (after->start() - start)) {
-                                               start = before->start();
-                                       } else {
-                                               start = after->start();
-                                       }
-                               } else {
-                                       start = before->start();
-                               }
-                       } else if (after) {
-                               start = after->start();
-                       } else {
-                               /* relax */
+                               start = after;
                        }
                }
+
                break;
 
        case SnapToRegionStart:
@@ -2924,95 +2691,58 @@ Editor::snap_to_internal (nframes64_t& start, int32_t direction, bool for_mark)
        case SnapToRegionSync:
        case SnapToRegionBoundary:
                if (!region_boundary_cache.empty()) {
-                       vector<nframes64_t>::iterator i;
+
+                       vector<nframes64_t>::iterator prev = region_boundary_cache.end ();
+                       vector<nframes64_t>::iterator next = region_boundary_cache.end ();
 
                        if (direction > 0) {
-                               i = std::upper_bound (region_boundary_cache.begin(), region_boundary_cache.end(), start);
+                               next = std::upper_bound (region_boundary_cache.begin(), region_boundary_cache.end(), start);
                        } else {
-                               i = std::lower_bound (region_boundary_cache.begin(), region_boundary_cache.end(), start);
+                               next = std::lower_bound (region_boundary_cache.begin(), region_boundary_cache.end(), start);
                        }
-                       
-                       if (i != region_boundary_cache.end()) {
-
-                               /* lower bound doesn't quite to the right thing for our purposes */
 
-                               if (direction < 0 && i != region_boundary_cache.begin()) {
-                                       --i;
-                               }
+                       if (next != region_boundary_cache.begin ()) {
+                               prev = next;
+                               prev--;
+                       }
 
-                               start = *i;
+                       nframes64_t const p = (prev == region_boundary_cache.end()) ? region_boundary_cache.front () : *prev;
+                       nframes64_t const n = (next == region_boundary_cache.end()) ? region_boundary_cache.back () : *next;
 
+                       if (start > (p + n) / 2) {
+                               start = n;
                        } else {
-                               start = region_boundary_cache.back();
+                               start = p;
                        }
-               } 
+               }
                break;
        }
 
-       switch (snap_mode) {
+       switch (_snap_mode) {
        case SnapNormal:
-               return;                 
-               
+               return;
+
        case SnapMagnetic:
-               
+
                if (presnap > start) {
                        if (presnap > (start + unit_to_frame(snap_threshold))) {
                                start = presnap;
                        }
-                       
+
                } else if (presnap < start) {
                        if (presnap < (start - unit_to_frame(snap_threshold))) {
                                start = presnap;
                        }
                }
-               
+
        default:
                /* handled at entry */
                return;
-               
-       }
-}
-
-double
-Editor::snap_length_beats (nframes64_t start)
-{
-       if (!session) {
-               return 1.0;
-       }
-
-       /* FIXME: This could/should also work with non-tempo based snap settings (ie seconds) */
-
-       switch (snap_type) {
-       case SnapToBar:
-               return session->tempo_map().meter_at(start).beats_per_bar();
-
-       case SnapToBeat:
-               return 1.0;
-
-       case SnapToAThirtysecondBeat:
-               return 1.0 / (double)32.0;
-               break;
-
-       case SnapToASixteenthBeat:
-               return 1.0 / (double)16.0;
-               break;
-
-       case SnapToAEighthBeat:
-               return 1.0 / (double)8.0;
-               break;
-
-       case SnapToAQuarterBeat:
-               return 1.0 / (double)4.0;
-               break;
 
-       case SnapToAThirdBeat:
-               return 1.0 / (double)3.0;
-
-       default:
-               return 1.0;
        }
 }
 
+
 void
 Editor::setup_toolbar ()
 {
@@ -3020,36 +2750,13 @@ Editor::setup_toolbar ()
 
        /* Mode Buttons (tool selection) */
 
-       vector<ToggleButton *> mouse_mode_buttons;
-
-       mouse_move_button.add (*(manage (new Image (::get_icon("tool_object")))));
        mouse_move_button.set_relief(Gtk::RELIEF_NONE);
-       mouse_mode_buttons.push_back (&mouse_move_button);
-
-       if (!Profile->get_sae()) {
-               mouse_select_button.add (*(manage (new Image (get_xpm("tool_range.xpm")))));
-               mouse_select_button.set_relief(Gtk::RELIEF_NONE);
-               mouse_mode_buttons.push_back (&mouse_select_button);
-
-               mouse_gain_button.add (*(manage (new Image (::get_icon("tool_gain")))));
-               mouse_gain_button.set_relief(Gtk::RELIEF_NONE);
-               mouse_mode_buttons.push_back (&mouse_gain_button);
-       }
-
-       mouse_zoom_button.add (*(manage (new Image (::get_icon("tool_zoom")))));
+       mouse_select_button.set_relief(Gtk::RELIEF_NONE);
+       mouse_gain_button.set_relief(Gtk::RELIEF_NONE);
        mouse_zoom_button.set_relief(Gtk::RELIEF_NONE);
-       mouse_mode_buttons.push_back (&mouse_zoom_button);
-       mouse_timefx_button.add (*(manage (new Image (::get_icon("tool_stretch")))));
        mouse_timefx_button.set_relief(Gtk::RELIEF_NONE);
-       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);
+       // internal_edit_button.set_relief(Gtk::RELIEF_NONE);
 
        HBox* mode_box = manage(new HBox);
        mode_box->set_border_width (2);
@@ -3065,7 +2772,7 @@ Editor::setup_toolbar ()
        }
        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.pack_start(internal_edit_button, true, true);
        mouse_mode_button_box.set_homogeneous(true);
 
        vector<string> edit_mode_strings;
@@ -3077,42 +2784,43 @@ Editor::setup_toolbar ()
 
        edit_mode_selector.set_name ("EditModeSelector");
        set_popdown_strings (edit_mode_selector, edit_mode_strings, true);
-       edit_mode_selector.signal_changed().connect (mem_fun(*this, &Editor::edit_mode_selection_done));
+       edit_mode_selector.signal_changed().connect (sigc::mem_fun(*this, &Editor::edit_mode_selection_done));
 
        mode_box->pack_start(edit_mode_selector);
        mode_box->pack_start(mouse_mode_button_box);
-       
+
        mouse_mode_tearoff = manage (new TearOff (*mode_box));
        mouse_mode_tearoff->set_name ("MouseModeBase");
+       mouse_mode_tearoff->tearoff_window().signal_key_press_event().connect (sigc::bind (sigc::ptr_fun (relay_key_press), &mouse_mode_tearoff->tearoff_window()), false);
 
        if (Profile->get_sae()) {
                mouse_mode_tearoff->set_can_be_torn_off (false);
        }
 
-       mouse_mode_tearoff->Detach.connect (bind (mem_fun(*this, &Editor::detach_tearoff), static_cast<Box*>(&toolbar_hbox), 
+       mouse_mode_tearoff->Detach.connect (sigc::bind (sigc::mem_fun(*this, &Editor::detach_tearoff), static_cast<Box*>(&toolbar_hbox),
                                                  &mouse_mode_tearoff->tearoff_window()));
-       mouse_mode_tearoff->Attach.connect (bind (mem_fun(*this, &Editor::reattach_tearoff), static_cast<Box*> (&toolbar_hbox), 
+       mouse_mode_tearoff->Attach.connect (sigc::bind (sigc::mem_fun(*this, &Editor::reattach_tearoff), static_cast<Box*> (&toolbar_hbox),
                                                  &mouse_mode_tearoff->tearoff_window(), 1));
-       mouse_mode_tearoff->Hidden.connect (bind (mem_fun(*this, &Editor::detach_tearoff), static_cast<Box*>(&toolbar_hbox), 
+       mouse_mode_tearoff->Hidden.connect (sigc::bind (sigc::mem_fun(*this, &Editor::detach_tearoff), static_cast<Box*>(&toolbar_hbox),
                                                  &mouse_mode_tearoff->tearoff_window()));
-       mouse_mode_tearoff->Visible.connect (bind (mem_fun(*this, &Editor::reattach_tearoff), static_cast<Box*> (&toolbar_hbox), 
+       mouse_mode_tearoff->Visible.connect (sigc::bind (sigc::mem_fun(*this, &Editor::reattach_tearoff), static_cast<Box*> (&toolbar_hbox),
                                                   &mouse_mode_tearoff->tearoff_window(), 1));
 
+       mouse_move_button.set_mode (false);
+       mouse_select_button.set_mode (false);
+       mouse_gain_button.set_mode (false);
+       mouse_zoom_button.set_mode (false);
+       mouse_timefx_button.set_mode (false);
+       mouse_audition_button.set_mode (false);
+
        mouse_move_button.set_name ("MouseModeButton");
        mouse_select_button.set_name ("MouseModeButton");
        mouse_gain_button.set_name ("MouseModeButton");
        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"));
-       ARDOUR_UI::instance()->tooltips().set_tip (mouse_gain_button, _("Draw Gain Automation"));
-       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"));
+       internal_edit_button.set_name ("MouseModeButton");
 
        mouse_move_button.unset_flags (CAN_FOCUS);
        mouse_select_button.unset_flags (CAN_FOCUS);
@@ -3120,73 +2828,80 @@ 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));
-
-       mouse_move_button.signal_toggled().connect (bind (mem_fun(*this, &Editor::mouse_mode_toggled), Editing::MouseObject));
-       mouse_gain_button.signal_toggled().connect (bind (mem_fun(*this, &Editor::mouse_mode_toggled), Editing::MouseGain));
-       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);
-       
+       internal_edit_button.unset_flags (CAN_FOCUS);
 
        /* Zoom */
-       
+
        zoom_box.set_spacing (1);
        zoom_box.set_border_width (0);
 
        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));
+       zoom_in_button.set_image (*(manage (new Image (Stock::ZOOM_IN, Gtk::ICON_SIZE_BUTTON))));
+       zoom_in_button.signal_clicked().connect (sigc::bind (sigc::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));
+       zoom_out_button.set_image (*(manage (new Image (Stock::ZOOM_OUT, Gtk::ICON_SIZE_BUTTON))));
+       zoom_out_button.signal_clicked().connect (sigc::bind (sigc::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));
+       zoom_out_full_button.set_image (*(manage (new Image (Stock::ZOOM_100, Gtk::ICON_SIZE_BUTTON))));
+       zoom_out_full_button.signal_clicked().connect (sigc::mem_fun(*this, &Editor::temporal_zoom_session));
        ARDOUR_UI::instance()->tooltips().set_tip (zoom_out_full_button, _("Zoom to Session"));
 
        zoom_focus_selector.set_name ("ZoomFocusSelector");
        set_popdown_strings (zoom_focus_selector, zoom_focus_strings, true);
-       zoom_focus_selector.signal_changed().connect (mem_fun(*this, &Editor::zoom_focus_selection_done));
+       zoom_focus_selector.signal_changed().connect (sigc::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, 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);
 
+       /* Track zoom buttons */
+       tav_expand_button.set_name ("TrackHeightButton");
+       tav_expand_button.set_size_request(-1,20);
+       tav_expand_button.add (*(manage (new Image (::get_icon("tav_exp")))));
+       tav_expand_button.signal_clicked().connect (sigc::bind (sigc::mem_fun(*this, &Editor::tav_zoom_step), true));
+       ARDOUR_UI::instance()->tooltips().set_tip (tav_expand_button, _("Expand Tracks"));
+
+       tav_shrink_button.set_name ("TrackHeightButton");
+       tav_shrink_button.set_size_request(-1,20);
+       tav_shrink_button.add (*(manage (new Image (::get_icon("tav_shrink")))));
+       tav_shrink_button.signal_clicked().connect (sigc::bind (sigc::mem_fun(*this, &Editor::tav_zoom_step), false));
+       ARDOUR_UI::instance()->tooltips().set_tip (tav_shrink_button, _("Shrink Tracks"));
+
+       track_zoom_box.set_spacing (1);
+       track_zoom_box.set_border_width (0);
+
+       track_zoom_box.pack_start (tav_shrink_button, false, false);
+       track_zoom_box.pack_start (tav_expand_button, false, false);
+
+       HBox* zbc = manage (new HBox);
+       zbc->pack_start (zoom_focus_selector, PACK_SHRINK);
+       zoom_vbox.pack_start (*zbc, PACK_SHRINK);
+       zoom_vbox.pack_start (zoom_box, PACK_SHRINK);
+       zoom_vbox.pack_start (track_zoom_box, PACK_SHRINK);
+
        snap_box.set_spacing (1);
        snap_box.set_border_width (2);
 
        snap_type_selector.set_name ("SnapTypeSelector");
        set_popdown_strings (snap_type_selector, snap_type_strings, true);
-       snap_type_selector.signal_changed().connect (mem_fun(*this, &Editor::snap_type_selection_done));
+       snap_type_selector.signal_changed().connect (sigc::mem_fun(*this, &Editor::snap_type_selection_done));
        ARDOUR_UI::instance()->tooltips().set_tip (snap_type_selector, _("Snap/Grid Units"));
 
        snap_mode_selector.set_name ("SnapModeSelector");
        set_popdown_strings (snap_mode_selector, snap_mode_strings, true);
-       snap_mode_selector.signal_changed().connect (mem_fun(*this, &Editor::snap_mode_selection_done));
+       snap_mode_selector.signal_changed().connect (sigc::mem_fun(*this, &Editor::snap_mode_selection_done));
        ARDOUR_UI::instance()->tooltips().set_tip (snap_mode_selector, _("Snap/Grid Mode"));
 
        edit_point_selector.set_name ("EditPointSelector");
        set_popdown_strings (edit_point_selector, edit_point_strings, true);
-       edit_point_selector.signal_changed().connect (mem_fun(*this, &Editor::edit_point_selection_done));
+       edit_point_selector.signal_changed().connect (sigc::mem_fun(*this, &Editor::edit_point_selection_done));
        ARDOUR_UI::instance()->tooltips().set_tip (edit_point_selector, _("Edit point"));
 
-       snap_box.pack_start (edit_point_clock, false, false);
        snap_box.pack_start (snap_mode_selector, false, false);
        snap_box.pack_start (snap_type_selector, false, false);
        snap_box.pack_start (edit_point_selector, false, false);
@@ -3197,8 +2912,8 @@ Editor::setup_toolbar ()
        nudge_box->set_spacing(1);
        nudge_box->set_border_width (2);
 
-       nudge_forward_button.signal_button_release_event().connect (mem_fun(*this, &Editor::nudge_forward_release), false);
-       nudge_backward_button.signal_button_release_event().connect (mem_fun(*this, &Editor::nudge_backward_release), false);
+       nudge_forward_button.signal_button_release_event().connect (sigc::mem_fun(*this, &Editor::nudge_forward_release), false);
+       nudge_backward_button.signal_button_release_event().connect (sigc::mem_fun(*this, &Editor::nudge_backward_release), false);
 
        nudge_box->pack_start (nudge_backward_button, false, false);
        nudge_box->pack_start (nudge_forward_button, false, false);
@@ -3212,18 +2927,19 @@ Editor::setup_toolbar ()
 
        tools_tearoff = manage (new TearOff (*hbox));
        tools_tearoff->set_name ("MouseModeBase");
+       tools_tearoff->tearoff_window().signal_key_press_event().connect (sigc::bind (sigc::ptr_fun (relay_key_press), &tools_tearoff->tearoff_window()), false);
 
        if (Profile->get_sae()) {
                tools_tearoff->set_can_be_torn_off (false);
        }
 
-       tools_tearoff->Detach.connect (bind (mem_fun(*this, &Editor::detach_tearoff), static_cast<Box*>(&toolbar_hbox), 
+       tools_tearoff->Detach.connect (sigc::bind (sigc::mem_fun(*this, &Editor::detach_tearoff), static_cast<Box*>(&toolbar_hbox),
                                             &tools_tearoff->tearoff_window()));
-       tools_tearoff->Attach.connect (bind (mem_fun(*this, &Editor::reattach_tearoff), static_cast<Box*> (&toolbar_hbox), 
+       tools_tearoff->Attach.connect (sigc::bind (sigc::mem_fun(*this, &Editor::reattach_tearoff), static_cast<Box*> (&toolbar_hbox),
                                             &tools_tearoff->tearoff_window(), 0));
-       tools_tearoff->Hidden.connect (bind (mem_fun(*this, &Editor::detach_tearoff), static_cast<Box*>(&toolbar_hbox), 
+       tools_tearoff->Hidden.connect (sigc::bind (sigc::mem_fun(*this, &Editor::detach_tearoff), static_cast<Box*>(&toolbar_hbox),
                                             &tools_tearoff->tearoff_window()));
-       tools_tearoff->Visible.connect (bind (mem_fun(*this, &Editor::reattach_tearoff), static_cast<Box*> (&toolbar_hbox), 
+       tools_tearoff->Visible.connect (sigc::bind (sigc::mem_fun(*this, &Editor::reattach_tearoff), static_cast<Box*> (&toolbar_hbox),
                                              &tools_tearoff->tearoff_window(), 0));
 
        toolbar_hbox.set_spacing (10);
@@ -3232,13 +2948,12 @@ Editor::setup_toolbar ()
        toolbar_hbox.pack_start (*mouse_mode_tearoff, false, false);
        toolbar_hbox.pack_start (*tools_tearoff, false, false);
 
-       
        hbox->pack_start (snap_box, false, false);
-       // hbox->pack_start (zoom_box, false, false); 
        hbox->pack_start (*nudge_box, false, false);
+       hbox->pack_start (panic_box, false, false);
 
        hbox->show_all ();
-       
+
        toolbar_base.set_name ("ToolBarBase");
        toolbar_base.add (toolbar_hbox);
 
@@ -3248,133 +2963,48 @@ Editor::setup_toolbar ()
 }
 
 void
-Editor::midi_panic_button_pressed ()
+Editor::midi_panic ()
 {
-       if (session) {
-               session->midi_panic();
+       cerr << "MIDI panic\n";
+
+       if (_session) {
+               _session->midi_panic();
        }
 }
 
 void
 Editor::setup_midi_toolbar ()
 {
-       string pixmap_path;
-
-       /* Mode Buttons (tool selection) */
-
-       vector<ToggleButton *> midi_tool_buttons;
-
-       midi_tool_pencil_button.add (*(manage (new Image (::get_icon("midi_tool_pencil")))));
-       midi_tool_pencil_button.set_relief(Gtk::RELIEF_NONE);
-       midi_tool_buttons.push_back (&midi_tool_pencil_button);
-       midi_tool_select_button.add (*(manage (new Image (::get_icon("midi_tool_select")))));
-       midi_tool_select_button.set_relief(Gtk::RELIEF_NONE);
-       midi_tool_buttons.push_back (&midi_tool_select_button);
-       midi_tool_resize_button.add (*(manage (new Image (::get_icon("strip_width")))));
-       midi_tool_resize_button.set_relief(Gtk::RELIEF_NONE);
-       midi_tool_buttons.push_back (&midi_tool_resize_button);
-       midi_tool_erase_button.add (*(manage (new Image (::get_icon("midi_tool_erase")))));
-       midi_tool_erase_button.set_relief(Gtk::RELIEF_NONE);
-       midi_tool_buttons.push_back (&midi_tool_erase_button);
-
-       midi_tool_pencil_button.set_active(true);
-       
-       midi_tool_button_set = new GroupedButtons (midi_tool_buttons);
-
-       midi_tool_button_box.set_border_width (2);
-       midi_tool_button_box.set_spacing(1);
-       midi_tool_button_box.pack_start(midi_tool_pencil_button, true, true);
-       midi_tool_button_box.pack_start(midi_tool_select_button, true, true);
-       midi_tool_button_box.pack_start(midi_tool_resize_button, true, true);
-       midi_tool_button_box.pack_start(midi_tool_erase_button , true, true);
-       midi_tool_button_box.set_homogeneous(true);
-
-       midi_tool_pencil_button.set_name ("MouseModeButton");
-       midi_tool_select_button.set_name ("MouseModeButton");
-       midi_tool_resize_button.set_name ("MouseModeButton");
-       midi_tool_erase_button .set_name ("MouseModeButton");
-
-       ARDOUR_UI::instance()->tooltips().set_tip (midi_tool_pencil_button, _("Add/Move/Stretch Notes"));
-       ARDOUR_UI::instance()->tooltips().set_tip (midi_tool_select_button, _("Select/Move Notes"));
-       ARDOUR_UI::instance()->tooltips().set_tip (midi_tool_resize_button, _("Resize Notes"));
-       ARDOUR_UI::instance()->tooltips().set_tip (midi_tool_erase_button,  _("Erase Notes"));
-
-       midi_tool_pencil_button.unset_flags (CAN_FOCUS);
-       midi_tool_select_button.unset_flags (CAN_FOCUS);
-       midi_tool_resize_button.unset_flags (CAN_FOCUS);
-       midi_tool_erase_button.unset_flags (CAN_FOCUS);
-       
-       midi_tool_pencil_button.signal_toggled().connect (bind (mem_fun(*this,
-                               &Editor::midi_edit_mode_toggled), Editing::MidiEditPencil));
-       midi_tool_select_button.signal_toggled().connect (bind (mem_fun(*this,
-                               &Editor::midi_edit_mode_toggled), Editing::MidiEditSelect));
-       midi_tool_resize_button.signal_toggled().connect (bind (mem_fun(*this,
-                               &Editor::midi_edit_mode_toggled), Editing::MidiEditResize));
-       midi_tool_erase_button.signal_toggled().connect (bind (mem_fun(*this,
-                               &Editor::midi_edit_mode_toggled), Editing::MidiEditErase));
+       RefPtr<Action> act;
 
-       
        /* Midi sound notes */
        midi_sound_notes.add (*(manage (new Image (::get_icon("midi_sound_notes")))));
        midi_sound_notes.set_relief(Gtk::RELIEF_NONE);
        ARDOUR_UI::instance()->tooltips().set_tip (midi_sound_notes, _("Sound Notes"));
        midi_sound_notes.unset_flags (CAN_FOCUS);
-       
-       /* Panic */
-       
-       HBox* panic_box = manage (new HBox);
-       midi_panic_button.set_name("MidiPanicButton");
-       midi_panic_button.signal_pressed().connect (
-                       mem_fun(this, &Editor::midi_panic_button_pressed));
-       panic_box->pack_start (midi_sound_notes , true, true);
-       panic_box->pack_start (midi_panic_button, true, true);
-       
-       /* Pack everything in... */
-
-       midi_tools_tearoff = manage (new TearOff (midi_tool_button_box));
-       midi_tools_tearoff->set_name ("MouseModeBase");
-
-       /*
-       midi_tools_tearoff->Detach.connect (bind (mem_fun(*this, &Editor::detach_tearoff), static_cast<Box*>(&midi_toolbar_hbox), 
-                                            &midi_tools_tearoff->tearoff_window()));
-       midi_tools_tearoff->Attach.connect (bind (mem_fun(*this, &Editor::reattach_tearoff), static_cast<Box*> (&midi_toolbar_hbox), 
-                                            &midi_tools_tearoff->tearoff_window(), 0));
-       midi_tools_tearoff->Hidden.connect (bind (mem_fun(*this, &Editor::detach_tearoff), static_cast<Box*>(&midi_toolbar_hbox), 
-                                            &midi_tools_tearoff->tearoff_window()));
-       midi_tools_tearoff->Visible.connect (bind (mem_fun(*this, &Editor::reattach_tearoff), static_cast<Box*> (&midi_toolbar_hbox), 
-                                             &midi_tools_tearoff->tearoff_window(), 0));
-       */
 
-       midi_toolbar_hbox.set_spacing (10);
-       midi_toolbar_hbox.set_border_width (1);
-
-       midi_toolbar_hbox.pack_start (*midi_tools_tearoff, false, true);
-       
-       midi_toolbar_hbox.pack_start(*panic_box, false, true, 4);
+       /* Panic */
 
-       midi_tool_button_box.show_all ();
-       midi_toolbar_hbox.show_all();
-       midi_tools_tearoff->show_all();
-       
-       midi_toolbar_base.set_name ("ToolBarBase");
-       midi_toolbar_base.add (midi_toolbar_hbox);
+       act = ActionManager::get_action (X_("MIDI"), X_("panic"));
+       midi_panic_button.set_name("MidiPanicButton");
+       ARDOUR_UI::instance()->tooltips().set_tip (midi_panic_button, _("Send note off and reset controller messages on all MIDI channels"));
+       act->connect_proxy (midi_panic_button);
 
-       midi_toolbar_frame.set_shadow_type (SHADOW_OUT);
-       midi_toolbar_frame.set_name ("BaseFrame");
-       midi_toolbar_frame.add (midi_toolbar_base);
+       panic_box.pack_start (midi_sound_notes , true, true);
+       panic_box.pack_start (midi_panic_button, true, true);
 }
 
 int
-Editor::convert_drop_to_paths (vector<ustring>& paths, 
-                              const RefPtr<Gdk::DragContext>& context,
-                              gint                x,
-                              gint                y,
-                              const SelectionData& data,
-                              guint               info,
-                              guint               time)                               
-
-{      
-       if (session == 0) {
+Editor::convert_drop_to_paths (
+               vector<ustring>&                paths,
+               const RefPtr<Gdk::DragContext>& /*context*/,
+               gint                            /*x*/,
+               gint                            /*y*/,
+               const SelectionData&            data,
+               guint                           /*info*/,
+               guint                           /*time*/)
+{
+       if (_session == 0) {
                return -1;
        }
 
@@ -3389,8 +3019,8 @@ Editor::convert_drop_to_paths (vector<ustring>& paths,
                if (data.get_target() != "text/plain") {
                        return -1;
                }
-  
-               /* Parse the "uri-list" format that Nautilus provides, 
+
+               /* Parse the "uri-list" format that Nautilus provides,
                   where each pathname is delimited by \r\n.
 
                   THERE MAY BE NO NULL TERMINATING CHAR!!!
@@ -3410,18 +3040,18 @@ Editor::convert_drop_to_paths (vector<ustring>& paths,
                        {
                                while (g_ascii_isspace (*p))
                                        p++;
-                               
+
                                q = p;
                                while (*q && (*q != '\n') && (*q != '\r')) {
                                        q++;
                                }
-                               
+
                                if (q > p)
                                {
                                        q--;
                                        while (q > p && g_ascii_isspace (*q))
                                                q--;
-                                       
+
                                        if (q > p)
                                        {
                                                uris.push_back (ustring (p, q - p + 1));
@@ -3434,21 +3064,21 @@ Editor::convert_drop_to_paths (vector<ustring>& paths,
                }
 
                free ((void*)p);
-               
+
                if (uris.empty()) {
                        return -1;
                }
        }
-       
+
        for (vector<ustring>::iterator i = uris.begin(); i != uris.end(); ++i) {
 
                if ((*i).substr (0,7) == "file://") {
-                       
+
                        ustring p = *i;
-                        PBD::url_decode (p);
+                       PBD::url_decode (p);
 
                        // scan forward past three slashes
-                       
+
                        ustring::size_type slashcnt = 0;
                        ustring::size_type n = 0;
                        ustring::iterator x = p.begin();
@@ -3484,9 +3114,9 @@ Editor::new_tempo_section ()
 void
 Editor::map_transport_state ()
 {
-       ENSURE_GUI_THREAD (mem_fun(*this, &Editor::map_transport_state));
+       ENSURE_GUI_THREAD (*this, &Editor::map_transport_state)
 
-       if (session->transport_stopped()) {
+       if (_session->transport_stopped()) {
                have_pending_keyboard_selection = false;
        }
 
@@ -3506,85 +3136,65 @@ Editor::State::~State ()
 }
 
 void
-Editor::store_state (State& state) const
+Editor::begin_reversible_command (string name)
 {
-       *state.selection = *selection;
+       if (_session) {
+               before = &get_state();
+               _session->begin_reversible_command (name);
+       }
 }
 
 void
-Editor::restore_state (State *state)
+Editor::commit_reversible_command ()
 {
-       if (*selection == *state->selection) {
-               return;
+       if (_session) {
+               _session->commit_reversible_command (new MementoCommand<Editor>(*this, before, &get_state()));
        }
-
-       *selection = *state->selection;
-       time_selection_changed ();
-       region_selection_changed ();
-
-       /* XXX other selection change handlers? */
-}
-
-void
-Editor::begin_reversible_command (string name)
-{
-       if (session) {
-                before = &get_state();
-               session->begin_reversible_command (name);
-       }
-}
-
-void
-Editor::commit_reversible_command ()
-{
-       if (session) {
-               session->commit_reversible_command (new MementoCommand<Editor>(*this, before, &get_state()));
-       }
-}
+}
 
 void
-Editor::set_edit_group_solo (Route& route, bool yn)
+Editor::set_route_group_solo (Route& route, bool yn)
 {
-       RouteGroup *edit_group;
+       RouteGroup *route_group;
 
-       if ((edit_group = route.edit_group()) != 0) {
-               edit_group->apply (&Route::set_solo, yn, this);
+       if ((route_group = route.route_group()) != 0) {
+               route_group->apply (&Route::set_solo, yn, this);
        } else {
                route.set_solo (yn, this);
        }
 }
 
 void
-Editor::set_edit_group_mute (Route& route, bool yn)
+Editor::set_route_group_mute (Route& route, bool yn)
 {
-       RouteGroup *edit_group = 0;
+       RouteGroup *route_group = 0;
 
-       if ((edit_group == route.edit_group()) != 0) {
-               edit_group->apply (&Route::set_mute, yn, this);
+       if ((route_group == route.route_group()) != 0) {
+               route_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) {
+       if (undo_action && _session) {
+               if (_session->undo_depth() == 0) {
                        label = _("Undo");
                } else {
-                       label = string_compose(_("Undo (%1)"), session->next_undo());
+                       label = string_compose(_("Undo (%1)"), _session->next_undo());
                }
                undo_action->property_label() = label;
        }
 
-       if (redo_action && session) {
-               if (session->redo_depth() == 0) {
+       if (redo_action && _session) {
+               if (_session->redo_depth() == 0) {
                        label = _("Redo");
                } else {
-                       label = string_compose(_("Redo (%1)"), session->next_redo());
+                       label = string_compose(_("Redo (%1)"), _session->next_redo());
                }
                redo_action->property_label() = label;
        }
@@ -3603,7 +3213,7 @@ Editor::duplicate_dialog (bool with_dialog)
 
        RegionSelection rs;
        get_regions_for_action (rs);
-       
+
        if (mouse_mode != MouseRange) {
 
                if (rs.empty()) {
@@ -3613,44 +3223,44 @@ Editor::duplicate_dialog (bool with_dialog)
 
        if (with_dialog) {
 
-               ArdourDialog win ("Duplication Dialog");
+               ArdourDialog win ("Duplicate");
                Label  label (_("Number of Duplications:"));
                Adjustment adjustment (1.0, 1.0, 1000000.0, 1.0, 5.0);
                SpinButton spinner (adjustment, 0.0, 1);
                HBox hbox;
-               
+
                win.get_vbox()->set_spacing (12);
                win.get_vbox()->pack_start (hbox);
                hbox.set_border_width (6);
                hbox.pack_start (label, PACK_EXPAND_PADDING, 12);
-               
+
                /* dialogs have ::add_action_widget() but that puts the spinner in the wrong
                   place, visually. so do this by hand.
                */
-               
+
                hbox.pack_start (spinner, PACK_EXPAND_PADDING, 12);
-               spinner.signal_activate().connect (sigc::bind (mem_fun (win, &ArdourDialog::response), RESPONSE_ACCEPT));
+               spinner.signal_activate().connect (sigc::bind (sigc::mem_fun (win, &ArdourDialog::response), RESPONSE_ACCEPT));
                spinner.grab_focus();
 
                hbox.show ();
                label.show ();
                spinner.show ();
-               
+
                win.add_button (Stock::CANCEL, RESPONSE_CANCEL);
                win.add_button (_("Duplicate"), RESPONSE_ACCEPT);
                win.set_default_response (RESPONSE_ACCEPT);
-               
+
                win.set_position (WIN_POS_MOUSE);
-               
+
                spinner.grab_focus ();
-               
+
                switch (win.run ()) {
                case RESPONSE_ACCEPT:
                        break;
                default:
                        return;
                }
-               
+
                times = adjustment.get_value();
        }
 
@@ -3682,7 +3292,7 @@ Editor::clamp_verbose_cursor_x (double x)
        if (x < 0) {
                x = 0;
        } else {
-               x = min (canvas_width - 200.0, x);
+               x = min (_canvas_width - 200.0, x);
        }
        return x;
 }
@@ -3693,11 +3303,29 @@ Editor::clamp_verbose_cursor_y (double y)
        if (y < canvas_timebars_vsize) {
                y = canvas_timebars_vsize;
        } else {
-               y = min (canvas_height - 50, y);
+               y = min (_canvas_height - 50, y);
        }
        return y;
 }
 
+void
+Editor::show_verbose_canvas_cursor_with (const string & txt)
+{
+       verbose_canvas_cursor->property_text() = txt.c_str();
+
+       int x, y;
+       double wx, wy;
+
+       track_canvas->get_pointer (x, y);
+       track_canvas->window_to_world (x, y, wx, wy);
+
+       /* don't get too close to the edge */
+       verbose_canvas_cursor->property_x() = clamp_verbose_cursor_x (wx);
+       verbose_canvas_cursor->property_y() = clamp_verbose_cursor_y (wy);
+
+       show_verbose_canvas_cursor ();
+}
+
 void
 Editor::set_verbose_canvas_cursor (const string & txt, double x, double y)
 {
@@ -3742,7 +3370,7 @@ Editor::cycle_edit_mode ()
 void
 Editor::edit_mode_selection_done ()
 {
-       if (session == 0) {
+       if (_session == 0) {
                return;
        }
 
@@ -3758,7 +3386,7 @@ Editor::edit_mode_selection_done ()
        }
 
        Config->set_edit_mode (mode);
-}      
+}
 
 void
 Editor::snap_type_selection_done ()
@@ -3792,12 +3420,12 @@ Editor::snap_type_selection_done ()
                snaptype = SnapToRegionSync;
        } else if (choice == _("CD Frames")) {
                snaptype = SnapToCDFrame;
-       } else if (choice == _("SMPTE Frames")) {
-               snaptype = SnapToSMPTEFrame;
-       } else if (choice == _("SMPTE Seconds")) {
-               snaptype = SnapToSMPTESeconds;
-       } else if (choice == _("SMPTE Minutes")) {
-               snaptype = SnapToSMPTEMinutes;
+       } else if (choice == _("Timecode Frames")) {
+               snaptype = SnapToTimecodeFrame;
+       } else if (choice == _("Timecode Seconds")) {
+               snaptype = SnapToTimecodeSeconds;
+       } else if (choice == _("Timecode Minutes")) {
+               snaptype = SnapToTimecodeMinutes;
        } else if (choice == _("Seconds")) {
                snaptype = SnapToSeconds;
        } else if (choice == _("Minutes")) {
@@ -3808,7 +3436,7 @@ Editor::snap_type_selection_done ()
        if (ract) {
                ract->set_active ();
        }
-}      
+}
 
 void
 Editor::snap_mode_selection_done ()
@@ -3884,24 +3512,20 @@ Editor::zoom_focus_selection_done ()
                focus_type = ZoomFocusRight;
        } else if (choice == _("Center")) {
                focus_type = ZoomFocusCenter;
-       } else if (choice == _("Play")) {
+       } else if (choice == _("Playhead")) {
                focus_type = ZoomFocusPlayhead;
-       } else if (choice == _("Edit")) {
-               focus_type = ZoomFocusEdit;
-       } else if (choice == _("Active Mark")) {
-               focus_type = ZoomFocusEdit;
-       } else if (choice == _("Active Mark")) {
-               focus_type = ZoomFocusEdit;
-       } else {
+       } else if (choice == _("Mouse")) {
                focus_type = ZoomFocusMouse;
-       } 
-       
+       } else if (choice == _("Edit point")) {
+               focus_type = ZoomFocusEdit;
+       }
+
        RefPtr<RadioAction> ract = zoom_focus_action (focus_type);
 
        if (ract) {
                ract->set_active ();
        }
-}      
+}
 
 gint
 Editor::edit_controls_button_release (GdkEventButton* ev)
@@ -3924,44 +3548,6 @@ Editor::mouse_select_button_release (GdkEventButton* ev)
        return true;
 }
 
-Editor::TrackViewList *
-Editor::get_valid_views (TimeAxisView* track, RouteGroup* group)
-{
-       TrackViewList *v;
-       TrackViewList::iterator i;
-
-       v = new TrackViewList;
-
-       if (track == 0 && group == 0) {
-
-               /* all views */
-
-               for (i = track_views.begin(); i != track_views.end (); ++i) {
-                       v->push_back (*i);
-               }
-
-       } else if ((track != 0 && group == 0) || (track != 0 && group != 0 && !group->is_active())) {
-               
-               /* just the view for this track
-                */
-
-               v->push_back (track);
-
-       } else {
-               
-               /* views for all tracks in the edit group */
-               
-               for (i  = track_views.begin(); i != track_views.end (); ++i) {
-
-                       if (group == 0 || (*i)->edit_group() == group) {
-                               v->push_back (*i);
-                       }
-               }
-       }
-       
-       return v;
-}
-
 void
 Editor::set_zoom_focus (ZoomFocus f)
 {
@@ -3970,7 +3556,7 @@ Editor::set_zoom_focus (ZoomFocus f)
        if (str != zoom_focus_selector.get_active_text()) {
                zoom_focus_selector.set_active_text (str);
        }
-       
+
        if (zoom_focus != f) {
                zoom_focus = f;
 
@@ -3986,7 +3572,7 @@ Editor::ensure_float (Window& win)
        win.set_transient_for (*this);
 }
 
-void 
+void
 Editor::pane_allocation_handler (Allocation &alloc, Paned* which)
 {
        /* recover or initialize pane positions. do this here rather than earlier because
@@ -4042,17 +3628,20 @@ Editor::pane_allocation_handler (Allocation &alloc, Paned* which)
 }
 
 void
-Editor::detach_tearoff (Box* b, Window* w)
+Editor::detach_tearoff (Box* /*b*/, Window* /*w*/)
 {
-       if (tools_tearoff->torn_off() && 
+       cerr << "remove tearoff\n";
+
+       if (tools_tearoff->torn_off() &&
            mouse_mode_tearoff->torn_off()) {
                top_hbox.remove (toolbar_frame);
        }
 }
 
 void
-Editor::reattach_tearoff (Box* b, Window* w, int32_t n)
+Editor::reattach_tearoff (Box* /*b*/, Window* /*w*/, int32_t /*n*/)
 {
+       cerr << "reattach tearoff\n";
        if (toolbar_frame.get_parent() == 0) {
                top_hbox.pack_end (toolbar_frame);
        }
@@ -4122,17 +3711,17 @@ Editor::edit_xfade (boost::weak_ptr<Crossfade> wxfade)
                return;
        }
 
-       CrossfadeEditor cew (*session, xfade, xfade->fade_in().get_min_y(), 1.0);
-               
+       CrossfadeEditor cew (_session, xfade, xfade->fade_in().get_min_y(), 1.0);
+
        ensure_float (cew);
-       
+
        switch (cew.run ()) {
        case RESPONSE_ACCEPT:
                break;
        default:
                return;
        }
-       
+
        cew.apply ();
        xfade->StateChanged (Change (~0));
 }
@@ -4143,6 +3732,60 @@ Editor::playlist_selector () const
        return *_playlist_selector;
 }
 
+Evoral::MusicalTime
+Editor::get_grid_type_as_beats (bool& success, nframes64_t position)
+{
+       success = true;
+
+       switch (_snap_type) {
+       case SnapToBeat:
+               return 1.0;
+               break;
+
+       case SnapToAThirtysecondBeat:
+               return 1.0/32.0;
+               break;
+
+       case SnapToASixteenthBeat:
+               return 1.0/16.0;
+               break;
+
+       case SnapToAEighthBeat:
+               return 1.0/8.0;
+               break;
+
+       case SnapToAQuarterBeat:
+               return 1.0/4.0;
+               break;
+
+       case SnapToAThirdBeat:
+               return 1.0/3.0;
+               break;
+
+       case SnapToBar:
+               if (_session) {
+                       return _session->tempo_map().meter_at (position).beats_per_bar();
+               }
+               break;
+
+       case SnapToCDFrame:
+       case SnapToTimecodeFrame:
+       case SnapToTimecodeSeconds:
+       case SnapToTimecodeMinutes:
+       case SnapToSeconds:
+       case SnapToMinutes:
+       case SnapToRegionStart:
+       case SnapToRegionEnd:
+       case SnapToRegionSync:
+       case SnapToRegionBoundary:
+       default:
+               success = false;
+               break;
+       }
+
+       return 0.0;
+}
+
 nframes64_t
 Editor::get_nudge_distance (nframes64_t pos, nframes64_t& next)
 {
@@ -4157,7 +3800,7 @@ Editor::get_nudge_distance (nframes64_t pos, nframes64_t& next)
 void
 Editor::end_location_changed (Location* location)
 {
-       ENSURE_GUI_THREAD (bind (mem_fun(*this, &Editor::end_location_changed), location));
+       ENSURE_GUI_THREAD (*this, &Editor::end_location_changed, location)
        //reset_scrolling_region ();
        nframes64_t session_span = location->start() + (nframes64_t) floorf (current_page_frames() * 0.10f);
        horizontal_adjustment.set_upper (session_span / frames_per_unit);
@@ -4171,7 +3814,7 @@ Editor::playlist_deletion_dialog (boost::shared_ptr<Playlist> pl)
                                        "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);
 
@@ -4220,21 +3863,20 @@ Editor::prepare_for_cleanup ()
        selection->clear_regions ();
        selection->clear_playlists ();
 
-       no_region_list_redisplay = true;
+       _regions->suspend_redisplay ();
 }
 
 void
 Editor::finish_cleanup ()
 {
-       no_region_list_redisplay = false;
-       redisplay_regions ();
+       _regions->resume_redisplay ();
 }
 
 Location*
 Editor::transport_loop_location()
 {
-       if (session) {
-               return session->locations()->auto_loop_location();
+       if (_session) {
+               return _session->locations()->auto_loop_location();
        } else {
                return 0;
        }
@@ -4243,8 +3885,8 @@ Editor::transport_loop_location()
 Location*
 Editor::transport_punch_location()
 {
-       if (session) {
-               return session->locations()->auto_punch_location();
+       if (_session) {
+               return _session->locations()->auto_punch_location();
        } else {
                return 0;
        }
@@ -4253,6 +3895,10 @@ Editor::transport_punch_location()
 bool
 Editor::control_layout_scroll (GdkEventScroll* ev)
 {
+       if (Keyboard::some_magic_widget_has_focus()) {
+               return false;
+       }
+
        switch (ev->direction) {
        case GDK_SCROLL_UP:
                scroll_tracks_up_line ();
@@ -4262,7 +3908,7 @@ Editor::control_layout_scroll (GdkEventScroll* ev)
        case GDK_SCROLL_DOWN:
                scroll_tracks_down_line ();
                return true;
-               
+
        default:
                /* no left/right handling yet */
                break;
@@ -4271,161 +3917,12 @@ Editor::control_layout_scroll (GdkEventScroll* ev)
        return false;
 }
 
-
-/** A new snapshot has been selected.
- */
-void
-Editor::snapshot_display_selection_changed ()
-{
-       if (snapshot_display.get_selection()->count_selected_rows() > 0) {
-
-               TreeModel::iterator i = snapshot_display.get_selection()->get_selected();
-               
-               Glib::ustring snap_name = (*i)[snapshot_display_columns.real_name];
-
-               if (snap_name.length() == 0) {
-                       return;
-               }
-               
-               if (session->snap_name() == snap_name) {
-                       return;
-               }
-               
-               ARDOUR_UI::instance()->load_session(session->path(), string (snap_name));
-       }
-}
-
-bool
-Editor::snapshot_display_button_press (GdkEventButton* ev)
-{
-       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
-Editor::redisplay_snapshots ()
-{
-       if (session == 0) {
-               return;
-       }
-
-       vector<sys::path> state_file_paths;
-
-       get_state_files_in_directory (session->session_directory().root_path(),
-                       state_file_paths);
-
-       if (state_file_paths.empty()) return;
-
-       vector<string> state_file_names(get_file_names_no_extension(state_file_paths));
-
-       snapshot_display_model->clear ();
-
-       for (vector<string>::iterator i = state_file_names.begin();
-                       i != state_file_names.end(); ++i)
-       {
-               string statename = (*i);
-               TreeModel::Row row = *(snapshot_display_model->append());
-               
-               /* 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()) {
-                       snapshot_display.get_selection()->select(row);
-               } 
-               
-               row[snapshot_display_columns.visible_name] = display_name;
-               row[snapshot_display_columns.real_name] = statename;
-       }
-}
-
 void
 Editor::session_state_saved (string snap_name)
 {
-       ENSURE_GUI_THREAD (bind (mem_fun(*this, &Editor::session_state_saved), snap_name));
-       redisplay_snapshots ();
+       ENSURE_GUI_THREAD (*this, &Editor::session_state_saved, snap_name)
+
+       _snapshots->redisplay ();
 }
 
 void
@@ -4444,7 +3941,7 @@ Editor::maximise_editing_space ()
        fullscreen();
 
        if(post_maximal_editor_width) {
-               edit_pane.set_position (post_maximal_pane_position - 
+               edit_pane.set_position (post_maximal_pane_position -
                        abs(post_maximal_editor_width - pre_maximal_editor_width));
        } else {
                edit_pane.set_position (post_maximal_pane_position);
@@ -4471,23 +3968,23 @@ Editor::restore_editing_space ()
 
 /**
  *  Make new playlists for a given track and also any others that belong
- *  to the same active edit group.
+ *  to the same active route group with the `edit' property.
  *  @param v Track.
  */
 
-void 
+void
 Editor::new_playlists (TimeAxisView* v)
 {
        begin_reversible_command (_("new playlists"));
        vector<boost::shared_ptr<ARDOUR::Playlist> > playlists;
-       session->get_playlists(playlists);
-       mapover_tracks ( bind(mem_fun (*this, &Editor::mapped_use_new_playlist), playlists), v );
+       _session->playlists->get (playlists);
+       mapover_tracks (sigc::bind (sigc::mem_fun (*this, &Editor::mapped_use_new_playlist), playlists), v, RouteGroup::Edit);
        commit_reversible_command ();
 }
 
 /**
  *  Use a copy of the current playlist for a given track and also any others that belong
- *  to the same active edit group.
+ *  to the same active route group with the `edit' property.
  *  @param v Track.
  */
 
@@ -4496,28 +3993,27 @@ Editor::copy_playlists (TimeAxisView* v)
 {
        begin_reversible_command (_("copy playlists"));
        vector<boost::shared_ptr<ARDOUR::Playlist> > playlists;
-       session->get_playlists(playlists);
-       mapover_tracks ( bind(mem_fun (*this, &Editor::mapped_use_copy_playlist), playlists), v );
+       _session->playlists->get (playlists);
+       mapover_tracks (sigc::bind (sigc::mem_fun (*this, &Editor::mapped_use_copy_playlist), playlists), v, RouteGroup::Edit);
        commit_reversible_command ();
 }
 
-/**
- *  Clear the current playlist for a given track and also any others that belong
- *  to the same active edit group.
+/** Clear the current playlist for a given track and also any others that belong
+ *  to the same active route group with the `edit' property.
  *  @param v Track.
  */
 
-void 
+void
 Editor::clear_playlists (TimeAxisView* v)
 {
        begin_reversible_command (_("clear playlists"));
        vector<boost::shared_ptr<ARDOUR::Playlist> > playlists;
-       session->get_playlists(playlists);
-       mapover_tracks ( mem_fun (*this, &Editor::mapped_clear_playlist), v );
+       _session->playlists->get (playlists);
+       mapover_tracks (sigc::mem_fun (*this, &Editor::mapped_clear_playlist), v, RouteGroup::Edit);
        commit_reversible_command ();
 }
 
-void 
+void
 Editor::mapped_use_new_playlist (RouteTimeAxisView& atv, uint32_t sz, vector<boost::shared_ptr<ARDOUR::Playlist> > const & playlists)
 {
        atv.use_new_playlist (sz > 1 ? false : true, playlists);
@@ -4529,8 +4025,8 @@ Editor::mapped_use_copy_playlist (RouteTimeAxisView& atv, uint32_t sz, vector<bo
        atv.use_copy_playlist (sz > 1 ? false : true, playlists);
 }
 
-void 
-Editor::mapped_clear_playlist (RouteTimeAxisView& atv, uint32_t sz)
+void
+Editor::mapped_clear_playlist (RouteTimeAxisView& atv, uint32_t /*sz*/)
 {
        atv.clear_playlist ();
 }
@@ -4555,6 +4051,12 @@ Editor::reset_x_origin (nframes64_t frame)
        queue_visual_change (frame);
 }
 
+void
+Editor::reset_y_origin (double y)
+{
+       queue_visual_change_y (y);
+}
+
 void
 Editor::reset_zoom (double fpu)
 {
@@ -4581,14 +4083,13 @@ Editor::current_visual_state (bool with_tracks)
        vs->frames_per_unit = frames_per_unit;
        vs->leftmost_frame = leftmost_frame;
        vs->zoom_focus = zoom_focus;
-       vs->zoomed_to_region = zoomed_to_region;
 
        if (with_tracks) {
                for (TrackViewList::iterator i = track_views.begin(); i != track_views.end(); ++i) {
                        vs->track_states.push_back (TAVState ((*i), &(*i)->get_state()));
                }
        }
-       
+
        return vs;
 }
 
@@ -4632,31 +4133,30 @@ void
 Editor::use_visual_state (VisualState& vs)
 {
        no_save_visual = true;
-       no_route_list_redisplay = true;
+
+       _routes->suspend_redisplay ();
 
        vertical_adjustment.set_value (vs.y_position);
 
        set_zoom_focus (vs.zoom_focus);
        reposition_and_zoom (vs.leftmost_frame, vs.frames_per_unit);
-       zoomed_to_region = vs.zoomed_to_region;
-       
+
        for (list<TAVState>::iterator i = vs.track_states.begin(); i != vs.track_states.end(); ++i) {
                TrackViewList::iterator t;
 
                /* check if the track still exists - it could have been deleted */
 
                if ((t = find (track_views.begin(), track_views.end(), i->first)) != track_views.end()) {
-                       (*t)->set_state (*(i->second));
+                       (*t)->set_state (*(i->second), Stateful::loading_state_version);
                }
        }
 
 
        if (!vs.track_states.empty()) {
-               update_route_visibility ();
-       } 
+               _routes->update_visibility ();
+       }
 
-       no_route_list_redisplay = false;
-       redisplay_route_list ();
+       _routes->resume_redisplay ();
 
        no_save_visual = false;
 }
@@ -4676,7 +4176,7 @@ Editor::set_frames_per_unit (double fpu)
                fpu = 2.0;
        }
 
-       
+
        /* don't allow zooms that fit more than the maximum number
           of frames into an 800 pixel wide space.
        */
@@ -4684,7 +4184,7 @@ Editor::set_frames_per_unit (double fpu)
        if (max_frames / fpu < 800.0) {
                return;
        }
-       
+
        if (tempo_lines)
                tempo_lines->tempo_map_changed();
 
@@ -4699,31 +4199,24 @@ Editor::post_zoom ()
 
        // convert fpu to frame count
 
-       nframes64_t frames = (nframes64_t) floor (frames_per_unit * canvas_width);
+       nframes64_t frames = (nframes64_t) floor (frames_per_unit * _canvas_width);
 
        if (frames_per_unit != 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);
-                       }
+               for (TrackViewList::iterator i = selection->tracks.begin(); i != selection->tracks.end(); ++i) {
+                       (*i)->reshow_selection (selection->time);
                }
        }
 
+       leftmost_frame = (nframes64_t) floor (horizontal_adjustment.get_value() * frames_per_unit);
 
        ZoomChanged (); /* EMIT_SIGNAL */
 
-       reset_hscrollbar_stepping ();
-
-       if (session) {
-               cef = session->current_end_frame() + (current_page_frames() / 10);// Add a little extra so we can see the end marker
+       if (_session) {
+               cef = _session->current_end_frame() + (current_page_frames() / 10);// Add a little extra so we can see the end marker
        }
        horizontal_adjustment.set_upper (cef / frames_per_unit);
 
@@ -4733,39 +4226,54 @@ Editor::post_zoom ()
                playhead_cursor->set_position (playhead_cursor->current_frame);
        }
 
+       refresh_location_display();
+       _summary->set_overlays_dirty ();
+
        instant_save ();
 }
 
 void
 Editor::queue_visual_change (nframes64_t where)
 {
-       pending_visual_change.pending = VisualChange::Type (pending_visual_change.pending | VisualChange::TimeOrigin);
-       
+       pending_visual_change.add (VisualChange::TimeOrigin);
+
        /* if we're moving beyond the end, make sure the upper limit of the horizontal adjustment
           can reach.
        */
-       
-       if (where > session->current_end_frame()) {
+
+       if (_session && (where > _session->current_end_frame())) {
                horizontal_adjustment.set_upper ((where + current_page_frames()) / frames_per_unit);
        }
-       
+
        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);
-       }
+
+       ensure_visual_change_idle_handler ();
 }
 
 void
 Editor::queue_visual_change (double fpu)
 {
-       pending_visual_change.pending = VisualChange::Type (pending_visual_change.pending | VisualChange::ZoomLevel);
+       pending_visual_change.add (VisualChange::ZoomLevel);
        pending_visual_change.frames_per_unit = fpu;
 
+       ensure_visual_change_idle_handler ();
+}
+
+void
+Editor::queue_visual_change_y (double y)
+{
+       pending_visual_change.add (VisualChange::YOrigin);
+       pending_visual_change.y_origin = y;
+
+       ensure_visual_change_idle_handler ();
+}
+
+void
+Editor::ensure_visual_change_idle_handler ()
+{
        if (pending_visual_change.idle_handler_id < 0) {
-               pending_visual_change.idle_handler_id = g_idle_add ( _idle_visual_changer, this);
+               pending_visual_change.idle_handler_id = g_idle_add (_idle_visual_changer, this);
        }
-       
 }
 
 int
@@ -4780,9 +4288,7 @@ Editor::idle_visual_changer ()
        VisualChange::Type p = pending_visual_change.pending;
        pending_visual_change.pending = (VisualChange::Type) 0;
 
-#ifdef FIX_THIS_FOR_V3
        double last_time_origin = horizontal_adjustment.get_value();
-#endif
 
        if (p & VisualChange::ZoomLevel) {
                set_frames_per_unit (pending_visual_change.frames_per_unit);
@@ -4795,25 +4301,27 @@ Editor::idle_visual_changer ()
        if (p & VisualChange::TimeOrigin) {
                horizontal_adjustment.set_value (pending_visual_change.time_origin / frames_per_unit);
        }
+       if (p & VisualChange::YOrigin) {
+               vertical_adjustment.set_value (pending_visual_change.y_origin);
+       }
 
        nframes64_t csf=0, cef=0;
        nframes64_t current_time_origin = (nframes64_t) floor (horizontal_adjustment.get_value() * frames_per_unit);
-       
-       if (session) {
-               csf = session->current_start_frame();
-               cef = session->current_end_frame();
+
+       if (_session) {
+               csf = _session->current_start_frame();
+               cef = _session->current_end_frame();
        }
-       
+
        /* if we seek beyond the current end of the canvas, move the end */
 
-#ifdef FIX_THIS_FOR_V3
+
        if (last_time_origin == horizontal_adjustment.get_value() ) {
                /* changed signal not emitted */
                update_fixed_rulers ();
                redisplay_tempo (true);
        }
-#endif
-       
+
        if (current_time_origin != pending_visual_change.time_origin) {
                cef += current_page_frames() / 10; // Add a little extra so we can see the end marker
                horizontal_adjustment.set_upper (cef / frames_per_unit);
@@ -4822,7 +4330,10 @@ Editor::idle_visual_changer ()
                update_fixed_rulers();
                redisplay_tempo (true);
        }
-       //cerr << "Editor::idle_visual_changer () called ha v:l:u:ps:fpu = " << horizontal_adjustment.get_value() << ":" << horizontal_adjustment.get_lower() << ":" << horizontal_adjustment.get_upper() << ":" << horizontal_adjustment.get_page_size() << ":" << frames_per_unit << endl;//DEBUG
+
+       _summary->set_overlays_dirty ();
+
+       // cerr << "Editor::idle_visual_changer () called ha v:l:u:ps:fpu = " << horizontal_adjustment.get_value() << ":" << horizontal_adjustment.get_lower() << ":" << horizontal_adjustment.get_upper() << ":" << horizontal_adjustment.get_page_size() << ":" << frames_per_unit << endl;//DEBUG
        pending_visual_change.idle_handler_id = -1;
        return 0; /* this is always a one-shot call */
 }
@@ -4832,9 +4343,9 @@ struct EditorOrderTimeAxisSorter {
            return a->order () < b->order ();
     }
 };
-       
+
 void
-Editor::sort_track_selection (TrackSelection* sel)
+Editor::sort_track_selection (TrackViewList* sel)
 {
        EditorOrderTimeAxisSorter cmp;
 
@@ -4862,9 +4373,9 @@ Editor::get_preferred_edit_position (bool ignore_playhead)
 
        switch (ep) {
        case EditAtPlayhead:
-               where = session->audible_frame();
+               where = _session->audible_frame();
                break;
-               
+
        case EditAtSelectedMarker:
                if (!selection->markers.empty()) {
                        bool is_start;
@@ -4877,9 +4388,9 @@ Editor::get_preferred_edit_position (bool ignore_playhead)
                                }
                                break;
                        }
-               } 
+               }
                /* fallthru */
-               
+
        default:
        case EditAtMouse:
                if (!mouse_frame (where, ignored)) {
@@ -4896,62 +4407,67 @@ Editor::get_preferred_edit_position (bool ignore_playhead)
 void
 Editor::set_loop_range (nframes64_t start, nframes64_t end, string cmd)
 {
-       if (!session) return;
+       if (!_session) return;
 
        begin_reversible_command (cmd);
-       
+
        Location* tll;
 
        if ((tll = transport_loop_location()) == 0) {
                Location* loc = new Location (start, end, _("Loop"),  Location::IsAutoLoop);
-                XMLNode &before = session->locations()->get_state();
-               session->locations()->add (loc, true);
-               session->set_auto_loop_location (loc);
-                XMLNode &after = session->locations()->get_state();
-               session->add_command (new MementoCommand<Locations>(*(session->locations()), &before, &after));
+               XMLNode &before = _session->locations()->get_state();
+               _session->locations()->add (loc, true);
+               _session->set_auto_loop_location (loc);
+               XMLNode &after = _session->locations()->get_state();
+               _session->add_command (new MementoCommand<Locations>(*(_session->locations()), &before, &after));
        } else {
-                XMLNode &before = tll->get_state();
+               XMLNode &before = tll->get_state();
                tll->set_hidden (false, this);
                tll->set (start, end);
-                XMLNode &after = tll->get_state();
-                session->add_command (new MementoCommand<Location>(*tll, &before, &after));
+               XMLNode &after = tll->get_state();
+               _session->add_command (new MementoCommand<Location>(*tll, &before, &after));
        }
-       
+
        commit_reversible_command ();
 }
 
 void
 Editor::set_punch_range (nframes64_t start, nframes64_t end, string cmd)
 {
-       if (!session) return;
+       if (!_session) return;
 
        begin_reversible_command (cmd);
-       
+
        Location* tpl;
 
        if ((tpl = transport_punch_location()) == 0) {
                Location* loc = new Location (start, end, _("Loop"),  Location::IsAutoPunch);
-                XMLNode &before = session->locations()->get_state();
-               session->locations()->add (loc, true);
-               session->set_auto_loop_location (loc);
-                XMLNode &after = session->locations()->get_state();
-               session->add_command (new MementoCommand<Locations>(*(session->locations()), &before, &after));
+               XMLNode &before = _session->locations()->get_state();
+               _session->locations()->add (loc, true);
+               _session->set_auto_loop_location (loc);
+               XMLNode &after = _session->locations()->get_state();
+               _session->add_command (new MementoCommand<Locations>(*(_session->locations()), &before, &after));
        }
        else {
-                XMLNode &before = tpl->get_state();
+               XMLNode &before = tpl->get_state();
                tpl->set_hidden (false, this);
                tpl->set (start, end);
-                XMLNode &after = tpl->get_state();
-                session->add_command (new MementoCommand<Location>(*tpl, &before, &after));
+               XMLNode &after = tpl->get_state();
+               _session->add_command (new MementoCommand<Location>(*tpl, &before, &after));
        }
-       
+
        commit_reversible_command ();
 }
 
+/** Find regions which exist at a given time, and optionally on a given list of tracks.
+ *  @param rs List to which found regions are added.
+ *  @param where Time to look at.
+ *  @param ts Tracks to look on; if this is empty, all tracks are examined.
+ */
 void
-Editor::get_regions_at (RegionSelection& rs, nframes64_t where, const TrackSelection& ts) const
+Editor::get_regions_at (RegionSelection& rs, nframes64_t where, const TrackViewList& ts) const
 {
-       const TrackSelection* tracks;
+       const TrackViewList* tracks;
 
        if (ts.empty()) {
                tracks = &track_views;
@@ -4959,12 +4475,12 @@ Editor::get_regions_at (RegionSelection& rs, nframes64_t where, const TrackSelec
                tracks = &ts;
        }
 
-       for (TrackSelection::const_iterator t = tracks->begin(); t != tracks->end(); ++t) {
+       for (TrackViewList::const_iterator t = tracks->begin(); t != tracks->end(); ++t) {
                RouteTimeAxisView* rtv = dynamic_cast<RouteTimeAxisView*>(*t);
                if (rtv) {
                        boost::shared_ptr<Diskstream> ds;
                        boost::shared_ptr<Playlist> pl;
-                       
+
                        if ((ds = rtv->get_diskstream()) && ((pl = ds->playlist()))) {
 
                                Playlist::RegionList* regions = pl->regions_at (
@@ -4984,9 +4500,9 @@ Editor::get_regions_at (RegionSelection& rs, nframes64_t where, const TrackSelec
 }
 
 void
-Editor::get_regions_after (RegionSelection& rs, nframes64_t where, const TrackSelection& ts) const
+Editor::get_regions_after (RegionSelection& rs, nframes64_t where, const TrackViewList& ts) const
 {
-       const TrackSelection* tracks;
+       const TrackViewList* tracks;
 
        if (ts.empty()) {
                tracks = &track_views;
@@ -4994,12 +4510,12 @@ Editor::get_regions_after (RegionSelection& rs, nframes64_t where, const TrackSe
                tracks = &ts;
        }
 
-       for (TrackSelection::const_iterator t = tracks->begin(); t != tracks->end(); ++t) {
+       for (TrackViewList::const_iterator t = tracks->begin(); t != tracks->end(); ++t) {
                RouteTimeAxisView* rtv = dynamic_cast<RouteTimeAxisView*>(*t);
                if (rtv) {
                        boost::shared_ptr<Diskstream> ds;
                        boost::shared_ptr<Playlist> pl;
-                       
+
                        if ((ds = rtv->get_diskstream()) && ((pl = ds->playlist()))) {
 
                                Playlist::RegionList* regions = pl->regions_touched (
@@ -5020,97 +4536,81 @@ Editor::get_regions_after (RegionSelection& rs, nframes64_t where, const TrackSe
        }
 }
 
+/** Find all regions which are either:
+ *      - selected or
+ *      - the entered_regionview (if allow_entered == true) or
+ *      - under the preferred edit position AND on a selected track, or on a track
+ *        which is in the same active edit-enable route group as a selected region (if allow_edit_position == true)
+ *  @param rs Returned region list.
+ *  @param allow_entered true to include the entered_regionview in the list.
+ */
 void
-Editor::get_regions_for_action (RegionSelection& rs, bool allow_entered)
+Editor::get_regions_for_action (RegionSelection& rs, bool allow_entered, bool allow_edit_position)
 {
-       if (selection->regions.empty()) {
-
-               if (selection->tracks.empty()) {
-
-                       /* no regions or tracks selected
-                       */
-                       
-                       if (entered_regionview && mouse_mode == Editing::MouseObject) {
-
-                               /*  entered regionview is valid and we're in object mode - 
-                                   just use entered regionview
-                               */
+       /* Start with selected regions */
+       rs = selection->regions;
 
-                               rs.add (entered_regionview);
-                       }
-
-                       return;
-
-               } else {
+       /* Add the entered_regionview, if requested */
+       if (allow_entered && entered_regionview) {
+               rs.add (entered_regionview);
+       }
 
-                       /* no regions selected, so get all regions at the edit point across
-                          all selected tracks. 
-                       */
+       if (allow_edit_position) {
 
-                       nframes64_t where = get_preferred_edit_position();
-                       get_regions_at (rs, where, selection->tracks);
+               TrackViewList tracks = selection->tracks;
 
-                       /* if the entered regionview wasn't selected and neither was its track
-                          then add it.
-                       */
+               /* tracks is currently the set of selected tracks; add any other tracks that
+                * have regions that are in the same edit-activated route group as one of
+                * our regions */
+               for (RegionSelection::iterator i = rs.begin (); i != rs.end(); ++i) {
 
-                       if (entered_regionview != 0 &&
-                           !selection->selected (entered_regionview) && 
-                           !selection->selected (&entered_regionview->get_time_axis_view())) {
-                               rs.add (entered_regionview);
-                       }
+                       RouteGroup* g = (*i)->get_time_axis_view().route_group ();
+                       if (g && g->active_property (RouteGroup::Edit)) {
+                               tracks.add (axis_views_from_routes (g->route_list()));
+                       }
+                       
                }
 
-       } else {
-               
-               /* just use the selected regions */
-
-               rs = selection->regions;
-
-               /* if the entered regionview wasn't selected and we allow this sort of thing,
-                  then add it.
-               */
-
-               if (allow_entered && entered_regionview && !selection->selected (entered_regionview)) {
-                       rs.add (entered_regionview);
+               if (!tracks.empty()) {
+                       /* now find regions that are at the edit position on those tracks */
+                       nframes64_t const where = get_preferred_edit_position ();
+                       get_regions_at (rs, where, tracks);
                }
-
        }
 }
 
 void
 Editor::get_regions_corresponding_to (boost::shared_ptr<Region> region, vector<RegionView*>& regions)
 {
-
        for (TrackViewList::iterator i = track_views.begin(); i != track_views.end(); ++i) {
-               
+
                RouteTimeAxisView* tatv;
-               
+
                if ((tatv = dynamic_cast<RouteTimeAxisView*> (*i)) != 0) {
-                       
+
                        boost::shared_ptr<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 = (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) {
                                        regions.push_back (marv);
                                }
                        }
-                       
+
                }
        }
-}      
+}
 
 void
 Editor::show_rhythm_ferret ()
@@ -5119,26 +4619,16 @@ Editor::show_rhythm_ferret ()
                rhythm_ferret = new RhythmFerret(*this);
        }
 
-       rhythm_ferret->set_session (session);
+       rhythm_ferret->set_session (_session);
        rhythm_ferret->show ();
        rhythm_ferret->present ();
 }
 
-void
-Editor::show_bundle_manager ()
-{
-       if (_bundle_manager == 0) {
-               _bundle_manager = new BundleManager (*session);
-       }
-
-       _bundle_manager->show ();
-}
-
 void
 Editor::show_global_port_matrix (ARDOUR::DataType t)
 {
        if (_global_port_matrix[t] == 0) {
-               _global_port_matrix[t] = new GlobalPortMatrixWindow (*session, t);
+               _global_port_matrix[t] = new GlobalPortMatrixWindow (_session, t);
        }
 
        _global_port_matrix[t]->show ();
@@ -5149,8 +4639,8 @@ Editor::first_idle ()
 {
        MessageDialog* dialog = 0;
 
-       if (track_views.size() > 1) { 
-               dialog = new MessageDialog (*this, 
+       if (track_views.size() > 1) {
+               dialog = new MessageDialog (*this,
                                            _("Please wait while Ardour loads visual data"),
                                            true,
                                            Gtk::MESSAGE_INFO,
@@ -5164,187 +4654,360 @@ Editor::first_idle ()
        }
 
        // first idle adds route children (automation tracks), so we need to redisplay here
-       redisplay_route_list();
-       
+       _routes->redisplay ();
+
        delete dialog;
 
        _have_idled = true;
 }
 
+static gboolean
+_idle_resizer (gpointer arg)
+{
+       return ((Editor*)arg)->idle_resize ();
+}
+
 void
-Editor::start_resize_line_ops ()
+Editor::add_to_idle_resize (TimeAxisView* view, int32_t h)
 {
-#if 0
-       old_resize_line_y = -1;
-       resize_line_y = -1;
-       need_resize_line = true;
-#endif 
+       if (resize_idle_id < 0) {
+               resize_idle_id = g_idle_add (_idle_resizer, this);
+               _pending_resize_amount = 0;
+       }
+
+       /* make a note of the smallest resulting height, so that we can clamp the
+          lower limit at TimeAxisView::hSmall */
+
+       int32_t min_resulting = INT32_MAX;
+
+       _pending_resize_amount += h;
+       _pending_resize_view = view;
+
+       min_resulting = min (min_resulting, int32_t (_pending_resize_view->current_height()) + _pending_resize_amount);
+
+       if (selection->tracks.contains (_pending_resize_view)) {
+               for (TrackViewList::iterator i = selection->tracks.begin(); i != selection->tracks.end(); ++i) {
+                       min_resulting = min (min_resulting, int32_t ((*i)->current_height()) + _pending_resize_amount);
+               }
+       }
+
+       if (min_resulting < 0) {
+               min_resulting = 0;
+       }
+
+       /* clamp */
+       if (uint32_t (min_resulting) < TimeAxisView::hSmall) {
+               _pending_resize_amount += TimeAxisView::hSmall - min_resulting;
+       }
+}
+
+/** Handle pending resizing of tracks */
+bool
+Editor::idle_resize ()
+{
+       _pending_resize_view->idle_resize (_pending_resize_view->current_height() + _pending_resize_amount);
+
+       if (dynamic_cast<AutomationTimeAxisView*> (_pending_resize_view) == 0 &&
+           selection->tracks.contains (_pending_resize_view)) {
+
+               for (TrackViewList::iterator i = selection->tracks.begin(); i != selection->tracks.end(); ++i) {
+                       if (*i != _pending_resize_view) {
+                               (*i)->idle_resize ((*i)->current_height() + _pending_resize_amount);
+                       }
+               }
+       }
+
+       flush_canvas ();
+       _group_tabs->set_dirty ();
+       resize_idle_id = -1;
+
+       return false;
 }
 
 void
-Editor::end_resize_line_ops ()
+Editor::located ()
 {
-#if 0
-       need_resize_line = false;
+       ENSURE_GUI_THREAD (*this, &Editor::located)
 
-       if (old_resize_line_y >= 0) {
-               Gdk::Rectangle r (0, old_resize_line_y, (int) canvas_width, 3);
-               Glib::RefPtr<Gdk::Window> win = get_window();
-               cerr << "Final invalidation at " << old_resize_line_y << endl;
-               win->invalidate_rect (r, false);
+       _pending_locate_request = false;
+}
+
+void
+Editor::region_view_added (RegionView *)
+{
+       _summary->set_dirty ();
+}
+
+void
+Editor::streamview_height_changed ()
+{
+       _summary->set_dirty ();
+}
+
+TimeAxisView*
+Editor::axis_view_from_route (boost::shared_ptr<Route> r) const
+{
+       TrackViewList::const_iterator j = track_views.begin ();
+       while (j != track_views.end()) {
+               RouteTimeAxisView* rtv = dynamic_cast<RouteTimeAxisView*> (*j);
+               if (rtv && rtv->route() == r) {
+                       return rtv;
+               }
+               ++j;
        }
-#endif
+
+       return 0;
+}
+
+
+TrackViewList
+Editor::axis_views_from_routes (boost::shared_ptr<RouteList> r) const
+{
+       TrackViewList t;
+
+       for (RouteList::const_iterator i = r->begin(); i != r->end(); ++i) {
+               TimeAxisView* tv = axis_view_from_route (*i);
+               if (tv) {
+                       t.push_back (tv);
+               }
+       }
+
+       return t;
 }
 
+
 void
-Editor::queue_draw_resize_line (int at)
+Editor::handle_new_route (RouteList& routes)
 {
-#if 0  
-       Glib::RefPtr<Gdk::Window> win = get_window();
+       ENSURE_GUI_THREAD (*this, &Editor::handle_new_route, routes)
 
-       resize_line_y = at;
+       RouteTimeAxisView *rtv;
+       list<RouteTimeAxisView*> new_views;
 
-       if (win && canvas_width) {
+       for (RouteList::iterator x = routes.begin(); x != routes.end(); ++x) {
+               boost::shared_ptr<Route> route = (*x);
 
-               int controls_width = controls_layout.get_width();
-               int xroot, discard;
-               
-               controls_layout.get_window()->get_origin (xroot, discard);
+               if (route->is_hidden()) {
+                       continue;
+               }
 
-               if (old_resize_line_y >= 0) {
-                       
-                       /* redraw where it used to be */
-                       
-                       
-                       Gdk::Rectangle r (0, old_resize_line_y - 1, controls_width + (int) canvas_width, 3);
-                       win->invalidate_rect (r, true);
-                       cerr << "invalidate " << xroot << "," << old_resize_line_y - 1 << ' ' 
-                            << controls_width + canvas_width << " x 3\n";
+               DataType dt = route->input()->default_type();
+
+               if (dt == ARDOUR::DataType::AUDIO) {
+                       rtv = new AudioTimeAxisView (*this, _session, route, *track_canvas);
+               } else if (dt == ARDOUR::DataType::MIDI) {
+                       rtv = new MidiTimeAxisView (*this, _session, route, *track_canvas);
+               } else {
+                       throw unknown_type();
                }
 
-               /* draw where it is */
+               new_views.push_back (rtv);
+               track_views.push_back (rtv);
+
+               rtv->effective_gain_display ();
 
-               Gdk::Rectangle r (0, at - 1, controls_width + (int) canvas_width, 3);
-               win->invalidate_rect (r, true);
+               rtv->view()->RegionViewAdded.connect (sigc::mem_fun (*this, &Editor::region_view_added));
+               rtv->view()->HeightChanged.connect (sigc::mem_fun (*this, &Editor::streamview_height_changed));
+
+               rtv->GoingAway.connect (*this, boost::bind (&Editor::remove_route, this, rtv));
        }
-#endif
+
+       _routes->routes_added (new_views);
+
+       if (show_editor_mixer_when_tracks_arrive) {
+               show_editor_mixer (true);
+       }
+
+       editor_list_button.set_sensitive (true);
+
+       _summary->set_dirty ();
 }
 
-bool
-Editor::on_expose_event (GdkEventExpose* ev)
-{
-       /* cerr << "+++ editor expose "
-            << ev->area.x << ',' << ev->area.y
-            << ' '
-            << ev->area.width << " x " << ev->area.height
-            << " need reize ? " << need_resize_line
-            << endl;
-       */
-       bool ret = Window::on_expose_event (ev);
+void
+Editor::remove_route (TimeAxisView *tv)
+{
+       ENSURE_GUI_THREAD (*this, &Editor::remove_route, tv)
+
+       TrackViewList::iterator i;
 
-#if 0
-       if (need_resize_line) {
+       boost::shared_ptr<Route> route;
+       RouteTimeAxisView* rtav = dynamic_cast<RouteTimeAxisView*> (tv);
+       if (rtav) {
+               route = rtav->route ();
+       }
                
-               int xroot, yroot, discard;
-               int controls_width;
+       TimeAxisView* next_tv = 0;
 
-               /* Our root coordinates for drawing the line will be the left edge 
-                  of the track controls, and the upper left edge of our own window.
-               */
+       if (tv == entered_track) {
+               entered_track = 0;
+       }
 
-               get_window()->get_origin (discard, yroot);
-               controls_layout.get_window()->get_origin (xroot, discard);
-               controls_width = controls_layout.get_width();
-               
-               GdkRectangle lr;
-               GdkRectangle intersection;
+       if ((i = find (track_views.begin(), track_views.end(), tv)) != track_views.end()) {
 
-               lr.x = 0;
-               lr.y = resize_line_y;
-               lr.width = controls_width + (int) canvas_width;
-               lr.height = 3;
+               i = track_views.erase (i);
 
-               if (gdk_rectangle_intersect (&lr, &ev->area, &intersection)) {
-                       
-                       Glib::RefPtr<Gtk::Style> style (get_style());
-                       Glib::RefPtr<Gdk::GC> black_gc (style->get_black_gc ());
-                       Glib::RefPtr<Gdk::GC> gc = wrap (black_gc->gobj_copy(), false);
+               if (track_views.empty()) {
+                       next_tv = 0;
+               } else if (i == track_views.end()) {
+                       next_tv = track_views.front();
+               } else {
+                      next_tv = (*i);
+               }
+       }
 
-                       /* draw on root window */
+       if (current_mixer_strip && current_mixer_strip->route() == route) {
 
-                       GdkWindow* win = gdk_get_default_root_window();
-                       
-                       gc->set_subwindow (Gdk::INCLUDE_INFERIORS);
-                       gc->set_line_attributes (3, Gdk::LINE_SOLID, 
-                                                Gdk::CAP_NOT_LAST,
-                                                Gdk::JOIN_MITER);
-                       
-                       gdk_draw_line (win, gc->gobj(), 
-                                      0,
-                                      resize_line_y, 
-                                      (int) canvas_width + controls_width,
-                                      resize_line_y);
-#if 0
-                       cerr << "drew line @ " << xroot << ", " << yroot + resize_line_y 
-                            << " to " << xroot + (int) canvas_width + controls_width
-                            << ", " << yroot + resize_line_y
-                            << endl;
-#endif
-                       old_resize_line_y = resize_line_y;
-                       cerr << "NEXT EXPOSE SHOULD BE AT " << old_resize_line_y << endl;
-               } else {
-                       cerr << "no intersect with "
-                            << lr.x << ',' << lr.y
-                            << ' '
-                            << lr.width << " x " << lr.height
-                            << endl;
-               }
+               if (next_tv) {
+                       set_selected_mixer_strip (*next_tv);
+               } else {
+                       /* make the editor mixer strip go away setting the
+                        * button to inactive (which also unticks the menu option)
+                        */
+
+                       ActionManager::uncheck_toggleaction ("<Actions>/Editor/show-editor-mixer");
+               }
        }
+}
 
-       //cerr << "--- editor expose\n";
-#endif
+void
+Editor::hide_track_in_display (TimeAxisView& tv, bool /*temponly*/)
+{
+       RouteTimeAxisView* rtv = dynamic_cast<RouteTimeAxisView*> (&tv);
 
-       return ret;
+       if (rtv && current_mixer_strip && (rtv->route() == current_mixer_strip->route())) {
+               // this will hide the mixer strip
+               set_selected_mixer_strip (tv);
+       }
+
+       _routes->hide_track_in_display (tv);
 }
 
-static gboolean
-_idle_resizer (gpointer arg)
+bool
+Editor::sync_track_view_list_and_routes ()
 {
-       return ((Editor*)arg)->idle_resize ();
+       track_views = TrackViewList (_routes->views ());
+
+       _summary->set_dirty ();
+       _group_tabs->set_dirty ();
+
+       return false; // do not call again (until needed)
 }
 
 void
-Editor::add_to_idle_resize (TimeAxisView* view, uint32_t h)
+Editor::foreach_time_axis_view (sigc::slot<void,TimeAxisView&> theslot)
 {
-       if (resize_idle_id < 0) {
-               resize_idle_id = g_idle_add (_idle_resizer, this);
-       } 
+       for (TrackViewList::iterator i = track_views.begin(); i != track_views.end(); ++i) {
+               theslot (**i);
+       }
+}
+
+RouteTimeAxisView*
+Editor::get_route_view_by_id (PBD::ID& id)
+{
+       RouteTimeAxisView* v;
+
+       for(TrackViewList::iterator i = track_views.begin(); i != track_views.end(); ++i) {
+               if((v = dynamic_cast<RouteTimeAxisView*>(*i)) != 0) {
+                       if(v->route()->id() == id) {
+                               return v;
+                       }
+               }
+       }
 
-       resize_idle_target = h;
+       return 0;
+}
+
+void
+Editor::fit_route_group (RouteGroup *g)
+{
+       TrackViewList ts = axis_views_from_routes (g->route_list ());
+       fit_tracks (ts);
+}
+
+void
+Editor::consider_auditioning (boost::shared_ptr<Region> region)
+{
+       boost::shared_ptr<AudioRegion> r = boost::dynamic_pointer_cast<AudioRegion> (region);
 
-       pending_resizes.push_back (view);
+       if (r == 0) {
+               _session->cancel_audition ();
+               return;
+       }
 
-       if (selection->selected (view) && !selection->tracks.empty()) {
-               pending_resizes.insert (pending_resizes.end(), selection->tracks.begin(), selection->tracks.end());
+       if (_session->is_auditioning()) {
+               _session->cancel_audition ();
+               if (r == last_audition_region) {
+                       return;
+               }
        }
+
+       _session->audition_region (r);
+       last_audition_region = r;
+}
+
+
+void
+Editor::hide_a_region (boost::shared_ptr<Region> r)
+{
+       r->set_hidden (true);
+}
+
+void
+Editor::remove_a_region (boost::shared_ptr<Region> r)
+{
+       _session->remove_region_from_region_list (r);
+}
+
+void
+Editor::audition_region_from_region_list ()
+{
+       _regions->selection_mapover (sigc::mem_fun (*this, &Editor::consider_auditioning));
+}
+
+void
+Editor::hide_region_from_region_list ()
+{
+       _regions->selection_mapover (sigc::mem_fun (*this, &Editor::hide_a_region));
+}
+
+void
+Editor::start_step_editing ()
+{
+       step_edit_connection = Glib::signal_timeout().connect (sigc::mem_fun (*this, &Editor::check_step_edit), 20);
+}
+
+void
+Editor::stop_step_editing ()
+{
+       step_edit_connection.disconnect ();
 }
 
 bool
-Editor::idle_resize ()
+Editor::check_step_edit ()
 {
-       for (vector<TimeAxisView*>::iterator i = pending_resizes.begin(); i != pending_resizes.end(); ++i) {
-               (*i)->idle_resize (resize_idle_target);
+       for (TrackViewList::iterator i = track_views.begin(); i != track_views.end(); ++i) {
+               MidiTimeAxisView* mtv = dynamic_cast<MidiTimeAxisView*> (*i);
+               if (mtv) {
+                       mtv->check_step_edit ();
+               }
        }
-       pending_resizes.clear();
-       flush_canvas ();
-       resize_idle_id = -1;
-       return false;
+
+       return true; // do it again, till we stop
 }
 
 void
-Editor::located ()
+Editor::horizontal_scroll_left ()
 {
-       ENSURE_GUI_THREAD (mem_fun (*this, &Editor::located));
+       double x = leftmost_position() - current_page_frames() / 5;
+       if (x < 0) {
+               x = 0;
+       }
+       
+       reset_x_origin (x);
+}
 
-       _pending_locate_request = false;
+void
+Editor::horizontal_scroll_right ()
+{
+       reset_x_origin (leftmost_position() + current_page_frames() / 5);
 }