add transition_to_{roll,reverse}
[ardour.git] / gtk2_ardour / editor.cc
index 64729740931babca7709b404ac0399a447faa526..fec951f9d20987bc403d7a67d46ca856286b2468 100644 (file)
@@ -28,6 +28,7 @@
 
 #include <pbd/convert.h>
 #include <pbd/error.h>
+#include <pbd/stacktrace.h>
 #include <pbd/memento_command.h>
 
 #include <gtkmm/image.h>
 #include "keyboard.h"
 #include "marker.h"
 #include "playlist_selector.h"
-#include "regionview.h"
+#include "audio_region_view.h"
 #include "rgb_macros.h"
 #include "selection.h"
-#include "streamview.h"
+#include "audio_streamview.h"
 #include "time_axis_view.h"
+#include "audio_time_axis.h"
 #include "utils.h"
 #include "crossfade_view.h"
 #include "editing.h"
@@ -91,23 +93,13 @@ using namespace Glib;
 using namespace Gtkmm2ext;
 using namespace Editing;
 
-using PBD::internationalize;
 using PBD::atoi;
 
 const double Editor::timebar_height = 15.0;
 
 #include "editor_xpms"
 
-static const int32_t slide_index = 0;
-static const int32_t splice_index = 1;
-
-static const gchar *edit_mode_strings[] = {
-       N_("Slide"),
-       N_("Splice"),
-       0
-};
-
-static const gchar *snap_type_strings[] = {
+static const gchar *_snap_type_strings[] = {
        N_("None"),
        N_("CD Frames"),
        N_("SMPTE Frames"),
@@ -131,18 +123,18 @@ static const gchar *snap_type_strings[] = {
        0
 };
 
-static const gchar *snap_mode_strings[] = {
+static const gchar *_snap_mode_strings[] = {
        N_("Normal"),
        N_("Magnetic"),
        0
 };
 
-static const gchar *zoom_focus_strings[] = {
+static const gchar *_zoom_focus_strings[] = {
        N_("Left"),
        N_("Right"),
        N_("Center"),
        N_("Playhead"),
-       N_("Edit Cursor"),
+       N_("Edit Cursor"),
        0
 };
 
@@ -186,7 +178,7 @@ Editor::Editor (AudioEngine& eng)
 
          minsec_label (_("Mins:Secs")),
          bbt_label (_("Bars:Beats")),
-         smpte_label (_("SMPTE")),
+         smpte_label (_("Timecode")),
          frame_label (_("Frames")),
          tempo_label (_("Tempo")),
          meter_label (_("Meter")),
@@ -205,38 +197,21 @@ Editor::Editor (AudioEngine& eng)
 
          /* tool bar related */
 
-         selection_start_clock (X_("SelectionStartClock"), true),
-         selection_end_clock (X_("SelectionEndClock"), true),
-         edit_cursor_clock (X_("EditCursorClock"), true),
-         zoom_range_clock (X_("ZoomRangeClock"), true, true),
+         edit_cursor_clock (X_("editcursor"), false, X_("EditCursorClock"), true),
+         zoom_range_clock (X_("zoomrange"), false, X_("ZoomRangeClock"), true, true),
          
          toolbar_selection_clock_table (2,3),
          
-         mouse_mode_button_table (2, 3),
-
-         mouse_select_button (_("range")),
-         mouse_move_button (_("object")),
-         mouse_gain_button (_("gain")),
-         mouse_zoom_button (_("zoom")),
-         mouse_timefx_button (_("timefx")),
-         mouse_audition_button (_("listen")),
-
          automation_mode_button (_("mode")),
          global_automation_button (_("automation")),
 
-         edit_mode_label (_("Edit Mode")),
-         snap_type_label (_("Snap To")),
-         snap_mode_label(_("Snap Mode")),
-         zoom_focus_label (_("Zoom Focus")),
-
          /* <CMT Additions> */
          image_socket_listener(0),
          /* </CMT Additions> */
 
          /* nudge */
 
-         nudge_label (_("Nudge")),
-         nudge_clock (X_("NudgeClock"), true, true)
+         nudge_clock (X_("nudge"), false, X_("NudgeClock"), true, true)
 
 {
        constructed = false;
@@ -263,10 +238,13 @@ Editor::Editor (AudioEngine& eng)
        latest_regionview = 0;
        last_update_frame = 0;
        drag_info.item = 0;
-       last_audition_region = 0;
        current_mixer_strip = 0;
        current_bbt_points = 0;
 
+       snap_type_strings = I18N (_snap_type_strings);
+       snap_mode_strings = I18N (_snap_mode_strings);
+       zoom_focus_strings = I18N(_zoom_focus_strings);
+
        snap_type = SnapToFrame;
        set_snap_to (snap_type);
        snap_mode = SnapNormal;
@@ -275,6 +253,7 @@ Editor::Editor (AudioEngine& eng)
        bbt_beat_subdivision = 4;
        canvas_width = 0;
        canvas_height = 0;
+       autoscroll_active = false;
        autoscroll_timeout_tag = -1;
        interthread_progress_window = 0;
 
@@ -289,7 +268,6 @@ Editor::Editor (AudioEngine& eng)
        first_action_message = 0;
        export_dialog = 0;
        show_gain_after_trim = false;
-       no_zoom_repos_update = false;
        ignore_route_list_reorder = false;
        no_route_list_redisplay = false;
        verbose_cursor_on = true;
@@ -302,18 +280,18 @@ Editor::Editor (AudioEngine& eng)
        _xfade_visibility = true;
        editor_ruler_menu = 0;
        no_ruler_shown_update = false;
-       edit_hscroll_dragging = 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;
        marker_menu_item = 0;
        tm_marker_menu = 0;
        transport_marker_menu = 0;
        new_transport_marker_menu = 0;
        editor_mixer_strip_width = Wide;
-       repos_zoom_queued = false;
+       show_editor_mixer_when_tracks_arrive = false;
        region_edit_menu_split_item = 0;
        temp_location = 0;
        region_edit_menu_split_multichannel_item = 0;
@@ -330,6 +308,8 @@ Editor::Editor (AudioEngine& eng)
        edit_cursor = 0;
        playhead_cursor = 0;
        button_release_can_deselect = true;
+       canvas_idle_queued = false;
+       _dragging_playhead = false;
 
        location_marker_color = color_map[cLocationMarker];
        location_range_color = color_map[cLocationRange];
@@ -342,10 +322,11 @@ Editor::Editor (AudioEngine& eng)
        
        set_mouse_mode (MouseObject, true);
 
-       frames_per_unit = 2048; /* too early to use set_frames_per_unit */
+       frames_per_unit = 2048; /* too early to use reset_zoom () */
        reset_hscrollbar_stepping ();
        
        zoom_focus = ZoomFocusLeft;
+       set_zoom_focus (ZoomFocusLeft);
        zoom_range_clock.ValueChanged.connect (mem_fun(*this, &Editor::zoom_adjustment_changed));
 
        initialize_rulers ();
@@ -378,6 +359,8 @@ Editor::Editor (AudioEngine& eng)
        edit_hscrollbar.signal_button_release_event().connect (mem_fun(*this, &Editor::hscrollbar_button_release));
        edit_hscrollbar.signal_size_allocate().connect (mem_fun(*this, &Editor::hscrollbar_allocate));
 
+       edit_hscrollbar.set_name ("EditorHScrollbar");
+
        build_cursors ();
        setup_toolbar ();
 
@@ -464,43 +447,15 @@ Editor::Editor (AudioEngine& eng)
        edit_packer.attach (controls_layout,         1, 2, 1, 2,    FILL,        FILL|EXPAND, 0, 0);
        edit_packer.attach (track_canvas_event_box,  2, 3, 1, 2,    FILL|EXPAND, FILL|EXPAND, 0, 0);
 
+       edit_packer.attach (zoom_box,                1, 2, 2, 3,    FILL,         FILL, 0, 0);
        edit_packer.attach (edit_hscrollbar,         2, 3, 2, 3,    FILL|EXPAND,  FILL, 0, 0);
 
-       zoom_in_button.set_name ("EditorTimeButton");
-       zoom_out_button.set_name ("EditorTimeButton");
-       ARDOUR_UI::instance()->tooltips().set_tip (zoom_in_button, _("Zoom in"));
-       ARDOUR_UI::instance()->tooltips().set_tip (zoom_out_button, _("Zoom out"));
-
-       zoom_out_full_button.set_name ("EditorTimeButton");
-       ARDOUR_UI::instance()->tooltips().set_tip (zoom_out_full_button, _("Zoom to session"));
-
-       zoom_in_button.add (*(manage (new Image (Stock::ZOOM_IN, ICON_SIZE_BUTTON))));
-       zoom_out_button.add (*(manage (new Image (Stock::ZOOM_OUT, ICON_SIZE_BUTTON))));
-       zoom_out_full_button.add (*(manage (new Image (Stock::ZOOM_FIT, ICON_SIZE_BUTTON))));
-       
-       zoom_in_button.signal_clicked().connect (bind (mem_fun(*this, &Editor::temporal_zoom_step), false));
-       zoom_out_button.signal_clicked().connect (bind (mem_fun(*this, &Editor::temporal_zoom_step), true));
-       zoom_out_full_button.signal_clicked().connect (mem_fun(*this, &Editor::temporal_zoom_session));
-       
-       zoom_indicator_box.pack_start (zoom_out_button, false, false);
-       zoom_indicator_box.pack_start (zoom_in_button, false, false);
-       zoom_indicator_box.pack_start (zoom_range_clock, false, false); 
-       zoom_indicator_box.pack_start (zoom_out_full_button, false, false);
-       
-       zoom_indicator_label.set_text (_("Zoom Span"));
-       zoom_indicator_label.set_name ("ToolBarLabel");
-
-       zoom_indicator_vbox.set_spacing (3);
-       zoom_indicator_vbox.set_border_width (3);
-       zoom_indicator_vbox.pack_start (zoom_indicator_label, false, false);
-       zoom_indicator_vbox.pack_start (zoom_indicator_box, false, false);
-
-       bottom_hbox.set_border_width (3);
+       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 (_("Visible"), route_display_columns.visible);
+       route_list_display.append_column (_("Show"), route_display_columns.visible);
        route_list_display.append_column (_("Name"), route_display_columns.text);
        route_list_display.get_column (0)->set_data (X_("colnum"), GUINT_TO_POINTER(0));
        route_list_display.get_column (1)->set_data (X_("colnum"), GUINT_TO_POINTER(1));
@@ -526,7 +481,7 @@ Editor::Editor (AudioEngine& eng)
        edit_group_display.set_model (group_model);
        edit_group_display.append_column (_("Name"), group_columns.text);
        edit_group_display.append_column (_("Active"), group_columns.is_active);
-       edit_group_display.append_column (_("Visible"), group_columns.is_visible);
+       edit_group_display.append_column (_("Show"), group_columns.is_visible);
        edit_group_display.get_column (0)->set_data (X_("colnum"), GUINT_TO_POINTER(0));
        edit_group_display.get_column (1)->set_data (X_("colnum"), GUINT_TO_POINTER(1));
        edit_group_display.get_column (2)->set_data (X_("colnum"), GUINT_TO_POINTER(2));
@@ -551,12 +506,11 @@ Editor::Editor (AudioEngine& eng)
        active_cell->property_activatable() = true;
        active_cell->property_radio() = false;
 
-       edit_group_display.set_name ("EditGroupList");
-
        group_model->signal_row_changed().connect (mem_fun (*this, &Editor::edit_group_row_change));
 
        edit_group_display.set_name ("EditGroupList");
        edit_group_display.get_selection()->set_mode (SELECTION_SINGLE);
+       edit_group_display.set_headers_visible (false);
        edit_group_display.set_reorderable (false);
        edit_group_display.set_rules_hint (true);
        edit_group_display.set_size_request (75, -1);
@@ -567,7 +521,7 @@ Editor::Editor (AudioEngine& eng)
        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());
-       HButtonBox* edit_group_display_button_box = manage (new HButtonBox());
+       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 ());
@@ -602,7 +556,6 @@ Editor::Editor (AudioEngine& eng)
        region_list_display.set_model (region_list_model);
        region_list_display.append_column (_("Regions"), region_list_columns.name);
        region_list_display.set_headers_visible (false);
-       region_list_display.set_hover_expand (true);
 
        region_list_display.get_selection()->set_select_function (mem_fun (*this, &Editor::region_list_selection_filter));
        
@@ -643,11 +596,12 @@ Editor::Editor (AudioEngine& eng)
        named_selection_display.append_column (_("Chunks"), named_selection_columns.text);
        named_selection_display.set_headers_visible (false);
        named_selection_display.set_size_request (100, -1);
-       named_selection_display.set_name ("RegionListDisplay");
+       named_selection_display.set_name ("NamedSelectionDisplay");
        
        named_selection_display.get_selection()->set_mode (SELECTION_SINGLE);
        named_selection_display.set_size_request (100, -1);
-       named_selection_display.signal_button_press_event().connect (mem_fun(*this, &Editor::named_selection_display_button_press), false);
+       named_selection_display.signal_button_release_event().connect (mem_fun(*this, &Editor::named_selection_display_button_release), false);
+       named_selection_display.signal_key_release_event().connect (mem_fun(*this, &Editor::named_selection_display_key_release), false);
        named_selection_display.get_selection()->signal_changed().connect (mem_fun (*this, &Editor::named_selection_display_selection_changed));
 
        /* SNAPSHOTS */
@@ -655,7 +609,7 @@ Editor::Editor (AudioEngine& eng)
        snapshot_display_model = ListStore::create (snapshot_display_columns);
        snapshot_display.set_model (snapshot_display_model);
        snapshot_display.append_column (X_("snapshot"), snapshot_display_columns.visible_name);
-       snapshot_display.set_name ("SnapshotDisplayList");
+       snapshot_display.set_name ("SnapshotDisplay");
        snapshot_display.set_size_request (75, -1);
        snapshot_display.set_headers_visible (false);
        snapshot_display.set_reorderable (false);
@@ -688,10 +642,12 @@ Editor::Editor (AudioEngine& eng)
        the_notebook.popup_enable ();
        the_notebook.set_tab_pos (Gtk::POS_RIGHT);
 
+       post_maximal_editor_width = 0;
+       post_maximal_pane_position = 0;
        edit_pane.pack1 (edit_packer, true, true);
        edit_pane.pack2 (the_notebook, false, true);
        
-       edit_pane.signal_size_allocate().connect_notify (bind (mem_fun(*this, &Editor::pane_allocation_handler), static_cast<Paned*> (&edit_pane)));
+       edit_pane.signal_size_allocate().connect (bind (mem_fun(*this, &Editor::pane_allocation_handler), static_cast<Paned*> (&edit_pane)));
 
        top_hbox.pack_start (toolbar_frame, true, true);
 
@@ -718,23 +674,44 @@ Editor::Editor (AudioEngine& eng)
        _playlist_selector = new PlaylistSelector();
        _playlist_selector->signal_delete_event().connect (bind (sigc::ptr_fun (just_hide_it), static_cast<Window *> (_playlist_selector)));
 
-       AudioRegionView::AudioRegionViewGoingAway.connect (mem_fun(*this, &Editor::catch_vanishing_audio_regionview));
+       RegionView::RegionViewGoingAway.connect (mem_fun(*this, &Editor::catch_vanishing_regionview));
 
        /* nudge stuff */
 
-       nudge_forward_button.add (*(manage (new Image (get_xpm("right_arrow.xpm")))));
-       nudge_backward_button.add (*(manage (new Image (get_xpm("left_arrow.xpm")))));
+       nudge_forward_button.add (*(manage (new Image (::get_icon("nudge_right")))));
+       nudge_backward_button.add (*(manage (new Image (::get_icon("nudge_left")))));
 
-       ARDOUR_UI::instance()->tooltips().set_tip (nudge_forward_button, _("Nudge region/selection forwards"));
-       ARDOUR_UI::instance()->tooltips().set_tip (nudge_backward_button, _("Nudge region/selection backwards"));
+       ARDOUR_UI::instance()->tooltips().set_tip (nudge_forward_button, _("Nudge Region/Selection Forwards"));
+       ARDOUR_UI::instance()->tooltips().set_tip (nudge_backward_button, _("Nudge Region/Selection Backwards"));
 
        nudge_forward_button.set_name ("TransportButton");
        nudge_backward_button.set_name ("TransportButton");
 
        fade_context_menu.set_name ("ArdourContextMenu");
 
+       /* icons, titles, WM stuff */
+
+       list<Glib::RefPtr<Gdk::Pixbuf> > window_icons;
+       Glib::RefPtr<Gdk::Pixbuf> icon;
+
+       if ((icon = ::get_icon ("ardour_icon_16px")) != 0) {
+               window_icons.push_back (icon);
+       }
+       if ((icon = ::get_icon ("ardour_icon_22px")) != 0) {
+               window_icons.push_back (icon);
+       }
+       if ((icon = ::get_icon ("ardour_icon_32px")) != 0) {
+               window_icons.push_back (icon);
+       }
+       if ((icon = ::get_icon ("ardour_icon_48px")) != 0) {
+               window_icons.push_back (icon);
+       }
+       if (!window_icons.empty()) {
+               set_icon_list (window_icons);
+               set_default_icon_list (window_icons);
+       }
        set_title (_("ardour: editor"));
-       set_wmclass (_("ardour_editor"), "Ardour");
+       set_wmclass (X_("ardour_editor"), "Ardour");
 
        add (vpacker);
        add_events (Gdk::KEY_PRESS_MASK|Gdk::KEY_RELEASE_MASK);
@@ -748,6 +725,9 @@ Editor::Editor (AudioEngine& eng)
        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));
+
+       Config->ParameterChanged.connect (mem_fun (*this, &Editor::parameter_changed));
+
        constructed = true;
        instant_save ();
 }
@@ -776,7 +756,7 @@ Editor::add_toplevel_controls (Container& cont)
 }
 
 void
-Editor::catch_vanishing_audio_regionview (AudioRegionView *rv)
+Editor::catch_vanishing_regionview (RegionView *rv)
 {
        /* note: the selection will take care of the vanishing
           audioregionview by itself.
@@ -792,7 +772,7 @@ Editor::catch_vanishing_audio_regionview (AudioRegionView *rv)
 }
 
 void
-Editor::set_entered_regionview (AudioRegionView* rv)
+Editor::set_entered_regionview (RegionView* rv)
 {
        if (rv == entered_regionview) {
                return;
@@ -846,75 +826,10 @@ Editor::tie_vertical_scrolling ()
        edit_cursor->set_y_axis(y1);
 }
 
-void
-Editor::set_frames_per_unit (double fpu)
-{
-       jack_nframes_t frames;
-
-       if (fpu == frames_per_unit) {
-               return;
-       }
-
-       if (fpu < 1.0) {
-               fpu = 1.0;
-       }
-
-       // convert fpu to frame count
-
-       frames = (jack_nframes_t) floor (fpu * canvas_width);
-       
-       /* don't allow zooms that fit more than the maximum number
-          of frames into an 800 pixel wide space.
-       */
-
-       if (max_frames / fpu < 800.0) {
-               return;
-       }
-
-       frames_per_unit = fpu;
-
-       if (frames != zoom_range_clock.current_duration()) {
-               zoom_range_clock.set (frames);
-       }
-
-       /* only update these if we not about to call reposition_x_origin,
-          which will do the same updates.
-       */
-       
-       if (!no_zoom_repos_update) {
-               horizontal_adjustment.set_value (leftmost_frame/frames_per_unit);
-               update_fixed_rulers ();
-               tempo_map_changed (Change (0));
-       }
-
-       if (mouse_mode == MouseRange && selection->time.start () != selection->time.end_frame ()) {
-               if (!selection->tracks.empty()) {
-                       for (TrackSelection::iterator i = selection->tracks.begin(); i != selection->tracks.end(); ++i) {
-                               (*i)->reshow_selection (selection->time);
-                       }
-               } else {
-                       for (TrackViewList::iterator i = track_views.begin(); i != track_views.end(); ++i) {
-                               (*i)->reshow_selection (selection->time);
-                       }
-               }
-       }
-
-       ZoomChanged (); /* EMIT_SIGNAL */
-
-       reset_hscrollbar_stepping ();
-       reset_scrolling_region ();
-       
-       if (edit_cursor) edit_cursor->set_position (edit_cursor->current_frame);
-       if (playhead_cursor) playhead_cursor->set_position (playhead_cursor->current_frame);
-
-       instant_save ();
-
-}
-
 void
 Editor::instant_save ()
 {
-        if (!constructed || !ARDOUR_UI::instance()->session_loaded) {
+       if (!constructed || !ARDOUR_UI::instance()->session_loaded) {
                return;
        }
 
@@ -925,23 +840,6 @@ Editor::instant_save ()
        }
 }
 
-void
-Editor::reposition_x_origin (jack_nframes_t frame)
-{
-       if (frame != leftmost_frame) {
-               leftmost_frame = frame;
-               
-               jack_nframes_t rightmost_frame = leftmost_frame + current_page_frames ();
-
-               if (rightmost_frame > last_canvas_frame) {
-                       last_canvas_frame = rightmost_frame;
-                       reset_scrolling_region ();
-               }
-
-               horizontal_adjustment.set_value (frame/frames_per_unit);
-       }
-}
-
 void
 Editor::edit_cursor_clock_changed()
 {
@@ -954,7 +852,7 @@ Editor::edit_cursor_clock_changed()
 void
 Editor::zoom_adjustment_changed ()
 {
-       if (session == 0 || no_zoom_repos_update) {
+       if (session == 0) {
                return;
        }
 
@@ -962,10 +860,10 @@ Editor::zoom_adjustment_changed ()
 
        if (fpu < 1.0) {
                fpu = 1.0;
-               zoom_range_clock.set ((jack_nframes_t) floor (fpu * canvas_width));
+               zoom_range_clock.set ((nframes_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 ((jack_nframes_t) floor (fpu * canvas_width));
+               zoom_range_clock.set ((nframes_t) floor (fpu * canvas_width));
        }
        
        temporal_zoom (fpu);
@@ -981,14 +879,14 @@ Editor::control_scroll (float fraction)
        }
 
        double step = fraction * current_page_frames();
-       jack_nframes_t target;
+       nframes_t target;
 
-       if ((fraction < 0.0f) && (session->transport_frame() < (jack_nframes_t) fabs(step))) {
+       if ((fraction < 0.0f) && (session->transport_frame() < (nframes_t) fabs(step))) {
                target = 0;
        } else if ((fraction > 0.0f) && (max_frames - session->transport_frame() < step)) {
                target = (max_frames - (current_page_frames()*2)); // allow room for slop in where the PH is on the screen
        } else {
-               target = (session->transport_frame() + (jack_nframes_t) floor ((fraction * current_page_frames())));
+               target = (session->transport_frame() + (nframes_t) floor ((fraction * current_page_frames())));
        }
 
        /* move visuals, we'll catch up with it later */
@@ -997,9 +895,9 @@ Editor::control_scroll (float fraction)
 
        if (target > (current_page_frames() / 2)) {
                /* try to center PH in window */
-               reposition_x_origin (target - (current_page_frames()/2));
+               reset_x_origin (target - (current_page_frames()/2));
        } else {
-               reposition_x_origin (0);
+               reset_x_origin (0);
        }
 
        /* cancel the existing */
@@ -1012,54 +910,12 @@ Editor::control_scroll (float fraction)
 }
 
 bool
-Editor::deferred_control_scroll (jack_nframes_t target)
+Editor::deferred_control_scroll (nframes_t target)
 {
        session->request_locate (target);
        return false;
 }
 
-void 
-Editor::canvas_horizontally_scrolled ()
-{
-       leftmost_frame = (jack_nframes_t) floor (horizontal_adjustment.get_value() * frames_per_unit);
-
-       update_fixed_rulers ();
-       
-       if (!edit_hscroll_dragging) {
-               tempo_map_changed (Change (0));
-       } else {
-               update_tempo_based_rulers();
-       }
-}
-
-void
-Editor::reposition_and_zoom (jack_nframes_t frame, double nfpu)
-{
-       if (!repos_zoom_queued) {
-               Glib::signal_idle().connect (bind (mem_fun(*this, &Editor::deferred_reposition_and_zoom), frame, nfpu));
-               repos_zoom_queued = true;
-       }
-}
-
-gint
-Editor::deferred_reposition_and_zoom (jack_nframes_t frame, double nfpu)
-{
-       /* if we need to force an update to the hscroller stuff,
-          don't set no_zoom_repos_update.
-       */
-
-       no_zoom_repos_update = (frame != leftmost_frame);
-       
-       set_frames_per_unit (nfpu);
-       if (no_zoom_repos_update) {
-               reposition_x_origin  (frame);
-       }
-       no_zoom_repos_update = false;
-       repos_zoom_queued = false;
-       
-       return FALSE;
-}
-
 void
 Editor::on_realize ()
 {
@@ -1067,35 +923,6 @@ Editor::on_realize ()
        Realized ();
 }
 
-void
-Editor::queue_session_control_changed (Session::ControlType t)
-{
-       Gtkmm2ext::UI::instance()->call_slot (bind (mem_fun(*this, &Editor::session_control_changed), t));
-}
-
-void
-Editor::session_control_changed (Session::ControlType t)
-{
-       // right now we're only tracking some state here 
-
-       switch (t) {
-       case Session::AutoLoop:
-               update_loop_range_view (true);
-               break;
-       case Session::PunchIn:
-       case Session::PunchOut:
-               update_punch_range_view (true);
-               break;
-
-       case Session::LayeringModel:
-               update_layering_model ();
-               break;
-
-       default:
-               break;
-       }
-}
-
 void
 Editor::start_scrolling ()
 {
@@ -1107,11 +934,10 @@ void
 Editor::stop_scrolling ()
 {
        scroll_connection.disconnect ();
-       slower_update_connection.disconnect ();
 }
 
 void
-Editor::map_position_change (jack_nframes_t frame)
+Editor::map_position_change (nframes_t frame)
 {
        ENSURE_GUI_THREAD (bind (mem_fun(*this, &Editor::map_position_change), frame));
 
@@ -1124,7 +950,7 @@ Editor::map_position_change (jack_nframes_t frame)
 }      
 
 void
-Editor::center_screen (jack_nframes_t frame)
+Editor::center_screen (nframes_t frame)
 {
        double page = canvas_width * frames_per_unit;
 
@@ -1137,17 +963,17 @@ Editor::center_screen (jack_nframes_t frame)
 }
 
 void
-Editor::center_screen_internal (jack_nframes_t frame, float page)
+Editor::center_screen_internal (nframes_t frame, float page)
 {
        page /= 2;
                
        if (frame > page) {
-               frame -= (jack_nframes_t) page;
+               frame -= (nframes_t) page;
        } else {
                frame = 0;
        }
 
-    reposition_x_origin (frame);
+       reset_x_origin (frame);
 }
 
 void
@@ -1155,7 +981,7 @@ Editor::handle_new_duration ()
 {
        ENSURE_GUI_THREAD (mem_fun (*this, &Editor::handle_new_duration));
 
-       jack_nframes_t new_end = session->get_maximum_extent() + (jack_nframes_t) floorf (current_page_frames() * 0.10f);
+       nframes_t new_end = session->get_maximum_extent() + (nframes_t) floorf (current_page_frames() * 0.10f);
                                  
        if (new_end > last_canvas_frame) {
                last_canvas_frame = new_end;
@@ -1207,13 +1033,21 @@ Editor::connect_to_session (Session *t)
 {
        session = t;
 
+       XMLNode* node = ARDOUR_UI::instance()->editor_settings();
+       set_state (*node);
+
+       /* catch up with the playhead */
+
+       session->request_locate (playhead_cursor->current_frame);
+
        if (first_action_message) {
                first_action_message->hide();
        }
 
        update_title ();
 
-       session->going_away.connect (mem_fun(*this, &Editor::session_going_away));
+       session->GoingAway.connect (mem_fun(*this, &Editor::session_going_away));
+       session->history().Changed.connect (mem_fun (*this, &Editor::history_changed));
 
        /* 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,
@@ -1222,7 +1056,7 @@ Editor::connect_to_session (Session *t)
 
        session_connections.push_back (session->TransportStateChange.connect (mem_fun(*this, &Editor::map_transport_state)));
        session_connections.push_back (session->PositionChanged.connect (mem_fun(*this, &Editor::map_position_change)));
-       session_connections.push_back (session->RouteAdded.connect (mem_fun(*this, &Editor::handle_new_route_p)));
+       session_connections.push_back (session->RouteAdded.connect (mem_fun(*this, &Editor::handle_new_route)));
        session_connections.push_back (session->AudioRegionAdded.connect (mem_fun(*this, &Editor::handle_new_audio_region)));
        session_connections.push_back (session->AudioRegionRemoved.connect (mem_fun(*this, &Editor::handle_audio_region_removed)));
        session_connections.push_back (session->DurationChanged.connect (mem_fun(*this, &Editor::handle_new_duration)));
@@ -1236,15 +1070,12 @@ Editor::connect_to_session (Session *t)
        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->SMPTETypeChanged.connect (mem_fun(*this, &Editor::update_just_smpte)));
 
        session_connections.push_back (session->tempo_map().StateChanged.connect (mem_fun(*this, &Editor::tempo_map_changed)));
 
        edit_groups_changed ();
 
        edit_cursor_clock.set_session (session);
-       selection_start_clock.set_session (session);
-       selection_end_clock.set_session (session);
        zoom_range_clock.set_session (session);
        _playlist_selector->set_session (session);
        nudge_clock.set_session (session);
@@ -1254,16 +1085,6 @@ Editor::connect_to_session (Session *t)
                analysis_window->set_session (session);
 #endif
 
-       switch (session->get_edit_mode()) {
-       case Splice:
-               edit_mode_selector.set_active_text (edit_mode_strings[splice_index]);
-               break;
-
-       case Slide:
-               edit_mode_selector.set_active_text (edit_mode_strings[slide_index]);
-               break;
-       }
-
        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));
@@ -1292,10 +1113,8 @@ Editor::connect_to_session (Session *t)
                loc->set_name (_("Punch"));
        }
 
-       update_loop_range_view (true);
-       update_punch_range_view (true);
+       Config->map_parameters (mem_fun (*this, &Editor::parameter_changed));
        
-       session->ControlChanged.connect (mem_fun(*this, &Editor::queue_session_control_changed));
        session->StateSaved.connect (mem_fun(*this, &Editor::session_state_saved));
        
        refresh_location_display ();
@@ -1305,32 +1124,6 @@ Editor::connect_to_session (Session *t)
        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));
 
-       bool yn;
-       RefPtr<Action> act;
-
-       act = ActionManager::get_action (X_("Editor"), X_("toggle-xfades-active"));
-       if (act) {
-               RefPtr<ToggleAction> tact = RefPtr<ToggleAction>::cast_dynamic(act);
-               /* do it twice to force the change */
-               yn = session->get_crossfades_active();
-               tact->set_active (!yn);
-               tact->set_active (yn);
-       }
-
-       act = ActionManager::get_action (X_("Editor"), X_("toggle-auto-xfades"));
-       if (act) {
-               RefPtr<ToggleAction> tact = RefPtr<ToggleAction>::cast_dynamic(act);
-               /* do it twice to force the change */
-               yn = Config->get_auto_xfade ();
-               tact->set_active (!yn);
-               tact->set_active (yn);
-       }
-
-       /* xfade visibility state set from editor::set_state() */
-       
-       update_crossfade_model ();
-       update_layering_model ();
-
        handle_new_duration ();
 
        redisplay_regions ();
@@ -1343,26 +1136,12 @@ Editor::connect_to_session (Session *t)
                (static_cast<TimeAxisView*>(*i))->set_samples_per_unit (frames_per_unit);
        }
 
-       /* ::reposition_x_origin() doesn't work right here, since the old
-          position may be zero already, and it does nothing in such
-          circumstances.
-       */
-
-       leftmost_frame = 0;
-       
-       horizontal_adjustment.set_value (0);
-
        restore_ruler_visibility ();
-       tempo_map_changed (Change (0));
-
-       edit_cursor->set_position (0);
-       playhead_cursor->set_position (0);
+       //tempo_map_changed (Change (0));
+       session->tempo_map().apply_with_metrics (*this, &Editor::draw_metric_marks);
 
        start_scrolling ();
 
-       XMLNode* node = ARDOUR_UI::instance()->editor_settings();
-       set_state (*node);
-
        /* don't show master bus in a new session */
 
        if (ARDOUR_UI::instance()->session_is_new ()) {
@@ -1377,7 +1156,7 @@ Editor::connect_to_session (Session *t)
                        AudioTimeAxisView *atv;
                        
                        if ((atv = dynamic_cast<AudioTimeAxisView*>(tv)) != 0) {
-                               if (atv->route().master()) {
+                               if (atv->route()->master()) {
                                        route_list_display.get_selection()->unselect (i);
                                }
                        }
@@ -1386,6 +1165,10 @@ Editor::connect_to_session (Session *t)
                no_route_list_redisplay = false;
                redisplay_route_list ();
        }
+
+        /* register for undo history */
+
+        session->register_with_memento_command_factory(_id, this);
 }
 
 void
@@ -1448,38 +1231,39 @@ Editor::popup_fade_context_menu (int button, int32_t time, ArdourCanvas::Item* i
        switch (item_type) {
        case FadeInItem:
        case FadeInHandleItem:
-               if (arv->region.fade_in_active()) {
-                       items.push_back (MenuElem (_("Deactivate"), bind (mem_fun (*arv, &AudioRegionView::set_fade_in_active), false)));
+               if (arv->audio_region()->fade_in_active()) {
+                       items.push_back (MenuElem (_("Deactivate"), bind (mem_fun (*this, &Editor::set_fade_in_active), false)));
                } else {
-                       items.push_back (MenuElem (_("Activate"), bind (mem_fun (*arv, &AudioRegionView::set_fade_in_active), true)));
+                       items.push_back (MenuElem (_("Activate"), bind (mem_fun (*this, &Editor::set_fade_in_active), true)));
                }
                
                items.push_back (SeparatorElem());
                
-               items.push_back (MenuElem (_("Linear"), bind (mem_fun (arv->region, &AudioRegion::set_fade_in_shape), AudioRegion::Linear)));
-               items.push_back (MenuElem (_("Slowest"), bind (mem_fun (arv->region, &AudioRegion::set_fade_in_shape), AudioRegion::LogB)));
-               items.push_back (MenuElem (_("Slow"), bind (mem_fun (arv->region, &AudioRegion::set_fade_in_shape), AudioRegion::Fast)));
-               items.push_back (MenuElem (_("Fast"), bind (mem_fun (arv->region, &AudioRegion::set_fade_in_shape), AudioRegion::LogA)));
-               items.push_back (MenuElem (_("Fastest"), bind (mem_fun (arv->region, &AudioRegion::set_fade_in_shape), AudioRegion::Slow)));
+               items.push_back (MenuElem (_("Linear"), bind (mem_fun (*this, &Editor::set_fade_in_shape), AudioRegion::Linear)));
+               items.push_back (MenuElem (_("Slowest"), bind (mem_fun (*this, &Editor::set_fade_in_shape), AudioRegion::LogB)));
+               items.push_back (MenuElem (_("Slow"), bind (mem_fun (*this, &Editor::set_fade_in_shape), AudioRegion::Fast)));
+               items.push_back (MenuElem (_("Fast"), bind (mem_fun (*this, &Editor::set_fade_in_shape), AudioRegion::LogA)));
+               items.push_back (MenuElem (_("Fastest"), bind (mem_fun (*this, &Editor::set_fade_in_shape), AudioRegion::Slow)));
                break;
 
        case FadeOutItem:
        case FadeOutHandleItem:
-               if (arv->region.fade_out_active()) {
-                       items.push_back (MenuElem (_("Deactivate"), bind (mem_fun (*arv, &AudioRegionView::set_fade_out_active), false)));
+               if (arv->audio_region()->fade_out_active()) {
+                       items.push_back (MenuElem (_("Deactivate"), bind (mem_fun (*this, &Editor::set_fade_out_active), false)));
                } else {
-                       items.push_back (MenuElem (_("Activate"), bind (mem_fun (*arv, &AudioRegionView::set_fade_out_active), true)));
+                       items.push_back (MenuElem (_("Activate"), bind (mem_fun (*this, &Editor::set_fade_out_active), true)));
                }
                
                items.push_back (SeparatorElem());
                
-               items.push_back (MenuElem (_("Linear"), bind (mem_fun (arv->region, &AudioRegion::set_fade_out_shape), AudioRegion::Linear)));
-               items.push_back (MenuElem (_("Slowest"), bind (mem_fun (arv->region, &AudioRegion::set_fade_out_shape), AudioRegion::Fast)));
-               items.push_back (MenuElem (_("Slow"), bind (mem_fun (arv->region, &AudioRegion::set_fade_out_shape), AudioRegion::LogB)));
-               items.push_back (MenuElem (_("Fast"), bind (mem_fun (arv->region, &AudioRegion::set_fade_out_shape), AudioRegion::LogA)));
-               items.push_back (MenuElem (_("Fastest"), bind (mem_fun (arv->region, &AudioRegion::set_fade_out_shape), AudioRegion::Slow)));
+               items.push_back (MenuElem (_("Linear"), bind (mem_fun (*this, &Editor::set_fade_out_shape), AudioRegion::Linear)));
+               items.push_back (MenuElem (_("Slowest"), bind (mem_fun (*this, &Editor::set_fade_out_shape), AudioRegion::Fast)));
+               items.push_back (MenuElem (_("Slow"), bind (mem_fun (*this, &Editor::set_fade_out_shape), AudioRegion::LogB)));
+               items.push_back (MenuElem (_("Fast"), bind (mem_fun (*this, &Editor::set_fade_out_shape), AudioRegion::LogA)));
+               items.push_back (MenuElem (_("Fastest"), bind (mem_fun (*this, &Editor::set_fade_out_shape), AudioRegion::Slow)));
 
                break;
+
        default:
                fatal << _("programming error: ")
                      << X_("non-fade canvas item passed to popup_fade_context_menu()")
@@ -1491,16 +1275,16 @@ Editor::popup_fade_context_menu (int button, int32_t time, ArdourCanvas::Item* i
 }
 
 void
-Editor::popup_track_context_menu (int button, int32_t time, ItemType item_type, bool with_selection, jack_nframes_t frame)
+Editor::popup_track_context_menu (int button, int32_t time, ItemType item_type, bool with_selection, nframes_t frame)
 {
        using namespace Menu_Helpers;
-       Menu* (Editor::*build_menu_function)(jack_nframes_t);
+       Menu* (Editor::*build_menu_function)(nframes_t);
        Menu *menu;
 
        switch (item_type) {
        case RegionItem:
-       case AudioRegionViewName:
-       case AudioRegionViewNameHighlight:
+       case RegionViewName:
+       case RegionViewNameHighlight:
                if (with_selection) {
                        build_menu_function = &Editor::build_track_selection_context_menu;
                } else {
@@ -1540,25 +1324,26 @@ Editor::popup_track_context_menu (int button, int32_t time, ItemType item_type,
 
        switch (item_type) {
        case RegionItem:
-       case AudioRegionViewName:
-       case AudioRegionViewNameHighlight:
+       case RegionViewName:
+       case RegionViewNameHighlight:
                if (!with_selection) {
                        if (region_edit_menu_split_item) {
-                               if (clicked_regionview && clicked_regionview->region.covers (edit_cursor->current_frame)) {
+                               if (clicked_regionview && clicked_regionview->region()->covers (edit_cursor->current_frame)) {
                                        ActionManager::set_sensitive (ActionManager::edit_cursor_in_region_sensitive_actions, true);
                                } else {
                                        ActionManager::set_sensitive (ActionManager::edit_cursor_in_region_sensitive_actions, false);
                                }
                        }
+                       /*
                        if (region_edit_menu_split_multichannel_item) {
-                               if (clicked_regionview && clicked_regionview->region.n_channels() > 1) {
+                               if (clicked_regionview && clicked_regionview->region().n_channels() > 1) {
                                        // GTK2FIX find the action, change its sensitivity
                                        // region_edit_menu_split_multichannel_item->set_sensitive (true);
                                } else {
                                        // GTK2FIX see above
                                        // region_edit_menu_split_multichannel_item->set_sensitive (false);
                                }
-                       }
+                       }*/
                }
                break;
 
@@ -1605,7 +1390,7 @@ Editor::popup_track_context_menu (int button, int32_t time, ItemType item_type,
 }
 
 Menu*
-Editor::build_track_context_menu (jack_nframes_t ignored)
+Editor::build_track_context_menu (nframes_t ignored)
 {
        using namespace Menu_Helpers;
 
@@ -1617,7 +1402,7 @@ Editor::build_track_context_menu (jack_nframes_t ignored)
 }
 
 Menu*
-Editor::build_track_bus_context_menu (jack_nframes_t ignored)
+Editor::build_track_bus_context_menu (nframes_t ignored)
 {
        using namespace Menu_Helpers;
 
@@ -1629,7 +1414,7 @@ Editor::build_track_bus_context_menu (jack_nframes_t ignored)
 }
 
 Menu*
-Editor::build_track_region_context_menu (jack_nframes_t frame)
+Editor::build_track_region_context_menu (nframes_t frame)
 {
        using namespace Menu_Helpers;
        MenuList& edit_items  = track_region_context_menu.items();
@@ -1638,13 +1423,13 @@ Editor::build_track_region_context_menu (jack_nframes_t frame)
        AudioTimeAxisView* atv = dynamic_cast<AudioTimeAxisView*> (clicked_trackview);
 
        if (atv) {
-               AudioDiskstream* ds;
-               Playlist* pl;
+               boost::shared_ptr<Diskstream> ds;
+               boost::shared_ptr<Playlist> pl;
                
                if ((ds = atv->get_diskstream()) && ((pl = ds->playlist()))) {
-                       Playlist::RegionList* regions = pl->regions_at ((jack_nframes_t) floor ( (double)frame * ds->speed()));
+                       Playlist::RegionList* regions = pl->regions_at ((nframes_t) floor ( (double)frame * ds->speed()));
                        for (Playlist::RegionList::iterator i = regions->begin(); i != regions->end(); ++i) {
-                               add_region_context_items (atv->view, (*i), edit_items);
+                               add_region_context_items (atv->audio_view(), (*i), edit_items);
                        }
                        delete regions;
                }
@@ -1656,7 +1441,7 @@ Editor::build_track_region_context_menu (jack_nframes_t frame)
 }
 
 Menu*
-Editor::build_track_crossfade_context_menu (jack_nframes_t frame)
+Editor::build_track_crossfade_context_menu (nframes_t frame)
 {
        using namespace Menu_Helpers;
        MenuList& edit_items  = track_crossfade_context_menu.items();
@@ -1665,11 +1450,11 @@ Editor::build_track_crossfade_context_menu (jack_nframes_t frame)
        AudioTimeAxisView* atv = dynamic_cast<AudioTimeAxisView*> (clicked_trackview);
 
        if (atv) {
-               AudioDiskstream* ds;
-               Playlist* pl;
-               AudioPlaylist* apl;
+               boost::shared_ptr<Diskstream> ds;
+               boost::shared_ptr<Playlist> pl;
+               boost::shared_ptr<AudioPlaylist> apl;
 
-               if ((ds = atv->get_diskstream()) && ((pl = ds->playlist()) != 0) && ((apl = dynamic_cast<AudioPlaylist*> (pl)) != 0)) {
+               if ((ds = atv->get_diskstream()) && ((pl = ds->playlist()) != 0) && ((apl = boost::dynamic_pointer_cast<AudioPlaylist> (pl)) != 0)) {
 
                        Playlist::RegionList* regions = pl->regions_at (frame);
                        AudioPlaylist::Crossfades xfades;
@@ -1679,11 +1464,11 @@ Editor::build_track_crossfade_context_menu (jack_nframes_t frame)
                        bool many = xfades.size() > 1;
 
                        for (AudioPlaylist::Crossfades::iterator i = xfades.begin(); i != xfades.end(); ++i) {
-                               add_crossfade_context_items (atv->view, (*i), edit_items, many);
+                               add_crossfade_context_items (atv->audio_view(), (*i), edit_items, many);
                        }
 
                        for (Playlist::RegionList::iterator i = regions->begin(); i != regions->end(); ++i) {
-                               add_region_context_items (atv->view, (*i), edit_items);
+                               add_region_context_items (atv->audio_view(), (*i), edit_items);
                        }
 
                        delete regions;
@@ -1736,7 +1521,7 @@ Editor::analyze_range_selection()
 
 
 Menu*
-Editor::build_track_selection_context_menu (jack_nframes_t ignored)
+Editor::build_track_selection_context_menu (nframes_t ignored)
 {
        using namespace Menu_Helpers;
        MenuList& edit_items  = track_selection_context_menu.items();
@@ -1749,7 +1534,7 @@ Editor::build_track_selection_context_menu (jack_nframes_t ignored)
 }
 
 void
-Editor::add_crossfade_context_items (StreamView* view, Crossfade* xfade, Menu_Helpers::MenuList& edit_items, bool many)
+Editor::add_crossfade_context_items (AudioStreamView* view, boost::shared_ptr<Crossfade> xfade, Menu_Helpers::MenuList& edit_items, bool many)
 {
        using namespace Menu_Helpers;
        Menu     *xfade_menu = manage (new Menu);
@@ -1763,8 +1548,8 @@ Editor::add_crossfade_context_items (StreamView* view, Crossfade* xfade, Menu_He
                str = _("Unmute");
        }
 
-       items.push_back (MenuElem (str, bind (mem_fun(*this, &Editor::toggle_xfade_active), xfade)));
-       items.push_back (MenuElem (_("Edit"), bind (mem_fun(*this, &Editor::edit_xfade), xfade)));
+       items.push_back (MenuElem (str, bind (mem_fun(*this, &Editor::toggle_xfade_active), boost::weak_ptr<Crossfade> (xfade))));
+       items.push_back (MenuElem (_("Edit"), bind (mem_fun(*this, &Editor::edit_xfade), boost::weak_ptr<Crossfade> (xfade))));
 
        if (xfade->can_follow_overlap()) {
 
@@ -1778,9 +1563,9 @@ Editor::add_crossfade_context_items (StreamView* view, Crossfade* xfade, Menu_He
        }
 
        if (many) {
-               str = xfade->out().name();
+               str = xfade->out()->name();
                str += "->";
-               str += xfade->in().name();
+               str += xfade->in()->name();
        } else {
                str = _("Crossfade");
        }
@@ -1806,24 +1591,24 @@ Editor::xfade_edit_right_region ()
 }
 
 void
-Editor::add_region_context_items (StreamView* sv, Region* region, Menu_Helpers::MenuList& edit_items)
+Editor::add_region_context_items (AudioStreamView* sv, boost::shared_ptr<Region> region, Menu_Helpers::MenuList& edit_items)
 {
        using namespace Menu_Helpers;
        Menu     *region_menu = manage (new Menu);
        MenuList& items       = region_menu->items();
        region_menu->set_name ("ArdourContextMenu");
        
-       AudioRegion* ar = 0;
+       boost::shared_ptr<AudioRegion> ar;
 
        if (region) {
-               ar = dynamic_cast<AudioRegion*> (region);
+               ar = boost::dynamic_pointer_cast<AudioRegion> (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, region));
+       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 (_("Popup region editor"), mem_fun(*this, &Editor::edit_region)));
        items.push_back (MenuElem (_("Raise to top layer"), mem_fun(*this, &Editor::raise_region_to_top)));
@@ -1843,32 +1628,50 @@ Editor::add_region_context_items (StreamView* sv, Region* region, Menu_Helpers::
 
        items.push_back (SeparatorElem());
 
-       /* XXX hopefully this nonsense will go away with SigC++ 2.X, where the compiler
-          might be able to figure out which overloaded member function to use in
-          a bind() call ...
-       */
+       items.push_back (CheckMenuElem (_("Lock"), mem_fun(*this, &Editor::toggle_region_lock)));
+       region_lock_item = static_cast<CheckMenuItem*>(&items.back());
+       if (region->locked()) {
+               region_lock_item->set_active();
+       }
+       items.push_back (CheckMenuElem (_("Mute"), mem_fun(*this, &Editor::toggle_region_mute)));
+       region_mute_item = static_cast<CheckMenuItem*>(&items.back());
+       if (region->muted()) {
+               region_mute_item->set_active();
+       }
+       items.push_back (CheckMenuElem (_("Opaque"), mem_fun(*this, &Editor::toggle_region_opaque)));
+       region_opaque_item = static_cast<CheckMenuItem*>(&items.back());
+       if (region->opaque()) {
+               region_opaque_item->set_active();
+       }
 
-       void (Editor::*type_A_pmf)(void (Region::*pmf)(bool), bool) = &Editor::region_selection_op;
+       items.push_back (CheckMenuElem (_("Original position"), mem_fun(*this, &Editor::naturalize)));
+       if (region->at_natural_position()) {
+               items.back().set_sensitive (false);
+       }
 
-       items.push_back (MenuElem (_("Lock"), bind (mem_fun(*this, type_A_pmf), &Region::set_locked, true)));
-       items.push_back (MenuElem (_("Unlock"), bind (mem_fun(*this, type_A_pmf), &Region::set_locked, false)));
        items.push_back (SeparatorElem());
 
-       if (region->muted()) {
-               items.push_back (MenuElem (_("Unmute"), bind (mem_fun(*this, type_A_pmf), &Region::set_muted, false)));
-       } else {
-               items.push_back (MenuElem (_("Mute"), bind (mem_fun(*this, type_A_pmf), &Region::set_muted, true)));
-       }
-       items.push_back (SeparatorElem());
+       if (ar) {
+               
+               RegionView* rv = sv->find_view (ar);
+               AudioRegionView* arv = dynamic_cast<AudioRegionView*>(rv);
 
-       items.push_back (MenuElem (_("Original position"), mem_fun(*this, &Editor::naturalize)));
-       items.push_back (SeparatorElem());
+               items.push_back (MenuElem (_("Reset Envelope"), mem_fun(*this, &Editor::reset_region_gain_envelopes)));
+               
+               items.push_back (CheckMenuElem (_("Envelope Visible"), mem_fun(*this, &Editor::toggle_gain_envelope_visibility)));
+               region_envelope_visible_item = static_cast<CheckMenuItem*> (&items.back());
 
+               if (arv->envelope_visible()) {
+                       region_envelope_visible_item->set_active (true);
+               }
 
-       if (ar) {
+               items.push_back (CheckMenuElem (_("Envelope Active"), mem_fun(*this, &Editor::toggle_gain_envelope_active)));
+               region_envelope_active_item = static_cast<CheckMenuItem*> (&items.back());
+
+               if (ar->envelope_active()) {
+                       region_envelope_active_item->set_active (true);
+               }
 
-               items.push_back (MenuElem (_("Toggle envelope visibility"), mem_fun(*this, &Editor::toggle_gain_envelope_visibility)));
-               items.push_back (MenuElem (_("Toggle envelope active"), mem_fun(*this, &Editor::toggle_gain_envelope_active)));
                items.push_back (SeparatorElem());
 
                if (ar->scale_amplitude() != 1.0f) {
@@ -1884,7 +1687,7 @@ Editor::add_region_context_items (StreamView* sv, Region* region, Menu_Helpers::
        /* range related stuff */
 
        items.push_back (MenuElem (_("Add Range Markers"), mem_fun (*this, &Editor::add_location_from_audio_region)));
-       items.push_back (MenuElem (_("Set Range"), mem_fun (*this, &Editor::set_selection_from_audio_region)));
+       items.push_back (MenuElem (_("Set Range Selection"), mem_fun (*this, &Editor::set_selection_from_audio_region)));
        items.push_back (SeparatorElem());
                         
        /* Nudge region */
@@ -1921,8 +1724,6 @@ Editor::add_region_context_items (StreamView* sv, Region* region, Menu_Helpers::
        items.push_back (MenuElem (_("Fill Track"), (mem_fun(*this, &Editor::region_fill_track))));
        items.push_back (SeparatorElem());
        items.push_back (MenuElem (_("Remove"), mem_fun(*this, &Editor::remove_clicked_region)));
-       items.push_back (SeparatorElem());
-       items.push_back (MenuElem (_("Destroy"), mem_fun(*this, &Editor::destroy_clicked_region)));
 
        /* OK, stick the region submenu at the top of the list, and then add
           the standard items.
@@ -1967,13 +1768,14 @@ Editor::add_selection_context_items (Menu_Helpers::MenuList& edit_items)
        items.push_back (SeparatorElem());
        items.push_back (MenuElem (_("Select all in range"), mem_fun(*this, &Editor::select_all_selectables_using_time_selection)));
        items.push_back (SeparatorElem());
+       items.push_back (MenuElem (_("Add Range Markers"), mem_fun (*this, &Editor::add_location_from_selection)));
        items.push_back (MenuElem (_("Set range to loop range"), mem_fun(*this, &Editor::set_selection_from_loop)));
        items.push_back (MenuElem (_("Set range to punch range"), mem_fun(*this, &Editor::set_selection_from_punch)));
        items.push_back (SeparatorElem());
        items.push_back (MenuElem (_("Crop region to range"), mem_fun(*this, &Editor::crop_region_to_selection)));
        items.push_back (MenuElem (_("Fill range with region"), mem_fun(*this, &Editor::region_fill_selection)));
        items.push_back (MenuElem (_("Duplicate range"), bind (mem_fun(*this, &Editor::duplicate_dialog), false)));
-       items.push_back (MenuElem (_("Create chunk from range"), mem_fun(*this, &Editor::name_selection)));
+       items.push_back (MenuElem (_("Create chunk from range"), mem_fun(*this, &Editor::create_named_selection)));
        items.push_back (SeparatorElem());
        items.push_back (MenuElem (_("Bounce range"), mem_fun(*this, &Editor::bounce_range_selection)));
        items.push_back (MenuElem (_("Export range"), mem_fun(*this, &Editor::export_selection)));
@@ -1993,7 +1795,7 @@ Editor::add_dstream_context_items (Menu_Helpers::MenuList& edit_items)
        MenuList& play_items = play_menu->items();
        play_menu->set_name ("ArdourContextMenu");
        
-       play_items.push_back (MenuElem (_("Play from edit cursor")));
+       play_items.push_back (MenuElem (_("Play from edit cursor"), mem_fun(*this, &Editor::play_from_edit_cursor)));
        play_items.push_back (MenuElem (_("Play from start"), mem_fun(*this, &Editor::play_from_start)));
        play_items.push_back (MenuElem (_("Play region"), mem_fun(*this, &Editor::play_selected_region)));
        play_items.push_back (SeparatorElem());
@@ -2078,7 +1880,7 @@ Editor::add_bus_context_items (Menu_Helpers::MenuList& edit_items)
        MenuList& play_items = play_menu->items();
        play_menu->set_name ("ArdourContextMenu");
        
-       play_items.push_back (MenuElem (_("Play from edit cursor")));
+       play_items.push_back (MenuElem (_("Play from edit cursor"), mem_fun(*this, &Editor::play_from_edit_cursor)));
        play_items.push_back (MenuElem (_("Play from start"), mem_fun(*this, &Editor::play_from_start)));
        edit_items.push_back (MenuElem (_("Play"), *play_menu));
 
@@ -2129,8 +1931,11 @@ void
 Editor::set_snap_to (SnapType st)
 {
        snap_type = st;
-       vector<string> txt = internationalize (snap_type_strings);
-       snap_type_selector.set_active_text (txt[(int)st]);
+       string str = snap_type_strings[(int) st];
+
+       if (str != snap_type_selector.get_active_text()) {
+               snap_type_selector.set_active_text (str);
+       }
 
        instant_save ();
 
@@ -2151,8 +1956,11 @@ void
 Editor::set_snap_mode (SnapMode mode)
 {
        snap_mode = mode;
-       vector<string> txt = internationalize (snap_mode_strings);
-       snap_mode_selector.set_active_text (txt[(int)mode]);
+       string str = snap_mode_strings[(int)mode];
+
+       if (str != snap_mode_selector.get_active_text ()) {
+               snap_mode_selector.set_active_text (str);
+       }
 
        instant_save ();
 }
@@ -2165,6 +1973,9 @@ Editor::set_state (const XMLNode& node)
        int x, y, xoff, yoff;
        Gdk::Geometry g;
 
+       if ((prop = node.property ("id")) != 0) {
+               _id = prop->value ();
+       }
 
        if ((geometry = find_named_node (node, "geometry")) == 0) {
 
@@ -2185,16 +1996,37 @@ Editor::set_state (const XMLNode& node)
                yoff = atoi(geometry->property("y_off")->value());
        }
 
-       set_geometry_hints (vpacker, g, Gdk::HINT_BASE_SIZE);
        set_default_size (g.base_width, g.base_height);
        move (x, y);
 
+       if (session && (prop = node.property ("playhead"))) {
+               nframes_t pos = atol (prop->value().c_str());
+               playhead_cursor->set_position (pos);
+       } else {
+               playhead_cursor->set_position (0);
+
+               /* reset_x_origin() doesn't work right here, since the old
+                  position may be zero already, and it does nothing in such
+                  circumstances.
+               */
+               
+               leftmost_frame = 0;
+               horizontal_adjustment.set_value (0);
+       }
+
+       if (session && (prop = node.property ("edit-cursor"))) {
+               nframes_t pos = atol (prop->value().c_str());
+               edit_cursor->set_position (pos);
+       } else {
+               edit_cursor->set_position (0);
+       }
+
        if ((prop = node.property ("zoom-focus"))) {
                set_zoom_focus ((ZoomFocus) atoi (prop->value()));
        }
 
        if ((prop = node.property ("zoom"))) {
-               set_frames_per_unit (PBD::atof (prop->value()));
+               reset_zoom (PBD::atof (prop->value()));
        }
 
        if ((prop = node.property ("snap-to"))) {
@@ -2277,6 +2109,7 @@ Editor::set_state (const XMLNode& node)
 
                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);
                        bool yn = (prop->value() == X_("yes"));
 
@@ -2287,6 +2120,7 @@ Editor::set_state (const XMLNode& node)
                }
        }
 
+
        return 0;
 }
 
@@ -2296,8 +2130,11 @@ Editor::get_state ()
        XMLNode* node = new XMLNode ("Editor");
        char buf[32];
 
+       _id.print (buf, sizeof (buf));
+       node->add_property ("id", buf);
+       
        if (is_realized()) {
-               Glib::RefPtr<Gdk::Window> win = get_window();
+               Glib::RefPtr<Gdk::Window> win = get_window();
                
                int x, y, xoff, yoff, width, height;
                win->get_root_origin(x, y);
@@ -2305,7 +2142,7 @@ Editor::get_state ()
                win->get_size(width, height);
                
                XMLNode* geometry = new XMLNode ("geometry");
-               char buf[32];
+
                snprintf(buf, sizeof(buf), "%d", width);
                geometry->add_property("x_size", string(buf));
                snprintf(buf, sizeof(buf), "%d", height);
@@ -2333,6 +2170,11 @@ Editor::get_state ()
        snprintf (buf, sizeof(buf), "%d", (int) snap_mode);
        node->add_property ("snap-mode", buf);
 
+       snprintf (buf, sizeof (buf), "%" PRIu32, playhead_cursor->current_frame);
+       node->add_property ("playhead", buf);
+       snprintf (buf, sizeof (buf), "%" PRIu32, edit_cursor->current_frame);
+       node->add_property ("edit-cursor", buf);
+
        node->add_property ("show-waveforms", _show_waveforms ? "yes" : "no");
        node->add_property ("show-waveforms-recording", _show_waveforms_recording ? "yes" : "no");
        node->add_property ("show-measures", _show_measures ? "yes" : "no");
@@ -2355,18 +2197,11 @@ Editor::get_state ()
 TimeAxisView *
 Editor::trackview_by_y_position (double y)
 {
-       TrackViewList::iterator iter;
-       TimeAxisView *tv;
-
-       for (iter = track_views.begin(); iter != track_views.end(); ++iter) {
+       for (TrackViewList::iterator iter = track_views.begin(); iter != track_views.end(); ++iter) {
 
-               tv = *iter;
-
-               if (tv->hidden()) {
-                       continue;
-               }
+               TimeAxisView *tv;
 
-               if (tv->y_position <= y && y < ((tv->y_position + tv->height + track_spacing))) {
+               if ((tv = (*iter)->covers_y_position (y)) != 0) {
                        return tv;
                }
        }
@@ -2375,7 +2210,7 @@ Editor::trackview_by_y_position (double y)
 }
 
 void
-Editor::snap_to (jack_nframes_t& start, int32_t direction, bool for_mark)
+Editor::snap_to (nframes_t& start, int32_t direction, bool for_mark)
 {
        Location* before = 0;
        Location* after = 0;
@@ -2384,10 +2219,11 @@ Editor::snap_to (jack_nframes_t& start, int32_t direction, bool for_mark)
                return;
        }
 
-       const jack_nframes_t one_second = session->frame_rate();
-       const jack_nframes_t one_minute = session->frame_rate() * 60;
-
-       jack_nframes_t presnap = start;
+       const nframes_t one_second = session->frame_rate();
+       const nframes_t one_minute = session->frame_rate() * 60;
+       const nframes_t one_smpte_second = (nframes_t)(rint(session->smpte_frames_per_second()) * session->frames_per_smpte_frame());
+       nframes_t one_smpte_minute = (nframes_t)(rint(session->smpte_frames_per_second()) * session->frames_per_smpte_frame() * 60);
+       nframes_t presnap = start;
 
        switch (snap_type) {
        case SnapToFrame:
@@ -2395,16 +2231,17 @@ Editor::snap_to (jack_nframes_t& start, int32_t direction, bool for_mark)
 
        case SnapToCDFrame:
                if (direction) {
-                       start = (jack_nframes_t) ceil ((double) start / (one_second / 75)) * (one_second / 75);
+                       start = (nframes_t) ceil ((double) start / (one_second / 75)) * (one_second / 75);
                } else {
-                       start = (jack_nframes_t) floor ((double) start / (one_second / 75)) * (one_second / 75);
+                       start = (nframes_t) floor ((double) start / (one_second / 75)) * (one_second / 75);
                }
                break;
+
        case SnapToSMPTEFrame:
-               if (direction) {
-                       start = (jack_nframes_t) (ceil ((double) start / session->frames_per_smpte_frame()) * session->frames_per_smpte_frame());
+               if (fmod((double)start, (double)session->frames_per_smpte_frame()) > (session->frames_per_smpte_frame() / 2)) {
+                       start = (nframes_t) (ceil ((double) start / session->frames_per_smpte_frame()) * session->frames_per_smpte_frame());
                } else {
-                       start = (jack_nframes_t) (floor ((double) start / session->frames_per_smpte_frame()) *  session->frames_per_smpte_frame());
+                       start = (nframes_t) (floor ((double) start / session->frames_per_smpte_frame()) *  session->frames_per_smpte_frame());
                }
                break;
 
@@ -2415,10 +2252,10 @@ Editor::snap_to (jack_nframes_t& start, int32_t direction, bool for_mark)
                } else {
                        start -= session->smpte_offset ();
                }    
-               if (direction > 0) {
-                       start = (jack_nframes_t) ceil ((double) start / one_second) * one_second;
+               if (start % one_smpte_second > one_smpte_second / 2) {
+                       start = (nframes_t) ceil ((double) start / one_smpte_second) * one_smpte_second;
                } else {
-                       start = (jack_nframes_t) floor ((double) start / one_second) * one_second;
+                       start = (nframes_t) floor ((double) start / one_smpte_second) * one_smpte_second;
                }
                
                if (session->smpte_offset_negative())
@@ -2436,10 +2273,10 @@ Editor::snap_to (jack_nframes_t& start, int32_t direction, bool for_mark)
                } else {
                        start -= session->smpte_offset ();
                }
-               if (direction) {
-                       start = (jack_nframes_t) ceil ((double) start / one_minute) * one_minute;
+               if (start % one_smpte_minute > one_smpte_minute / 2) {
+                       start = (nframes_t) ceil ((double) start / one_smpte_minute) * one_smpte_minute;
                } else {
-                       start = (jack_nframes_t) floor ((double) start / one_minute) * one_minute;
+                       start = (nframes_t) floor ((double) start / one_smpte_minute) * one_smpte_minute;
                }
                if (session->smpte_offset_negative())
                {
@@ -2450,18 +2287,18 @@ Editor::snap_to (jack_nframes_t& start, int32_t direction, bool for_mark)
                break;
                
        case SnapToSeconds:
-               if (direction) {
-                       start = (jack_nframes_t) ceil ((double) start / one_second) * one_second;
+               if (start % one_second > one_second / 2) {
+                       start = (nframes_t) ceil ((double) start / one_second) * one_second;
                } else {
-                       start = (jack_nframes_t) floor ((double) start / one_second) * one_second;
+                       start = (nframes_t) floor ((double) start / one_second) * one_second;
                }
                break;
                
        case SnapToMinutes:
-               if (direction) {
-                       start = (jack_nframes_t) ceil ((double) start / one_minute) * one_minute;
+               if (start % one_minute > one_minute / 2) {
+                       start = (nframes_t) ceil ((double) start / one_minute) * one_minute;
                } else {
-                       start = (jack_nframes_t) floor ((double) start / one_minute) * one_minute;
+                       start = (nframes_t) floor ((double) start / one_minute) * one_minute;
                }
                break;
 
@@ -2542,7 +2379,7 @@ Editor::snap_to (jack_nframes_t& start, int32_t direction, bool for_mark)
        case SnapToRegionSync:
        case SnapToRegionBoundary:
                if (!region_boundary_cache.empty()) {
-                       vector<jack_nframes_t>::iterator i;
+                       vector<nframes_t>::iterator i;
 
                        if (direction > 0) {
                                i = std::upper_bound (region_boundary_cache.begin(), region_boundary_cache.end(), start);
@@ -2586,30 +2423,60 @@ void
 Editor::setup_toolbar ()
 {
        string pixmap_path;
+
+       const guint32 FUDGE = 18; // Combo's are stupid - they steal space from the entry for the button
+
+
+       /* 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);
+       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_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_mode_buttons.push_back (&mouse_audition_button);
+       
        mouse_mode_button_set = new GroupedButtons (mouse_mode_buttons);
 
-       mouse_mode_button_table.set_homogeneous (true);
-       mouse_mode_button_table.set_col_spacings (2);
-       mouse_mode_button_table.set_row_spacings (2);
-       mouse_mode_button_table.set_border_width (5);
+       HBox* mode_box = manage(new HBox);
+       mode_box->set_border_width (2);
+       mode_box->set_spacing(4);
+       mouse_mode_button_box.set_spacing(1);
+       mouse_mode_button_box.pack_start(mouse_move_button, true, true);
+       mouse_mode_button_box.pack_start(mouse_select_button, true, true);
+       mouse_mode_button_box.pack_start(mouse_zoom_button, true, true);
+       mouse_mode_button_box.pack_start(mouse_gain_button, true, true);
+       mouse_mode_button_box.pack_start(mouse_timefx_button, true, true);
+       mouse_mode_button_box.pack_start(mouse_audition_button, true, true);
+       mouse_mode_button_box.set_homogeneous(true);
+
+       vector<string> edit_mode_strings;
+       edit_mode_strings.push_back (edit_mode_to_string (Splice));
+       edit_mode_strings.push_back (edit_mode_to_string (Slide));
 
-       mouse_mode_button_table.attach (mouse_move_button, 0, 1, 0, 1);
-       mouse_mode_button_table.attach (mouse_select_button, 1, 2, 0, 1);
-       mouse_mode_button_table.attach (mouse_zoom_button, 2, 3, 0, 1);
-       mouse_mode_button_table.attach (mouse_gain_button, 0, 1, 1, 2);
-       mouse_mode_button_table.attach (mouse_timefx_button, 1, 2, 1, 2);
-       mouse_mode_button_table.attach (mouse_audition_button, 2, 3, 1, 2);
+       edit_mode_selector.set_name ("EditModeSelector");
+       Gtkmm2ext::set_size_request_to_display_given_text (edit_mode_selector, longest (edit_mode_strings).c_str(), 2+FUDGE, 10);
+       set_popdown_strings (edit_mode_selector, edit_mode_strings);
+       edit_mode_selector.signal_changed().connect (mem_fun(*this, &Editor::edit_mode_selection_done));
 
-       mouse_mode_tearoff = manage (new TearOff (mouse_mode_button_table));
+       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->Detach.connect (bind (mem_fun(*this, &Editor::detach_tearoff), static_cast<Box*>(&toolbar_hbox), 
@@ -2628,12 +2495,12 @@ Editor::setup_toolbar ()
        mouse_timefx_button.set_name ("MouseModeButton");
        mouse_audition_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_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"));
 
        mouse_move_button.unset_flags (CAN_FOCUS);
        mouse_select_button.unset_flags (CAN_FOCUS);
@@ -2652,160 +2519,81 @@ Editor::setup_toolbar ()
        mouse_audition_button.signal_toggled().connect (bind (mem_fun(*this, &Editor::mouse_mode_toggled), Editing::MouseAudition));
 
        // mouse_move_button.set_active (true);
+       
 
-       /* automation control */
+       /* Zoom */
+       
+       zoom_box.set_spacing (1);
+       zoom_box.set_border_width (2);
 
-       global_automation_button.set_name ("MouseModeButton");
-       automation_mode_button.set_name ("MouseModeButton");
+       zoom_in_button.set_name ("EditorTimeButton");
+       zoom_in_button.set_size_request(-1,16);
+       zoom_in_button.add (*(manage (new Image (::get_icon("zoom_in")))));
+       zoom_in_button.signal_clicked().connect (bind (mem_fun(*this, &Editor::temporal_zoom_step), false));
+       ARDOUR_UI::instance()->tooltips().set_tip (zoom_in_button, _("Zoom In"));
+       
+       zoom_out_button.set_name ("EditorTimeButton");
+       zoom_out_button.set_size_request(-1,16);
+       zoom_out_button.add (*(manage (new Image (::get_icon("zoom_out")))));
+       zoom_out_button.signal_clicked().connect (bind (mem_fun(*this, &Editor::temporal_zoom_step), true));
+       ARDOUR_UI::instance()->tooltips().set_tip (zoom_out_button, _("Zoom Out"));
 
-       automation_box.set_spacing (2);
-       automation_box.set_border_width (2);
-       automation_box.pack_start (global_automation_button, false, false);
-       automation_box.pack_start (automation_mode_button, false, false);
+       zoom_out_full_button.set_name ("EditorTimeButton");
+       zoom_out_full_button.set_size_request(-1,16);
+       zoom_out_full_button.add (*(manage (new Image (::get_icon("zoom_full")))));
+       zoom_out_full_button.signal_clicked().connect (mem_fun(*this, &Editor::temporal_zoom_session));
+       ARDOUR_UI::instance()->tooltips().set_tip (zoom_out_full_button, _("Zoom to Session"));
 
-       /* Edit mode */
+       zoom_focus_selector.set_name ("ZoomFocusSelector");
+       Gtkmm2ext::set_size_request_to_display_given_text (zoom_focus_selector, "Edit Cursor", FUDGE, 0);
+       set_popdown_strings (zoom_focus_selector, zoom_focus_strings);
+       zoom_focus_selector.signal_changed().connect (mem_fun(*this, &Editor::zoom_focus_selection_done));
+       ARDOUR_UI::instance()->tooltips().set_tip (zoom_focus_selector, _("Zoom focus"));
 
-       edit_mode_label.set_name ("ToolBarLabel");
+       zoom_box.pack_start (zoom_focus_selector, true, true);
+       zoom_box.pack_start (zoom_out_button, false, false);
+       zoom_box.pack_start (zoom_in_button, false, false);
+       zoom_box.pack_start (zoom_out_full_button, false, false);
 
-       edit_mode_selector.set_name ("EditModeSelector");
+       /* Edit Cursor / Snap */
 
-       edit_mode_box.set_spacing (3);
-       edit_mode_box.set_border_width (3);
+       snap_box.set_spacing (1);
+       snap_box.set_border_width (2);
 
-       /* XXX another disgusting hack because of the way combo boxes size themselves */
+       snap_type_selector.set_name ("SnapTypeSelector");
+       Gtkmm2ext::set_size_request_to_display_given_text (snap_type_selector, "SMPTE Seconds", 2+FUDGE, 10);
+       set_popdown_strings (snap_type_selector, snap_type_strings);
+       snap_type_selector.signal_changed().connect (mem_fun(*this, &Editor::snap_type_selection_done));
+       ARDOUR_UI::instance()->tooltips().set_tip (snap_type_selector, _("Unit to snap cursors and ranges to"));
 
-       const guint32 FUDGE = 20; // Combo's are stupid - they steal space from the entry for the button
-       Gtkmm2ext::set_size_request_to_display_given_text (edit_mode_selector, "EdgtMode", 2+FUDGE, 10);
-       set_popdown_strings (edit_mode_selector, internationalize (edit_mode_strings));
-       edit_mode_box.pack_start (edit_mode_label, false, false);
-       edit_mode_box.pack_start (edit_mode_selector, false, false);
+       snap_mode_selector.set_name ("SnapModeSelector");
+       Gtkmm2ext::set_size_request_to_display_given_text (snap_mode_selector, "Magnetic Snap", 2+FUDGE, 10);
+       set_popdown_strings (snap_mode_selector, snap_mode_strings);
+       snap_mode_selector.signal_changed().connect (mem_fun(*this, &Editor::snap_mode_selection_done));
 
-       edit_mode_selector.signal_changed().connect (mem_fun(*this, &Editor::edit_mode_selection_done));
+       snap_box.pack_start (edit_cursor_clock, false, false);
+       snap_box.pack_start (snap_mode_selector, false, false);
+       snap_box.pack_start (snap_type_selector, false, false);
 
-       /* Snap Type */
 
-       snap_type_label.set_name ("ToolBarLabel");
+       /* Nudge */
 
-       snap_type_selector.set_name ("SnapTypeSelector");
+       HBox *nudge_box = manage (new HBox);
+       nudge_box->set_spacing(1);
+       nudge_box->set_border_width (2);
 
-       snap_type_box.set_spacing (3);
-       snap_type_box.set_border_width (3);
+       nudge_forward_button.signal_clicked().connect (bind (mem_fun(*this, &Editor::nudge_forward), false));
+       nudge_backward_button.signal_clicked().connect (bind (mem_fun(*this, &Editor::nudge_backward), false));
 
-       /* XXX another disgusting hack because of the way combo boxes size themselves */
+       nudge_box->pack_start (nudge_backward_button, false, false);
+       nudge_box->pack_start (nudge_forward_button, false, false);
+       nudge_box->pack_start (nudge_clock, false, false);
 
-       Gtkmm2ext::set_size_request_to_display_given_text (snap_type_selector, "SMPTE Seconds", 2+FUDGE, 10);
-       set_popdown_strings (snap_type_selector, internationalize (snap_type_strings));
 
-       snap_type_box.pack_start (snap_type_label, false, false);
-       snap_type_box.pack_start (snap_type_selector, false, false);
-
-       snap_type_selector.signal_changed().connect (mem_fun(*this, &Editor::snap_type_selection_done));
-
-       /* Snap mode, not snap type */
-
-       snap_mode_label.set_name ("ToolBarLabel");
-
-       snap_mode_selector.set_name ("SnapModeSelector");
-       
-       snap_mode_box.set_spacing (3);
-       snap_mode_box.set_border_width (3);
-
-       Gtkmm2ext::set_size_request_to_display_given_text (snap_mode_selector, "SngpMode", 2+FUDGE, 10);
-       set_popdown_strings (snap_mode_selector, internationalize (snap_mode_strings));
-
-       snap_mode_box.pack_start (snap_mode_label, false, false);
-       snap_mode_box.pack_start (snap_mode_selector, false, false);
-
-       snap_mode_selector.signal_changed().connect (mem_fun(*this, &Editor::snap_mode_selection_done));
-
-       /* Zoom focus mode */
-
-       zoom_focus_label.set_name ("ToolBarLabel");
-
-       zoom_focus_selector.set_name ("ZoomFocusSelector");
-
-       zoom_focus_box.set_spacing (3);
-       zoom_focus_box.set_border_width (3);
-
-       /* XXX another disgusting hack because of the way combo boxes size themselves */
-
-       Gtkmm2ext::set_size_request_to_display_given_text (zoom_focus_selector, "Edgt Cursor", 2+FUDGE, 10);
-       set_popdown_strings (zoom_focus_selector, internationalize (zoom_focus_strings));
-
-       zoom_focus_box.pack_start (zoom_focus_label, false, false);
-       zoom_focus_box.pack_start (zoom_focus_selector, false, false);
-
-       zoom_focus_selector.signal_changed().connect (mem_fun(*this, &Editor::zoom_focus_selection_done));
-
-       /* selection/cursor clocks */
-
-       toolbar_selection_cursor_label.set_name ("ToolBarLabel");
-       selection_start_clock_label.set_name ("ToolBarLabel");
-       selection_end_clock_label.set_name ("ToolBarLabel");
-       edit_cursor_clock_label.set_name ("ToolBarLabel");
-
-       selection_start_clock_label.set_text (_("Start:"));
-       selection_end_clock_label.set_text (_("End:"));
-       edit_cursor_clock_label.set_text (_("Edit"));
-
-       /* the zoom in/out buttons are generally taller than the clocks, so
-          put all the toolbar clocks into a size group with one of the 
-          buttons to make them all equal height.
-
-          this also applies to the various toolbar combos
-       */
-
-       RefPtr<SizeGroup> toolbar_clock_size_group = SizeGroup::create (SIZE_GROUP_VERTICAL);
-       toolbar_clock_size_group->add_widget (zoom_out_button);
-       toolbar_clock_size_group->add_widget (edit_cursor_clock);
-       toolbar_clock_size_group->add_widget (zoom_range_clock);
-       toolbar_clock_size_group->add_widget (nudge_clock);
-       toolbar_clock_size_group->add_widget (edit_mode_selector);
-       toolbar_clock_size_group->add_widget (snap_type_selector);
-       toolbar_clock_size_group->add_widget (snap_mode_selector);
-       toolbar_clock_size_group->add_widget (zoom_focus_selector);
-
-       HBox* edit_clock_hbox = manage (new HBox());
-       VBox* edit_clock_vbox = manage (new VBox());
-
-       edit_clock_hbox->pack_start (edit_cursor_clock, false, false);
-
-       edit_clock_vbox->set_spacing (3);
-       edit_clock_vbox->set_border_width (3);
-       edit_clock_vbox->pack_start (edit_cursor_clock_label, false, false);
-       edit_clock_vbox->pack_start (*edit_clock_hbox, false, false);
+       /* Pack everything in... */
 
        HBox* hbox = new HBox;
-
-       hbox->pack_start (*edit_clock_vbox, false, false);
-       hbox->pack_start (zoom_indicator_vbox, false, false); 
-       hbox->pack_start (zoom_focus_box, false, false);
-       hbox->pack_start (snap_type_box, false, false);
-       hbox->pack_start (snap_mode_box, false, false);
-       hbox->pack_start (edit_mode_box, false, false);
-
-       VBox *vbox = manage (new VBox);
-
-       vbox->set_spacing (3);
-       vbox->set_border_width (3);
-
-       HBox *nbox = manage (new HBox);
-       
-       nudge_forward_button.signal_clicked().connect (bind (mem_fun(*this, &Editor::nudge_forward), false));
-       nudge_backward_button.signal_clicked().connect (bind (mem_fun(*this, &Editor::nudge_backward), false));
-
-       nbox->pack_start (nudge_backward_button, false, false);
-       nbox->pack_start (nudge_forward_button, false, false);
-       nbox->pack_start (nudge_clock, false, false, 5);
-
-       nudge_label.set_name ("ToolBarLabel");
-
-       vbox->pack_start (nudge_label, false, false);
-       vbox->pack_start (*nbox, false, false);
-
-       hbox->pack_start (*vbox, false, false);
-
-       hbox->show_all ();
+       hbox->set_spacing(10);
 
        tools_tearoff = new TearOff (*hbox);
        tools_tearoff->set_name ("MouseModeBase");
@@ -2819,11 +2607,18 @@ Editor::setup_toolbar ()
        tools_tearoff->Visible.connect (bind (mem_fun(*this, &Editor::reattach_tearoff), static_cast<Box*> (&toolbar_hbox), 
                                              &tools_tearoff->tearoff_window(), 0));
 
-       toolbar_hbox.set_spacing (8);
-       toolbar_hbox.set_border_width (2);
+       toolbar_hbox.set_spacing (10);
+       toolbar_hbox.set_border_width (1);
 
-       toolbar_hbox.pack_start (*tools_tearoff, false, false);
        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->show_all ();
        
        toolbar_base.set_name ("ToolBarBase");
        toolbar_base.add (toolbar_hbox);
@@ -2980,432 +2775,8 @@ void
 Editor::commit_reversible_command ()
 {
        if (session) {
-               session->commit_reversible_command (new MementoCommand<Editor>(*this, *before, get_state()));
-       }
-}
-
-bool
-Editor::set_selected_track_from_click (bool press, Selection::Operation op, bool with_undo, bool no_remove)
-{
-       bool commit = false;
-
-       if (!clicked_trackview) {
-               return false;
-       }
-
-       switch (op) {
-       case Selection::Toggle:
-               if (selection->selected (clicked_trackview)) {
-                       if (!no_remove) {
-                               selection->remove (clicked_trackview);
-                               commit = true;
-                       }
-               } else {
-                       selection->add (clicked_trackview);
-                       commit = false;
-               }
-               break;
-
-       case Selection::Set:
-               if (selection->selected (clicked_trackview) && selection->tracks.size() == 1) {
-                       /* no commit necessary */
-               } 
-
-               selection->set (clicked_trackview);
-               break;
-               
-       case Selection::Extend:
-               /* not defined yet */
-               break;
-       }
-
-       return commit;
-}
-
-bool
-Editor::set_selected_control_point_from_click (bool press, Selection::Operation op, bool with_undo, bool no_remove)
-{
-       if (!clicked_control_point) {
-               return false;
-       }
-
-       /* select this point and any others that it represents */
-
-       double y1, y2;
-       jack_nframes_t x1, x2;
-
-       x1 = pixel_to_frame (clicked_control_point->get_x() - 10);
-       x2 = pixel_to_frame (clicked_control_point->get_x() + 10);
-       y1 = clicked_control_point->get_x() - 10;
-       y2 = clicked_control_point->get_y() + 10;
-
-       return select_all_within (x1, x2, y1, y2, op);
-}
-
-void
-Editor::get_relevant_audio_tracks (AudioTimeAxisView& base, set<AudioTimeAxisView*>& relevant_tracks)
-{
-       /* step one: get all selected tracks and all tracks in the relevant edit groups */
-
-       for (TrackSelection::iterator ti = selection->tracks.begin(); ti != selection->tracks.end(); ++ti) {
-
-               AudioTimeAxisView* atv = dynamic_cast<AudioTimeAxisView*>(*ti);
-
-               if (!atv) {
-                       continue;
-               }
-
-               RouteGroup* group = atv->route().edit_group();
-
-               if (group && group->is_active()) {
-                       
-                       /* active group for this track, loop over all tracks and get every member of the group */
-
-                       for (TrackViewList::iterator i = track_views.begin(); i != track_views.end(); ++i) {
-                               
-                               AudioTimeAxisView* tatv;
-                               
-                               if ((tatv = dynamic_cast<AudioTimeAxisView*> (*i)) != 0) {
-                                       
-                                       if (tatv->route().edit_group() == group) {
-                                               relevant_tracks.insert (tatv);
-                                       }
-                               }
-                       }
-
-               } else {
-
-                       /* no active group, or no group */
-
-                       relevant_tracks.insert (&base);
-               }
-
-       }
-}
-
-void
-Editor::mapover_audio_tracks (slot<void,AudioTimeAxisView&,uint32_t> sl)
-{
-       set<AudioTimeAxisView*> relevant_tracks;
-
-       if (!clicked_audio_trackview) {
-               return;
-       }
-
-       get_relevant_audio_tracks (*clicked_audio_trackview, relevant_tracks);
-
-       uint32_t sz = relevant_tracks.size();
-       
-       for (set<AudioTimeAxisView*>::iterator ati = relevant_tracks.begin(); ati != relevant_tracks.end(); ++ati) {
-               sl (**ati, sz);
-       }
-}
-
-void
-Editor::mapped_set_selected_regionview_from_click (AudioTimeAxisView& atv, uint32_t ignored, 
-                                                 AudioRegionView* basis, vector<AudioRegionView*>* all_equivs)
-{
-       AudioPlaylist* pl;
-       vector<AudioRegion*> results;
-       AudioRegionView* marv;
-       AudioDiskstream* ds;
-
-       if ((ds = atv.get_diskstream()) == 0) {
-               /* bus */
-               return;
-       }
-
-       if (&atv == &basis->get_time_axis_view()) {
-               /* looking in same track as the original */
-               return;
-       }
-
-       
-       if ((pl = ds->playlist()) != 0) {
-               pl->get_equivalent_regions (basis->region, results);
-       }
-       
-       for (vector<AudioRegion*>::iterator ir = results.begin(); ir != results.end(); ++ir) {
-               if ((marv = atv.view->find_view (**ir)) != 0) {
-                       all_equivs->push_back (marv);
-               }
-       }
-}
-
-bool
-Editor::set_selected_regionview_from_click (bool press, Selection::Operation op, bool no_track_remove)
-{
-       vector<AudioRegionView*> all_equivalent_regions;
-       bool commit = false;
-
-       if (!clicked_regionview || !clicked_audio_trackview) {
-               return false;
-       }
-
-       if (op == Selection::Toggle || op == Selection::Set) {
-               
-               mapover_audio_tracks (bind (mem_fun (*this, &Editor::mapped_set_selected_regionview_from_click), 
-                                           clicked_regionview, &all_equivalent_regions));
-               
-               
-               /* add clicked regionview since we skipped all other regions in the same track as the one it was in */
-               
-               all_equivalent_regions.push_back (clicked_regionview);
-               
-               switch (op) {
-               case Selection::Toggle:
-                       
-                       if (clicked_regionview->get_selected()) {
-                               if (press) {
-
-                                       /* whatever was clicked was selected already; do nothing here but allow
-                                          the button release to deselect it
-                                       */
-
-                                       button_release_can_deselect = true;
-
-                               } else {
-
-                                       if (button_release_can_deselect) {
-
-                                               /* just remove this one region, but only on a permitted button release */
-
-                                               selection->remove (clicked_regionview);
-                                               commit = true;
-
-                                               /* no more deselect action on button release till a new press
-                                                  finds an already selected object.
-                                               */
-
-                                               button_release_can_deselect = false;
-                                       }
-                               } 
-
-                       } else {
-
-                               if (press) {
-                                       /* add all the equivalent regions, but only on button press */
-                                       
-                                       if (!all_equivalent_regions.empty()) {
-                                               commit = true;
-                                       }
-                                       
-                                       for (vector<AudioRegionView*>::iterator i = all_equivalent_regions.begin(); i != all_equivalent_regions.end(); ++i) {
-                                               selection->add (*i);
-                                       }
-                               } 
-                       }
-                       break;
-                       
-               case Selection::Set:
-                       if (!clicked_regionview->get_selected()) {
-                               selection->set (all_equivalent_regions);
-                               commit = true;
-                       } else {
-                               /* no commit necessary: clicked on an already selected region */
-                               goto out;
-                       }
-                       break;
-
-               default:
-                       /* silly compiler */
-                       break;
-               }
-
-       } else if (op == Selection::Extend) {
-
-               list<Selectable*> results;
-               jack_nframes_t last_frame;
-               jack_nframes_t first_frame;
-
-               /* 1. find the last selected regionview in the track that was clicked in */
-
-               last_frame = 0;
-               first_frame = max_frames;
-
-               for (AudioRegionSelection::iterator x = selection->audio_regions.begin(); x != selection->audio_regions.end(); ++x) {
-                       if (&(*x)->get_time_axis_view() == &clicked_regionview->get_time_axis_view()) {
-
-                               if ((*x)->region.last_frame() > last_frame) {
-                                       last_frame = (*x)->region.last_frame();
-                               }
-
-                               if ((*x)->region.first_frame() < first_frame) {
-                                       first_frame = (*x)->region.first_frame();
-                               }
-                       }
-               }
-
-               /* 2. figure out the boundaries for our search for new objects */
-
-               switch (clicked_regionview->region.coverage (first_frame, last_frame)) {
-               case OverlapNone:
-                       cerr << "no overlap, first = " << first_frame << " last = " << last_frame << " region = " 
-                            << clicked_regionview->region.first_frame() << " .. " << clicked_regionview->region.last_frame() << endl;
-
-                       if (last_frame < clicked_regionview->region.first_frame()) {
-                               first_frame = last_frame;
-                               last_frame = clicked_regionview->region.last_frame();
-                       } else {
-                               last_frame = first_frame;
-                               first_frame = clicked_regionview->region.first_frame();
-                       }
-                       break;
-
-               case OverlapExternal:
-                       cerr << "external overlap, first = " << first_frame << " last = " << last_frame << " region = " 
-                            << clicked_regionview->region.first_frame() << " .. " << clicked_regionview->region.last_frame() << endl;
-
-                       if (last_frame < clicked_regionview->region.first_frame()) {
-                               first_frame = last_frame;
-                               last_frame = clicked_regionview->region.last_frame();
-                       } else {
-                               last_frame = first_frame;
-                               first_frame = clicked_regionview->region.first_frame();
-                       }
-                       break;
-
-               case OverlapInternal:
-                       cerr << "internal overlap, first = " << first_frame << " last = " << last_frame << " region = " 
-                            << clicked_regionview->region.first_frame() << " .. " << clicked_regionview->region.last_frame() << endl;
-
-                       if (last_frame < clicked_regionview->region.first_frame()) {
-                               first_frame = last_frame;
-                               last_frame = clicked_regionview->region.last_frame();
-                       } else {
-                               last_frame = first_frame;
-                               first_frame = clicked_regionview->region.first_frame();
-                       }
-                       break;
-
-               case OverlapStart:
-               case OverlapEnd:
-                       /* nothing to do except add clicked region to selection, since it
-                          overlaps with the existing selection in this track.
-                       */
-                       break;
-               }
-
-               /* 2. find all selectable objects (regionviews in this case) between that one and the end of the
-                     one that was clicked.
-               */
-
-               set<AudioTimeAxisView*> relevant_tracks;
-               
-               get_relevant_audio_tracks (*clicked_audio_trackview, relevant_tracks);
-               
-               for (set<AudioTimeAxisView*>::iterator t = relevant_tracks.begin(); t != relevant_tracks.end(); ++t) {
-                       (*t)->get_selectables (first_frame, last_frame, -1.0, -1.0, results);
-               }
-               
-               /* 3. convert to a vector of audio regions */
-
-               vector<AudioRegionView*> audio_regions;
-               
-               for (list<Selectable*>::iterator x = results.begin(); x != results.end(); ++x) {
-                       AudioRegionView* arv;
-
-                       if ((arv = dynamic_cast<AudioRegionView*>(*x)) != 0) {
-                               audio_regions.push_back (arv);
-                       }
-               }
-
-               if (!audio_regions.empty()) {
-                       selection->add (audio_regions);
-                       commit = true;
-               }
-       }
-
-  out:
-       return commit;
-}
-
-void
-Editor::set_selected_regionview_from_region_list (Region& r, Selection::Operation op)
-{
-       vector<AudioRegionView*> all_equivalent_regions;
-       AudioRegion* region;
-
-       if ((region = dynamic_cast<AudioRegion*>(&r)) == 0) {
-               return;
-       }
-
-       for (TrackViewList::iterator i = track_views.begin(); i != track_views.end(); ++i) {
-               
-               AudioTimeAxisView* tatv;
-               
-               if ((tatv = dynamic_cast<AudioTimeAxisView*> (*i)) != 0) {
-                       
-                       AudioPlaylist* pl;
-                       vector<AudioRegion*> results;
-                       AudioRegionView* marv;
-                       AudioDiskstream* ds;
-                       
-                       if ((ds = tatv->get_diskstream()) == 0) {
-                               /* bus */
-                               continue;
-                       }
-
-                       if ((pl = ds->playlist()) != 0) {
-                               pl->get_region_list_equivalent_regions (*region, results);
-                       }
-                       
-                       for (vector<AudioRegion*>::iterator ir = results.begin(); ir != results.end(); ++ir) {
-                               if ((marv = tatv->view->find_view (**ir)) != 0) {
-                                       all_equivalent_regions.push_back (marv);
-                               }
-                       }
-                       
-               }
-       }
-       
-       begin_reversible_command (_("set selected regions"));
-       
-       switch (op) {
-       case Selection::Toggle:
-               /* XXX this is not correct */
-               selection->toggle (all_equivalent_regions);
-               break;
-       case Selection::Set:
-               selection->set (all_equivalent_regions);
-               break;
-       case Selection::Extend:
-               selection->add (all_equivalent_regions);
-               break;
-       }
-
-       commit_reversible_command () ;
-}
-
-bool
-Editor::set_selected_regionview_from_map_event (GdkEventAny* ev, StreamView* sv, Region* r)
-{
-       AudioRegionView* rv;
-       AudioRegion* ar;
-
-       if ((ar = dynamic_cast<AudioRegion*> (r)) == 0) {
-               return TRUE;
-       }
-
-       if ((rv = sv->find_view (*ar)) == 0) {
-               return TRUE;
-       }
-
-       /* don't reset the selection if its something other than 
-          a single other region.
-       */
-
-       if (selection->audio_regions.size() > 1) {
-               return TRUE;
+               session->commit_reversible_command (new MementoCommand<Editor>(*this, before, &get_state()));
        }
-       
-       begin_reversible_command (_("set selected regions"));
-       
-       selection->set (rv);
-
-       commit_reversible_command () ;
-
-       return TRUE;
 }
 
 void
@@ -3433,89 +2804,27 @@ Editor::set_edit_group_mute (Route& route, bool yn)
 }
                
 void
-Editor::set_edit_menu (Menu& menu)
-{
-       edit_menu = &menu;
-       edit_menu->signal_map_event().connect (mem_fun(*this, &Editor::edit_menu_map_handler));
-}
-
-bool
-Editor::edit_menu_map_handler (GdkEventAny* ev)
+Editor::history_changed ()
 {
-       using namespace Menu_Helpers;
-       MenuList& edit_items = edit_menu->items();
        string label;
 
-       /* Nuke all the old items */
-               
-       edit_items.clear ();
-
-       if (session == 0) {
-               return false;
-       }
-
-       if (session->undo_depth() == 0) {
-               label = _("Undo");
-       } else {
-               label = string_compose(_("Undo (%1)"), session->next_undo());
-       }
-       
-       edit_items.push_back (MenuElem (label, bind (mem_fun(*this, &Editor::undo), 1U)));
-       
-       if (session->undo_depth() == 0) {
-               edit_items.back().set_sensitive (false);
-       }
-       
-       if (session->redo_depth() == 0) {
-               label = _("Redo");
-       } else {
-               label = string_compose(_("Redo (%1)"), session->next_redo());
-       }
-       
-       edit_items.push_back (MenuElem (label, bind (mem_fun(*this, &Editor::redo), 1U)));
-       if (session->redo_depth() == 0) {
-               edit_items.back().set_sensitive (false);
-       }
-
-       vector<MenuItem*> mitems;
-
-       edit_items.push_back (SeparatorElem());
-       edit_items.push_back (MenuElem (_("Cut"), mem_fun(*this, &Editor::cut)));
-       mitems.push_back (&edit_items.back());
-       edit_items.push_back (MenuElem (_("Copy"), mem_fun(*this, &Editor::copy)));
-       mitems.push_back (&edit_items.back());
-       edit_items.push_back (MenuElem (_("Paste"), bind (mem_fun(*this, &Editor::paste), 1.0f)));
-       mitems.push_back (&edit_items.back());
-       edit_items.push_back (SeparatorElem());
-       edit_items.push_back (MenuElem (_("Align"), bind (mem_fun(*this, &Editor::align), ARDOUR::SyncPoint)));
-       mitems.push_back (&edit_items.back());
-       edit_items.push_back (MenuElem (_("Align Relative"), bind (mem_fun(*this, &Editor::align_relative), ARDOUR::SyncPoint)));
-       mitems.push_back (&edit_items.back());
-       edit_items.push_back (SeparatorElem());
-
-       if (selection->empty()) {
-               for (vector<MenuItem*>::iterator i = mitems.begin(); i != mitems.end(); ++i) {
-                       (*i)->set_sensitive (false);
+       if (undo_action && session) {
+               if (session->undo_depth() == 0) {
+                       label = _("Undo");
+               } else {
+                       label = string_compose(_("Undo (%1)"), session->next_undo());
                }
+               undo_action->property_label() = label;
        }
 
-       Menu* import_menu = manage (new Menu());
-       import_menu->set_name ("ArdourContextMenu");
-       MenuList& import_items = import_menu->items();
-       
-       import_items.push_back (MenuElem (_("... as new track"), bind (mem_fun(*this, &Editor::add_external_audio_action), ImportAsTrack)));
-       import_items.push_back (MenuElem (_("... as new region"), bind (mem_fun(*this, &Editor::add_external_audio_action), ImportAsRegion)));
-
-       edit_items.push_back (MenuElem (_("Import audio (copy)"), *import_menu));
-       edit_items.push_back (SeparatorElem());
-
-       edit_items.push_back (MenuElem (_("Remove last capture"), mem_fun(*this, &Editor::remove_last_capture)));
-
-       if (!session->have_captured()) {
-               edit_items.back().set_sensitive (false);
+       if (redo_action && session) {
+               if (session->redo_depth() == 0) {
+                       label = _("Redo");
+               } else {
+                       label = string_compose(_("Redo (%1)"), session->next_redo());
+               }
+               redo_action->property_label() = label;
        }
-
-       return false;
 }
 
 void
@@ -3544,7 +2853,7 @@ Editor::duplicate_dialog (bool dup_region)
 
        entry.set_text ("1");
        set_size_request_to_display_given_text (entry, X_("12345678"), 20, 15);
-       entry.select_region (0, entry.get_text_length());
+       entry.select_region (0, -1);
        entry.grab_focus ();
 
 
@@ -3560,7 +2869,7 @@ Editor::duplicate_dialog (bool dup_region)
 
        if (sscanf (text.c_str(), "%f", &times) == 1) {
                if (dup_region) {
-                       AudioRegionSelection regions;
+                       RegionSelection regions;
                        regions.add (clicked_regionview);
                        duplicate_some_regions (regions, times);
                } else {
@@ -3611,36 +2920,32 @@ Editor::edit_mode_selection_done ()
        string choice = edit_mode_selector.get_active_text();
        EditMode mode = Slide;
 
-       if (choice == _("Splice")) {
+       if (choice == _("Splice Edit")) {
                mode = Splice;
-       } else if (choice == _("Slide")) {
+       } else if (choice == _("Slide Edit")) {
                mode = Slide;
        }
 
-       session->set_edit_mode (mode);
+       Config->set_edit_mode (mode);
 }      
 
 void
 Editor::snap_type_selection_done ()
 {
-       if (session == 0) {
-               return;
-       }
-
        string choice = snap_type_selector.get_active_text();
        SnapType snaptype = SnapToFrame;
-       
+
        if (choice == _("Beats/3")) {
-                snaptype = SnapToAThirdBeat;
-        } else if (choice == _("Beats/4")) {
-                snaptype = SnapToAQuarterBeat;
-        } else if (choice == _("Beats/8")) {
-                snaptype = SnapToAEighthBeat;
-        } else if (choice == _("Beats/16")) {
-                snaptype = SnapToASixteenthBeat;
-        } else if (choice == _("Beats/32")) {
-                snaptype = SnapToAThirtysecondBeat;
-        } else if (choice == _("Beats")) {
+               snaptype = SnapToAThirdBeat;
+       } else if (choice == _("Beats/4")) {
+               snaptype = SnapToAQuarterBeat;
+       } else if (choice == _("Beats/8")) {
+               snaptype = SnapToAEighthBeat;
+       } else if (choice == _("Beats/16")) {
+               snaptype = SnapToASixteenthBeat;
+       } else if (choice == _("Beats/32")) {
+               snaptype = SnapToAThirtysecondBeat;
+       } else if (choice == _("Beats")) {
                snaptype = SnapToBeat;
        } else if (choice == _("Bars")) {
                snaptype = SnapToBar;
@@ -3668,20 +2973,19 @@ Editor::snap_type_selection_done ()
                snaptype = SnapToSeconds;
        } else if (choice == _("Minutes")) {
                snaptype = SnapToMinutes;
-        } else if (choice == _("None")) {
+       } else if (choice == _("None")) {
                snaptype = SnapToFrame;
        }
-       
-       set_snap_to (snaptype);
+
+       RefPtr<RadioAction> ract = snap_type_action (snaptype);
+       if (ract) {
+               ract->set_active ();
+       }
 }      
 
 void
 Editor::snap_mode_selection_done ()
 {
-       if(session == 0) {
-               return;
-       }
-
        string choice = snap_mode_selector.get_active_text();
        SnapMode mode = SnapNormal;
 
@@ -3691,16 +2995,16 @@ Editor::snap_mode_selection_done ()
                mode = SnapMagnetic;
        }
 
-       set_snap_mode (mode);
+       RefPtr<RadioAction> ract = snap_mode_action (mode);
+
+       if (ract) {
+               ract->set_active (true);
+       }
 }
 
 void
 Editor::zoom_focus_selection_done ()
 {
-       if (session == 0) {
-               return;
-       }
-
        string choice = zoom_focus_selector.get_active_text();
        ZoomFocus focus_type = ZoomFocusLeft;
 
@@ -3710,13 +3014,17 @@ Editor::zoom_focus_selection_done ()
                focus_type = ZoomFocusRight;
        } else if (choice == _("Center")) {
                focus_type = ZoomFocusCenter;
-        } else if (choice == _("Playhead")) {
+       } else if (choice == _("Playhead")) {
                focus_type = ZoomFocusPlayhead;
-        } else if (choice == _("Edit Cursor")) {
+       } else if (choice == _("Edit Cursor")) {
                focus_type = ZoomFocusEdit;
        } 
+       
+       RefPtr<RadioAction> ract = zoom_focus_action (focus_type);
 
-       set_zoom_focus (focus_type);
+       if (ract) {
+               ract->set_active ();
+       }
 }      
 
 gint
@@ -3728,82 +3036,16 @@ Editor::edit_controls_button_release (GdkEventButton* ev)
        return TRUE;
 }
 
-void
-Editor::track_selection_changed ()
-{
-       switch (selection->tracks.size()){
-       case 0:
-               break;
-       default:
-               set_selected_mixer_strip (*(selection->tracks.front()));
-               break;
-       }
-
-       for (TrackViewList::iterator i = track_views.begin(); i != track_views.end(); ++i) {
-               (*i)->set_selected (false);
-               if (mouse_mode == MouseRange) {
-                       (*i)->hide_selection ();
-               }
-       }
-
-       for (TrackSelection::iterator i = selection->tracks.begin(); i != selection->tracks.end(); ++i) {
-               (*i)->set_selected (true);
-               if (mouse_mode == MouseRange) {
-                       (*i)->show_selection (selection->time);
-               }
-       }
-}
-
-void
-Editor::time_selection_changed ()
-{
-       for (TrackViewList::iterator i = track_views.begin(); i != track_views.end(); ++i) {
-               (*i)->hide_selection ();
-       }
-
-       if (selection->tracks.empty()) {
-               for (TrackViewList::iterator i = track_views.begin(); i != track_views.end(); ++i) {
-                       (*i)->show_selection (selection->time);
-               }
-       } else {
-               for (TrackSelection::iterator i = selection->tracks.begin(); i != selection->tracks.end(); ++i) {
-                       (*i)->show_selection (selection->time);
-               }
-       }
-
-       if (selection->time.empty()) {
-               ActionManager::set_sensitive (ActionManager::time_selection_sensitive_actions, false);
-       } else {
-               ActionManager::set_sensitive (ActionManager::time_selection_sensitive_actions, true);
-       }
-}
-
-void
-Editor::region_selection_changed ()
-{
-       for (TrackViewList::iterator i = track_views.begin(); i != track_views.end(); ++i) {
-               (*i)->set_selected_regionviews (selection->audio_regions);
-       }
-}
-
-void
-Editor::point_selection_changed ()
-{
-       for (TrackViewList::iterator i = track_views.begin(); i != track_views.end(); ++i) {
-               (*i)->set_selected_points (selection->points);
-       }
-}
-
 gint
 Editor::mouse_select_button_release (GdkEventButton* ev)
 {
        /* this handles just right-clicks */
 
        if (ev->button != 3) {
-               return FALSE;
+               return false;
        }
 
-       return TRUE;
+       return true;
 }
 
 Editor::TrackViewList *
@@ -3847,10 +3089,15 @@ Editor::get_valid_views (TimeAxisView* track, RouteGroup* group)
 void
 Editor::set_zoom_focus (ZoomFocus f)
 {
+       string str = zoom_focus_strings[(int)f];
+
+       if (str != zoom_focus_selector.get_active_text()) {
+               zoom_focus_selector.set_active_text (str);
+       }
+       
        if (zoom_focus != f) {
                zoom_focus = f;
-               vector<string> txt = internationalize (zoom_focus_strings);
-               zoom_focus_selector.set_active_text (txt[(int)f]);
+
                ZoomFocusChanged (); /* EMIT_SIGNAL */
 
                instant_save ();
@@ -3962,21 +3209,33 @@ Editor::set_follow_playhead (bool yn)
 }
 
 void
-Editor::toggle_xfade_active (Crossfade* xfade)
+Editor::toggle_xfade_active (boost::weak_ptr<Crossfade> wxfade)
 {
-       xfade->set_active (!xfade->active());
+       boost::shared_ptr<Crossfade> xfade (wxfade.lock());
+       if (xfade) {
+               xfade->set_active (!xfade->active());
+       }
 }
 
 void
-Editor::toggle_xfade_length (Crossfade* xfade)
+Editor::toggle_xfade_length (boost::weak_ptr<Crossfade> wxfade)
 {
-       xfade->set_follow_overlap (!xfade->following_overlap());
+       boost::shared_ptr<Crossfade> xfade (wxfade.lock());
+       if (xfade) {
+               xfade->set_follow_overlap (!xfade->following_overlap());
+       }
 }
 
 void
-Editor::edit_xfade (Crossfade* xfade)
+Editor::edit_xfade (boost::weak_ptr<Crossfade> wxfade)
 {
-       CrossfadeEditor cew (*session, *xfade, xfade->fade_in().get_min_y(), 1.0);
+       boost::shared_ptr<Crossfade> xfade (wxfade.lock());
+
+       if (!xfade) {
+               return;
+       }
+
+       CrossfadeEditor cew (*session, xfade, xfade->fade_in().get_min_y(), 1.0);
                
        ensure_float (cew);
        
@@ -3997,10 +3256,10 @@ Editor::playlist_selector () const
        return *_playlist_selector;
 }
 
-jack_nframes_t
-Editor::get_nudge_distance (jack_nframes_t pos, jack_nframes_t& next)
+nframes_t
+Editor::get_nudge_distance (nframes_t pos, nframes_t& next)
 {
-       jack_nframes_t ret;
+       nframes_t ret;
 
        ret = nudge_clock.current_duration (pos);
        next = ret + 1; /* XXXX fix me */
@@ -4016,17 +3275,19 @@ Editor::end_location_changed (Location* location)
 }
 
 int
-Editor::playlist_deletion_dialog (Playlist* pl)
+Editor::playlist_deletion_dialog (boost::shared_ptr<Playlist> pl)
 {
        ArdourDialog dialog ("playlist deletion dialog");
        Label  label (string_compose (_("Playlist %1 is currently unused.\n"
-                                "If left alone, no audio files used by it will be cleaned.\n"
-                                "If deleted, audio files used by it alone by will cleaned."),
-                              pl->name()));
-
+                                       "If left alone, no audio files used by it will be cleaned.\n"
+                                       "If deleted, audio files used by it alone by will cleaned."),
+                                     pl->name()));
+       
        dialog.set_position (WIN_POS_CENTER);
        dialog.get_vbox()->pack_start (label);
 
+       label.show ();
+
        dialog.add_button (_("Delete playlist"), RESPONSE_ACCEPT);
        dialog.add_button (_("Keep playlist"), RESPONSE_CANCEL);
        dialog.add_button (_("Cancel"), RESPONSE_CANCEL);
@@ -4050,10 +3311,10 @@ Editor::playlist_deletion_dialog (Playlist* pl)
 }
 
 bool
-Editor::audio_region_selection_covers (jack_nframes_t where)
+Editor::audio_region_selection_covers (nframes_t where)
 {
-       for (AudioRegionSelection::iterator a = selection->audio_regions.begin(); a != selection->audio_regions.end(); ++a) {
-               if ((*a)->region.covers (where)) {
+       for (RegionSelection::iterator a = selection->regions.begin(); a != selection->regions.end(); ++a) {
+               if ((*a)->region()->covers (where)) {
                        return true;
                }
        }
@@ -4064,10 +3325,10 @@ Editor::audio_region_selection_covers (jack_nframes_t where)
 void
 Editor::prepare_for_cleanup ()
 {
-       cut_buffer->clear_audio_regions ();
+       cut_buffer->clear_regions ();
        cut_buffer->clear_playlists ();
 
-       selection->clear_audio_regions ();
+       selection->clear_regions ();
        selection->clear_playlists ();
 }
 
@@ -4157,7 +3418,19 @@ Editor::redisplay_snapshots ()
        for (vector<string*>::iterator i = states->begin(); i != states->end(); ++i) {
                string statename = *(*i);
                TreeModel::Row row = *(snapshot_display_model->append());
-               row[snapshot_display_columns.visible_name] = statename;
+               
+               /* 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;
        }
 
@@ -4174,23 +3447,48 @@ Editor::session_state_saved (string snap_name)
 void
 Editor::maximise_editing_space ()
 {
+       initial_ruler_update_required = true;
+
        mouse_mode_tearoff->set_visible (false);
        tools_tearoff->set_visible (false);
 
        pre_maximal_pane_position = edit_pane.get_position();
-       edit_pane.set_position (edit_pane.get_width());
+       pre_maximal_editor_width = this->get_width();
+
+       if(post_maximal_pane_position == 0) {
+               post_maximal_pane_position = edit_pane.get_width();
+       }
+
 
        fullscreen();
+       if(post_maximal_editor_width) {
+               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);
+       }
 }
 
 void
 Editor::restore_editing_space ()
 {
+       initial_ruler_update_required = true;
+
+       // user changed width of pane during fullscreen
+       if(post_maximal_pane_position != edit_pane.get_position()) {
+               post_maximal_pane_position = edit_pane.get_position();
+       }
+
+       unfullscreen();
+
        mouse_mode_tearoff->set_visible (true);
        tools_tearoff->set_visible (true);
-       edit_pane.set_position (pre_maximal_pane_position);
+       post_maximal_editor_width = this->get_width();
 
-       unfullscreen();
+
+       edit_pane.set_position (
+               pre_maximal_pane_position + abs(this->get_width() - pre_maximal_editor_width)
+       );
 }
 
 void 
@@ -4242,50 +3540,169 @@ Editor::on_key_press_event (GdkEventKey* ev)
 }
 
 void
-Editor::update_layering_model ()
+Editor::reset_x_origin (nframes_t frame)
 {
-       RefPtr<Action> act;
+       queue_visual_change (frame);
+}
 
-       switch (session->get_layer_model()) {
-       case Session::LaterHigher:
-               act = ActionManager::get_action (X_("Editor"), X_("LayerLaterHigher"));
-               break;
-       case Session::MoveAddHigher:
-               act = ActionManager::get_action (X_("Editor"), X_("LayerMoveAddHigher"));
-               break;
-       case Session::AddHigher:
-               act = ActionManager::get_action (X_("Editor"), X_("LayerAddHigher"));
-               break;
+void
+Editor::reset_zoom (double fpu)
+{
+       queue_visual_change (fpu);
+}
+
+void
+Editor::reposition_and_zoom (nframes_t frame, double fpu)
+{
+       reset_x_origin (frame);
+       reset_zoom (fpu);
+}
+
+void
+Editor::set_frames_per_unit (double fpu)
+{
+       nframes_t frames;
+
+       /* this is the core function that controls the zoom level of the canvas. it is called
+          whenever one or more calls are made to reset_zoom(). it executes in an idle handler.
+       */
+
+       if (fpu == frames_per_unit) {
+               return;
        }
 
-       if (act) {
-               RefPtr<RadioAction> ract = RefPtr<RadioAction>::cast_dynamic(act);
-               if (ract && !ract->get_active()) {
-                       ract->set_active (true);
+       if (fpu < 2.0) {
+               fpu = 2.0;
+       }
+
+       // convert fpu to frame count
+
+       frames = (nframes_t) floor (fpu * canvas_width);
+       
+       /* don't allow zooms that fit more than the maximum number
+          of frames into an 800 pixel wide space.
+       */
+
+       if (max_frames / fpu < 800.0) {
+               return;
+       }
+
+       if (fpu == frames_per_unit) {
+               return;
+       }
+
+       frames_per_unit = fpu;
+
+       if (frames != zoom_range_clock.current_duration()) {
+               zoom_range_clock.set (frames);
+       }
+
+       if (mouse_mode == MouseRange && selection->time.start () != selection->time.end_frame ()) {
+               if (!selection->tracks.empty()) {
+                       for (TrackSelection::iterator i = selection->tracks.begin(); i != selection->tracks.end(); ++i) {
+                               (*i)->reshow_selection (selection->time);
+                       }
+               } else {
+                       for (TrackViewList::iterator i = track_views.begin(); i != track_views.end(); ++i) {
+                               (*i)->reshow_selection (selection->time);
+                       }
                }
        }
+
+       ZoomChanged (); /* EMIT_SIGNAL */
+
+       reset_hscrollbar_stepping ();
+       reset_scrolling_region ();
+       
+       if (edit_cursor) edit_cursor->set_position (edit_cursor->current_frame);
+       if (playhead_cursor) playhead_cursor->set_position (playhead_cursor->current_frame);
+
+       instant_save ();
 }
 
+void 
+Editor::canvas_horizontally_scrolled ()
+{
+       /* this is the core function that controls horizontal scrolling of the canvas. it is called
+          whenever the horizontal_adjustment emits its "value_changed" signal. it executes in an
+          idle handler.
+       */
+
+       leftmost_frame = (nframes_t) floor (horizontal_adjustment.get_value() * frames_per_unit);
+       nframes_t rightmost_frame = leftmost_frame + current_page_frames ();
+       
+       if (rightmost_frame > last_canvas_frame) {
+               last_canvas_frame = rightmost_frame;
+               reset_scrolling_region ();
+       }
+       
+       update_fixed_rulers ();
+       tempo_map_changed (Change (0));
+}
 
 void
-Editor::update_crossfade_model ()
+Editor::queue_visual_change (nframes_t where)
 {
-       RefPtr<Action> act;
+       pending_visual_change.pending = VisualChange::Type (pending_visual_change.pending | VisualChange::TimeOrigin);
+       pending_visual_change.time_origin = where;
 
-       switch (session->get_xfade_model()) {
-       case FullCrossfade:
-               act = ActionManager::get_action (X_("Editor"), X_("CrossfadesFull"));
-               break;
-       case ShortCrossfade:
-               act = ActionManager::get_action (X_("Editor"), X_("CrossfadesShort"));
-               break;
+       if (pending_visual_change.idle_handler_id < 0) {
+               pending_visual_change.idle_handler_id = g_idle_add (_idle_visual_changer, this);
        }
+}
 
-       if (act) {
-               RefPtr<RadioAction> ract = RefPtr<RadioAction>::cast_dynamic(act);
-               if (ract && !ract->get_active()) {
-                       ract->set_active (true);
+void
+Editor::queue_visual_change (double fpu)
+{
+       pending_visual_change.pending = VisualChange::Type (pending_visual_change.pending | VisualChange::ZoomLevel);
+       pending_visual_change.frames_per_unit = fpu;
+
+       if (pending_visual_change.idle_handler_id < 0) {
+               pending_visual_change.idle_handler_id = g_idle_add_full (G_PRIORITY_HIGH_IDLE, _idle_visual_changer, this, 0);
+       }
+}
+
+int
+Editor::_idle_visual_changer (void* arg)
+{
+       return static_cast<Editor*>(arg)->idle_visual_changer ();
+}
+
+int
+Editor::idle_visual_changer ()
+{
+       VisualChange::Type p = pending_visual_change.pending;
+
+       pending_visual_change.pending = (VisualChange::Type) 0;
+       pending_visual_change.idle_handler_id = -1;
+       
+       if (p & VisualChange::ZoomLevel) {
+               set_frames_per_unit (pending_visual_change.frames_per_unit);
+       }
+
+       if (p & VisualChange::TimeOrigin) {
+               if (pending_visual_change.time_origin != leftmost_frame) {
+                       horizontal_adjustment.set_value (pending_visual_change.time_origin/frames_per_unit);
+                       /* the signal handler will do the rest */
+               } else {
+                       update_fixed_rulers();
+                       tempo_map_changed (Change (0));
                }
        }
+
+       return 0;
+}
+
+struct EditorOrderTimeAxisSorter {
+    bool operator() (const TimeAxisView* a, const TimeAxisView* b) const {
+           return a->order < b->order;
+    }
+};
+       
+void
+Editor::sort_track_selection ()
+{
+       EditorOrderTimeAxisSorter cmp;
+       selection->tracks.sort (cmp);
 }