enough with umpteen "i18n.h" files. Consolidate on pbd/i18n.h
[ardour.git] / gtk2_ardour / mixer_ui.cc
index 67ac5d20078011f60224b8a1e80520dd3b1f6f2e..4c5317a389e3fe833691af1c0b14dd249b9489fd 100644 (file)
@@ -25,6 +25,8 @@
 #include <map>
 #include <sigc++/bind.h>
 
+#include <boost/foreach.hpp>
+
 #include <gtkmm/accelmap.h>
 
 #include "pbd/convert.h"
 
 #include "ardour/amp.h"
 #include "ardour/debug.h"
+#include "ardour/audio_track.h"
 #include "ardour/midi_track.h"
 #include "ardour/plugin_manager.h"
 #include "ardour/route_group.h"
-#include "ardour/route_sorters.h"
 #include "ardour/session.h"
 #include "ardour/vca.h"
 #include "ardour/vca_manager.h"
@@ -56,6 +58,7 @@
 #include "monitor_section.h"
 #include "plugin_selector.h"
 #include "public_editor.h"
+#include "mouse_cursors.h"
 #include "ardour_ui.h"
 #include "prompter.h"
 #include "utils.h"
 #include "actions.h"
 #include "gui_thread.h"
 #include "mixer_group_tabs.h"
+#include "route_sorter.h"
 #include "timers.h"
 #include "ui_config.h"
 #include "vca_master_strip.h"
 
-#include "i18n.h"
+#include "pbd/i18n.h"
 
 using namespace ARDOUR;
 using namespace ARDOUR_UI_UTILS;
@@ -106,13 +110,14 @@ Mixer_UI::Mixer_UI ()
        , _following_editor_selection (false)
        , _maximised (false)
        , _show_mixer_list (true)
+       , myactions (X_("mixer"))
 {
-       Route::SyncOrderKeys.connect (*this, invalidator (*this), boost::bind (&Mixer_UI::sync_treeview_from_order_keys, this), gui_context());
-
-       /* bindings was already set in MixerActor constructor */
-
+       register_actions ();
+       load_bindings ();
        _content.set_data ("ardour-bindings", bindings);
 
+       PresentationInfo::Change.connect (*this, invalidator (*this), boost::bind (&Mixer_UI::sync_treeview_from_presentation_info, this), gui_context());
+
        scroller.set_can_default (true);
        // set_default (scroller);
 
@@ -143,12 +148,13 @@ Mixer_UI::Mixer_UI ()
 
        group_model = ListStore::create (group_columns);
        group_display.set_model (group_model);
-       group_display.append_column (_("Group"), group_columns.text);
        group_display.append_column (_("Show"), group_columns.visible);
+       group_display.append_column (_("Group"), group_columns.text);
        group_display.get_column (0)->set_data (X_("colnum"), GUINT_TO_POINTER(0));
        group_display.get_column (1)->set_data (X_("colnum"), GUINT_TO_POINTER(1));
-       group_display.get_column (0)->set_expand(true);
-       group_display.get_column (1)->set_expand(false);
+       group_display.get_column (0)->set_expand(false);
+       group_display.get_column (1)->set_expand(true);
+       group_display.get_column (1)->set_sizing (Gtk::TREE_VIEW_COLUMN_FIXED);
        group_display.set_name ("EditGroupList");
        group_display.get_selection()->set_mode (Gtk::SELECTION_SINGLE);
        group_display.set_reorderable (true);
@@ -158,13 +164,13 @@ Mixer_UI::Mixer_UI ()
 
        /* name is directly editable */
 
-       CellRendererText* name_cell = dynamic_cast<CellRendererText*>(group_display.get_column_cell_renderer (0));
+       CellRendererText* name_cell = dynamic_cast<CellRendererText*>(group_display.get_column_cell_renderer (1));
        name_cell->property_editable() = true;
        name_cell->signal_edited().connect (sigc::mem_fun (*this, &Mixer_UI::route_group_name_edit));
 
        /* use checkbox for the active column */
 
-       CellRendererToggle* active_cell = dynamic_cast<CellRendererToggle*>(group_display.get_column_cell_renderer (1));
+       CellRendererToggle* active_cell = dynamic_cast<CellRendererToggle*>(group_display.get_column_cell_renderer (0));
        active_cell->property_activatable() = true;
        active_cell->property_radio() = false;
 
@@ -219,6 +225,7 @@ Mixer_UI::Mixer_UI ()
        favorite_plugins_display.set_headers_visible (true);
        favorite_plugins_display.set_rules_hint (true);
        favorite_plugins_display.set_can_focus (false);
+       favorite_plugins_display.set_tooltip_column (0);
        favorite_plugins_display.add_object_drag (favorite_plugins_columns.plugin.index(), "PluginFavoritePtr");
        favorite_plugins_display.set_drag_column (favorite_plugins_columns.name.index());
        favorite_plugins_display.add_drop_targets (target_list);
@@ -236,33 +243,82 @@ Mixer_UI::Mixer_UI ()
        favorite_plugins_frame.set_shadow_type (Gtk::SHADOW_IN);
        favorite_plugins_frame.add (favorite_plugins_scroller);
 
-       rhs_pane1.pack1 (favorite_plugins_frame, false, true);
-       rhs_pane1.pack2 (track_display_frame);
-       rhs_pane2.pack1 (rhs_pane1);
-       rhs_pane2.pack2 (group_display_frame);
+       rhs_pane1.add (favorite_plugins_frame);
+       rhs_pane1.add (track_display_frame);
+
+       rhs_pane2.add (rhs_pane1);
+       rhs_pane2.add (group_display_frame);
 
        list_vpacker.pack_start (rhs_pane2, true, true);
 
-       vca_scroller.add (vca_packer);
+       string vca_text = _("Control Masters");
+       Gtk::HBox* vca_top_padding = manage (new Gtk::HBox);
+       vca_top_padding->set_size_request (-1, 2);
+       vca_vpacker.pack_start (*vca_top_padding, false, false);
+
+       vca_label.set_text (vca_text);
+       vca_label_bar.set_size_request (-1, 16); /* must match height in GroupTabs::set_size_request() */
+
+       vca_label_bar.set_name (X_("VCALabelBar"));
+       vca_label_bar.add (vca_label);
+
+       vca_vpacker.pack_start (vca_label_bar, false, false);
+
+       vca_scroller_base.add_events (Gdk::BUTTON_PRESS_MASK|Gdk::BUTTON_RELEASE_MASK);
+       vca_scroller_base.set_name (X_("MixerWindow"));
+       vca_scroller_base.signal_button_release_event().connect (sigc::mem_fun(*this, &Mixer_UI::masters_scroller_button_release), false);
+       vca_hpacker.pack_end (vca_scroller_base, true, true);
+
+       vca_scroller.add (vca_hpacker);
        vca_scroller.set_policy (Gtk::POLICY_ALWAYS, Gtk::POLICY_AUTOMATIC);
+       vca_scroller.signal_button_release_event().connect (sigc::mem_fun(*this, &Mixer_UI::strip_scroller_button_release));
+
+       vca_vpacker.pack_start (vca_scroller, true, true);
 
-       inner_pane.pack1 (scroller);
-       inner_pane.pack2 (vca_scroller);
+       inner_pane.add (scroller);
+       inner_pane.add (vca_vpacker);
 
        global_hpacker.pack_start (inner_pane, true, true);
        global_hpacker.pack_start (out_packer, false, false);
 
-       list_hpane.pack1(list_vpacker, false, true);
-       list_hpane.pack2(global_hpacker, true, false);
+       list_hpane.set_check_divider_position (true);
+       list_hpane.add (list_vpacker);
+       list_hpane.add (global_hpacker);
 
-       rhs_pane1.signal_size_allocate().connect (sigc::bind (sigc::mem_fun(*this, &Mixer_UI::pane_allocation_handler),
-                                                       static_cast<Gtk::Paned*> (&rhs_pane1)));
-       rhs_pane2.signal_size_allocate().connect (sigc::bind (sigc::mem_fun(*this, &Mixer_UI::pane_allocation_handler),
-                                                       static_cast<Gtk::Paned*> (&rhs_pane2)));
-       list_hpane.signal_size_allocate().connect (sigc::bind (sigc::mem_fun(*this, &Mixer_UI::pane_allocation_handler),
-                                                        static_cast<Gtk::Paned*> (&list_hpane)));
-       inner_pane.signal_size_allocate().connect (sigc::bind (sigc::mem_fun(*this, &Mixer_UI::pane_allocation_handler),
-                                                        static_cast<Gtk::Paned*> (&inner_pane)));
+
+       XMLNode const * settings = ARDOUR_UI::instance()->mixer_settings();
+       XMLProperty const * prop;
+       float fract;
+
+       {
+               LocaleGuard lg;
+
+               if (!settings || ((prop = settings->property ("mixer-rhs-pane1-pos")) == 0) || ((fract = atof (prop->value())) > 1.0)) {
+                       rhs_pane1.set_divider (0, 0.6f);
+               } else {
+                       rhs_pane1.set_divider (0, fract);
+               }
+               if (!settings || ((prop = settings->property ("mixer-rhs-pane2-pos")) == 0) || ((fract = atof (prop->value())) > 1.0)) {
+                       rhs_pane2.set_divider (0, 0.7f);
+               } else {
+                       rhs_pane2.set_divider (0, fract);
+               }
+               if (!settings || ((prop = settings->property ("mixer-list-hpane-pos")) == 0) || ((fract = atof (prop->value())) > 1.0)) {
+                       list_hpane.set_divider (0, 0.2f);
+               } else {
+                       list_hpane.set_divider (0, fract);
+               }
+               if (!settings || ((prop = settings->property ("mixer-inner-pane-pos")) == 0)  || ((fract = atof (prop->value())) > 1.0)) {
+                       inner_pane.set_divider (0, 0.8f);
+               } else {
+                       inner_pane.set_divider (0, atof (prop->value()));
+               }
+       }
+
+       rhs_pane1.set_drag_cursor (*PublicEditor::instance().cursors()->expand_up_down);
+       rhs_pane2.set_drag_cursor (*PublicEditor::instance().cursors()->expand_up_down);
+       list_hpane.set_drag_cursor (*PublicEditor::instance().cursors()->expand_left_right);
+       inner_pane.set_drag_cursor (*PublicEditor::instance().cursors()->expand_left_right);
 
        _content.pack_start (list_hpane, true, true);
 
@@ -291,9 +347,14 @@ Mixer_UI::Mixer_UI ()
        rhs_pane1.show();
        rhs_pane2.show();
        strip_packer.show();
-       inner_pane.show ();
+       inner_pane.show();
+       vca_top_padding->show ();
        vca_scroller.show();
-       vca_packer.show();
+       vca_vpacker.show();
+       vca_hpacker.show();
+       vca_label_bar.show();
+       vca_label.show();
+       vca_scroller_base.show();
        out_packer.show();
        list_hpane.show();
        group_display.show();
@@ -301,6 +362,10 @@ Mixer_UI::Mixer_UI ()
 
        MixerStrip::CatchDeletion.connect (*this, invalidator (*this), boost::bind (&Mixer_UI::remove_strip, this, _1), gui_context());
 
+       /* handle escape */
+
+       ARDOUR_UI::instance()->Escape.connect (*this, invalidator (*this), boost::bind (&Mixer_UI::escape, this), gui_context());
+
 #ifndef DEFER_PLUGIN_SELECTOR_LOAD
        _plugin_selector = new PluginSelector (PluginManager::instance ());
 #else
@@ -320,6 +385,12 @@ Mixer_UI::~Mixer_UI ()
        delete _plugin_selector;
 }
 
+void
+Mixer_UI::escape ()
+{
+       select_none ();
+}
+
 void
 Mixer_UI::track_editor_selection ()
 {
@@ -355,13 +426,13 @@ Mixer_UI::show_window ()
        parameter_changed ("show-group-tabs");
 
        /* now reset each strips width so the right widgets are shown */
-       MixerStrip* ms;
 
        TreeModel::Children rows = track_model->children();
        TreeModel::Children::iterator ri;
 
        for (ri = rows.begin(); ri != rows.end(); ++ri) {
-               ms = (*ri)[track_columns.strip];
+               AxisView* av = (*ri)[stripable_columns.strip];
+               MixerStrip* ms = dynamic_cast<MixerStrip*> (av);
                if (!ms) {
                        continue;
                }
@@ -375,127 +446,193 @@ Mixer_UI::show_window ()
 }
 
 void
-Mixer_UI::add_masters (VCAList& vcas)
+Mixer_UI::remove_master (VCAMasterStrip* vms)
 {
-       for (VCAList::iterator v = vcas.begin(); v != vcas.end(); ++v) {
+       if (_session && _session->deletion_in_progress()) {
+               /* its all being taken care of */
+               return;
+       }
+
+       TreeModel::Children rows = track_model->children();
+       TreeModel::Children::iterator ri;
+
+       for (ri = rows.begin(); ri != rows.end(); ++ri) {
+               if ((*ri)[stripable_columns.strip] == vms) {
+                        PBD::Unwinder<bool> uw (_route_deletion_in_progress, true);
+                       track_model->erase (ri);
+                       break;
+               }
+       }
+}
 
-               VCAMasterStrip* vms = new VCAMasterStrip (_session, *v);
+bool
+Mixer_UI::masters_scroller_button_release (GdkEventButton* ev)
+{
+       using namespace Menu_Helpers;
 
-               TreeModel::Row row = *(track_model->append());
-               row[track_columns.text] = (*v)->name();
-               row[track_columns.visible] = true;
-               row[track_columns.vca] = vms;
+       if (Keyboard::is_context_menu_event (ev)) {
+               ARDOUR_UI::instance()->add_route ();
+               return true;
        }
 
-       redisplay_track_list ();
+       return false;
 }
 
 void
-Mixer_UI::remove_master (VCAMasterStrip* vms)
+Mixer_UI::add_masters (VCAList& vlist)
 {
+       StripableList sl;
+
+       for (VCAList::iterator v = vlist.begin(); v != vlist.end(); ++v) {
+               sl.push_back (boost::dynamic_pointer_cast<Stripable> (*v));
+       }
+
+       add_stripables (sl);
 }
 
 void
-Mixer_UI::add_strips (RouteList& routes)
+Mixer_UI::add_routes (RouteList& rlist)
+{
+       StripableList sl;
+
+       for (RouteList::iterator r = rlist.begin(); r != rlist.end(); ++r) {
+               sl.push_back (*r);
+       }
+
+       add_stripables (sl);
+}
+
+void
+Mixer_UI::add_stripables (StripableList& slist)
 {
        Gtk::TreeModel::Children::iterator insert_iter = track_model->children().end();
+       bool from_scratch = (track_model->children().size() == 0);
        uint32_t nroutes = 0;
 
+       slist.sort (StripablePresentationInfoSorter());
+
        for (Gtk::TreeModel::Children::iterator it = track_model->children().begin(); it != track_model->children().end(); ++it) {
-               boost::shared_ptr<Route> r = (*it)[track_columns.route];
+               boost::shared_ptr<Stripable> s = (*it)[stripable_columns.stripable];
 
-               if (!r) {
+               if (!s) {
                        continue;
                }
 
                nroutes++;
 
-               if (r->order_key() == (routes.front()->order_key() + routes.size())) {
+               if (s->presentation_info().order() == (slist.front()->presentation_info().order() + slist.size())) {
                        insert_iter = it;
                        break;
                }
        }
 
-       if (nroutes) {
-               _selection.clear_routes ();
-       }
-
        MixerStrip* strip;
 
+
        try {
-               no_track_list_redisplay = true;
+               PBD::Unwinder<bool> uw (no_track_list_redisplay, true);
+
                track_display.set_model (Glib::RefPtr<ListStore>());
 
-               for (RouteList::iterator x = routes.begin(); x != routes.end(); ++x) {
-                       boost::shared_ptr<Route> route = (*x);
+               for (StripableList::iterator s = slist.begin(); s != slist.end(); ++s) {
 
-                       if (route->is_auditioner()) {
-                               continue;
-                       }
+                       boost::shared_ptr<Route> route;
+                       boost::shared_ptr<VCA> vca;
 
-                       if (route->is_monitor()) {
+                       if ((vca  = boost::dynamic_pointer_cast<VCA> (*s))) {
 
-                               if (!_monitor_section) {
-                                       _monitor_section = new MonitorSection (_session);
+                               VCAMasterStrip* vms = new VCAMasterStrip (_session, vca);
 
-                                       XMLNode* mnode = ARDOUR_UI::instance()->tearoff_settings (X_("monitor-section"));
-                                       if (mnode) {
-                                               _monitor_section->tearoff().set_state (*mnode);
-                                       }
+                               TreeModel::Row row = *(track_model->append());
+
+                               row[stripable_columns.text] = vca->name();
+                               row[stripable_columns.visible] = vms->marked_for_display ();
+                               row[stripable_columns.strip] = vms;
+                               row[stripable_columns.stripable] = vca;
+
+                               vms->CatchDeletion.connect (*this, invalidator (*this), boost::bind (&Mixer_UI::remove_master, this, _1), gui_context());
+
+                       } else if ((route = boost::dynamic_pointer_cast<Route> (*s))) {
+
+                               if (route->is_auditioner()) {
+                                       continue;
                                }
 
-                               out_packer.pack_end (_monitor_section->tearoff(), false, false);
-                               _monitor_section->set_session (_session);
-                               _monitor_section->tearoff().show_all ();
+                               if (route->is_monitor()) {
 
-                               _monitor_section->tearoff().Detach.connect (sigc::mem_fun(*this, &Mixer_UI::monitor_section_detached));
-                               _monitor_section->tearoff().Attach.connect (sigc::mem_fun(*this, &Mixer_UI::monitor_section_attached));
+                                       if (!_monitor_section) {
+                                               _monitor_section = new MonitorSection (_session);
 
-                               monitor_section_attached ();
+                                               XMLNode* mnode = ARDOUR_UI::instance()->tearoff_settings (X_("monitor-section"));
+                                               if (mnode) {
+                                                       _monitor_section->tearoff().set_state (*mnode);
+                                               }
+                                       }
 
-                               route->DropReferences.connect (*this, invalidator(*this), boost::bind (&Mixer_UI::monitor_section_going_away, this), gui_context());
+                                       out_packer.pack_end (_monitor_section->tearoff(), false, false);
+                                       _monitor_section->set_session (_session);
+                                       _monitor_section->tearoff().show_all ();
 
-                               /* no regular strip shown for control out */
+                                       _monitor_section->tearoff().Detach.connect (sigc::mem_fun(*this, &Mixer_UI::monitor_section_detached));
+                                       _monitor_section->tearoff().Attach.connect (sigc::mem_fun(*this, &Mixer_UI::monitor_section_attached));
 
-                               continue;
-                       }
+                                       monitor_section_attached ();
 
-                       strip = new MixerStrip (*this, _session, route);
-                       strips.push_back (strip);
+                                       route->DropReferences.connect (*this, invalidator(*this), boost::bind (&Mixer_UI::monitor_section_going_away, this), gui_context());
 
-                       UIConfiguration::instance().get_default_narrow_ms() ? _strip_width = Narrow : _strip_width = Wide;
+                                       /* no regular strip shown for control out */
 
-                       if (strip->width_owner() != strip) {
-                               strip->set_width_enum (_strip_width, this);
-                       }
+                                       continue;
+                               }
 
-                       show_strip (strip);
+                               strip = new MixerStrip (*this, _session, route);
+                               strips.push_back (strip);
 
-                       TreeModel::Row row = *(track_model->insert(insert_iter));
-                       row[track_columns.text] = route->name();
-                       row[track_columns.visible] = strip->route()->is_master() ? true : strip->marked_for_display();
-                       row[track_columns.route] = route;
-                       row[track_columns.strip] = strip;
-                       row[track_columns.vca] = 0;
+                               UIConfiguration::instance().get_default_narrow_ms() ? _strip_width = Narrow : _strip_width = Wide;
 
-                       if (nroutes != 0) {
-                               _selection.add (strip);
-                       }
+                               if (strip->width_owner() != strip) {
+                                       strip->set_width_enum (_strip_width, this);
+                               }
 
-                       route->PropertyChanged.connect (*this, invalidator (*this), boost::bind (&Mixer_UI::strip_property_changed, this, _1, strip), gui_context());
+                               show_strip (strip);
 
-                       strip->WidthChanged.connect (sigc::mem_fun(*this, &Mixer_UI::strip_width_changed));
-                       strip->signal_button_release_event().connect (sigc::bind (sigc::mem_fun(*this, &Mixer_UI::strip_button_release_event), strip));
-               }
+                               if (!route->is_master()) {
+
+                                       TreeModel::Row row = *(track_model->insert (insert_iter));
+
+                                       row[stripable_columns.text] = route->name();
+                                       row[stripable_columns.visible] = strip->marked_for_display();
+                                       row[stripable_columns.stripable] = route;
+                                       row[stripable_columns.strip] = strip;
+
+                                       if (nroutes != 0) {
+                                               _selection.add (strip);
+                                       }
+
+                               } else {
+
+                                       out_packer.pack_start (*strip, false, false);
+                                       strip->set_packed (true);
+                               }
+
+                               strip->WidthChanged.connect (sigc::mem_fun(*this, &Mixer_UI::strip_width_changed));
+                               strip->signal_button_release_event().connect (sigc::bind (sigc::mem_fun(*this, &Mixer_UI::strip_button_release_event), strip));
+                       }
+
+                       (*s)->presentation_info().PropertyChanged.connect (*this, invalidator(*this), boost::bind (&Mixer_UI::stripable_property_changed, this, _1, boost::weak_ptr<Stripable>(*s)), gui_context());
+                       (*s)->PropertyChanged.connect (*this, invalidator(*this), boost::bind (&Mixer_UI::stripable_property_changed, this, _1, boost::weak_ptr<Stripable>(*s)), gui_context());
+                                               }
 
        } catch (const std::exception& e) {
                error << string_compose (_("Error adding GUI elements for new tracks/busses %1"), e.what()) << endmsg;
        }
 
-       no_track_list_redisplay = false;
        track_display.set_model (track_model);
 
-       sync_order_keys_from_treeview ();
+       if (!from_scratch) {
+               sync_presentation_info_from_treeview ();
+       }
+
        redisplay_track_list ();
 }
 
@@ -550,7 +687,7 @@ Mixer_UI::remove_strip (MixerStrip* strip)
        }
 
        for (ri = rows.begin(); ri != rows.end(); ++ri) {
-               if ((*ri)[track_columns.strip] == strip) {
+               if ((*ri)[stripable_columns.strip] == strip) {
                         PBD::Unwinder<bool> uw (_route_deletion_in_progress, true);
                        track_model->erase (ri);
                        break;
@@ -559,67 +696,7 @@ Mixer_UI::remove_strip (MixerStrip* strip)
 }
 
 void
-Mixer_UI::reset_remote_control_ids ()
-{
-       if (Config->get_remote_model() == UserOrdered || !_session || _session->deletion_in_progress()) {
-               return;
-       }
-
-       TreeModel::Children rows = track_model->children();
-
-       if (rows.empty()) {
-               return;
-       }
-
-       DEBUG_TRACE (DEBUG::OrderKeys, "mixer resets remote control ids after remote model change\n");
-
-       TreeModel::Children::iterator ri;
-       bool rid_change = false;
-       uint32_t rid = 1;
-       uint32_t invisible_key = UINT32_MAX;
-
-       for (ri = rows.begin(); ri != rows.end(); ++ri) {
-
-               /* skip two special values */
-
-               if (rid == Route::MasterBusRemoteControlID) {
-                       rid++;
-               }
-
-               if (rid == Route::MonitorBusRemoteControlID) {
-                       rid++;
-               }
-
-               boost::shared_ptr<Route> route = (*ri)[track_columns.route];
-               bool visible = (*ri)[track_columns.visible];
-
-               if (!route) {
-                       continue;
-               }
-
-               if (!route->is_master() && !route->is_monitor()) {
-
-                       uint32_t new_rid = (visible ? rid : invisible_key--);
-
-                       if (new_rid != route->remote_control_id()) {
-                               route->set_remote_control_id_explicit (new_rid);
-                               rid_change = true;
-                       }
-
-                       if (visible) {
-                               rid++;
-                       }
-               }
-       }
-
-       if (rid_change) {
-               /* tell the world that we changed the remote control IDs */
-               _session->notify_remote_id_change ();
-       }
-}
-
-void
-Mixer_UI::sync_order_keys_from_treeview ()
+Mixer_UI::sync_presentation_info_from_treeview ()
 {
        if (ignore_reorder || !_session || _session->deletion_in_progress()) {
                return;
@@ -631,67 +708,56 @@ Mixer_UI::sync_order_keys_from_treeview ()
                return;
        }
 
-       DEBUG_TRACE (DEBUG::OrderKeys, "mixer sync order keys from model\n");
+       DEBUG_TRACE (DEBUG::OrderKeys, "mixer sync presentation info from treeview\n");
 
        TreeModel::Children::iterator ri;
-       bool changed = false;
-       bool rid_change = false;
+       bool change = false;
        uint32_t order = 0;
-       uint32_t rid = 1;
-       uint32_t invisible_key = UINT32_MAX;
 
        for (ri = rows.begin(); ri != rows.end(); ++ri) {
-               boost::shared_ptr<Route> route = (*ri)[track_columns.route];
-               bool visible = (*ri)[track_columns.visible];
+               bool visible = (*ri)[stripable_columns.visible];
+               boost::shared_ptr<Stripable> stripable = (*ri)[stripable_columns.stripable];
 
-               if (!route) {
+               if (!stripable) {
                        continue;
                }
 
-               uint32_t old_key = route->order_key ();
+               /* Monitor and Auditioner do not get their presentation
+                * info reset here.
+                */
 
-               if (order != old_key) {
-                       route->set_order_key (order);
-                       changed = true;
+               if (stripable->is_monitor() || stripable->is_auditioner()) {
+                       continue;
                }
 
-               if ((Config->get_remote_model() == MixerOrdered) && !route->is_master() && !route->is_monitor()) {
-
-                       uint32_t new_rid = (visible ? rid : invisible_key--);
-
-                       if (new_rid != route->remote_control_id()) {
-                               route->set_remote_control_id_explicit (new_rid);
-                               rid_change = true;
-                       }
+               /* Master also doesn't get set here but since the editor allows
+                * it to be reordered, we need to preserve its ordering.
+                */
 
-                       if (visible) {
-                               rid++;
-                       }
+               stripable->presentation_info().set_hidden (!visible);
 
+               if (order != stripable->presentation_info().order()) {
+                       stripable->set_presentation_order (order, false);
+                       change = true;
                }
 
                ++order;
        }
 
-       if (changed) {
-               /* tell everyone that we changed the mixer sort keys */
-               _session->sync_order_keys ();
-       }
-
-       if (rid_change) {
-               /* tell the world that we changed the remote control IDs */
-               _session->notify_remote_id_change ();
+       if (change) {
+               DEBUG_TRACE (DEBUG::OrderKeys, "... notify PI change from mixer GUI\n");
+               _session->notify_presentation_info_change ();
        }
 }
 
 void
-Mixer_UI::sync_treeview_from_order_keys ()
+Mixer_UI::sync_treeview_from_presentation_info ()
 {
        if (!_session || _session->deletion_in_progress()) {
                return;
        }
 
-       DEBUG_TRACE (DEBUG::OrderKeys, "mixer sync model from order keys.\n");
+       DEBUG_TRACE (DEBUG::OrderKeys, "mixer sync model from presentation info.\n");
 
        /* we could get here after either a change in the Mixer or Editor sort
         * order, but either way, the mixer order keys reflect the intended
@@ -708,32 +774,10 @@ Mixer_UI::sync_treeview_from_order_keys ()
        }
 
        OrderingKeys sorted;
-       uint32_t vca_cnt = 0;
-       uint32_t max_route_order_key = 0;
-
-       /* count number of Routes in track_model (there may be some odd reason
-          why this is not the same as the number in the session, but here we
-          care about the track model.
-       */
-
-       for (TreeModel::Children::iterator ri = rows.begin(); ri != rows.end(); ++ri) {
-               boost::shared_ptr<Route> route = (*ri)[track_columns.route];
-               if (route) {
-                       max_route_order_key = max (route->order_key(), max_route_order_key);
-               }
-       }
 
        for (TreeModel::Children::iterator ri = rows.begin(); ri != rows.end(); ++ri, ++old_order) {
-               boost::shared_ptr<Route> route = (*ri)[track_columns.route];
-               if (!route) {
-                       /* VCAs need to sort after all routes. We don't display
-                        * them in the same place (March 2016), but we don't
-                        * want them intermixed in the track_model
-                        */
-                       sorted.push_back (OrderKeys (old_order, max_route_order_key + ++vca_cnt));
-               } else {
-                       sorted.push_back (OrderKeys (old_order, route->order_key ()));
-               }
+               boost::shared_ptr<Stripable> stripable = (*ri)[stripable_columns.stripable];
+               sorted.push_back (OrderKeys (old_order, stripable->presentation_info().order()));
        }
 
        SortByNewDisplayOrder cmp;
@@ -750,9 +794,6 @@ Mixer_UI::sync_treeview_from_order_keys ()
                if (sr->old_display_order != n) {
                        changed = true;
                }
-
-               DEBUG_TRACE (DEBUG::OrderKeys, string_compose ("MIXER change order from %1 to %2\n",
-                                                              sr->old_display_order, n));
        }
 
        if (changed) {
@@ -778,11 +819,11 @@ Mixer_UI::follow_editor_selection ()
        _selection.clear_routes ();
 
        for (TrackViewList::iterator i = s.begin(); i != s.end(); ++i) {
-               RouteTimeAxisView* rtav = dynamic_cast<RouteTimeAxisView*> (*i);
-               if (rtav) {
-                       MixerStrip* ms = strip_by_route (rtav->route());
-                       if (ms) {
-                               _selection.add (ms);
+               TimeAxisView* tav = dynamic_cast<TimeAxisView*> (*i);
+               if (tav) {
+                       AxisView* axis = axis_by_stripable (tav->stripable());
+                       if (axis) {
+                               _selection.add (axis);
                        }
                }
        }
@@ -793,9 +834,9 @@ Mixer_UI::follow_editor_selection ()
 
 
 MixerStrip*
-Mixer_UI::strip_by_route (boost::shared_ptr<Route> r)
+Mixer_UI::strip_by_route (boost::shared_ptr<Route> r) const
 {
-       for (list<MixerStrip *>::iterator i = strips.begin(); i != strips.end(); ++i) {
+       for (list<MixerStrip *>::const_iterator i = strips.begin(); i != strips.end(); ++i) {
                if ((*i)->route() == r) {
                        return (*i);
                }
@@ -804,6 +845,18 @@ Mixer_UI::strip_by_route (boost::shared_ptr<Route> r)
        return 0;
 }
 
+AxisView*
+Mixer_UI::axis_by_stripable (boost::shared_ptr<Stripable> s) const
+{
+       for (list<MixerStrip *>::const_iterator i = strips.begin(); i != strips.end(); ++i) {
+               if ((*i)->stripable() == s) {
+                       return (*i);
+               }
+       }
+
+       return 0;
+}
+
 bool
 Mixer_UI::strip_button_release_event (GdkEventButton *ev, MixerStrip *strip)
 {
@@ -812,7 +865,7 @@ Mixer_UI::strip_button_release_event (GdkEventButton *ev, MixerStrip *strip)
                        /* primary-click: toggle selection state of strip */
                        if (Keyboard::modifier_state_equals (ev->state, Keyboard::PrimaryModifier)) {
                                _selection.remove (strip);
-                       } else if (_selection.routes.size() > 1) {
+                       } else if (_selection.axes.size() > 1) {
                                /* de-select others */
                                _selection.set (strip);
                        }
@@ -821,53 +874,49 @@ Mixer_UI::strip_button_release_event (GdkEventButton *ev, MixerStrip *strip)
                                _selection.add (strip);
                        } else if (Keyboard::modifier_state_equals (ev->state, Keyboard::RangeSelectModifier)) {
 
-                               if (!_selection.selected(strip)) {
-
-                                       /* extend selection */
-
-                                       vector<MixerStrip*> tmp;
-                                       bool accumulate = false;
-                                       bool found_another = false;
-
-                                       tmp.push_back (strip);
-
-                                       for (list<MixerStrip*>::iterator i = strips.begin(); i != strips.end(); ++i) {
-                                               if ((*i) == strip) {
-                                                       /* hit clicked strip, start accumulating till we hit the first
-                                                          selected strip
-                                                       */
-                                                       if (accumulate) {
-                                                               /* done */
-                                                               break;
-                                                       } else {
-                                                               accumulate = true;
-                                                       }
-                                               } else if (_selection.selected (*i)) {
-                                                       /* hit selected strip. if currently accumulating others,
-                                                          we're done. if not accumulating others, start doing so.
-                                                       */
-                                                       found_another = true;
-                                                       if (accumulate) {
-                                                               /* done */
-                                                               break;
-                                                       } else {
-                                                               accumulate = true;
-                                                       }
+                               /* extend selection */
+
+                               vector<MixerStrip*> tmp;
+                               bool accumulate = false;
+                               bool found_another = false;
+
+                               tmp.push_back (strip);
+
+                               for (list<MixerStrip*>::iterator i = strips.begin(); i != strips.end(); ++i) {
+                                       if ((*i) == strip) {
+                                               /* hit clicked strip, start accumulating till we hit the first
+                                                  selected strip
+                                               */
+                                               if (accumulate) {
+                                                       /* done */
+                                                       break;
                                                } else {
-                                                       if (accumulate) {
-                                                               tmp.push_back (*i);
-                                                       }
+                                                       accumulate = true;
                                                }
-                                       }
-
-                                       if (found_another) {
-                                               for (vector<MixerStrip*>::iterator i = tmp.begin(); i != tmp.end(); ++i) {
-                                                       _selection.add (*i);
+                                       } else if (_selection.selected (*i)) {
+                                               /* hit selected strip. if currently accumulating others,
+                                                  we're done. if not accumulating others, start doing so.
+                                               */
+                                               found_another = true;
+                                               if (accumulate) {
+                                                       /* done */
+                                                       break;
+                                               } else {
+                                                       accumulate = true;
                                                }
-                                       } else
-                                               _selection.set (strip);  //user wants to start a range selection, but there aren't any others selected yet
+                                       } else {
+                                               if (accumulate) {
+                                                       tmp.push_back (*i);
+                                               }
+                                       }
                                }
 
+                               if (found_another) {
+                                       for (vector<MixerStrip*>::iterator i = tmp.begin(); i != tmp.end(); ++i) {
+                                               _selection.add (*i);
+                                       }
+                               } else
+                                       _selection.set (strip);  //user wants to start a range selection, but there aren't any others selected yet
                        } else {
                                _selection.set (strip);
                        }
@@ -901,7 +950,7 @@ Mixer_UI::set_session (Session* sess)
 
        initial_track_display ();
 
-       _session->RouteAdded.connect (_session_connections, invalidator (*this), boost::bind (&Mixer_UI::add_strips, this, _1), gui_context());
+       _session->RouteAdded.connect (_session_connections, invalidator (*this), boost::bind (&Mixer_UI::add_routes, this, _1), gui_context());
        _session->route_group_added.connect (_session_connections, invalidator (*this), boost::bind (&Mixer_UI::add_route_group, this, _1), gui_context());
        _session->route_group_removed.connect (_session_connections, invalidator (*this), boost::bind (&Mixer_UI::route_groups_changed, this), gui_context());
        _session->route_groups_reordered.connect (_session_connections, invalidator (*this), boost::bind (&Mixer_UI::route_groups_changed, this), gui_context());
@@ -963,13 +1012,12 @@ Mixer_UI::track_visibility_changed (std::string const & path)
        TreeIter iter;
 
        if ((iter = track_model->get_iter (path))) {
-               MixerStrip* strip = (*iter)[track_columns.strip];
-               if (strip) {
-                       bool visible = (*iter)[track_columns.visible];
 
-                       if (strip->set_marked_for_display (!visible)) {
-                               update_track_visibility ();
-                       }
+               AxisView* av = (*iter)[stripable_columns.strip];
+               bool visible = (*iter)[stripable_columns.visible];
+
+               if (av->set_marked_for_display (!visible)) {
+                       update_track_visibility ();
                }
        }
 }
@@ -984,16 +1032,14 @@ Mixer_UI::update_track_visibility ()
                Unwinder<bool> uw (no_track_list_redisplay, true);
 
                for (i = rows.begin(); i != rows.end(); ++i) {
-                       MixerStrip *strip = (*i)[track_columns.strip];
-                       if (strip) {
-                               (*i)[track_columns.visible] = strip->marked_for_display ();
-                       }
+                       AxisView* av = (*i)[stripable_columns.strip];
+                       (*i)[stripable_columns.visible] = av->marked_for_display ();
                }
 
-               /* force route order keys catch up with visibility changes
+               /* force presentation catch up with visibility changes
                 */
 
-               sync_order_keys_from_treeview ();
+               sync_presentation_info_from_treeview ();
        }
 
        redisplay_track_list ();
@@ -1007,10 +1053,12 @@ Mixer_UI::show_strip (MixerStrip* ms)
 
        for (i = rows.begin(); i != rows.end(); ++i) {
 
-               MixerStrip* strip = (*i)[track_columns.strip];
+               AxisView* av = (*i)[stripable_columns.strip];
+               MixerStrip* strip = dynamic_cast<MixerStrip*> (av);
                if (strip == ms) {
-                       (*i)[track_columns.visible] = true;
-                       redisplay_track_list ();
+                       (*i)[stripable_columns.visible] = true;
+                       av->set_marked_for_display (true);
+                       update_track_visibility ();
                        break;
                }
        }
@@ -1024,10 +1072,12 @@ Mixer_UI::hide_strip (MixerStrip* ms)
 
        for (i = rows.begin(); i != rows.end(); ++i) {
 
-               MixerStrip* strip = (*i)[track_columns.strip];
+               AxisView* av = (*i)[stripable_columns.strip];
+               MixerStrip* strip = dynamic_cast<MixerStrip*> (av);
                if (strip == ms) {
-                       (*i)[track_columns.visible] = false;
-                       redisplay_track_list ();
+                       (*i)[stripable_columns.visible] = false;
+                       av->set_marked_for_display (false);
+                       update_track_visibility ();
                        break;
                }
        }
@@ -1068,8 +1118,8 @@ Mixer_UI::set_all_strips_visibility (bool yn)
 
                for (i = rows.begin(); i != rows.end(); ++i) {
 
-                       TreeModel::Row row = (*i);
-                       MixerStrip* strip = row[track_columns.strip];
+                       AxisView* av = (*i)[stripable_columns.strip];
+                       MixerStrip* strip = dynamic_cast<MixerStrip*> (av);
 
                        if (!strip) {
                                continue;
@@ -1079,7 +1129,7 @@ Mixer_UI::set_all_strips_visibility (bool yn)
                                continue;
                        }
 
-                       (*i)[track_columns.visible] = yn;
+                       (*i)[stripable_columns.visible] = yn;
                }
        }
 
@@ -1097,8 +1147,9 @@ Mixer_UI::set_all_audio_midi_visibility (int tracks, bool yn)
                Unwinder<bool> uw (no_track_list_redisplay, true);
 
                for (i = rows.begin(); i != rows.end(); ++i) {
-                       TreeModel::Row row = (*i);
-                       MixerStrip* strip = row[track_columns.strip];
+
+                       AxisView* av = (*i)[stripable_columns.strip];
+                       MixerStrip* strip = dynamic_cast<MixerStrip*> (av);
 
                        if (!strip) {
                                continue;
@@ -1113,24 +1164,24 @@ Mixer_UI::set_all_audio_midi_visibility (int tracks, bool yn)
 
                        switch (tracks) {
                        case 0:
-                               (*i)[track_columns.visible] = yn;
+                               (*i)[stripable_columns.visible] = yn;
                                break;
 
                        case 1:
                                if (at) { /* track */
-                                       (*i)[track_columns.visible] = yn;
+                                       (*i)[stripable_columns.visible] = yn;
                                }
                                break;
 
                        case 2:
                                if (!at && !mt) { /* bus */
-                                       (*i)[track_columns.visible] = yn;
+                                       (*i)[stripable_columns.visible] = yn;
                                }
                                break;
 
                        case 3:
                                if (mt) { /* midi-track */
-                                       (*i)[track_columns.visible] = yn;
+                                       (*i)[stripable_columns.visible] = yn;
                                }
                                break;
                        }
@@ -1185,12 +1236,11 @@ Mixer_UI::hide_all_miditracks ()
        set_all_audio_midi_visibility (3, false);
 }
 
-
 void
 Mixer_UI::track_list_reorder (const TreeModel::Path&, const TreeModel::iterator&, int* /*new_order*/)
 {
        DEBUG_TRACE (DEBUG::OrderKeys, "mixer UI treeview reordered\n");
-       sync_order_keys_from_treeview ();
+       sync_presentation_info_from_treeview ();
 }
 
 void
@@ -1204,7 +1254,7 @@ Mixer_UI::track_list_delete (const Gtk::TreeModel::Path&)
        */
 
        DEBUG_TRACE (DEBUG::OrderKeys, "mixer UI treeview row deleted\n");
-       sync_order_keys_from_treeview ();
+       sync_presentation_info_from_treeview ();
 
         if (_route_deletion_in_progress) {
                 redisplay_track_list ();
@@ -1212,63 +1262,109 @@ Mixer_UI::track_list_delete (const Gtk::TreeModel::Path&)
 }
 
 void
-Mixer_UI::redisplay_track_list ()
+Mixer_UI::spill_redisplay (boost::shared_ptr<VCA> vca)
 {
        TreeModel::Children rows = track_model->children();
-       TreeModel::Children::iterator i;
 
+       for (TreeModel::Children::iterator i = rows.begin(); i != rows.end(); ++i) {
+
+               AxisView* av = (*i)[stripable_columns.strip];
+               MixerStrip* strip = dynamic_cast<MixerStrip*> (av);
+
+               if (!strip) {
+                       /* we're in the middle of changing a row, don't worry */
+                       continue;
+               }
+
+               if (!strip->route()) {
+                       /* non-route element */
+                       continue;
+               }
+
+               if (strip->route()->is_master() || strip->route()->is_monitor()) {
+                       continue;
+               }
+
+               if (strip->route()->slaved_to (vca)) {
+
+                       if (strip->packed()) {
+                               strip_packer.reorder_child (*strip, -1); /* put at end */
+                       } else {
+                               strip_packer.pack_start (*strip, false, false);
+                               strip->set_packed (true);
+                       }
+
+               } else {
+
+                       if (strip->packed()) {
+                               strip_packer.remove (*strip);
+                               strip->set_packed (false);
+                       }
+               }
+       }
+}
+
+void
+Mixer_UI::redisplay_track_list ()
+{
        if (no_track_list_redisplay) {
                return;
        }
 
-       container_clear (vca_packer);
+       boost::shared_ptr<VCA> sv = spilled_vca.lock ();
+
+       if (sv) {
+               spill_redisplay (sv);
+               return;
+       }
+
+       TreeModel::Children rows = track_model->children();
+       TreeModel::Children::iterator i;
+       uint32_t n_masters = 0;
+
+       container_clear (vca_hpacker);
+       vca_hpacker.pack_end (vca_scroller_base, true, true);
 
        for (i = rows.begin(); i != rows.end(); ++i) {
 
-               VCAMasterStrip* vms = (*i)[track_columns.vca];
+               AxisView* s = (*i)[stripable_columns.strip];
+               bool const visible = (*i)[stripable_columns.visible];
+               boost::shared_ptr<Stripable> stripable = (*i)[stripable_columns.stripable];
 
-               if (vms) {
-                       vca_packer.pack_start (*vms, false, false);
-                       vms->show ();
+               if (!s) {
+                       /* we're in the middle of changing a row, don't worry */
                        continue;
                }
 
-               MixerStrip* strip = (*i)[track_columns.strip];
+               VCAMasterStrip* vms;
 
-               if (!strip) {
-                       /* we're in the middle of changing a row, don't worry */
+               if ((vms = dynamic_cast<VCAMasterStrip*> (s))) {
+                       if (visible) {
+                               vca_hpacker.pack_start (*vms, false, false);
+                               vms->show ();
+                               n_masters++;
+                       }
                        continue;
                }
 
-               bool const visible = (*i)[track_columns.visible];
+               MixerStrip* strip = dynamic_cast<MixerStrip*> (s);
+
+               if (!strip) {
+                       continue;
+               }
 
                if (visible) {
-                       strip->set_gui_property ("visible", true);
 
                        if (strip->packed()) {
-
-                               if (strip->route()->is_master() || strip->route()->is_monitor()) {
-                                       out_packer.reorder_child (*strip, -1);
-
-                               } else {
-                                       strip_packer.reorder_child (*strip, -1); /* put at end */
-                               }
-
+                               strip_packer.reorder_child (*strip, -1); /* put at end */
                        } else {
-
-                               if (strip->route()->is_master() || strip->route()->is_monitor()) {
-                                       out_packer.pack_start (*strip, false, false);
-                               } else {
-                                       strip_packer.pack_start (*strip, false, false);
-                               }
+                               strip_packer.pack_start (*strip, false, false);
                                strip->set_packed (true);
                        }
 
                } else {
 
-                       strip->set_gui_property ("visible", false);
-
-                       if (strip->route()->is_master() || strip->route()->is_monitor()) {
+                       if (stripable->is_master() || stripable->is_monitor()) {
                                /* do nothing, these cannot be hidden */
                        } else {
                                if (strip->packed()) {
@@ -1279,6 +1375,16 @@ Mixer_UI::redisplay_track_list ()
                }
        }
 
+       /* update visibility of VCA assign buttons */
+
+       if (n_masters == 0) {
+               UIConfiguration::instance().set_mixer_strip_visibility (VisibilityGroup::remove_element (UIConfiguration::instance().get_mixer_strip_visibility(), X_("VCA")));
+               vca_vpacker.hide ();
+       } else {
+               UIConfiguration::instance().set_mixer_strip_visibility (VisibilityGroup::add_element (UIConfiguration::instance().get_mixer_strip_visibility(), X_("VCA")));
+               vca_vpacker.show ();
+       }
+
        _group_tabs->set_dirty ();
 }
 
@@ -1293,13 +1399,14 @@ Mixer_UI::strip_width_changed ()
        long order;
 
        for (order = 0, i = rows.begin(); i != rows.end(); ++i, ++order) {
-               MixerStrip* strip = (*i)[track_columns.strip];
+               AxisView* av = (*i)[stripable_columns.strip];
+               MixerStrip* strip = dynamic_cast<MixerStrip*> (av);
 
                if (strip == 0) {
                        continue;
                }
 
-               bool visible = (*i)[track_columns.visible];
+               bool visible = (*i)[stripable_columns.visible];
 
                if (visible) {
                        strip->queue_draw();
@@ -1309,27 +1416,50 @@ Mixer_UI::strip_width_changed ()
 
 }
 
+struct PresentationInfoMixerSorter
+{
+       bool operator() (boost::shared_ptr<Stripable> a, boost::shared_ptr<Stripable> b) {
+               if (a->is_master()) {
+                       /* master after everything else */
+                       return false;
+               } else if (b->is_master()) {
+                       /* everything else before master */
+                       return true;
+               }
+               return a->presentation_info().order () < b->presentation_info().order ();
+       }
+};
+
 void
 Mixer_UI::initial_track_display ()
 {
+       StripableList sl;
+
        boost::shared_ptr<RouteList> routes = _session->get_routes();
-       RouteList copy (*routes);
-       ARDOUR::SignalOrderRouteSorter sorter;
 
-       copy.sort (sorter);
+       for (RouteList::iterator r = routes->begin(); r != routes->end(); ++r) {
+               sl.push_back (*r);
+       }
+
+       VCAList vcas = _session->vca_manager().vcas();
+
+       for (VCAList::iterator v = vcas.begin(); v != vcas.end(); ++v) {
+               sl.push_back (boost::dynamic_pointer_cast<Stripable> (*v));
+       }
+
+       sl.sort (PresentationInfoMixerSorter());
 
        {
+               /* These are also used inside ::add_stripables() but we need
+                *  them here because we're going to clear the track_model also.
+                */
                Unwinder<bool> uw1 (no_track_list_redisplay, true);
                Unwinder<bool> uw2 (ignore_reorder, true);
 
                track_model->clear ();
-               VCAList vcas = _session->vca_manager().vcas();
-               add_masters (vcas);
-               add_strips (copy);
+               add_stripables (sl);
        }
 
-       _session->sync_order_keys ();
-
        redisplay_track_list ();
 }
 
@@ -1376,20 +1506,35 @@ Mixer_UI::build_track_menu ()
 }
 
 void
-Mixer_UI::strip_property_changed (const PropertyChange& what_changed, MixerStrip* mx)
+Mixer_UI::stripable_property_changed (const PropertyChange& what_changed, boost::weak_ptr<Stripable> ws)
 {
-       if (!what_changed.contains (ARDOUR::Properties::name)) {
+       if (!what_changed.contains (ARDOUR::Properties::hidden) && !what_changed.contains (ARDOUR::Properties::name)) {
                return;
        }
 
-       ENSURE_GUI_THREAD (*this, &Mixer_UI::strip_name_changed, what_changed, mx)
+       boost::shared_ptr<Stripable> s = ws.lock ();
+
+       if (!s) {
+               return;
+       }
 
        TreeModel::Children rows = track_model->children();
        TreeModel::Children::iterator i;
 
        for (i = rows.begin(); i != rows.end(); ++i) {
-               if ((*i)[track_columns.strip] == mx) {
-                       (*i)[track_columns.text] = mx->route()->name();
+               boost::shared_ptr<Stripable> ss = (*i)[stripable_columns.stripable];
+
+               if (s == ss) {
+
+                       if (what_changed.contains (ARDOUR::Properties::name)) {
+                               (*i)[stripable_columns.text] = s->name();
+                       }
+
+                       if (what_changed.contains (ARDOUR::Properties::hidden)) {
+                               (*i)[stripable_columns.visible] = !s->presentation_info().hidden();
+                               redisplay_track_list ();
+                       }
+
                        return;
                }
        }
@@ -1424,7 +1569,7 @@ Mixer_UI::group_display_button_press (GdkEventButton* ev)
        }
 
        switch (GPOINTER_TO_UINT (column->get_data (X_("colnum")))) {
-       case 0:
+       case 1:
                if (Keyboard::is_edit_event (ev)) {
                        if (group) {
                                // edit_route_group (group);
@@ -1436,7 +1581,7 @@ Mixer_UI::group_display_button_press (GdkEventButton* ev)
                }
                break;
 
-       case 1:
+       case 0:
        {
                bool visible = (*iter)[group_columns.visible];
                (*iter)[group_columns.visible] = !visible;
@@ -1502,9 +1647,7 @@ Mixer_UI::route_groups_changed ()
 void
 Mixer_UI::new_route_group ()
 {
-       RouteList rl;
-
-       _group_tabs->run_new_group_dialog (rl);
+       _group_tabs->run_new_group_dialog (0, false);
 }
 
 void
@@ -1585,12 +1728,6 @@ Mixer_UI::show_mixer_list (bool yn)
 {
        if (yn) {
                list_vpacker.show ();
-
-               //if user wants to show the pane, we should make sure that it is wide enough to be visible
-               int width = list_hpane.get_position();
-               if (width < 40) {
-                       list_hpane.set_position(40);
-               }
        } else {
                list_vpacker.hide ();
        }
@@ -1708,7 +1845,7 @@ Mixer_UI::add_route_group (RouteGroup* group)
 
        if (focus) {
                TreeViewColumn* col = group_display.get_column (0);
-               CellRendererText* name_cell = dynamic_cast<CellRendererText*>(group_display.get_column_cell_renderer (0));
+               CellRendererText* name_cell = dynamic_cast<CellRendererText*>(group_display.get_column_cell_renderer (1));
                group_display.set_cursor (group_model->get_path (row), *col, *name_cell, true);
        }
 
@@ -1740,7 +1877,7 @@ Mixer_UI::scroller_drag_data_received (const Glib::RefPtr<Gdk::DragContext>& con
        }
 
        const void * d = data.get_data();
-       const Gtkmm2ext::DnDTreeView<ARDOUR::PluginPresetPtr>* tv = reinterpret_cast<const Gtkmm2ext::DnDTreeView<ARDOUR::PluginPresetPtr>*>(d);                                                   
+       const Gtkmm2ext::DnDTreeView<ARDOUR::PluginPresetPtr>* tv = reinterpret_cast<const Gtkmm2ext::DnDTreeView<ARDOUR::PluginPresetPtr>*>(d);
 
        PluginPresetList nfos;
        TreeView* source;
@@ -1755,7 +1892,7 @@ Mixer_UI::scroller_drag_data_received (const Glib::RefPtr<Gdk::DragContext>& con
                if (!pip->is_instrument ()) {
                        continue;
                }
-               ARDOUR_UI::instance()->session_add_midi_track (NULL, 1, _("MIDI"), Config->get_strict_io (), pip, ppp->_preset.valid ? &ppp->_preset : 0);
+               ARDOUR_UI::instance()->session_add_midi_track ((RouteGroup*) 0, 1, _("MIDI"), Config->get_strict_io (), pip, ppp->_preset.valid ? &ppp->_preset : 0, PresentationInfo::max_order);
                ok = true;
        }
 
@@ -1799,6 +1936,7 @@ int
 Mixer_UI::set_state (const XMLNode& node, int version)
 {
        XMLProperty const * prop;
+       LocaleGuard lg;
 
        Tabbable::set_state (node, version);
 
@@ -1866,16 +2004,17 @@ Mixer_UI::get_state ()
 {
        XMLNode* node = new XMLNode (X_("Mixer"));
        char buf[128];
+       LocaleGuard lg;
 
        node->add_child_nocopy (Tabbable::get_state());
 
-       snprintf(buf,sizeof(buf), "%f", paned_position_as_fraction (rhs_pane1, true));
+       snprintf(buf,sizeof(buf), "%f", rhs_pane1.get_divider());
        node->add_property(X_("mixer-rhs-pane1-pos"), string(buf));
-       snprintf(buf,sizeof(buf), "%f", paned_position_as_fraction (rhs_pane2, true));
+       snprintf(buf,sizeof(buf), "%f", rhs_pane2.get_divider());
        node->add_property(X_("mixer-rhs_pane2-pos"), string(buf));
-       snprintf(buf,sizeof(buf), "%f", paned_position_as_fraction (list_hpane, false));
+       snprintf(buf,sizeof(buf), "%f", list_hpane.get_divider());
        node->add_property(X_("mixer-list-hpane-pos"), string(buf));
-       snprintf(buf,sizeof(buf), "%f", paned_position_as_fraction (inner_pane, false));
+       snprintf(buf,sizeof(buf), "%f", inner_pane.get_divider());
        node->add_property(X_("mixer-inner-pane-pos"), string(buf));
 
        node->add_property ("narrow-strips", _strip_width == Narrow ? "yes" : "no");
@@ -1900,149 +2039,6 @@ Mixer_UI::get_state ()
        return *node;
 }
 
-void
-Mixer_UI::pane_allocation_handler (Allocation& allocation, Gtk::Paned* which)
-{
-       float pos;
-       XMLProperty* prop = 0;
-       XMLNode* geometry = ARDOUR_UI::instance()->mixer_settings();
-       int height = default_height;
-       static bool done[4] = { false, false, false, false };
-
-       /* Gtk::Paned behaves very oddly and rather undesirably. Setting the
-        * position is a crapshoot if you time it incorrectly with the overall
-        * sizing of the Paned. For example, if you might retrieve the size with
-        * ::get_position() and then later call ::set_position() on a Paned at
-        * a time when its allocation is different than it was when you retrieved
-        * the position. The position will be interpreted as the size of the
-        * first (top or left) child widget. If packing/size allocation later
-        * resizes the Paned to a (final) smaller size, the position will be
-        * used in ways that mean that the Paned ends up NOT in the same state
-        * that it was in when you originally saved the position.
-        *
-        * Concrete example: Paned is 800 pixels wide, position is 400
-        * (halfway).  Save position as 400. During program restart, set
-        * position to 400, before Paned has been allocated any space. Paned
-        * ends up initially sized to 1200 pixels.  Position is now 1/3 of the
-        * way across/down.  Subsequent resizes will leave the position 1/3 of
-        * the way across, rather than leaving it as a fixed pixel
-        * position. Eventually, the Paned ends up 800 pixels wide/high again,
-        * but the position is now 267, not 400.
-        *
-        * So ...
-        *
-        * We deal with this by using two strategies:
-        *
-        * 1) only set the position if the allocated size of the Paned is at
-        * least as big as it needs to be for the position to make sense.
-        *
-        * 2) in recent versions of Ardour, save the position as a fraction,
-        * and restore it using that fraction.
-        *
-        * So, we will only call ::set_position() AFTER the Paned is of a
-        * sensible size, and then in addition, we will set the position in a
-        * way that will be maintained as/when/if the Paned is resized.
-        *
-        * Once we've called ::set_position() on a Paned, we don't do it
-        * again.
-        */
-
-       if (which == static_cast<Gtk::Paned*> (&rhs_pane1)) {
-
-               if (done[0]) {
-                       return;
-               }
-
-               if (!geometry || (prop = geometry->property("mixer-rhs-pane1-pos")) == 0) {
-                       pos = height / 3;
-               } else {
-                       pos = atof (prop->value());
-               }
-
-               if (pos > 1.0f) {
-                       /* older versions of Ardour stored absolute position */
-                       if ((done[0] = (allocation.get_height() > pos))) {
-                               rhs_pane1.set_position (pos);
-                       }
-               } else {
-                       if ((done[0] = (allocation.get_height() > 1.0/pos))) {
-                               paned_set_position_as_fraction (rhs_pane1, pos, true);
-                       }
-               }
-       }
-
-       if (which == static_cast<Gtk::Paned*> (&rhs_pane2)) {
-
-               if (done[1]) {
-                       return;
-               }
-
-               if (!geometry || (prop = geometry->property("mixer-rhs-pane2-pos")) == 0) {
-                       pos = 2 * height / 3;
-               } else {
-                       pos = atof (prop->value());
-               }
-
-               if (pos > 1.0f) {
-                       /* older versions of Ardour stored absolute position */
-                       if ((done[1] = (allocation.get_height() > pos))) {
-                               rhs_pane2.set_position (pos);
-                       }
-               } else {
-                       if ((done[1] = (allocation.get_height() > 1.0/pos))) {
-                               paned_set_position_as_fraction (rhs_pane2, pos, true);
-                       }
-               }
-       }
-
-       if (which == static_cast<Gtk::Paned*> (&list_hpane)) {
-
-               if (done[2]) {
-                       return;
-               }
-
-               if (!geometry || (prop = geometry->property("mixer-list-hpane-pos")) == 0) {
-                       pos = std::max ((float)100, rintf ((float) 125 * UIConfiguration::instance().get_ui_scale()));
-               } else {
-                       pos = max (0.1, atof (prop->value ()));
-               }
-
-               if (pos > 1.0f) {
-                       if ((done[2] = (allocation.get_width() > pos))) {
-                               list_hpane.set_position (pos);
-                       }
-               } else {
-                       if ((done[2] = (allocation.get_width() > 1.0/pos))) {
-                               paned_set_position_as_fraction (list_hpane, pos, false);
-                       }
-               }
-       }
-
-       if (which == static_cast<Gtk::Paned*> (&inner_pane)) {
-
-               if (done[3]) {
-                       return;
-               }
-
-               if (!geometry || (prop = geometry->property("mixer-inner-pane-pos")) == 0) {
-                       pos = std::max ((float)100, rintf ((float) 125 * UIConfiguration::instance().get_ui_scale()));
-               } else {
-                       pos = max (0.1, atof (prop->value ()));
-               }
-
-               if (pos > 1.0f) {
-                       /* older versions of Ardour stored absolute position */
-                       if ((done[3] = (allocation.get_width() > pos))) {
-                               inner_pane.set_position (pos);
-                       }
-               } else {
-                       if ((done[3] = (allocation.get_width() > 1.0/pos))) {
-                               paned_set_position_as_fraction (inner_pane, pos, false);
-                       }
-               }
-       }
-}
-
 void
 Mixer_UI::scroll_left ()
 {
@@ -2106,8 +2102,6 @@ Mixer_UI::parameter_changed (string const & p)
                for (list<MixerStrip*>::iterator i = strips.begin(); i != strips.end(); ++i) {
                        (*i)->set_width_enum (s ? Narrow : Wide, this);
                }
-       } else if (p == "remote-model") {
-               reset_remote_control_ids ();
        } else if (p == "use-monitor-bus") {
                if (_session && !_session->monitor_out()) {
                        monitor_section_detached ();
@@ -2135,15 +2129,15 @@ Mixer_UI::plugin_selector()
 void
 Mixer_UI::setup_track_display ()
 {
-       track_model = ListStore::create (track_columns);
+       track_model = ListStore::create (stripable_columns);
        track_display.set_model (track_model);
-       track_display.append_column (_("Strips"), track_columns.text);
-       track_display.append_column (_("Show"), track_columns.visible);
+       track_display.append_column (_("Show"), stripable_columns.visible);
+       track_display.append_column (_("Strips"), stripable_columns.text);
        track_display.get_column (0)->set_data (X_("colnum"), GUINT_TO_POINTER(0));
        track_display.get_column (1)->set_data (X_("colnum"), GUINT_TO_POINTER(1));
-       track_display.get_column (0)->set_expand(true);
-       track_display.get_column (1)->set_expand(false);
-       track_display.get_column (0)->set_sizing (Gtk::TREE_VIEW_COLUMN_FIXED);
+       track_display.get_column (0)->set_expand(false);
+       track_display.get_column (1)->set_expand(true);
+       track_display.get_column (1)->set_sizing (Gtk::TREE_VIEW_COLUMN_FIXED);
        track_display.set_name (X_("EditGroupList"));
        track_display.get_selection()->set_mode (Gtk::SELECTION_NONE);
        track_display.set_reorderable (true);
@@ -2153,7 +2147,7 @@ Mixer_UI::setup_track_display ()
        track_model->signal_row_deleted().connect (sigc::mem_fun (*this, &Mixer_UI::track_list_delete));
        track_model->signal_rows_reordered().connect (sigc::mem_fun (*this, &Mixer_UI::track_list_reorder));
 
-       CellRendererToggle* track_list_visible_cell = dynamic_cast<CellRendererToggle*>(track_display.get_column_cell_renderer (1));
+       CellRendererToggle* track_list_visible_cell = dynamic_cast<CellRendererToggle*>(track_display.get_column_cell_renderer (0));
        track_list_visible_cell->property_activatable() = true;
        track_list_visible_cell->property_radio() = false;
        track_list_visible_cell->signal_toggled().connect (sigc::mem_fun (*this, &Mixer_UI::track_visibility_changed));
@@ -2243,12 +2237,12 @@ Mixer_UI::strip_by_x (int x)
 }
 
 void
-Mixer_UI::set_route_targets_for_operation ()
+Mixer_UI::set_axis_targets_for_operation ()
 {
-       _route_targets.clear ();
+       _axis_targets.clear ();
 
        if (!_selection.empty()) {
-               _route_targets = _selection.routes;
+               _axis_targets = _selection.axes;
                return;
        }
 
@@ -2274,13 +2268,13 @@ Mixer_UI::toggle_midi_input_active (bool flip_others)
        boost::shared_ptr<RouteList> rl (new RouteList);
        bool onoff = false;
 
-       set_route_targets_for_operation ();
+       set_axis_targets_for_operation ();
 
-       for (RouteUISelection::iterator r = _route_targets.begin(); r != _route_targets.end(); ++r) {
-               boost::shared_ptr<MidiTrack> mt = (*r)->midi_track();
+       for (AxisViewSelection::iterator r = _axis_targets.begin(); r != _axis_targets.end(); ++r) {
+               boost::shared_ptr<MidiTrack> mt = boost::dynamic_pointer_cast<MidiTrack> ((*r)->stripable());
 
                if (mt) {
-                       rl->push_back ((*r)->route());
+                       rl->push_back (mt);
                        onoff = !mt->input_active();
                }
        }
@@ -2481,7 +2475,7 @@ Mixer_UI::popup_note_context_menu (GdkEventButton *ev)
        Gtk::Menu* m = manage (new Menu);
        MenuList& items = m->items ();
 
-       if (_selection.routes.empty()) {
+       if (_selection.axes.empty()) {
                items.push_back (MenuElem (_("No Track/Bus is selected.")));
        } else {
                items.push_back (MenuElem (_("Add at the top"),
@@ -2598,17 +2592,23 @@ Mixer_UI::plugin_row_activated (const TreeModel::Path& path, TreeViewColumn* col
 void
 Mixer_UI::add_favorite_processor (ARDOUR::PluginPresetPtr ppp, ProcessorPosition pos)
 {
-       if (!_session || _selection.routes.empty()) {
+       if (!_session || _selection.axes.empty()) {
                return;
        }
 
        PluginInfoPtr pip = ppp->_pip;
-       for (RouteUISelection::iterator i = _selection.routes.begin(); i != _selection.routes.end(); ++i) {
-               boost::shared_ptr<ARDOUR::Route> rt = (*i)->route();
-               if (!rt) { continue; }
+       for (AxisViewSelection::iterator i = _selection.axes.begin(); i != _selection.axes.end(); ++i) {
+               boost::shared_ptr<ARDOUR::Route> rt = boost::dynamic_pointer_cast<ARDOUR::Route> ((*i)->stripable());
+
+               if (!rt) {
+                       continue;
+               }
 
                PluginPtr p = pip->load (*_session);
-               if (!p) { continue; }
+
+               if (!p) {
+                       continue;
+               }
 
                if (ppp->_preset.valid) {
                        p->load_preset (ppp->_preset);
@@ -2708,3 +2708,248 @@ Mixer_UI::do_vca_unassign (boost::shared_ptr<VCA> vca)
        /* call protected MixerActor:: method */
        vca_unassign (vca);
 }
+
+void
+Mixer_UI::show_vca_slaves (boost::shared_ptr<VCA> vca)
+{
+       boost::shared_ptr<VCA> v = spilled_vca.lock();
+       if (v != vca) {
+               spilled_vca = vca;
+               show_vca_change (vca); /* EMIT SIGNAL */
+               if (vca) {
+                       _group_tabs->hide ();
+               } else {
+                       _group_tabs->show ();
+               }
+               redisplay_track_list ();
+       }
+}
+
+bool
+Mixer_UI::showing_vca_slaves_for (boost::shared_ptr<VCA> vca) const
+{
+       return vca == spilled_vca.lock();
+}
+
+void
+Mixer_UI::register_actions ()
+{
+       Glib::RefPtr<ActionGroup> group = myactions.create_action_group (X_("Mixer"));
+
+       myactions.register_action (group, "solo", _("Toggle Solo on Mixer-Selected Tracks/Busses"), sigc::mem_fun (*this, &Mixer_UI::solo_action));
+       myactions.register_action (group, "mute", _("Toggle Mute on Mixer-Selected Tracks/Busses"), sigc::mem_fun (*this, &Mixer_UI::mute_action));
+       myactions.register_action (group, "recenable", _("Toggle Rec-enable on Mixer-Selected Tracks/Busses"), sigc::mem_fun (*this, &Mixer_UI::rec_enable_action));
+       myactions.register_action (group, "increment-gain", _("Decrease Gain on Mixer-Selected Tracks/Busses"), sigc::mem_fun (*this, &Mixer_UI::step_gain_up_action));
+       myactions.register_action (group, "decrement-gain", _("Increase Gain on Mixer-Selected Tracks/Busses"), sigc::mem_fun (*this, &Mixer_UI::step_gain_down_action));
+       myactions.register_action (group, "unity-gain", _("Set Gain to 0dB on Mixer-Selected Tracks/Busses"), sigc::mem_fun (*this, &Mixer_UI::unity_gain_action));
+
+
+       myactions.register_action (group, "copy-processors", _("Copy Selected Processors"), sigc::mem_fun (*this, &Mixer_UI::copy_processors));
+       myactions.register_action (group, "cut-processors", _("Cut Selected Processors"), sigc::mem_fun (*this, &Mixer_UI::cut_processors));
+       myactions.register_action (group, "paste-processors", _("Paste Selected Processors"), sigc::mem_fun (*this, &Mixer_UI::paste_processors));
+       myactions.register_action (group, "delete-processors", _("Delete Selected Processors"), sigc::mem_fun (*this, &Mixer_UI::delete_processors));
+       myactions.register_action (group, "select-all-processors", _("Select All (visible) Processors"), sigc::mem_fun (*this, &Mixer_UI::select_all_processors));
+       myactions.register_action (group, "toggle-processors", _("Toggle Selected Processors"), sigc::mem_fun (*this, &Mixer_UI::toggle_processors));
+       myactions.register_action (group, "ab-plugins", _("Toggle Selected Plugins"), sigc::mem_fun (*this, &Mixer_UI::ab_plugins));
+       myactions.register_action (group, "select-none", _("Deselect all strips and processors"), sigc::mem_fun (*this, &Mixer_UI::select_none));
+
+       myactions.register_action (group, "scroll-left", _("Scroll Mixer Window to the left"), sigc::mem_fun (*this, &Mixer_UI::scroll_left));
+       myactions.register_action (group, "scroll-right", _("Scroll Mixer Window to the left"), sigc::mem_fun (*this, &Mixer_UI::scroll_right));
+
+       myactions.register_action (group, "toggle-midi-input-active", _("Toggle MIDI Input Active for Mixer-Selected Tracks/Busses"),
+                                  sigc::bind (sigc::mem_fun (*this, &Mixer_UI::toggle_midi_input_active), false));
+}
+
+void
+Mixer_UI::load_bindings ()
+{
+       bindings = Bindings::get_bindings (X_("Mixer"), myactions);
+}
+
+template<class T> void
+Mixer_UI::control_action (boost::shared_ptr<T> (Stripable::*get_control)() const)
+{
+       boost::shared_ptr<ControlList> cl (new ControlList);
+       boost::shared_ptr<AutomationControl> ac;
+       bool val = false;
+       bool have_val = false;
+
+       set_axis_targets_for_operation ();
+
+       BOOST_FOREACH(AxisView* r, _axis_targets) {
+               boost::shared_ptr<Stripable> s = r->stripable();
+               if (s) {
+                       ac = (s.get()->*get_control)();
+                       if (ac) {
+                               cl->push_back (ac);
+                               if (!have_val) {
+                                       val = !ac->get_value();
+                                       have_val = true;
+                               }
+                       }
+               }
+       }
+
+       _session->set_controls (cl,  val, Controllable::UseGroup);
+}
+
+void
+Mixer_UI::solo_action ()
+{
+       control_action (&Stripable::solo_control);
+}
+
+void
+Mixer_UI::mute_action ()
+{
+       control_action (&Stripable::mute_control);
+}
+
+void
+Mixer_UI::rec_enable_action ()
+{
+       control_action (&Stripable::rec_enable_control);
+}
+
+void
+Mixer_UI::step_gain_up_action ()
+{
+       set_axis_targets_for_operation ();
+
+       BOOST_FOREACH(AxisView* r, _axis_targets) {
+               MixerStrip* ms = dynamic_cast<MixerStrip*> (r);
+               if (ms) {
+                       ms->step_gain_up ();
+               }
+       }
+}
+
+void
+Mixer_UI::step_gain_down_action ()
+{
+       set_axis_targets_for_operation ();
+
+       BOOST_FOREACH(AxisView* r, _axis_targets) {
+               MixerStrip* ms = dynamic_cast<MixerStrip*> (r);
+               if (ms) {
+                       ms->step_gain_down ();
+               }
+       }
+}
+
+void
+Mixer_UI::unity_gain_action ()
+{
+       set_axis_targets_for_operation ();
+
+       BOOST_FOREACH(AxisView* r, _axis_targets) {
+               boost::shared_ptr<Stripable> s = r->stripable();
+               if (s) {
+                       boost::shared_ptr<AutomationControl> ac = s->gain_control();
+                       if (ac) {
+                               ac->set_value (1.0, Controllable::UseGroup);
+                       }
+               }
+       }
+}
+
+void
+Mixer_UI::copy_processors ()
+{
+       set_axis_targets_for_operation ();
+
+       BOOST_FOREACH(AxisView* r, _axis_targets) {
+               MixerStrip* ms = dynamic_cast<MixerStrip*> (r);
+               if (ms) {
+                       ms->copy_processors ();
+               }
+       }
+}
+void
+Mixer_UI::cut_processors ()
+{
+       set_axis_targets_for_operation ();
+
+       BOOST_FOREACH(AxisView* r, _axis_targets) {
+               MixerStrip* ms = dynamic_cast<MixerStrip*> (r);
+               if (ms) {
+                       ms->cut_processors ();
+               }
+       }
+}
+void
+Mixer_UI::paste_processors ()
+{
+       set_axis_targets_for_operation ();
+
+       BOOST_FOREACH(AxisView* r, _axis_targets) {
+               MixerStrip* ms = dynamic_cast<MixerStrip*> (r);
+               if (ms) {
+                       ms->paste_processors ();
+               }
+       }
+}
+void
+Mixer_UI::select_all_processors ()
+{
+       set_axis_targets_for_operation ();
+
+       BOOST_FOREACH(AxisView* r, _axis_targets) {
+               MixerStrip* ms = dynamic_cast<MixerStrip*> (r);
+               if (ms) {
+                       ms->select_all_processors ();
+               }
+       }
+}
+void
+Mixer_UI::toggle_processors ()
+{
+       set_axis_targets_for_operation ();
+
+       BOOST_FOREACH(AxisView* r, _axis_targets) {
+               MixerStrip* ms = dynamic_cast<MixerStrip*> (r);
+               if (ms) {
+                       ms->toggle_processors ();
+               }
+       }
+}
+void
+Mixer_UI::ab_plugins ()
+{
+       set_axis_targets_for_operation ();
+
+       BOOST_FOREACH(AxisView* r, _axis_targets) {
+               MixerStrip* ms = dynamic_cast<MixerStrip*> (r);
+               if (ms) {
+                       ms->ab_plugins ();
+               }
+       }
+}
+
+void
+Mixer_UI::vca_assign (boost::shared_ptr<VCA> vca)
+{
+       set_axis_targets_for_operation ();
+#if 0
+       BOOST_FOREACH(AxisView* r, _axis_targets) {
+               MixerStrip* ms = dynamic_cast<MixerStrip*> (r);
+               if (ms) {
+                       ms->vca_assign (vca);
+               }
+       }
+#endif
+}
+
+void
+Mixer_UI::vca_unassign (boost::shared_ptr<VCA> vca)
+{
+       set_axis_targets_for_operation ();
+#if 0
+       BOOST_FOREACH(AxisView* r, _axis_targets) {
+               MixerStrip* ms = dynamic_cast<MixerStrip*> (r);
+               if (ms) {
+                       ms->vca_unassign (vca);
+               }
+       }
+#endif
+}