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mixer_ui.cc

/*
    Copyright (C) 2000-2004 Paul Davis 

    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation; either version 2 of the License, or
    (at your option) any later version.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with this program; if not, write to the Free Software
    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.

*/

#include <algorithm>
#include <sigc++/bind.h>

#include <gtkmm/accelmap.h>

#include <pbd/convert.h>
#include <pbd/stacktrace.h>
#include <glibmm/thread.h>

#include <gtkmm2ext/gtk_ui.h>
#include <gtkmm2ext/utils.h>
#include <gtkmm2ext/stop_signal.h>
#include <gtkmm2ext/window_title.h>

#include <ardour/session.h>
#include <ardour/audio_track.h>
#include <ardour/session_route.h>
#include <ardour/audio_diskstream.h>
#include <ardour/plugin_manager.h>

#include "keyboard.h"
#include "mixer_ui.h"
#include "mixer_strip.h"
#include "plugin_selector.h"
#include "ardour_ui.h"
#include "prompter.h"
#include "utils.h"
#include "actions.h"
#include "gui_thread.h"

#include "i18n.h"

using namespace ARDOUR;
using namespace PBD;
using namespace Gtk;
using namespace Glib;
using namespace Gtkmm2ext;
using namespace sigc;
using namespace std;

using PBD::atoi;

Mixer_UI::Mixer_UI ()
      : Window (Gtk::WINDOW_TOPLEVEL)
{
      session = 0;
      _strip_width = Config->get_default_narrow_ms() ? Narrow : Wide;
      track_menu = 0;
      mix_group_context_menu = 0;
      no_track_list_redisplay = false;
      in_group_row_change = false;
      _visible = false;
      strip_redisplay_does_not_reset_order_keys = false;
      strip_redisplay_does_not_sync_order_keys = false;

      Route::SyncOrderKeys.connect (mem_fun (*this, &Mixer_UI::sync_order_keys));

      scroller_base.add_events (Gdk::BUTTON_PRESS_MASK|Gdk::BUTTON_RELEASE_MASK);
      scroller_base.set_name ("MixerWindow");
      scroller_base.signal_button_release_event().connect (mem_fun(*this, &Mixer_UI::strip_scroller_button_release));
      // add as last item of strip packer
      strip_packer.pack_end (scroller_base, true, true);

      scroller.add (strip_packer);
      scroller.set_policy (Gtk::POLICY_ALWAYS, Gtk::POLICY_AUTOMATIC);

      track_model = ListStore::create (track_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.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.set_name (X_("MixerTrackDisplayList"));
      track_display.get_selection()->set_mode (Gtk::SELECTION_NONE);
      track_display.set_reorderable (true);
      track_display.set_headers_visible (true);

      track_model->signal_row_deleted().connect (mem_fun (*this, &Mixer_UI::track_list_delete));
      track_model->signal_row_changed().connect (mem_fun (*this, &Mixer_UI::track_list_change));
      track_model->signal_rows_reordered().connect (mem_fun (*this, &Mixer_UI::track_list_reorder));

      CellRendererToggle* track_list_visible_cell = dynamic_cast<CellRendererToggle*>(track_display.get_column_cell_renderer (1));
      track_list_visible_cell->property_activatable() = true;
      track_list_visible_cell->property_radio() = false;

      track_display.signal_button_press_event().connect (mem_fun (*this, &Mixer_UI::track_display_button_press), false);

      track_display_scroller.add (track_display);
      track_display_scroller.set_policy (Gtk::POLICY_NEVER, Gtk::POLICY_AUTOMATIC);

      group_model = ListStore::create (group_columns);
      group_display.set_model (group_model);
      group_display.append_column (_("Group"), group_columns.text);
      group_display.append_column (_("Active"), group_columns.active);
      group_display.append_column (_("Show"), group_columns.visible);
      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 (2)->set_data (X_("colnum"), GUINT_TO_POINTER(2));
      group_display.get_column (0)->set_expand(true);
      group_display.get_column (1)->set_expand(false);
      group_display.get_column (2)->set_expand(false);
      group_display.set_name ("MixerGroupList");
      group_display.get_selection()->set_mode (Gtk::SELECTION_SINGLE);
      group_display.set_reorderable (true);
      group_display.set_headers_visible (true);
      group_display.set_rules_hint (true);

      /* name is directly editable */

      CellRendererText* name_cell = dynamic_cast<CellRendererText*>(group_display.get_column_cell_renderer (0));
      name_cell->property_editable() = true;
      name_cell->signal_edited().connect (mem_fun (*this, &Mixer_UI::mix_group_name_edit));

      /* use checkbox for the active column */

      CellRendererToggle* active_cell = dynamic_cast<CellRendererToggle*>(group_display.get_column_cell_renderer (1));
      active_cell->property_activatable() = true;
      active_cell->property_radio() = false;

      /* use checkbox for the visible column */

      active_cell = dynamic_cast<CellRendererToggle*>(group_display.get_column_cell_renderer (2));
      active_cell->property_activatable() = true;
      active_cell->property_radio() = false;

      group_model->signal_row_changed().connect (mem_fun (*this, &Mixer_UI::mix_group_row_change));

      group_display.signal_button_press_event().connect (mem_fun (*this, &Mixer_UI::group_display_button_press), false);

      group_display_scroller.add (group_display);
      group_display_scroller.set_policy (Gtk::POLICY_NEVER, Gtk::POLICY_AUTOMATIC);

      HBox* mix_group_display_button_box = manage (new HBox());

      Button* mix_group_add_button = manage (new Button ());
      Button* mix_group_remove_button = manage (new Button ());

      Widget* w;

      w = manage (new Image (Stock::ADD, ICON_SIZE_BUTTON));
      w->show();
      mix_group_add_button->add (*w);

      w = manage (new Image (Stock::REMOVE, ICON_SIZE_BUTTON));
      w->show();
      mix_group_remove_button->add (*w);

      mix_group_display_button_box->set_homogeneous (true);

      mix_group_add_button->signal_clicked().connect (mem_fun (*this, &Mixer_UI::new_mix_group));
      mix_group_remove_button->signal_clicked().connect (mem_fun (*this, &Mixer_UI::remove_selected_mix_group));

      mix_group_display_button_box->add (*mix_group_remove_button);
      mix_group_display_button_box->add (*mix_group_add_button);

      group_display_vbox.pack_start (group_display_scroller, true, true);
      group_display_vbox.pack_start (*mix_group_display_button_box, false, false);

      track_display_frame.set_name("BaseFrame");
      track_display_frame.set_shadow_type (Gtk::SHADOW_IN);
      track_display_frame.add(track_display_scroller);

      group_display_frame.set_name ("BaseFrame");
      group_display_frame.set_shadow_type (Gtk::SHADOW_IN);
      group_display_frame.add (group_display_vbox);

      rhs_pane1.pack1 (track_display_frame);
      rhs_pane1.pack2 (group_display_frame);

      list_vpacker.pack_start (rhs_pane1, true, true);

      global_hpacker.pack_start (scroller, true, true);
#ifdef GTKOSX
      /* current gtk-quartz has dirty updates on borders like this one */
      global_hpacker.pack_start (out_packer, false, false, 0);
#else
      global_hpacker.pack_start (out_packer, false, false, 12);
#endif
      list_hpane.add1(list_vpacker);
      list_hpane.add2(global_hpacker);

      rhs_pane1.signal_size_allocate().connect (bind (mem_fun(*this, &Mixer_UI::pane_allocation_handler), 
                                          static_cast<Gtk::Paned*> (&rhs_pane1)));
      list_hpane.signal_size_allocate().connect (bind (mem_fun(*this, &Mixer_UI::pane_allocation_handler), 
                                           static_cast<Gtk::Paned*> (&list_hpane)));
      
      global_vpacker.pack_start (list_hpane, true, true);

      add (global_vpacker);
      set_name ("MixerWindow");
      
      WindowTitle title(Glib::get_application_name());
      title += _("Mixer");
      set_title (title.get_string());

      set_wmclass (X_("ardour_mixer"), "Ardour");

      add_accel_group (ActionManager::ui_manager->get_accel_group());

      signal_delete_event().connect (mem_fun (*this, &Mixer_UI::hide_window));
      add_events (Gdk::KEY_PRESS_MASK|Gdk::KEY_RELEASE_MASK);

      _plugin_selector = new PluginSelector (PluginManager::the_manager());

      signal_configure_event().connect (mem_fun (*ARDOUR_UI::instance(), &ARDOUR_UI::configure_handler));

      _selection.RoutesChanged.connect (mem_fun(*this, &Mixer_UI::follow_strip_selection));

      auto_rebinding = FALSE;
}

Mixer_UI::~Mixer_UI ()
{
}

void
Mixer_UI::ensure_float (Window& win)
{
      win.set_transient_for (*this);
}

void
Mixer_UI::show_window ()
{
      show_all ();
      if (!_visible) {
            set_window_pos_and_size ();

            /* 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];
                  ms->set_width (ms->get_width(), ms->width_owner());
            }
      }
      _visible = true;
}

bool
Mixer_UI::hide_window (GdkEventAny *ev)
{
      get_window_pos_and_size ();

      _visible = false;
      return just_hide_it(ev, static_cast<Gtk::Window *>(this));
}


void
Mixer_UI::add_strip (Session::RouteList& routes)
{
      ENSURE_GUI_THREAD(bind (mem_fun(*this, &Mixer_UI::add_strip), routes));
      
      MixerStrip* strip;

      no_track_list_redisplay = true;
      strip_redisplay_does_not_sync_order_keys = true;

      for (Session::RouteList::iterator x = routes.begin(); x != routes.end(); ++x) {
            boost::shared_ptr<Route> route = (*x);

            if (route->hidden()) {
                  return;
            }
            
            strip = new MixerStrip (*this, *session, route);
            strips.push_back (strip);

            Config->get_default_narrow_ms() ? _strip_width = Narrow : _strip_width = Wide;

            if (strip->width_owner() != strip) {
                  strip->set_width (_strip_width, this);
            }

            show_strip (strip);
            
            TreeModel::Row row = *(track_model->append());
            row[track_columns.text] = route->name();
            row[track_columns.visible] = strip->marked_for_display();
            row[track_columns.route] = route;
            row[track_columns.strip] = strip;
            
            if (route->order_key (N_("signal")) == -1) {
                  route->set_order_key (N_("signal"), track_model->children().size()-1);
            }
            
            route->name_changed.connect (bind (mem_fun(*this, &Mixer_UI::strip_name_changed), strip));

            strip->GoingAway.connect (bind (mem_fun(*this, &Mixer_UI::remove_strip), strip));
#ifdef GTKOSX
            strip->WidthChanged.connect (mem_fun(*this, &Mixer_UI::queue_draw_all_strips));
#endif      
            strip->signal_button_release_event().connect (bind (mem_fun(*this, &Mixer_UI::strip_button_release_event), strip));
      }

      no_track_list_redisplay = false;

      redisplay_track_list ();
      
      strip_redisplay_does_not_sync_order_keys = false;
}

void
Mixer_UI::remove_strip (MixerStrip* strip)
{
      ENSURE_GUI_THREAD(bind (mem_fun(*this, &Mixer_UI::remove_strip), strip));
      
      TreeModel::Children rows = track_model->children();
      TreeModel::Children::iterator ri;
      list<MixerStrip *>::iterator i;

      if ((i = find (strips.begin(), strips.end(), strip)) != strips.end()) {
            strips.erase (i);
      }

      strip_redisplay_does_not_sync_order_keys = true;

      for (ri = rows.begin(); ri != rows.end(); ++ri) {
            if ((*ri)[track_columns.strip] == strip) {
                  track_model->erase (ri);
                  break;
            }
      }

      strip_redisplay_does_not_sync_order_keys = false;
}

const char*
Mixer_UI::get_order_key() 
{
      return X_("signal");
#if 0
      if (Config->get_sync_all_route_ordering()) {
            return X_("editor");
      } else {
            return X_("signal");
      }
#endif
}


void
Mixer_UI::sync_order_keys (const char *src)
{
      vector<int> neworder;
      TreeModel::Children rows = track_model->children();
      TreeModel::Children::iterator ri;

      if ((strcmp (src, get_order_key()) == 0) || !session || (session->state_of_the_state() & Session::Loading) || rows.empty()) {
            return;
      }

      for (ri = rows.begin(); ri != rows.end(); ++ri) {
            neworder.push_back (0);
      }

      bool changed = false;
      int order;

      for (order = 0, ri = rows.begin(); ri != rows.end(); ++ri, ++order) {
            boost::shared_ptr<Route> route = (*ri)[track_columns.route];
            int old_key = order;
            int new_key = route->order_key (get_order_key());

            neworder[new_key] = old_key;

            if (new_key != old_key) {
                  changed = true;
            }
      }

      if (changed) {
            strip_redisplay_does_not_reset_order_keys = true;
            track_model->reorder (neworder);
            strip_redisplay_does_not_reset_order_keys = false;
      }
}


void
Mixer_UI::follow_strip_selection ()
{
      for (list<MixerStrip *>::iterator i = strips.begin(); i != strips.end(); ++i) {
            (*i)->set_selected (_selection.selected ((*i)->route()));
      }
}

bool
Mixer_UI::strip_button_release_event (GdkEventButton *ev, MixerStrip *strip)
{
      if (ev->button == 1) {

            /* this allows the user to click on the strip to terminate comment
               editing. XXX it needs improving so that we don't select the strip
               at the same time.
            */
            
            if (_selection.selected (strip->route())) {
                  _selection.remove (strip->route());
            } else {
                  if (Keyboard::modifier_state_equals (ev->state, Keyboard::TertiaryModifier)) {
                        _selection.add (strip->route());
                  } else {
                        _selection.set (strip->route());
                  }
            }
      }

      return true;
}

void
Mixer_UI::connect_to_session (Session* sess)
{
      session = sess;

      XMLNode* node = ARDOUR_UI::instance()->mixer_settings();
      set_state (*node);

      WindowTitle title(session->name());
      title += _("Mixer");
      title += Glib::get_application_name();

      set_title (title.get_string());

      initial_track_display ();

      session->GoingAway.connect (mem_fun(*this, &Mixer_UI::disconnect_from_session));
      session->RouteAdded.connect (mem_fun(*this, &Mixer_UI::add_strip));
      session->mix_group_added.connect (mem_fun(*this, &Mixer_UI::add_mix_group));
      session->mix_group_removed.connect (mem_fun(*this, &Mixer_UI::mix_groups_changed));

      mix_groups_changed ();
      
      _plugin_selector->set_session (session);

      if (_visible) {
             show_window();
      }

      start_updating ();
}

void
Mixer_UI::disconnect_from_session ()
{
      ENSURE_GUI_THREAD(mem_fun(*this, &Mixer_UI::disconnect_from_session));
      
      group_model->clear ();
      _selection.clear ();

      WindowTitle title(Glib::get_application_name());
      title += _("Mixer");
      set_title (title.get_string());
      
      stop_updating ();
}

void
Mixer_UI::show_strip (MixerStrip* ms)
{
      TreeModel::Children rows = track_model->children();
      TreeModel::Children::iterator i;
      
      for (i = rows.begin(); i != rows.end(); ++i) {
      
            MixerStrip* strip = (*i)[track_columns.strip];
            if (strip == ms) {
                  (*i)[track_columns.visible] = true;
                  break;
            }
      }
}

void
Mixer_UI::hide_strip (MixerStrip* ms)
{
      TreeModel::Children rows = track_model->children();
      TreeModel::Children::iterator i;
      
      for (i = rows.begin(); i != rows.end(); ++i) {
            
            MixerStrip* strip = (*i)[track_columns.strip];
            if (strip == ms) {
                  (*i)[track_columns.visible] = false;
                  break;
            }
      }
}

gint
Mixer_UI::start_updating ()
{
    fast_screen_update_connection = ARDOUR_UI::instance()->SuperRapidScreenUpdate.connect (mem_fun(*this, &Mixer_UI::fast_update_strips));
    return 0;
}

gint
Mixer_UI::stop_updating ()
{
    fast_screen_update_connection.disconnect();
    return 0;
}

void
Mixer_UI::fast_update_strips ()
{
      if (is_mapped () && session) {
            for (list<MixerStrip *>::iterator i = strips.begin(); i != strips.end(); ++i) {
                  (*i)->fast_update ();
            }
      }
}

void
Mixer_UI::set_all_strips_visibility (bool yn)
{
      TreeModel::Children rows = track_model->children();
      TreeModel::Children::iterator i;

      no_track_list_redisplay = true;

      for (i = rows.begin(); i != rows.end(); ++i) {

            TreeModel::Row row = (*i);
            MixerStrip* strip = row[track_columns.strip];
            
            if (strip == 0) {
                  continue;
            }
            
            if (strip->route()->master() || strip->route()->control()) {
                  continue;
            }

            (*i)[track_columns.visible] = yn;
      }

      no_track_list_redisplay = false;
      redisplay_track_list ();
}


void
Mixer_UI::set_all_audio_visibility (int tracks, bool yn) 
{
        TreeModel::Children rows = track_model->children();
      TreeModel::Children::iterator i;

      no_track_list_redisplay = true;

      for (i = rows.begin(); i != rows.end(); ++i) {
            TreeModel::Row row = (*i);
            MixerStrip* strip = row[track_columns.strip];

            if (strip == 0) {
                  continue;
            }

            if (strip->route()->master() || strip->route()->control()) {
                  continue;
            }

            boost::shared_ptr<AudioTrack> at = strip->audio_track();

            switch (tracks) {
            case 0:
                  (*i)[track_columns.visible] = yn;
                  break;
                  
            case 1:
                  if (at) { /* track */
                        (*i)[track_columns.visible] = yn;
                  }
                  break;
                  
            case 2:
                  if (!at) { /* bus */
                        (*i)[track_columns.visible] = yn;
                  }
                  break;
            }
      }

      no_track_list_redisplay = false;
      redisplay_track_list ();
}

void
Mixer_UI::hide_all_routes ()
{
      set_all_strips_visibility (false);
}

void
Mixer_UI::show_all_routes ()
{
      set_all_strips_visibility (true);
}

void
Mixer_UI::show_all_audiobus ()
{
      set_all_audio_visibility (2, true);
}
void
Mixer_UI::hide_all_audiobus ()
{
      set_all_audio_visibility (2, false);
}

void
Mixer_UI::show_all_audiotracks()
{
      set_all_audio_visibility (1, true);
}
void
Mixer_UI::hide_all_audiotracks ()
{
      set_all_audio_visibility (1, false);
}

void
Mixer_UI::track_list_reorder (const TreeModel::Path& path, const TreeModel::iterator& iter, int* new_order)
{
      strip_redisplay_does_not_sync_order_keys = true;
      session->set_remote_control_ids();
      redisplay_track_list ();
      strip_redisplay_does_not_sync_order_keys = false;
}

void
Mixer_UI::track_list_change (const Gtk::TreeModel::Path& path,const Gtk::TreeModel::iterator& iter)
{
      // never reset order keys because of a property change
      strip_redisplay_does_not_reset_order_keys = true; 
      session->set_remote_control_ids();
      redisplay_track_list ();
      strip_redisplay_does_not_reset_order_keys = false;
}

void
Mixer_UI::track_list_delete (const Gtk::TreeModel::Path& path)
{
      /* this could require an order sync */
      session->set_remote_control_ids();
      redisplay_track_list ();
}

void
Mixer_UI::redisplay_track_list ()
{
      TreeModel::Children rows = track_model->children();
      TreeModel::Children::iterator i;
      long order;

      if (no_track_list_redisplay) {
            return;
      }

      for (order = 0, i = rows.begin(); i != rows.end(); ++i, ++order) {
            MixerStrip* strip = (*i)[track_columns.strip];

            if (strip == 0) {
                  /* we're in the middle of changing a row, don't worry */
                  continue;
            }

            bool visible = (*i)[track_columns.visible];
            
            boost::shared_ptr<Route> route = (*i)[track_columns.route];

            if (visible) {
                  strip->set_marked_for_display (true);

                  if (!strip_redisplay_does_not_reset_order_keys) {
                        strip->route()->set_order_key (get_order_key(), order);
                  } 

                  if (strip->packed()) {

                        if (strip->route()->master() || strip->route()->control()) {
                              out_packer.reorder_child (*strip, -1);
                        } else {
                              strip_packer.reorder_child (*strip, -1); /* put at end */
                        }

                  } else {

                        if (strip->route()->master() || strip->route()->control()) {
                              out_packer.pack_start (*strip, false, false);
                        } else {
                              strip_packer.pack_start (*strip, false, false);
                        }
                        strip->set_packed (true);
                        strip->show_all ();
                  }

            } else {

                  if (strip->route()->master() || strip->route()->control()) {
                        /* do nothing, these cannot be hidden */
                  } else {
                        if (strip->packed()) {
                              strip_packer.remove (*strip);
                              strip->set_packed (false);
                        }
                  }
            }
      }
      
      if (!strip_redisplay_does_not_reset_order_keys && !strip_redisplay_does_not_sync_order_keys) {
            session->sync_order_keys (get_order_key());
      }

      // Rebind all of the midi controls automatically
      
      if (auto_rebinding) {
            auto_rebind_midi_controls ();
      }
}

#ifdef GTKOSX
void
Mixer_UI::queue_draw_all_strips ()
{
      TreeModel::Children rows = track_model->children();
      TreeModel::Children::iterator i;
      long order;

      for (order = 0, i = rows.begin(); i != rows.end(); ++i, ++order) {
            MixerStrip* strip = (*i)[track_columns.strip];

            if (strip == 0) {
                  continue;
            }

            bool visible = (*i)[track_columns.visible];
            
            if (visible) {
                  strip->queue_draw();
            }
      }
}
#endif

void
Mixer_UI::set_auto_rebinding( bool val )
{
      if( val == TRUE )
      {
            auto_rebinding = TRUE;
            Session::AutoBindingOff();
      }
      else
      {
            auto_rebinding = FALSE;
            Session::AutoBindingOn();
      }
}

void 
Mixer_UI::toggle_auto_rebinding() 
{
      if (auto_rebinding)
      {
            set_auto_rebinding( FALSE );
      }
      
      else
      {
            set_auto_rebinding( TRUE );
      }

      auto_rebind_midi_controls();
}

void 
Mixer_UI::auto_rebind_midi_controls () 
{
      TreeModel::Children rows = track_model->children();
      TreeModel::Children::iterator i;
      int pos;

      // Create bindings for all visible strips and remove those that are not visible
      pos = 1;  // 0 is reserved for the master strip
      for (i = rows.begin(); i != rows.end(); ++i) {
            MixerStrip* strip = (*i)[track_columns.strip];
    
            if ( (*i)[track_columns.visible] == true ) {  // add bindings for
                  // make the actual binding
                  //cout<<"Auto Binding:  Visible Strip Found: "<<strip->name()<<endl;

                  int controlValue = pos;
                  if( strip->route()->master() ) {
                        controlValue = 0;
                  }
                  else {
                        pos++;
                  }

                  PBD::Controllable::CreateBinding ( strip->solo_button->get_controllable(), controlValue, 0);
                  PBD::Controllable::CreateBinding ( strip->mute_button->get_controllable(), controlValue, 1);

                  if( strip->is_audio_track() ) {
                        PBD::Controllable::CreateBinding ( strip->rec_enable_button->get_controllable(), controlValue, 2);
                  }

                  PBD::Controllable::CreateBinding ( &(strip->gpm.get_controllable()), controlValue, 3);
                  PBD::Controllable::CreateBinding ( strip->panners.get_controllable(), controlValue, 4);

            }
            else {  // Remove any existing binding
                  PBD::Controllable::DeleteBinding ( strip->solo_button->get_controllable() );
                  PBD::Controllable::DeleteBinding ( strip->mute_button->get_controllable() );

                  if( strip->is_audio_track() ) {
                        PBD::Controllable::DeleteBinding ( strip->rec_enable_button->get_controllable() );
                  }

                  PBD::Controllable::DeleteBinding ( &(strip->gpm.get_controllable()) );
                  PBD::Controllable::DeleteBinding ( strip->panners.get_controllable() ); // This only takes the first panner if there are multiples...
            }

      } // for
  
}


struct SignalOrderRouteSorter {
    bool operator() (boost::shared_ptr<Route> a, boost::shared_ptr<Route> b) {
          /* use of ">" forces the correct sort order */
          return a->order_key (Mixer_UI::get_order_key()) < b->order_key (Mixer_UI::get_order_key());
    }
};

void
Mixer_UI::initial_track_display ()
{
      boost::shared_ptr<Session::RouteList> routes = session->get_routes();
      Session::RouteList copy (*routes);
      SignalOrderRouteSorter sorter;

      copy.sort (sorter);
      
      no_track_list_redisplay = true;

      track_model->clear ();

      add_strip (copy);

      no_track_list_redisplay = false;

      redisplay_track_list ();
}

void
Mixer_UI::show_track_list_menu ()
{
      if (track_menu == 0) {
            build_track_menu ();
      }

      track_menu->popup (1, gtk_get_current_event_time());
}

bool
Mixer_UI::track_display_button_press (GdkEventButton* ev)
{
      if (Keyboard::is_context_menu_event (ev)) {
            show_track_list_menu ();
            return true;
      }

      TreeIter iter;
      TreeModel::Path path;
      TreeViewColumn* column;
      int cellx;
      int celly;
      
      if (!track_display.get_path_at_pos ((int)ev->x, (int)ev->y, path, column, cellx, celly)) {
            return false;
      }

      switch (GPOINTER_TO_UINT (column->get_data (X_("colnum")))) {
      case 0:
            /* allow normal processing to occur */
            return false;

      case 1: /* visibility */

            if ((iter = track_model->get_iter (path))) {
                  MixerStrip* strip = (*iter)[track_columns.strip];
                  if (strip) {

                        if (!strip->route()->master() && !strip->route()->control()) {
                              bool visible = (*iter)[track_columns.visible];
                              (*iter)[track_columns.visible] = !visible;
                        }
#ifdef GTKOSX
                        track_display.queue_draw();
#endif
                  }
            }
            return true;

      default:
            break;
      }

      return false;
}


void
Mixer_UI::build_track_menu ()
{
      using namespace Menu_Helpers;
      using namespace Gtk;

      track_menu = new Menu;
      track_menu->set_name ("ArdourContextMenu");
      MenuList& items = track_menu->items();
      
      items.push_back (MenuElem (_("Show All"), mem_fun(*this, &Mixer_UI::show_all_routes)));
      items.push_back (MenuElem (_("Hide All"), mem_fun(*this, &Mixer_UI::hide_all_routes)));
      items.push_back (MenuElem (_("Show All Audio Tracks"), mem_fun(*this, &Mixer_UI::show_all_audiotracks)));
      items.push_back (MenuElem (_("Hide All Audio Tracks"), mem_fun(*this, &Mixer_UI::hide_all_audiotracks)));
      items.push_back (MenuElem (_("Show All Audio Busses"), mem_fun(*this, &Mixer_UI::show_all_audiobus)));
      items.push_back (MenuElem (_("Hide All Audio Busses"), mem_fun(*this, &Mixer_UI::hide_all_audiobus)));

}

void
Mixer_UI::strip_name_changed (void* src, MixerStrip* mx)
{
      ENSURE_GUI_THREAD(bind (mem_fun(*this, &Mixer_UI::strip_name_changed), src, mx));
      
      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();
                  return;
            }
      } 

      error << _("track display list item for renamed strip not found!") << endmsg;
}


void
Mixer_UI::build_mix_group_context_menu ()
{
      using namespace Gtk::Menu_Helpers;

      mix_group_context_menu = new Menu;
      mix_group_context_menu->set_name ("ArdourContextMenu");
      MenuList& items = mix_group_context_menu->items();

      items.push_back (MenuElem (_("Activate All"), mem_fun(*this, &Mixer_UI::activate_all_mix_groups)));
      items.push_back (MenuElem (_("Disable All"), mem_fun(*this, &Mixer_UI::disable_all_mix_groups)));
      items.push_back (SeparatorElem());
      items.push_back (MenuElem (_("Add group"), mem_fun(*this, &Mixer_UI::new_mix_group)));
      
}

bool
Mixer_UI::group_display_button_press (GdkEventButton* ev)
{
      if (Keyboard::is_context_menu_event (ev)) {
            if (mix_group_context_menu == 0) {
                  build_mix_group_context_menu ();
            }
            mix_group_context_menu->popup (1, ev->time);
            return true;
      }


        RouteGroup* group;
      TreeIter iter;
      TreeModel::Path path;
      TreeViewColumn* column;
      int cellx;
      int celly;

      if (!group_display.get_path_at_pos ((int)ev->x, (int)ev->y, path, column, cellx, celly)) {
            return false;
      }

      switch (GPOINTER_TO_UINT (column->get_data (X_("colnum")))) {
      case 0:
            if (Keyboard::is_edit_event (ev)) {
                  if ((iter = group_model->get_iter (path))) {
                        if ((group = (*iter)[group_columns.group]) != 0) {
                              // edit_mix_group (group);
#ifdef GTKOSX
                              group_display.queue_draw();
#endif
                              return true;
                        }
                  }
                  
            } 
            break;

      case 1:
            if ((iter = group_model->get_iter (path))) {
                  bool active = (*iter)[group_columns.active];
                  (*iter)[group_columns.active] = !active;
#ifdef GTKOSX
                  group_display.queue_draw();
#endif
                  return true;
            }
            break;
            
      case 2:
            if ((iter = group_model->get_iter (path))) {
                  bool visible = (*iter)[group_columns.visible];
                  (*iter)[group_columns.visible] = !visible;
#ifdef GTKOSX
                  group_display.queue_draw();
#endif
                  return true;
            }
            break;

      default:
            break;
      }
      
      return false;
 }

void
Mixer_UI::activate_all_mix_groups ()
{
        Gtk::TreeModel::Children children = group_model->children();
      for(Gtk::TreeModel::Children::iterator iter = children.begin(); iter != children.end(); ++iter) {
              (*iter)[group_columns.active] = true;
      }
}

void
Mixer_UI::disable_all_mix_groups ()
{
        Gtk::TreeModel::Children children = group_model->children();
      for(Gtk::TreeModel::Children::iterator iter = children.begin(); iter != children.end(); ++iter) {
              (*iter)[group_columns.active] = false;
      }
}

void
Mixer_UI::mix_groups_changed ()
{
      ENSURE_GUI_THREAD (mem_fun (*this, &Mixer_UI::mix_groups_changed));

      /* just rebuild the while thing */

      group_model->clear ();

      {
            TreeModel::Row row;
            row = *(group_model->append());
            row[group_columns.active] = false;
            row[group_columns.visible] = true;
            row[group_columns.text] = (_("-all-"));
            row[group_columns.group] = 0;
      }

      session->foreach_mix_group (mem_fun (*this, &Mixer_UI::add_mix_group));
}

void
Mixer_UI::new_mix_group ()
{
      session->add_mix_group ("");
}

void
Mixer_UI::remove_selected_mix_group ()
{
      Glib::RefPtr<TreeSelection> selection = group_display.get_selection();
      TreeView::Selection::ListHandle_Path rows = selection->get_selected_rows ();

      if (rows.empty()) {
            return;
      }

      TreeView::Selection::ListHandle_Path::iterator i = rows.begin();
      TreeIter iter;
      
      /* selection mode is single, so rows.begin() is it */

      if ((iter = group_model->get_iter (*i))) {

            RouteGroup* rg = (*iter)[group_columns.group];

            if (rg) {
                  session->remove_mix_group (*rg);
            }
      }
}

void
Mixer_UI::group_flags_changed (void* src, RouteGroup* group)
{
      if (in_group_row_change) {
            return;
      }

      ENSURE_GUI_THREAD(bind (mem_fun(*this, &Mixer_UI::group_flags_changed), src, group));

      /* force an update of any mixer strips that are using this group,
         otherwise mix group names don't change in mixer strips 
      */

      for (list<MixerStrip *>::iterator i = strips.begin(); i != strips.end(); ++i) {
            if ((*i)->mix_group() == group) {
                  (*i)->mix_group_changed(0);
            }
      }
      
      TreeModel::iterator i;
      TreeModel::Children rows = group_model->children();
      Glib::RefPtr<TreeSelection> selection = group_display.get_selection();

      in_group_row_change = true;
      
      for (i = rows.begin(); i != rows.end(); ++i) {
            if ((*i)[group_columns.group] == group) {
                  (*i)[group_columns.visible] = !group->is_hidden ();
                  (*i)[group_columns.active] = group->is_active ();
                  (*i)[group_columns.text] = group->name ();
                  break;
            }
      }

      in_group_row_change = false;
}

void
Mixer_UI::mix_group_name_edit (const Glib::ustring& path, const Glib::ustring& new_text)
{
      RouteGroup* group;
      TreeIter iter;

      if ((iter = group_model->get_iter (path))) {
      
            if ((group = (*iter)[group_columns.group]) == 0) {
                  return;
            }
            
            if (new_text != group->name()) {
                  group->set_name (new_text);
            }
      }
}

void 
Mixer_UI::mix_group_row_change (const Gtk::TreeModel::Path& path,const Gtk::TreeModel::iterator& iter)
{
      RouteGroup* group;

      if (in_group_row_change) {
            return;
      }

      if ((group = (*iter)[group_columns.group]) == 0) {
            return;
      }

      if ((*iter)[group_columns.visible]) {
            for (list<MixerStrip *>::iterator i = strips.begin(); i != strips.end(); ++i) {
                  if ((*i)->mix_group() == group) {
                        show_strip (*i);
                  }
            }
      } else {
            for (list<MixerStrip *>::iterator i = strips.begin(); i != strips.end(); ++i) {
                  if ((*i)->mix_group() == group) {
                        hide_strip (*i);
                  }
            }
      } 

      bool active = (*iter)[group_columns.active];
      group->set_active (active, this);

      Glib::ustring name = (*iter)[group_columns.text];

      if (name != group->name()) {
            group->set_name (name);
      }

}

void
Mixer_UI::add_mix_group (RouteGroup* group)

{
      ENSURE_GUI_THREAD(bind (mem_fun(*this, &Mixer_UI::add_mix_group), group));
      bool focus = false;

      in_group_row_change = true;

      TreeModel::Row row = *(group_model->append());
      row[group_columns.active] = group->is_active();

      row[group_columns.visible] = false;

      for (list<MixerStrip *>::iterator i = strips.begin(); i != strips.end(); ++i) {
            if ((*i)->mix_group() == group) {
                  if ((*i)->marked_for_display()) {
                        row[group_columns.visible] = true;
                  }
                  break;
            }
      }

      row[group_columns.group] = group;
      if (!group->name().empty()) {
            row[group_columns.text] = group->name();
      } else {
            row[group_columns.text] = _("unnamed");
            focus = true;
      }

      group->FlagsChanged.connect (bind (mem_fun(*this, &Mixer_UI::group_flags_changed), group));
      
      if (focus) {
            TreeViewColumn* col = group_display.get_column (0);
            CellRendererText* name_cell = dynamic_cast<CellRendererText*>(group_display.get_column_cell_renderer (0));
            group_display.set_cursor (group_model->get_path (row), *col, *name_cell, true);
      }

      in_group_row_change = false;
}

bool
Mixer_UI::strip_scroller_button_release (GdkEventButton* ev)
{
      using namespace Menu_Helpers;

      if (Keyboard::is_context_menu_event (ev)) {
            ARDOUR_UI::instance()->add_route (this);
            return true;
      }

      return false;
}

void
Mixer_UI::set_strip_width (Width w)
{
      _strip_width = w;

      for (list<MixerStrip*>::iterator i = strips.begin(); i != strips.end(); ++i) {
            (*i)->set_width (w, this);
      }
}

void
Mixer_UI::set_window_pos_and_size ()
{
      resize (m_width, m_height);
      move (m_root_x, m_root_y);
}

      void
Mixer_UI::get_window_pos_and_size ()
{
      get_position(m_root_x, m_root_y);
      get_size(m_width, m_height);
}

int
Mixer_UI::set_state (const XMLNode& node)
{
      const XMLProperty* prop;
      XMLNode* geometry;
      
      m_width = default_width;
      m_height = default_height;
      m_root_x = 1;
      m_root_y = 1;
      
      if ((geometry = find_named_node (node, "geometry")) != 0) {

            XMLProperty* prop;

            if ((prop = geometry->property("x_size")) == 0) {
                  prop = geometry->property ("x-size");
            }
            if (prop) {
                  m_width = atoi(prop->value());
            }
            if ((prop = geometry->property("y_size")) == 0) {
                  prop = geometry->property ("y-size");
            }
            if (prop) {
                  m_height = atoi(prop->value());
            }

            if ((prop = geometry->property ("x_pos")) == 0) {
                  prop = geometry->property ("x-pos");
            }
            if (prop) {
                  m_root_x = atoi (prop->value());
                  
            }
            if ((prop = geometry->property ("y_pos")) == 0) {
                  prop = geometry->property ("y-pos");
            }
            if (prop) {
                  m_root_y = atoi (prop->value());
            }
      }

      set_window_pos_and_size ();

      if ((prop = node.property ("narrow-strips"))) {
            if (prop->value() == "yes") {
                  set_strip_width (Narrow);
            } else {
                  set_strip_width (Wide);
            }
      }

      if ((prop = node.property ("show-mixer"))) {
            if (prop->value() == "yes") {
                   _visible = true;
            }
      }

      return 0;
}

XMLNode&
Mixer_UI::get_state (void)
{
      XMLNode* node = new XMLNode ("Mixer");

      if (is_realized()) {
            Glib::RefPtr<Gdk::Window> win = get_window();
      
            get_window_pos_and_size ();

            XMLNode* geometry = new XMLNode ("geometry");
            char buf[32];
            snprintf(buf, sizeof(buf), "%d", m_width);
            geometry->add_property(X_("x_size"), string(buf));
            snprintf(buf, sizeof(buf), "%d", m_height);
            geometry->add_property(X_("y_size"), string(buf));
            snprintf(buf, sizeof(buf), "%d", m_root_x);
            geometry->add_property(X_("x_pos"), string(buf));
            snprintf(buf, sizeof(buf), "%d", m_root_y);
            geometry->add_property(X_("y_pos"), string(buf));
            
            // written only for compatibility, they are not used.
            snprintf(buf, sizeof(buf), "%d", 0);
            geometry->add_property(X_("x_off"), string(buf));
            snprintf(buf, sizeof(buf), "%d", 0);
            geometry->add_property(X_("y_off"), string(buf));

            snprintf(buf,sizeof(buf), "%d",gtk_paned_get_position (static_cast<Paned*>(&rhs_pane1)->gobj()));
            geometry->add_property(X_("mixer_rhs_pane1_pos"), string(buf));
            snprintf(buf,sizeof(buf), "%d",gtk_paned_get_position (static_cast<Paned*>(&list_hpane)->gobj()));
            geometry->add_property(X_("mixer_list_hpane_pos"), string(buf));

            node->add_child_nocopy (*geometry);
      }

      node->add_property ("narrow-strips", _strip_width == Narrow ? "yes" : "no");

      node->add_property ("show-mixer", _visible ? "yes" : "no");

      return *node;
}


void 
Mixer_UI::pane_allocation_handler (Allocation& alloc, Gtk::Paned* which)
{
      int pos;
      XMLProperty* prop = 0;
      char buf[32];
      XMLNode* node = ARDOUR_UI::instance()->mixer_settings();
      XMLNode* geometry;
      int width, height;
      static int32_t done[3] = { 0, 0, 0 };

      width = default_width;
      height = default_height;

      if ((geometry = find_named_node (*node, "geometry")) != 0) {


            if ((prop = geometry->property ("x_size")) == 0) {
                  prop = geometry->property ("x-size");
            }
            if (prop) {
                  width = atoi (prop->value());
            }
            if ((prop = geometry->property ("y_size")) == 0) {
                  prop = geometry->property ("y-size");
            }
            if (prop) {
                  height = atoi (prop->value());
            }
      }

      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;
                  snprintf (buf, sizeof(buf), "%d", pos);
            } else {
                  pos = atoi (prop->value());
            }

            if ((done[0] = GTK_WIDGET(rhs_pane1.gobj())->allocation.height > pos)) {
                  rhs_pane1.set_position (pos);
            }

      } else if (which == static_cast<Gtk::Paned*> (&list_hpane)) {

            if (done[2]) {
                  return;
            }

            if (!geometry || (prop = geometry->property("mixer_list_hpane_pos")) == 0) {
                  pos = 75;
                  snprintf (buf, sizeof(buf), "%d", pos);
            } else {
                  pos = atoi (prop->value());
            }

            if ((done[2] = GTK_WIDGET(list_hpane.gobj())->allocation.width > pos)) {
                  list_hpane.set_position (pos);
            }
      }
}

bool
Mixer_UI::on_key_press_event (GdkEventKey* ev)
{
      return key_press_focus_accelerator_handler (*this, ev);
}

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