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editor_mixer.cc

/*
    Copyright (C) 2003-2004 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 <glibmm/miscutils.h>
#include <gtkmm2ext/utils.h>
#include <gtkmm2ext/window_title.h>

#include <pbd/enumwriter.h>

#include <ardour/audioengine.h>

#include "editor.h"
#include "mixer_strip.h"
#include "ardour_ui.h"
#include "selection.h"
#include "audio_time_axis.h"
#include "actions.h"

#include "i18n.h"

using namespace Gtkmm2ext;
using namespace PBD;

void
Editor::editor_mixer_button_toggled ()
{
      Glib::RefPtr<Gtk::Action> act = ActionManager::get_action (X_("Editor"), X_("show-editor-mixer"));
      if (act) {
            Glib::RefPtr<Gtk::ToggleAction> tact = Glib::RefPtr<Gtk::ToggleAction>::cast_dynamic(act);
            show_editor_mixer (tact->get_active());
      }
}

void
Editor::cms_deleted ()
{
      current_mixer_strip = 0;
}

void
Editor::show_editor_mixer (bool yn)
{
      show_editor_mixer_when_tracks_arrive = false;

      if (yn) {

            if (current_mixer_strip == 0) {

                  if (selection->tracks.empty()) {
                        
                        if (track_views.empty()) {    
                              show_editor_mixer_when_tracks_arrive = true;
                              return;
                        } 
                        
                        for (TrackViewList::iterator i = track_views.begin(); i != track_views.end(); ++i) {
                              AudioTimeAxisView* atv;

                              if ((atv = dynamic_cast<AudioTimeAxisView*> (*i)) != 0) {
                                    
                                    current_mixer_strip = new MixerStrip (*ARDOUR_UI::instance()->the_mixer(),
                                                                  *session,
                                                                  atv->route(), false);

                                    current_mixer_strip->GoingAway.connect (mem_fun(*this, &Editor::cms_deleted));                                    
                                    break;
                              }
                        }

                  } else {

                        sort_track_selection ();

                        for (TrackSelection::iterator i = selection->tracks.begin(); i != selection->tracks.end(); ++i) {
                              AudioTimeAxisView* atv;

                              if ((atv = dynamic_cast<AudioTimeAxisView*> (*i)) != 0) {

                                    current_mixer_strip = new MixerStrip (*ARDOUR_UI::instance()->the_mixer(),
                                                                  *session,
                                                                  atv->route(), false);
                                    current_mixer_strip->GoingAway.connect (mem_fun(*this, &Editor::cms_deleted));                                    
                                    break;
                              }
                        }

                  }

                  if (current_mixer_strip == 0) {
                        return;
                  }           
            }
            
            if (current_mixer_strip->get_parent() == 0) {
                  current_mixer_strip->set_embedded (true);
                  current_mixer_strip->Hiding.connect (mem_fun(*this, &Editor::current_mixer_strip_hidden));
                  current_mixer_strip->GoingAway.connect (mem_fun(*this, &Editor::current_mixer_strip_removed));
                  current_mixer_strip->set_width (editor_mixer_strip_width, (void*) this);

                  global_hpacker.pack_start (*current_mixer_strip, Gtk::PACK_SHRINK );
                  global_hpacker.reorder_child (*current_mixer_strip, 0);

                  current_mixer_strip->show_all ();
            }

      } else {

            if (current_mixer_strip) {
                    editor_mixer_strip_width = current_mixer_strip->get_width ();
                  if (current_mixer_strip->get_parent() != 0) {
                        global_hpacker.remove (*current_mixer_strip);
                  }
            }
      }
}

void
Editor::set_selected_mixer_strip (TimeAxisView& view)
{
      AudioTimeAxisView* at;
      bool show = false;

      if (!session || (at = dynamic_cast<AudioTimeAxisView*>(&view)) == 0) {
            return;
      }
      
      if (current_mixer_strip) {

            /* might be nothing to do */

            if (current_mixer_strip->route() == at->route()) {
                  return;
            }

            if (current_mixer_strip->get_parent()) {
                  show = true;
            }
            delete current_mixer_strip;
            current_mixer_strip = 0;
      }

      current_mixer_strip = new MixerStrip (*ARDOUR_UI::instance()->the_mixer(),
                                    *session,
                                    at->route());
      current_mixer_strip->GoingAway.connect (mem_fun(*this, &Editor::cms_deleted));
      
      if (show) {
            show_editor_mixer (true);
      }
}

double current = 0.0;
bool currentInitialized = 0;

void
Editor::update_current_screen ()
{
      if (session && session->engine().running()) {

            nframes_t frame;

            frame = session->audible_frame();

            if (_dragging_playhead) {
                  goto almost_done;
            }

            /* only update if the playhead is on screen or we are following it */

            if (_follow_playhead) {

                  playhead_cursor->canvas_item.show();

                  if (frame != last_update_frame) {


#undef CONTINUOUS_SCROLL
#ifndef  CONTINUOUS_SCROLL
                        if (frame < leftmost_frame || frame > leftmost_frame + current_page_frames()) {
                              
                              if (session->transport_speed() < 0) {
                                    if (frame > (current_page_frames()/2)) {
                                          center_screen (frame-(current_page_frames()/2));
                                    } else {
                                          center_screen (current_page_frames()/2);
                                    }
                              } else {
                                    center_screen (frame+(current_page_frames()/2));
                              }
                        }

                        playhead_cursor->set_position (frame);

#else  // CONTINUOUS_SCROLL
                        
                        /* don't do continuous scroll till the new position is in the rightmost quarter of the 
                           editor canvas
                        */
                        
                        if (session->transport_speed()) {
                              double target = ((double)frame - (double)current_page_frames()/2.0) / frames_per_unit;
                              if (target <= 0.0) target = 0.0;
                              if ( fabs(target - current) < current_page_frames()/frames_per_unit ) {
                                    target = (target * 0.15) + (current * 0.85);
                              } else {
                                    /* relax */
                              }
                              //printf("frame: %d,  cpf: %d,  fpu: %6.6f, current: %6.6f, target : %6.6f\n", frame, current_page_frames(), frames_per_unit, current, target );
                              current = target;
                              horizontal_adjustment.set_value ( current );
                        }
                        
                        playhead_cursor->set_position (frame);

#endif // CONTINUOUS_SCROLL

                  }

            } else {
                  
                  if (frame != last_update_frame) {
                        if (frame < leftmost_frame || frame > leftmost_frame + current_page_frames()) {
                              playhead_cursor->canvas_item.hide();
                        } else {
                              playhead_cursor->set_position (frame);
                        }
                  }
            }

        almost_done:
            last_update_frame = frame;

            if (current_mixer_strip) {
                  current_mixer_strip->fast_update ();
            }
            
      }
}

void
Editor::current_mixer_strip_removed ()
{
      if (current_mixer_strip) {
            /* it is being deleted */
            current_mixer_strip = 0;
      }
}

void
Editor::current_mixer_strip_hidden ()
{
      for (TrackViewList::iterator i = track_views.begin(); i != track_views.end(); ++i) {
            
            AudioTimeAxisView* tmp;
            
            if ((tmp = dynamic_cast<AudioTimeAxisView*>(*i)) != 0) {
                  if (tmp->route() == current_mixer_strip->route()) {
                        (*i)->set_selected (false);
                        break;
                  }
            }
      }

      Glib::RefPtr<Gtk::Action> act = ActionManager::get_action (X_("Editor"), X_("show-editor-mixer"));
      if (act) {
            Glib::RefPtr<Gtk::ToggleAction> tact = Glib::RefPtr<Gtk::ToggleAction>::cast_dynamic(act);
            tact->set_active (false);
      }
}

void
Editor::session_going_away ()
{
      for (vector<sigc::connection>::iterator i = session_connections.begin(); i != session_connections.end(); ++i) {
            (*i).disconnect ();
      }

      stop_scrolling ();
      selection->clear ();
      cut_buffer->clear ();

      clicked_regionview = 0;
      clicked_trackview = 0;
      clicked_audio_trackview = 0;
      clicked_crossfadeview = 0;
      entered_regionview = 0;
      entered_track = 0;
      latest_regionview = 0;
      last_update_frame = 0;
      drag_info.item = 0;
      last_canvas_frame = 0;

      /* hide all tracks */

      hide_all_tracks (false);

      /* rip everything out of the list displays */

      region_list_display.set_model (Glib::RefPtr<Gtk::TreeStore>(0));
      route_list_display.set_model (Glib::RefPtr<Gtk::TreeStore>(0));
      named_selection_display.set_model (Glib::RefPtr<Gtk::TreeStore>(0));
      edit_group_display.set_model (Glib::RefPtr<Gtk::TreeStore>(0));

      region_list_model->clear ();
      route_display_model->clear ();
      named_selection_model->clear ();
      group_model->clear ();

      region_list_display.set_model (region_list_model);
      route_list_display.set_model (route_display_model);
      named_selection_display.set_model (named_selection_model);
      edit_group_display.set_model (group_model);

      edit_cursor_clock.set_session (0);
      zoom_range_clock.set_session (0);
      nudge_clock.set_session (0);

      /* put editor/mixer toggle button in off position and disable until a new session is loaded */

      editor_mixer_button.set_active(false);
      editor_mixer_button.set_sensitive(false);
      /* clear tempo/meter rulers */

      remove_metric_marks ();
      hide_measures ();
      clear_marker_display ();

      if (current_bbt_points) {
            delete current_bbt_points;
            current_bbt_points = 0;
      }

      /* mixer strip will be deleted all by itself 
         when its route is deleted.
      */

      current_mixer_strip = 0;

      WindowTitle title(Glib::get_application_name());
      title += _("Editor");

      set_title (title.get_string());

      session = 0;
}

void
Editor::maybe_add_mixer_strip_width (XMLNode& node)
{
      if (current_mixer_strip) {
            node.add_property ("mixer-width", enum_2_string (current_mixer_strip->get_width()));
      }
}

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