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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.

    $Id: editor_mixer.cc,v 1.35 2006/01/29 23:25:41 essej Exp $
*/

#include <gtkmmext/utils.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 "i18n.h"

void
Editor::editor_mixer_button_toggled ()
{
      show_editor_mixer (ARDOUR_UI::instance()->editor_mixer_button().get_active());
}

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

void
Editor::show_editor_mixer (bool yn)
{
      if (yn) {

            if (current_mixer_strip == 0) {

                  if (selection->tracks.empty()) {
                        
                        if (track_views.empty()) {
                              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 (slot (*this, &Editor::cms_deleted));                                
                                    break;
                              }
                        }

                  } else {
                        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 (slot (*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 (slot (*this, &Editor::current_mixer_strip_hidden));
                  current_mixer_strip->GoingAway.connect (slot (*this, &Editor::current_mixer_strip_removed));
                  current_mixer_strip->set_width (editor_mixer_strip_width);
                  current_mixer_strip->show_all ();
                  
                  global_hpacker.pack_start (*current_mixer_strip, false, false);
                  global_hpacker.reorder_child (*current_mixer_strip, 0);
            }

      } 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 (slot (*this, &Editor::cms_deleted));
      
      if (show) {
            show_editor_mixer (true);
      }
}

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

            jack_nframes_t frame;

            frame = session->audible_frame();

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

            if (_follow_playhead) {

                  gtk_canvas_item_show (playhead_cursor->canvas_item);

                  if (frame != last_update_frame) {

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

            last_update_frame = frame;

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

void
Editor::update_slower ()
{
            if (current_mixer_strip) {
                  current_mixer_strip->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;
                  }
            }
      }
      global_hpacker.remove (*current_mixer_strip);
}

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;
      region_list_display_drag_region = 0;
      last_update_frame = 0;
      drag_info.item = 0;
      last_audition_region = 0;
      region_list_button_region = 0;

      /* hide all tracks */

      hide_all_tracks (false);

      /* rip everything out of the list displays */

      region_list_clear (); // no clear() method in gtkmm 1.2 
      route_list.clear ();
      named_selection_display.clear ();
      edit_group_list.clear ();

      edit_cursor_clock.set_session (0);
      selection_start_clock.set_session (0);
      selection_end_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 */

      ARDOUR_UI::instance()->editor_mixer_button().set_active(false);
      ARDOUR_UI::instance()->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;
      }

      if (embed_audio_item) {
            embed_audio_item->set_sensitive (false);
      } 

      if (import_audio_item) {
            import_audio_item->set_sensitive (false);
      }

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

      current_mixer_strip = 0;

      set_title (_("ardour: editor"));

      session = 0;
}

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