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editor_tempodisplay.cc

/*
    Copyright (C) 2002 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 <cstdio> // for sprintf, grrr 
#include <cstdlib>
#include <cmath>
#include <string>
#include <climits>

#include <libgnomecanvasmm.h>

#include <pbd/error.h>
#include <pbd/memento_command.h>

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

#include <ardour/session.h>
#include <ardour/tempo.h>
#include <gtkmm2ext/doi.h>
#include <gtkmm2ext/utils.h>

#include "editor.h"
#include "marker.h"
#include "simpleline.h"
#include "tempo_dialog.h"
#include "rgb_macros.h"
#include "gui_thread.h"
#include "ardour_ui.h"
#include "time_axis_view.h"

#include "i18n.h"

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

void
Editor::remove_metric_marks ()
{
      /* don't delete these while handling events, just punt till the GUI is idle */

      for (Marks::iterator x = metric_marks.begin(); x != metric_marks.end(); ++x) {
            delete_when_idle (*x);
      }
      metric_marks.clear ();
}     

void
Editor::draw_metric_marks (const Metrics& metrics)
{

        const MeterSection *ms;
      const TempoSection *ts;
      char buf[64];
      
      remove_metric_marks ();
      
      for (Metrics::const_iterator i = metrics.begin(); i != metrics.end(); ++i) {
            
            if ((ms = dynamic_cast<const MeterSection*>(*i)) != 0) {
                  snprintf (buf, sizeof(buf), "%g/%g", ms->beats_per_bar(), ms->note_divisor ());
                  metric_marks.push_back (new MeterMarker (*this, *meter_group, ARDOUR_UI::config()->canvasvar_MeterMarker.get(), buf, 
                                                 *(const_cast<MeterSection*>(ms))));
            } else if ((ts = dynamic_cast<const TempoSection*>(*i)) != 0) {
                  snprintf (buf, sizeof (buf), "%.2f", ts->beats_per_minute());
                  metric_marks.push_back (new TempoMarker (*this, *tempo_group, ARDOUR_UI::config()->canvasvar_TempoMarker.get(), buf, 
                                                 *(const_cast<TempoSection*>(ts))));
            }
            
      }

}

void
Editor::tempo_map_changed (Change ignored)
{
      if (!session) {
            return;
      }

      ENSURE_GUI_THREAD(bind (mem_fun (*this, &Editor::tempo_map_changed), ignored));
      
      redisplay_tempo (false); // redraw rulers and measures
      session->tempo_map().apply_with_metrics (*this, &Editor::draw_metric_marks); // redraw metric markers
}

/**
 * This code was originally in tempo_map_changed, but this is called every time the canvas scrolls horizontally. 
 * That's why this is moved in here. The new tempo_map_changed is called when the ARDOUR::TempoMap actually changed.
 */
void
Editor::redisplay_tempo (bool immediate_redraw)
{
      if (!session) {
            return;
      }

      BBT_Time previous_beat, next_beat; // the beats previous to the leftmost frame and after the rightmost frame

      session->bbt_time(leftmost_frame, previous_beat);
      session->bbt_time(leftmost_frame + current_page_frames(), next_beat);

      if (previous_beat.beats > 1) {
              previous_beat.beats -= 1;
      } else if (previous_beat.bars > 1) {
              previous_beat.bars--;
            previous_beat.beats += 1;
      }
      previous_beat.ticks = 0;

      if (session->tempo_map().meter_at(leftmost_frame + current_page_frames()).beats_per_bar () > next_beat.beats + 1) {
            next_beat.beats += 1;
      } else {
            next_beat.bars += 1;
            next_beat.beats = 1;
      }
      next_beat.ticks = 0;
      
      if (current_bbt_points) {
              delete current_bbt_points;
            current_bbt_points = 0;
      }

      if (session) {
            current_bbt_points = session->tempo_map().get_points (session->tempo_map().frame_time (previous_beat), session->tempo_map().frame_time (next_beat));
            update_tempo_based_rulers ();
      } else {
            current_bbt_points = 0;
      }

      if (immediate_redraw) {

            hide_measures ();

            if (session && current_bbt_points) {
                  draw_measures ();
            }

      } else {

            if (session && current_bbt_points) {
                  Glib::signal_idle().connect (mem_fun (*this, &Editor::lazy_hide_and_draw_measures));
            } else {
                  hide_measures ();
            }
      }
}

void
Editor::hide_measures ()
{
      for (TimeLineList::iterator i = used_measure_lines.begin(); i != used_measure_lines.end(); ++i) {
                  (*i)->hide();
            free_measure_lines.push_back (*i);
      }
      used_measure_lines.clear ();
}

ArdourCanvas::SimpleLine *
Editor::get_time_line ()
{
         ArdourCanvas::SimpleLine *line;

      if (free_measure_lines.empty()) {
              line = new ArdourCanvas::SimpleLine (*time_line_group);
            used_measure_lines.push_back (line);
      } else {
            line = free_measure_lines.front();
            free_measure_lines.erase (free_measure_lines.begin());
            used_measure_lines.push_back (line);
      }

      return line;
}

bool
Editor::lazy_hide_and_draw_measures ()
{
      hide_measures ();
      draw_measures ();
      return false;
}

void
Editor::draw_measures ()
{
      if (session == 0 || _show_measures == false) {
            return;
      }

      TempoMap::BBTPointList::iterator i;
      ArdourCanvas::SimpleLine *line;
      gdouble xpos;
      double x1, x2, y1, y2, beat_density;

        uint32_t beats = 0;
        uint32_t bars = 0;
      uint32_t color;

      if (current_bbt_points == 0 || current_bbt_points->empty()) {
            return;
      }

      track_canvas->get_scroll_region (x1, y1, x2, y2);
      y2 = TimeAxisView::hLargest*5000; // five thousand largest tracks should be enough.. :)

      /* get the first bar spacing */

      i = current_bbt_points->end();
      i--;
      bars = (*i).bar - (*current_bbt_points->begin()).bar;
      beats = current_bbt_points->size() - bars;

      beat_density =  (beats * 10.0f) / track_canvas->get_width ();

      if (beat_density > 4.0f) {
            /* if the lines are too close together, they become useless
             */
            return;
      }

      for (i = current_bbt_points->begin(); i != current_bbt_points->end(); ++i) {

            switch ((*i).type) {
            case TempoMap::Bar:
                  break;

            case TempoMap::Beat:
                  
                  if ((*i).beat == 1) {
                        color = ARDOUR_UI::config()->canvasvar_MeasureLineBar.get();
                  } else {
                        color = ARDOUR_UI::config()->canvasvar_MeasureLineBeat.get();

                        if (beat_density > 2.0) {
                              /* only draw beat lines if the gaps between beats are large.
                              */
                              break;
                        }
                  }

                  xpos = frame_to_unit ((*i).frame);
                  line = get_time_line ();
                  line->property_x1() = xpos;
                  line->property_x2() = xpos;
                  line->property_y2() = y2;
                  line->property_color_rgba() = color;
                  //line->raise_to_top();
                  line->show();     
                  break;
            }
      }

      /* the cursors are always on top of everything */

      cursor_group->raise_to_top();
      time_line_group->lower_to_bottom();
      if (logo_item) {
            logo_item->lower_to_bottom ();
      }
      return;
}

void
Editor::mouse_add_new_tempo_event (nframes_t frame)
{
      if (session == 0) {
            return;
      }

      TempoMap& map(session->tempo_map());
      TempoDialog tempo_dialog (map, frame, _("add"));
      
      tempo_dialog.set_position (Gtk::WIN_POS_MOUSE);
      //this causes compiz to display no border.
      //tempo_dialog.signal_realize().connect (bind (sigc::ptr_fun (set_decoration), &tempo_dialog, Gdk::WMDecoration (Gdk::DECOR_BORDER|Gdk::DECOR_RESIZEH)));

      ensure_float (tempo_dialog);

      switch (tempo_dialog.run()) {
      case RESPONSE_ACCEPT:
            break;
      default:
            return;
      }

      double bpm = 0;
      BBT_Time requested;
      
      bpm = tempo_dialog.get_bpm ();
      double nt = tempo_dialog.get_note_type();
      bpm = max (0.01, bpm);
      
      tempo_dialog.get_bbt_time (requested);
      
      begin_reversible_command (_("add tempo mark"));
        XMLNode &before = map.get_state();
      map.add_tempo (Tempo (bpm,nt), requested);
        XMLNode &after = map.get_state();
      session->add_command(new MementoCommand<TempoMap>(map, &before, &after));
      commit_reversible_command ();
      
      //map.dump (cerr);
}

void
Editor::mouse_add_new_meter_event (nframes_t frame)
{
      if (session == 0) {
            return;
      }


      TempoMap& map(session->tempo_map());
      MeterDialog meter_dialog (map, frame, _("add"));

      meter_dialog.set_position (Gtk::WIN_POS_MOUSE);

      //this causes compiz to display no border.. 
      //meter_dialog.signal_realize().connect (bind (sigc::ptr_fun (set_decoration), &meter_dialog, Gdk::WMDecoration (Gdk::DECOR_BORDER|Gdk::DECOR_RESIZEH)));

      ensure_float (meter_dialog);
      
      switch (meter_dialog.run ()) {
      case RESPONSE_ACCEPT:
            break;
      default:
            return;
      }

      double bpb = meter_dialog.get_bpb ();
      bpb = max (1.0, bpb); // XXX is this a reasonable limit?
      
      double note_type = meter_dialog.get_note_type ();
      BBT_Time requested;

      meter_dialog.get_bbt_time (requested);

      begin_reversible_command (_("add meter mark"));
        XMLNode &before = map.get_state();
      map.add_meter (Meter (bpb, note_type), requested);
      session->add_command(new MementoCommand<TempoMap>(map, &before, &map.get_state()));
      commit_reversible_command ();
      
      //map.dump (cerr);
}

void
Editor::remove_tempo_marker (ArdourCanvas::Item* item)
{
      Marker* marker;
      TempoMarker* tempo_marker;

      if ((marker = reinterpret_cast<Marker *> (item->get_data ("marker"))) == 0) {
            fatal << _("programming error: tempo marker canvas item has no marker object pointer!") << endmsg;
            /*NOTREACHED*/
      }

      if ((tempo_marker = dynamic_cast<TempoMarker*> (marker)) == 0) {
            fatal << _("programming error: marker for tempo is not a tempo marker!") << endmsg;
            /*NOTREACHED*/
      }           

      if (tempo_marker->tempo().movable()) {
        Glib::signal_idle().connect (bind (mem_fun(*this, &Editor::real_remove_tempo_marker), &tempo_marker->tempo()));
      }
}

void
Editor::edit_meter_section (MeterSection* section)
{
      MeterDialog meter_dialog (*section, _("done"));

      meter_dialog.set_position (Gtk::WIN_POS_MOUSE);

      ensure_float (meter_dialog);

      switch (meter_dialog.run()) {
      case RESPONSE_ACCEPT:
            break;
      default:
            return;
      }

      double bpb = meter_dialog.get_bpb ();
      bpb = max (1.0, bpb); // XXX is this a reasonable limit?
      
      double note_type = meter_dialog.get_note_type ();

      begin_reversible_command (_("replace tempo mark"));
        XMLNode &before = session->tempo_map().get_state();
      session->tempo_map().replace_meter (*section, Meter (bpb, note_type));
        XMLNode &after = session->tempo_map().get_state();
      session->add_command(new MementoCommand<TempoMap>(session->tempo_map(), &before, &after));
      commit_reversible_command ();
}

void
Editor::edit_tempo_section (TempoSection* section)
{
      TempoDialog tempo_dialog (*section, _("done"));

      tempo_dialog.set_position (Gtk::WIN_POS_MOUSE);

      ensure_float (tempo_dialog);
      
      switch (tempo_dialog.run ()) {
      case RESPONSE_ACCEPT:
            break;
      default:
            return;
      }

      double bpm = tempo_dialog.get_bpm ();
      double nt = tempo_dialog.get_note_type ();
      BBT_Time when;
      tempo_dialog.get_bbt_time(when);
      bpm = max (0.01, bpm);
      
      cerr << "Editing tempo section to be at " << when << endl;
      session->tempo_map().dump (cerr);
      begin_reversible_command (_("replace tempo mark"));
        XMLNode &before = session->tempo_map().get_state();
      session->tempo_map().replace_tempo (*section, Tempo (bpm,nt));
      session->tempo_map().dump (cerr);
      session->tempo_map().move_tempo (*section, when);
      session->tempo_map().dump (cerr);
        XMLNode &after = session->tempo_map().get_state();
      session->add_command (new MementoCommand<TempoMap>(session->tempo_map(), &before, &after));
      commit_reversible_command ();
}

void
Editor::edit_tempo_marker (ArdourCanvas::Item *item)
{
      Marker* marker;
      TempoMarker* tempo_marker;

      if ((marker = reinterpret_cast<Marker *> (item->get_data ("marker"))) == 0) {
            fatal << _("programming error: tempo marker canvas item has no marker object pointer!") << endmsg;
            /*NOTREACHED*/
      }

      if ((tempo_marker = dynamic_cast<TempoMarker*> (marker)) == 0) {
            fatal << _("programming error: marker for tempo is not a tempo marker!") << endmsg;
            /*NOTREACHED*/
      }           

      edit_tempo_section (&tempo_marker->tempo());
}

void
Editor::edit_meter_marker (ArdourCanvas::Item *item)
{
      Marker* marker;
      MeterMarker* meter_marker;

      if ((marker = reinterpret_cast<Marker *> (item->get_data ("marker"))) == 0) {
            fatal << _("programming error: tempo marker canvas item has no marker object pointer!") << endmsg;
            /*NOTREACHED*/
      }

      if ((meter_marker = dynamic_cast<MeterMarker*> (marker)) == 0) {
            fatal << _("programming error: marker for meter is not a meter marker!") << endmsg;
            /*NOTREACHED*/
      }           
      
      edit_meter_section (&meter_marker->meter());
}

gint
Editor::real_remove_tempo_marker (TempoSection *section)
{
      begin_reversible_command (_("remove tempo mark"));
      XMLNode &before = session->tempo_map().get_state();
      session->tempo_map().remove_tempo (*section);
      XMLNode &after = session->tempo_map().get_state();
      session->add_command(new MementoCommand<TempoMap>(session->tempo_map(), &before, &after));
      commit_reversible_command ();

      return FALSE;
}

void
Editor::remove_meter_marker (ArdourCanvas::Item* item)
{
      Marker* marker;
      MeterMarker* meter_marker;

      if ((marker = reinterpret_cast<Marker *> (item->get_data ("marker"))) == 0) {
            fatal << _("programming error: meter marker canvas item has no marker object pointer!") << endmsg;
            /*NOTREACHED*/
      }

      if ((meter_marker = dynamic_cast<MeterMarker*> (marker)) == 0) {
            fatal << _("programming error: marker for meter is not a meter marker!") << endmsg;
            /*NOTREACHED*/
      }           

      if (meter_marker->meter().movable()) {
        Glib::signal_idle().connect (bind (mem_fun(*this, &Editor::real_remove_meter_marker), &meter_marker->meter()));
      }
}

gint
Editor::real_remove_meter_marker (MeterSection *section)
{
      begin_reversible_command (_("remove tempo mark"));
      XMLNode &before = session->tempo_map().get_state();
      session->tempo_map().remove_meter (*section);
      XMLNode &after = session->tempo_map().get_state();
      session->add_command(new MementoCommand<TempoMap>(session->tempo_map(), &before, &after));
      commit_reversible_command ();

      return FALSE;
}

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