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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.

    $Id: editor_tempodisplay.cc,v 1.36 2005/08/03 21:12:44 pauld Exp $
*/

#include <cstdio> // for sprintf, grrr 
#include <cstdlib>
#include <cmath>
#include <string>
#include <climits>

#include <gtk-canvas.h>

#include <pbd/error.h>

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

#include <ardour/session.h>
#include <ardour/tempo.h>
#include <gtkmmext/doi.h>

#include "editor.h"
#include "marker.h"
#include "canvas-simpleline.h"
#include "tempo_dialog.h"
#include "rgb_macros.h"
#include "gui_thread.h"

#include "i18n.h"

using namespace std;
using namespace SigC;
using namespace ARDOUR;
using namespace Gtk;
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)
{
      for (Metrics::const_iterator i = metrics.begin(); i != metrics.end(); ++i) {
            const MeterSection *ms;
            const TempoSection *ts;
            char buf[64];
            
            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, GTK_CANVAS_GROUP(meter_group), color_map[cMeterMarker], buf, 
                                                 *(const_cast<MeterSection*>(ms)), PublicEditor::canvas_meter_marker_event));
            } 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, GTK_CANVAS_GROUP(tempo_group), color_map[cTempoMarker], buf, 
                                                 *(const_cast<TempoSection*>(ts)), PublicEditor::canvas_tempo_marker_event));
            }
            
      }
}

void
Editor::tempo_map_changed (Change ignored)
{
      ENSURE_GUI_THREAD(bind (slot (*this, &Editor::tempo_map_changed), ignored));
      
      if (current_bbt_points) {
            delete current_bbt_points;
            current_bbt_points = 0;
      }

      if (session) {
            current_bbt_points = session->tempo_map().get_points (leftmost_frame, leftmost_frame + current_page_frames());
      } else {
            current_bbt_points = 0;
      }

      redisplay_tempo ();
}

void
Editor::redisplay_tempo ()
{
      update_tempo_based_rulers ();

      remove_metric_marks (); 
      hide_measures ();

      if (session && current_bbt_points) {
            session->tempo_map().apply_with_metrics (*this, &Editor::draw_metric_marks);
            draw_measures ();
      }
      
}

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

GtkCanvasItem *
Editor::get_time_line ()
{
      GtkCanvasItem *line;

      if (free_measure_lines.empty()) {
            line = gtk_canvas_item_new (GTK_CANVAS_GROUP(time_line_group),
                                  gtk_canvas_simpleline_get_type(),
                                  NULL);
            // cerr << "measure line @ " << line << endl;
            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;
}

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

      TempoMap::BBTPointList::iterator i;
      TempoMap::BBTPointList *all_bbt_points;
      GtkCanvasItem *line;
      gdouble xpos, last_xpos;
      uint32_t cnt;
      uint32_t color;

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

      all_bbt_points = session->tempo_map().get_points (leftmost_frame, leftmost_frame + current_page_frames());

      cnt = 0;
      last_xpos = 0;

      /* get the first bar spacing */

      gdouble last_beat = DBL_MAX;
      gdouble beat_spacing = 0;

      for (i = all_bbt_points->begin(); i != all_bbt_points->end() && beat_spacing == 0; ++i) {
            TempoMap::BBTPoint& p = (*i);

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

            case TempoMap::Beat:
                  xpos = p.frame / (gdouble) frames_per_unit;
                  if (last_beat < xpos) {
                        beat_spacing = xpos - last_beat;
                  }
                  last_beat = xpos;
            }
      }

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

            TempoMap::BBTPoint& p = (*i);

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

            case TempoMap::Beat:
                  xpos = p.frame / (gdouble) frames_per_unit;

                  if (p.beat == 1) {
                        color = color_map[cMeasureLineBeat];
                  } else {
                        color = color_map[cMeasureLineBar];

                        /* only draw beat lines if the gaps between beats
                           are large.
                        */

                        if (beat_spacing < 25.0) {
                              break;
                        }
                  }

                  if (cnt == 0 || xpos - last_xpos > 4.0) {
                        line = get_time_line ();
                        gtk_object_set (GTK_OBJECT(line),
                                    "x1", xpos,
                                    "x2", xpos,
                                    "y2", (gdouble) canvas_height,
                                    "color_rgba", color,
                                    NULL);
                        gtk_canvas_item_raise_to_top (line);
                        gtk_canvas_item_show (line);
                        last_xpos = xpos; 
                        ++cnt;
                  } 
                  break;
            }
      }

      delete all_bbt_points;

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

      gtk_canvas_item_raise_to_top (cursor_group);
      gtk_canvas_item_lower_to_bottom (time_line_group);
}

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


      TempoMap& map(session->tempo_map());
      TempoDialog tempo_dialog (map, frame, _("add"));
      
      tempo_dialog.bpm_entry.activate.connect (bind (slot (tempo_dialog, &ArdourDialog::stop), 0));
      tempo_dialog.ok_button.clicked.connect (bind (slot (tempo_dialog, &ArdourDialog::stop), 0));
      tempo_dialog.cancel_button.clicked.connect (bind (slot (tempo_dialog, &ArdourDialog::stop), -1));

      tempo_dialog.set_position (GTK_WIN_POS_MOUSE);
      tempo_dialog.realize ();
      tempo_dialog.get_window().set_decorations (GdkWMDecoration (GDK_DECOR_BORDER|GDK_DECOR_RESIZEH));

      ensure_float (tempo_dialog);

      tempo_dialog.run();

      if (tempo_dialog.run_status() == 0) {
            
            double bpm = 0;
            BBT_Time requested;

            bpm = tempo_dialog.get_bpm ();
            bpm = max (0.01, bpm);

            tempo_dialog.get_bbt_time (requested);

            begin_reversible_command (_("add tempo mark"));
            session->add_undo (map.get_memento());
            map.add_tempo (Tempo (bpm), requested);
            session->add_redo_no_execute (map.get_memento());
            commit_reversible_command ();

            map.dump (cerr);
      }
}

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


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

      meter_dialog.ok_button.clicked.connect (bind (slot (meter_dialog, &ArdourDialog::stop), 0));
      meter_dialog.cancel_button.clicked.connect (bind (slot (meter_dialog, &ArdourDialog::stop), -1));

      meter_dialog.set_position (GTK_WIN_POS_MOUSE);
      meter_dialog.realize ();
      meter_dialog.get_window().set_decorations (GdkWMDecoration (GDK_DECOR_BORDER|GDK_DECOR_RESIZEH));

      ensure_float (meter_dialog);
      
      meter_dialog.run ();
      
      if (meter_dialog.run_status() == 0) {
            
            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"));
            session->add_undo (map.get_memento());
            map.add_meter (Meter (bpb, note_type), requested);
            session->add_redo_no_execute (map.get_memento());
            commit_reversible_command ();

            map.dump (cerr);
      }
}

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

      if ((marker = reinterpret_cast<Marker *> (gtk_object_get_data (GTK_OBJECT(item), "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()) {
            Gtk::Main::idle.connect (bind (slot (*this, &Editor::real_remove_tempo_marker), &tempo_marker->tempo()));
      }
}

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

      meter_dialog.ok_button.clicked.connect (bind (slot (meter_dialog, &ArdourDialog::stop), 0));
      meter_dialog.cancel_button.clicked.connect (bind (slot (meter_dialog, &ArdourDialog::stop), -1));

      meter_dialog.set_position (GTK_WIN_POS_MOUSE);
      meter_dialog.realize ();
      meter_dialog.get_window().set_decorations (GdkWMDecoration (GDK_DECOR_BORDER|GDK_DECOR_RESIZEH));

      ensure_float (meter_dialog);

      meter_dialog.run ();

      if (meter_dialog.run_status() == 0) {

            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"));
            session->add_undo (session->tempo_map().get_memento());
            session->tempo_map().replace_meter (*section, Meter (bpb, note_type));
            session->add_redo_no_execute (session->tempo_map().get_memento());
            commit_reversible_command ();
      }
}

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

      tempo_dialog.bpm_entry.activate.connect (bind (slot (tempo_dialog, &ArdourDialog::stop), 0));
      tempo_dialog.ok_button.clicked.connect (bind (slot (tempo_dialog, &ArdourDialog::stop), 0));
      tempo_dialog.cancel_button.clicked.connect (bind (slot (tempo_dialog, &ArdourDialog::stop), -1));

      tempo_dialog.set_position (GTK_WIN_POS_MOUSE);
      tempo_dialog.realize ();
      tempo_dialog.get_window().set_decorations (GdkWMDecoration (GDK_DECOR_BORDER|GDK_DECOR_RESIZEH));

      ensure_float (tempo_dialog);
      
      tempo_dialog.run ();

      if (tempo_dialog.run_status() == 0) {

            double bpm = tempo_dialog.get_bpm ();
              BBT_Time when;
            tempo_dialog.get_bbt_time(when);
            bpm = max (0.01, bpm);

            begin_reversible_command (_("replace tempo mark"));
            session->add_undo (session->tempo_map().get_memento());
            session->tempo_map().replace_tempo (*section, Tempo (bpm));
            session->tempo_map().move_tempo (*section, when);
            session->add_redo_no_execute (session->tempo_map().get_memento());
            commit_reversible_command ();
      }
}

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

      if ((marker = reinterpret_cast<Marker *> (gtk_object_get_data (GTK_OBJECT(item), "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 (GtkCanvasItem *item)
{
      Marker* marker;
      MeterMarker* meter_marker;

      if ((marker = reinterpret_cast<Marker *> (gtk_object_get_data (GTK_OBJECT(item), "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"));
      session->add_undo (session->tempo_map().get_memento());
      session->tempo_map().remove_tempo (*section);
      session->add_redo_no_execute (session->tempo_map().get_memento());
      commit_reversible_command ();

      return FALSE;
}

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

      if ((marker = reinterpret_cast<Marker *> (gtk_object_get_data (GTK_OBJECT(item), "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()) {
            Gtk::Main::idle.connect (bind (slot (*this, &Editor::real_remove_meter_marker), &meter_marker->meter()));
      }
}

gint
Editor::real_remove_meter_marker (MeterSection *section)
{
      begin_reversible_command (_("remove tempo mark"));
      session->add_undo (session->tempo_map().get_memento());
      session->tempo_map().remove_meter (*section);
      session->add_redo_no_execute (session->tempo_map().get_memento());
      commit_reversible_command ();
      return FALSE;
}

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