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audio_region_editor.cc

/*
    Copyright (C) 2001 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 <pbd/memento_command.h>

#include <ardour/audioregion.h>
#include <ardour/playlist.h>
#include <ardour/utils.h>
#include <ardour/dB.h>
#include <gtkmm2ext/utils.h>
#include <gtkmm2ext/stop_signal.h>
#include <cmath>

#include "audio_region_editor.h"
#include "audio_region_view.h"
#include "ardour_ui.h"
#include "utils.h"
#include "gui_thread.h"

#include "i18n.h"

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

AudioRegionEditor::AudioRegionEditor (Session& s, boost::shared_ptr<AudioRegion> r, AudioRegionView& rv)
      : RegionEditor (s),
        _region (r),
        _region_view (rv),
        name_label (_("Name:")),
        audition_button (_("Audition")),
        time_table (5, 2),
        position_clock (X_("regionposition"), true, X_("AudioRegionEditorClock"), true),
        end_clock (X_("regionend"), true, X_("AudioRegionEditorClock"), true),
        length_clock (X_("regionlength"), true, X_("AudioRegionEditorClock"), true, true),
        /* XXX cannot edit sync point or start yet */
        sync_offset_clock (X_("regionsyncoffset"), true, X_("AudioRegionEditorClock"), false),
        start_clock (X_("regionstart"), true, X_("AudioRegionEditorClock"), false),
        gain_adjustment(accurate_coefficient_to_dB(_region->scale_amplitude()), -40.0, +40.0, 0.1, 1.0, 0)
{
      position_clock.set_session (&_session);
      end_clock.set_session (&_session);
      length_clock.set_session (&_session);
      sync_offset_clock.set_session (&_session);
      start_clock.set_session (&_session);

      name_entry.set_name ("AudioRegionEditorEntry");
      name_label.set_name ("AudioRegionEditorLabel");

      name_hbox.set_spacing (5);
      name_hbox.pack_start (name_label, false, false);
      name_hbox.pack_start (name_entry, false, false);

      ARDOUR_UI::instance()->tooltips().set_tip (audition_button, _("audition this region"));

      audition_button.unset_flags (Gtk::CAN_FOCUS);
      
      audition_button.set_events (audition_button.get_events() & ~(Gdk::ENTER_NOTIFY_MASK|Gdk::LEAVE_NOTIFY_MASK));

      top_row_button_hbox.set_border_width (5);
      top_row_button_hbox.set_spacing (5);
      top_row_button_hbox.set_homogeneous (false);
      top_row_button_hbox.pack_end (audition_button, false, false);
      
      top_row_hbox.pack_start (name_hbox, true, true);
      top_row_hbox.pack_end (top_row_button_hbox, true, true);

      position_label.set_name ("AudioRegionEditorLabel");
      position_label.set_text (_("Position:"));
      end_label.set_name ("AudioRegionEditorLabel");
      end_label.set_text (_("End:"));
      length_label.set_name ("AudioRegionEditorLabel");
      length_label.set_text (_("Length:"));
      sync_label.set_name ("AudioRegionEditorLabel");
      sync_label.set_text (_("Sync Point:"));
      start_label.set_name ("AudioRegionEditorLabel");
      start_label.set_text (_("File Start:"));
      
      time_table.set_col_spacings (2);
      time_table.set_row_spacings (5);
      time_table.set_border_width (5);

      position_alignment.set (1.0, 0.5);
      end_alignment.set (1.0, 0.5);
      length_alignment.set (1.0, 0.5);
      sync_alignment.set (1.0, 0.5);
      start_alignment.set (1.0, 0.5);

      position_alignment.add (position_label);
      end_alignment.add (end_label);
      length_alignment.add (length_label);
      sync_alignment.add (sync_label);
      start_alignment.add (start_label);

      time_table.attach (position_alignment, 0, 1, 0, 1, Gtk::FILL, Gtk::FILL);
      time_table.attach (position_clock, 1, 2, 0, 1, Gtk::FILL, Gtk::FILL);

      time_table.attach (end_alignment, 0, 1, 1, 2, Gtk::FILL, Gtk::FILL);
      time_table.attach (end_clock, 1, 2, 1, 2, Gtk::FILL, Gtk::FILL);

      time_table.attach (length_alignment, 0, 1, 2, 3, Gtk::FILL, Gtk::FILL);
      time_table.attach (length_clock, 1, 2, 2, 3, Gtk::FILL, Gtk::FILL);

      time_table.attach (sync_alignment, 0, 1, 3, 4, Gtk::FILL, Gtk::FILL);
      time_table.attach (sync_offset_clock, 1, 2, 3, 4, Gtk::FILL, Gtk::FILL);

      time_table.attach (start_alignment, 0, 1, 4, 5, Gtk::FILL, Gtk::FILL);
      time_table.attach (start_clock, 1, 2, 4, 5, Gtk::FILL, Gtk::FILL);

      gain_label.set_name ("AudioRegionEditorLabel");
      gain_label.set_text (_("Scale amplitude:"));
      gain_label.set_alignment (1, 0.5);
      gain_entry.configure (gain_adjustment, 0.0, 1);
      time_table.attach (gain_label, 0, 1, 6, 7, Gtk::FILL, Gtk::FILL);
      time_table.attach (gain_entry, 1, 2, 6, 7, Gtk::FILL, Gtk::FILL);
      
      lower_hbox.pack_start (time_table, true, true);
      lower_hbox.pack_start (sep1, false, false);
      lower_hbox.pack_start (sep2, false, false);

      get_vbox()->pack_start (top_row_hbox, true, true);
      get_vbox()->pack_start (sep3, false, false);
      get_vbox()->pack_start (lower_hbox, true, true);

      set_name ("AudioRegionEditorWindow");
      add_events (Gdk::KEY_PRESS_MASK|Gdk::KEY_RELEASE_MASK);

      signal_delete_event().connect (bind (sigc::ptr_fun (just_hide_it), static_cast<Window *> (this)));

      set_title (string_compose (_("Region %1"), _region->name()));

      show_all();

      name_changed ();
      bounds_changed (Change (StartChanged|LengthChanged|PositionChanged|StartChanged|Region::SyncOffsetChanged));
      gain_changed ();

      _region->StateChanged.connect (mem_fun(*this, &AudioRegionEditor::region_changed));
      
      spin_arrow_grab = false;
      
      connect_editor_events ();
}

AudioRegionEditor::~AudioRegionEditor ()
{
}

void
AudioRegionEditor::region_changed (Change what_changed)
{
      if (what_changed & NameChanged) {
            name_changed ();
      }

      if (what_changed & Change (BoundsChanged|StartChanged|Region::SyncOffsetChanged)) {
            bounds_changed (what_changed);
      }

      if (what_changed & AudioRegion::ScaleAmplitudeChanged) {
            gain_changed ();
      }
}

gint 
AudioRegionEditor::bpressed (GdkEventButton* ev, Gtk::SpinButton* but, void (AudioRegionEditor::*pmf)())
{
      switch (ev->button) {
      case 1:
      case 2:
      case 3:
            if (ev->type == GDK_BUTTON_PRESS) { /* no double clicks here */
                  if (!spin_arrow_grab) {
                        // GTK2FIX probably nuke the region editor
                        // if ((ev->window == but->gobj()->panel)) {
                        // spin_arrow_grab = true;
                        // (this->*pmf)();
                        // } 
                  } 
            } 
            break;
      default:
            break;
      }
      return FALSE;
}

gint 
AudioRegionEditor::breleased (GdkEventButton* ev, Gtk::SpinButton* but, void (AudioRegionEditor::*pmf)())
{
      if (spin_arrow_grab) {
            (this->*pmf)();
            spin_arrow_grab = false;
      }
      return FALSE;
}

void
AudioRegionEditor::connect_editor_events ()
{
      name_entry.signal_changed().connect (mem_fun(*this, &AudioRegionEditor::name_entry_changed));

      position_clock.ValueChanged.connect (mem_fun(*this, &AudioRegionEditor::position_clock_changed));
      end_clock.ValueChanged.connect (mem_fun(*this, &AudioRegionEditor::end_clock_changed));
      length_clock.ValueChanged.connect (mem_fun(*this, &AudioRegionEditor::length_clock_changed));
      gain_adjustment.signal_value_changed().connect (mem_fun (*this, &AudioRegionEditor::gain_adjustment_changed));
 
      audition_button.signal_toggled().connect (mem_fun(*this, &AudioRegionEditor::audition_button_toggled));
      _session.AuditionActive.connect (mem_fun(*this, &AudioRegionEditor::audition_state_changed));
}

void
AudioRegionEditor::position_clock_changed ()
{
      _session.begin_reversible_command (_("change region start position"));

      boost::shared_ptr<Playlist> pl = _region->playlist();

      if (pl) {
            XMLNode &before = pl->get_state();
            _region->set_position (position_clock.current_time(), this);
            XMLNode &after = pl->get_state();
            _session.add_command(new MementoCommand<Playlist>(*pl, &before, &after));
      }

      _session.commit_reversible_command ();
}

void
AudioRegionEditor::end_clock_changed ()
{
      _session.begin_reversible_command (_("change region end position"));

      boost::shared_ptr<Playlist> pl = _region->playlist();
      
      if (pl) {
            XMLNode &before = pl->get_state();
            _region->trim_end (end_clock.current_time(), this);
            XMLNode &after = pl->get_state();
            _session.add_command(new MementoCommand<Playlist>(*pl, &before, &after));
      }

      _session.commit_reversible_command ();

      end_clock.set (_region->position() + _region->length()-1, true);
}

void
AudioRegionEditor::length_clock_changed ()
{
      nframes_t frames = length_clock.current_time();
      
      _session.begin_reversible_command (_("change region length"));
      
      boost::shared_ptr<Playlist> pl = _region->playlist();

      if (pl) {
            XMLNode &before = pl->get_state();
            _region->trim_end (_region->position() + frames -1, this);
            XMLNode &after = pl->get_state();
            _session.add_command(new MementoCommand<Playlist>(*pl, &before, &after));
      }

      _session.commit_reversible_command ();

      length_clock.set (_region->length());
}

void
AudioRegionEditor::gain_changed ()
{
      float const region_gain_dB = accurate_coefficient_to_dB (_region->scale_amplitude());
      if (region_gain_dB != gain_adjustment.get_value()) {
            gain_adjustment.set_value(region_gain_dB);
      }
}

void
AudioRegionEditor::gain_adjustment_changed ()
{
      float const gain = dB_to_coefficient (gain_adjustment.get_value());
      if (_region->scale_amplitude() != gain) {
            _region->set_scale_amplitude (gain);
      }
}

void
AudioRegionEditor::audition_button_toggled ()
{
      if (audition_button.get_active()) {
            _session.audition_region (_region);
      } else {
            _session.cancel_audition ();
      }
}

void
AudioRegionEditor::name_changed ()
{
      if (name_entry.get_text() != _region->name()) {
            name_entry.set_text (_region->name());
      }
}

void
AudioRegionEditor::bounds_changed (Change what_changed)
{
      if ((what_changed & Change (PositionChanged|LengthChanged)) == Change (PositionChanged|LengthChanged)) {
            position_clock.set (_region->position(), true);
            end_clock.set (_region->position() + _region->length() -1, true);
            length_clock.set (_region->length(), true);
      } else if (what_changed & Change (PositionChanged)) {
            position_clock.set (_region->position(), true);
            end_clock.set (_region->position() + _region->length() -1, true);
      } else if (what_changed & Change (LengthChanged)) {
            end_clock.set (_region->position() + _region->length() -1, true);
            length_clock.set (_region->length(), true);
      }

      if (what_changed & Region::SyncOffsetChanged) {
            sync_offset_clock.set (_region->sync_position(), true);
      }

      if (what_changed & StartChanged) {
            start_clock.set (_region->start(), true);
      }
}

void
AudioRegionEditor::activation ()
{
      
}     

void
AudioRegionEditor::name_entry_changed ()
{
      if (name_entry.get_text() != _region->name()) {
            _region->set_name (name_entry.get_text());
      }
}

void
AudioRegionEditor::audition_state_changed (bool yn)
{
      ENSURE_GUI_THREAD (bind (mem_fun(*this, &AudioRegionEditor::audition_state_changed), yn));

      if (!yn) {
            audition_button.set_active (false);
      }
}


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