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audio_clock.cc

/*
    Copyright (C) 1999 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
#include <cmath>

#include <pbd/convert.h>
#include <pbd/enumwriter.h>

#include <gtkmm2ext/utils.h>

#include <ardour/ardour.h>
#include <ardour/session.h>
#include <ardour/tempo.h>
#include <ardour/profile.h>
#include <sigc++/bind.h>

#include "ardour_ui.h"
#include "audio_clock.h"
#include "utils.h"
#include "keyboard.h"
#include "i18n.h"

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

using PBD::atoi;
using PBD::atof;

sigc::signal<void> AudioClock::ModeChanged;
vector<AudioClock*> AudioClock::clocks;

const uint32_t AudioClock::field_length[(int) AudioClock::AudioFrames+1] = {
      2,   /* SMPTE_Hours */
      2,   /* SMPTE_Minutes */
      2,   /* SMPTE_Seconds */
      2,   /* SMPTE_Frames */
      2,   /* MS_Hours */
      2,   /* MS_Minutes */
      5,   /* MS_Seconds */
      3,   /* Bars */
      2,   /* Beats */
      4,   /* Tick */
      10   /* Audio Frame */
};

AudioClock::AudioClock (std::string clock_name, bool transient, std::string widget_name, bool allow_edit, bool duration, bool with_info) 
      : _name (clock_name),
        is_transient (transient),
        is_duration (duration),
        editable (allow_edit),
        colon1 (":"),
        colon2 (":"),
        colon3 (":"),
        colon4 (":"),
        colon5 (":"),
        b1 ("|"),
        b2 ("|")
{
      session = 0;
      last_when = 0;
      last_pdelta = 0;
      last_sdelta = 0;
      key_entry_state = 0;
      ops_menu = 0;
      dragging = false;
      bbt_reference_time = -1;

      if (with_info) {
            frames_upper_info_label = manage (new Label);
            frames_lower_info_label = manage (new Label);
            smpte_upper_info_label = manage (new Label);
            smpte_lower_info_label = manage (new Label);
            bbt_upper_info_label = manage (new Label);
            bbt_lower_info_label = manage (new Label);
            
            frames_upper_info_label->set_name ("AudioClockFramesUpperInfo");
            frames_lower_info_label->set_name ("AudioClockFramesLowerInfo");
            smpte_upper_info_label->set_name ("AudioClockSMPTEUpperInfo");
            smpte_lower_info_label->set_name ("AudioClockSMPTELowerInfo");
            bbt_upper_info_label->set_name ("AudioClockBBTUpperInfo");
            bbt_lower_info_label->set_name ("AudioClockBBTLowerInfo");

            Gtkmm2ext::set_size_request_to_display_given_text(*smpte_upper_info_label, "23.98",0,0);
            Gtkmm2ext::set_size_request_to_display_given_text(*smpte_lower_info_label, "NDF",0,0);

            Gtkmm2ext::set_size_request_to_display_given_text(*bbt_upper_info_label, "88|88",0,0);
            Gtkmm2ext::set_size_request_to_display_given_text(*bbt_lower_info_label, "888.88",0,0);

            frames_info_box.pack_start (*frames_upper_info_label, true, true);
            frames_info_box.pack_start (*frames_lower_info_label, true, true);
            smpte_info_box.pack_start (*smpte_upper_info_label, true, true);
            smpte_info_box.pack_start (*smpte_lower_info_label, true, true);
            bbt_info_box.pack_start (*bbt_upper_info_label, true, true);
            bbt_info_box.pack_start (*bbt_lower_info_label, true, true);
            
      } else {
            frames_upper_info_label = 0;
            frames_lower_info_label = 0;
            smpte_upper_info_label = 0;
            smpte_lower_info_label = 0;
            bbt_upper_info_label = 0;
            bbt_lower_info_label = 0;
      }     
      
      audio_frames_ebox.add (audio_frames_label);
      
      frames_packer.set_homogeneous (false);
      frames_packer.set_border_width (2);
      frames_packer.pack_start (audio_frames_ebox, false, false);
      
      if (with_info) {
            frames_packer.pack_start (frames_info_box, false, false, 5);
      }
      
      frames_packer_hbox.pack_start (frames_packer, true, false);

      hours_ebox.add (hours_label);
      minutes_ebox.add (minutes_label);
      seconds_ebox.add (seconds_label);
      frames_ebox.add (frames_label);
      bars_ebox.add (bars_label);
      beats_ebox.add (beats_label);
      ticks_ebox.add (ticks_label);
      ms_hours_ebox.add (ms_hours_label);
      ms_minutes_ebox.add (ms_minutes_label);
      ms_seconds_ebox.add (ms_seconds_label);

      smpte_packer.set_homogeneous (false);
      smpte_packer.set_border_width (2);
      smpte_packer.pack_start (hours_ebox, false, false);
      smpte_packer.pack_start (colon1, false, false);
      smpte_packer.pack_start (minutes_ebox, false, false);
      smpte_packer.pack_start (colon2, false, false);
      smpte_packer.pack_start (seconds_ebox, false, false);
      smpte_packer.pack_start (colon3, false, false);
      smpte_packer.pack_start (frames_ebox, false, false);

      if (with_info) {
            smpte_packer.pack_start (smpte_info_box, false, false, 5);
      }

      smpte_packer_hbox.pack_start (smpte_packer, true, false);

      bbt_packer.set_homogeneous (false);
      bbt_packer.set_border_width (2);
      bbt_packer.pack_start (bars_ebox, false, false);
      bbt_packer.pack_start (b1, false, false);
      bbt_packer.pack_start (beats_ebox, false, false);
      bbt_packer.pack_start (b2, false, false);
      bbt_packer.pack_start (ticks_ebox, false, false);

      if (with_info) {
            bbt_packer.pack_start (bbt_info_box, false, false, 5);
      }

      bbt_packer_hbox.pack_start (bbt_packer, true, false);

      minsec_packer.set_homogeneous (false);
      minsec_packer.set_border_width (2);
      minsec_packer.pack_start (ms_hours_ebox, false, false);
      minsec_packer.pack_start (colon4, false, false);
      minsec_packer.pack_start (ms_minutes_ebox, false, false);
      minsec_packer.pack_start (colon5, false, false);
      minsec_packer.pack_start (ms_seconds_ebox, false, false);

      minsec_packer_hbox.pack_start (minsec_packer, true, false);

      clock_frame.set_shadow_type (Gtk::SHADOW_IN);
      clock_frame.set_name ("BaseFrame");

      clock_frame.add (clock_base);

      set_widget_name (widget_name);

      _mode = BBT; /* lie to force mode switch */
      set_mode (SMPTE);

      pack_start (clock_frame, true, true);

      /* the clock base handles button releases for menu popup regardless of
         editable status. if the clock is editable, the clock base is where
         we pass focus to after leaving the last editable "field", which
         will then shutdown editing till the user starts it up again.

         it does this because the focus out event on the field disables
         keyboard event handling, and we don't connect anything up to
         notice focus in on the clock base. hence, keyboard event handling
         stays disabled.
      */

      clock_base.add_events (Gdk::BUTTON_PRESS_MASK|Gdk::BUTTON_RELEASE_MASK|Gdk::SCROLL_MASK);
      clock_base.signal_button_release_event().connect (bind (mem_fun (*this, &AudioClock::field_button_release_event), SMPTE_Hours));

      Session::SMPTEOffsetChanged.connect (mem_fun (*this, &AudioClock::smpte_offset_changed));

      if (editable) {
            setup_events ();
      }

      set (last_when, true);

      if (!is_transient) {
            clocks.push_back (this);
      }
}

void
AudioClock::set_widget_name (string name)
{
      Widget::set_name (name);

      clock_base.set_name (name);

      audio_frames_label.set_name (name);
      hours_label.set_name (name);
      minutes_label.set_name (name);
      seconds_label.set_name (name);
      frames_label.set_name (name);
      bars_label.set_name (name);
      beats_label.set_name (name);
      ticks_label.set_name (name);
      ms_hours_label.set_name (name);
      ms_minutes_label.set_name (name);
      ms_seconds_label.set_name (name);
      hours_ebox.set_name (name);
      minutes_ebox.set_name (name);
      seconds_ebox.set_name (name);
      frames_ebox.set_name (name);
      audio_frames_ebox.set_name (name);
      bars_ebox.set_name (name);
      beats_ebox.set_name (name);
      ticks_ebox.set_name (name);
      ms_hours_ebox.set_name (name);
      ms_minutes_ebox.set_name (name);
      ms_seconds_ebox.set_name (name);
      
      colon1.set_name (name);
      colon2.set_name (name);
      colon3.set_name (name);
      colon4.set_name (name);
      colon5.set_name (name);
      b1.set_name (name);
      b2.set_name (name);

      queue_draw ();
}

void
AudioClock::setup_events ()
{
      clock_base.set_flags (Gtk::CAN_FOCUS);

      hours_ebox.add_events (Gdk::BUTTON_PRESS_MASK|Gdk::BUTTON_RELEASE_MASK|Gdk::KEY_PRESS_MASK|Gdk::KEY_RELEASE_MASK|Gdk::FOCUS_CHANGE_MASK|Gdk::POINTER_MOTION_MASK|Gdk::SCROLL_MASK);
      minutes_ebox.add_events (Gdk::BUTTON_PRESS_MASK|Gdk::BUTTON_RELEASE_MASK|Gdk::KEY_PRESS_MASK|Gdk::KEY_RELEASE_MASK|Gdk::FOCUS_CHANGE_MASK|Gdk::POINTER_MOTION_MASK|Gdk::SCROLL_MASK);
      seconds_ebox.add_events (Gdk::BUTTON_PRESS_MASK|Gdk::BUTTON_RELEASE_MASK|Gdk::KEY_PRESS_MASK|Gdk::KEY_RELEASE_MASK|Gdk::FOCUS_CHANGE_MASK|Gdk::POINTER_MOTION_MASK|Gdk::SCROLL_MASK);
      frames_ebox.add_events (Gdk::BUTTON_PRESS_MASK|Gdk::BUTTON_RELEASE_MASK|Gdk::KEY_PRESS_MASK|Gdk::KEY_RELEASE_MASK|Gdk::FOCUS_CHANGE_MASK|Gdk::POINTER_MOTION_MASK|Gdk::SCROLL_MASK);
      bars_ebox.add_events (Gdk::BUTTON_PRESS_MASK|Gdk::BUTTON_RELEASE_MASK|Gdk::KEY_PRESS_MASK|Gdk::KEY_RELEASE_MASK|Gdk::FOCUS_CHANGE_MASK|Gdk::POINTER_MOTION_MASK|Gdk::SCROLL_MASK);
      beats_ebox.add_events (Gdk::BUTTON_PRESS_MASK|Gdk::BUTTON_RELEASE_MASK|Gdk::KEY_PRESS_MASK|Gdk::KEY_RELEASE_MASK|Gdk::FOCUS_CHANGE_MASK|Gdk::POINTER_MOTION_MASK|Gdk::SCROLL_MASK);
      ticks_ebox.add_events (Gdk::BUTTON_PRESS_MASK|Gdk::BUTTON_RELEASE_MASK|Gdk::KEY_PRESS_MASK|Gdk::KEY_RELEASE_MASK|Gdk::FOCUS_CHANGE_MASK|Gdk::POINTER_MOTION_MASK|Gdk::SCROLL_MASK);
      ms_hours_ebox.add_events (Gdk::BUTTON_PRESS_MASK|Gdk::BUTTON_RELEASE_MASK|Gdk::KEY_PRESS_MASK|Gdk::KEY_RELEASE_MASK|Gdk::FOCUS_CHANGE_MASK|Gdk::POINTER_MOTION_MASK|Gdk::SCROLL_MASK);
      ms_minutes_ebox.add_events (Gdk::BUTTON_PRESS_MASK|Gdk::BUTTON_RELEASE_MASK|Gdk::KEY_PRESS_MASK|Gdk::KEY_RELEASE_MASK|Gdk::FOCUS_CHANGE_MASK|Gdk::POINTER_MOTION_MASK|Gdk::SCROLL_MASK);
      ms_seconds_ebox.add_events (Gdk::BUTTON_PRESS_MASK|Gdk::BUTTON_RELEASE_MASK|Gdk::KEY_PRESS_MASK|Gdk::KEY_RELEASE_MASK|Gdk::FOCUS_CHANGE_MASK|Gdk::POINTER_MOTION_MASK|Gdk::SCROLL_MASK);
      audio_frames_ebox.add_events (Gdk::BUTTON_PRESS_MASK|Gdk::BUTTON_RELEASE_MASK|Gdk::KEY_PRESS_MASK|Gdk::KEY_RELEASE_MASK|Gdk::FOCUS_CHANGE_MASK|Gdk::POINTER_MOTION_MASK|Gdk::SCROLL_MASK);

      hours_ebox.set_flags (Gtk::CAN_FOCUS);
      minutes_ebox.set_flags (Gtk::CAN_FOCUS);
      seconds_ebox.set_flags (Gtk::CAN_FOCUS);
      frames_ebox.set_flags (Gtk::CAN_FOCUS);
      audio_frames_ebox.set_flags (Gtk::CAN_FOCUS);
      bars_ebox.set_flags (Gtk::CAN_FOCUS);
      beats_ebox.set_flags (Gtk::CAN_FOCUS);
      ticks_ebox.set_flags (Gtk::CAN_FOCUS);
      ms_hours_ebox.set_flags (Gtk::CAN_FOCUS);
      ms_minutes_ebox.set_flags (Gtk::CAN_FOCUS);
      ms_seconds_ebox.set_flags (Gtk::CAN_FOCUS);

      hours_ebox.signal_motion_notify_event().connect (bind (mem_fun(*this, &AudioClock::field_motion_notify_event), SMPTE_Hours));
      minutes_ebox.signal_motion_notify_event().connect (bind (mem_fun(*this, &AudioClock::field_motion_notify_event), SMPTE_Minutes));
      seconds_ebox.signal_motion_notify_event().connect (bind (mem_fun(*this, &AudioClock::field_motion_notify_event), SMPTE_Seconds));
      frames_ebox.signal_motion_notify_event().connect (bind (mem_fun(*this, &AudioClock::field_motion_notify_event), SMPTE_Frames));
      audio_frames_ebox.signal_motion_notify_event().connect (bind (mem_fun(*this, &AudioClock::field_motion_notify_event), AudioFrames));
      bars_ebox.signal_motion_notify_event().connect (bind (mem_fun(*this, &AudioClock::field_motion_notify_event), Bars));
      beats_ebox.signal_motion_notify_event().connect (bind (mem_fun(*this, &AudioClock::field_motion_notify_event), Beats));
      ticks_ebox.signal_motion_notify_event().connect (bind (mem_fun(*this, &AudioClock::field_motion_notify_event), Ticks));
      ms_hours_ebox.signal_motion_notify_event().connect (bind (mem_fun(*this, &AudioClock::field_motion_notify_event), MS_Hours));
      ms_minutes_ebox.signal_motion_notify_event().connect (bind (mem_fun(*this, &AudioClock::field_motion_notify_event), MS_Minutes));
      ms_seconds_ebox.signal_motion_notify_event().connect (bind (mem_fun(*this, &AudioClock::field_motion_notify_event), MS_Seconds));

      hours_ebox.signal_button_press_event().connect (bind (mem_fun(*this, &AudioClock::field_button_press_event), SMPTE_Hours));
      minutes_ebox.signal_button_press_event().connect (bind (mem_fun(*this, &AudioClock::field_button_press_event), SMPTE_Minutes));
      seconds_ebox.signal_button_press_event().connect (bind (mem_fun(*this, &AudioClock::field_button_press_event), SMPTE_Seconds));
      frames_ebox.signal_button_press_event().connect (bind (mem_fun(*this, &AudioClock::field_button_press_event), SMPTE_Frames));
      audio_frames_ebox.signal_button_press_event().connect (bind (mem_fun(*this, &AudioClock::field_button_press_event), AudioFrames));
      bars_ebox.signal_button_press_event().connect (bind (mem_fun(*this, &AudioClock::field_button_press_event), Bars));
      beats_ebox.signal_button_press_event().connect (bind (mem_fun(*this, &AudioClock::field_button_press_event), Beats));
      ticks_ebox.signal_button_press_event().connect (bind (mem_fun(*this, &AudioClock::field_button_press_event), Ticks));
      ms_hours_ebox.signal_button_press_event().connect (bind (mem_fun(*this, &AudioClock::field_button_press_event), MS_Hours));
      ms_minutes_ebox.signal_button_press_event().connect (bind (mem_fun(*this, &AudioClock::field_button_press_event), MS_Minutes));
      ms_seconds_ebox.signal_button_press_event().connect (bind (mem_fun(*this, &AudioClock::field_button_press_event), MS_Seconds));

      hours_ebox.signal_button_release_event().connect (bind (mem_fun(*this, &AudioClock::field_button_release_event), SMPTE_Hours));
      minutes_ebox.signal_button_release_event().connect (bind (mem_fun(*this, &AudioClock::field_button_release_event), SMPTE_Minutes));
      seconds_ebox.signal_button_release_event().connect (bind (mem_fun(*this, &AudioClock::field_button_release_event), SMPTE_Seconds));
      frames_ebox.signal_button_release_event().connect (bind (mem_fun(*this, &AudioClock::field_button_release_event), SMPTE_Frames));
      audio_frames_ebox.signal_button_release_event().connect (bind (mem_fun(*this, &AudioClock::field_button_release_event), AudioFrames));
      bars_ebox.signal_button_release_event().connect (bind (mem_fun(*this, &AudioClock::field_button_release_event), Bars));
      beats_ebox.signal_button_release_event().connect (bind (mem_fun(*this, &AudioClock::field_button_release_event), Beats));
      ticks_ebox.signal_button_release_event().connect (bind (mem_fun(*this, &AudioClock::field_button_release_event), Ticks));
      ms_hours_ebox.signal_button_release_event().connect (bind (mem_fun(*this, &AudioClock::field_button_release_event), MS_Hours));
      ms_minutes_ebox.signal_button_release_event().connect (bind (mem_fun(*this, &AudioClock::field_button_release_event), MS_Minutes));
      ms_seconds_ebox.signal_button_release_event().connect (bind (mem_fun(*this, &AudioClock::field_button_release_event), MS_Seconds));

      hours_ebox.signal_scroll_event().connect (bind (mem_fun(*this, &AudioClock::field_button_scroll_event), SMPTE_Hours));
      minutes_ebox.signal_scroll_event().connect (bind (mem_fun(*this, &AudioClock::field_button_scroll_event), SMPTE_Minutes));
      seconds_ebox.signal_scroll_event().connect (bind (mem_fun(*this, &AudioClock::field_button_scroll_event), SMPTE_Seconds));
      frames_ebox.signal_scroll_event().connect (bind (mem_fun(*this, &AudioClock::field_button_scroll_event), SMPTE_Frames));
      audio_frames_ebox.signal_scroll_event().connect (bind (mem_fun(*this, &AudioClock::field_button_scroll_event), AudioFrames));
      bars_ebox.signal_scroll_event().connect (bind (mem_fun(*this, &AudioClock::field_button_scroll_event), Bars));
      beats_ebox.signal_scroll_event().connect (bind (mem_fun(*this, &AudioClock::field_button_scroll_event), Beats));
      ticks_ebox.signal_scroll_event().connect (bind (mem_fun(*this, &AudioClock::field_button_scroll_event), Ticks));
      ms_hours_ebox.signal_scroll_event().connect (bind (mem_fun(*this, &AudioClock::field_button_scroll_event), MS_Hours));
      ms_minutes_ebox.signal_scroll_event().connect (bind (mem_fun(*this, &AudioClock::field_button_scroll_event), MS_Minutes));
      ms_seconds_ebox.signal_scroll_event().connect (bind (mem_fun(*this, &AudioClock::field_button_scroll_event), MS_Seconds));

      hours_ebox.signal_key_press_event().connect (bind (mem_fun(*this, &AudioClock::field_key_press_event), SMPTE_Hours));
      minutes_ebox.signal_key_press_event().connect (bind (mem_fun(*this, &AudioClock::field_key_press_event), SMPTE_Minutes));
      seconds_ebox.signal_key_press_event().connect (bind (mem_fun(*this, &AudioClock::field_key_press_event), SMPTE_Seconds));
      frames_ebox.signal_key_press_event().connect (bind (mem_fun(*this, &AudioClock::field_key_press_event), SMPTE_Frames));
      audio_frames_ebox.signal_key_press_event().connect (bind (mem_fun(*this, &AudioClock::field_key_press_event), AudioFrames));
      bars_ebox.signal_key_press_event().connect (bind (mem_fun(*this, &AudioClock::field_key_press_event), Bars));
      beats_ebox.signal_key_press_event().connect (bind (mem_fun(*this, &AudioClock::field_key_press_event), Beats));
      ticks_ebox.signal_key_press_event().connect (bind (mem_fun(*this, &AudioClock::field_key_press_event), Ticks));
      ms_hours_ebox.signal_key_press_event().connect (bind (mem_fun(*this, &AudioClock::field_key_press_event), MS_Hours));
      ms_minutes_ebox.signal_key_press_event().connect (bind (mem_fun(*this, &AudioClock::field_key_press_event), MS_Minutes));
      ms_seconds_ebox.signal_key_press_event().connect (bind (mem_fun(*this, &AudioClock::field_key_press_event), MS_Seconds));

      hours_ebox.signal_key_release_event().connect (bind (mem_fun(*this, &AudioClock::field_key_release_event), SMPTE_Hours));
      minutes_ebox.signal_key_release_event().connect (bind (mem_fun(*this, &AudioClock::field_key_release_event), SMPTE_Minutes));
      seconds_ebox.signal_key_release_event().connect (bind (mem_fun(*this, &AudioClock::field_key_release_event), SMPTE_Seconds));
      frames_ebox.signal_key_release_event().connect (bind (mem_fun(*this, &AudioClock::field_key_release_event), SMPTE_Frames));
      audio_frames_ebox.signal_key_release_event().connect (bind (mem_fun(*this, &AudioClock::field_key_release_event), AudioFrames));
      bars_ebox.signal_key_release_event().connect (bind (mem_fun(*this, &AudioClock::field_key_release_event), Bars));
      beats_ebox.signal_key_release_event().connect (bind (mem_fun(*this, &AudioClock::field_key_release_event), Beats));
      ticks_ebox.signal_key_release_event().connect (bind (mem_fun(*this, &AudioClock::field_key_release_event), Ticks));
      ms_hours_ebox.signal_key_release_event().connect (bind (mem_fun(*this, &AudioClock::field_key_release_event), MS_Hours));
      ms_minutes_ebox.signal_key_release_event().connect (bind (mem_fun(*this, &AudioClock::field_key_release_event), MS_Minutes));
      ms_seconds_ebox.signal_key_release_event().connect (bind (mem_fun(*this, &AudioClock::field_key_release_event), MS_Seconds));

      hours_ebox.signal_focus_in_event().connect (bind (mem_fun(*this, &AudioClock::field_focus_in_event), SMPTE_Hours));
      minutes_ebox.signal_focus_in_event().connect (bind (mem_fun(*this, &AudioClock::field_focus_in_event), SMPTE_Minutes));
      seconds_ebox.signal_focus_in_event().connect (bind (mem_fun(*this, &AudioClock::field_focus_in_event), SMPTE_Seconds));
      frames_ebox.signal_focus_in_event().connect (bind (mem_fun(*this, &AudioClock::field_focus_in_event), SMPTE_Frames));
      audio_frames_ebox.signal_focus_in_event().connect (bind (mem_fun(*this, &AudioClock::field_focus_in_event), AudioFrames));
      bars_ebox.signal_focus_in_event().connect (bind (mem_fun(*this, &AudioClock::field_focus_in_event), Bars));
      beats_ebox.signal_focus_in_event().connect (bind (mem_fun(*this, &AudioClock::field_focus_in_event), Beats));
      ticks_ebox.signal_focus_in_event().connect (bind (mem_fun(*this, &AudioClock::field_focus_in_event), Ticks));
      ms_hours_ebox.signal_focus_in_event().connect (bind (mem_fun(*this, &AudioClock::field_focus_in_event), MS_Hours));
      ms_minutes_ebox.signal_focus_in_event().connect (bind (mem_fun(*this, &AudioClock::field_focus_in_event), MS_Minutes));
      ms_seconds_ebox.signal_focus_in_event().connect (bind (mem_fun(*this, &AudioClock::field_focus_in_event), MS_Seconds));

      hours_ebox.signal_focus_out_event().connect (bind (mem_fun(*this, &AudioClock::field_focus_out_event), SMPTE_Hours));
      minutes_ebox.signal_focus_out_event().connect (bind (mem_fun(*this, &AudioClock::field_focus_out_event), SMPTE_Minutes));
      seconds_ebox.signal_focus_out_event().connect (bind (mem_fun(*this, &AudioClock::field_focus_out_event), SMPTE_Seconds));
      frames_ebox.signal_focus_out_event().connect (bind (mem_fun(*this, &AudioClock::field_focus_out_event), SMPTE_Frames));
      audio_frames_ebox.signal_focus_out_event().connect (bind (mem_fun(*this, &AudioClock::field_focus_out_event), AudioFrames));
      bars_ebox.signal_focus_out_event().connect (bind (mem_fun(*this, &AudioClock::field_focus_out_event), Bars));
      beats_ebox.signal_focus_out_event().connect (bind (mem_fun(*this, &AudioClock::field_focus_out_event), Beats));
      ticks_ebox.signal_focus_out_event().connect (bind (mem_fun(*this, &AudioClock::field_focus_out_event), Ticks));
      ms_hours_ebox.signal_focus_out_event().connect (bind (mem_fun(*this, &AudioClock::field_focus_out_event), MS_Hours));
      ms_minutes_ebox.signal_focus_out_event().connect (bind (mem_fun(*this, &AudioClock::field_focus_out_event), MS_Minutes));
      ms_seconds_ebox.signal_focus_out_event().connect (bind (mem_fun(*this, &AudioClock::field_focus_out_event), MS_Seconds));

      clock_base.signal_focus_in_event().connect (mem_fun (*this, &AudioClock::drop_focus_handler));
}

bool
AudioClock::drop_focus_handler (GdkEventFocus* ignored)
{
      Keyboard::magic_widget_drop_focus ();
      return false;
}

void
AudioClock::on_realize ()
{
      HBox::on_realize ();

      /* styles are not available until the widgets are bound to a window */

      set_size_requests ();
}

void
AudioClock::set (nframes_t when, bool force, nframes_t offset, int which)
{

      if ((!force && !is_visible()) || session == 0) {
            return;
      }
      
      if (when == last_when && !offset && !force) {
            return;
      }

      bool pdelta = Config->get_primary_clock_delta_edit_cursor();
      bool sdelta = Config->get_secondary_clock_delta_edit_cursor();

      if (offset && which == 1 && pdelta) {
            when = (when > offset) ? when - offset : offset - when;
      } else if (offset && which == 2 && sdelta) {
            when = (when > offset) ? when - offset : offset - when;
      }

      if (which == 1 && pdelta && !last_pdelta) {
            set_widget_name("TransportClockDisplayDelta");
            last_pdelta = true;
      } else if (which == 1 && !pdelta && last_pdelta) {
            set_widget_name("TransportClockDisplay");
            last_pdelta = false;
      } else if (which == 2  && sdelta && !last_sdelta) {
            set_widget_name("SecondaryClockDisplayDelta");
            last_sdelta = true;
      } else if (which == 2 && !sdelta && last_sdelta) {
            set_widget_name("SecondaryClockDisplay");
            last_sdelta = false;
      }

      switch (_mode) {
      case SMPTE:
            set_smpte (when, force);
            break;

      case BBT:
            set_bbt (when, force);
            break;

      case MinSec:
            set_minsec (when, force);
            break;

      case Frames:
            set_frames (when, force);
            break;

      case Off:
            break;
      }

      last_when = when;
}

void
AudioClock::smpte_offset_changed ()
{
      nframes_t current;

      switch (_mode) {
      case SMPTE:
            if (is_duration) {
                  current = current_duration();
            } else {
                  current = current_time ();
            }
            set (current, true);
            break;
      default:
            break;
      }
}

void
AudioClock::set_frames (nframes_t when, bool force)
{
      char buf[32];
      snprintf (buf, sizeof (buf), "%u", when);
      audio_frames_label.set_text (buf);
      
      if (frames_upper_info_label) {
            nframes_t rate = session->frame_rate();
            
            if (fmod (rate, 1000.0) == 0.000) {
                  sprintf (buf, "%uK", rate/1000);
            } else {
                  sprintf (buf, "%.3fK", rate/1000.0f);
            }
            
            if (frames_upper_info_label->get_text() != buf) {
                  frames_upper_info_label->set_text (buf);
            }
            
            float vid_pullup = Config->get_video_pullup();
            
            if (vid_pullup == 0.0) {
                  if (frames_lower_info_label->get_text () != _("none")) {
                        frames_lower_info_label->set_text(_("none"));
                  }
            } else {
                  sprintf (buf, "%-6.4f", vid_pullup);
                  if (frames_lower_info_label->get_text() != buf) {
                        frames_lower_info_label->set_text (buf);
                  }
            }
      }
}     

void
AudioClock::set_minsec (nframes_t when, bool force)
{
      char buf[32];
      nframes_t left;
      int hrs;
      int mins;
      float secs;
      
      left = when;
      hrs = (int) floor (left / (session->frame_rate() * 60.0f * 60.0f));
      left -= (nframes_t) floor (hrs * session->frame_rate() * 60.0f * 60.0f);
      mins = (int) floor (left / (session->frame_rate() * 60.0f));
      left -= (nframes_t) floor (mins * session->frame_rate() * 60.0f);
      secs = left / (float) session->frame_rate();

      if (force || hrs != ms_last_hrs) {
            sprintf (buf, "%02d", hrs);
            ms_hours_label.set_text (buf);
            ms_last_hrs = hrs;
      }

      if (force || mins != ms_last_mins) {
            sprintf (buf, "%02d", mins);
            ms_minutes_label.set_text (buf);
            ms_last_mins = mins;
      }

      if (force || secs != ms_last_secs) {
            sprintf (buf, "%06.3f", secs);
            ms_seconds_label.set_text (buf);
            ms_last_secs = secs;
      }
}

void
AudioClock::set_smpte (nframes_t when, bool force)
{
      char buf[32];
      SMPTE::Time smpte;
      
      if (is_duration) {
            session->smpte_duration (when, smpte);
      } else {
            session->smpte_time (when, smpte);
      }

      if (force || smpte.hours != last_hrs || smpte.negative != last_negative) {
            if (smpte.negative) {
                  sprintf (buf, "-%02" PRIu32, smpte.hours);
            } else {
                  sprintf (buf, " %02" PRIu32, smpte.hours);
            }
            hours_label.set_text (buf);
            last_hrs = smpte.hours;
            last_negative = smpte.negative;
      }

      if (force || smpte.minutes != last_mins) {
            sprintf (buf, "%02" PRIu32, smpte.minutes);
            minutes_label.set_text (buf);
            last_mins = smpte.minutes;
      }

      if (force || smpte.seconds != last_secs) {
            sprintf (buf, "%02" PRIu32, smpte.seconds);
            seconds_label.set_text (buf);
            last_secs = smpte.seconds;
      }

      if (force || smpte.frames != last_frames) {
            sprintf (buf, "%02" PRIu32, smpte.frames);
            frames_label.set_text (buf);
            last_frames = smpte.frames;
      }
      
      if (smpte_upper_info_label) {
            double smpte_frames = session->smpte_frames_per_second();
            
            if ( fmod(smpte_frames, 1.0) == 0.0) {
                  sprintf (buf, "%u", int (smpte_frames)); 
            } else {
                  sprintf (buf, "%.2f", smpte_frames);
            }
            
            if (smpte_upper_info_label->get_text() != buf) {
                  smpte_upper_info_label->set_text (buf);
            }
            
            if ((fabs(smpte_frames - 29.97) < 0.0001) || smpte_frames == 30) {
                  if (session->smpte_drop_frames()) {
                        sprintf (buf, "DF");
                  } else {
                        sprintf (buf, "NDF");
                  }
            } else {
                  // there is no drop frame alternative
                  buf[0] = '\0';
            }
            
            if (smpte_lower_info_label->get_text() != buf) {
                  smpte_lower_info_label->set_text (buf);
            }
      }
}

void
AudioClock::set_bbt (nframes_t when, bool force)
{
      char buf[16];
      BBT_Time bbt;

      /* handle a common case */
      if (is_duration) {
            if (when == 0) {
                  bbt.bars = 0;
                  bbt.beats = 0;
                  bbt.ticks = 0;    
            } else {
                  session->tempo_map().bbt_time (when, bbt);
                  bbt.bars--;
                  bbt.beats--;
            }
      } else {
            session->tempo_map().bbt_time (when, bbt);
      }

      sprintf (buf, "%03" PRIu32, bbt.bars);
      if (force || bars_label.get_text () != buf) {
            bars_label.set_text (buf);
      }
      sprintf (buf, "%02" PRIu32, bbt.beats);
      if (force || beats_label.get_text () != buf) {
            beats_label.set_text (buf);
      }
      sprintf (buf, "%04" PRIu32, bbt.ticks);
      if (force || ticks_label.get_text () != buf) {
            ticks_label.set_text (buf);
      }
      
      if (bbt_upper_info_label) {
            nframes64_t pos;

            if (bbt_reference_time < 0) {
                  pos = when;
            } else {
                  pos = bbt_reference_time;
            }

            TempoMap::Metric m (session->tempo_map().metric_at (pos));

            sprintf (buf, "%-5.2f", m.tempo().beats_per_minute());
            if (bbt_lower_info_label->get_text() != buf) {
                  bbt_lower_info_label->set_text (buf);
            }
            sprintf (buf, "%g|%g", m.meter().beats_per_bar(), m.meter().note_divisor());
            if (bbt_upper_info_label->get_text() != buf) {
                  bbt_upper_info_label->set_text (buf);
            }
      }
}

void
AudioClock::set_session (Session *s)
{
      session = s;

      if (s) {

            XMLProperty* prop;
            XMLNode* node = session->extra_xml (X_("ClockModes"));
            AudioClock::Mode amode;
            
            if (node) {
                  if ((prop = node->property (_name)) != 0) {
                        amode = AudioClock::Mode (string_2_enum (prop->value(), amode));
                        set_mode (amode);
                  }
            }

            set (last_when, true);
      }
}

void
AudioClock::focus ()
{
      switch (_mode) {
      case SMPTE:
            hours_ebox.grab_focus ();
            break;

      case BBT:
            bars_ebox.grab_focus ();
            break;

      case MinSec:
            ms_hours_ebox.grab_focus ();
            break;

      case Frames:
            frames_ebox.grab_focus ();
            break;

      case Off:
            break;
      }
}


bool
AudioClock::field_key_press_event (GdkEventKey *ev, Field field)
{
      /* all key activity is handled on key release */
      return true;
}

bool
AudioClock::field_key_release_event (GdkEventKey *ev, Field field)
{
      Label *label = 0;
      string new_text;
      char new_char = 0;
      bool move_on = false;

      switch (field) {
      case SMPTE_Hours:
            label = &hours_label;
            break;
      case SMPTE_Minutes:
            label = &minutes_label;
            break;
      case SMPTE_Seconds:
            label = &seconds_label;
            break;
      case SMPTE_Frames:
            label = &frames_label;
            break;

      case AudioFrames:
            label = &audio_frames_label;
            break;

      case MS_Hours:
            label = &ms_hours_label;
            break;
      case MS_Minutes:
            label = &ms_minutes_label;
            break;
      case MS_Seconds:
            label = &ms_seconds_label;
            break;

      case Bars:
            label = &bars_label;
            break;
      case Beats:
            label = &beats_label;
            break;
      case Ticks:
            label = &ticks_label;
            break;
      default:
            return false;
      }

      switch (ev->keyval) {
      case GDK_0:
      case GDK_KP_0:
            new_char = '0';
            break;
      case GDK_1:
      case GDK_KP_1:
            new_char = '1';
            break;
      case GDK_2:
      case GDK_KP_2:
            new_char = '2';
            break;
      case GDK_3:
      case GDK_KP_3:
            new_char = '3';
            break;
      case GDK_4:
      case GDK_KP_4:
            new_char = '4';
            break;
      case GDK_5:
      case GDK_KP_5:
            new_char = '5';
            break;
      case GDK_6:
      case GDK_KP_6:
            new_char = '6';
            break;
      case GDK_7:
      case GDK_KP_7:
            new_char = '7';
            break;
      case GDK_8:
      case GDK_KP_8:
            new_char = '8';
            break;
      case GDK_9:
      case GDK_KP_9:
            new_char = '9';
            break;

      case GDK_period:
      case GDK_KP_Decimal:
            if (_mode == MinSec && field == MS_Seconds) {
                  new_char = '.';
            } else {
                  return false;
            }
            break;

      case GDK_Tab:
      case GDK_Return:
      case GDK_KP_Enter:
            move_on = true;
            break;

      case GDK_Escape:
            key_entry_state = 0;
            clock_base.grab_focus ();
            ChangeAborted();  /*  EMIT SIGNAL  */
            return true;

      default:
            return false;
      }

      if (!move_on) {

            if (key_entry_state == 0) {

                  /* initialize with a fresh new string */

                  if (field != AudioFrames) {
                        for (uint32_t xn = 0; xn < field_length[field] - 1; ++xn) {
                              new_text += '0';
                        }
                  } else {
                        new_text = "";
                  }

            } else {

                  string existing = label->get_text();
                  if (existing.length() >= field_length[field]) {
                        new_text = existing.substr (1, field_length[field] - 1);
                  } else {
                        new_text = existing.substr (0, field_length[field] - 1);
                  }
            }

            new_text += new_char;
            label->set_text (new_text);
            key_entry_state++;
      }

      if (key_entry_state == field_length[field]) {
            move_on = true;
      }
      
      if (move_on) {

            if (key_entry_state) {
      
                  switch (field) {
                  case SMPTE_Hours:
                  case SMPTE_Minutes:
                  case SMPTE_Seconds:
                  case SMPTE_Frames:
                        // Check SMPTE fields for sanity (may also adjust fields)
                        smpte_sanitize_display();
                        break;
                  case Bars:
                  case Beats:
                  case Ticks:
                        // Bars should never be, unless this clock is for a duration
                        if (atoi(bars_label.get_text()) == 0 && !is_duration) {
                              bars_label.set_text("001");
                        }
                        //  beats should never be 0, unless this clock is for a duration
                        if (atoi(beats_label.get_text()) == 0 && !is_duration) {
                              beats_label.set_text("01");
                        }
                        break;
                  default:
                        break;
                  }
                  
                  ValueChanged(); /* EMIT_SIGNAL */
            }
            
            /* move on to the next field.
             */
            
            switch (field) {
                  
                  /* SMPTE */
                  
            case SMPTE_Hours:
                  minutes_ebox.grab_focus ();
                  break;
            case SMPTE_Minutes:
                  seconds_ebox.grab_focus ();
                  break;
            case SMPTE_Seconds:
                  frames_ebox.grab_focus ();
                  break;
            case SMPTE_Frames:
                  clock_base.grab_focus ();
                  break;

            /* audio frames */
            case AudioFrames:
                  clock_base.grab_focus ();
                  break;

            /* Min:Sec */

            case MS_Hours:
                  ms_minutes_ebox.grab_focus ();
                  break;
            case MS_Minutes:
                  ms_seconds_ebox.grab_focus ();
                  break;
            case MS_Seconds:
                  clock_base.grab_focus ();
                  break;

            /* BBT */

            case Bars:
                  beats_ebox.grab_focus ();
                  break;
            case Beats:
                  ticks_ebox.grab_focus ();
                  break;
            case Ticks:
                  clock_base.grab_focus ();
                  break;

            default:
                  break;
            }

      }

      //if user hit Enter, lose focus
      switch (ev->keyval) {
      case GDK_Return:
      case GDK_KP_Enter:
            clock_base.grab_focus ();
      }

      return true;
}

bool
AudioClock::field_focus_in_event (GdkEventFocus *ev, Field field)
{
      key_entry_state = 0;

      Keyboard::magic_widget_grab_focus ();

      switch (field) {
      case SMPTE_Hours:
            hours_ebox.set_flags (Gtk::HAS_FOCUS);
            hours_ebox.set_state (Gtk::STATE_ACTIVE);
            break;
      case SMPTE_Minutes:
            minutes_ebox.set_flags (Gtk::HAS_FOCUS);
            minutes_ebox.set_state (Gtk::STATE_ACTIVE);
            break;
      case SMPTE_Seconds:
            seconds_ebox.set_flags (Gtk::HAS_FOCUS);
            seconds_ebox.set_state (Gtk::STATE_ACTIVE);
            break;
      case SMPTE_Frames:
            frames_ebox.set_flags (Gtk::HAS_FOCUS);
            frames_ebox.set_state (Gtk::STATE_ACTIVE);
            break;

      case AudioFrames:
            audio_frames_ebox.set_flags (Gtk::HAS_FOCUS);
            audio_frames_ebox.set_state (Gtk::STATE_ACTIVE);
            break;

      case MS_Hours:
            ms_hours_ebox.set_flags (Gtk::HAS_FOCUS);
            ms_hours_ebox.set_state (Gtk::STATE_ACTIVE);
            break;
      case MS_Minutes:
            ms_minutes_ebox.set_flags (Gtk::HAS_FOCUS);
            ms_minutes_ebox.set_state (Gtk::STATE_ACTIVE);
            break;
      case MS_Seconds:
            ms_seconds_ebox.set_flags (Gtk::HAS_FOCUS);
            ms_seconds_ebox.set_state (Gtk::STATE_ACTIVE);
            break;
      case Bars:
            bars_ebox.set_flags (Gtk::HAS_FOCUS);
            bars_ebox.set_state (Gtk::STATE_ACTIVE);
            break;
      case Beats:
            beats_ebox.set_flags (Gtk::HAS_FOCUS);
            beats_ebox.set_state (Gtk::STATE_ACTIVE);
            break;
      case Ticks:
            ticks_ebox.set_flags (Gtk::HAS_FOCUS);
            ticks_ebox.set_state (Gtk::STATE_ACTIVE);
            break;
      }

      return false;
}

bool
AudioClock::field_focus_out_event (GdkEventFocus *ev, Field field)
{
      switch (field) {

      case SMPTE_Hours:
            hours_ebox.unset_flags (Gtk::HAS_FOCUS);
            hours_ebox.set_state (Gtk::STATE_NORMAL);
            break;
      case SMPTE_Minutes:
            minutes_ebox.unset_flags (Gtk::HAS_FOCUS);
            minutes_ebox.set_state (Gtk::STATE_NORMAL);
            break;
      case SMPTE_Seconds:
            seconds_ebox.unset_flags (Gtk::HAS_FOCUS);
            seconds_ebox.set_state (Gtk::STATE_NORMAL);
            break;
      case SMPTE_Frames:
            frames_ebox.unset_flags (Gtk::HAS_FOCUS);
            frames_ebox.set_state (Gtk::STATE_NORMAL);
            break;

      case AudioFrames:
            audio_frames_ebox.unset_flags (Gtk::HAS_FOCUS);
            audio_frames_ebox.set_state (Gtk::STATE_NORMAL);
            break;

      case MS_Hours:
            ms_hours_ebox.unset_flags (Gtk::HAS_FOCUS);
            ms_hours_ebox.set_state (Gtk::STATE_NORMAL);
            break;
      case MS_Minutes:
            ms_minutes_ebox.unset_flags (Gtk::HAS_FOCUS);
            ms_minutes_ebox.set_state (Gtk::STATE_NORMAL);
            break;
      case MS_Seconds:
            ms_seconds_ebox.unset_flags (Gtk::HAS_FOCUS);
            ms_seconds_ebox.set_state (Gtk::STATE_NORMAL);
            break;

      case Bars:
            bars_ebox.unset_flags (Gtk::HAS_FOCUS);
            bars_ebox.set_state (Gtk::STATE_NORMAL);
            break;
      case Beats:
            beats_ebox.unset_flags (Gtk::HAS_FOCUS);
            beats_ebox.set_state (Gtk::STATE_NORMAL);
            break;
      case Ticks:
            ticks_ebox.unset_flags (Gtk::HAS_FOCUS);
            ticks_ebox.set_state (Gtk::STATE_NORMAL);
            break;
      }

      Keyboard::magic_widget_drop_focus ();

      return false;
}

bool
AudioClock::field_button_release_event (GdkEventButton *ev, Field field)
{
      if (dragging) {
            gdk_pointer_ungrab (GDK_CURRENT_TIME);
            dragging = false;
            if (ev->y > drag_start_y+1 || ev->y < drag_start_y-1 || Keyboard::modifier_state_equals (ev->state, Keyboard::TertiaryModifier)){
                  // we actually dragged so return without setting editing focus, or we shift clicked
                  return true;
            }
      }

      if (!editable) {
            if (ops_menu == 0) {
                  build_ops_menu ();
            }
            ops_menu->popup (1, ev->time);
            return true;
      }

      if (Keyboard::is_context_menu_event (ev)) {
            if (ops_menu == 0) {
                  build_ops_menu ();
            }
            ops_menu->popup (1, ev->time);
            return true;
      } 

      switch (ev->button) {
      case 1:
            switch (field) {
            case SMPTE_Hours:
                  hours_ebox.grab_focus();
                  break;
            case SMPTE_Minutes:
                  minutes_ebox.grab_focus();
                  break;
            case SMPTE_Seconds:
                  seconds_ebox.grab_focus();
                  break;
            case SMPTE_Frames:
                  frames_ebox.grab_focus();
                  break;

            case AudioFrames:
                  audio_frames_ebox.grab_focus();
                  break;
                  
            case MS_Hours:
                  ms_hours_ebox.grab_focus();
                  break;
            case MS_Minutes:
                  ms_minutes_ebox.grab_focus();
                  break;
            case MS_Seconds:
                  ms_seconds_ebox.grab_focus();
                  break;
                  
            case Bars:
                  bars_ebox.grab_focus ();
                  break;
            case Beats:
                  beats_ebox.grab_focus ();
                  break;
            case Ticks:
                  ticks_ebox.grab_focus ();
                  break;
            }
            break;
            
      default:
            break;
      }

      return true;
}

bool
AudioClock::field_button_press_event (GdkEventButton *ev, Field field)
{
      if (session == 0) return false;

      nframes_t frames = 0;

      switch (ev->button) {
      case 1:
            if (Keyboard::modifier_state_equals (ev->state, Keyboard::TertiaryModifier)) {
                  set (frames, true);
                  ValueChanged (); /* EMIT_SIGNAL */
                              }
      
                /* make absolutely sure that the pointer is grabbed */
            gdk_pointer_grab(ev->window,false ,
                         GdkEventMask( Gdk::POINTER_MOTION_MASK | Gdk::BUTTON_PRESS_MASK |Gdk::BUTTON_RELEASE_MASK), 
                         NULL,NULL,ev->time);
            dragging = true;
            drag_accum = 0;
            drag_start_y = ev->y;
            drag_y = ev->y;
            break;

      case 2:
            if (Keyboard::modifier_state_equals (ev->state, Keyboard::TertiaryModifier)) {
                  set (frames, true);
                  ValueChanged (); /* EMIT_SIGNAL */
            }
            break;

      case 3:
            /* used for context sensitive menu */
            return false;
            break;

      default:
            return false;
            break;
      }
      
      return true;
}

bool
AudioClock::field_button_scroll_event (GdkEventScroll *ev, Field field)
{
      if (session == 0) {
            return false;
      }

      nframes_t frames = 0;

      switch (ev->direction) {

      case GDK_SCROLL_UP:
             frames = get_frames (field);
             if (frames != 0) {
                  if (Keyboard::modifier_state_equals (ev->state, Keyboard::PrimaryModifier)) {
                       frames *= 10;
                  }
                  set (current_time() + frames, true);
                  ValueChanged (); /* EMIT_SIGNAL */
             }
             break;

      case GDK_SCROLL_DOWN:
             frames = get_frames (field);
             if (frames != 0) {
                  if (Keyboard::modifier_state_equals (ev->state, Keyboard::PrimaryModifier)) {
                       frames *= 10;
                  }
                  
                  if ((double)current_time() - (double)frames < 0.0) {
                       set (0, true);
                  } else {
                       set (current_time() - frames, true);
                  }
                  
                  ValueChanged (); /* EMIT_SIGNAL */
             }
             break;

      default:
            return false;
            break;
      }
      
      return true;
}

bool
AudioClock::field_motion_notify_event (GdkEventMotion *ev, Field field)
{
      if (session == 0 || !dragging) {
            return false;
      }
      
      float pixel_frame_scale_factor = 0.2f;

/*
      if (Keyboard::modifier_state_equals (ev->state, Keyboard::PrimaryModifier))  {
            pixel_frame_scale_factor = 0.1f;
      }


      if (Keyboard::modifier_state_contains (ev->state, 
                                     Keyboard::PrimaryModifier|Keyboard::SecondaryModifier)) {

            pixel_frame_scale_factor = 0.025f;
      }
*/
      double y_delta = ev->y - drag_y;

      drag_accum +=  y_delta*pixel_frame_scale_factor;

      drag_y = ev->y;

      if (trunc(drag_accum) != 0) {

            nframes_t frames;
            nframes_t pos ;
            int dir;
            dir = (drag_accum < 0 ? 1:-1);
            pos = current_time();
            frames = get_frames (field,pos,dir);
            
            if (frames  != 0 &&  frames * drag_accum < current_time()) {
            
                  set ((nframes_t) floor (pos - drag_accum * frames), false); // minus because up is negative in computer-land
            
            } else {
                  set (0 , false);
            
            }

                  drag_accum= 0;
            ValueChanged();    /* EMIT_SIGNAL */      
            

      }

      return true;
}

nframes_t
AudioClock::get_frames (Field field,nframes_t pos,int dir)
{

      nframes_t frames = 0;
      BBT_Time bbt;
      switch (field) {
      case SMPTE_Hours:
            frames = (nframes_t) floor (3600.0 * session->frame_rate());
            break;
      case SMPTE_Minutes:
            frames = (nframes_t) floor (60.0 * session->frame_rate());
            break;
      case SMPTE_Seconds:
            frames = session->frame_rate();
            break;
      case SMPTE_Frames:
            frames = (nframes_t) floor (session->frame_rate() / session->smpte_frames_per_second());
            break;

      case AudioFrames:
            frames = 1;
            break;

      case MS_Hours:
            frames = (nframes_t) floor (3600.0 * session->frame_rate());
            break;
      case MS_Minutes:
            frames = (nframes_t) floor (60.0 * session->frame_rate());
            break;
      case MS_Seconds:
            frames = session->frame_rate();
            break;

      case Bars:
            bbt.bars = 1;
            bbt.beats = 0;
            bbt.ticks = 0;
            frames = session->tempo_map().bbt_duration_at(pos,bbt,dir);
            break;
      case Beats:
            bbt.bars = 0;
            bbt.beats = 1;
            bbt.ticks = 0;
            frames = session->tempo_map().bbt_duration_at(pos,bbt,dir);
            break;
      case Ticks:
            bbt.bars = 0;
            bbt.beats = 0;
            bbt.ticks = 1;
            frames = session->tempo_map().bbt_duration_at(pos,bbt,dir);
            break;
      }

      return frames;
}

nframes_t
AudioClock::current_time (nframes_t pos) const
{
      nframes_t ret = 0;

      switch (_mode) {
      case SMPTE:
            ret = smpte_frame_from_display ();
            break;
      case BBT:
            ret = bbt_frame_from_display (pos);
            break;

      case MinSec:
            ret = minsec_frame_from_display ();
            break;

      case Frames:
            ret = audio_frame_from_display ();
            break;

      case Off:
            break;
      }

      return ret;
}

nframes_t
AudioClock::current_duration (nframes_t pos) const
{
      nframes_t ret = 0;

      switch (_mode) {
      case SMPTE:
            ret = smpte_frame_from_display ();
            break;
      case BBT:
            ret = bbt_frame_duration_from_display (pos);
            break;

      case MinSec:
            ret = minsec_frame_from_display ();
            break;

      case Frames:
            ret = audio_frame_from_display ();
            break;

      case Off:
            break;
      }

      return ret;
}

void
AudioClock::smpte_sanitize_display()
{
      // Check SMPTE fields for sanity, possibly adjusting values
      if (atoi(minutes_label.get_text()) > 59) {
            minutes_label.set_text("59");
      }
      
      if (atoi(seconds_label.get_text()) > 59) {
            seconds_label.set_text("59");
      }
      
      switch ((long)rint(session->smpte_frames_per_second())) {
      case 24:
            if (atoi(frames_label.get_text()) > 23) {
                  frames_label.set_text("23");
            }
            break;
      case 25:
            if (atoi(frames_label.get_text()) > 24) {
                  frames_label.set_text("24");
            }
            break;
      case 30:
            if (atoi(frames_label.get_text()) > 29) {
                  frames_label.set_text("29");
            }
            break;
      default:
            break;
      }
      
      if (session->smpte_drop_frames()) {
            if ((atoi(minutes_label.get_text()) % 10) && (atoi(seconds_label.get_text()) == 0) && (atoi(frames_label.get_text()) < 2)) {
                  frames_label.set_text("02");
            }
      }
}

nframes_t
AudioClock::smpte_frame_from_display () const
{
      if (session == 0) {
            return 0;
      }
      
      SMPTE::Time smpte;
      nframes_t sample;
      
      smpte.hours = atoi (hours_label.get_text());
      smpte.minutes = atoi (minutes_label.get_text());
      smpte.seconds = atoi (seconds_label.get_text());
      smpte.frames = atoi (frames_label.get_text());
      smpte.rate = session->smpte_frames_per_second();
      smpte.drop= session->smpte_drop_frames();

      session->smpte_to_sample( smpte, sample, false /* use_offset */, false /* use_subframes */ );
      

#if 0
#define SMPTE_SAMPLE_TEST_1
#define SMPTE_SAMPLE_TEST_2
#define SMPTE_SAMPLE_TEST_3
#define SMPTE_SAMPLE_TEST_4
#define SMPTE_SAMPLE_TEST_5
#define SMPTE_SAMPLE_TEST_6
#define SMPTE_SAMPLE_TEST_7

      // Testcode for smpte<->sample conversions (P.S.)
      SMPTE::Time smpte1;
      nframes_t sample1;
      nframes_t oldsample = 0;
      SMPTE::Time smpte2;
      nframes_t sample_increment;

      sample_increment = (long)rint(session->frame_rate() / session->smpte_frames_per_second);

#ifdef SMPTE_SAMPLE_TEST_1
      // Test 1: use_offset = false, use_subframes = false
      cout << "use_offset = false, use_subframes = false" << endl;
      for (int i = 0; i < 108003; i++) {
            session->smpte_to_sample( smpte1, sample1, false /* use_offset */, false /* use_subframes */ );
            session->sample_to_smpte( sample1, smpte2, false /* use_offset */, false /* use_subframes */ );

            if ((i > 0) && ( ((sample1 - oldsample) != sample_increment) && ((sample1 - oldsample) != (sample_increment + 1)) && ((sample1 - oldsample) != (sample_increment - 1)))) {
                  cout << "ERROR: sample increment not right: " << (sample1 - oldsample) << " != " << sample_increment << endl;
                  cout << "smpte1: " << smpte1.hours << ":" << smpte1.minutes << ":" << smpte1.seconds << ":" << smpte1.frames << "::" << smpte1.subframes << " -> ";
                  cout << "sample: " << sample1 << endl;
                  cout << "sample: " << sample1 << " -> ";
                  cout << "smpte2: " << smpte2.hours << ":" << smpte2.minutes << ":" << smpte2.seconds << ":" << smpte2.frames << "::" << smpte2.subframes << endl;
                  break;
            }
    
            if (smpte2.hours != smpte1.hours || smpte2.minutes != smpte1.minutes || smpte2.seconds != smpte2.seconds || smpte2.frames != smpte1.frames) {
                  cout << "ERROR: smpte2 not equal smpte1" << endl;
                  cout << "smpte1: " << smpte1.hours << ":" << smpte1.minutes << ":" << smpte1.seconds << ":" << smpte1.frames << "::" << smpte1.subframes << " -> ";
                  cout << "sample: " << sample1 << endl;
                  cout << "sample: " << sample1 << " -> ";
                  cout << "smpte2: " << smpte2.hours << ":" << smpte2.minutes << ":" << smpte2.seconds << ":" << smpte2.frames << "::" << smpte2.subframes << endl;
                  break;
            }
            oldsample = sample1;
            session->smpte_increment( smpte1 );
      }

      cout << "sample_increment: " << sample_increment << endl;
      cout << "sample: " << sample1 << " -> ";
      cout << "smpte: " << smpte2.hours << ":" << smpte2.minutes << ":" << smpte2.seconds << ":" << smpte2.frames << "::" << smpte2.subframes << endl;
#endif

#ifdef SMPTE_SAMPLE_TEST_2
      // Test 2: use_offset = true, use_subframes = false
      cout << "use_offset = true, use_subframes = false" << endl;
  
      smpte1.hours = 0;
      smpte1.minutes = 0;
      smpte1.seconds = 0;
      smpte1.frames = 0;
      smpte1.subframes = 0;
      sample1 = oldsample = 0;

      session->sample_to_smpte( sample1, smpte1, true /* use_offset */, false /* use_subframes */ );
      cout << "Starting at sample: " << sample1 << " -> ";
      cout << "smpte: " << (smpte1.negative ? "-" : "") << smpte1.hours << ":" << smpte1.minutes << ":" << smpte1.seconds << ":" << smpte1.frames << "::" << smpte1.subframes << endl;

      for (int i = 0; i < 108003; i++) {
            session->smpte_to_sample( smpte1, sample1, true /* use_offset */, false /* use_subframes */ );
            session->sample_to_smpte( sample1, smpte2, true /* use_offset */, false /* use_subframes */ );

//     cout << "smpte: " << (smpte1.negative ? "-" : "") << smpte1.hours << ":" << smpte1.minutes << ":" << smpte1.seconds << ":" << smpte1.frames << "::" << smpte1.subframes << " -> ";
//     cout << "sample: " << sample1 << endl;
//     cout << "sample: " << sample1 << " -> ";
//     cout << "smpte: " << (smpte2.negative ? "-" : "") << smpte2.hours << ":" << smpte2.minutes << ":" << smpte2.seconds << ":" << smpte2.frames << "::" << smpte2.subframes << endl;
    
            if ((i > 0) && ( ((sample1 - oldsample) != sample_increment) && ((sample1 - oldsample) != (sample_increment + 1)) && ((sample1 - oldsample) != (sample_increment - 1)))) {
                  cout << "ERROR: sample increment not right: " << (sample1 - oldsample) << " != " << sample_increment << endl;
                  cout << "smpte1: " << (smpte1.negative ? "-" : "") << smpte1.hours << ":" << smpte1.minutes << ":" << smpte1.seconds << ":" << smpte1.frames << "::" << smpte1.subframes << " -> ";
                  cout << "sample: " << sample1 << endl;
                  cout << "sample: " << sample1 << " -> ";
                  cout << "smpte2: " << (smpte2.negative ? "-" : "") << smpte2.hours << ":" << smpte2.minutes << ":" << smpte2.seconds << ":" << smpte2.frames << "::" << smpte2.subframes << endl;
                  break;
            }
    
            if (smpte2.hours != smpte1.hours || smpte2.minutes != smpte1.minutes || smpte2.seconds != smpte2.seconds || smpte2.frames != smpte1.frames) {
                  cout << "ERROR: smpte2 not equal smpte1" << endl;
                  cout << "smpte1: " << (smpte1.negative ? "-" : "") << smpte1.hours << ":" << smpte1.minutes << ":" << smpte1.seconds << ":" << smpte1.frames << "::" << smpte1.subframes << " -> ";
                  cout << "sample: " << sample1 << endl;
                  cout << "sample: " << sample1 << " -> ";
                  cout << "smpte2: " << (smpte2.negative ? "-" : "") << smpte2.hours << ":" << smpte2.minutes << ":" << smpte2.seconds << ":" << smpte2.frames << "::" << smpte2.subframes << endl;
                  break;
            }
            oldsample = sample1;
            session->smpte_increment( smpte1 );
      }

      cout << "sample_increment: " << sample_increment << endl;
      cout << "sample: " << sample1 << " -> ";
      cout << "smpte: " << (smpte2.negative ? "-" : "") << smpte2.hours << ":" << smpte2.minutes << ":" << smpte2.seconds << ":" << smpte2.frames << "::" << smpte2.subframes << endl;
#endif

#ifdef SMPTE_SAMPLE_TEST_3
      // Test 3: use_offset = true, use_subframes = false, decrement
      cout << "use_offset = true, use_subframes = false, decrement" << endl;  

      session->sample_to_smpte( sample1, smpte1, true /* use_offset */, false /* use_subframes */ );
      cout << "Starting at sample: " << sample1 << " -> ";
      cout << "smpte: " << (smpte1.negative ? "-" : "") << smpte1.hours << ":" << smpte1.minutes << ":" << smpte1.seconds << ":" << smpte1.frames << "::" << smpte1.subframes << endl;

      for (int i = 0; i < 108003; i++) {
            session->smpte_to_sample( smpte1, sample1, true /* use_offset */, false /* use_subframes */ );
            session->sample_to_smpte( sample1, smpte2, true /* use_offset */, false /* use_subframes */ );

//     cout << "smpte: " << (smpte1.negative ? "-" : "") << smpte1.hours << ":" << smpte1.minutes << ":" << smpte1.seconds << ":" << smpte1.frames << "::" << smpte1.subframes << " -> ";
//     cout << "sample: " << sample1 << endl;
//     cout << "sample: " << sample1 << " -> ";
//     cout << "smpte: " << (smpte2.negative ? "-" : "") << smpte2.hours << ":" << smpte2.minutes << ":" << smpte2.seconds << ":" << smpte2.frames << "::" << smpte2.subframes << endl;
    
            if ((i > 0) && ( ((oldsample - sample1) != sample_increment) && ((oldsample - sample1) != (sample_increment + 1)) && ((oldsample - sample1) != (sample_increment - 1)))) {
                  cout << "ERROR: sample increment not right: " << (oldsample - sample1) << " != " << sample_increment << endl;
                  cout << "smpte1: " << (smpte1.negative ? "-" : "") << smpte1.hours << ":" << smpte1.minutes << ":" << smpte1.seconds << ":" << smpte1.frames << "::" << smpte1.subframes << " -> ";
                  cout << "sample: " << sample1 << endl;
                  cout << "sample: " << sample1 << " -> ";
                  cout << "smpte2: " << (smpte2.negative ? "-" : "") << smpte2.hours << ":" << smpte2.minutes << ":" << smpte2.seconds << ":" << smpte2.frames << "::" << smpte2.subframes << endl;
                  break;
            }
    
            if (smpte2.hours != smpte1.hours || smpte2.minutes != smpte1.minutes || smpte2.seconds != smpte2.seconds || smpte2.frames != smpte1.frames) {
                  cout << "ERROR: smpte2 not equal smpte1" << endl;
                  cout << "smpte1: " << (smpte1.negative ? "-" : "") << smpte1.hours << ":" << smpte1.minutes << ":" << smpte1.seconds << ":" << smpte1.frames << "::" << smpte1.subframes << " -> ";
                  cout << "sample: " << sample1 << endl;
                  cout << "sample: " << sample1 << " -> ";
                  cout << "smpte2: " << (smpte2.negative ? "-" : "") << smpte2.hours << ":" << smpte2.minutes << ":" << smpte2.seconds << ":" << smpte2.frames << "::" << smpte2.subframes << endl;
                  break;
            }
            oldsample = sample1;
            session->smpte_decrement( smpte1 );
      }

      cout << "sample_decrement: " << sample_increment << endl;
      cout << "sample: " << sample1 << " -> ";
      cout << "smpte: " << (smpte2.negative ? "-" : "") << smpte2.hours << ":" << smpte2.minutes << ":" << smpte2.seconds << ":" << smpte2.frames << "::" << smpte2.subframes << endl;
#endif


#ifdef SMPTE_SAMPLE_TEST_4
      // Test 4: use_offset = true, use_subframes = true
      cout << "use_offset = true, use_subframes = true" << endl;
  
      for (long sub = 5; sub < 80; sub += 5) {
            smpte1.hours = 0;
            smpte1.minutes = 0;
            smpte1.seconds = 0;
            smpte1.frames = 0;
            smpte1.subframes = 0;
            sample1 = oldsample = (sample_increment * sub) / 80;
    
            session->sample_to_smpte( sample1, smpte1, true /* use_offset */, true /* use_subframes */ );
    
            cout << "starting at sample: " << sample1 << " -> ";
            cout << "smpte: " << (smpte1.negative ? "-" : "") << smpte1.hours << ":" << smpte1.minutes << ":" << smpte1.seconds << ":" << smpte1.frames << "::" << smpte1.subframes << endl;
    
            for (int i = 0; i < 108003; i++) {
                  session->smpte_to_sample( smpte1, sample1, true /* use_offset */, true /* use_subframes */ );
                  session->sample_to_smpte( sample1, smpte2, true /* use_offset */, true /* use_subframes */ );
      
                  if ((i > 0) && ( ((sample1 - oldsample) != sample_increment) && ((sample1 - oldsample) != (sample_increment + 1)) && ((sample1 - oldsample) != (sample_increment - 1)))) {
                        cout << "ERROR: sample increment not right: " << (sample1 - oldsample) << " != " << sample_increment << endl;
                        cout << "smpte1: " << (smpte1.negative ? "-" : "") << smpte1.hours << ":" << smpte1.minutes << ":" << smpte1.seconds << ":" << smpte1.frames << "::" << smpte1.subframes << " -> ";
                        cout << "sample: " << sample1 << endl;
                        cout << "sample: " << sample1 << " -> ";
                        cout << "smpte2: " << (smpte2.negative ? "-" : "") << smpte2.hours << ":" << smpte2.minutes << ":" << smpte2.seconds << ":" << smpte2.frames << "::" << smpte2.subframes << endl;
                        //break;
                  }
      
                  if (smpte2.hours != smpte1.hours || smpte2.minutes != smpte1.minutes || smpte2.seconds != smpte2.seconds || smpte2.frames != smpte1.frames || smpte2.subframes != smpte1.subframes) {
                        cout << "ERROR: smpte2 not equal smpte1" << endl;
                        cout << "smpte1: " << (smpte1.negative ? "-" : "") << smpte1.hours << ":" << smpte1.minutes << ":" << smpte1.seconds << ":" << smpte1.frames << "::" << smpte1.subframes << " -> ";
                        cout << "sample: " << sample1 << endl;
                        cout << "sample: " << sample1 << " -> ";
                        cout << "smpte2: " << (smpte2.negative ? "-" : "") << smpte2.hours << ":" << smpte2.minutes << ":" << smpte2.seconds << ":" << smpte2.frames << "::" << smpte2.subframes << endl;
                        break;
                  }
                  oldsample = sample1;
                  session->smpte_increment( smpte1 );
            }
    
            cout << "sample_increment: " << sample_increment << endl;
            cout << "sample: " << sample1 << " -> ";
            cout << "smpte: " << (smpte2.negative ? "-" : "") << smpte2.hours << ":" << smpte2.minutes << ":" << smpte2.seconds << ":" << smpte2.frames << "::" << smpte2.subframes << endl;

            for (int i = 0; i < 108003; i++) {
                  session->smpte_to_sample( smpte1, sample1, true /* use_offset */, true /* use_subframes */ );
                  session->sample_to_smpte( sample1, smpte2, true /* use_offset */, true /* use_subframes */ );
      
                  if ((i > 0) && ( ((oldsample - sample1) != sample_increment) && ((oldsample - sample1) != (sample_increment + 1)) && ((oldsample - sample1) != (sample_increment - 1)))) {
                        cout << "ERROR: sample increment not right: " << (oldsample - sample1) << " != " << sample_increment << endl;
                        cout << "smpte1: " << (smpte1.negative ? "-" : "") << smpte1.hours << ":" << smpte1.minutes << ":" << smpte1.seconds << ":" << smpte1.frames << "::" << smpte1.subframes << " -> ";
                        cout << "sample: " << sample1 << endl;
                        cout << "sample: " << sample1 << " -> ";
                        cout << "smpte2: " << (smpte2.negative ? "-" : "") << smpte2.hours << ":" << smpte2.minutes << ":" << smpte2.seconds << ":" << smpte2.frames << "::" << smpte2.subframes << endl;
                        //break;
                  }
      
                  if (smpte2.hours != smpte1.hours || smpte2.minutes != smpte1.minutes || smpte2.seconds != smpte2.seconds || smpte2.frames != smpte1.frames || smpte2.subframes != smpte1.subframes) {
                        cout << "ERROR: smpte2 not equal smpte1" << endl;
                        cout << "smpte1: " << (smpte1.negative ? "-" : "") << smpte1.hours << ":" << smpte1.minutes << ":" << smpte1.seconds << ":" << smpte1.frames << "::" << smpte1.subframes << " -> ";
                        cout << "sample: " << sample1 << endl;
                        cout << "sample: " << sample1 << " -> ";
                        cout << "smpte2: " << (smpte2.negative ? "-" : "") << smpte2.hours << ":" << smpte2.minutes << ":" << smpte2.seconds << ":" << smpte2.frames << "::" << smpte2.subframes << endl;
                        break;
                  }
                  oldsample = sample1;
                  session->smpte_decrement( smpte1 );
            }
    
            cout << "sample_decrement: " << sample_increment << endl;
            cout << "sample: " << sample1 << " -> ";
            cout << "smpte: " << (smpte2.negative ? "-" : "") << smpte2.hours << ":" << smpte2.minutes << ":" << smpte2.seconds << ":" << smpte2.frames << "::" << smpte2.subframes << endl;
      }
#endif


#ifdef SMPTE_SAMPLE_TEST_5
      // Test 5: use_offset = true, use_subframes = false, increment seconds
      cout << "use_offset = true, use_subframes = false, increment seconds" << endl;
  
      smpte1.hours = 0;
      smpte1.minutes = 0;
      smpte1.seconds = 0;
      smpte1.frames = 0;
      smpte1.subframes = 0;
      sample1 = oldsample = 0;
      sample_increment = session->frame_rate();

      session->sample_to_smpte( sample1, smpte1, true /* use_offset */, false /* use_subframes */ );
      cout << "Starting at sample: " << sample1 << " -> ";
      cout << "smpte: " << (smpte1.negative ? "-" : "") << smpte1.hours << ":" << smpte1.minutes << ":" << smpte1.seconds << ":" << smpte1.frames << "::" << smpte1.subframes << endl;

      for (int i = 0; i < 3600; i++) {
            session->smpte_to_sample( smpte1, sample1, true /* use_offset */, false /* use_subframes */ );
            session->sample_to_smpte( sample1, smpte2, true /* use_offset */, false /* use_subframes */ );

//     cout << "smpte: " << (smpte1.negative ? "-" : "") << smpte1.hours << ":" << smpte1.minutes << ":" << smpte1.seconds << ":" << smpte1.frames << "::" << smpte1.subframes << " -> ";
//     cout << "sample: " << sample1 << endl;
//     cout << "sample: " << sample1 << " -> ";
//     cout << "smpte: " << (smpte2.negative ? "-" : "") << smpte2.hours << ":" << smpte2.minutes << ":" << smpte2.seconds << ":" << smpte2.frames << "::" << smpte2.subframes << endl;
    
//     if ((i > 0) && ( ((sample1 - oldsample) != sample_increment) && ((sample1 - oldsample) != (sample_increment + 1)) && ((sample1 - oldsample) != (sample_increment - 1))))
//     {
//       cout << "ERROR: sample increment not right: " << (sample1 - oldsample) << " != " << sample_increment << endl;
//       break;
//     }
    
            if (smpte2.hours != smpte1.hours || smpte2.minutes != smpte1.minutes || smpte2.seconds != smpte2.seconds || smpte2.frames != smpte1.frames) {
                  cout << "ERROR: smpte2 not equal smpte1" << endl;
                  cout << "smpte: " << (smpte1.negative ? "-" : "") << smpte1.hours << ":" << smpte1.minutes << ":" << smpte1.seconds << ":" << smpte1.frames << "::" << smpte1.subframes << " -> ";
                  cout << "sample: " << sample1 << endl;
                  cout << "sample: " << sample1 << " -> ";
                  cout << "smpte: " << (smpte2.negative ? "-" : "") << smpte2.hours << ":" << smpte2.minutes << ":" << smpte2.seconds << ":" << smpte2.frames << "::" << smpte2.subframes << endl;
                  break;
            }
            oldsample = sample1;
            session->smpte_increment_seconds( smpte1 );
      }

      cout << "sample_increment: " << sample_increment << endl;
      cout << "sample: " << sample1 << " -> ";
      cout << "smpte: " << (smpte2.negative ? "-" : "") << smpte2.hours << ":" << smpte2.minutes << ":" << smpte2.seconds << ":" << smpte2.frames << "::" << smpte2.subframes << endl;
#endif


#ifdef SMPTE_SAMPLE_TEST_6
      // Test 6: use_offset = true, use_subframes = false, increment minutes
      cout << "use_offset = true, use_subframes = false, increment minutes" << endl;
  
      smpte1.hours = 0;
      smpte1.minutes = 0;
      smpte1.seconds = 0;
      smpte1.frames = 0;
      smpte1.subframes = 0;
      sample1 = oldsample = 0;
      sample_increment = session->frame_rate() * 60;

      session->sample_to_smpte( sample1, smpte1, true /* use_offset */, false /* use_subframes */ );
      cout << "Starting at sample: " << sample1 << " -> ";
      cout << "smpte: " << (smpte1.negative ? "-" : "") << smpte1.hours << ":" << smpte1.minutes << ":" << smpte1.seconds << ":" << smpte1.frames << "::" << smpte1.subframes << endl;

      for (int i = 0; i < 60; i++) {
            session->smpte_to_sample( smpte1, sample1, true /* use_offset */, false /* use_subframes */ );
            session->sample_to_smpte( sample1, smpte2, true /* use_offset */, false /* use_subframes */ );

//     cout << "smpte: " << (smpte1.negative ? "-" : "") << smpte1.hours << ":" << smpte1.minutes << ":" << smpte1.seconds << ":" << smpte1.frames << "::" << smpte1.subframes << " -> ";
//     cout << "sample: " << sample1 << endl;
//     cout << "sample: " << sample1 << " -> ";
//     cout << "smpte: " << (smpte2.negative ? "-" : "") << smpte2.hours << ":" << smpte2.minutes << ":" << smpte2.seconds << ":" << smpte2.frames << "::" << smpte2.subframes << endl;
    
//     if ((i > 0) && ( ((sample1 - oldsample) != sample_increment) && ((sample1 - oldsample) != (sample_increment + 1)) && ((sample1 - oldsample) != (sample_increment - 1))))
//     {
//       cout << "ERROR: sample increment not right: " << (sample1 - oldsample) << " != " << sample_increment << endl;
//       break;
//     }
    
            if (smpte2.hours != smpte1.hours || smpte2.minutes != smpte1.minutes || smpte2.seconds != smpte2.seconds || smpte2.frames != smpte1.frames) {
                  cout << "ERROR: smpte2 not equal smpte1" << endl;
                  cout << "smpte: " << (smpte1.negative ? "-" : "") << smpte1.hours << ":" << smpte1.minutes << ":" << smpte1.seconds << ":" << smpte1.frames << "::" << smpte1.subframes << " -> ";
                  cout << "sample: " << sample1 << endl;
                  cout << "sample: " << sample1 << " -> ";
                  cout << "smpte: " << (smpte2.negative ? "-" : "") << smpte2.hours << ":" << smpte2.minutes << ":" << smpte2.seconds << ":" << smpte2.frames << "::" << smpte2.subframes << endl;
                  break;
            }
            oldsample = sample1;
            session->smpte_increment_minutes( smpte1 );
      }

      cout << "sample_increment: " << sample_increment << endl;
      cout << "sample: " << sample1 << " -> ";
      cout << "smpte: " << (smpte2.negative ? "-" : "") << smpte2.hours << ":" << smpte2.minutes << ":" << smpte2.seconds << ":" << smpte2.frames << "::" << smpte2.subframes << endl;
#endif

#ifdef SMPTE_SAMPLE_TEST_7
      // Test 7: use_offset = true, use_subframes = false, increment hours
      cout << "use_offset = true, use_subframes = false, increment hours" << endl;
  
      smpte1.hours = 0;
      smpte1.minutes = 0;
      smpte1.seconds = 0;
      smpte1.frames = 0;
      smpte1.subframes = 0;
      sample1 = oldsample = 0;
      sample_increment = session->frame_rate() * 60 * 60;

      session->sample_to_smpte( sample1, smpte1, true /* use_offset */, false /* use_subframes */ );
      cout << "Starting at sample: " << sample1 << " -> ";
      cout << "smpte: " << (smpte1.negative ? "-" : "") << smpte1.hours << ":" << smpte1.minutes << ":" << smpte1.seconds << ":" << smpte1.frames << "::" << smpte1.subframes << endl;

      for (int i = 0; i < 10; i++) {
            session->smpte_to_sample( smpte1, sample1, true /* use_offset */, false /* use_subframes */ );
            session->sample_to_smpte( sample1, smpte2, true /* use_offset */, false /* use_subframes */ );

//     cout << "smpte: " << (smpte1.negative ? "-" : "") << smpte1.hours << ":" << smpte1.minutes << ":" << smpte1.seconds << ":" << smpte1.frames << "::" << smpte1.subframes << " -> ";
//     cout << "sample: " << sample1 << endl;
//     cout << "sample: " << sample1 << " -> ";
//     cout << "smpte: " << (smpte2.negative ? "-" : "") << smpte2.hours << ":" << smpte2.minutes << ":" << smpte2.seconds << ":" << smpte2.frames << "::" << smpte2.subframes << endl;
    
//     if ((i > 0) && ( ((sample1 - oldsample) != sample_increment) && ((sample1 - oldsample) != (sample_increment + 1)) && ((sample1 - oldsample) != (sample_increment - 1))))
//     {
//       cout << "ERROR: sample increment not right: " << (sample1 - oldsample) << " != " << sample_increment << endl;
//       break;
//     }
    
            if (smpte2.hours != smpte1.hours || smpte2.minutes != smpte1.minutes || smpte2.seconds != smpte2.seconds || smpte2.frames != smpte1.frames) {
                  cout << "ERROR: smpte2 not equal smpte1" << endl;
                  cout << "smpte: " << (smpte1.negative ? "-" : "") << smpte1.hours << ":" << smpte1.minutes << ":" << smpte1.seconds << ":" << smpte1.frames << "::" << smpte1.subframes << " -> ";
                  cout << "sample: " << sample1 << endl;
                  cout << "sample: " << sample1 << " -> ";
                  cout << "smpte: " << (smpte2.negative ? "-" : "") << smpte2.hours << ":" << smpte2.minutes << ":" << smpte2.seconds << ":" << smpte2.frames << "::" << smpte2.subframes << endl;
                  break;
            }
            oldsample = sample1;
            session->smpte_increment_hours( smpte1 );
      }

      cout << "sample_increment: " << sample_increment << endl;
      cout << "sample: " << sample1 << " -> ";
      cout << "smpte: " << (smpte2.negative ? "-" : "") << smpte2.hours << ":" << smpte2.minutes << ":" << smpte2.seconds << ":" << smpte2.frames << "::" << smpte2.subframes << endl;
#endif

#endif  

      return sample;
}

nframes_t
AudioClock::minsec_frame_from_display () const
{
      if (session == 0) {
            return 0;
      }

      int hrs = atoi (ms_hours_label.get_text());
      int mins = atoi (ms_minutes_label.get_text());
      float secs = atof (ms_seconds_label.get_text());

      nframes_t sr = session->frame_rate();

      return (nframes_t) floor ((hrs * 60.0f * 60.0f * sr) + (mins * 60.0f * sr) + (secs * sr));
}

nframes_t
AudioClock::bbt_frame_from_display (nframes_t pos) const
{
      if (session == 0) {
            error << "AudioClock::current_time() called with BBT mode but without session!" << endmsg;
            return 0;
      }

      AnyTime any;
      any.type = AnyTime::BBT;

      any.bbt.bars = atoi (bars_label.get_text());
      any.bbt.beats = atoi (beats_label.get_text());
      any.bbt.ticks = atoi (ticks_label.get_text());

       if (is_duration) {
               any.bbt.bars++;
               any.bbt.beats++;
       }

      nframes_t ret = session->convert_to_frames_at (pos, any);

      return ret;
}


nframes_t
AudioClock::bbt_frame_duration_from_display (nframes_t pos) const
{
      if (session == 0) {
            error << "AudioClock::current_time() called with BBT mode but without session!" << endmsg;
            return 0;
      }

      BBT_Time bbt;


      bbt.bars = atoi (bars_label.get_text());
      bbt.beats = atoi (beats_label.get_text());
      bbt.ticks = atoi (ticks_label.get_text());
      
      return session->tempo_map().bbt_duration_at(pos,bbt,1);
}

nframes_t
AudioClock::audio_frame_from_display () const
{
      return (nframes_t) atoi (audio_frames_label.get_text());
}

void
AudioClock::build_ops_menu ()
{
      using namespace Menu_Helpers;
      ops_menu = new Menu;
      MenuList& ops_items = ops_menu->items();
      ops_menu->set_name ("ArdourContextMenu");
      
      if (!Profile->get_sae()) {
            ops_items.push_back (MenuElem (_("Timecode"), bind (mem_fun(*this, &AudioClock::set_mode), SMPTE)));
      }
      ops_items.push_back (MenuElem (_("Bars:Beats"), bind (mem_fun(*this, &AudioClock::set_mode), BBT)));
      ops_items.push_back (MenuElem (_("Minutes:Seconds"), bind (mem_fun(*this, &AudioClock::set_mode), MinSec)));
      ops_items.push_back (MenuElem (_("Samples"), bind (mem_fun(*this, &AudioClock::set_mode), Frames)));
      ops_items.push_back (MenuElem (_("Off"), bind (mem_fun(*this, &AudioClock::set_mode), Off)));
}

void
AudioClock::set_mode (Mode m)
{
      /* slightly tricky: this is called from within the ARDOUR_UI
         constructor by some of its clock members. at that time
         the instance pointer is unset, so we have to be careful.
         the main idea is to drop keyboard focus in case we had
         started editing the clock and then we switch clock mode.
      */

      clock_base.grab_focus ();
            
      if (_mode == m) {
            return;
      }
      
      clock_base.remove ();
      
      _mode = m;

      switch (_mode) {
      case SMPTE:
            clock_base.add (smpte_packer_hbox);
            break;

      case BBT:
            clock_base.add (bbt_packer_hbox);
            break;

      case MinSec:
            clock_base.add (minsec_packer_hbox);
            break;

      case Frames:
            clock_base.add (frames_packer_hbox);
            break;

      case Off:
            clock_base.add (off_hbox);
            break;
      }

      set_size_requests ();
      
      set (last_when, true);
      clock_base.show_all ();
      key_entry_state = 0;

      if (!is_transient) {
            ModeChanged (); /* EMIT SIGNAL */
      }
}

void
AudioClock::set_size_requests ()
{
      /* note that in some fonts, "88" is narrower than "00", hence the 2 pixel padding */

      switch (_mode) {
      case SMPTE:
            Gtkmm2ext::set_size_request_to_display_given_text (hours_label, "-00", 5, 5);
            Gtkmm2ext::set_size_request_to_display_given_text (minutes_label, "00", 5, 5);
            Gtkmm2ext::set_size_request_to_display_given_text (seconds_label, "00", 5, 5);
            Gtkmm2ext::set_size_request_to_display_given_text (frames_label, "00", 5, 5);
            break;

      case BBT:
            Gtkmm2ext::set_size_request_to_display_given_text (bars_label, "-000", 5, 5);
            Gtkmm2ext::set_size_request_to_display_given_text (beats_label, "00", 5, 5);
            Gtkmm2ext::set_size_request_to_display_given_text (ticks_label, "0000", 5, 5);
            break;

      case MinSec:
            Gtkmm2ext::set_size_request_to_display_given_text (ms_hours_label, "00", 5, 5);
            Gtkmm2ext::set_size_request_to_display_given_text (ms_minutes_label, "00", 5, 5);
            Gtkmm2ext::set_size_request_to_display_given_text (ms_seconds_label, "00.000", 5, 5);
            break;

      case Frames:
            Gtkmm2ext::set_size_request_to_display_given_text (audio_frames_label, "0000000000", 5, 5);
            break;

      case Off:
            Gtkmm2ext::set_size_request_to_display_given_text (off_hbox, "00000", 5, 5);
            break;
            
      }
}

void
AudioClock::set_bbt_reference (nframes64_t pos)
{
      bbt_reference_time = pos;
}

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