/*
    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 <gtkmm/style.h>

#include "gtkmm2ext/cairocell.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 "gui_thread.h"
#include "i18n.h"

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

using Gtkmm2ext::Keyboard;

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

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

uint32_t AudioClock::field_length[] = {
	1, /* Timecode_Sign */
	2, /* Timecode_Hours */
	2, /* Timecode_Minutes */
	2, /* Timecode_Seconds */
	2, /* Timecode_Frames */
	2, /* MS_Hours */
	2, /* MS_Minutes */
	2, /* MS_Seconds */
	3, /* MS_Milliseconds */
	4, /* Bars */
	2, /* Beats */
	4, /* Ticks */
	10, /* AudioFrames */
};

AudioClock::AudioClock (const string& clock_name, bool transient, const string& widget_name,
			bool allow_edit, bool follows_playhead, bool duration, bool with_info)
	: _name (clock_name)
	, is_transient (transient)
	, is_duration (duration)
	, editable (allow_edit)
	, _follows_playhead (follows_playhead)
	, _off (false)
	, supplemental_left (0)
	, supplemental_right (0)
	, last_when(0)
	, _canonical_time_is_displayed (true)
	, _canonical_time (0)
{
	last_when = 0;
	
	last_hrs = 9999;
	last_mins = 9999;
	last_secs = 9999;
	last_frames = 99999;

	ms_last_hrs = 9999;
	ms_last_mins = 9999;
	ms_last_secs = 9999;
	ms_last_millisecs = 99999;

	last_negative = false;
	
	last_pdelta = 0;
	last_sdelta = 0;
	key_entry_state = 0;
	ops_menu = 0;
	dragging = false;
	bbt_reference_time = -1;
	editing_field = (Field) 0;

	/* basic per-mode editable text "arrays" */

	display = new CairoEditableText ();
	display->set_corner_radius (0);

	_fixed_cells[Colon1] = new CairoCharCell (Colon1, ':');
	_fixed_cells[Colon2] = new CairoCharCell (Colon2, ':');
	_fixed_cells[Colon3] = new CairoCharCell (Colon3, ':');
	_fixed_cells[Bar1] = new CairoCharCell (Bar1, '|');
	_fixed_cells[Bar2] = new CairoCharCell (Bar2, '|');
	
	_text_cells[Timecode_Sign] = new CairoTextCell (Timecode_Sign, field_length[Timecode_Sign]);
	_text_cells[Timecode_Hours] = new CairoTextCell (Timecode_Hours, field_length[Timecode_Hours]);
	_text_cells[Timecode_Minutes] = new CairoTextCell (Timecode_Minutes, field_length[Timecode_Minutes]);
	_text_cells[Timecode_Seconds] = new CairoTextCell (Timecode_Seconds, field_length[Timecode_Seconds]);
	_text_cells[Timecode_Frames] = new CairoTextCell (Timecode_Frames, field_length[Timecode_Frames]);

	/* Minutes/Seconds */
	
	_text_cells[MS_Hours] = new CairoTextCell (MS_Hours, field_length[MS_Hours]);
	_text_cells[MS_Minutes] = new CairoTextCell (MS_Minutes, field_length[MS_Minutes]);
	_text_cells[MS_Seconds] = new CairoTextCell (MS_Seconds, field_length[MS_Seconds]);
	_text_cells[MS_Milliseconds] = new CairoTextCell (MS_Milliseconds, field_length[MS_Milliseconds]);

	/* Beats/Bars/Ticks */
	
	_text_cells[Bars] = new CairoTextCell (Bars, field_length[Bars]);
	_text_cells[Beats] = new CairoTextCell (Beats, field_length[Beats]);
	_text_cells[Ticks] = new CairoTextCell (Ticks, field_length[Ticks]);

	/* Audio Frames */
	
	_text_cells[AudioFrames] = new CairoTextCell (AudioFrames, field_length[AudioFrames]);

	set_homogeneous (false);

	if (with_info) {

		supplemental_left = new CairoEditableText ();
		supplemental_right = new CairoEditableText ();

		supplemental_left->set_corner_radius (0);
		supplemental_right->set_corner_radius (0);

		/* field lengths of these cells will be set dynamically by ::set_mode()
		 */

		_text_cells[LowerLeft1] = new CairoTextCell (LowerLeft1, 0);
		_text_cells[LowerLeft2] = new CairoTextCell (LowerLeft2, 0);
		_text_cells[LowerRight1] = new CairoTextCell (LowerRight1, 0);
		_text_cells[LowerRight2] = new CairoTextCell (LowerRight2, 0);
		
		bottom.set_spacing (1);
		bottom.set_homogeneous (false);
		bottom.pack_start (*supplemental_left, true, true);
		bottom.pack_start (*supplemental_right, true, true);

		top.pack_start (*display, true, true);
		
		set_spacing (1);
		
		pack_start (top, true, true);
		pack_start (bottom, true, true);
	} else {
		pack_start (*display, true, true);
	}

	show_all ();

	set_widget_name (widget_name);

	_mode = BBT; /* lie to force mode switch */
	set_mode (Timecode);
	set (last_when, true);

	connect_signals ();

	if (!is_transient) {
		clocks.push_back (this);
	}
}
	
AudioClock::~AudioClock ()
{
	/* these are not manage()'d, so that we can add/remove
	   them from containers as necessary.
	*/

	delete display;
	delete supplemental_left;
	delete supplemental_right;

	for (std::map<Field,CairoCell*>::iterator i = _fixed_cells.begin(); i != _fixed_cells.end(); ++i) {
		delete i->second;
	}

	for (std::map<Field,CairoTextCell*>::iterator i = _text_cells.begin(); i != _text_cells.end(); ++i) {
		delete i->second;
	}
}

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

	set_theme ();
}

void
AudioClock::set_theme ()
{
	Glib::RefPtr<Gtk::Style> style = get_style ();
	double r, g, b, a;

	if (!style) {
		return;
	}

	Pango::FontDescription font; 

	if (!is_realized()) {
		font = get_font_for_style (get_name());
	} else {
		font = style->get_font();
	}

	display->set_font (font);


	if (supplemental_left) {
		/* propagate font style, sort of, into supplemental text */
		boost::shared_ptr<CairoFontDescription> smaller_font (new CairoFontDescription (*display->font().get()));
		smaller_font->set_size (12);
		smaller_font->set_weight (Cairo::FONT_WEIGHT_NORMAL);
		supplemental_right->set_font (smaller_font);
		supplemental_left->set_font (smaller_font);
	}

	Gdk::Color bg = style->get_base (Gtk::STATE_NORMAL);
	Gdk::Color fg = style->get_text (Gtk::STATE_NORMAL);
	Gdk::Color eg = style->get_text (Gtk::STATE_ACTIVE);

	r = bg.get_red_p ();
	g = bg.get_green_p ();
	b = bg.get_blue_p ();
	a = 1.0;

	display->set_bg (r, g, b, a);

	if (supplemental_right) {
		supplemental_right->set_bg (r,g,b,a);
		supplemental_left->set_bg (r,g,b,a);
	}

	r = fg.get_red_p ();
	g = fg.get_green_p ();
	b = fg.get_blue_p ();
	a = 1.0;

	display->set_colors (r, g, b, a);

	if (supplemental_right) {
		supplemental_right->set_colors (r,g,b,a);
		supplemental_left->set_colors (r,g,b,a);
	}

	r = eg.get_red_p ();
	g = eg.get_green_p ();
	b = eg.get_blue_p ();
	a = 1.0;

	display->set_edit_colors (r, g, b, a);

	if (supplemental_right) {
		supplemental_right->set_edit_colors (r,g,b,a);
		supplemental_left->set_edit_colors (r,g,b,a);
	}

	queue_draw ();
}

void
AudioClock::focus ()
{
}

void
AudioClock::end_edit ()
{
	display->stop_editing ();
	editing_field = (Field) 0;
	key_entry_state = 0;

	/* move focus back to the default widget in the top level window */

	Keyboard::magic_widget_drop_focus ();

	Widget* top = get_toplevel();

	if (top->is_toplevel ()) {
		Window* win = dynamic_cast<Window*> (top);
		win->grab_focus ();
	}
}

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

	/* styles are not available until the widgets are bound to a window */
	
	set_theme ();
}

void
AudioClock::set (framepos_t when, bool force, framecnt_t offset, char which)
{
 	if ((!force && !is_visible()) || _session == 0) {
		return;
	}

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

	if (offset && which == 'p' && pdelta) {
		when = (when > offset) ? when - offset : offset - when;
	} else if (offset && which == 's' && sdelta) {
		when = (when > offset) ? when - offset : offset - when;
	}

	if (when == last_when && !force) {
		return;
	}

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

	switch (_mode) {
	case Timecode:
		set_timecode (when, force);
		break;

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

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

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

	last_when = when;

	/* we're setting the time from a frames value, so keep it as the canonical value */
	_canonical_time = when;
	_canonical_time_is_displayed = false;
}

void
AudioClock::session_configuration_changed (std::string p)
{
	if (p != "timecode-offset" && p != "timecode-offset-negative") {
		return;
	}

	framecnt_t current;

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

void
AudioClock::set_frames (framepos_t when, bool /*force*/)
{
	char buf[32];
	snprintf (buf, sizeof (buf), "%" PRId64, when);

	if (_off) {
		display->set_text (_text_cells[AudioFrames], "-----------");

		if (supplemental_left) {
			supplemental_left->set_text (_text_cells[LowerLeft2], "");
			supplemental_right->set_text (_text_cells[LowerRight2], "");
		}
		
		return;
	}

	
	display->set_text (_text_cells[AudioFrames], buf);

	if (supplemental_left) {
		framecnt_t rate = _session->frame_rate();

		if (fmod (rate, 1000.0) == 0.000) {
			sprintf (buf, "%" PRId64 "K", rate/1000);
		} else {
			sprintf (buf, "%" PRId64, rate);
		}

		supplemental_left->set_text (_text_cells[LowerLeft2], buf);

		float vid_pullup = _session->config.get_video_pullup();

		if (vid_pullup == 0.0) {
			supplemental_right->set_text (_text_cells[LowerRight2], _("none"));
		} else {
			sprintf (buf, "%-6.4f", vid_pullup);
			supplemental_right->set_text (_text_cells[LowerRight2], buf);
		}
	}
}

void
AudioClock::set_minsec (framepos_t when, bool force)
{
	char buf[32];
	framecnt_t left;
	int hrs;
	int mins;
	int secs;
	int millisecs;

	if (_off) {
		display->set_text (_text_cells[MS_Hours], "--");
		display->set_text (_text_cells[MS_Minutes], "--");
		display->set_text (_text_cells[MS_Seconds], "--");
		display->set_text (_text_cells[MS_Milliseconds], "--");

		if (supplemental_left) {
			supplemental_left->set_text (_text_cells[LowerLeft2], "");
			supplemental_right->set_text (_text_cells[LowerRight2], "");
		}
		
		return;
	}	

	left = when;
	hrs = (int) floor (left / (_session->frame_rate() * 60.0f * 60.0f));
	left -= (framecnt_t) floor (hrs * _session->frame_rate() * 60.0f * 60.0f);
	mins = (int) floor (left / (_session->frame_rate() * 60.0f));
	left -= (framecnt_t) floor (mins * _session->frame_rate() * 60.0f);
	secs = (int) floor (left / (float) _session->frame_rate());
	left -= (framecnt_t) floor (secs * _session->frame_rate());
	millisecs = floor (left * 1000.0 / (float) _session->frame_rate());

	if (force || hrs != ms_last_hrs) {
		sprintf (buf, "%02d", hrs);
		display->set_text (_text_cells[MS_Hours], buf);
		ms_last_hrs = hrs;
	}

	if (force || mins != ms_last_mins) {
		sprintf (buf, "%02d", mins);
		display->set_text (_text_cells[MS_Minutes], buf);
		ms_last_mins = mins;
	}

	if (force || secs != ms_last_secs) {
		sprintf (buf, "%02d", secs);
		display->set_text (_text_cells[MS_Seconds], buf);
		ms_last_secs = secs;
	}

	if (force || millisecs != ms_last_millisecs) {
		sprintf (buf, "%03d", millisecs);
		display->set_text (_text_cells[MS_Milliseconds], buf);
		ms_last_millisecs = millisecs;
	}
}

void
AudioClock::set_timecode (framepos_t when, bool force)
{
	char buf[32];
	Timecode::Time TC;

	if (_off) {
		display->set_text (_text_cells[Timecode_Sign], "");
		display->set_text (_text_cells[Timecode_Hours], "--");
		display->set_text (_text_cells[Timecode_Minutes], "--");
		display->set_text (_text_cells[Timecode_Seconds], "--");
		display->set_text (_text_cells[Timecode_Frames], "--");

		if (supplemental_left) {
			supplemental_left->set_text (_text_cells[LowerLeft2], "");
			supplemental_right->set_text (_text_cells[LowerRight2], "");
		}
		
		return;
	}

	if (is_duration) {
		_session->timecode_duration (when, TC);
	} else {
		_session->timecode_time (when, TC);
	}

	if (force || TC.hours != last_hrs || TC.negative != last_negative) {
		if (TC.negative) {
			display->set_text (_text_cells[Timecode_Sign], "-");
			sprintf (buf, "%0*" PRIu32, field_length[Timecode_Hours], TC.hours);
		} else {
			display->set_text (_text_cells[Timecode_Sign], " ");
			sprintf (buf, "%0*" PRIu32, field_length[Timecode_Hours], TC.hours);
		}
		display->set_text (_text_cells[Timecode_Hours], buf);
		last_hrs = TC.hours;
		last_negative = TC.negative;
	}

	if (force || TC.minutes != last_mins) {
		sprintf (buf, "%0*" PRIu32, field_length[Timecode_Minutes], TC.minutes);
		display->set_text (_text_cells[Timecode_Minutes], buf);
		last_mins = TC.minutes;
	}

	if (force || TC.seconds != last_secs) {
		sprintf (buf, "%0*" PRIu32, field_length[Timecode_Seconds], TC.seconds);
		display->set_text (_text_cells[Timecode_Seconds], buf);
		last_secs = TC.seconds;
	}

	if (force || TC.frames != last_frames) {
		sprintf (buf, "%0*" PRIu32, field_length[Timecode_Frames], TC.frames);
		display->set_text (_text_cells[Timecode_Frames], buf);
		last_frames = TC.frames;
	}

	if (supplemental_right) {
		double timecode_frames = _session->timecode_frames_per_second();
	
		if (fmod(timecode_frames, 1.0) == 0.0) {
			sprintf (buf, "%u %s", int (timecode_frames), (_session->timecode_drop_frames() ? "D" : ""));
		} else {
			sprintf (buf, "%.2f %s", timecode_frames, (_session->timecode_drop_frames() ? "D" : ""));
		}

		supplemental_right->set_text (_text_cells[LowerRight2], buf);
	}
}

void
AudioClock::set_bbt (framepos_t when, bool force)
{
	char buf[16];
	Timecode::BBT_Time BBT;

	if (_off) {
		display->set_text (_text_cells[Bars], "--");
		display->set_text (_text_cells[Beats], "--");
		display->set_text (_text_cells[Ticks], "--");

		if (supplemental_left) {
			supplemental_left->set_text (_text_cells[LowerLeft2], "");
			supplemental_right->set_text (_text_cells[LowerRight2], "");
		}
		
		return;
	}

	/* 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, "%0*" PRIu32, field_length[Bars], BBT.bars);
	if (force || _text_cells[Bars]->get_text () != buf) {
		display->set_text (_text_cells[Bars], buf);
	}
	sprintf (buf, "%0*" PRIu32, field_length[Beats], BBT.beats);
	if (force || _text_cells[Beats]->get_text () != buf) {
		display->set_text (_text_cells[Beats], buf);
	}
	sprintf (buf, "%0*" PRIu32, field_length[Ticks], BBT.ticks);
	if (force || _text_cells[Ticks]->get_text () != buf) {
		display->set_text (_text_cells[Ticks], buf);
	}

	if (supplemental_right) {
		framepos_t pos;

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

		TempoMetric m (_session->tempo_map().metric_at (pos));

		sprintf (buf, "%-5.2f", m.tempo().beats_per_minute());
		supplemental_left->set_text (_text_cells[LowerLeft2], buf);

		sprintf (buf, "%g|%g", m.meter().beats_per_bar(), m.meter().note_divisor());
		supplemental_right->set_text (_text_cells[LowerRight2], buf);
	}
}

void
AudioClock::set_session (Session *s)
{
	SessionHandlePtr::set_session (s);

	if (_session) {

		_session->config.ParameterChanged.connect (_session_connections, invalidator (*this), boost::bind (&AudioClock::session_configuration_changed, this, _1), gui_context());

		const XMLProperty* prop;
		XMLNode* node = _session->extra_xml (X_("ClockModes"));
		AudioClock::Mode amode;

		if (node) {
			for (XMLNodeList::const_iterator i = node->children().begin(); i != node->children().end(); ++i) {
				if ((prop = (*i)->property (X_("name"))) && prop->value() == _name) {

					if ((prop = (*i)->property (X_("mode"))) != 0) {
						amode = AudioClock::Mode (string_2_enum (prop->value(), amode));
						set_mode (amode);
					}
					if ((prop = (*i)->property (X_("on"))) != 0) {
						set_off (!string_is_affirmative (prop->value()));
					}
					break;
				}
			}
		}

		set (last_when, true);
	}
}

void
AudioClock::edit_next_field ()
{
	/* move on to the next field.
	 */
	
	switch (editing_field) {
		
		/* Timecode */
		
	case Timecode_Hours:
		editing_field = Timecode_Minutes;
		display->start_editing (_text_cells[Timecode_Minutes]);
		break;
	case Timecode_Minutes:
		editing_field = Timecode_Seconds;
		display->start_editing (_text_cells[Timecode_Seconds]);
		break;
	case Timecode_Seconds:
		editing_field = Timecode_Frames;
		display->start_editing (_text_cells[Timecode_Frames]);
		break;
	case Timecode_Frames:
		end_edit ();
		break;
		
		/* Min:Sec */
		
	case MS_Hours:
		editing_field = MS_Minutes;
		display->start_editing (_text_cells[MS_Minutes]);
		break;
	case MS_Minutes:
		editing_field = MS_Seconds;
		display->start_editing (_text_cells[MS_Seconds]);
		break;
	case MS_Seconds:
		editing_field = MS_Milliseconds;
		display->start_editing (_text_cells[MS_Milliseconds]);
		break;
	case MS_Milliseconds:
		end_edit ();
		break;
		
		/* BBT */
		
	case Bars:
		editing_field = Beats;
		display->start_editing (_text_cells[Beats]);
		break;
	case Beats:
		editing_field = Ticks;
		display->start_editing (_text_cells[Ticks]);
		break;
	case Ticks:
		end_edit ();
		break;
		
		/* audio frames */
	case AudioFrames:
		end_edit ();
		break;
		
	default:
		break;
	}

	key_entry_state = 0;
}

bool
AudioClock::on_key_press_event (GdkEventKey* ev)
{
	/* return true for keys that we MIGHT use 
	   at release
	*/
	switch (ev->keyval) {
	case GDK_0:
	case GDK_KP_0:
	case GDK_1:
	case GDK_KP_1:
	case GDK_2:
	case GDK_KP_2:
	case GDK_3:
	case GDK_KP_3:
	case GDK_4:
	case GDK_KP_4:
	case GDK_5:
	case GDK_KP_5:
	case GDK_6:
	case GDK_KP_6:
	case GDK_7:
	case GDK_KP_7:
	case GDK_8:
	case GDK_KP_8:
	case GDK_9:
	case GDK_KP_9:
	case GDK_period:
	case GDK_comma:
	case GDK_KP_Decimal:
	case GDK_Tab:
	case GDK_Return:
	case GDK_KP_Enter:
	case GDK_Escape:
		return true;
	default:
		return false;
	}
}

bool
AudioClock::on_key_release_event (GdkEventKey *ev)
{
	if (editing_field == 0) {
		return false;
	}

	CairoTextCell *cell = _text_cells[editing_field];

	if (!cell) {
		return false;
	}

	string new_text;
	char new_char = 0;
	bool move_on = 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_comma:
	case GDK_KP_Decimal:
		if (_mode == MinSec && editing_field == MS_Seconds) {
			new_char = '.'; // XXX i18n
		} else {
			return false;
		}
		break;

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

	case GDK_Escape:
		end_edit ();
		ChangeAborted();  /*  EMIT SIGNAL  */
		return true;

	default:
		return false;
	}

	if (!move_on) {

		if (key_entry_state == 0) {

			/* initialize with a fresh new string */

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

		} else {

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

		new_text += new_char;
		display->set_text (cell, new_text);
		_canonical_time_is_displayed = true;
		key_entry_state++;
	}

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

	if (move_on) {

		if (key_entry_state) {

			/* if key_entry_state != then we edited the text
			 */

			char buf[16];

			switch (editing_field) {
			case Timecode_Hours:
			case Timecode_Minutes:
			case Timecode_Seconds:
			case Timecode_Frames:
				// Check Timecode fields for sanity (may also adjust fields)
				timecode_sanitize_display();
				break;
			case Bars:
			case Beats:
			case Ticks:
				// Bars should never be zero, unless this clock is for a duration
				if (atoi (_text_cells[Bars]->get_text()) == 0 && !is_duration) {
					snprintf (buf, sizeof (buf), "%0*" PRIu32, field_length[Bars], 1);
					display->set_text (_text_cells[Bars], buf);
					_canonical_time_is_displayed = true;
				}
				//  beats should never be zero, unless this clock is for a duration
				if (atoi (_text_cells[Beats]->get_text()) == 0 && !is_duration) {
					snprintf (buf, sizeof (buf), "%0*" PRIu32, field_length[Beats], 1);
					display->set_text (_text_cells[Beats], buf);
					_canonical_time_is_displayed = true;
				}
				break;
			default:
				break;
			}

			ValueChanged(); /* EMIT_SIGNAL */
		}
		
		edit_next_field ();
	}

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

	return true;
}

bool
AudioClock::button_press (GdkEventButton *ev, CairoCell* cell)
{
	switch (ev->button) {
	case 1:
		if (editable) {
			if (cell) {
				Field f = (Field) cell->id ();
				switch (f) {
				case Timecode_Hours:
				case Timecode_Minutes:
				case Timecode_Seconds:
				case Timecode_Frames:
				case MS_Hours:
				case MS_Minutes:
				case MS_Seconds:
				case MS_Milliseconds:
				case Bars:
				case Beats:
				case Ticks:
				case AudioFrames:
					editing_field = f;
					display->start_editing (cell);
					break;
				default:
					return false;
				}
			}
			
			Keyboard::magic_widget_grab_focus ();
			
			/* 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;
		
	default:
		return false;
		break;
	}

	return true;
}

bool
AudioClock::button_release (GdkEventButton *ev, CairoCell* cell)
{
	if (editable) {
		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 (Keyboard::is_context_menu_event (ev)) {
		if (ops_menu == 0) {
			build_ops_menu ();
		}
		ops_menu->popup (1, ev->time);
		return true;
	}

	return false;
}

bool
AudioClock::scroll (GdkEventScroll *ev, CairoCell* cell)
{
	if (_session == 0 || !editable) {
		return false;
	}

	if (cell) {
		Field f = (Field) cell->id ();
		switch (f) {
		case Timecode_Hours:
		case Timecode_Minutes:
		case Timecode_Seconds:
		case Timecode_Frames:
		case MS_Hours:
		case MS_Minutes:
		case MS_Seconds:
		case MS_Milliseconds:
		case Bars:
		case Beats:
		case Ticks:
		case AudioFrames:
			break;
		default:
			return false;
		}
	}
			
	framepos_t frames = 0;

	switch (ev->direction) {

	case GDK_SCROLL_UP:
		frames = get_frames ((Field) cell->id());
		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) cell->id());
		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) {

		framepos_t frames;
		framepos_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 ((framepos_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;
}

framepos_t
AudioClock::get_frames (Field field, framepos_t pos, int dir)
{
	framecnt_t f = 0;
	Timecode::BBT_Time BBT;
	switch (field) {
	case Timecode_Hours:
		f = (framecnt_t) floor (3600.0 * _session->frame_rate());
		break;
	case Timecode_Minutes:
		f = (framecnt_t) floor (60.0 * _session->frame_rate());
		break;
	case Timecode_Seconds:
		f = _session->frame_rate();
		break;
	case Timecode_Frames:
		f = (framecnt_t) floor (_session->frame_rate() / _session->timecode_frames_per_second());
		break;

	case AudioFrames:
		f = 1;
		break;

	case MS_Hours:
		f = (framecnt_t) floor (3600.0 * _session->frame_rate());
		break;
	case MS_Minutes:
		f = (framecnt_t) floor (60.0 * _session->frame_rate());
		break;
	case MS_Seconds:
		f = (framecnt_t) _session->frame_rate();
		break;
	case MS_Milliseconds:
		f = (framecnt_t) floor (_session->frame_rate() / 1000.0);
		break;

	case Bars:
		BBT.bars = 1;
		BBT.beats = 0;
		BBT.ticks = 0;
		f = _session->tempo_map().bbt_duration_at (pos,BBT,dir);
		break;
	case Beats:
		BBT.bars = 0;
		BBT.beats = 1;
		BBT.ticks = 0;
		f = _session->tempo_map().bbt_duration_at(pos,BBT,dir);
		break;
	case Ticks:
		BBT.bars = 0;
		BBT.beats = 0;
		BBT.ticks = 1;
		f = _session->tempo_map().bbt_duration_at(pos,BBT,dir);
		break;
	default:
		error << string_compose (_("programming error: %1"), "attempt to get frames from non-text field!") << endmsg;
		f = 0;
		break;
	}

	return f;
}

framepos_t
AudioClock::current_time (framepos_t pos) const
{
	if (!_canonical_time_is_displayed) {
		return _canonical_time;
	}

	framepos_t ret = 0;

	switch (_mode) {
	case Timecode:
		ret = timecode_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;
	}

	return ret;
}

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

	switch (_mode) {
	case Timecode:
		ret = timecode_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;
	}

	return ret;
}

void
AudioClock::timecode_sanitize_display()
{
	// Check Timecode fields for sanity, possibly adjusting values
	if (atoi (_text_cells[Timecode_Minutes]->get_text()) > 59) {
		display->set_text (_text_cells[Timecode_Minutes], "59");
		_canonical_time_is_displayed = true;
	}

	if (atoi (_text_cells[Timecode_Seconds]->get_text()) > 59) {
		display->set_text (_text_cells[Timecode_Seconds], "59");
		_canonical_time_is_displayed = true;
	}

	switch ((long)rint(_session->timecode_frames_per_second())) {
	case 24:
		if (atoi (_text_cells[Timecode_Frames]->get_text()) > 23) {
			display->set_text (_text_cells[Timecode_Frames], "23");
			_canonical_time_is_displayed = true;
		}
		break;
	case 25:
		if (atoi (_text_cells[Timecode_Frames]->get_text()) > 24) {
			display->set_text (_text_cells[Timecode_Frames], "24");
			_canonical_time_is_displayed = true;
		}
		break;
	case 30:
		if (atoi (_text_cells[Timecode_Frames]->get_text()) > 29) {
			display->set_text (_text_cells[Timecode_Frames], "29");
			_canonical_time_is_displayed = true;
		}
		break;
	default:
		break;
	}

	if (_session->timecode_drop_frames()) {
		if ((atoi (_text_cells[Timecode_Minutes]->get_text()) % 10) && (atoi (_text_cells[Timecode_Seconds]->get_text()) == 0) && (atoi (_text_cells[Timecode_Frames]->get_text()) < 2)) {
			display->set_text (_text_cells[Timecode_Frames], "02");
			_canonical_time_is_displayed = true;
		}
	}
}

/** This is necessary because operator[] isn't const with std::map.
 *  @param f Field.
 *  @return Label widget.
 */
CairoTextCell*
AudioClock::label (Field f) const
{
	std::map<Field,CairoTextCell*>::const_iterator i = _text_cells.find (f);
	assert (i != _text_cells.end ());

	return i->second;
}

framepos_t
AudioClock::timecode_frame_from_display () const
{
	if (_session == 0) {
		return 0;
	}

	Timecode::Time TC;
	framepos_t sample;

	if (!label (Timecode_Sign)->get_text().empty()) {
		TC.hours = atoi (label (Timecode_Hours)->get_text());
	} else {
		TC.hours = -atoi (label (Timecode_Hours)->get_text());
	}

	TC.minutes = atoi (label (Timecode_Minutes)->get_text());
	TC.seconds = atoi (label (Timecode_Seconds)->get_text());
	TC.frames = atoi (label (Timecode_Frames)->get_text());
	TC.rate = _session->timecode_frames_per_second();
	TC.drop= _session->timecode_drop_frames();

	_session->timecode_to_sample (TC, sample, false /* use_offset */, false /* use_subframes */ );


#if 0
#define Timecode_SAMPLE_TEST_1
#define Timecode_SAMPLE_TEST_2
#define Timecode_SAMPLE_TEST_3
#define Timecode_SAMPLE_TEST_4
#define Timecode_SAMPLE_TEST_5
#define Timecode_SAMPLE_TEST_6
#define Timecode_SAMPLE_TEST_7

	// Testcode for timecode<->sample conversions (P.S.)
	Timecode::Time timecode1;
	framepos_t sample1;
	framepos_t oldsample = 0;
	Timecode::Time timecode2;
	framecnt_t sample_increment;

	sample_increment = (framecnt_t)rint(_session->frame_rate() / _session->timecode_frames_per_second);

#ifdef Timecode_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->timecode_to_sample( timecode1, sample1, false /* use_offset */, false /* use_subframes */ );
		_session->sample_to_timecode( sample1, timecode2, 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 << "timecode1: " << timecode1.hours << ":" << timecode1.minutes << ":" << timecode1.seconds << ":" << timecode1.frames << "::" << timecode1.subframes << " -> ";
			cout << "sample: " << sample1 << endl;
			cout << "sample: " << sample1 << " -> ";
			cout << "timecode2: " << timecode2.hours << ":" << timecode2.minutes << ":" << timecode2.seconds << ":" << timecode2.frames << "::" << timecode2.subframes << endl;
			break;
		}

		if (timecode2.hours != timecode1.hours || timecode2.minutes != timecode1.minutes || timecode2.seconds != timecode2.seconds || timecode2.frames != timecode1.frames) {
			cout << "ERROR: timecode2 not equal timecode1" << endl;
			cout << "timecode1: " << timecode1.hours << ":" << timecode1.minutes << ":" << timecode1.seconds << ":" << timecode1.frames << "::" << timecode1.subframes << " -> ";
			cout << "sample: " << sample1 << endl;
			cout << "sample: " << sample1 << " -> ";
			cout << "timecode2: " << timecode2.hours << ":" << timecode2.minutes << ":" << timecode2.seconds << ":" << timecode2.frames << "::" << timecode2.subframes << endl;
			break;
		}
		oldsample = sample1;
		_session->timecode_increment( timecode1 );
	}

	cout << "sample_increment: " << sample_increment << endl;
	cout << "sample: " << sample1 << " -> ";
	cout << "timecode: " << timecode2.hours << ":" << timecode2.minutes << ":" << timecode2.seconds << ":" << timecode2.frames << "::" << timecode2.subframes << endl;
#endif

#ifdef Timecode_SAMPLE_TEST_2
	// Test 2: use_offset = true, use_subframes = false
	cout << "use_offset = true, use_subframes = false" << endl;

	timecode1.hours = 0;
	timecode1.minutes = 0;
	timecode1.seconds = 0;
	timecode1.frames = 0;
	timecode1.subframes = 0;
	sample1 = oldsample = 0;

	_session->sample_to_timecode( sample1, timecode1, true /* use_offset */, false /* use_subframes */ );
	cout << "Starting at sample: " << sample1 << " -> ";
	cout << "timecode: " << (timecode1.negative ? "-" : "") << timecode1.hours << ":" << timecode1.minutes << ":" << timecode1.seconds << ":" << timecode1.frames << "::" << timecode1.subframes << endl;

	for (int i = 0; i < 108003; i++) {
		_session->timecode_to_sample( timecode1, sample1, true /* use_offset */, false /* use_subframes */ );
		_session->sample_to_timecode( sample1, timecode2, true /* use_offset */, false /* use_subframes */ );

//     cout << "timecode: " << (timecode1.negative ? "-" : "") << timecode1.hours << ":" << timecode1.minutes << ":" << timecode1.seconds << ":" << timecode1.frames << "::" << timecode1.subframes << " -> ";
//     cout << "sample: " << sample1 << endl;
//     cout << "sample: " << sample1 << " -> ";
//     cout << "timecode: " << (timecode2.negative ? "-" : "") << timecode2.hours << ":" << timecode2.minutes << ":" << timecode2.seconds << ":" << timecode2.frames << "::" << timecode2.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 << "timecode1: " << (timecode1.negative ? "-" : "") << timecode1.hours << ":" << timecode1.minutes << ":" << timecode1.seconds << ":" << timecode1.frames << "::" << timecode1.subframes << " -> ";
			cout << "sample: " << sample1 << endl;
			cout << "sample: " << sample1 << " -> ";
			cout << "timecode2: " << (timecode2.negative ? "-" : "") << timecode2.hours << ":" << timecode2.minutes << ":" << timecode2.seconds << ":" << timecode2.frames << "::" << timecode2.subframes << endl;
			break;
		}

		if (timecode2.hours != timecode1.hours || timecode2.minutes != timecode1.minutes || timecode2.seconds != timecode2.seconds || timecode2.frames != timecode1.frames) {
			cout << "ERROR: timecode2 not equal timecode1" << endl;
			cout << "timecode1: " << (timecode1.negative ? "-" : "") << timecode1.hours << ":" << timecode1.minutes << ":" << timecode1.seconds << ":" << timecode1.frames << "::" << timecode1.subframes << " -> ";
			cout << "sample: " << sample1 << endl;
			cout << "sample: " << sample1 << " -> ";
			cout << "timecode2: " << (timecode2.negative ? "-" : "") << timecode2.hours << ":" << timecode2.minutes << ":" << timecode2.seconds << ":" << timecode2.frames << "::" << timecode2.subframes << endl;
			break;
		}
		oldsample = sample1;
		_session->timecode_increment( timecode1 );
	}

	cout << "sample_increment: " << sample_increment << endl;
	cout << "sample: " << sample1 << " -> ";
	cout << "timecode: " << (timecode2.negative ? "-" : "") << timecode2.hours << ":" << timecode2.minutes << ":" << timecode2.seconds << ":" << timecode2.frames << "::" << timecode2.subframes << endl;
#endif

#ifdef Timecode_SAMPLE_TEST_3
	// Test 3: use_offset = true, use_subframes = false, decrement
	cout << "use_offset = true, use_subframes = false, decrement" << endl;

	_session->sample_to_timecode( sample1, timecode1, true /* use_offset */, false /* use_subframes */ );
	cout << "Starting at sample: " << sample1 << " -> ";
	cout << "timecode: " << (timecode1.negative ? "-" : "") << timecode1.hours << ":" << timecode1.minutes << ":" << timecode1.seconds << ":" << timecode1.frames << "::" << timecode1.subframes << endl;

	for (int i = 0; i < 108003; i++) {
		_session->timecode_to_sample( timecode1, sample1, true /* use_offset */, false /* use_subframes */ );
		_session->sample_to_timecode( sample1, timecode2, true /* use_offset */, false /* use_subframes */ );

//     cout << "timecode: " << (timecode1.negative ? "-" : "") << timecode1.hours << ":" << timecode1.minutes << ":" << timecode1.seconds << ":" << timecode1.frames << "::" << timecode1.subframes << " -> ";
//     cout << "sample: " << sample1 << endl;
//     cout << "sample: " << sample1 << " -> ";
//     cout << "timecode: " << (timecode2.negative ? "-" : "") << timecode2.hours << ":" << timecode2.minutes << ":" << timecode2.seconds << ":" << timecode2.frames << "::" << timecode2.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 << "timecode1: " << (timecode1.negative ? "-" : "") << timecode1.hours << ":" << timecode1.minutes << ":" << timecode1.seconds << ":" << timecode1.frames << "::" << timecode1.subframes << " -> ";
			cout << "sample: " << sample1 << endl;
			cout << "sample: " << sample1 << " -> ";
			cout << "timecode2: " << (timecode2.negative ? "-" : "") << timecode2.hours << ":" << timecode2.minutes << ":" << timecode2.seconds << ":" << timecode2.frames << "::" << timecode2.subframes << endl;
			break;
		}

		if (timecode2.hours != timecode1.hours || timecode2.minutes != timecode1.minutes || timecode2.seconds != timecode2.seconds || timecode2.frames != timecode1.frames) {
			cout << "ERROR: timecode2 not equal timecode1" << endl;
			cout << "timecode1: " << (timecode1.negative ? "-" : "") << timecode1.hours << ":" << timecode1.minutes << ":" << timecode1.seconds << ":" << timecode1.frames << "::" << timecode1.subframes << " -> ";
			cout << "sample: " << sample1 << endl;
			cout << "sample: " << sample1 << " -> ";
			cout << "timecode2: " << (timecode2.negative ? "-" : "") << timecode2.hours << ":" << timecode2.minutes << ":" << timecode2.seconds << ":" << timecode2.frames << "::" << timecode2.subframes << endl;
			break;
		}
		oldsample = sample1;
		_session->timecode_decrement( timecode1 );
	}

	cout << "sample_decrement: " << sample_increment << endl;
	cout << "sample: " << sample1 << " -> ";
	cout << "timecode: " << (timecode2.negative ? "-" : "") << timecode2.hours << ":" << timecode2.minutes << ":" << timecode2.seconds << ":" << timecode2.frames << "::" << timecode2.subframes << endl;
#endif


#ifdef Timecode_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) {
		timecode1.hours = 0;
		timecode1.minutes = 0;
		timecode1.seconds = 0;
		timecode1.frames = 0;
		timecode1.subframes = 0;
		sample1 = oldsample = (sample_increment * sub) / 80;

		_session->sample_to_timecode( sample1, timecode1, true /* use_offset */, true /* use_subframes */ );

		cout << "starting at sample: " << sample1 << " -> ";
		cout << "timecode: " << (timecode1.negative ? "-" : "") << timecode1.hours << ":" << timecode1.minutes << ":" << timecode1.seconds << ":" << timecode1.frames << "::" << timecode1.subframes << endl;

		for (int i = 0; i < 108003; i++) {
			_session->timecode_to_sample( timecode1, sample1, true /* use_offset */, true /* use_subframes */ );
			_session->sample_to_timecode( sample1, timecode2, 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 << "timecode1: " << (timecode1.negative ? "-" : "") << timecode1.hours << ":" << timecode1.minutes << ":" << timecode1.seconds << ":" << timecode1.frames << "::" << timecode1.subframes << " -> ";
				cout << "sample: " << sample1 << endl;
				cout << "sample: " << sample1 << " -> ";
				cout << "timecode2: " << (timecode2.negative ? "-" : "") << timecode2.hours << ":" << timecode2.minutes << ":" << timecode2.seconds << ":" << timecode2.frames << "::" << timecode2.subframes << endl;
				//break;
			}

			if (timecode2.hours != timecode1.hours || timecode2.minutes != timecode1.minutes || timecode2.seconds != timecode2.seconds || timecode2.frames != timecode1.frames || timecode2.subframes != timecode1.subframes) {
				cout << "ERROR: timecode2 not equal timecode1" << endl;
				cout << "timecode1: " << (timecode1.negative ? "-" : "") << timecode1.hours << ":" << timecode1.minutes << ":" << timecode1.seconds << ":" << timecode1.frames << "::" << timecode1.subframes << " -> ";
				cout << "sample: " << sample1 << endl;
				cout << "sample: " << sample1 << " -> ";
				cout << "timecode2: " << (timecode2.negative ? "-" : "") << timecode2.hours << ":" << timecode2.minutes << ":" << timecode2.seconds << ":" << timecode2.frames << "::" << timecode2.subframes << endl;
				break;
			}
			oldsample = sample1;
			_session->timecode_increment( timecode1 );
		}

		cout << "sample_increment: " << sample_increment << endl;
		cout << "sample: " << sample1 << " -> ";
		cout << "timecode: " << (timecode2.negative ? "-" : "") << timecode2.hours << ":" << timecode2.minutes << ":" << timecode2.seconds << ":" << timecode2.frames << "::" << timecode2.subframes << endl;

		for (int i = 0; i < 108003; i++) {
			_session->timecode_to_sample( timecode1, sample1, true /* use_offset */, true /* use_subframes */ );
			_session->sample_to_timecode( sample1, timecode2, 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 << "timecode1: " << (timecode1.negative ? "-" : "") << timecode1.hours << ":" << timecode1.minutes << ":" << timecode1.seconds << ":" << timecode1.frames << "::" << timecode1.subframes << " -> ";
				cout << "sample: " << sample1 << endl;
				cout << "sample: " << sample1 << " -> ";
				cout << "timecode2: " << (timecode2.negative ? "-" : "") << timecode2.hours << ":" << timecode2.minutes << ":" << timecode2.seconds << ":" << timecode2.frames << "::" << timecode2.subframes << endl;
				//break;
			}

			if (timecode2.hours != timecode1.hours || timecode2.minutes != timecode1.minutes || timecode2.seconds != timecode2.seconds || timecode2.frames != timecode1.frames || timecode2.subframes != timecode1.subframes) {
				cout << "ERROR: timecode2 not equal timecode1" << endl;
				cout << "timecode1: " << (timecode1.negative ? "-" : "") << timecode1.hours << ":" << timecode1.minutes << ":" << timecode1.seconds << ":" << timecode1.frames << "::" << timecode1.subframes << " -> ";
				cout << "sample: " << sample1 << endl;
				cout << "sample: " << sample1 << " -> ";
				cout << "timecode2: " << (timecode2.negative ? "-" : "") << timecode2.hours << ":" << timecode2.minutes << ":" << timecode2.seconds << ":" << timecode2.frames << "::" << timecode2.subframes << endl;
				break;
			}
			oldsample = sample1;
			_session->timecode_decrement( timecode1 );
		}

		cout << "sample_decrement: " << sample_increment << endl;
		cout << "sample: " << sample1 << " -> ";
		cout << "timecode: " << (timecode2.negative ? "-" : "") << timecode2.hours << ":" << timecode2.minutes << ":" << timecode2.seconds << ":" << timecode2.frames << "::" << timecode2.subframes << endl;
	}
#endif


#ifdef Timecode_SAMPLE_TEST_5
	// Test 5: use_offset = true, use_subframes = false, increment seconds
	cout << "use_offset = true, use_subframes = false, increment seconds" << endl;

	timecode1.hours = 0;
	timecode1.minutes = 0;
	timecode1.seconds = 0;
	timecode1.frames = 0;
	timecode1.subframes = 0;
	sample1 = oldsample = 0;
	sample_increment = _session->frame_rate();

	_session->sample_to_timecode( sample1, timecode1, true /* use_offset */, false /* use_subframes */ );
	cout << "Starting at sample: " << sample1 << " -> ";
	cout << "timecode: " << (timecode1.negative ? "-" : "") << timecode1.hours << ":" << timecode1.minutes << ":" << timecode1.seconds << ":" << timecode1.frames << "::" << timecode1.subframes << endl;

	for (int i = 0; i < 3600; i++) {
		_session->timecode_to_sample( timecode1, sample1, true /* use_offset */, false /* use_subframes */ );
		_session->sample_to_timecode( sample1, timecode2, true /* use_offset */, false /* use_subframes */ );

//     cout << "timecode: " << (timecode1.negative ? "-" : "") << timecode1.hours << ":" << timecode1.minutes << ":" << timecode1.seconds << ":" << timecode1.frames << "::" << timecode1.subframes << " -> ";
//     cout << "sample: " << sample1 << endl;
//     cout << "sample: " << sample1 << " -> ";
//     cout << "timecode: " << (timecode2.negative ? "-" : "") << timecode2.hours << ":" << timecode2.minutes << ":" << timecode2.seconds << ":" << timecode2.frames << "::" << timecode2.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 (timecode2.hours != timecode1.hours || timecode2.minutes != timecode1.minutes || timecode2.seconds != timecode2.seconds || timecode2.frames != timecode1.frames) {
			cout << "ERROR: timecode2 not equal timecode1" << endl;
			cout << "timecode: " << (timecode1.negative ? "-" : "") << timecode1.hours << ":" << timecode1.minutes << ":" << timecode1.seconds << ":" << timecode1.frames << "::" << timecode1.subframes << " -> ";
			cout << "sample: " << sample1 << endl;
			cout << "sample: " << sample1 << " -> ";
			cout << "timecode: " << (timecode2.negative ? "-" : "") << timecode2.hours << ":" << timecode2.minutes << ":" << timecode2.seconds << ":" << timecode2.frames << "::" << timecode2.subframes << endl;
			break;
		}
		oldsample = sample1;
		_session->timecode_increment_seconds( timecode1 );
	}

	cout << "sample_increment: " << sample_increment << endl;
	cout << "sample: " << sample1 << " -> ";
	cout << "timecode: " << (timecode2.negative ? "-" : "") << timecode2.hours << ":" << timecode2.minutes << ":" << timecode2.seconds << ":" << timecode2.frames << "::" << timecode2.subframes << endl;
#endif


#ifdef Timecode_SAMPLE_TEST_6
	// Test 6: use_offset = true, use_subframes = false, increment minutes
	cout << "use_offset = true, use_subframes = false, increment minutes" << endl;

	timecode1.hours = 0;
	timecode1.minutes = 0;
	timecode1.seconds = 0;
	timecode1.frames = 0;
	timecode1.subframes = 0;
	sample1 = oldsample = 0;
	sample_increment = _session->frame_rate() * 60;

	_session->sample_to_timecode( sample1, timecode1, true /* use_offset */, false /* use_subframes */ );
	cout << "Starting at sample: " << sample1 << " -> ";
	cout << "timecode: " << (timecode1.negative ? "-" : "") << timecode1.hours << ":" << timecode1.minutes << ":" << timecode1.seconds << ":" << timecode1.frames << "::" << timecode1.subframes << endl;

	for (int i = 0; i < 60; i++) {
		_session->timecode_to_sample( timecode1, sample1, true /* use_offset */, false /* use_subframes */ );
		_session->sample_to_timecode( sample1, timecode2, true /* use_offset */, false /* use_subframes */ );

//     cout << "timecode: " << (timecode1.negative ? "-" : "") << timecode1.hours << ":" << timecode1.minutes << ":" << timecode1.seconds << ":" << timecode1.frames << "::" << timecode1.subframes << " -> ";
//     cout << "sample: " << sample1 << endl;
//     cout << "sample: " << sample1 << " -> ";
//     cout << "timecode: " << (timecode2.negative ? "-" : "") << timecode2.hours << ":" << timecode2.minutes << ":" << timecode2.seconds << ":" << timecode2.frames << "::" << timecode2.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 (timecode2.hours != timecode1.hours || timecode2.minutes != timecode1.minutes || timecode2.seconds != timecode2.seconds || timecode2.frames != timecode1.frames) {
			cout << "ERROR: timecode2 not equal timecode1" << endl;
			cout << "timecode: " << (timecode1.negative ? "-" : "") << timecode1.hours << ":" << timecode1.minutes << ":" << timecode1.seconds << ":" << timecode1.frames << "::" << timecode1.subframes << " -> ";
			cout << "sample: " << sample1 << endl;
			cout << "sample: " << sample1 << " -> ";
			cout << "timecode: " << (timecode2.negative ? "-" : "") << timecode2.hours << ":" << timecode2.minutes << ":" << timecode2.seconds << ":" << timecode2.frames << "::" << timecode2.subframes << endl;
			break;
		}
		oldsample = sample1;
		_session->timecode_increment_minutes( timecode1 );
	}

	cout << "sample_increment: " << sample_increment << endl;
	cout << "sample: " << sample1 << " -> ";
	cout << "timecode: " << (timecode2.negative ? "-" : "") << timecode2.hours << ":" << timecode2.minutes << ":" << timecode2.seconds << ":" << timecode2.frames << "::" << timecode2.subframes << endl;
#endif

#ifdef Timecode_SAMPLE_TEST_7
	// Test 7: use_offset = true, use_subframes = false, increment hours
	cout << "use_offset = true, use_subframes = false, increment hours" << endl;

	timecode1.hours = 0;
	timecode1.minutes = 0;
	timecode1.seconds = 0;
	timecode1.frames = 0;
	timecode1.subframes = 0;
	sample1 = oldsample = 0;
	sample_increment = _session->frame_rate() * 60 * 60;

	_session->sample_to_timecode( sample1, timecode1, true /* use_offset */, false /* use_subframes */ );
	cout << "Starting at sample: " << sample1 << " -> ";
	cout << "timecode: " << (timecode1.negative ? "-" : "") << timecode1.hours << ":" << timecode1.minutes << ":" << timecode1.seconds << ":" << timecode1.frames << "::" << timecode1.subframes << endl;

	for (int i = 0; i < 10; i++) {
		_session->timecode_to_sample( timecode1, sample1, true /* use_offset */, false /* use_subframes */ );
		_session->sample_to_timecode( sample1, timecode2, true /* use_offset */, false /* use_subframes */ );

//     cout << "timecode: " << (timecode1.negative ? "-" : "") << timecode1.hours << ":" << timecode1.minutes << ":" << timecode1.seconds << ":" << timecode1.frames << "::" << timecode1.subframes << " -> ";
//     cout << "sample: " << sample1 << endl;
//     cout << "sample: " << sample1 << " -> ";
//     cout << "timecode: " << (timecode2.negative ? "-" : "") << timecode2.hours << ":" << timecode2.minutes << ":" << timecode2.seconds << ":" << timecode2.frames << "::" << timecode2.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 (timecode2.hours != timecode1.hours || timecode2.minutes != timecode1.minutes || timecode2.seconds != timecode2.seconds || timecode2.frames != timecode1.frames) {
			cout << "ERROR: timecode2 not equal timecode1" << endl;
			cout << "timecode: " << (timecode1.negative ? "-" : "") << timecode1.hours << ":" << timecode1.minutes << ":" << timecode1.seconds << ":" << timecode1.frames << "::" << timecode1.subframes << " -> ";
			cout << "sample: " << sample1 << endl;
			cout << "sample: " << sample1 << " -> ";
			cout << "timecode: " << (timecode2.negative ? "-" : "") << timecode2.hours << ":" << timecode2.minutes << ":" << timecode2.seconds << ":" << timecode2.frames << "::" << timecode2.subframes << endl;
			break;
		}
		oldsample = sample1;
		_session->timecode_increment_hours( timecode1 );
	}

	cout << "sample_increment: " << sample_increment << endl;
	cout << "sample: " << sample1 << " -> ";
	cout << "timecode: " << (timecode2.negative ? "-" : "") << timecode2.hours << ":" << timecode2.minutes << ":" << timecode2.seconds << ":" << timecode2.frames << "::" << timecode2.subframes << endl;
#endif

#endif

	return sample;
}

framepos_t
AudioClock::minsec_frame_from_display () const
{
	if (_session == 0) {
		return 0;
	}

	int hrs = atoi (label (MS_Hours)->get_text());
	int mins = atoi (label (MS_Minutes)->get_text());
	int secs = atoi (label (MS_Seconds)->get_text());
	int millisecs = atoi (label (MS_Milliseconds)->get_text());

	framecnt_t sr = _session->frame_rate();

	return (framepos_t) floor ((hrs * 60.0f * 60.0f * sr) + (mins * 60.0f * sr) + (secs * sr) + (millisecs * sr / 1000.0));
}

framepos_t
AudioClock::bbt_frame_from_display (framepos_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 (label (Bars)->get_text());
	any.bbt.beats = atoi (label (Beats)->get_text());
	any.bbt.ticks = atoi (label (Ticks)->get_text());

	if (is_duration) {
		any.bbt.bars++;
		any.bbt.beats++;
                return _session->any_duration_to_frames (pos, any);
	} else {
                return _session->convert_to_frames (any);
        }
}


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

	Timecode::BBT_Time bbt;


	bbt.bars = atoi (label (Bars)->get_text());
	bbt.beats = atoi (label (Beats)->get_text());
	bbt.ticks = atoi (label (Ticks)->get_text());

	return _session->tempo_map().bbt_duration_at(pos,bbt,1);
}

framepos_t
AudioClock::audio_frame_from_display () const
{
	return (framepos_t) atoi (label (AudioFrames)->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"), sigc::bind (sigc::mem_fun(*this, &AudioClock::set_mode), Timecode)));
	}
	ops_items.push_back (MenuElem (_("Bars:Beats"), sigc::bind (sigc::mem_fun(*this, &AudioClock::set_mode), BBT)));
	ops_items.push_back (MenuElem (_("Minutes:Seconds"), sigc::bind (sigc::mem_fun(*this, &AudioClock::set_mode), MinSec)));
	ops_items.push_back (MenuElem (_("Samples"), sigc::bind (sigc::mem_fun(*this, &AudioClock::set_mode), Frames)));

	if (editable && !is_duration && !_follows_playhead) {
		ops_items.push_back (SeparatorElem());
		ops_items.push_back (MenuElem (_("Set From Playhead"), sigc::mem_fun(*this, &AudioClock::set_from_playhead)));
		ops_items.push_back (MenuElem (_("Locate to This Time"), sigc::mem_fun(*this, &AudioClock::locate)));
	}
}

void
AudioClock::set_from_playhead ()
{
	if (!_session) {
		return;
	}

	set (_session->transport_frame());
	ValueChanged ();
}

void
AudioClock::locate ()
{
	if (!_session || is_duration) {
		return;
	}

	_session->request_locate (current_time(), _session->transport_rolling ());
}

void
AudioClock::connect_signals ()
{
	scroll_connection = display->scroll.connect (sigc::mem_fun (*this, &AudioClock::scroll));
	button_press_connection = display->button_press.connect (sigc::mem_fun (*this, &AudioClock::button_press));
	button_release_connection = display->button_release.connect (sigc::mem_fun (*this, &AudioClock::button_release));
}

void
AudioClock::set_mode (Mode m)
{
	if (_mode == m) {
		return;
	}

	_mode = m;

	display->clear_cells ();

	if (supplemental_left) {
		supplemental_left->clear_cells ();
		supplemental_right->clear_cells ();
	}

	switch (_mode) {
	case Timecode:
		display->add_cell (_text_cells[Timecode_Sign]);
		display->add_cell (_text_cells[Timecode_Hours]);
		display->add_cell (_fixed_cells[Colon1]);
		display->add_cell (_text_cells[Timecode_Minutes]);
		display->add_cell (_fixed_cells[Colon2]);
		display->add_cell (_text_cells[Timecode_Seconds]);
		display->add_cell (_fixed_cells[Colon3]);
		display->add_cell (_text_cells[Timecode_Frames]);

		if (supplemental_left) {
			supplemental_left->add_cell (_text_cells[LowerLeft1]);
			supplemental_left->add_cell (_text_cells[LowerLeft2]);
			supplemental_right->add_cell (_text_cells[LowerRight1]);
			supplemental_right->add_cell (_text_cells[LowerRight2]);

			supplemental_left->set_width_chars (_text_cells[LowerLeft1], 4);
			supplemental_left->set_width_chars (_text_cells[LowerLeft2], 8);

			supplemental_right->set_width_chars (_text_cells[LowerRight1], 4);
			supplemental_right->set_width_chars (_text_cells[LowerRight2], 6.25);

			supplemental_left->set_text (_text_cells[LowerLeft1], _("EXT"));
			supplemental_right->set_text (_text_cells[LowerRight1], _("FPS"));
		}
		break;

	case BBT:
		display->add_cell (_text_cells[Bars]);
		display->add_cell (_fixed_cells[Bar1]);
		display->add_cell (_text_cells[Beats]);
		display->add_cell (_fixed_cells[Bar2]);
		display->add_cell (_text_cells[Ticks]);
		if (supplemental_left) {
			supplemental_left->add_cell (_text_cells[LowerLeft1]);
			supplemental_left->add_cell (_text_cells[LowerLeft2]);
			supplemental_right->add_cell (_text_cells[LowerRight1]);
			supplemental_right->add_cell (_text_cells[LowerRight2]);

			supplemental_left->set_width_chars (_text_cells[LowerLeft1], 1); 
			supplemental_left->set_width_chars (_text_cells[LowerLeft2], 5.25);

			supplemental_right->set_width_chars (_text_cells[LowerRight1], 2); // why not 1? M is too wide
			supplemental_right->set_width_chars (_text_cells[LowerRight2], 5);

			supplemental_left->set_text (_text_cells[LowerLeft1], _("T")); 
			supplemental_right->set_text (_text_cells[LowerRight1], _("M"));
		}
		break;

	case MinSec:
		display->add_cell (_text_cells[MS_Hours]);
		display->add_cell (_fixed_cells[Colon1]);
		display->add_cell (_text_cells[MS_Minutes]);
		display->add_cell (_fixed_cells[Colon2]);
		display->add_cell (_text_cells[MS_Seconds]);
		display->add_cell (_fixed_cells[Colon3]);
		display->add_cell (_text_cells[MS_Milliseconds]);
		if (supplemental_left) {
			supplemental_left->add_cell (_text_cells[LowerLeft1]);
			supplemental_left->add_cell (_text_cells[LowerLeft2]);
			supplemental_right->add_cell (_text_cells[LowerRight1]);
			supplemental_right->add_cell (_text_cells[LowerRight2]);

			/* These are going to remain empty */

			supplemental_left->set_width_chars (_text_cells[LowerLeft1], 1);
			supplemental_left->set_width_chars (_text_cells[LowerLeft2], 5);
			
			supplemental_right->set_width_chars (_text_cells[LowerRight1], 1);
			supplemental_right->set_width_chars (_text_cells[LowerRight2], 1);

			supplemental_left->set_text (_text_cells[LowerLeft1], _(" "));
			supplemental_right->set_text (_text_cells[LowerRight1], _(" "));
		}
		break;

	case Frames:
		display->add_cell (_text_cells[AudioFrames]);
		if (supplemental_left) {
			supplemental_left->add_cell (_text_cells[LowerLeft1]);
			supplemental_left->add_cell (_text_cells[LowerLeft2]);
			supplemental_right->add_cell (_text_cells[LowerRight1]);
			supplemental_right->add_cell (_text_cells[LowerRight2]);

			supplemental_left->set_width_chars (_text_cells[LowerLeft1], 3);
			supplemental_left->set_width_chars (_text_cells[LowerLeft2], 5);
			
			supplemental_right->set_width_chars (_text_cells[LowerRight1], 5);
			supplemental_right->set_width_chars (_text_cells[LowerRight2], 5);

			supplemental_left->set_text (_text_cells[LowerLeft1], _("SR"));
			supplemental_right->set_text (_text_cells[LowerRight1], _("Pull"));
		}
		break;
	}

	if (supplemental_left) {
		/* clear information cells */
		supplemental_left->set_text (_text_cells[LowerLeft2], _(""));
		supplemental_right->set_text (_text_cells[LowerRight2], _(""));
	}

	set (last_when, true);

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

        mode_changed (); /* EMIT SIGNAL (the member one) */
}

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

void
AudioClock::on_style_changed (const Glib::RefPtr<Gtk::Style>& old_style)
{
	VBox::on_style_changed (old_style);
	set_theme ();
}

void
AudioClock::set_is_duration (bool yn)
{
	if (yn == is_duration) {
		return;
	}

	is_duration = yn;
	set (last_when, true, 0, 's');
}

void
AudioClock::set_off (bool yn) 
{
	if (_off == yn) {
		return;
	}

	_off = yn;

	if (_off) {
		_canonical_time = current_time ();
		_canonical_time_is_displayed = false;
	} else {
		_canonical_time_is_displayed = true;
	}

	/* force a possible redraw */
	
	set (_canonical_time, true);
}