verbose_cursor.cc

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/*
    Copyright (C) 2000-2011 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 <string>
#include <gtkmm/enums.h>
#include "pbd/stacktrace.h"
#include "ardour/profile.h"

#include "canvas/debug.h"
#include "canvas/scroll_group.h"
#include "canvas/tracking_text.h"

#include "ardour_ui.h"
#include "audio_clock.h"
#include "editor.h"
#include "editor_drag.h"
#include "global_signals.h"
#include "main_clock.h"
#include "verbose_cursor.h"

#include "i18n.h"

using namespace std;
using namespace ARDOUR;

VerboseCursor::VerboseCursor (Editor* editor)
        : _editor (editor)
{
        _canvas_item = new ArdourCanvas::TrackingText (_editor->get_noscroll_group());
        CANVAS_DEBUG_NAME (_canvas_item, "verbose canvas cursor");
        _canvas_item->set_font_description (Pango::FontDescription (ARDOUR_UI::config()->get_LargerBoldFont()));
        color_handler ();

        ARDOUR_UI_UTILS::ColorsChanged.connect (sigc::mem_fun (*this, &VerboseCursor::color_handler));
}

void
VerboseCursor::color_handler ()
{
        _canvas_item->set_color (ARDOUR_UI::config()->color_mod ("verbose canvas cursor", "verbose canvas cursor"));
}

ArdourCanvas::Item *
VerboseCursor::canvas_item () const
{
        return _canvas_item;
}

void
VerboseCursor::set (string const & text)
{
        _canvas_item->set (text);
}

void
VerboseCursor::show ()
{
        _canvas_item->show_and_track (true, true);
        _canvas_item->parent()->raise_to_top ();
}

void
VerboseCursor::hide ()
{
        _canvas_item->hide ();
        _canvas_item->parent()->lower_to_bottom ();
        /* reset back to a sensible default for the next time we display the VC */
        _canvas_item->set_offset (ArdourCanvas::Duple (10, 10));
}

void
VerboseCursor::set_offset (ArdourCanvas::Duple const & d)
{
        _canvas_item->set_offset (d);
}

void
VerboseCursor::set_time (framepos_t frame)
{
        char buf[128];
        Timecode::Time timecode;
        Timecode::BBT_Time bbt;

        if (_editor->_session == 0) {
                return;
        }

        /* Take clock mode from the primary clock */

        AudioClock::Mode m = ARDOUR_UI::instance()->primary_clock->mode();

        switch (m) {
        case AudioClock::BBT:
                _editor->_session->bbt_time (frame, bbt);
                snprintf (buf, sizeof (buf), "%02" PRIu32 "|%02" PRIu32 "|%02" PRIu32, bbt.bars, bbt.beats, bbt.ticks);
                break;

        case AudioClock::Timecode:
                _editor->_session->timecode_time (frame, timecode);
                snprintf (buf, sizeof (buf), "%s", Timecode::timecode_format_time (timecode).c_str());
                break;

        case AudioClock::MinSec:
                AudioClock::print_minsec (frame, buf, sizeof (buf), _editor->_session->frame_rate());
                break;

        default:
                snprintf (buf, sizeof(buf), "%" PRIi64, frame);
                break;
        }

        _canvas_item->set (buf);
}

void
VerboseCursor::set_duration (framepos_t start, framepos_t end)
{
        char buf[128];
        Timecode::Time timecode;
        Timecode::BBT_Time sbbt;
        Timecode::BBT_Time ebbt;
        Meter meter_at_start (_editor->_session->tempo_map().meter_at(start));

        if (_editor->_session == 0) {
                return;
        }

        AudioClock::Mode m = ARDOUR_UI::instance()->primary_clock->mode ();

        switch (m) {
        case AudioClock::BBT:
        {
                _editor->_session->bbt_time (start, sbbt);
                _editor->_session->bbt_time (end, ebbt);

                /* subtract */
                /* XXX this computation won't work well if the
                user makes a selection that spans any meter changes.
                */

                /* use signed integers for the working values so that
                   we can underflow.
                */

                int ticks = ebbt.ticks;
                int beats = ebbt.beats;
                int bars = ebbt.bars;

                ticks -= sbbt.ticks;
                if (ticks < 0) {
                        ticks += int (Timecode::BBT_Time::ticks_per_beat);
                        --beats;
                }

                beats -= sbbt.beats;
                if (beats < 0) {
                        beats += int (meter_at_start.divisions_per_bar());
                        --bars;
                }

                bars -= sbbt.bars;

                snprintf (buf, sizeof (buf), "%02" PRIu32 "|%02" PRIu32 "|%02" PRIu32, bars, beats, ticks);
                break;
        }

        case AudioClock::Timecode:
                _editor->_session->timecode_duration (end - start, timecode);
                snprintf (buf, sizeof (buf), "%s", Timecode::timecode_format_time (timecode).c_str());
                break;

        case AudioClock::MinSec:
                AudioClock::print_minsec (end - start, buf, sizeof (buf), _editor->_session->frame_rate());
                break;

        default:
                snprintf (buf, sizeof(buf), "%" PRIi64, end - start);
                break;
        }

        _canvas_item->set (buf);
}

bool
VerboseCursor::visible () const
{
        return _canvas_item->visible();
}