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ardour/gtk2_ardour/marker.cc

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/*
* Copyright (C) 2005-2017 Paul Davis <paul@linuxaudiosystems.com>
* Copyright (C) 2005 Taybin Rutkin <taybin@taybin.com>
* Copyright (C) 2007-2011 David Robillard <d@drobilla.net>
* Copyright (C) 2007 Doug McLain <doug@nostar.net>
* Copyright (C) 2008-2012 Carl Hetherington <carl@carlh.net>
* Copyright (C) 2014-2017 Robin Gareus <robin@gareus.org>
* Copyright (C) 2015 Tim Mayberry <mojofunk@gmail.com>
* Copyright (C) 2016-2017 Nick Mainsbridge <mainsbridge@gmail.com>
* Copyright (C) 2018 Ben Loftis <ben@harrisonconsoles.com>
*
* 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.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include <sstream>
#include <sigc++/bind.h>
#include "ardour/tempo.h"
#include "canvas/rectangle.h"
#include "canvas/container.h"
#include "canvas/line.h"
#include "canvas/polygon.h"
#include "canvas/text.h"
#include "canvas/canvas.h"
#include "canvas/scroll_group.h"
#include "canvas/debug.h"
#include "ui_config.h"
/*
* ardour_ui.h include was moved to the top of the list
* due to a conflicting definition of 'Rect' between
* Apple's MacTypes.h and GTK.
*
* Now that we are including ui_config.h and not ardour_ui.h
* the above comment may no longer apply and this comment
* can be removed and ui_config.h inclusion moved.
*/
#include "marker.h"
#include "public_editor.h"
#include "utils.h"
#include "rgb_macros.h"
#include "tempo_curve.h"
#include <gtkmm2ext/utils.h>
#include "pbd/i18n.h"
using namespace std;
using namespace ARDOUR;
using namespace ARDOUR_UI_UTILS;
using namespace Gtkmm2ext;
PBD::Signal1<void,ArdourMarker*> ArdourMarker::CatchDeletion;
static double marker_height = 13.0;
void ArdourMarker::setup_sizes(const double timebar_height)
{
marker_height = floor (timebar_height) - 2;
}
uint32_t
ArdourMarker::color (std::string const& color_name)
{
const Gtkmm2ext::SVAModifier alpha = UIConfiguration::instance().modifier (color_name);
return Gtkmm2ext::HSV (UIConfiguration::instance().color (color_name)).mod (alpha).color();
}
ArdourMarker::ArdourMarker (PublicEditor& ed, ArdourCanvas::Item& parent, std::string const& color_name, string const& annotation,
Type type, timepos_t const & pos, bool handle_events, RegionView* rv, bool use_tooltip)
: editor (ed)
, _parent (&parent)
, _track_canvas_line (0)
, _type (type)
, _selected (false)
, _entered (false)
, _shown (false)
, _line_shown (false)
, _use_tooltip (use_tooltip)
, _color (color_name)
, _points_color (color_name)
, _left_label_limit (DBL_MAX)
, _right_label_limit (DBL_MAX)
, _label_offset (0)
, _line_height (-1)
, _region_view (rv)
, _cue_index (-1)
{
const double scale = UIConfiguration::instance ().get_ui_scale ();
const double MH = marker_height - .5;
const double M3 = std::max(1.f, rintf(3.f * scale));
const double M6 = std::max(2.f, rintf(6.f * scale));
const double M5 = std::max(1.f, rintf(5.f * scale));
const double M10 = std::max(2.f, rintf(10.f * scale));
/* Shapes we use:
*
* Mark:
* RegionCue:
* BBTPosition
*
* (0,0) -> (6,0)
* ^ |
* | V
* (0,MH*.4) (6,MH*.4)
* \ /
* (3,MH)
*
*
* TempoMark:
* MeterMark:
*
* (3,0)
* / \
* (0,MH*.6) (6,MH.*.6)
* ^ |
* | V
* (0,MH) <- (6,MH)
*
*
* PunchIn:
* LoopStart:
* SessionStart:
* RangeStart:
*
* 0,0\
* | \
* | \ 6,MH/2
* | /
* | /
* 0,MH
*
*
* PunchOut:
* LoopEnd:
* SessionEnd:
* RangeEnd:
*
* /12,0
* / |
* 6,MH/2/ |
* \ |
* \ |
* \12,MH
*
*
* SelectionStart:
*
* 0,0 ------> MH,0
* | /
* | /
* | /
* | /
* | /
* | /
* 0,MH
*
*
* SelectionEnd:
*
* -MH,0 ------> 0,0
* \ |
* \ |
* \ |
* \ |
* \ |
* \ |
* \ |
* 0,MH
*
* Cue:
* ben: put your shape here :)
*/
switch (_type) {
case Mark: /* fallthrough */
case RegionCue: /* fallthrough */
case BBTPosition:
points = new ArdourCanvas::Points ();
points->push_back (ArdourCanvas::Duple (0.0, 0.0));
points->push_back (ArdourCanvas::Duple ( M6, 0.0));
points->push_back (ArdourCanvas::Duple ( M6, MH * .4));
points->push_back (ArdourCanvas::Duple ( M3, MH));
points->push_back (ArdourCanvas::Duple (0.0, MH * .4));
points->push_back (ArdourCanvas::Duple (0.0, 0.0));
_shift = 3 * scale;
_label_offset = 8.0 * scale;
break;
case Tempo: /* fallthrough */
case Meter:
points = new ArdourCanvas::Points ();
points->push_back (ArdourCanvas::Duple ( M5, 0.0));
points->push_back (ArdourCanvas::Duple ( M10, MH * .6));
points->push_back (ArdourCanvas::Duple ( M10, MH));
points->push_back (ArdourCanvas::Duple (0.0, MH));
points->push_back (ArdourCanvas::Duple (0.0, MH * .6));
points->push_back (ArdourCanvas::Duple ( M5, 0.0));
_shift = 5 * scale;
_label_offset = 12.0 * scale;
break;
case PunchIn: /* fallthrough */
case LoopStart: /* fallthrough */
case SessionStart: /* fallthrough */
case RangeStart:
points = new ArdourCanvas::Points ();
points->push_back (ArdourCanvas::Duple ( 0.0, 0.0));
points->push_back (ArdourCanvas::Duple (M6 + .5, MH * .5));
points->push_back (ArdourCanvas::Duple ( 0.0, MH));
points->push_back (ArdourCanvas::Duple ( 0.0, 0.0));
_shift = 0 * scale;
_label_offset = 8.0 * scale;
break;
case PunchOut: /* fallthrough */
case LoopEnd: /* fallthrough */
case SessionEnd: /* fallthrough */
case RangeEnd:
points = new ArdourCanvas::Points (); // leaks
points->push_back (ArdourCanvas::Duple ( M6, 0.0));
points->push_back (ArdourCanvas::Duple ( M6, MH));
points->push_back (ArdourCanvas::Duple (0.0, MH * .5));
points->push_back (ArdourCanvas::Duple ( M6, 0.0));
_shift = M6;
_label_offset = 0.0 * scale;
break;
case SelectionStart:
points = new ArdourCanvas::Points ();
points->push_back (ArdourCanvas::Duple ( 0.0, 0.0));
points->push_back (ArdourCanvas::Duple (.75 * MH, 0.0));
points->push_back (ArdourCanvas::Duple ( 0.0, .75 * MH));
points->push_back (ArdourCanvas::Duple ( 0.0, 0.0));
_shift = 0;
_label_offset = 0;
break;
case SelectionEnd:
points = new ArdourCanvas::Points ();
points->push_back (ArdourCanvas::Duple (-.75 * MH, 0.0));
points->push_back (ArdourCanvas::Duple ( 0.0, 0.0));
points->push_back (ArdourCanvas::Duple ( 0.0, .75 * MH));
points->push_back (ArdourCanvas::Duple (-.75 * MH, 0.0));
_shift = 0;
_label_offset = 0;
break;
case Cue:
// XXX TODO scope offs
float offs = 1.0 * scale;
points = new ArdourCanvas::Points ();
points->push_back (ArdourCanvas::Duple (offs, offs));
points->push_back (ArdourCanvas::Duple (MH-offs*2, offs));
points->push_back (ArdourCanvas::Duple (MH-offs*2, MH-offs*2));
points->push_back (ArdourCanvas::Duple (offs, MH-offs*2));
points->push_back (ArdourCanvas::Duple (offs, offs));
_shift = MH/2;
_label_offset = 2.0 * scale;
break;
}
_position = pos;
unit_position = editor.sample_to_pixel (pos.samples());
unit_position -= _shift;
group = new ArdourCanvas::Container (&parent, ArdourCanvas::Duple (unit_position, 1));
#ifdef CANVAS_DEBUG
group->name = string_compose ("Marker::group for %1", annotation);
#endif
switch (_type) {
case RegionCue:
/* fallthrough */
case Meter:
/* fallthrough */
case Tempo:
/* fallthrough */
case SelectionStart:
/* fallthrough */
case SelectionEnd:
_name_flag = 0;
break;
default:
_name_flag = new ArdourCanvas::Rectangle (group);
#ifdef CANVAS_DEBUG
_name_flag->name = string_compose ("Marker::_name_flag for %1", annotation);
#endif
break;
}
/* adjust to properly locate the tip */
_pcue = new ArdourCanvas::Circle (group);
_pmark = new ArdourCanvas::Polygon (group);
CANVAS_DEBUG_NAME (_pmark, string_compose ("Marker::mark for %1", annotation));
_pmark->set (*points);
switch (_type) {
case SelectionStart:
/* fallthrough */
case SelectionEnd:
_pcue->hide();
_pmark->show();
break;
case Cue:
_pcue->set_outline(false);
_pcue->set_fill(true);
_pcue->set_center ( ArdourCanvas::Duple (MH/2, MH/2) );
_pcue->set_radius ( MH/2 );
_pcue->show();
_pmark->hide();
if (_name_flag) {
_name_flag->hide();
}
break;
default:
_pcue->hide();
_pmark->show();
break;
}
/* setup name pixbuf sizes */
name_font = get_font_for_style (N_("MarkerText"));
Gtk::Label foo;
Glib::RefPtr<Pango::Layout> layout = foo.create_pango_layout (X_("Hg")); /* ascender + descender */
int width;
layout->set_font_description (name_font);
Gtkmm2ext::get_ink_pixel_size_with_descent (layout, width, name_height, name_descent);
_name_item = new ArdourCanvas::Text (group);
CANVAS_DEBUG_NAME (_name_item, string_compose ("ArdourMarker::_name_item for %1", annotation));
_name_item->set_font_description (name_font);
_name_item->set_color (RGBA_TO_UINT (0,0,0,255));
_name_item->set_position (ArdourCanvas::Duple (_label_offset, floor (.5 * (name_height - name_descent - .5))));
apply_color ();
set_name (annotation.c_str());
editor.ZoomChanged.connect (sigc::mem_fun (*this, &ArdourMarker::reposition));
/* events will be handled by both the group and the mark itself, so
* make sure they can both be used to lookup this object.
*/
group->set_data ("marker", this);
_pmark->set_data ("marker", this);
_pcue->set_data ("marker", this);
if (handle_events) {
group->Event.connect (sigc::bind (sigc::mem_fun (editor, &PublicEditor::canvas_marker_event), group, this));
}
UIConfiguration::instance().ColorsChanged.connect (sigc::mem_fun (*this, &ArdourMarker::color_handler));
}
ArdourMarker::~ArdourMarker ()
{
CatchDeletion (this); /* EMIT SIGNAL */
/* not a member of a group that we own, so we must delete it explicitly */
delete _track_canvas_line;
/* destroying the parent group destroys its contents, namely any polygons etc. that we added */
delete group;
delete points;
}
void ArdourMarker::reparent(ArdourCanvas::Item & parent)
{
group->reparent (&parent);
_parent = &parent;
}
void
ArdourMarker::set_selected (bool s)
{
if (_selected == s) {
return;
}
_selected = s;
setup_line ();
apply_color ();
}
void
ArdourMarker::set_entered (bool yn)
{
/* if the pointer moves from the polygon to the line, we will get 2
enter events in a row, which confuses color management. Catch this.
*/
if (yn == _entered) {
return;
}
_entered = yn;
apply_color ();
}
void
ArdourMarker::set_show_line (bool s)
{
_line_shown = s;
setup_line ();
}
void
ArdourMarker::setup_line ()
{
if (_shown && (_selected || _line_shown)) {
ArdourCanvas::Item* line_parent;
if (_type == RegionCue) {
line_parent = group;
} else {
line_parent = editor.get_cursor_scroll_group();
}
if (_track_canvas_line == 0) {
_track_canvas_line = new ArdourCanvas::Line (line_parent);
_track_canvas_line->Event.connect (sigc::bind (sigc::mem_fun (editor, &PublicEditor::canvas_marker_event), group, this));
}
/* discover where our group origin is in canvas coordinates */
ArdourCanvas::Duple g = group->canvas_origin();
ArdourCanvas::Duple d;
if (_type == RegionCue) {
/* line top is at the top of the region view/track (g.y in canvas coords */
d = line_parent->canvas_to_item (ArdourCanvas::Duple (g.x + _shift, g.y));
} else {
/* line top is at the top of the canvas (0 in canvas coords) */
d = line_parent->canvas_to_item (ArdourCanvas::Duple (g.x + _shift, 0));
}
_track_canvas_line->set_x0 (d.x);
_track_canvas_line->set_x1 (d.x);
_track_canvas_line->set_y0 (d.y);
_track_canvas_line->set_y1 (_line_height > 0 ? d.y + _line_height : ArdourCanvas::COORD_MAX);
_track_canvas_line->set_outline_color (UIConfiguration::instance().color (_selected ? "entered marker" : _color));
_track_canvas_line->raise_to_top ();
_track_canvas_line->show ();
} else {
if (_track_canvas_line) {
_track_canvas_line->hide ();
}
}
}
ArdourCanvas::Item&
ArdourMarker::the_item() const
{
return *group;
}
void
ArdourMarker::set_line_height (double h)
{
_line_height = h;
setup_line ();
}
void
ArdourMarker::set_name (const string& new_name, const string& tooltip)
{
_name = new_name;
if (_use_tooltip) {
_pcue->set_tooltip (new_name);
_pmark->set_tooltip (new_name);
if (_name_flag) {
_name_flag->set_tooltip (new_name);
}
if (tooltip.empty()) {
_name_item->set_tooltip (new_name);
} else {
_name_item->set_tooltip (tooltip);
}
}
setup_name_display ();
}
/** @return true if our label is on the left of the mark, otherwise false */
bool
ArdourMarker::label_on_left () const
{
return (_type == SessionEnd || _type == RangeEnd || _type == LoopEnd || _type == PunchOut);
}
void
ArdourMarker::setup_name_display ()
{
double limit = DBL_MAX;
if (label_on_left ()) {
limit = _left_label_limit;
} else {
limit = _right_label_limit;
}
double scale = UIConfiguration::instance().get_ui_scale();
const double padding = std::max (2., rint (2. * scale));
const double M3 = std::max(1., rint (3. * scale));
/* Work out how wide the name can be */
int name_width;
int name_height;
pixel_size (_name, name_font, name_width, name_height);
name_width = min ((double) name_width + padding, limit);
if (name_width == 0) {
_name_item->hide ();
} else {
_name_item->show ();
if (label_on_left ()) {
_name_item->set_x_position (-name_width);
}
_name_item->clamp_width (name_width);
if (_type == Cue) {
if (_cue_index != CueRecord::stop_all) {
_name_item->set (cue_marker_name (_cue_index));
int tw = _name_item->text_width();
int th = _name_item->text_height();
_name_item->set_position (ArdourCanvas::Duple (_pcue->width()/2 - tw/2 - 1*scale, _pcue->height()/2 - th/2 - 1*scale ));
_pcue->show(); //show the circle
_pmark->hide();
} else {
_name_item->set ("");
_pcue->hide(); //show a square
_pmark->show();
}
} else {
_name_item->set (_name);
}
if (_name_flag) {
if (label_on_left ()) {
/* adjust right edge of background to fit text */
_name_flag->set_x0 (_name_item->position().x - padding);
_name_flag->set_x1 (_name_item->position().x + name_width + _shift);
} else {
/* right edge remains at zero (group-relative). Add
* arbitrary 2 pixels of extra padding at the end
*/
switch (_type) {
case Tempo:
_name_item->hide ();
// tip's x-pos is at "M3", box is 2x marker's
_name_flag->set_x0 (-M3);
_name_flag->set_x1 (3 * M3);
break;
case Mark:
case Meter:
_name_flag->set_x0 (M3);
_name_flag->set_x1 (_name_item->position().x + name_width + padding);
break;
case Cue:
_name_flag->set_x0 (M3);
_name_flag->set_x1 (_name_item->position().x + name_width + padding + 1*scale);
break;
default:
_name_flag->set_x0 (0);
_name_flag->set_x1 (_name_item->position().x + name_width + padding);
break;
}
}
}
}
if (_name_flag) {
_name_flag->set_y0 (0);
_name_flag->set_y1 (marker_height - padding);
}
}
void
ArdourMarker::set_position (timepos_t const & pos)
{
unit_position = editor.sample_to_pixel (pos.samples()) - _shift;
group->set_x_position (unit_position);
setup_line ();
_position = pos;
}
void
ArdourMarker::reposition ()
{
set_position (_position);
}
void
ArdourMarker::show ()
{
_shown = true;
group->show ();
setup_line ();
}
void
ArdourMarker::hide ()
{
_shown = false;
group->hide ();
setup_line ();
}
void
ArdourMarker::set_points_color (std::string const& color_name)
{
_points_color = color_name;
uint32_t c = UIConfiguration::instance().color (_points_color);
_pcue->set_fill_color (c);
_pmark->set_fill_color (c);
_pmark->set_outline_color (c);
}
void
ArdourMarker::set_color (std::string const& color_name)
{
if (_color == color_name) {
return;
}
_color = color_name;
apply_color ();
}
void
ArdourMarker::apply_color ()
{
uint32_t c = color (_entered ? "entered marker" : _color);
uint32_t cs = color (_selected || _entered ? "entered marker" : _color);
_pcue->set_fill_color (cs);
_pmark->set_fill_color (cs);
_pmark->set_outline_color (cs);
if (_track_canvas_line) {
_track_canvas_line->set_outline_color (cs);
}
if (_name_item) {
if (_name_flag) {
/* make sure text stands out over bg color */
_name_item->set_color (contrasting_text_color (c));
} else {
_name_item->set_color (RGBA_TO_UINT (255,255,255,255)); //white: matched to TempoCurve text
}
}
if (_name_flag) {
_name_flag->set_fill (true);
_name_flag->set_fill_color (c);
_name_flag->set_outline (false);
}
}
void
ArdourMarker::color_handler ()
{
apply_color ();
set_points_color (_points_color);
}
/** Set the number of pixels that are available for a label to the left of the centre of this marker */
void
ArdourMarker::set_left_label_limit (double p)
{
/* Account for the size of the marker */
_left_label_limit = p - marker_height;
if (_left_label_limit < 0) {
_left_label_limit = 0;
}
if (label_on_left ()) {
setup_name_display ();
}
}
/** Set the number of pixels that are available for a label to the right of the centre of this marker */
void
ArdourMarker::set_right_label_limit (double p)
{
/* Account for the size of the marker */
_right_label_limit = p - marker_height;
if (_right_label_limit < 0) {
_right_label_limit = 0;
}
if (!label_on_left ()) {
setup_name_display ();
}
}
MetricMarker::MetricMarker (PublicEditor& ed, ArdourCanvas::Item& parent, std::string const& color_name, const string& annotation,
Type type, timepos_t const & pos, bool handle_events)
: ArdourMarker (ed, parent, color_name, annotation, type, pos, false, nullptr, false)
{
}
/***********************************************************************/
SelectionMarker::SelectionMarker (PublicEditor& editor, ArdourCanvas::Item& parent, std::string const& color_name, Type type)
: ArdourMarker (editor, parent, color_name, "", type, timepos_t(0), false)
{
assert (type == SelectionStart || type == SelectionEnd);
#ifdef CANVAS_DEBUG
group->name = string_compose ("Marker::group for %1", type == SelectionStart ? "SelectionStart" : "SelectionEnd");
#endif
group->Event.connect (sigc::bind (sigc::mem_fun (editor, &PublicEditor::canvas_selection_marker_event), group));
}
/***********************************************************************/
TempoMarker::TempoMarker (PublicEditor& editor, ArdourCanvas::Item& parent, ArdourCanvas::Item& text_parent, std::string const& color_name, const string& text, Temporal::TempoPoint const & temp, samplepos_t sample, uint32_t curve_color)
: MetricMarker (editor, parent, color_name, text, Tempo, temp.time(), false)
, _tempo (&temp)
, _mapping_text (new ArdourCanvas::Text (&text_parent))
{
group->Event.connect (sigc::bind (sigc::mem_fun (editor, &PublicEditor::canvas_tempo_marker_event), group, this));
/* points[1].x gives the width of the marker */
_curve = new TempoCurve (editor, *group, curve_color, temp, true, (*points)[1].x);
_curve->the_item().lower_to_bottom ();
_mapping_text->set_color (0xffffff);
_mapping_text->set_font_description (ARDOUR_UI_UTILS::get_font_for_style (N_("MarkerText")));
_mapping_text->set_position (ArdourCanvas::Duple (unit_position, 0.0));
_mapping_text->set_ignore_events (true);
char buf[64];
snprintf (buf, sizeof (buf), "%.2f", _tempo->note_types_per_minute ());
_mapping_text->set (buf);
}
TempoMarker::~TempoMarker ()
{
/* the mapping text is a little unusual in that we do not leave its
parent (the editor's mapping_group) to manage its lifetime. We must
explicitly remove and delete it.
*/
_mapping_text->parent()->remove (_mapping_text);
delete _mapping_text;
delete _curve;
}
void
TempoMarker::reposition ()
{
MetricMarker::reposition ();
_mapping_text->set_position (ArdourCanvas::Duple (std::max (3., unit_position), _mapping_text->position().y));
}
void
TempoMarker::update ()
{
set_position (_tempo->time());
_mapping_text->set_position (ArdourCanvas::Duple (std::max (3., unit_position), _mapping_text->position().y));
char buf[64];
snprintf (buf, sizeof (buf), "%.2f", _tempo->note_types_per_minute ());
_mapping_text->set (buf);
}
TempoCurve&
TempoMarker::curve()
{
return *_curve;
}
void
TempoMarker::reset_tempo (Temporal::TempoPoint const & t)
{
_tempo = &t;
}
Temporal::Point const &
TempoMarker::point() const
{
return *_tempo;
}
/***********************************************************************/
MeterMarker::MeterMarker (PublicEditor& editor, ArdourCanvas::Item& parent, std::string const& color_name, const string& text, Temporal::MeterPoint const & m)
: MetricMarker (editor, parent, color_name, text, Meter, m.time(), false)
, _meter (&m)
{
group->Event.connect (sigc::bind (sigc::mem_fun (editor, &PublicEditor::canvas_meter_marker_event), group, this));
}
MeterMarker::~MeterMarker ()
{
}
void
MeterMarker::update ()
{
set_position (_meter->time());
}
void
MeterMarker::reset_meter (Temporal::MeterPoint const & m)
{
_meter = &m;
}
Temporal::Point const &
MeterMarker::point() const
{
return *_meter;
}
/***********************************************************************/
BBTMarker::BBTMarker (PublicEditor& editor, ArdourCanvas::Item& parent, std::string const& color_name, Temporal::MusicTimePoint const & p)
: MetricMarker (editor, parent, color_name, p.name(), BBTPosition, p.time(), false)
, _point (&p)
{
set_name (name(), string());
group->Event.connect (sigc::bind (sigc::mem_fun (editor, &PublicEditor::canvas_bbt_marker_event), group, this));
tempo_marker = editor.find_marker_for_tempo (p);
meter_marker = editor.find_marker_for_meter (p);
}
BBTMarker::~BBTMarker ()
{
}
void
BBTMarker::update ()
{
set_position (_point->time());
tempo_marker->update ();
meter_marker->update ();
}
void
BBTMarker::reset_point (Temporal::MusicTimePoint const & p)
{
_point = &p;
}
Temporal::Point const &
BBTMarker::point() const
{
return *_point;
}
void
BBTMarker::set_position (Temporal::timepos_t const & pos)
{
ArdourMarker::set_position (pos);
tempo_marker->set_position (pos);
meter_marker->set_position (pos);
}
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