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livetrax/gtk2_ardour/tempo_curve.cc

226 lines
6.8 KiB
C++

/*
* Copyright (C) 2016-2017 Nick Mainsbridge <mainsbridge@gmail.com>
* Copyright (C) 2016-2017 Paul Davis <paul@linuxaudiosystems.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 <sigc++/bind.h>
#include "temporal/tempo.h"
#include "canvas/rectangle.h"
#include "canvas/container.h"
#include "canvas/curve.h"
#include "canvas/canvas.h"
#include "canvas/debug.h"
#include "ui_config.h"
#include "tempo_curve.h"
#include "public_editor.h"
#include "utils.h"
#include "rgb_macros.h"
#include <gtkmm2ext/utils.h>
#include "pbd/i18n.h"
using namespace Temporal;
PBD::Signal1<void,TempoCurve*> TempoCurve::CatchDeletion;
static double curve_height = 13.0;
void
TempoCurve::setup_sizes(const double timebar_height)
{
const double ui_scale = UIConfiguration::instance ().get_ui_scale ();
curve_height = floor (timebar_height) - (2.5 * ui_scale);
}
/* ignores Tempo note type - only note_types_per_minute is potentially curved */
TempoCurve::TempoCurve (PublicEditor& ed, ArdourCanvas::Item& parent, guint32 rgba, TempoPoint const & temp, bool handle_events, ArdourCanvas::Distance marker_width)
: editor (ed)
, _parent (&parent)
, _curve (0)
, _duration (UINT32_MAX)
, _marker_width (marker_width)
, _color (rgba)
, _min_tempo (temp.note_types_per_minute())
, _max_tempo (temp.note_types_per_minute())
, _tempo (&temp)
, _start_text (0)
, _end_text (0)
{
/* XXX x arg for Duple should probably be marker width, passed in from owner */
group = new ArdourCanvas::Container (&parent, ArdourCanvas::Duple (marker_width, 1));
#ifdef CANVAS_DEBUG
group->name = string_compose ("TempoCurve::group for %1", _tempo->note_types_per_minute());
#endif
_curve = new ArdourCanvas::FramedCurve (group);
#ifdef CANVAS_DEBUG
_curve->name = string_compose ("TempoCurve::curve for %1", _tempo->note_types_per_minute());
#endif
_curve->set_points_per_segment (3);
_curve->set (points);
_start_text = new ArdourCanvas::Text (group);
_end_text = new ArdourCanvas::Text (group);
_start_text->set_font_description (ARDOUR_UI_UTILS::get_font_for_style (N_("MarkerText")));
_end_text->set_font_description (ARDOUR_UI_UTILS::get_font_for_style (N_("MarkerText")));
_start_text->set_color (RGBA_TO_UINT (255,255,255,255));
_end_text->set_color (RGBA_TO_UINT (255,255,255,255));
char buf[10];
snprintf (buf, sizeof (buf), "%.3f/%d", _tempo->note_types_per_minute(), _tempo->note_type());
_start_text->set (buf);
snprintf (buf, sizeof (buf), "%.3f", _tempo->end_note_types_per_minute());
_end_text->set (buf);
set_color_rgba (rgba);
editor.ZoomChanged.connect (sigc::mem_fun (*this, &TempoCurve::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.
*/
_curve->set_data ("tempo curve", this);
if (handle_events) {
//group->Event.connect (sigc::bind (sigc::mem_fun (editor, &PublicEditor::canvas_marker_event), group, this));
}
group->Event.connect (sigc::bind (sigc::mem_fun (editor, &PublicEditor::canvas_tempo_curve_event), _curve, this));
}
TempoCurve::~TempoCurve ()
{
CatchDeletion (this); /* EMIT SIGNAL */
/* destroying the parent group destroys its contents, namely any polygons etc. that we added */
delete group;
}
ArdourCanvas::Item&
TempoCurve::the_item() const
{
return *group;
}
void
TempoCurve::set_duration (samplecnt_t duration)
{
points.clear();
points.push_back (ArdourCanvas::Duple (0.0, curve_height));
ArdourCanvas::Coord duration_pixels = editor.sample_to_pixel (duration);
if (!_tempo->ramped()) {
const double tempo_at = _tempo->note_types_per_minute();
const double y_pos = (curve_height) - (((tempo_at - _min_tempo) / (_max_tempo - _min_tempo)) * curve_height);
points.push_back (ArdourCanvas::Duple (0.0, y_pos));
points.push_back (ArdourCanvas::Duple (duration_pixels, y_pos));
} else {
/* we would like at least 5 points for the line, so divide the
duration to give us that. If we're tiny (just a few samples,
unlikely but ...), do the per-sample thing.
*/
const samplepos_t sample_step = std::max ((duration) / 5, (samplepos_t) 1);
const samplepos_t start_sample = superclock_to_samples (_tempo->sclock(), TEMPORAL_SAMPLE_RATE);
const samplepos_t end = start_sample + duration;
samplepos_t current_sample = start_sample;
double tempo_at;
double y_pos;
while (current_sample < end) {
tempo_at = _tempo->note_types_per_minute_at_DOUBLE (timepos_t (current_sample));
y_pos = std::max ((curve_height) - (((tempo_at - _min_tempo) / (_max_tempo - _min_tempo)) * curve_height), 0.0);
points.push_back (ArdourCanvas::Duple (editor.sample_to_pixel (current_sample - start_sample), std::min (y_pos, curve_height)));
current_sample += sample_step;
}
tempo_at = _tempo->note_types_per_minute_at_DOUBLE (timepos_t (end));
y_pos = std::max ((curve_height) - (((tempo_at - _min_tempo) / (_max_tempo - _min_tempo)) * curve_height), 0.0);
points.push_back (ArdourCanvas::Duple (editor.sample_to_pixel (end), std::min (y_pos, curve_height)));
}
_curve->set (points);
char buf[10];
snprintf (buf, sizeof (buf), "%.3f/%d", _tempo->note_types_per_minute(), _tempo->note_type());
_start_text->set (buf);
snprintf (buf, sizeof (buf), "%.3f", _tempo->end_note_types_per_minute());
_end_text->set (buf);
const double ui_scale = UIConfiguration::instance ().get_ui_scale ();
_start_text->set_position (ArdourCanvas::Duple (_marker_width + (10 * ui_scale), (.5 * ui_scale)));
_end_text->set_position (ArdourCanvas::Duple (duration_pixels - _end_text->text_width() - _marker_width - (10. * ui_scale), (.5 * ui_scale)));
if (_end_text->text_width() + _start_text->text_width() + (20.0 * ui_scale) > duration_pixels) {
_start_text->hide();
_end_text->hide();
} else {
_start_text->show();
_end_text->show();
}
_duration = duration;
}
void
TempoCurve::reposition ()
{
set_duration (_duration);
}
void
TempoCurve::show ()
{
group->show ();
}
void
TempoCurve::hide ()
{
group->hide ();
}
void
TempoCurve::set_color_rgba (uint32_t c)
{
_color = c;
_curve->set_fill_color (UIConfiguration::instance().color_mod (_color, "selection rect"));
_curve->set_outline_color (_color);
}
void
TempoCurve::reset_point (TempoPoint const & tp)
{
_tempo = &tp;
}