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/*
* 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 "ardour/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"
PBD::Signal1<void,TempoCurve*> TempoCurve::CatchDeletion;
static double curve_height = 13.0;
void TempoCurve::setup_sizes(const double timebar_height)
{
curve_height = floor (timebar_height) - 2.5;
}
/* ignores Tempo note type - only note_types_per_minute is potentially curved */
TempoCurve::TempoCurve (PublicEditor& ed, ArdourCanvas::Container& parent, guint32 rgba, ARDOUR::TempoSection& temp, samplepos_t sample, bool handle_events)
: editor (ed)
, _parent (&parent)
, _curve (0)
, _shown (false)
, _color (rgba)
, _min_tempo (temp.note_types_per_minute())
, _max_tempo (temp.note_types_per_minute())
, _tempo (temp)
, _start_text (0)
, _end_text (0)
{
sample_position = sample;
unit_position = editor.sample_to_pixel (sample);
group = new ArdourCanvas::Container (&parent, ArdourCanvas::Duple (unit_position, 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);
points = new ArdourCanvas::Points ();
_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/%.0f", _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;
}
void TempoCurve::reparent(ArdourCanvas::Container & parent)
{
group->reparent (&parent);
_parent = &parent;
}
void
TempoCurve::canvas_height_set (double h)
{
_canvas_height = h;
}
ArdourCanvas::Item&
TempoCurve::the_item() const
{
return *group;
}
void
TempoCurve::set_position (samplepos_t sample, samplepos_t end_sample)
{
unit_position = editor.sample_to_pixel (sample);
group->set_x_position (unit_position);
sample_position = sample;
_end_sample = end_sample;
points->clear();
points = new ArdourCanvas::Points ();
points->push_back (ArdourCanvas::Duple (0.0, curve_height));
if (sample >= end_sample) {
/* shouldn't happen but ..*/
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 (1.0, y_pos));
} else if (_tempo.type() == ARDOUR::TempoSection::Constant || _tempo.c() == 0.0) {
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 (editor.sample_to_pixel (end_sample - sample), y_pos));
} else {
const samplepos_t sample_step = max ((end_sample - sample) / 5, (samplepos_t) 1);
samplepos_t current_sample = sample;
while (current_sample < end_sample) {
const double tempo_at = _tempo.tempo_at_minute (_tempo.minute_at_sample (current_sample)).note_types_per_minute();
const double y_pos = 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 - sample), min (y_pos, curve_height)));
current_sample += sample_step;
}
const double tempo_at = _tempo.tempo_at_minute (_tempo.minute_at_sample (end_sample)).note_types_per_minute();
const double y_pos = 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_sample - sample), min (y_pos, curve_height)));
}
_curve->set (*points);
char buf[10];
snprintf (buf, sizeof (buf), "%.3f/%.0f", _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);
_start_text->set_position (ArdourCanvas::Duple (10, .5 ));
_end_text->set_position (ArdourCanvas::Duple (editor.sample_to_pixel (end_sample - sample) - _end_text->text_width() - 10, .5 ));
if (_end_text->text_width() + _start_text->text_width() + 20 > editor.sample_to_pixel (end_sample - sample)) {
_start_text->hide();
_end_text->hide();
} else {
_start_text->show();
_end_text->show();
}
}
void
TempoCurve::reposition ()
{
set_position (sample_position, _end_sample);
}
void
TempoCurve::show ()
{
_shown = true;
group->show ();
}
void
TempoCurve::hide ()
{
_shown = false;
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);
}
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