227 lines
7.0 KiB
C++
227 lines
7.0 KiB
C++
/*
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* Copyright (C) 2016-2017 Nick Mainsbridge <mainsbridge@gmail.com>
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* Copyright (C) 2016-2017 Paul Davis <paul@linuxaudiosystems.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#include <sigc++/bind.h>
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#include "temporal/tempo.h"
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#include "canvas/rectangle.h"
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#include "canvas/container.h"
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#include "canvas/curve.h"
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#include "canvas/canvas.h"
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#include "canvas/debug.h"
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#include "ui_config.h"
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#include "tempo_curve.h"
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#include "public_editor.h"
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#include "utils.h"
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#include "rgb_macros.h"
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#include <gtkmm2ext/utils.h>
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#include "pbd/i18n.h"
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using namespace Temporal;
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PBD::Signal1<void,TempoCurve*> TempoCurve::CatchDeletion;
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static double curve_height = 13.0;
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void
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TempoCurve::setup_sizes(const double timebar_height)
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{
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const double ui_scale = UIConfiguration::instance ().get_ui_scale ();
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curve_height = floor (timebar_height) - (2.5 * ui_scale);
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}
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/* ignores Tempo note type - only note_types_per_minute is potentially curved */
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TempoCurve::TempoCurve (PublicEditor& ed, ArdourCanvas::Item& parent, guint32 rgba, TempoPoint const & temp, bool handle_events, ArdourCanvas::Distance marker_width)
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: editor (ed)
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, _parent (&parent)
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, _curve (0)
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, _duration (UINT32_MAX)
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, _marker_width (marker_width)
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, _color (rgba)
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, _min_tempo (temp.note_types_per_minute())
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, _max_tempo (temp.note_types_per_minute())
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, _tempo (&temp)
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, _start_text (0)
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, _end_text (0)
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{
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/* XXX x arg for Duple should probably be marker width, passed in from owner */
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group = new ArdourCanvas::Container (&parent, ArdourCanvas::Duple (marker_width + 1, 1));
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#ifdef CANVAS_DEBUG
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group->name = string_compose ("TempoCurve::group for %1", _tempo->note_types_per_minute());
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#endif
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_curve = new ArdourCanvas::FramedCurve (group);
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#ifdef CANVAS_DEBUG
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_curve->name = string_compose ("TempoCurve::curve for %1", _tempo->note_types_per_minute());
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#endif
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_curve->set_points_per_segment (3);
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_curve->set (points);
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_start_text = new ArdourCanvas::Text (group);
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_end_text = new ArdourCanvas::Text (group);
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_start_text->set_font_description (ARDOUR_UI_UTILS::get_font_for_style (N_("MarkerText")));
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_end_text->set_font_description (ARDOUR_UI_UTILS::get_font_for_style (N_("MarkerText")));
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_start_text->set_color (RGBA_TO_UINT (255,255,255,255));
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_end_text->set_color (RGBA_TO_UINT (255,255,255,255));
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char buf[128];
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snprintf (buf, sizeof (buf), "%.1f/%d", _tempo->note_types_per_minute(), _tempo->note_type());
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_start_text->set (buf);
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snprintf (buf, sizeof (buf), "%.1f", _tempo->end_note_types_per_minute());
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_end_text->set (buf);
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set_color_rgba (rgba);
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editor.ZoomChanged.connect (sigc::mem_fun (*this, &TempoCurve::reposition));
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/* events will be handled by both the group and the mark itself, so
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* make sure they can both be used to lookup this object.
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*/
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_curve->set_data (X_("tempo curve"), this);
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if (handle_events) {
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// group->Event.connect (sigc::bind (sigc::mem_fun (editor, &PublicEditor::canvas_marker_event), group, this));
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}
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group->Event.connect (sigc::bind (sigc::mem_fun (editor, &PublicEditor::canvas_tempo_curve_event), _curve, this));
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_curve->Event.connect (sigc::bind (sigc::mem_fun (editor, &PublicEditor::canvas_tempo_curve_event), _curve, this));
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}
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TempoCurve::~TempoCurve ()
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{
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CatchDeletion (this); /* EMIT SIGNAL */
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/* destroying the parent group destroys its contents, namely any polygons etc. that we added */
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delete group;
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}
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ArdourCanvas::Item&
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TempoCurve::the_item() const
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{
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return *group;
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}
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void
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TempoCurve::set_duration (samplecnt_t duration)
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{
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points.clear();
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points.push_back (ArdourCanvas::Duple (0.0, curve_height));
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ArdourCanvas::Coord duration_pixels = editor.sample_to_pixel (duration);
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if (!_tempo->ramped()) {
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const double tempo_at = _tempo->note_types_per_minute();
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const double y_pos = (curve_height) - (((tempo_at - _min_tempo) / (_max_tempo - _min_tempo)) * curve_height);
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points.push_back (ArdourCanvas::Duple (0.0, y_pos));
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points.push_back (ArdourCanvas::Duple (duration_pixels - _marker_width - 1, y_pos));
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} else {
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/* we would like at least 5 points for the line, so divide the
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duration to give us that. If we're tiny (just a few samples,
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unlikely but ...), do the per-sample thing.
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*/
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const samplepos_t sample_step = std::max ((duration) / 5, (samplepos_t) 1);
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const samplepos_t start_sample = superclock_to_samples (_tempo->sclock(), TEMPORAL_SAMPLE_RATE);
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const samplepos_t end = start_sample + duration;
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samplepos_t current_sample = start_sample;
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double tempo_at;
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double y_pos;
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while (current_sample < end) {
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tempo_at = _tempo->note_types_per_minute_at_DOUBLE (timepos_t (current_sample));
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y_pos = std::max ((curve_height) - (((tempo_at - _min_tempo) / (_max_tempo - _min_tempo)) * curve_height), 0.0);
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points.push_back (ArdourCanvas::Duple (editor.sample_to_pixel (current_sample - start_sample), std::min (y_pos, curve_height)));
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current_sample += sample_step;
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}
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tempo_at = _tempo->note_types_per_minute_at_DOUBLE (timepos_t (end));
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y_pos = std::max ((curve_height) - (((tempo_at - _min_tempo) / (_max_tempo - _min_tempo)) * curve_height), 0.0);
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points.push_back (ArdourCanvas::Duple (editor.sample_to_pixel (end) - _marker_width - 1, std::min (y_pos, curve_height)));
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}
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_curve->set (points);
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char buf[129];
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snprintf (buf, sizeof (buf), "%.1f/%d", _tempo->note_types_per_minute(), _tempo->note_type());
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_start_text->set (buf);
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snprintf (buf, sizeof (buf), "%.1f", _tempo->end_note_types_per_minute());
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_end_text->set (buf);
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const double ui_scale = UIConfiguration::instance ().get_ui_scale ();
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_start_text->set_position (ArdourCanvas::Duple (_marker_width + (10 * ui_scale), (.5 * ui_scale)));
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_end_text->set_position (ArdourCanvas::Duple (duration_pixels - _end_text->text_width() - _marker_width - (10. * ui_scale), (.5 * ui_scale)));
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if (_end_text->text_width() + _start_text->text_width() + (20.0 * ui_scale) > duration_pixels) {
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_start_text->hide();
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_end_text->hide();
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} else {
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_start_text->show();
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_end_text->show();
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}
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_duration = duration;
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}
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void
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TempoCurve::reposition ()
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{
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set_duration (_duration);
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}
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void
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TempoCurve::show ()
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{
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group->show ();
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}
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void
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TempoCurve::hide ()
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{
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group->hide ();
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}
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void
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TempoCurve::set_color_rgba (uint32_t c)
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{
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_color = c;
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_curve->set_fill_color (UIConfiguration::instance().color_mod (_color, "selection rect"));
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_curve->set_outline_color (_color);
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}
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void
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TempoCurve::reset_point (TempoPoint const & tp)
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{
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_tempo = &tp;
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}
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