tempo_curve.h

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/*
 * Copyright (C) 2016-2017 Nick Mainsbridge <mainsbridge@gmail.com>
 * Copyright (C) 2017-2019 Robin Gareus <robin@gareus.org>
 *
 * 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.
 */
 
#pragma once
 
#include <string>
#include <glib.h>
 
#include <sigc++/signal.h>
 
#include "ardour/ardour.h"
#include "pbd/signals.h"
 
#include "canvas/container.h"
#include "canvas/types.h"
#include "canvas/framed_curve.h"
#include "canvas/text.h"
 
namespace Temporal {
        class TempoPoint;
}
class PublicEditor;
 
class TempoCurve : public sigc::trackable
{
public:
        TempoCurve (PublicEditor& editor, ArdourCanvas::Item &, guint32 rgba, Temporal::TempoPoint const & temp, bool handle_events , ArdourCanvas::Distance marker_width);
        ~TempoCurve ();
 
        static PBD::Signal<void(TempoCurve*)> CatchDeletion;
 
        static void setup_sizes (const double timebar_height);
 
        ArdourCanvas::Item& the_item() const;
 
        void set_duration (ARDOUR::samplecnt_t duration);
        void set_color_rgba (uint32_t rgba);
 
        void hide ();
        void show ();
 
        Temporal::TempoPoint const & tempo () const { return *_tempo; }
        void reset_point (Temporal::TempoPoint const &);
 
        void update_range (double min, double max) { _max_tempo = max; _min_tempo = min; }
 
        static void format_tempo (double ntpm, int nt, char*, size_t);
 
protected:
        PublicEditor& editor;
 
        ArdourCanvas::Item*        _parent;
        ArdourCanvas::Container*    group;
        ArdourCanvas::Points        points;
        ArdourCanvas::FramedCurve* _curve;
 
        ARDOUR::samplecnt_t    _duration;
        ArdourCanvas::Distance _marker_width;
        uint32_t               _color;
 
        void reposition ();
 
private:
        /* disallow copy construction */
        TempoCurve (TempoCurve const &);
 
        TempoCurve & operator= (TempoCurve const &);
 
        double _min_tempo;
        double _max_tempo;
 
        Temporal::TempoPoint const * _tempo;
        ArdourCanvas::Text*   _start_text;
        ArdourCanvas::Text*   _end_text;
};