fadeable_object.h

// SPDX-FileCopyrightText: © 2024-2025 Alexandros Theodotou <alex@zrythm.org>
// SPDX-License-Identifier: LicenseRef-ZrythmLicense
 
#pragma once
 
#include "dsp/curve.h"
#include "dsp/position.h"
#include "dsp/tempo_map_qml_adapter.h"
#include "utils/icloneable.h"
 
#include <nlohmann/json_fwd.hpp>
 
namespace zrythm::structure::arrangement
{
class ArrangerObjectFadeRange : public QObject
{
  Q_OBJECT
  Q_PROPERTY (zrythm::dsp::Position * startOffset READ startOffset CONSTANT)
  Q_PROPERTY (zrythm::dsp::Position * endOffset READ endOffset CONSTANT)
  Q_PROPERTY (
    zrythm::dsp::CurveOptionsQmlAdapter * fadeInCurveOpts READ fadeInCurveOpts
      CONSTANT)
  Q_PROPERTY (
    zrythm::dsp::CurveOptionsQmlAdapter * fadeOutCurveOpts READ fadeOutCurveOpts
      CONSTANT)
  QML_ELEMENT
  QML_UNCREATABLE ("")
 
public:
  ArrangerObjectFadeRange (
    const dsp::Position        &start_position,
    const dsp::TempoMapWrapper &tempo_map_wrapper,
    QObject *                   parent = nullptr);
 
  // ========================================================================
  // QML Interface
  // ========================================================================
 
  dsp::Position * startOffset () const { return start_offset_.get (); }
  dsp::Position * endOffset () const { return end_offset_.get (); }
  dsp::CurveOptionsQmlAdapter * fadeInCurveOpts () const
  {
    return fade_in_opts_adapter_.get ();
  }
  dsp::CurveOptionsQmlAdapter * fadeOutCurveOpts () const
  {
    return fade_out_opts_adapter_.get ();
  }
 
  Q_SIGNAL void fadePropertiesChanged ();
 
  // ========================================================================

   * @param fade_in True for in, false for out.
   */
  double get_normalized_y_for_fade (double x, bool fade_in) const
  {
    if (fade_in)
      {
        return fadeInCurveOpts ()->normalizedY (x, false);
      }
 
    return fadeOutCurveOpts ()->normalizedY (x, true);
  }
 
protected:
  friend void init_from (
    ArrangerObjectFadeRange       &obj,
    const ArrangerObjectFadeRange &other,
    utils::ObjectCloneType         clone_type)
  {
    obj.start_offset_->setTicks (other.start_offset_->ticks ());
    obj.end_offset_->setTicks (other.end_offset_->ticks ());
    obj.fade_in_opts_ = other.fade_in_opts_;
    obj.fade_out_opts_ = other.fade_out_opts_;
  }
 
private:
  static constexpr auto kFadeInOffsetKey = "fadeInOffset"sv;
  static constexpr auto kFadeOutOffsetKey = "fadeOutOffset"sv;
  static constexpr auto kFadeInOptsKey = "fadeInOpts"sv;
  static constexpr auto kFadeOutOptsKey = "fadeOutOpts"sv;
  friend void
  to_json (nlohmann::json &j, const ArrangerObjectFadeRange &object);
  friend void
  from_json (const nlohmann::json &j, ArrangerObjectFadeRange &object);
 
  BOOST_DESCRIBE_CLASS (
    ArrangerObjectFadeRange,
    (),
    (),
    (),
    (start_offset_, end_offset_, fade_in_opts_, fade_out_opts_))
 
private:
  utils::QObjectUniquePtr<dsp::Position> start_offset_;

  utils::QObjectUniquePtr<dsp::Position> end_offset_;

  dsp::CurveOptions                                    fade_in_opts_;
  utils::QObjectUniquePtr<dsp::CurveOptionsQmlAdapter> fade_in_opts_adapter_;

  dsp::CurveOptions                                    fade_out_opts_;
  utils::QObjectUniquePtr<dsp::CurveOptionsQmlAdapter> fade_out_opts_adapter_;
};
} // namespace zrythm::structure::arrangement