audio_region_waveform_canvas_item.h

// SPDX-FileCopyrightText: © 2026 Alexandros Theodotou <alex@zrythm.org>
// SPDX-License-Identifier: LicenseRef-ZrythmLicense
 
#pragma once
 
#include <cstdint>
 
#include "gui/qquick/waveform_canvas_item.h"
 
#include <QPointer>
#include <QtQmlIntegration/qqmlintegration.h>
 
namespace zrythm::structure::arrangement
{
class AudioRegion;
}
 
namespace zrythm::gui::qquick
{

class AudioRegionWaveformCanvasItem : public WaveformCanvasItem
{
  Q_OBJECT
  QML_NAMED_ELEMENT (AudioRegionWaveformCanvas)
 
  Q_PROPERTY (QObject * region READ region WRITE setRegion NOTIFY regionChanged)
 
public:
  explicit AudioRegionWaveformCanvasItem (QQuickItem * parent = nullptr);
 
  QObject * region () const { return region_; }
  void      setRegion (QObject * region);
 
Q_SIGNALS:
  void regionChanged ();
 
private:
  struct RegionSnapshot
  {
    int64_t clip_start_samples{};
    int64_t loop_start_samples{};
    int64_t loop_end_samples{};
    int64_t length_samples{};
    int64_t fade_in_samples{};
    int64_t fade_out_samples{};
    float   gain{ 1.0f };
 
    friend bool
    operator== (const RegionSnapshot &, const RegionSnapshot &) = default;
  };
 
  RegionSnapshot take_snapshot () const;
 
  void handle_property_change ();
 
  QObject *                                     region_ = nullptr;
  QPointer<structure::arrangement::AudioRegion> audio_region_;
  std::vector<QMetaObject::Connection>          region_connections_;
  RegionSnapshot                                last_snapshot_;
};
 
} // namespace zrythm::gui::qquick