clip_canvas_item_base.h

// SPDX-FileCopyrightText: © 2026 Alexandros Theodotou <alex@zrythm.org>
// SPDX-License-Identifier: LicenseRef-ZrythmLicense
 
#pragma once
 
#include <QtCanvasPainter/qcanvaspainteritem.h>
 
namespace zrythm::gui::qquick
{

class ClipCanvasItemBase : public QCanvasPainterItem
{
  Q_OBJECT
 
  Q_PROPERTY (
    qreal referenceWidth READ referenceWidth WRITE setReferenceWidth NOTIFY
      referenceWidthChanged)
  Q_PROPERTY (
    qreal referenceX READ referenceX WRITE setReferenceX NOTIFY referenceXChanged)
  Q_PROPERTY (
    bool loopPreview READ loopPreview WRITE setLoopPreview NOTIFY
      loopPreviewChanged)
 
public:
  explicit ClipCanvasItemBase (QQuickItem * parent = nullptr)
      : QCanvasPainterItem (parent)
  {
    // Default fillColor is black — make transparent so the clip background
    // shows through, and enable alpha blending for non-opaque pixels.
    setFillColor (Qt::transparent);
    setAlphaBlending (true);
  }
 
  qreal referenceWidth () const { return reference_width_; }
  void  setReferenceWidth (qreal w)
  {
    if (qFuzzyCompare (reference_width_, w))
      return;
    reference_width_ = w;
    Q_EMIT referenceWidthChanged ();
    update ();
  }
 
  qreal referenceX () const { return reference_x_; }
  void  setReferenceX (qreal x)
  {
    if (qFuzzyCompare (reference_x_, x))
      return;
    reference_x_ = x;
    Q_EMIT referenceXChanged ();
    update ();
  }


  qreal effectiveReferenceWidth () const
  {
    return (reference_width_ > 0) ? reference_width_ : width ();
  }

  bool loopPreview () const { return loop_preview_; }
  void setLoopPreview (bool preview)
  {
    if (loop_preview_ == preview)
      return;
    loop_preview_ = preview;
    Q_EMIT loopPreviewChanged ();
    update ();
  }
 
Q_SIGNALS:
  void referenceWidthChanged ();
  void referenceXChanged ();
  void loopPreviewChanged ();
 
private:
  qreal reference_width_ = 0;
  qreal reference_x_ = 0;
  bool  loop_preview_ = false;
};
 
} // namespace zrythm::gui::qquick