grid_line_computer.h

// SPDX-FileCopyrightText: © 2026 Alexandros Theodotou <alex@zrythm.org>
// SPDX-License-Identifier: LicenseRef-ZrythmLicense
 
#pragma once
 
#include <optional>
#include <vector>
 
namespace zrythm::dsp
{
class TempoMapWrapper;
}
 
namespace zrythm::gui::qquick
{

struct GridLine
{
  float x{ 0.0f };      
  int   bar{ 0 };       
  int   beat{ 0 };      
  int   sixteenth{ 0 }; 
};

struct ComputedGridLines
{
  std::vector<GridLine> bar_lines;
  std::vector<GridLine> beat_lines;
  std::vector<GridLine> sixteenth_lines;
  // Beat lines whose labels are visible (empty if label threshold was not
  // requested).
  std::vector<GridLine> beat_label_lines;
  // True when sixteenth lines are wide enough for labels (only set when label
  // threshold was requested)
  bool show_sixteenth_labels{ false };
 
  void clear ()
  {
    bar_lines.clear ();
    beat_lines.clear ();
    sixteenth_lines.clear ();
    beat_label_lines.clear ();
    show_sixteenth_labels = false;
  }
};

void
compute_grid_lines (
  const dsp::TempoMapWrapper &tempo_map,
  float                       px_per_tick,
  float                       visible_start_tick,
  float                       visible_end_tick,
  float                       detail_measure_px_threshold,
  std::optional<float>        detail_measure_label_px_threshold,
  ComputedGridLines          &result);
 
} // namespace zrythm::gui::qquick