knob.h

// SPDX-FileCopyrightText: © 2019-2022, 2024 Alexandros Theodotou <alex@zrythm.org>
// SPDX-License-Identifier: LicenseRef-ZrythmLicense OR GPL-2.0-or-later
 
#ifndef __GUI_WIDGETS_KNOB_H__
#define __GUI_WIDGETS_KNOB_H__
 
#include "common/utils/types.h"
#include "gui/backend/gtk_widgets/gtk_wrapper.h"
 
#define KNOB_WIDGET_TYPE (knob_widget_get_type ())
G_DECLARE_FINAL_TYPE (KnobWidget, knob_widget, Z, KNOB_WIDGET, GtkWidget)
 

 

enum class KnobType
{
  KNOB_TYPE_NORMAL,

  KNOB_TYPE_PORT_MULTIPLIER,
};
 
class Port;

using KnobWidget = struct _KnobWidget
{
  GtkWidget parent_instance;
 
  KnobType type;

  GenericFloatGetter getter;

  GenericFloatGetter default_getter;

  GenericFloatGetter snapped_getter;

  GenericFloatSetter setter;

  GenericFloatSetter init_setter;

  GenericFloatSetter end_setter;

  GenericStringGetter hover_str_getter;

  void * object;

  int size;
  bool hover;
  float zero;
  bool arc;
  int bevel;
  bool flat;
  float min;
  float max;

  GdkRGBA start_color;
  GdkRGBA end_color;

  GtkGestureDrag * drag;
  double last_x;
  double last_y;
 
  bool drag_updated;
 
  PangoLayout * layout;

  float last_real_val;

  GtkPopoverMenu * popover_menu;
};

KnobWidget *
_knob_widget_new (
  GenericFloatGetter get_val,
  GenericFloatGetter get_default_val,
  GenericFloatSetter set_val,
  void *             object,
  KnobType           type,
  float              min,
  float              max,
  int                size,
  float              zero);
 
#define knob_widget_new_simple( \
  getter, default_getter, setter, obj, min, max, size, zero) \
  _knob_widget_new ( \
    (GenericFloatGetter) getter, (GenericFloatGetter) default_getter, \
    (GenericFloatSetter) setter, (void *) obj, KnobType::KNOB_TYPE_NORMAL, \
    min, max, size, zero)

#define knob_widget_new_port(conn, size) \
  _knob_widget_new ( \
    nullptr, nullptr, (void *) conn, KnobType::KNOB_TYPE_PORT_MULTIPLIER, 0.f, \
    1.f, size, 0.f)

 
#endif