knob.h

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// SPDX-FileCopyrightText: © 2019-2022 Alexandros Theodotou <alex@zrythm.org>
// SPDX-License-Identifier: LicenseRef-ZrythmLicense
 
#ifndef __GUI_WIDGETS_KNOB_H__
#define __GUI_WIDGETS_KNOB_H__
 
#include <stdbool.h>
 
#include "utils/types.h"
 
#include <gtk/gtk.h>
 
#define KNOB_WIDGET_TYPE (knob_widget_get_type ())
G_DECLARE_FINAL_TYPE (KnobWidget, knob_widget, Z, KNOB_WIDGET, GtkWidget)
 
 
typedef enum KnobType
{
  KNOB_TYPE_NORMAL,
 
  KNOB_TYPE_PORT_MULTIPLIER,
} KnobType;
 
typedef struct Port Port;
 
typedef struct _KnobWidget
{
  GtkWidget parent_instance;
 
  KnobType type;
 
  GenericFloatGetter getter;
 
  GenericFloatGetter default_getter;
 
  GenericFloatGetter snapped_getter;
 
  GenericFloatSetter setter;
 
  GenericFloatSetter init_setter;
 
  GenericFloatSetter end_setter;
 
  GenericStringCopyGetter 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;
 
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, KNOB_TYPE_NORMAL, min, max, \
    size, zero)
 
#define knob_widget_new_port(conn, size) \
  _knob_widget_new ( \
    NULL, NULL, (void *) conn, KNOB_TYPE_PORT_MULTIPLIER, 0.f, 1.f, size, 0.f)
 
#endif