njin_ui_layout.h

#pragma once
#include "_math.h"
#include "_types.h"
#include "njin_json.h"
#include "njin_ui.h"
#include <functional>
#include <string>
#include <string_view>
#include <vector>
 
namespace njin {
struct context;


enum class ui_widget_kind {
  label,    
  space,    
  button,   
  toggle,   
  slider,   
  choice,   
  progress, 
  image,    
  row,      
  keybind,  
  circle,   
};

struct ui_widget_data {
  ui_widget_kind kind = ui_widget_kind::label; 
  std::string id;       
  std::string label;    
  std::string text;     
  bool enabled = true;  
 
  // Giá trị tương tác
  bool bool_val = false;       
  f32 float_val = 0.0f;        
  f32 min_val = 0.0f;          
  f32 max_val = 1.0f;          
  f32 step = 0.0f;             
  bool percent = false;        
 
  i32 int_val = 0;                     
  std::vector<std::string> options;    
 
  // Kích thước & bố cục
  f32 height = 10.0f;          
  i32 columns = 2;             
 
  // Ảnh (kind == image)
  std::string texture_path;    
  texture_handle texture{};    
  vec2 size{64.0f, 64.0f};     
  rect source{};               
 
  // Vòng tiến độ (kind == circle): dùng thêm float_val, text và percent
  f32 diameter = 96.0f;        
  f32 thickness = 10.0f;       
  f32 start_angle = 0.0f;      
  bool clockwise = true;       
  bool round_caps = false;     
  bool show_track = true;      
  rgba track_color{0.0f, 0.0f, 0.0f, 0.0f}; 
  rgba fill_color{0.0f, 0.0f, 0.0f, 0.0f};  
 
  // Keybind (kind == keybind)
  std::string action_name;     
  bool pad = false;            
 
  // Trạng thái frame vừa qua
  bool clicked = false;        
  bool changed = false;        
};

struct ui_panel_data {
  std::string id = "panel";    
  std::string title;           
  vec2 anchor{0.5f, 0.5f};     
  vec2 pivot{0.5f, 0.5f};      
  vec2 offset{0.0f, 0.0f};     
  f32 width = 0.0f;            
  bool background = true;      
  bool visible = true;         
  std::vector<ui_widget_data> widgets; 

  ui_widget_data *find_widget(std::string_view widget_id);
  const ui_widget_data *find_widget(std::string_view widget_id) const;
};

struct ui_popup_data {
  std::string id = "popup";                
  std::string title;                       
  std::string message;                     
  std::vector<std::string> buttons{"OK"};  
  i32 default_button = 0;                  
  i32 cancel_button = -1;                  
  f32 width = 0.0f;                        
  bool open = false;           
};

struct ui_layout {
  i32 version = 1;                         
  vec2 design_resolution{1280.0f, 720.0f}; 
  ui_style style = ui_default_style();     
  bool custom_style = false;               
  std::vector<ui_panel_data> panels;       
  std::vector<ui_popup_data> popups;       

  ui_panel_data *find_panel(std::string_view panel_id);
  const ui_panel_data *find_panel(std::string_view panel_id) const;

  ui_widget_data *find_widget(std::string_view widget_id);
  const ui_widget_data *find_widget(std::string_view widget_id) const;

  ui_popup_data *find_popup(std::string_view popup_id);
  const ui_popup_data *find_popup(std::string_view popup_id) const;
};

struct ui_layout_event {
  enum kind_t {
    none,
    button_clicked,   
    value_changed,    
    popup_dismissed,  
  } kind = none; 
 
  const char *panel_id = "";  
  const char *widget_id = "";
  bool bool_val = false;      
  f32 float_val = 0.0f;       
  i32 int_val = 0;            
};

using ui_event_callback = std::function<void(const ui_layout_event &)>;

ui_style ui_pixel_style();

bool ui_layout_load(context &ctx, const char *path, ui_layout &out);

bool ui_layout_parse(const json_value &json, ui_layout &out);

json_value ui_layout_to_json(const ui_layout &layout);

bool ui_layout_save(const char *path, const ui_layout &layout, bool pretty = true);

bool ui_draw_panel(context &ctx, ui_layout &layout, const char *panel_id,
                   const ui_event_callback &on_event = nullptr);

void ui_draw_layout(context &ctx, ui_layout &layout,
                    const ui_event_callback &on_event = nullptr);
 
// --- Các hàm tiện ích đọc / ghi trạng thái widget ---

bool ui_layout_is_clicked(const ui_layout &layout, const char *widget_id);

bool ui_layout_get_bool(const ui_layout &layout, const char *widget_id, bool fallback = false);

void ui_layout_set_bool(ui_layout &layout, const char *widget_id, bool value);

f32 ui_layout_get_float(const ui_layout &layout, const char *widget_id, f32 fallback = 0.0f);

void ui_layout_set_float(ui_layout &layout, const char *widget_id, f32 value);

i32 ui_layout_get_int(const ui_layout &layout, const char *widget_id, i32 fallback = 0);

void ui_layout_set_int(ui_layout &layout, const char *widget_id, i32 value);

const char *ui_layout_get_text(const ui_layout &layout, const char *widget_id, const char *fallback = "");

void ui_layout_set_text(ui_layout &layout, const char *widget_id, const char *text);

std::string ui_layout_generate_cpp(const ui_layout &layout, const char *func_name = "draw_ui");

std::string ui_panel_generate_cpp(const ui_panel_data &panel, const char *func_name = "draw_panel");

} // namespace njin