nesemu/gui/components/window_menu.h

//
// Created by william on 8/23/24.
//

#ifndef NES_EMULATOR_WINDOW_MENU_H
#define NES_EMULATOR_WINDOW_MENU_H

#include "window.h"
#include "linked_list.h"
#include "component.h"

#define MENU_HEIGHT 24
#define MENU_VISIBLE_HEIGHT 64;
#define MENU_BACKGROUND_COLOR 0xff353535
#define MENU_HIGHLIGHT_COLOR 0xff4d4d4d
#define MENU_TEXT_COLOR {0xff, 0xff, 0xff}
#define MENU_ITEM_MARGIN_X 20
#define MENU_ITEM_MARGIN_Y 4

typedef struct menu_item_component {
    char *label;
    int click_action_type;

    bool is_highlighted;

    LinkedList sub_items;
    SDL_Texture *label_texture;
    SDL_Rect draw_rect;
    SDL_Rect collision_rect;
} MenuItemComponent;

typedef void (*menu_action_processor)(int);

typedef struct menu_component {
    int window_width;
    bool visible;

    menu_action_processor action_processor;
    LinkedList items;
    MenuItemComponent *highlight_item;

    SDL_Renderer *renderer;
    TTF_Font *font;
    SDL_Texture *background_texture;
    SDL_Texture *highlight_texture;
} MenuComponent;

/**
 * Creates a menu fow a window.
 * @param window A reference to the window
 * @param font A reference to the TTF font to use to render text
 * @param action_processor A reference to a function that will processes actions
 * @return A reference to the menu component
 */
MenuComponent *menu_create(Window *window, TTF_Font *font, menu_action_processor action_processor);

/**
 * Creates a menu item. Can be configured with a callback function which will be called when the menu item is clicked.
 * Note that the callback function will be overridden if the menu item has sub items.
 * @param label The label of the menu item
 * @param on_click The callback function to call when clicked
 * @return A reference to the menu item
 */
MenuItemComponent *menu_item_create(char *label, int click_action_type);

/**
 * Adds an item to a menu.
 * @param menu A reference to the menu
 * @param menu_item A reference to the menu item to add to the menu
 */
void menu_append(MenuComponent *menu, MenuItemComponent *menu_item);

/**
 * Adds an sub-item to a menu item.
 * Note that this will have the effect of preventing the callback to be called.
 * @param menu_item A reference to the menu item
 * @param sub_item A reference to the sub item to add to the menu item
 */
void menu_item_append(MenuItemComponent *menu_item, MenuItemComponent *sub_item);

/**
 * Builds the ressources needed for a menu to be displayed. (ex: textures)
 * @param menu The menu to build
 */
void menu_build(MenuComponent *menu);

/**
 * Renders a menu to its window.
 * @param menu A reference to the menu to render
 */
void menu_render(MenuComponent *menu);

/**
 * Destroys a menu, freeing its memory.
 * @param menu A reference to the menu to destroy
 */
void menu_destroy(MenuComponent *menu);

/**
 * Destroys a menu item to free its memory.
 * @param menu_item A reference to the menu item to destroy
 */
void menu_item_destroy(MenuItemComponent *menu_item);

/**
 * Returns a menu as a component.
 * @param menu The menu
 * @return
 */
Component *menu_as_component(MenuComponent *menu);

#endif //NES_EMULATOR_WINDOW_MENU_H