/**
 * TODO file description
 * 
 * Created on 2020/01/05.
 */

#ifndef REFLOWER_SCENE_MENU_H
#define REFLOWER_SCENE_MENU_H

#include <stdint.h>
#include <stddef.h>

#define MENUITEM_LABEL_LEN 30

struct MenuItem {
    char label[MENUITEM_LABEL_LEN];
    uint32_t tag;
};

struct MenuScene;

typedef struct SceneEvent (*MenuScene_onSelect_t)(struct MenuScene *scene);

struct MenuScene {
    struct Scene base;
    // items array
    struct MenuItem *items;
    // items count
    size_t items_len;
    // Vertical scroll offset (how many steps is the topmost item moved above the screen)
    int32_t scroll_up;
    // Selected item number
    int32_t selected;
    // selection handler
    MenuScene_onSelect_t onSelect;
    // Extra field for the instance's private use.
    void *private;
};

struct MenuScene *NewScene_Menu(struct MenuItem *items, size_t items_len);

#endif //REFLOWER_SCENE_MENU_H