Remove search_by_id() from frameline. - frameline is only responsible for drawing a row of frames. - layers and scenes are managed by MBScene_dom. So, function of search_by_id() must move to MBScene_dom class. - onCellClick() and _change_active_frame() are responsible for handling GUI event. - It should not be used with workaround to implement some function. - Solutions - MBScene_dom.find_layer_n_scene_of_nod() is used to replace search_by_id(). - MBScene_framelines.active_frame() is used to replace the workaround.

#ifndef __MBBUTTON_H
#define __MBBUTTON_H
typedef struct _mb_button {
    mb_obj_t obj;
    redraw_man_t *rdman;
    int state;
    coord_t *root;
    coord_t *active;
    coord_t *normal;
    coord_t *click;
    void (*press)();
    void *arg;
    observer_t *obs_move,*obs_out,*obs_press;
    mb_progm_t *progm;
} mb_button_t;
mb_button_t *mb_button_new(redraw_man_t *rdman,mb_sprite_t *sp, char *name);
void mb_button_add_onClick(mb_button_t *b, void (*h)(void *arg), void *arg);
#endif