LCOM1920-T5G03

#include <lcom/lcf.h>

#include "menu.h"

#include "graph.h"

#include "rectangle.h"

#include "proj_func.h"

#include "proj_macros.h"

#include "errors.h"

const int W  = 400;

const int H  = 60;

const int W1 = 40;

const int H1 = 40;

const int H2 = 20;

struct menu {

    const font_t *fnt;

    size_t sz;

    rectangle_t **r;

    text_t      **t;

    rectangle_t *frame;

};

menu_t* (menu_ctor)(const font_t *fnt){

    if(fnt == NULL) return NULL;

    menu_t *ret = (menu_t*)malloc(sizeof(menu_t));

    if (ret == NULL) return NULL;

    ret->fnt = fnt;

    ret->sz = 0;

    ret->r = NULL;

    ret->t = NULL;

    ret->frame = rectangle_ctor(0, 0, 800, 500);

    rectangle_set_fill_color(ret->frame, GRAPH_BLACK);

    rectangle_set_outline_width(ret->frame, 6);

    rectangle_set_outline_color(ret->frame, GRAPH_WHITE);

    rectangle_set_fill_trans(ret->frame, GRAPH_TRANSPARENT);

    return ret;

}

static int menu_recalculate(menu_t *menu){

    const int Wtotal = 2*W1+W;

    const int Htotal = 2*H1+menu->sz*H+(menu->sz-1)*H2;

    int x = graph_get_XRes()/2-Wtotal/2;

    int y = graph_get_YRes()/2-Htotal/2;

    rectangle_set_pos (menu->frame, x, y);

    rectangle_set_size(menu->frame, Wtotal, Htotal);

    x += W1; y += H1;

    for(size_t i = 0; i < menu->sz; ++i, y+=H+H2){

        rectangle_set_pos(menu->r[i], x, y);

        text_set_pos     (menu->t[i], x+W/2, y+H/2);

    }

    return SUCCESS;

}

int (menu_add_item)(menu_t *menu, const char *s){

    rectangle_t *r = rectangle_ctor(0, 0, W, H);

    text_t      *t = text_ctor(menu->fnt, s);

    if(r == NULL || t == NULL){

        rectangle_dtor(r);

        text_dtor(t);

        return NULL_PTR;

    }

    rectangle_set_fill_color   (r, GRAPH_BLACK);

    rectangle_set_outline_width(r, 2);

    rectangle_set_outline_color(r, GRAPH_WHITE);

    text_set_valign(t, text_valign_center);

    text_set_halign(t, text_halign_center);

    text_set_color (t, TEXT_COLOR);

    ++menu->sz;

    menu->r = realloc(menu->r, menu->sz*sizeof(rectangle_t*));

    menu->t = realloc(menu->t, menu->sz*sizeof(text_t     *));

    menu->r[menu->sz-1] = r;

    menu->t[menu->sz-1] = t;

    return menu_recalculate(menu);

}

int (menu_update_state)(menu_t *menu, int click) {

    if(!click) return -1;

    for(size_t i = 0; i < menu->sz; ++i)

        if(rectangle_collide_point(menu->r[i], *get_mouse_X(), *get_mouse_Y()))

            return i;

    return -1;

}

void (menu_draw)(menu_t *menu) {

    rectangle_draw(menu->frame);

    int x = *get_mouse_X(), y = *get_mouse_Y();

    for(size_t i = 0; i < menu->sz; ++i){

        if(rectangle_collide_point(menu->r[i], x, y))

            rectangle_set_fill_color(menu->r[i], HIGHLIGHT_COLOR);

        rectangle_draw(menu->r[i]);

        text_draw     (menu->t[i]);

    }

    for(size_t i = 0; i < menu->sz; ++i)

        if(rectangle_collide_point(menu->r[i], x, y))

            rectangle_set_fill_color(menu->r[i], GRAPH_BLACK);

}

void (menu_dtor)(menu_t *p){

    for(size_t i = 0; i < p->sz; ++i){

        rectangle_dtor(p->r[i]);

        text_dtor     (p->t[i]);

    }

    rectangle_dtor(p->frame);

    free(p);

}