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/* menu.c - Copyright (C) 2001-2002 Jacob Kroon, see COPYING for details */
#include <stdlib.h>
#include <string.h>
#include <SDL_events.h>
#include <SDL_timer.h>
#include "video.h"
#include "font.h"
#include "tuxpuck.h"
/* defines */
#define BORDER_SIZE 5
#define BORDER_COLOR (video_map_rgb(170, 140, 110))
#define BORDER_SPACING 20
#define FIELD_SPACING 15
/* structs */
struct _Menu {
int nbr_of_fields;
int *selectable;
int selected;
char **text;
};
/* externals */
extern unsigned char monob_fnt[];
/* static variables */
static Font *_font = NULL;
/* static functions */
static void _menu_select_previous(Menu * menu)
{
int selected = menu->selected;
do {
selected--;
if (selected < 0)
selected = menu->nbr_of_fields - 1;
} while (menu->selectable[selected] == 0);
menu->selected = selected;
}
static void _menu_select_next(Menu * menu)
{
int selected = menu->selected;
do {
selected++;
if (selected >= menu->nbr_of_fields)
selected = 0;
} while (menu->selectable[selected] == 0);
menu->selected = selected;
}
static void _menu_blit(Menu * menu, SDL_Rect * erase_rect)
{
int total_height = 0, total_width = 0, i, ruler_y;
SDL_Rect rect;
for (i = 0; i < menu->nbr_of_fields; i++) {
total_height += font_calc_height(_font, menu->text[i]);
if (font_calc_width(_font, menu->text[i]) > total_width)
total_width = font_calc_width(_font, menu->text[i]);
}
total_width += 2 * BORDER_SPACING;
total_height +=
2 * BORDER_SPACING + (menu->nbr_of_fields - 1) * FIELD_SPACING;
rect.w = total_width;
rect.h = total_height;
rect.x = SCREEN_W / 2 - total_width / 2;
rect.y = SCREEN_H / 2 - total_height / 2;
if (erase_rect != NULL) {
erase_rect->x = rect.x - BORDER_SIZE;
erase_rect->y = rect.y - BORDER_SIZE;
erase_rect->w = rect.w + 2 * BORDER_SIZE;
erase_rect->h = rect.h + 2 * BORDER_SIZE;
}
video_fill(0, 128, &rect);
rect.x -= BORDER_SIZE;
rect.y -= BORDER_SIZE;
rect.w = BORDER_SIZE;
rect.h += 2 * BORDER_SIZE;
video_fill(BORDER_COLOR, 255, &rect);
rect.x += BORDER_SIZE + total_width;
video_fill(BORDER_COLOR, 255, &rect);
rect.x -= total_width;
rect.w = total_width;
rect.h = BORDER_SIZE;
video_fill(BORDER_COLOR, 255, &rect);
rect.y += total_height + BORDER_SIZE;
video_fill(BORDER_COLOR, 255, &rect);
ruler_y = SCREEN_H / 2 - total_height / 2 + BORDER_SPACING;
font_set_alpha(_font, 255);
font_set_color(_font, 255, 255, 255);
for (i = 0; i < menu->nbr_of_fields; i++) {
ruler_y += font_calc_height(_font, menu->text[i]);
font_set_pen(_font,
SCREEN_W / 2 - font_calc_width(_font, menu->text[i]) / 2,
ruler_y);
ruler_y += FIELD_SPACING;
if (!menu->selectable[i]) {
font_set_color(_font, 20, 155, 55);
font_print(_font, menu->text[i], NULL);
font_set_color(_font, 255, 255, 255);
} else if (menu->selected == i) {
font_set_color(_font, 255, 0, 0);
font_print(_font, menu->text[i], NULL);
font_set_color(_font, 255, 255, 255);
} else
font_print(_font, menu->text[i], NULL);
}
}
/* functions */
Menu *menu_create(int nbr_of_fields)
{
Menu *menu;
menu = malloc(sizeof(*menu));
menu->selected = -1;
menu->nbr_of_fields = nbr_of_fields;
menu->text = malloc(nbr_of_fields * sizeof(char *));
memset(menu->text, 0, nbr_of_fields * sizeof(char *));
menu->selectable = malloc(nbr_of_fields * sizeof(int));
memset(menu->selectable, 0, nbr_of_fields * sizeof(int));
if (_font == NULL)
_font = font_create(monob_fnt, NULL);
return menu;
}
void menu_add_field(Menu * menu, int position, int selectable, char *text)
{
menu->text[position] = malloc(strlen(text) + 1);
strcpy(menu->text[position], text);
menu->selectable[position] = selectable;
if (menu->selected == -1 && selectable)
menu->selected = position;
}
int menu_get_selected(Menu * menu)
{
int loop = 1;
SDL_Event event;
SDL_Rect rect;
SDL_Surface *background;
SDL_WM_GrabInput(SDL_GRAB_OFF);
background = video_duplicate();
if (menu->selected == -1)
_menu_select_next(menu);
_menu_blit(menu, &rect);
video_update();
while (loop) {
while (SDL_PollEvent(&event)) {
switch (event.type) {
case SDL_KEYDOWN:
switch (event.key.keysym.sym) {
case SDLK_ESCAPE:
menu->selected = -1;
loop = 0;
break;
case SDLK_RETURN:
loop = 0;
break;
case SDLK_UP:
_menu_select_previous(menu);
video_blit(background, &rect, &rect);
_menu_blit(menu, NULL);
video_update();
break;
case SDLK_DOWN:
_menu_select_next(menu);
video_blit(background, &rect, &rect);
_menu_blit(menu, NULL);
video_update();
default:
break;
}
break;
}
}
SDL_Delay(SLEEP);
}
SDL_WM_GrabInput(SDL_GRAB_ON);
video_blit(background, &rect, &rect);
SDL_FreeSurface(background);
return menu->selected;
}
void menu_free(Menu * menu)
{
int i;
for (i = 0; i < menu->nbr_of_fields; i++)
if (menu->text[i] != NULL)
free(menu->text[i]);
free(menu->selectable);
free(menu);
}
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