breakhack/src/menu.c

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/*
* BreakHack - A dungeone crawler RPG
* Copyright (C) 2018 Linus Probert <linus.probert@gmail.com>
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
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#include <stdlib.h>
#include <stdbool.h>
#include "menu.h"
#include "util.h"
#include "sprite.h"
#include "defines.h"
#include "gui_button.h"
#include "keyboard.h"
#include "mixer.h"
#include "collisions.h"
typedef struct MenuItems {
Sprite *sprite;
Sprite *hsprite;
GuiButton *button;
} MenuItem;
Menu *
menu_create(void)
{
Menu *menu = ec_malloc(sizeof(Menu));
menu->items = linkedlist_create();
menu->selected = 0;
return menu;
}
static bool
handle_keyboard_input(Menu *m, Input *input)
{
int lastSelect = -1;
if (input_key_is_pressed(input, KEY_UP)) {
lastSelect = m->selected;
m->selected--;
} else if (input_key_is_pressed(input, KEY_DOWN)) {
lastSelect = m->selected;
m->selected++;
} else if (input_key_is_pressed(input, KEY_ENTER)) {
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MenuItem *item = linkedlist_get(&m->items, m->selected);
if (item->button->event)
item->button->event(item->button->usrdata);
return true;
} else {
return false;
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}
m->selected = m->selected % linkedlist_size(m->items);
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if (lastSelect != -1)
mixer_play_effect(CLICK);
((MenuItem*) linkedlist_get(&m->items, lastSelect))->button->hover = false;
((MenuItem*) linkedlist_get(&m->items, m->selected))->button->hover = true;
return false;
}
static void
handle_mouse_motion(Menu *m, Input *input)
{
if (!input_mouse_moved(input))
return;
Position p = { input->mouseX, input->mouseY };
LinkedList *items = m->items;
int index = 0;
while (items) {
MenuItem *item = items->data;
items = items->next;
if (position_in_rect(&p, &item->button->area)) {
m->selected = index;
break;
}
index++;
}
}
void
menu_update(Menu *m, Input *input)
{
if (handle_keyboard_input(m, input)) {
return;
}
handle_mouse_motion(m, input);
LinkedList *items = m->items;
while (items) {
MenuItem *item = items->data;
items = items->next;
Position p = { input->mouseX, input->mouseY };
if (position_in_rect(&p, &item->button->area)
&& input_mousebutton_is_pressed(input, MBUTTON_LEFT))
{
item->button->event(NULL);
return;
}
}
}
void
menu_item_add(Menu *m, Sprite *s1, Sprite *s2, void (*event)(void*))
{
MenuItem *item = ec_malloc(sizeof(MenuItem));
item->sprite = s1;
item->hsprite = s2;
SDL_Rect area = {
item->sprite->pos.x,
item->sprite->pos.y,
item->sprite->textures[0]->dim.width,
item->sprite->textures[0]->dim.height
};
item->button = gui_button_create(area, event, NULL);
if (linkedlist_size(m->items) == 0)
item->button->hover = true;
linkedlist_append(&m->items, item);
}
void
menu_render(Menu *m, Camera *cam)
{
LinkedList *items = m->items;
int index = 0;
while (items) {
MenuItem *item = items->data;
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items = items->next;
if (m->selected == index)
sprite_render(item->hsprite, cam);
else
sprite_render(item->sprite, cam);
index++;
}
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}
static void
menu_item_destroy(MenuItem *item)
{
if (item->sprite)
sprite_destroy(item->sprite);
if (item->hsprite)
sprite_destroy(item->hsprite);
gui_button_destroy(item->button);
free(item);
}
void
menu_destroy(Menu *m)
{
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while (m->items)
menu_item_destroy(linkedlist_pop(&m->items));
free(m);
}