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"
typedef struct MenuItems_t {
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 void
handle_keyboard_event(Menu *m, SDL_Event *event)
{
int lastSelect = -1;
if (keyboard_direction_press(UP, event)) {
lastSelect = m->selected;
m->selected--;
} else if (keyboard_direction_press(DOWN, event)) {
lastSelect = m->selected;
m->selected++;
} else if (keyboard_press(SDLK_RETURN, event)) {
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MenuItem *item = linkedlist_get(&m->items, m->selected);
if (item->button->event)
item->button->event(item->button->usrdata);
return;
} else {
return;
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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;
}
static void
handle_mouse_motion_event(Menu *m, SDL_Event *event)
{
LinkedList *items;
int current_select;
bool activeItemFound = false;
items = m->items;
current_select = 0;
while (items) {
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MenuItem *item = items->data;
items = items->next;
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item->button->hover = false;
gui_button_handle_event(item->button, event);
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if (item->button->hover) {
if (current_select != m->selected) {
mixer_play_effect(CLICK);
m->selected = current_select;
}
activeItemFound = true;
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}
current_select++;
}
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if (!activeItemFound)
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((MenuItem*) linkedlist_get(&m->items, m->selected))->button->hover = true;
}
static void
handle_mouse_button_event(Menu *m, SDL_Event *event)
{
/* NOTE: In some cases the button/item is destroyed by the click action
* make sure you don't 'use' items after a click event has fired. It
* might break. */
MenuItem *item = linkedlist_get(&m->items, m->selected);
gui_button_handle_event(item->button, event);
}
void
menu_handle_event(Menu *m, SDL_Event *event)
{
if (event->type == SDL_KEYDOWN)
handle_keyboard_event(m, event);
else if (event->type == SDL_MOUSEMOTION)
handle_mouse_motion_event(m, event);
else if (event->type == SDL_MOUSEBUTTONDOWN)
handle_mouse_button_event(m, event);
}
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;
while (items) {
MenuItem *item = items->data;
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items = items->next;
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if (item->button->hover)
sprite_render(item->hsprite, cam);
else
sprite_render(item->sprite, cam);
}
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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);
}