breakhack/src/gui_button.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/>.
*/
#include <stdlib.h>
#include "util.h"
#include "gui_button.h"
#include "collisions.h"
GuiButton *
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gui_button_create(SDL_Rect area, void (*event)(void*), void *usrdata)
{
GuiButton *button = ec_malloc(sizeof(GuiButton));
button->area = area;
button->hover = false;
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button->usrdata = usrdata;
button->event = event;
return button;
}
void
gui_button_check_pointer(GuiButton *button, Pointer *pointer)
{
button->hover = position_in_rect(&pointer->sprite->pos, &button->area);
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pointer_toggle_clickable_pointer(pointer, button->hover);
}
void
gui_button_handle_event(GuiButton *button, SDL_Event *event)
{
if (event->type == SDL_MOUSEBUTTONDOWN) {
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if (event->button.button != SDL_BUTTON_LEFT)
return;
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Position p = { event->button.x, event->button.y };
if (position_in_rect(&p, &button->area) && button->event)
button->event(button->usrdata);
} else if (event->type == SDL_MOUSEMOTION) {
Position p = { event->motion.x, event->motion.y };
button->hover = position_in_rect(&p, &button->area);
}
}
void
gui_button_destroy(GuiButton *button)
{
free(button);
}