Mercurial > molko
view examples/example-drawable.c @ 149:a43e79d489ea
ui: allow custom position of labels
author | David Demelier <markand@malikania.fr> |
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date | Thu, 15 Oct 2020 10:45:40 +0200 |
parents | c577c15df07f |
children | 9733d379be89 |
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/* * example-drawable.c -- example on how to use automatic drawables * * Copyright (c) 2020 David Demelier <markand@malikania.fr> * * Permission to use, copy, modify, and/or distribute this software for any * purpose with or without fee is hereby granted, provided that the above * copyright notice and this permission notice appear in all copies. * * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. */ #include <stdlib.h> #include <core/animation.h> #include <core/clock.h> #include <core/event.h> #include <core/drawable.h> #include <core/key.h> #include <core/painter.h> #include <core/panic.h> #include <core/sys.h> #include <core/image.h> #include <core/sprite.h> #include <core/texture.h> #include <core/util.h> #include <core/window.h> #include <ui/label.h> #include <ui/theme.h> #include <assets/sprites/explosion.h> #define W 1280 #define H 720 static struct label help = { .text = "Keys: <Esc> to reset. Click anywhere to spawn a drawable.", .x = 10, .y = 10, .w = W, .h = H, .align = LABEL_ALIGN_TOP_LEFT, .flags = LABEL_FLAGS_SHADOW }; #if 0 // TODO: for the moment only animations are supported. static unsigned int which_selection; static char which_text[128]; static struct label which = { .text = buf, .x = 10, .y = 40, .w = W, .h = 32, .flags = LABEL_NO_HCENTER, .color = 0x4f8fbaff }; #endif static struct drawable_stack stack; /* * List of drawables for this example. * ----------------------------------------------------------------------------- */ /* 0: Explosion animation. */ static struct texture explosion_tex; static struct sprite explosion_sprite; struct explosion { struct animation anim; struct drawable dw; }; static void init(void) { if (!sys_init() || !window_init("Example - Drawable", W, H) || !theme_init()) panic(); /* 0: Explosion animation. */ if (!image_openmem(&explosion_tex, sprites_explosion, sizeof (sprites_explosion))) panic(); sprite_init(&explosion_sprite, &explosion_tex, 256, 256); } static void explosion_finish(struct drawable *dw) { free(dw->data); } static void spawn(int x, int y) { struct explosion *expl = emalloc(sizeof (struct explosion)); animation_init(&expl->anim, &explosion_sprite, 100); animation_drawable(&expl->anim, &expl->dw, x, y); /* * This work because the drawable->data field expects a struct animation * pointer which is the first member of struct explosion. * * Thus this "poor man inheritance" trick works perfectly in our case * and we simply need to free the whole explosion struct afterwards. */ expl->dw.finish = explosion_finish; drawable_stack_add(&stack, &expl->dw); } static void run(void) { struct clock clock = {0}; clock_start(&clock); for (;;) { union event ev; unsigned int elapsed = clock_elapsed(&clock); clock_start(&clock); while (event_poll(&ev)) { switch (ev.type) { case EVENT_KEYDOWN: switch (ev.key.key) { case KEY_ESCAPE: drawable_stack_finish(&stack); break; default: break; } break; case EVENT_CLICKDOWN: spawn(ev.click.x, ev.click.y); break; case EVENT_QUIT: return; default: break; } } drawable_stack_update(&stack, elapsed); painter_set_color(0xebede9ff); painter_clear(); label_draw(&help); drawable_stack_draw(&stack); painter_present(); if ((elapsed = clock_elapsed(&clock)) < 20) delay(20 - elapsed); } } static void quit(void) { } int main(int argc, char **argv) { (void)argc; (void)argv; init(); run(); quit(); }