view examples/example-ui/button-glower.c @ 507:d49a05e7a5b5

ui: separate delegate/style Now UI elements do have different styling properties: - _delegate: functions used to update, draw or perform specific actions on the UI element. - _style: basic properties that the delegate should support if possible.
author David Demelier <markand@malikania.fr>
date Thu, 02 Mar 2023 21:36:43 +0100
parents examples/example-ui/button-style-glow.h@e205625015ba
children 7e7c6786d21e
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/*
 * button-style-glow.c -- example of glowing button
 *
 * Copyright (c) 2020-2023 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 <assert.h>

#include "button-glower.h"

static void
update(struct mlk_button_delegate *delegate, struct mlk_button *button, unsigned int ticks)
{
	(void)button;

	struct button_glower *glower = delegate->data;

	mlk_glower_update(&glower->glower, ticks);
	glower->style.bg_color = glower->glower.color;
}

void
button_glower_init(struct button_glower *glower, struct mlk_button *button)
{
	assert(glower);

	glower->style.bg_color = glower->glower.start;
	glower->delegate.data = glower;
	glower->delegate.update = update;

	/* Link this style and delegate to the button. */
	button->style = &glower->style;
	button->delegate = &glower->delegate;

	mlk_glower_init(&glower->glower);
}