--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/examples/example-ui/button-glower.c	Thu Mar 02 21:36:43 2023 +0100
@@ -0,0 +1,48 @@
+/*
+ * 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);
+}