hippie/source/screens/demo/examples/clock.liquid

---
title: Clock
tags:
- demoExample
---
{% assign bodyClass = 'body_clock' -%}
{% layout 'hippie/simple.liquid' %}

{% block body %}
<header class="io pos_fix pin_top pin_right pin_left">
	<button id="tglFormat">12-Stunden-Format</button>
</header>
<main>
	<div class="wrap">
		<canvas id="background" width="768" height="768"></canvas>
		<canvas id="rings" width="768" height="768"></canvas>
	</div>
</main>
{% endblock %}

{% block script %}
<script>
	const canvasBkg = document.getElementById('background');
	const ctxBkg = canvasBkg.getContext('2d');
	const canvasRings = document.getElementById('rings');
	const ctxRings = canvasRings.getContext('2d');
	const centerX = canvasRings.width / 2;
	const centerY = canvasRings.height / 2;

	let is24HourFormat = true;
	let currentDate = new Date();
	let currentMonth = currentDate.getMonth() + 1; // Get current month (0-11)
	let daysInCurrentMonth = daysInMonth(currentMonth, currentDate.getFullYear());

	const outerMargin = 8;
	const ringWidth = 16;
	const ringGap = 8;
	const maxSize = (canvasRings.width / 2 - ringWidth / 2) - outerMargin;
	const rings = [
		{
			radius: maxSize,
			color: 'black'
		},
		{
			radius: maxSize - (ringWidth + ringGap),
			color: 'lightgrey'
		},
		{
			radius: maxSize - (ringWidth + ringGap) * 2,
			color: 'white'
		},
		{
			radius: maxSize - (ringWidth + ringGap) * 3 - ringGap,
			color: getComputedStyle(document.documentElement).getPropertyValue('--clock-color-yellow').trim()
		},
		{
			radius: maxSize - (ringWidth + ringGap) * 4 - ringGap * 2,
			color: getComputedStyle(document.documentElement).getPropertyValue('--clock-color-orange').trim()
		},
		{
			radius: maxSize - (ringWidth + ringGap) * 5 - ringGap * 3,
			color: getComputedStyle(document.documentElement).getPropertyValue('--clock-color-pink').trim()
		},
		{
			radius: maxSize - (ringWidth + ringGap) * 6 - ringGap * 3,
			color: getComputedStyle(document.documentElement).getPropertyValue('--clock-color-purple').trim()
		}
	];
	const sections = [
		{
			radius: rings[1].radius,
			color: `rgba(0, 0, 0, .1)`,
			width: 72
		},
		{
			radius: rings[3].radius,
			color: `rgba(0, 0, 0, .2)`,
			width: ringWidth + ringGap
		},
		{
			radius: rings[4].radius,
			color: `rgba(0, 0, 0, .3)`,
			width: ringWidth + ringGap
		},
		{
			radius: maxSize - (ringWidth + ringGap) * 6 - ringGap - ringGap / 2,
			color: `rgba(0, 0, 0, .4)`,
			width: ringWidth * 2 + ringGap * 2
		}
	];
	const markerColor = `rgba(0, 0, 0, .2)`;
	const markers = [
		{
			amount: 60,
			radius: maxSize,
			width: 1
		},
		{
			amount: 60,
			radius: rings[1].radius,
			width: 1
		},
		{
			amount: is24HourFormat ? 24 : 12,
			radius: rings[2].radius,
			width: 3
		},
		{
			amount: 7,
			radius: rings[3].radius,
			width: 5
		},
		{
			amount: daysInCurrentMonth,
			radius: rings[4].radius,
			width: 3
		},
		{
			amount: 365,
			radius: rings[5].radius,
			width: 1
		},
		{
			amount: 12,
			radius: rings[6].radius,
			width: 3
		}
	];

	document.getElementById('tglFormat').addEventListener('click', () => {
		is24HourFormat = !is24HourFormat;
		document.getElementById('tglFormat').textContent = is24HourFormat ? '12-Stunden-Format' : '24-Stunden-Format';
	});

	sections.forEach((section) => {
		ctxBkg.strokeStyle = section.color;
		ctxBkg.lineWidth = section.width;
		ctxBkg.beginPath();
		ctxBkg.arc(centerX, centerY, section.radius, 0, 2 * Math.PI);
		ctxBkg.stroke();
	});

	markers.forEach((marker) => {
		for (let i = 0; i < marker.amount; i++) {
			const angle = (i * (360 / marker.amount) - 90) * (Math.PI / 180); // -90 to start at top
			const outerRadius = marker.radius + ringWidth / 2;
			const outerX = centerX + outerRadius * Math.cos(angle);
			const outerY = centerY + outerRadius * Math.sin(angle);
			const innerRadius = marker.radius - ringWidth / 2;
			const innerX = centerX + innerRadius * Math.cos(angle);
			const innerY = centerY + innerRadius * Math.sin(angle);

			ctxBkg.strokeStyle = markerColor;
			ctxBkg.lineWidth = marker.width;
			ctxBkg.beginPath();
			ctxBkg.moveTo(outerX, outerY);
			ctxBkg.lineTo(innerX, innerY);
			ctxBkg.stroke();
		}
	});

	updateRings();
	setInterval(updateRings, 1000);

	function updateRings() {
		currentDate = new Date();
		const currentSeconds = currentDate.getSeconds();
		const currentMinutes = currentDate.getMinutes();
		const currentHours = currentDate.getHours();
		const currentDayOfWeek = getNumericWeekday(currentDate);
		const currentDayOfMonth = currentDate.getDate();
		const currentDayOfYear = getNumericYearDay(currentDate);
		currentMonth = currentDate.getMonth() + 1; // Get current month (0-11)
		daysInCurrentMonth = daysInMonth(currentMonth, currentDate.getFullYear());

		drawRings(
			currentSeconds,
			currentMinutes,
			currentHours,
			currentDayOfWeek,
			currentDayOfMonth,
			currentMonth,
			currentDayOfYear,
			daysInCurrentMonth
		);
	}

	// TODO: Parameter für Wochenstart ergänzen
	function getNumericWeekday(date) {
		const weekday = date.getDay(); // 0 (Sunday) to 6 (Saturday)
		return (weekday === 0) ? 7 : weekday;
	}

	function getNumericYearDay(date) {
		const start = new Date(date.getFullYear(), 0, 0);
		return Math.floor((date - start) / 86400000);
	}

	function daysInMonth(month, year) {
		return new Date(year, month, 0).getDate();
	}

	function drawArc(value, maxValue, radius, strokeStyle) {
		const startAngle = -0.5 * Math.PI; // Start at the top
		const endAngle = startAngle + (2 * Math.PI * (value / maxValue));

		ctxRings.lineWidth = 16;
		ctxRings.strokeStyle = strokeStyle;
		ctxRings.beginPath();
		ctxRings.arc(centerX, centerY, radius, startAngle, endAngle, false);
		ctxRings.stroke();
	}

	// TODO: Array rings nutzen
	function drawRings(seconds, minutes, hours, dayOfWeek, dayOfMonth, month, dayOfYear, daysInCurrentMonth) {
		ctxRings.clearRect(0, 0, canvasRings.width, canvasRings.height);

		drawArc(
			(seconds === 0) ? 60 : seconds,
			60,
			rings[0].radius,
			rings[0].color
		);
		drawArc(
			(minutes === 0) ? 60 : minutes,
			60,
			rings[1].radius,
			rings[1].color
		);
		drawArc(
			is24HourFormat ? hours : hours % 12,
			is24HourFormat ? 24 : 12,
			rings[2].radius,
			rings[2].color
		);
		drawArc(dayOfWeek, 7, rings[3].radius, rings[3].color);
		drawArc(dayOfMonth, daysInCurrentMonth, rings[4].radius, rings[4].color);
		drawArc(dayOfYear, 365, rings[5].radius, rings[5].color);
		drawArc(month, 12, rings[6].radius, rings[6].color);
	}
</script>
{% endblock %}