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" title="Toggle hour display">12-Stunden</button>
	<button id="tglSections" title="Toggle sections">Abschnitte</button>
</header>
<main></main>
{% endblock %}

{% block script %}
<script>
	// TODO: Kalenderwoche ergänzen
	// TODO: Mondphase ergänzen
	class HippieClock {
		constructor(element, date, options) {
			this.element = element;
			this.date = this.getTime(date);
			this.options = options || {
				size: Math.floor(this.getSize().value * 0.9),
				h24: true,
				sections: true
			};
			this.parts = this.createContext(['bkg', 'hands']);
			this.shapes = [];

			this.init();
		}

		init() {
			this.addRing('seconds', 1, 21, 60, `rgb(250, 216, 3)`);
			this.addRing('minutes', .9, 46, 60, `rgb(242, 175, 19)`);
			this.addRing('minutes', .8, 6, this.options.h24 ? 24 : 12, `rgb(211, 10, 81)`);
			this.addRing('dotweek', .7, 32, 7, `rgb(142, 31, 104)`);
			this.addRing('dotmonth', .6, 12, this.getTime().daysMonth, `rgb(39, 63, 139)`);
			this.addRing('dotyear', .5, 256, 365, `rgb(60, 87, 154)`);
			this.addRing('month', .4, 10, 12, `rgb(183, 224, 240)`);

			this.resize();
			window.addEventListener('resize', () => this.resize());

			console.debug(this);
		}

		resize() {
			this.parts.forEach(part => {
				part.element.width = part.element.offsetWidth;
				part.element.height = part.element.offsetHeight;
				this.draw();
			});
		}

		draw() {
			// TODO: Nur geänderte Teile löschen
			this.parts.forEach(part => {
				part.context.clearRect(0, 0, part.element.width, part.element.height);
			});

			let ctx = undefined;

			this.shapes
				.filter(item => item.type === 'circle')
				.forEach((shape) => {
					const radius = this.toPixelSize(shape.radius) / 2;
					ctx = this.parts[0].context;

					ctx.fillStyle = shape.color;
					ctx.beginPath();
					ctx.arc(
						this.toPixelX(shape.center),
						this.toPixelY(shape.center),
						radius,
						0,
						Math.PI * 2
					);
					ctx.fill();
				});

			this.shapes
				.filter(item => item.type === 'ring')
				.forEach((shape) => {
					if (this.options.sections) {
						const outerRadius = this.toPixelSize(shape.radius) / 2;
						const innerRadius = this.toPixelSize(shape.radius) / 2 - shape.stroke;
						ctx = this.parts[0].context;

						for (let i = 0; i < shape.max; i++) {
							const angle = (i * (360 / shape.max) - 90) * (Math.PI / 180); // -90 to start at top
							const outerX = this.toPixelX(shape.center) + outerRadius * Math.cos(angle);
							const outerY = this.toPixelY(shape.center) + outerRadius * Math.sin(angle);
							const innerX = this.toPixelX(shape.center) + innerRadius * Math.cos(angle);
							const innerY = this.toPixelY(shape.center) + innerRadius * Math.sin(angle);

							ctx.strokeStyle = 'black';
							// TODO: Stärke an shape.max orientieren
							ctx.lineWidth = 1;
							ctx.beginPath();
							ctx.moveTo(outerX, outerY);
							ctx.lineTo(innerX, innerY);
							ctx.stroke();
						}
					}

					const radius = this.toPixelSize(shape.radius) / 2 - shape.stroke / 2;
					const start = -0.5 * Math.PI; // Start at the top
					const angle = start + (2 * Math.PI * (shape.angle / shape.max));
					ctx = this.parts[1].context;

					ctx.strokeStyle = shape.color;
					ctx.lineWidth = shape.stroke;
					ctx.beginPath();
					ctx.arc(
						this.toPixelX(shape.center),
						this.toPixelY(shape.center),
						radius,
						start,
						angle
					);
					ctx.stroke();
				});
		}

		update() {
			const second = this.getTime().second;
			const minute = this.getTime().minute;
			const hour = this.getTime().hour;

			this.updateShape('seconds', (second === 0) ? 60 : second);
			this.updateShape('minutes', (minute === 0) ? 60 : minute);
			this.updateShape('hours', this.options.h24 ? hour : hour % 12, this.options.h24 ? 24 : 12);
			this.updateShape('dotweek', this.getTime().dayWeek);
			this.updateShape('dotmonth', this.getTime().dayMonth, this.getTime().daysMonth);
			this.updateShape('dotyear', this.getTime().dayYear);
			this.updateShape('month', this.getTime().month);
			this.draw();
		}

		toPixelX(number) {
			return number * this.parts[0].element.width;
		}

		toPixelY(number) {
			return number * this.parts[0].element.height;
		}

		toPixelSize(number) {
			return number * Math.min(this.parts[0].element.width, this.parts[0].element.height);
		}

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

			return (weekday === 0) ? 7 : weekday;
		}

		getNumericYearDay(date) {
			const start = new Date(date.getFullYear(), 0, 0);

			return Math.floor((date - start) / 86400000);
		}

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

		getSize() {
			const height = window.innerHeight;
			const width = window.innerWidth;

			return {
				value: Math.min(height, width),
				smaller: height < width ? 'height' : 'width'
			};
		}

		getTime(date) {
			this.date = date || new Date();

			return {
				second: this.date.getSeconds(),
				minute: this.date.getMinutes(),
				hour: this.date.getHours(),
				dayWeek: this.getNumericWeekday(this.date),
				dayMonth: this.date.getDate(),
				dayYear: this.getNumericYearDay(this.date),
				month: this.date.getMonth() + 1, // Get current month (0-11)
				daysMonth: this.daysInMonth(this.date.getMonth() + 1, this.date.getFullYear())
			};
		}

		createContext(names) {
			let parts = [];
			const wrap = document.createElement('div');

			wrap.style.position = 'relative';
			wrap.style.height = this.options.size + 'px';
			wrap.style.width = this.options.size + 'px';

			names.forEach(name => {
				const canvas = document.createElement('canvas');

				canvas.style.position = 'absolute';
				canvas.style.top = '0px';
				canvas.style.left = '0px';
				canvas.style.height = '100%';
				canvas.style.width = '100%';
				canvas.height = canvas.offsetHeight;
				canvas.width = canvas.offsetWidth;

				wrap.appendChild(canvas);

				parts.push({name: name, element: canvas, context: canvas.getContext('2d')});
			});

			this.element.appendChild(wrap);

			return parts;
		}

		updateShape(id, angle, max) {
			const shape = this.shapes.find(s => s.id === id);

			if (shape) {
				shape.angle = angle;
				if (max) shape.max = max;
			}
		}

		updateOptions(changes) {
			this.options = {...this.options, ...changes};
		}

		addCircle(id, center, radius, color = `rgba(0, 0, 0, .1)`) {
			this.shapes.push({type: 'circle', id, center, radius, color});
		}

		addRing(id, radius, angle, max, color = 'black', center = .5, stroke = 16) {
			this.shapes.push({type: 'ring', id, radius, angle, max, color, center, stroke});
		}

		addSection(id, radius, color = 'black', center = .5, stroke = 1) {
			this.shapes.push({type: 'section', id, radius, color, center, stroke});
		}
	}

	const container = document.querySelector('#clock main');
	const clock = new HippieClock(container);

	clock.addCircle('base', .5, 1);
	clock.draw();

	setInterval(() => {
		clock.update();
	}, 1000);

	// TODO: Aktionen gehören quasi zu HippieClock
	document.getElementById('tglFormat').addEventListener('click', () => {
		if (clock) {
			clock.updateOptions({h24: !clock.options.h24})
			document.getElementById('tglFormat').textContent = clock.options.h24 ? '12-Stunden' : '24-Stunden';
		} else {
			console.log('No clock available');
		}
	});

	document.getElementById('tglSections').addEventListener('click', () => {
		if (clock) {
			clock.updateOptions({sections: !clock.options.sections})
		} else {
			console.log('No clock available');
		}
	});
</script>
{% endblock %}