2023-05-09 13:25:39 +02:00
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<!DOCTYPE html>
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<html lang="en">
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<head>
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<meta charset="UTF-8" />
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<title>Utils</title>
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<link rel="stylesheet" href="../../../lib/3rdparty/highlight/styles/default.css" />
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<link rel="stylesheet" href="../../../css/doctest.css" />
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<script src="../../../lib/3rdparty/highlight/highlight.pack.js"></script>
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<script src="../../../dist/iwmlib.3rdparty.js"></script>
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<script src="../../../dist/iwmlib.js"></script>
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<script src="../../../dist/iwmlib.pixi.js"></script>
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<script src="all.js"></script>
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<style>
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body {
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position: relative;
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}
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</style>
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</head>
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<body onload="Doctest.run()">
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<h1><a href="../../index.html">lib.</a><a href="../index.html">pixi.</a><a href="index.html">maps.</a>Utils</h1>
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<p>Some utility functionalities for the Tuesch.</p>
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<h2>Event Handler</h2>
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<p>
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The event handler class generalizes a common design principle in javascript. When an event occurs, that is
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of relevance for other objects, then this event should be sent out to all objects, that are interested in
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that event. Objects interested in that event, subscribe the event handler and get notified via a callback
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function.
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</p>
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<script class="doctest">
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let result = []
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function a() {
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result.push('a')
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}
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function b() {
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result.push('b')
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}
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function c() {
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result.push('c')
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}
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function d() {
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result.push('d')
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}
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function e() {
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result.push('e')
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}
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function f() {
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result.push('f')
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}
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//Init and call.
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let eventHandler = new EventHandler('manual', { listeners: [a, b] })
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eventHandler.call()
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Doctest.expect(result.join(','), ['a', 'b'].join(','))
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result = []
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// Add single
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eventHandler.add(c)
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eventHandler.call()
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Doctest.expect(result.join(','), ['a', 'b', 'c'].join(','))
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result = []
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// Add multiple
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eventHandler.addMultiple(d, e, f)
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eventHandler.call()
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Doctest.expect(result.join(','), ['a', 'b', 'c', 'd', 'e', 'f'].join(','))
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result = []
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//Remove inbetween
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eventHandler.remove(c)
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eventHandler.call()
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Doctest.expect(result.join(','), ['a', 'b', 'd', 'e', 'f'].join(','))
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result = []
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// Remove first
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eventHandler.remove(a)
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eventHandler.call()
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Doctest.expect(result.join(','), ['b', 'd', 'e', 'f'].join(','))
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result = []
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// Remove all remaining elements.
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eventHandler.empty()
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eventHandler.call()
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Doctest.expect(result.join(','), [].join(','))
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result = []
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</script>
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<h2>DomUtils</h2>
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Utility functions that help handling the DOM.
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<h3>positionOnElement(element, position)</h3>
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Function that returns the global position for a normalized position.
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<div
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id="positionOnElementBox"
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class="box"
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style="
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width: 512px;
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height: 256px;
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border: 1px solid black;
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box-sizing: border-box;
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transform: rotate(30deg);
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margin: 100px;
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"
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></div>
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<script class="doctest">
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let target = document.getElementById('positionOnElementBox')
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window.addEventListener('load', () => {
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let positions = [
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[0, 0],
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[0, 1],
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[1, 0],
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[0.5, 0.5],
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[0.2, 0.2],
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[0.2, 0.8],
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[0.8, 0.2],
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[0.8, 0.8]
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]
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positions.forEach((position) => {
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position = { x: position[0], y: position[1] }
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let transformedPosition = DomUtils.positionOnElement(target, position)
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let dot = document.createElement('div')
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const size = 10
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Object.assign(dot.style, {
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width: size + 'px',
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height: size + 'px',
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top: target.offsetTop + target.offsetHeight / 2 + transformedPosition.y - size / 2 + 'px',
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left: target.offsetLeft + target.offsetWidth / 2 + transformedPosition.x - size / 2 + 'px',
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position: 'absolute',
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backgroundColor: 'green',
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borderRadius: '50%'
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})
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document.body.appendChild(dot)
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2019-11-04 10:59:08 +01:00
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})
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})
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2023-05-09 13:25:39 +02:00
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</script>
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</body>
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</html>
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