134 lines
4.1 KiB
HTML
134 lines
4.1 KiB
HTML
<!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='../iwmlib/lib/3rdparty/highlight/styles/default.css'>
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<link rel='stylesheet' href='../iwmlib/lib/../css/doctest.css'>
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<script src='../iwmlib/lib/3rdparty/highlight/highlight.pack.js'></script>
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<script src='../iwmlib/lib/3rdparty/all.js'></script>
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<script src='../iwmlib/lib/all.js'></script>
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<script src='../iwmlib/lib/pixi/all.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>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 of relevance for
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other objects, then this event should be sent out to all objects, that are interested in that event. Objects interested
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in that event, subscribe the event handler and get notified via a callback 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() { result.push("a") }
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function b() { result.push("b") }
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function c() { result.push("c") }
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function d() { result.push("d") }
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function e() { result.push("e") }
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function f() { result.push("f") }
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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 id="positionOnElementBox" class="box" style="width: 512px;height:256px;border: 1px solid black; box-sizing: border-box; transform: rotate(30deg); margin:100px;"></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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})
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})
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</script>
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</body>
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</html> |