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| 1 <!-- | |
| 2 // Copyright 2015 The Chromium Authors. All rights reserved. | |
| 3 // Use of this source code is governed by a BSD-style license that can be | |
| 4 // found in the LICENSE file. | |
| 5 --> | |
| 6 <import src="/sky/framework/sky-element/sky-element.sky" as="SkyElement" /> | |
| 7 | |
| 8 <sky-element name="color-wheel" | |
| 9 attributes="color:string" | |
| 10 on-pointerdown="handlePointerDown"> | |
| 11 <template> | |
| 12 <style> | |
| 13 img { | |
| 14 min-width: 100%; | |
| 15 height: auto; | |
| 16 } | |
| 17 </style> | |
| 18 <img class="color-wheel-img" src="color-wheel.png"> | |
| 19 </template> | |
| 20 <script> | |
| 21 function hsvToRgb(h, s, v) { | |
| 22 var i = Math.floor(h * 6); | |
| 23 var f = h * 6 - i; | |
| 24 var p = v * (1 - s); | |
| 25 var q = v * (1 - f * s); | |
| 26 var t = v * (1 - (1 - f) * s); | |
| 27 var r, g, b; | |
| 28 switch (i % 6) { | |
| 29 case 0: r = v, g = t, b = p; break; | |
| 30 case 1: r = q, g = v, b = p; break; | |
| 31 case 2: r = p, g = v, b = t; break; | |
| 32 case 3: r = p, g = q, b = v; break; | |
| 33 case 4: r = t, g = p, b = v; break; | |
| 34 case 5: r = v, g = p, b = q; break; | |
| 35 } | |
| 36 return { | |
| 37 r: Math.floor(r * 255), | |
| 38 g: Math.floor(g * 255), | |
| 39 b: Math.floor(b * 255) | |
| 40 }; | |
| 41 } | |
| 42 | |
| 43 function xyToRgb(x, y, radius) { | |
| 44 var rx = x - radius; | |
| 45 var ry = y - radius; | |
| 46 var d = radius * radius; | |
| 47 if (rx * rx + ry * ry > d) | |
| 48 return undefined; | |
| 49 var h = (Math.atan2(ry, rx) + Math.PI) / (2 * Math.PI); | |
| 50 var s = Math.sqrt(d) / radius; | |
| 51 return hsvToRgb(h, s, 1); | |
| 52 } | |
| 53 | |
| 54 function toHexString(n) { | |
| 55 var s = Number(n).toString(16).toUpperCase(); | |
| 56 return (s.length == 1) ? "0" + s : s; | |
| 57 } | |
| 58 | |
| 59 function rgbToString(rgb) { | |
| 60 return "#" + toHexString(rgb.r) + toHexString(rgb.g) + toHexString(rgb.b); | |
| 61 } | |
| 62 | |
| 63 module.exports = class extends SkyElement { | |
| 64 created() { | |
| 65 super.created(); | |
| 66 this.color = "#xFF00FF"; | |
| 67 this.colorChanged = function() { | |
| 68 this.dispatchEvent(new CustomEvent('color-change', { | |
| 69 bubbles: true, | |
| 70 detail: this.color, | |
| 71 })); | |
| 72 }; | |
| 73 } | |
| 74 updateColor(event) { | |
| 75 var bounds = event.target.getBoundingClientRect(); | |
| 76 var x = event.x - bounds.left; | |
| 77 var y = event.y - bounds.top; | |
| 78 var radius = Math.min(bounds.width, bounds.height) / 2.0; | |
| 79 var rgb = xyToRgb(x, y, radius); | |
| 80 if (rgb) | |
| 81 this.color = rgbToString(rgb); | |
| 82 } | |
| 83 handlePointerDown(event) { | |
| 84 this.updateColor(event); | |
| 85 } | |
| 86 }.register(); | |
| 87 </script> | |
| 88 </sky-element> | |
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Chromium Code Reviews
Issue 987443002:
Remove some more Sky examples that don't run (Closed)
Base URL: git@github.com:domokit/mojo.git@master