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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/elements/sky-element.sky" /> | |
| 7 | |
| 8 <sky-element attributes="change:number"> | |
| 9 <template> | |
| 10 <style> | |
| 11 :host { | |
| 12 width: 40px; | |
| 13 height: 40px; | |
| 14 display: flex; | |
| 15 align-items: center; | |
| 16 justify-content: center; | |
| 17 border-radius: 40px; | |
| 18 border: 1px solid transparent; | |
| 19 } | |
| 20 #arrow { | |
| 21 width: 0; | |
| 22 height: 0; | |
| 23 border-left: 9px solid transparent; | |
| 24 border-right: 9px solid transparent; | |
| 25 } | |
| 26 .up { | |
| 27 margin-bottom: 3px; | |
| 28 border-bottom: 9px solid white; | |
| 29 } | |
| 30 .down { | |
| 31 margin-top: 3px; | |
| 32 border-top: 9px solid white; | |
| 33 } | |
| 34 </style> | |
| 35 <div id="arrow" /> | |
| 36 </template> | |
| 37 <script> | |
| 38 import "dart:sky"; | |
| 39 import "dart:math"; | |
| 40 | |
| 41 final List<String> _kRedColors = [ | |
| 42 '#E57373', | |
| 43 '#EF5350', | |
| 44 '#F44336', | |
| 45 '#E53935', | |
| 46 '#D32F2F', | |
| 47 '#C62828', | |
| 48 '#B71C1C', | |
| 49 ]; | |
| 50 | |
| 51 final List<String> _kGreenColors = [ | |
| 52 '#81C784', | |
| 53 '#66BB6A', | |
| 54 '#4CAF50', | |
| 55 '#43A047', | |
| 56 '#388E3C', | |
| 57 '#2E7D32', | |
| 58 '#1B5E20', | |
| 59 ]; | |
| 60 | |
| 61 int _colorIndexForPercentChange(double percentChange) { | |
| 62 // Currently the max is 10%. | |
| 63 double maxPercent = 10.0; | |
| 64 return max(0, ((percentChange.abs() / maxPercent) * _kGreenColors.length).floo
r()); | |
| 65 } | |
| 66 | |
| 67 String _colorForPercentChange(double percentChange) { | |
| 68 if (percentChange > 0) | |
| 69 return _kGreenColors[_colorIndexForPercentChange(percentChange)]; | |
| 70 return _kRedColors[_colorIndexForPercentChange(percentChange)]; | |
| 71 } | |
| 72 | |
| 73 @Tagname('stock-arrow') | |
| 74 class StockArrow extends SkyElement { | |
| 75 Element _arrow; | |
| 76 | |
| 77 void _updateArrow(double percentChange) { | |
| 78 String border = _colorForPercentChange(percentChange).toString(); | |
| 79 String type = percentChange > 0 ? 'bottom' : 'top'; | |
| 80 _arrow.style['border-$type-color'] = border; | |
| 81 style['border-color'] = border; | |
| 82 _arrow.setAttribute('class', percentChange > 0 ? 'up' : 'down'); | |
| 83 } | |
| 84 | |
| 85 void shadowRootReady() { | |
| 86 _arrow = shadowRoot.getElementById('arrow'); | |
| 87 _updateArrow(change); | |
| 88 } | |
| 89 | |
| 90 void changeChanged(double oldValue, double newValue) { | |
| 91 if (_arrow != null) | |
| 92 _updateArrow(newValue); | |
| 93 } | |
| 94 } | |
| 95 | |
| 96 _init(script) => register(script, StockArrow); | |
| 97 </script> | |
| 98 </sky-element> | |
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Chromium Code Reviews
Issue 1022613002:
Remove custom elements examples, they are no longer maintained (Closed)
Base URL: git@github.com:domokit/mojo.git@master