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| 1 <!-- | |
| 2 @license | |
| 3 Copyright (c) 2015 The Polymer Project Authors. All rights reserved. | |
| 4 This code may only be used under the BSD style license found at http://polymer.g
ithub.io/LICENSE.txt | |
| 5 The complete set of authors may be found at http://polymer.github.io/AUTHORS.txt | |
| 6 The complete set of contributors may be found at http://polymer.github.io/CONTRI
BUTORS.txt | |
| 7 Code distributed by Google as part of the polymer project is also | |
| 8 subject to an additional IP rights grant found at http://polymer.github.io/PATEN
TS.txt | |
| 9 --> | |
| 10 | |
| 11 <link rel="import" href="../polymer/polymer.html"> | |
| 12 | |
| 13 <script> | |
| 14 | |
| 15 /** | |
| 16 * `iron-range-behavior` provides the behavior for something with a minimum to m
aximum range. | |
| 17 * | |
| 18 * @demo demo/index.html | |
| 19 * @polymerBehavior | |
| 20 */ | |
| 21 Polymer.IronRangeBehavior = { | |
| 22 | |
| 23 properties: { | |
| 24 | |
| 25 /** | |
| 26 * The number that represents the current value. | |
| 27 */ | |
| 28 value: { | |
| 29 type: Number, | |
| 30 value: 0, | |
| 31 notify: true, | |
| 32 reflectToAttribute: true | |
| 33 }, | |
| 34 | |
| 35 /** | |
| 36 * The number that indicates the minimum value of the range. | |
| 37 */ | |
| 38 min: { | |
| 39 type: Number, | |
| 40 value: 0, | |
| 41 notify: true | |
| 42 }, | |
| 43 | |
| 44 /** | |
| 45 * The number that indicates the maximum value of the range. | |
| 46 */ | |
| 47 max: { | |
| 48 type: Number, | |
| 49 value: 100, | |
| 50 notify: true | |
| 51 }, | |
| 52 | |
| 53 /** | |
| 54 * Specifies the value granularity of the range's value. | |
| 55 */ | |
| 56 step: { | |
| 57 type: Number, | |
| 58 value: 1, | |
| 59 notify: true | |
| 60 }, | |
| 61 | |
| 62 /** | |
| 63 * Returns the ratio of the value. | |
| 64 */ | |
| 65 ratio: { | |
| 66 type: Number, | |
| 67 value: 0, | |
| 68 readOnly: true, | |
| 69 notify: true | |
| 70 }, | |
| 71 }, | |
| 72 | |
| 73 observers: [ | |
| 74 '_update(value, min, max, step)' | |
| 75 ], | |
| 76 | |
| 77 _calcRatio: function(value) { | |
| 78 return (this._clampValue(value) - this.min) / (this.max - this.min); | |
| 79 }, | |
| 80 | |
| 81 _clampValue: function(value) { | |
| 82 return Math.min(this.max, Math.max(this.min, this._calcStep(value))); | |
| 83 }, | |
| 84 | |
| 85 _calcStep: function(value) { | |
| 86 /** | |
| 87 * if we calculate the step using | |
| 88 * `Math.round(value / step) * step` we may hit a precision point issue | |
| 89 * eg. 0.1 * 0.2 = 0.020000000000000004 | |
| 90 * http://docs.oracle.com/cd/E19957-01/806-3568/ncg_goldberg.html | |
| 91 * | |
| 92 * as a work around we can divide by the reciprocal of `step` | |
| 93 */ | |
| 94 return this.step ? (Math.round(value / this.step) / (1 / this.step)) : value
; | |
| 95 }, | |
| 96 | |
| 97 _validateValue: function() { | |
| 98 var v = this._clampValue(this.value); | |
| 99 this.value = this.oldValue = isNaN(v) ? this.oldValue : v; | |
| 100 return this.value !== v; | |
| 101 }, | |
| 102 | |
| 103 _update: function() { | |
| 104 this._validateValue(); | |
| 105 this._setRatio(this._calcRatio(this.value) * 100); | |
| 106 } | |
| 107 | |
| 108 }; | |
| 109 </script> | |
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Chromium Code Reviews
Issue 1269803005:
Remove third_party/polymer from .gitignore (Closed)
Base URL: https://chromium.googlesource.com/chromium/src.git@master