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| 1 |
| 2 |
| 3 Polymer('core-range', { |
| 4 |
| 5 /** |
| 6 * The number that represents the current value. |
| 7 * |
| 8 * @attribute value |
| 9 * @type number |
| 10 * @default 0 |
| 11 */ |
| 12 value: 0, |
| 13 |
| 14 /** |
| 15 * The number that indicates the minimum value of the range. |
| 16 * |
| 17 * @attribute min |
| 18 * @type number |
| 19 * @default 0 |
| 20 */ |
| 21 min: 0, |
| 22 |
| 23 /** |
| 24 * The number that indicates the maximum value of the range. |
| 25 * |
| 26 * @attribute max |
| 27 * @type number |
| 28 * @default 100 |
| 29 */ |
| 30 max: 100, |
| 31 |
| 32 /** |
| 33 * Specifies the value granularity of the range's value. |
| 34 * |
| 35 * @attribute step |
| 36 * @type number |
| 37 * @default 1 |
| 38 */ |
| 39 step: 1, |
| 40 |
| 41 /** |
| 42 * Returns the ratio of the value. |
| 43 * |
| 44 * @attribute ratio |
| 45 * @type number |
| 46 * @default 0 |
| 47 */ |
| 48 ratio: 0, |
| 49 |
| 50 observe: { |
| 51 'value min max step': 'update' |
| 52 }, |
| 53 |
| 54 calcRatio: function(value) { |
| 55 return (this.clampValue(value) - this.min) / (this.max - this.min); |
| 56 }, |
| 57 |
| 58 clampValue: function(value) { |
| 59 return Math.min(this.max, Math.max(this.min, this.calcStep(value))); |
| 60 }, |
| 61 |
| 62 calcStep: function(value) { |
| 63 return this.step ? (Math.round(value / this.step) / (1 / this.step)) : val
ue; |
| 64 }, |
| 65 |
| 66 validateValue: function() { |
| 67 var v = this.clampValue(this.value); |
| 68 this.value = this.oldValue = isNaN(v) ? this.oldValue : v; |
| 69 return this.value !== v; |
| 70 }, |
| 71 |
| 72 update: function() { |
| 73 this.validateValue(); |
| 74 this.ratio = this.calcRatio(this.value) * 100; |
| 75 } |
| 76 |
| 77 }); |
| 78 |
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