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/* | ||
* The MIT License (MIT) | ||
* | ||
* Copyright (c) 2016-2017 The Regents of the University of California | ||
* | ||
* Permission is hereby granted, free of charge, to any person obtaining a copy of this software and | ||
* associated documentation files (the "Software"), to deal in the Software without restriction, including | ||
* without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell | ||
* copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the | ||
* following conditions: | ||
* | ||
* The above copyright notice and this permission notice shall be included in all copies or substantial | ||
* portions of the Software. | ||
* | ||
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING | ||
* BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND | ||
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY | ||
* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, | ||
* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN | ||
* THE SOFTWARE. | ||
* | ||
*/ | ||
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import {IGVMath} from "../../node_modules/igv-utils/src/index.js" | ||
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const defaultColorScaleConfig = {min: 0, max: 3000, color: "rgb(0,0,255)"} | ||
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class ShoeboxColorScale { | ||
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constructor(scale) { | ||
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scale = scale || defaultColorScaleConfig | ||
this.max = scale.max | ||
this.min = scale.min || 0 | ||
this.cache = [] | ||
this.nbins = 1000 | ||
this.binsize = (this.max - this.min) / this.nbins | ||
this.updateColor(scale.color || "rgb(0,0,255)") | ||
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} | ||
updateColor(color) { | ||
const comps = color.substring(4).replace(")", "").split(",") | ||
if (comps.length === 3) { | ||
this.r = Number.parseInt(comps[0].trim()) | ||
this.g = Number.parseInt(comps[1].trim()) | ||
this.b = Number.parseInt(comps[2].trim()) | ||
} | ||
} | ||
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setMinMax(min, max) { | ||
this.min = min | ||
this.max = max | ||
this.cache = [] | ||
this.binsize = (this.max - this.min) / this.nbins | ||
} | ||
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getColor(value) { | ||
const low = 0 | ||
if (value < this.min) return "white" | ||
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const bin = Math.floor((Math.min(this.max, value) - this.min) / this.binsize) | ||
if (undefined === this.cache[bin]) { | ||
const alpha = (IGVMath.clamp(value, low, this.max) - low) / (this.max - low) | ||
this.cache[bin] = `rgba(${this.r},${this.g},${this.b}, ${alpha})` | ||
} | ||
return this.cache[bin] | ||
} | ||
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stringify() { | ||
return "" + this.min + "," + this.max + ',' + `rgb(${this.r},${this.g},${this.b})` | ||
} | ||
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static parse(string) { | ||
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const tokens = str.split(",") | ||
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const cs = { | ||
min: Number.parseFloat(tokens[0]), | ||
max: Number.parseFloat(tokens[1]), | ||
color: tokens[2] | ||
} | ||
return new ShoeboxColorScale(cs) | ||
} | ||
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} | ||
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export default ShoeboxColorScale |
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