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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,4 +1,5 @@ | ||
| import {Chart, registerables} from 'https://cdn.jsdelivr.net/npm/[email protected]/+esm' | ||
| import Color from "https://colorjs.io/dist/color.js"; | ||
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| Chart.register(...registerables); | ||
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@@ -21,6 +22,46 @@ const getOrCreateLegendList = (chart, id) => { | |
| return listContainer; | ||
| }; | ||
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| /** | ||
| * Returns a hash code from a string | ||
| * @param {String} str The string to hash. | ||
| * @return {Number} A 32bit integer | ||
| * @see http://werxltd.com/wp/2010/05/13/javascript-implementation-of-javas-string-hashcode-method/ | ||
| */ | ||
| function hashCode(str) { | ||
| let hash = 0; | ||
| for (let i = 0, len = str.length; i < len; i++) { | ||
| let chr = str.charCodeAt(i); | ||
| hash = (hash << 5) - hash + chr; | ||
| hash |= 0; // Convert to 32bit integer | ||
| } | ||
| return hash; | ||
| } | ||
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| const getColor = (context) => { | ||
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| const colors = [ | ||
| "#37a2eb", | ||
| "#ff6384", | ||
| "#ff9e40", | ||
| "#9966ff", | ||
| "#ffcd56", | ||
| "#4dbd74" | ||
| ] | ||
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| let hash = hashCode(context) ** 2 // Make sure its positive | ||
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| let color = colors[hash % (colors.length - 1)] | ||
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| let colorObj = new Color(color).to("lch"); | ||
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| // Manipulate the color based on the hash | ||
| colorObj = colorObj.lighten((hash % 19) / 100) | ||
| colorObj = colorObj.darken((hash % 23) / 100) | ||
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| return colorObj.to("srgb").toString(); | ||
| } | ||
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| const htmlLegendPlugin = { | ||
| id: 'htmlLegend', | ||
| afterUpdate(chart, args, options) { | ||
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@@ -118,14 +159,14 @@ export class PieChart { | |
| parent.className = 'row gx-0'; | ||
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| this.canvasContainer = document.createElement('div'); | ||
| this.canvasContainer.className = "col-md-8 col-12" | ||
| this.canvasContainer.className = "col-8" | ||
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| this.canvas = document.createElement('canvas'); | ||
| this.canvas.id = `canvas-${this.id}`; | ||
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| this.legend = document.createElement('div'); | ||
| this.legend.id = `legend-${this.id}`; | ||
| this.legend.className = "col-md-4 col-12" | ||
| this.legend.className = "col-4" | ||
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| // Empty the children out of the parent element | ||
| while (parent.firstChild) { | ||
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@@ -145,7 +186,8 @@ export class PieChart { | |
| datasets: [{ | ||
| label: this.label, | ||
| data: this.data['data'], | ||
| borderWidth: 1 | ||
| borderWidth: 1, | ||
| backgroundColor: this.data['labels'].map(getColor), | ||
| }] | ||
| }, | ||
| options: { | ||
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