billboard.js
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Re-usable easy interface JavaScript chart library, based on D3 v4+
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text/typescript
/**
* Copyright (c) 2017 ~ present NAVER Corp.
* billboard.js project is licensed under the MIT license
*/
/**
* polar config options
*/
export default {
/**
* Set polar options
* @name polar
* @memberof Options
* @type {object}
* @property {object} polar Polar object
* @property {boolean} [polar.label.show=true] Show or hide label on each polar piece.
* @property {Function} [polar.label.format] Set formatter for the label on each polar piece.
* @property {number} [polar.label.threshold=0.05] Set threshold ratio to show/hide labels.
* @property {number|Function} [polar.label.ratio=undefined] Set ratio of labels position.
* @property {object|Function} [polar.label.image] Set image to be displayed next to the label text.<br><br>
* When function is specified, will receives 3 arguments such as `v, id, i` and it must return an image object with `url`, `width`, `height`, and optional `pos` properties.<br><br>
* The arguments are:<br>
* - `v` is the value of the data point where the label is shown.
* - `id` is the id of the data where the label is shown.
* - `i` is the index of the data series point where the label is shown.
* @property {string} polar.label.image.url Image URL path. Can use placeholder `{=ID}` which will be replaced with the data ID.
* @property {number} polar.label.image.width Image width in pixels.
* @property {number} polar.label.image.height Image height in pixels.
* @property {object} [polar.label.image.pos] Image position relative to the label text.
* @property {number} [polar.label.image.pos.x=0] x coordinate position, relative the original.
* @property {number} [polar.label.image.pos.y=0] y coordinate position, relative the original.
* @property {number} [polar.level.depth=3] Set the level depth.
* @property {boolean} [polar.level.show=true] Show or hide level.
* @property {string} [polar.level.text.backgroundColor="#fff"] Set label text's background color.
* @property {Function} [polar.level.text.format] Set format function for the level value.<br>- Default value: `(x) => x % 1 === 0 ? x : x.toFixed(2)`
* @property {boolean} [polar.level.text.show=true] Show or hide level text.
* @property {number} [polar.padAngle=0] Set padding between data.
* @property {number} [polar.padding=0] Sets the gap between pie arcs.
* @property {number} [polar.startingAngle=0] Set starting angle where data draws.
* @see [Demo](https://naver.github.io/billboard.js/demo/#Chart.PolarChart)
* @see [Demo: label image](https://naver.github.io/billboard.js/demo/#PolarChartOptions.LabelImage)
* @example
* polar: {
* label: {
* show: false,
* format: function(value, ratio, id) {
* return d3.format("$")(value);
*
* // to multiline, return with '\n' character
* // return value +"%\nLine1\n2Line2";
* },
*
* // 0.1(10%) ratio value means, the minimum ratio to show text label relative to the total value.
* // if data value is below than 0.1, text label will be hidden.
* threshold: 0.1,
*
* // set ratio callback. Should return ratio value
* ratio: function(d, radius, h) {
* ...
* return ratio;
* },
* // or set ratio number
* ratio: 0.5,
*
* // set image to be displayed next to the label text
* image: {
* url: "./sample.svg",
*
* // use placeholder to dynamically set image URL based on data ID
* url: "./images/{=ID}.svg", // will be replaced to "./images/data1.svg", "./images/data2.svg", etc.
* width: 35,
* height: 35,
* pos: {
* x: 0,
* y: 0
* }
* },
*
* // or use function to return image configuration dynamically
* image: function(v, id, i) {
* // Return different images based on value
* if (v > 500) {
* return {
* url: "./high-value.svg",
* width: 40,
* height: 40,
* pos: { x: 0, y: 0 }
* };
* } else if (v > 100) {
* return {
* url: "./medium-value.svg",
* width: 30,
* height: 30,
* pos: { x: 0, y: 0 }
* };
* } else if(v < 5) {
* // Return falsy value in case of don't want to show image
* return null;
* } else {
* return {
* url: "./low-value.svg",
* width: 20,
* height: 20,
* pos: { x: 0, y: 0 }
* };
* }
* }
* },
* level: {
* depth: 3,
* max: 500,
* show: true,
* text: {
* format: function(x) {
* return x + "%";
* },
* show: true,
* backgroundColor: "red"
* }
* },
* padAngle: 0.1,
* padding: 0,
* startingAngle: 1
* }
*/
polar_label_show: true,
polar_label_format: <(() => number | string) | undefined>undefined,
polar_label_threshold: 0.05,
polar_label_image: <
| {url: string, width: number, height: number, pos?: {x?: number, y?: number}}
| ((v: number, id: string, i: number) => {
url: string,
width: number,
height: number,
pos?: {x?: number, y?: number}
} | null)
| undefined
>undefined,
polar_label_ratio: <(() => number) | undefined>undefined,
polar_level_depth: 3,
polar_level_max: <number | undefined>undefined,
polar_level_show: true,
polar_level_text_backgroundColor: "#fff",
polar_level_text_format: (x: number) => (x % 1 === 0 ? x : x.toFixed(2)),
polar_level_text_show: true,
polar_padAngle: 0,
polar_padding: 0,
polar_startingAngle: 0
};