/**
* Copyright (c) 2017 ~ present NAVER Corp.
* billboard.js project is licensed under the MIT license
*/
/**
* gauge config options
*/
export default {
/**
* Set gauge options
* @name gauge
* @memberof Options
* @type {object}
* @property {object} gauge Gauge object
* @property {boolean} [gauge.background=""] Set background color. (The `.bb-chart-arcs-background` element)
* @property {boolean} [gauge.fullCircle=false] Show full circle as donut. When set to 'true', the max label will not be showed due to start and end points are same location.
* @property {boolean} [gauge.label.show=true] Show or hide label on gauge.
* @property {Function} [gauge.label.extents] Set customized min/max label text.
* @property {Function} [gauge.label.format] Set formatter for the label on gauge. Label text can be multilined with `\n` character.<br>
* Will pass following arguments to the given function:
* - value {number}: absolute value
* - ratio {number}: value's ratio
* - id {string}: data's id value
* @property {number|Function} [gauge.label.ratio=undefined] Set ratio of labels position.
* @property {number} [gauge.label.threshold=0] Set threshold ratio to show/hide labels.
* @property {boolean} [gauge.expand=true] Enable or disable expanding gauge.
* @property {number} [gauge.expand.rate=0.98] Set expand rate.
* @property {number} [gauge.expand.duration=50] Set the expand transition time in milliseconds.
* @property {boolean} [gauge.enforceMinMax=false] Enforce to given min/max value.
* - When `gauge.min=50` and given value is `30`, gauge will render as empty value.
* - When `gauge.max=100` and given value is `120`, gauge will render till 100, not surpassing max value.
* @property {number} [gauge.min=0] Set min value of the gauge.
* @property {number} [gauge.max=100] Set max value of the gauge.
* @property {number} [gauge.startingAngle=-1 * Math.PI / 2] Set starting angle where data draws.
*
* **Limitations:**
* - when `gauge.fullCircle=false`:
* - -1 * Math.PI / 2 <= startingAngle <= Math.PI / 2
* - `startingAngle <= -1 * Math.PI / 2` defaults to `-1 * Math.PI / 2`
* - `startingAngle >= Math.PI / 2` defaults to `Math.PI / 2`
* - when `gauge.fullCircle=true`:
* - -1 * Math.PI < startingAngle < Math.PI
* - `startingAngle < -1 * Math.PI` defaults to `Math.PI`
* - `startingAngle > Math.PI` defaults to `Math.PI`
* @property {number} [gauge.arcLength=100] Set the length of the arc to be drawn in percent from -100 to 100.<br>
* Negative value will draw the arc **counterclockwise**. Need to be used in conjunction with `gauge.fullCircle=true`.
*
* **Limitations:**
* - -100 <= arcLength (in percent) <= 100
* - 'arcLength < -100' defaults to -100
* - 'arcLength > 100' defaults to 100
* @property {string} [gauge.title=""] Set title of gauge chart. Use `\n` character for line break.
* - **NOTE:**
* - When `arc.needle.show=true` is set, special template `{=NEEDLE_VALUE}` can be used inside the title text to show current needle value.
* @property {string} [gauge.units] Set units of the gauge.
* @property {number} [gauge.width] Set width of gauge chart.
* @property {string} [gauge.type="single"] Set type of gauge to be displayed.<br><br>
* **Available Values:**
* - single
* - multi
* @property {number} [gauge.arcs.minWidth=5] Set minimal width of gauge arcs until the innerRadius disappears.
* @see [Demo: enforceMinMax, min/max](https://naver.github.io/billboard.js/demo/#GaugeChartOptions.GaugeMinMax)
* @see [Demo: archLength](https://naver.github.io/billboard.js/demo/#GaugeChartOptions.GaugeArcLength)
* @see [Demo: startingAngle](https://naver.github.io/billboard.js/demo/#GaugeChartOptions.GaugeStartingAngle)
* @see [Demo: labelRatio](https://naver.github.io/billboard.js/demo/#GaugeChartOptions.GaugeLabelRatio)
* @example
* gauge: {
* background: "#eee", // will set 'fill' css prop for '.bb-chart-arcs-background' classed element.
* fullCircle: false,
* label: {
* show: false,
* format: function(value, ratio, id) {
* return value;
*
* // to multiline, return with '\n' character
* // return value +"%\nLine1\n2Line2";
* },
*
* extents: function(value, isMax) {
* return (isMax ? "Max:" : "Min:") + value;
* },
*
* // 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
* },
*
* // disable expand transition for interaction
* expand: false,
*
* expand: {
* // set duration of expand transition to 500ms.
* duration: 500,
*
* // set expand area rate
* rate: 1
* },
*
* // enforce min/max value.
* // when given value < min, will render as empty value.
* // when value > max, will render to given max value not surpassing it.
* enforceMinMax: true,
*
* min: -100,
* max: 200,
* type: "single" // or 'multi'
* title: "Title Text",
*
* // when 'arc.needle.show=true' is set, can show current needle value.
* title: "Needle value:\n{=NEEDLE_VALUE}",
*
* units: "%",
* width: 10,
* startingAngle: -1 * Math.PI / 2,
* arcLength: 100,
* arcs: {
* minWidth: 5
* }
* }
*/
gauge_background: "",
gauge_fullCircle: false,
gauge_label_show: true,
gauge_label_extents: <(() => string)|undefined> undefined,
gauge_label_format: <(() => string)|undefined> undefined,
gauge_label_ratio: <(() => number)|undefined> undefined,
gauge_label_threshold: 0,
gauge_enforceMinMax: false,
gauge_min: 0,
gauge_max: 100,
gauge_type: "single",
gauge_startingAngle: -1 * Math.PI / 2,
gauge_arcLength: 100,
gauge_title: "",
gauge_units: <string|undefined> undefined,
gauge_width: <number|undefined> undefined,
gauge_arcs_minWidth: 5,
gauge_expand: <boolean|{duration: number}> {},
gauge_expand_rate: 0.98,
gauge_expand_duration: 50
};