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Add borderDash options to arc element (#11127)
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‎docs/charts/doughnut.md‎

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@@ -105,6 +105,8 @@ The doughnut/pie chart allows a number of properties to be specified for each da
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| [`backgroundColor`](#styling) | [`Color`](../general/colors.md) | Yes | Yes | `'rgba(0, 0, 0, 0.1)'`
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| [`borderAlign`](#border-alignment) | `'center'`\|`'inner'` | Yes | Yes | `'center'`
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| [`borderColor`](#styling) | [`Color`](../general/colors.md) | Yes | Yes | `'#fff'`
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| [`borderDash`](#styling) | `number[]` | Yes | - | `[]`
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| [`borderDashOffset`](#styling) | `number` | Yes | - | `0.0`
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| [`borderJoinStyle`](#styling) | `'round'`\|`'bevel'`\|`'miter'` | Yes | Yes | `undefined`
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| [`borderRadius`](#border-radius) | `number`\|`object` | Yes | Yes | `0`
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| [`borderWidth`](#styling) | `number` | Yes | Yes | `2`
@@ -113,6 +115,8 @@ The doughnut/pie chart allows a number of properties to be specified for each da
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| [`data`](#data-structure) | `number[]` | - | - | **required**
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| [`hoverBackgroundColor`](#interactions) | [`Color`](../general/colors.md) | Yes | Yes | `undefined`
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| [`hoverBorderColor`](#interactions) | [`Color`](../general/colors.md) | Yes | Yes | `undefined`
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| [`hoverBorderDash`](#interactions) | `number[]` | Yes | - | `undefined`
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| [`hoverBorderDashOffset`](#interactions) | `number` | Yes | - | `undefined`
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| [`hoverBorderJoinStyle`](#interactions) | `'round'`\|`'bevel'`\|`'miter'` | Yes | Yes | `undefined`
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| [`hoverBorderWidth`](#interactions) | `number` | Yes | Yes | `undefined`
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| [`hoverOffset`](#interactions) | `number` | Yes | Yes | `0`
@@ -139,6 +143,8 @@ The style of each arc can be controlled with the following properties:
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| ---- | ----
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| `backgroundColor` | arc background color.
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| `borderColor` | arc border color.
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| `borderDash` | arc border length and spacing of dashes. See [MDN](https://developer.mozilla.org/en-US/docs/Web/API/CanvasRenderingContext2D/setLineDash).
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| `borderDashOffset` | arc border offset for line dashes. See [MDN](https://developer.mozilla.org/en-US/docs/Web/API/CanvasRenderingContext2D/lineDashOffset).
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| `borderJoinStyle` | arc border join style. See [MDN](https://developer.mozilla.org/en-US/docs/Web/API/CanvasRenderingContext2D/lineJoin).
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| `borderWidth` | arc border width (in pixels).
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| `offset` | arc offset (in pixels).
@@ -168,6 +174,8 @@ The interaction with each arc can be controlled with the following properties:
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| ---- | -----------
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| `hoverBackgroundColor` | arc background color when hovered.
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| `hoverBorderColor` | arc border color when hovered.
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| `hoverBorderDash` | arc border length and spacing of dashes when hovered. See [MDN](https://developer.mozilla.org/en-US/docs/Web/API/CanvasRenderingContext2D/setLineDash).
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| `hoverBorderDashOffset` | arc border offset for line dashes when hovered. See [MDN](https://developer.mozilla.org/en-US/docs/Web/API/CanvasRenderingContext2D/lineDashOffset).
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| `hoverBorderJoinStyle` | arc border join style when hovered. See [MDN](https://developer.mozilla.org/en-US/docs/Web/API/CanvasRenderingContext2D/lineJoin).
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| `hoverBorderWidth` | arc border width when hovered (in pixels).
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| `hoverOffset` | arc offset when hovered (in pixels).

‎docs/charts/polar.md‎

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@@ -58,12 +58,16 @@ The following options can be included in a polar area chart dataset to configure
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| [`backgroundColor`](#styling) | [`Color`](../general/colors.md) | Yes | Yes | `'rgba(0, 0, 0, 0.1)'`
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| [`borderAlign`](#border-alignment) | `'center'`\|`'inner'` | Yes | Yes | `'center'`
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| [`borderColor`](#styling) | [`Color`](../general/colors.md) | Yes | Yes | `'#fff'`
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| [`borderDash`](#styling) | `number[]` | Yes | - | `[]`
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| [`borderDashOffset`](#styling) | `number` | Yes | - | `0.0`
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| [`borderJoinStyle`](#styling) | `'round'`\|`'bevel'`\|`'miter'` | Yes | Yes | `undefined`
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| [`borderWidth`](#styling) | `number` | Yes | Yes | `2`
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| [`clip`](#general) | `number`\|`object`\|`false` | - | - | `undefined`
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| [`data`](#data-structure) | `number[]` | - | - | **required**
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| [`hoverBackgroundColor`](#interactions) | [`Color`](../general/colors.md) | Yes | Yes | `undefined`
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| [`hoverBorderColor`](#interactions) | [`Color`](../general/colors.md) | Yes | Yes | `undefined`
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| [`hoverBorderDash`](#interactions) | `number[]` | Yes | - | `undefined`
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| [`hoverBorderDashOffset`](#interactions) | `number` | Yes | - | `undefined`
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| [`hoverBorderJoinStyle`](#interactions) | `'round'`\|`'bevel'`\|`'miter'` | Yes | Yes | `undefined`
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| [`hoverBorderWidth`](#interactions) | `number` | Yes | Yes | `undefined`
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| [`circular`](#styling) | `boolean` | Yes | Yes | `true`
@@ -84,6 +88,8 @@ The style of each arc can be controlled with the following properties:
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| ---- | ----
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| `backgroundColor` | arc background color.
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| `borderColor` | arc border color.
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| `borderDash` | arc border length and spacing of dashes. See [MDN](https://developer.mozilla.org/en-US/docs/Web/API/CanvasRenderingContext2D/setLineDash).
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| `borderDashOffset` | arc border offset for line dashes. See [MDN](https://developer.mozilla.org/en-US/docs/Web/API/CanvasRenderingContext2D/lineDashOffset).
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| `borderJoinStyle` | arc border join style. See [MDN](https://developer.mozilla.org/en-US/docs/Web/API/CanvasRenderingContext2D/lineJoin).
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| `borderWidth` | arc border width (in pixels).
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| `circular` | By default the Arc is curved. If `circular: false` the Arc will be flat.
@@ -107,6 +113,8 @@ The interaction with each arc can be controlled with the following properties:
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| ---- | -----------
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| `hoverBackgroundColor` | arc background color when hovered.
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| `hoverBorderColor` | arc border color when hovered.
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| `hoverBorderDash` | arc border length and spacing of dashes when hovered. See [MDN](https://developer.mozilla.org/en-US/docs/Web/API/CanvasRenderingContext2D/setLineDash).
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| `hoverBorderDashOffset` | arc border offset for line dashes when hovered. See [MDN](https://developer.mozilla.org/en-US/docs/Web/API/CanvasRenderingContext2D/lineDashOffset).
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| `hoverBorderJoinStyle` | arc border join style when hovered. See [MDN](https://developer.mozilla.org/en-US/docs/Web/API/CanvasRenderingContext2D/lineJoin).
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| `hoverBorderWidth` | arc border width when hovered (in pixels).
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‎docs/configuration/elements.md‎

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@@ -100,6 +100,8 @@ Namespace: `options.elements.arc`, global arc options: `Chart.defaults.elements.
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| `backgroundColor` | [`Color`](/general/colors.md) | `Chart.defaults.backgroundColor` | Arc fill color.
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| `borderAlign` | `'center'`\|`'inner'` | `'center'` | Arc stroke alignment.
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| `borderColor` | [`Color`](/general/colors.md) | `'#fff'` | Arc stroke color.
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| `borderDash` | `number[]` | `[]` | Arc line dash. See [MDN](https://developer.mozilla.org/en-US/docs/Web/API/CanvasRenderingContext2D/setLineDash).
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| `borderDashOffset` | `number` | `0.0` | Arc line dash offset. See [MDN](https://developer.mozilla.org/en-US/docs/Web/API/CanvasRenderingContext2D/lineDashOffset).
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| `borderJoinStyle` | `'round'`\|`'bevel'`\|`'miter'` | `'bevel'`\|`'round'` | Line join style. See [MDN](https://developer.mozilla.org/en-US/docs/Web/API/CanvasRenderingContext2D/lineJoin). The default is `'round'` when `borderAlign` is `'inner'`
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| `borderWidth`| `number` | `2` | Arc stroke width.
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| `circular` | `boolean` | `true` | By default the Arc is curved. If `circular: false` the Arc will be flat

‎src/controllers/controller.doughnut.js‎

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@@ -76,7 +76,7 @@ export default class DoughnutController extends DatasetController {
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static descriptors = {
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_scriptable: (name) => name !== 'spacing',
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_indexable: (name) => name !== 'spacing',
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_indexable: (name) => name !== 'spacing' && !name.startsWith('borderDash') && !name.startsWith('hoverBorderDash'),
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};
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/**

‎src/elements/element.arc.ts‎

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@@ -213,13 +213,16 @@ function drawBorder(
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circular: boolean,
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) {
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const {fullCircles, startAngle, circumference, options} = element;
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const {borderWidth, borderJoinStyle} = options;
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const {borderWidth, borderJoinStyle, borderDash, borderDashOffset} = options;
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const inner = options.borderAlign === 'inner';
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if (!borderWidth) {
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return;
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}
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ctx.setLineDash(borderDash || []);
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ctx.lineDashOffset = borderDashOffset;
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if (inner) {
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ctx.lineWidth = borderWidth * 2;
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ctx.lineJoin = borderJoinStyle || 'round';
@@ -264,6 +267,8 @@ export default class ArcElement extends Element<ArcProps, ArcOptions> {
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static defaults = {
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borderAlign: 'center',
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borderColor: '#fff',
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borderDash: [],
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borderDashOffset: 0,
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borderJoinStyle: undefined,
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borderRadius: 0,
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borderWidth: 2,
@@ -277,6 +282,11 @@ export default class ArcElement extends Element<ArcProps, ArcOptions> {
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backgroundColor: 'backgroundColor'
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};
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static descriptors = {
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_scriptable: true,
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_indexable: (name) => name !== 'borderDash'
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};
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circumference: number;
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endAngle: number;
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fullCircles: number;

‎src/types/index.d.ts‎

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@@ -1700,7 +1700,16 @@ export interface ArcOptions extends CommonElementOptions {
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* Arc stroke alignment.
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*/
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borderAlign: 'center' | 'inner';
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/**
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* Line dash. See MDN.
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* @default []
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*/
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borderDash: number[];
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/**
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* Line dash offset. See MDN.
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* @default 0.0
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*/
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borderDashOffset: number;
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/**
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* Line join style. See MDN. Default is 'round' when `borderAlign` is 'inner', else 'bevel'.
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*/
@@ -1730,6 +1739,8 @@ export interface ArcOptions extends CommonElementOptions {
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}
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export interface ArcHoverOptions extends CommonHoverOptions {
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hoverBorderDash: number[];
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hoverBorderDashOffset: number;
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hoverOffset: number;
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}
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‎test/fixtures/controller.doughnut/borderDash/scriptable.js‎

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@@ -0,0 +1,34 @@
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module.exports = {
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config: {
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type: 'doughnut',
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data: {
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labels: [0, 1, 2, 3, 4, 5],
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datasets: [
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{
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// option in element (fallback)
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data: [5, 2, 4, 7, 6, 8]
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}
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]
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},
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options: {
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elements: {
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arc: {
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backgroundColor: 'transparent',
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borderColor: 'black',
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borderWidth: 1,
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borderDash: function(ctx) {
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var value = (ctx.dataIndex || 0) % 2;
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return value === 0 ? [3, 3] : [];
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}
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}
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},
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}
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},
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options: {
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canvas: {
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height: 256,
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width: 512
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}
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}
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};

‎test/fixtures/controller.doughnut/borderDash/scriptable.png‎

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‎test/fixtures/controller.doughnut/borderDash/value.js‎

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@@ -0,0 +1,36 @@
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module.exports = {
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config: {
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type: 'polarArea',
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data: {
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labels: [0, 1, 2, 3, 4, 5],
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datasets: [
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{
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// option in dataset
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data: [5, 2, 4, 7, 6, 8],
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borderAlign: 'inner',
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borderColor: 'black'
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},
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]
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},
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options: {
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elements: {
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arc: {
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backgroundColor: 'transparent',
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borderWidth: 1,
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borderDash: [3, 3]
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}
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},
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scales: {
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r: {
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display: false
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}
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}
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}
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},
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options: {
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canvas: {
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height: 256,
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width: 512
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}
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}
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};

‎test/fixtures/controller.doughnut/borderDash/value.png‎

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