1# Polygon 2 3The **\<Polygon>** component is used to draw a polygon. 4 5> **NOTE** 6> 7> This component is supported since API version 7. Updates will be marked with a superscript to indicate their earliest API version. 8 9 10## Child Components 11 12Not supported 13 14 15## APIs 16 17Polygon(value?: {width?: string | number, height?: string | number}) 18 19Since API version 9, this API is supported in ArkTS widgets. 20 21**Parameters** 22 23| Name| Type| Mandatory| Default Value| Description| 24| -------- | -------- | -------- | -------- | -------- | 25| width | string \| number | No| 0 | Width.<br>**NOTE**<br>An invalid value is handled as the default value.| 26| height | string \| number | No| 0 | Height.<br>**NOTE**<br>An invalid value is handled as the default value.| 27 28 29 30## Attributes 31 32In addition to the [universal attributes](ts-universal-attributes-size.md), the following attributes are supported. 33 34| Name| Type| Default Value| Description| 35| -------- | -------- | -------- | -------- | 36| points | Array<Point> | [] | Vertex coordinates of the polygon.<br>Since API version 9, this API is supported in ArkTS widgets.<br>**NOTE**<br>An invalid value is handled as the default value.| 37| fill | [ResourceColor](ts-types.md) | Color.Black | Color of the fill area.<br>Since API version 9, this API is supported in ArkTS widgets.<br>**NOTE**<br>An invalid value is handled as the default value.| 38| fillOpacity | number \| string \| [Resource](ts-types.md#resource)| 1 | Opacity of the fill area.<br>Since API version 9, this API is supported in ArkTS widgets.<br>**NOTE**<br>An invalid value is handled as the default value.| 39| stroke | [ResourceColor](ts-types.md) | - | Stroke color. If this attribute is not set, the component does not have any stroke.<br>Since API version 9, this API is supported in ArkTS widgets.<br>**NOTE**<br>If the value is invalid, no stroke will be drawn.| 40| strokeDashArray | Array<Length> | [] | Stroke dashes.<br>Since API version 9, this API is supported in ArkTS widgets.<br>**NOTE**<br>An invalid value is handled as the default value.| 41| strokeDashOffset | number \| string | 0 | Offset of the start point for drawing the stroke.<br>Since API version 9, this API is supported in ArkTS widgets.<br>**NOTE**<br>An invalid value is handled as the default value.| 42| strokeLineCap | [LineCapStyle](ts-appendix-enums.md#linecapstyle) | LineCapStyle.Butt | Cap style of the stroke.<br>Since API version 9, this API is supported in ArkTS widgets.| 43| strokeLineJoin | [LineJoinStyle](ts-appendix-enums.md#linejoinstyle) | LineJoinStyle.Miter | Join style of the stroke.<br>Since API version 9, this API is supported in ArkTS widgets.| 44| strokeMiterLimit | number \| string | 4 | Limit on the ratio of the miter length to the value of **strokeWidth** used to draw a miter join. The miter length indicates the distance from the outer tip to the inner corner of the miter.<br>**NOTE**<br>This attribute works only when **strokeLineJoin** is set to **LineJoinStyle.Miter**.<br>The value must be greater than or equal to 1.0. If the value is in the [0, 1) range, the value **1.0** will be used. In other cases, the default value will be used.<br>Since API version 9, this API is supported in ArkTS widgets.| 45| strokeOpacity | number \| string \| [Resource](ts-types.md#resource)| 1 | Stroke opacity.<br>**NOTE**<br>The value range is [0.0, 1.0]. A value less than 0.0 evaluates to the value **0.0**. A value greater than 1.0 evaluates to the value **1.0**. Any other value evaluates to the value **1.0**.<br>Since API version 9, this API is supported in ArkTS widgets.| 46| strokeWidth | Length | 1 | Stroke width.<br>Since API version 9, this API is supported in ArkTS widgets.<br>**NOTE**<br>The value cannot be a percentage.<br>An invalid value is handled as the default value.| 47| antiAlias | boolean | true | Whether anti-aliasing is enabled.<br>Since API version 9, this API is supported in ArkTS widgets.| 48 49## Point 50 51Describes the coordinates of a point. 52 53Since API version 9, this API is supported in ArkTS widgets. 54 55| Name | Type | Description | 56| --------- | -------------------- | ------------------------------------------------------------ | 57| Point | [number, number] | Coordinates of a point. The first parameter is the x-coordinate, and the second parameter is the y-coordinate (relative coordinate).| 58 59 60## Example 61 62```ts 63// xxx.ets 64@Entry 65@Component 66struct PolygonExample { 67 build() { 68 Column({ space: 10 }) { 69 // Draw a triangle in a 100 x 100 rectangle. The start point is (0, 0), the end point is (100, 0), and the passing point is (50, 100). 70 Polygon({ width: 100, height: 100 }) 71 .points([[0, 0], [50, 100], [100, 0]]) 72 .fill(Color.Green) 73 // Draw a quadrilateral in a 100 x 100 rectangle. The start point is (0, 0), the end point is (100, 0), and the passing points are (0, 100) and (100, 100). 74 Polygon().width(100).height(100) 75 .points([[0, 0], [0, 100], [100, 100], [100, 0]]) 76 .fillOpacity(0) 77 .strokeWidth(5) 78 .stroke(Color.Blue) 79 // Draw a pentagon in a 100 x 100 rectangle. The start point is (50, 0), the end point is (100, 50), and the passing points are (0, 50), (20, 100), and (80, 100). 80 Polygon().width(100).height(100) 81 .points([[50, 0], [0, 50], [20, 100], [80, 100], [100, 50]]) 82 .fill(Color.Red) 83 .fillOpacity(0.6) 84 }.width('100%').margin({ top: 10 }) 85 } 86} 87``` 88 89 90
