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.| 26| height | string \| number | No| 0 | Height.| 27 28 29## Attributes 30 31In addition to the [universal attributes](ts-universal-attributes-size.md), the following attributes are supported. 32 33| Name| Type| Default Value| Description| 34| -------- | -------- | -------- | -------- | 35| points | Array<Point> | [] | Vertex coordinates of the polygon.<br>Since API version 9, this API is supported in ArkTS widgets.| 36| fill | [ResourceColor](ts-types.md) | Color.Black | Color of the fill area.<br>Since API version 9, this API is supported in ArkTS widgets.| 37| 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.| 38| 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.| 39| strokeDashArray | Array<Length> | [] | Stroke dashes.<br>Since API version 9, this API is supported in ArkTS widgets.| 40| 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.| 41| 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.| 42| 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.| 43| 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 must be set to a value greater than or equal to 1 and takes effect when **strokeLineJoin** is set to **LineJoinStyle.Miter**.<br>Since API version 9, this API is supported in ArkTS widgets.| 44| strokeOpacity | number \| string \| [Resource](ts-types.md#resource)| 1 | Stroke opacity.<br>**NOTE**<br>The value range is [0.0, 1.0]. If the set value is less than 0.0, **0.0** will be used. If the set value is greater than 1.0, **1.0** will be used.<br>Since API version 9, this API is supported in ArkTS widgets.| 45| 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.| 46| antiAlias | boolean | true | Whether anti-aliasing is enabled.<br>Since API version 9, this API is supported in ArkTS widgets.| 47 48## Point 49 50Describes the coordinates of a point. 51 52Since API version 9, this API is supported in ArkTS widgets. 53 54| Name | Type | Description | 55| --------- | -------------------- | ------------------------------------------------------------ | 56| Point | [number, number] | Coordinates of a point. The first parameter is the x-coordinate, and the second parameter is the y-coordinate (relative coordinate).| 57 58 59## Example 60 61```ts 62// xxx.ets 63@Entry 64@Component 65struct PolygonExample { 66 build() { 67 Column({ space: 10 }) { 68 // 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). 69 Polygon({ width: 100, height: 100 }) 70 .points([[0, 0], [50, 100], [100, 0]]) 71 .fill(Color.Green) 72 // 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). 73 Polygon().width(100).height(100) 74 .points([[0, 0], [0, 100], [100, 100], [100, 0]]) 75 .fillOpacity(0) 76 .strokeWidth(5) 77 .stroke(Color.Blue) 78 // 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). 79 Polygon().width(100).height(100) 80 .points([[50, 0], [0, 50], [20, 100], [80, 100], [100, 50]]) 81 .fill(Color.Red) 82 .fillOpacity(0.6) 83 }.width('100%').margin({ top: 10 }) 84 } 85} 86``` 87 88 89
