harmony 鸿蒙Ellipse

2022-08-09
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Ellipse

The <Ellipse> component is used to draw an ellipse.

NOTE

This component is supported since API version 7. Updates will be marked with a superscript to indicate their earliest API version.

Child Components

Not supported

APIs

Ellipse(options?: {width?: string|number, height?: string|number})

Since API version 9, this API is supported in ArkTS widgets.

Parameters

Name	Type	Mandatory	Description
width	string \|number	No	Width. Default value: 0 NOTE An invalid value is handled as the default value.
height	string \|number	No	Height. Default value: 0 NOTE An invalid value is handled as the default value.

Attributes

In addition to the universal attributes, the following attributes are supported.

Name	Type	Default Value	Description
fill	ResourceColor	Color.Black	Color of the fill area. Since API version 9, this API is supported in ArkTS widgets. NOTE An invalid value is handled as the default value.
fillOpacity	number \|string \|Resource	1	Opacity of the fill area. Since API version 9, this API is supported in ArkTS widgets. NOTE An invalid value is handled as the default value.
stroke	ResourceColor	-	Stroke color. If this attribute is not set, the component does not have any stroke. Since API version 9, this API is supported in ArkTS widgets. NOTE If the value is invalid, no stroke will be drawn.
strokeDashArray	Array<Length>	[]	Stroke dashes. Since API version 9, this API is supported in ArkTS widgets. NOTE An invalid value is handled as the default value.
strokeDashOffset	number \|string	0	Offset of the start point for drawing the stroke. Since API version 9, this API is supported in ArkTS widgets. NOTE An invalid value is handled as the default value.
strokeLineCap	LineCapStyle	LineCapStyle.Butt	Cap style of the stroke. Since API version 9, this API is supported in ArkTS widgets.
strokeLineJoin	LineJoinStyle	LineJoinStyle.Miter	Join style of the stroke. Since API version 9, this API is supported in ArkTS widgets. NOTE This attribute does not work for the <ellipse> component, which does not have corners.
strokeMiterLimit	number \|string	4	Limit on the ratio of the miter length to the value of strokeWidth used to draw a miter join. Since API version 9, this API is supported in ArkTS widgets. NOTE This attribute does not take effect for the <Ellipse> component, because it does not have a miter join.
strokeOpacity	number \|string \|Resource	1	Stroke opacity. Since API version 9, this API is supported in ArkTS widgets. NOTE 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.
strokeWidth	Length	1	Stroke width. Since API version 9, this API is supported in ArkTS widgets. NOTE The value cannot be a percentage. An invalid value is handled as the default value.
antiAlias	boolean	true	Whether anti-aliasing is enabled. Since API version 9, this API is supported in ArkTS widgets.

Example

// xxx.ets
@Entry
@Component
struct EllipseExample {
  build() {
    Column({ space: 10 }) {
      // Draw a 150 x 80 ellipse.
      Ellipse({ width: 150, height: 80 })
      // Draw a 150 x 100 ellipse with blue strokes.
      Ellipse()
        .width(150)
        .height(100)
        .fillOpacity(0)
        .stroke(Color.Blue)
        .strokeWidth(3)
    }.width('100%')
  }
}

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