harmony 鸿蒙Ellipse

  • 2022-08-09
  • 浏览 (711)

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&lt;Length&gt; [] 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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