harmony 鸿蒙slider

2023-06-24
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slider

The <Slider> component is used to quickly adjust settings, such as the volume and brightness.

NOTE

This component is supported since API version 4. Updates will be marked with a superscript to indicate their earliest API version.

Child Components

Not supported

Attributes

Name	Type	Default Value	Mandatory	Description
min	number	0	No	Minimum value of the slider.
max	number	100	No	Maximum value of the slider.
value	number	0	No	Initial value of the slider.
id	string	-	No	Unique ID of the component.
style	string	-	No	Style declaration of the component.
class	string	-	No	Style class of the component, which is used to refer to a style table.
ref	string	-	No	Reference information of child elements, which is registered with the parent component on $refs.

Events

Name	Parameter	Description
change	ChangeEvent	Triggered when the value changes.
click	-	Triggered when the component is clicked.
longpress	-	Triggered when the component is long pressed.
swipe⁵⁺	SwipeEvent	Triggered when a user quickly swipes on the component.

Table 1 ChangeEvent

Attribute	Type	Description
progress^{(deprecated⁵⁺)}	string	Current value of the slider.
value⁵⁺	number	Current value of the slider.

Styles

Name	Type	Default Value	Mandatory	Description
color	<color>	#000000	No	Background color of the slider.
selected-color	<color>	#ffffff	No	Selected color of the slider.
width	<length> \|<percentage>⁵⁺	-	No	Component width. If this attribute is not set, the default value 0 is used.
height	<length> \|<percentage>⁵⁺	-	No	Component height. If this attribute is not set, the default value 0 is used.
padding	<length>	0	No	Shorthand attribute to set the padding for all sides. The attribute can have one to four values: - If you set only one value, it specifies the padding for all the four sides. - If you set two values, the first value specifies the top and bottom padding, and the second value specifies the left and right padding. - If you set three values, the first value specifies the top padding, the second value specifies the left and right padding, and the third value specifies the bottom padding. - If you set four values, they respectively specify the padding for top, right, bottom, and left sides (in clockwise order).
padding-[left\|top\|right\|bottom]	<length>	0	No	Left, top, right, and bottom padding.
margin	<length> \|<percentage>⁵⁺	0	No	Shorthand attribute to set the margin for all sides. The attribute can have one to four values: - If you set only one value, it specifies the margin for all the four sides. - If you set two values, the first value specifies the top and bottom margins, and the second value specifies the left and right margins. - If you set three values, the first value specifies the top margin, the second value specifies the left and right margins, and the third value specifies the bottom margin. - If you set four values, they respectively specify the margin for top, right, bottom, and left sides (in clockwise order).
margin-[left\|top\|right\|bottom]	<length> \|<percentage>⁵⁺	0	No	Left, top, right, and bottom margins.
border-width	<length>	0	No	Shorthand attribute to set the margin for all sides.
border-color	<color>	black	No	Shorthand attribute to set the color for all borders.
border-radius	<length>	-	No	Radius of round-corner borders.
background-color	<color>	-	No	Background color.
display	string	flex	No	How and whether to display the box containing an element. Available values are as follows: - flex: flexible layout - none: not rendered
[left\|top]	<length> \|<percentage>⁶⁺	-	No	Edge of the element. - left: left edge position of the element. This attribute defines the offset between the left edge of the margin area of a positioned element and left edge of its containing block. - top: top edge position of the element. This attribute defines the offset between the top edge of a positioned element and that of a block included in the element.

Example

<!-- xxx.hml -->
<div class="container">
  <text>slider start value is {{startValue}}</text>
  <text>slider current value is {{currentValue}}</text>
  <text>slider end value is {{endValue}}</text>
  <slider min="0" max="100" value="{{value}}" onchange="setvalue" style="width: 20%;height: 10%"></slider>
</div>

/* xxx.css */
.container {
  flex-direction: column;
  justify-content: center;
  align-items: center;
  width: 100%;
  height: 100%;
}

// xxx.js
export default {
  data: {
    value: 0,
    startValue: 0,
    currentValue: 0,
    endValue: 100,
  },
  setvalue(e) {
    this.currentValue = e.value;
  }
}

slider