harmony 鸿蒙marquee

2023-06-24
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marquee

The <marquee> component is used to display a scrolling piece of text.

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
scrollamount	number	6	No	Maximum length of each scroll.
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
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.

Styles

Name	Type	Default Value	Mandatory	Description
color	<color>	#ffffff	No	Font color of the scrolling text.
font-size	<length>	30	No	Font size of the scrolling text.
font-family	string	SourceHanSansSC-Regular	No	Font. Only the SourceHanSansSC-Regular font is supported.
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.
opacity⁵⁺	number	1	No	Opacity of an element. The value ranges from 0 to 1. The value 1 means opaque, and 0 means completely transparent.
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	left\|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">
  <marquee class="customMarquee" scrollamount="{{scrollAmount}}">{{marqueeCustomData}}</marquee>
  <text class="text" onclick="addSpeed">speed+</text>
  <text class="text" onclick="downSpeed">speed-</text>
  <text class="text" onclick="changeData">changeData</text>
</div>

/* xxx.css */
.container {
  flex-direction: column;
  width: 100%;
  height: 100%;
  flex-direction: column;
  align-items: center;
}
.customMarquee {
  width: 50%;
  height: 80px;
  padding: 10px;
  margin: 20px;
  border-width: 4px;
  border-color: #ffffff;
  border-radius: 20px;
  font-size: 38px;
}
.text {
  font-size: 30px;
  text-align: center;
  width: 30%;
  height: 10%;
  margin-top: 5%;
  background-color: #f2f2f2;
  border-radius: 40px;
  color: #0d81f2;
}

// xxx.js
export default {
  data: {
    scrollAmount: 30,
    marqueeCustomData: 'Custom marquee Custom marquee Custom marquee'
  },
  addSpeed() {
    this.scrollAmount++;
  },
  downSpeed() {
    this.scrollAmount--;
  },
  changeData() {
    this.marqueeCustomData = 'Change Data Change Data Change Data';
  }
}

marquee