harmony 鸿蒙menu

2022-08-09
浏览 (697)

Name	Type	Default Value	Mandatory	Description
target	string	-	No	Target element to which the menu is attached. When the target element is clicked, the menu is automatically displayed. The menu is preferentially displayed in the lower right corner of the target element. If the visible space on the right is insufficient, the menu is moved leftward. If the visible space in the lower part is insufficient, the menu is moved upward.
type	string	click	No	Mode in which the target element triggers the pop-up menu. Available values are as follows: - click: The pop-up menu is triggered by clicking the target element. - longpress: The pop-up menu is triggered by long pressing the target element.
title	string	-	No	Title of the menu.

NOTE

The focusable and disabled attributes are not supported.

Styles

The following styles are supported.

Name	Type	Default Value	Mandatory	Description
text-color	<color>	-	No	Font color of the menu.
font-size	<length>	30px	No	Font size of the menu.
allow-scale	boolean	true	No	Whether the font size changes with the system’s font size settings. If the config-changes tag of fontSize is configured for abilities in the config.json file, the setting takes effect without application restart.
letter-spacing	<length>	0	No	Character spacing of the menu.
font-style	string	normal	No	Font style of the menu. For details, see font-weight of the <text> component.
font-weight	number \|string	normal	No	Font weight of the menu. For details, see font-weight of the <text> component.
font-family	string	sans-serif	No	Font family, in which fonts are separated by commas (,). Each font is set using a font name or font family name. The first font in the family or the specified custom font is used for the text.

Events

The following events are supported.

Name	Parameter	Description
selected	{ value:value }	Triggered when a value in the menu is selected. The return value is the value attribute of the <option> component.
cancel	-	Triggered when an operation is canceled by the user.

Methods

The following methods are supported.

Name	Parameter	Description
show	{ x:x, y:y }	Displays the menu. x and y specify the position of the displayed menu. x indicates the x coordinate from the left edge of the visible area, and does not include any scrolling offset. y indicates the y coordinate from the upper edge of the visible area, and does not include any scrolling offset or a status bar. The menu is preferentially displayed in the lower right corner of the target element. If the visible space on the right is insufficient, the menu is moved leftward. If the visible space in the lower part is insufficient, the menu is moved upward.

Example

<!-- xxx.hml -->
<div class="container">
  <text onclick="onTextClick" class="title-text">Show popup menu.</text>
  <menu id="apiMenu" onselected="onMenuSelected">
    <option value="Item 1">Item 1</option>
    <option value="Item 2">Item 2</option>
    <option value="Item 3">Item 3</option>
  </menu>
</div>

/* xxx.css */
.container {
  flex-direction: column;
  align-items: flex-start;
  justify-content: center;
}
.title-text {
  margin: 20px;
}

// xxx.js
import promptAction from '@ohos.promptAction';
export default {
  onMenuSelected(e) {
    promptAction.showToast({
      message: e.value
    })
  },
  onTextClick() {
    this.$element("apiMenu").show({x:280,y:120});
  }
}

menu13