harmony 鸿蒙Menu

2023-06-24
浏览 (649)

NOTE

Rules for calculating the width of menus and menu items:

During the layout, the width of each menu item is expected to be the same. If a child component has its width set, the size calculation rule prevails.

If the width is not set, the <Menu> component sets the default width of two columns for the <MenuItem> and <MenuItemGroup> child components. If a menu item’s content area is wider than two columns, the <Menu> component automatically expands the menu item content area.

When the width is set, the <Menu> component sets the <MenuItem> and <MenuItemGroup> child components to the fixed width (set width minus the padding).

Attributes

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

Name	Type	Description
fontSize^(deprecated)	Length	Font size of the menu text. When Length is of the number type, the unit is fp. This API is deprecated since API version 10. You are advised to use font instead.
font¹⁰⁺	Font	Font style of the menu text.
fontColor¹⁰⁺	ResourceColor	Font color of the menu text.
radius¹⁰⁺	Dimension \|BorderRadiuses	Radius of the menu border corners. The default value follows the theme. If the value is greater than half of the menu width, the default value is used.
width¹⁰⁺	Length	Menu border width. The minimum width is 64 vp.

Example

@Entry
@Component
struct Index {
  @State select: boolean = true
  private iconStr: ResourceStr = $r("app.media.view_list_filled")
  private iconStr2: ResourceStr = $r("app.media.view_list_filled")

  @Builder
  SubMenu() {
    Menu() {
      MenuItem({ content: "Copy", labelInfo: "Ctrl+C" })
      MenuItem({ content: "Paste", labelInfo: "Ctrl+V" })
    }
  }

  @Builder
  MyMenu(){
    Menu() {
      MenuItem({ startIcon: $r("app.media.icon"), content: "Menu option" })
      MenuItem({ startIcon: $r("app.media.icon"), content: "Menu option" })
        .enabled(false)
      MenuItem({
        startIcon: this.iconStr,
        content: "Menu option",
        endIcon: $r("app.media.arrow_right_filled"),
        builder: ():void=>this.SubMenu()
      })
      MenuItemGroup({ header: 'Subtitle' }) {
        MenuItem ({ content: "Menu option" })
          .selectIcon(true)
          .selected(this.select)
          .onChange((selected) => {
            console.info("menuItem select" + selected);
            this.iconStr2 = $r("app.media.icon");
          })
        MenuItem({
          startIcon: $r("app.media.view_list_filled"),
          content: "Menu option",
          endIcon: $r("app.media.arrow_right_filled"),
          builder: ():void=>this.SubMenu()
        })
      }
      MenuItem({
        startIcon: this.iconStr2,
        content: "Menu option",
        endIcon: $r("app.media.arrow_right_filled")
      })
    }
  }

  build() {
    Row() {
      Column() {
        Text('click to show menu')
          .fontSize(50)
          .fontWeight(FontWeight.Bold)
      }
      .bindMenu(this.MyMenu)
      .width('100%')
    }
    .height('100%')
  }
}

menu1