Dropdown Menu下拉菜单

menu := components.BeginDropdownMenu(canvas, theme, bounds, components.DropdownMenuOptions{Layer: 1})
menu.AddLabel("skyler@example.com", false)
menu.AddItem(components.DropdownMenuItem{ID: tree.ID(page, "profile"), Label: "Profile", Shortcut: "⇧⌘P"})
menu.AddItem(components.DropdownMenuItem{
    ID: toggleID, Label: "Compact mode", Kind: components.DropdownMenuCheckbox, Checked: compact,
})
menu.AddSeparator()
menu.AddItem(components.DropdownMenuItem{
    ID: tree.ID(page, "sign-out"), Label: "Sign out", Variant: components.DropdownMenuItemDestructive,
})
menu.End()
if canvas.Clicked(toggleID) { compact = !compact }

items := tree.Sub(page, tree.Name("item"))
menu := components.BeginDropdownMenu(canvas, theme, bounds, components.DropdownMenuOptions{Layer: 1})
menu.AddItem(components.DropdownMenuItem{
    ID: items.At(0), Label: "Team", Kind: components.DropdownMenuSubmenu, Expanded: true,
})
for index, label := range []string{"Personal", "Organization"} {
    menu.AddItem(components.DropdownMenuItem{
        ID: items.At(index + 1), Label: label, Kind: components.DropdownMenuRadio, Selected: scope == index+1,
    })
}
menu.AddItem(components.DropdownMenuItem{ID: items.At(3), Label: "Unavailable", Disabled: true})
menu.End()
if index, ok := canvas.ClickedIn(items); ok && index > 0 && index < 3 { scope = int(index) }