Navigation Menu导航菜单

options := components.NavigationMenuOptions{
    Open: open, Content: panel, Layer: 2,
    DismissID: tree.ID(page, "dismiss"), Scope: tree.ID(page, "content"),
}
menu := components.BeginNavigationMenu(canvas, theme, bounds, options)
menu.AddTrigger(components.NavigationMenuTrigger{
    ID: tree.ID(page, "products"), Label: "Products", Open: open,
})
content := menu.BeginContent()
content.AddLink(components.NavigationMenuLink{
    ID: tree.ID(page, "guide"), Label: "Getting started",
    Description: "Build a native window and retained scene.", Value: "/guide",
})
if canvas.Clicked(tree.ID(page, "products")) { open = !open }

trigger := tree.ID(page, "products")
options := components.NavigationMenuOptions{
    Open: true, DirectContent: true, Content: panel, Layer: 2,
    Scope: tree.ID(page, "content"),
}
menu := components.BeginNavigationMenu(canvas, theme, bounds, options)
menu.AddTrigger(components.NavigationMenuTrigger{
    ID: trigger, Label: "Products", Open: true,
})
content := menu.BeginContent()
content.AddLink(components.NavigationMenuLink{
    ID: tree.ID(page, "guide"), Label: "Getting started",
    Description: "Build a native window and retained scene.", Value: "/guide",
})