Context Menu上下文菜单

menu := components.BeginContextMenu(canvas, theme, at, components.ContextMenuOptions{Layer: 1})
menu.AddItem(components.ContextMenuItem{ID: tree.ID(page, "open"), Label: "Open", Shortcut: "⌘O"})
menu.AddItem(components.ContextMenuItem{
    ID: toggleID, Label: "Show details", Kind: components.ContextMenuCheckbox, Checked: checked,
})
menu.AddItem(components.ContextMenuItem{
    ID: tree.ID(page, "open-with"), Label: "Open with", Kind: components.ContextMenuSubmenu, Expanded: true,
})
menu.AddSeparator()
menu.AddItem(components.ContextMenuItem{
    ID: tree.ID(page, "trash"), Label: "Move to trash", Variant: components.ContextMenuItemDestructive,
})
if canvas.Clicked(toggleID) { checked = !checked }

items := tree.Sub(page, tree.Name("item"))
menu := components.BeginContextMenu(canvas, theme, at, components.ContextMenuOptions{Layer: 1})
menu.AddLabel("Sort by", true)
for index, label := range []string{"Name", "Modified"} {
    menu.AddItem(components.ContextMenuItem{
        ID: items.At(index), Label: label, Kind: components.ContextMenuRadio, Selected: sortBy == index,
    })
}
menu.AddSeparator()
menu.AddItem(components.ContextMenuItem{ID: items.At(2), Label: "Unavailable action", Disabled: true})
if index, ok := canvas.ClickedIn(items); ok && index < 2 { sortBy = int(index) }