类型 NavigationMenuOptions

type NavigationMenuOptions struct {
	Open          bool
	DirectContent bool
	Content       ui.Rect
	Layer         uint16
	Scope         ui.ID
	DismissID     ui.ID
	// Viewport, with DismissID, makes an open navigation menu dismiss on a press
	// outside it and passes that press on, as a non-modal navigation menu does.
	Viewport ui.Rect
}