所有系统设计应该在架构上反映这种控制层次。
Any system design should reflect control hierarchy in the architecture.
GUI组件需要在屏幕上显示,必须是控制层次的一部份。
To appear onscreen, every GUI component must be part of a containment hierarchy.
一个控制层次是一个拥有一个顶层容器作为它的根的树组件。
A containment hierarchy is a tree of components that has a top-level container as its root. We'll show you one in a bit.
应用推荐