如果某个容器对象的子对象可以在该容器的边界内自由移动、调整大小或旋转，子对象也必须支持此控件模式。
This control pattern must also be supported by the children of a container object if the children can be moved, resized, or rotated freely within the boundaries of the container.
如果某个容器对象的子对象可以在该容器的边界内自由移动、调整大小或旋转，子对象也必须支持此控件模式。
This control pattern must also be supported by the children of a container object if the children can be moved, resized, or rotated freely within the boundaries of the container.
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