| 摘要 |
A layout animation system is described herein that performs smooth transitions for properties of a layout, regardless of whether the layout properties are discrete or automatically calculated. Before a transition is executed, the layout animation system extracts and stores the positioning, sizing, and visibility of participating elements across the layout hierarchy. The system places the affected elements in the same position, size, and visibility as the outgoing state requests and animates the elements to an incoming state. For each element, the system calculates a smooth animation that transforms the element from the outgoing position, size, and visibility to the incoming position, size, and visibility. The system then animates the elements over a desired transition time. Thus, the layout animation system provides the ability to create smooth layout transitions in the presence of automatic layout management for properties of various types. |
