| Animation API |
| ============= |
| |
| (This is very incomplete, because it's all expected to be in the |
| framework, not the platform.) |
| |
| ```javascript |
| |
| dictionary EasingFunctionSettings { |
| Float duration; // required |
| Callback? completionCallback = null; |
| } |
| |
| abstract class EasingFunction { |
| abstract constructor (EasingFunctionSettings settings); |
| abstract Float getFactor(Float time); |
| // calls completionCallback if time >= duration |
| // then returns a number ostensibly in the range 0.0 to 1.0 |
| // (but it could in practice go outside this range, e.g. for |
| // animation styles that overreach then come back) |
| } |
| ``` |
| |
| |
| If you want to have two animations simultaneously, e.g. two |
| transforms, then you can add to the RenderNode's overrideStyles a |
| StyleValue that combines other StyleValues, e.g. a |
| "TransformStyleValueCombinerStyleValue", and then add to it the |
| regular animated StyleValues, e.g. multiple |
| "AnimatedTransformStyleValue" objects. A framework API could make |
| setting all that up easy, given the right underlying StyleValue |
| classes. |
