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Add extractOffset to Animated

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Summary:
`flattenOffset` has proven extremely useful, especially when dealing with pan responders and other gesture based animations, but I've also found a number of use cases for the inverse. This diff introduces `extractOffset`, which sets the offset value to the base value, and resets the base value to zero. A common use case would be to extractOffset onGrant and flattenOffset onRelease.
Closes https://github.com/facebook/react-native/pull/10721

Differential Revision: D4145744

fbshipit-source-id: dc2aa31652df0b31450556f611db43548180c7dd
This commit is contained in:
Ryan Gomba
2016-11-07 20:36:52 -08:00
committed by Facebook Github Bot
parent bf2b435322
commit 6535858c71
8 changed files with 59 additions and 0 deletions
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9
ReactAndroid/src/main/java/com/facebook/react/animated/NativeAnimatedNodesManager.java
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@@ -157,6 +157,15 @@ import javax.annotation.Nullable;
((ValueAnimatedNode) node).flattenOffset();
}
public void extractAnimatedNodeOffset(int tag) {
AnimatedNode node = mAnimatedNodes.get(tag);
if (node == null || !(node instanceof ValueAnimatedNode)) {
throw new JSApplicationIllegalArgumentException("Animated node with tag " + tag +
" does not exists or is not a 'value' node");
}
((ValueAnimatedNode) node).extractOffset();
}
public void startAnimatingNode(
int animationId,
int animatedNodeTag,