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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 20:43:37 -08:00
committed by Facebook Github Bot
parent bf2b435322
commit 6535858c71
8 changed files with 59 additions and 0 deletions
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ReactAndroid/src/main/java/com/facebook/react/animated/ValueAnimatedNode.java
+5
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@@ -40,6 +40,11 @@ import javax.annotation.Nullable;
mOffset = 0;
}
public void extractOffset() {
mOffset += mValue;
mValue = 0;
}
public void onValueUpdate() {
if (mValueListener == null) {
return;