react-native/Libraries/NativeAnimation/Nodes/RCTValueAnimatedNode.h
Ryan Gomba 6535858c71 Add extractOffset to Animated
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
2016-11-07 20:43:37 -08:00

31 lines
792 B
Objective-C

/**
* Copyright (c) 2015-present, Facebook, Inc.
* All rights reserved.
*
* This source code is licensed under the BSD-style license found in the
* LICENSE file in the root directory of this source tree. An additional grant
* of patent rights can be found in the PATENTS file in the same directory.
*/
#import "RCTAnimatedNode.h"
#import <UIKit/UIKit.h>
@class RCTValueAnimatedNode;
@protocol RCTValueAnimatedNodeObserver <NSObject>
- (void)animatedNode:(RCTValueAnimatedNode *)node didUpdateValue:(CGFloat)value;
@end
@interface RCTValueAnimatedNode : RCTAnimatedNode
- (void)setOffset:(CGFloat)offset;
- (void)flattenOffset;
- (void)extractOffset;
@property (nonatomic, assign) CGFloat value;
@property (nonatomic, weak) id<RCTValueAnimatedNodeObserver> valueObserver;
@end