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RNPinchHandler.m
175 lines (147 loc) · 4.75 KB
/
RNPinchHandler.m
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//
// RNPinchHandler.m
// RNGestureHandler
//
// Created by Krzysztof Magiera on 12/10/2017.
// Copyright © 2017 Software Mansion. All rights reserved.
//
#import "RNPinchHandler.h"
#if !TARGET_OS_TV
#if TARGET_OS_OSX
@interface RNBetterPinchRecognizer : NSMagnificationGestureRecognizer {
CGFloat prevMagnification;
NSTimeInterval prevTime;
}
@property (nonatomic, readonly) CGFloat velocity;
#else
@interface RNBetterPinchRecognizer : UIPinchGestureRecognizer
#endif
- (id)initWithGestureHandler:(RNGestureHandler *)gestureHandler;
@end
@implementation RNBetterPinchRecognizer {
__weak RNGestureHandler *_gestureHandler;
}
- (id)initWithGestureHandler:(RNGestureHandler *)gestureHandler
{
if ((self = [super initWithTarget:self action:@selector(handleGesture:)])) {
_gestureHandler = gestureHandler;
}
#if TARGET_OS_OSX
prevMagnification = 0;
prevTime = 0;
#endif
return self;
}
- (void)handleGesture:(UIGestureRecognizer *)recognizer
{
if (self.state == UIGestureRecognizerStateBegan) {
#if TARGET_OS_OSX
self.magnification = 1;
#else
self.scale = 1;
#endif
}
[_gestureHandler handleGesture:recognizer];
}
- (void)interactionsBegan:(NSSet *)touches withEvent:(UIEvent *)event
{
[_gestureHandler.pointerTracker touchesBegan:touches withEvent:event];
}
- (void)interactionsMoved:(NSSet *)touches withEvent:(UIEvent *)event
{
[_gestureHandler.pointerTracker touchesMoved:touches withEvent:event];
}
- (void)interactionsEnded:(NSSet *)touches withEvent:(UIEvent *)event
{
[_gestureHandler.pointerTracker touchesEnded:touches withEvent:event];
}
- (void)interactionsCancelled:(NSSet *)touches withEvent:(UIEvent *)event
{
[_gestureHandler.pointerTracker touchesCancelled:touches withEvent:event];
}
#if TARGET_OS_OSX
- (void)magnifyWithEvent:(NSEvent *)event
{
[super magnifyWithEvent:event];
switch (self.state) {
case NSGestureRecognizerStateBegan:
[_gestureHandler setCurrentPointerTypeToMouse];
[self interactionsBegan:[NSSet setWithObject:event] withEvent:event];
break;
case NSGestureRecognizerStateChanged:
[self interactionsMoved:[NSSet setWithObject:event] withEvent:event];
break;
case NSGestureRecognizerStateEnded:
[self interactionsEnded:[NSSet setWithObject:event] withEvent:event];
break;
case NSGestureRecognizerStateCancelled:
[self interactionsCancelled:[NSSet setWithObject:event] withEvent:event];
break;
}
_velocity = (self.magnification - prevMagnification) / ((event.timestamp - prevTime) * 1000);
prevMagnification = self.magnification;
prevTime = event.timestamp;
}
#else
- (void)touchesBegan:(NSSet<RNGHUITouch *> *)touches withEvent:(UIEvent *)event
{
[_gestureHandler setCurrentPointerType:event];
[super touchesBegan:touches withEvent:event];
[self interactionsBegan:touches withEvent:event];
}
- (void)touchesMoved:(NSSet<RNGHUITouch *> *)touches withEvent:(UIEvent *)event
{
[super touchesMoved:touches withEvent:event];
[self interactionsMoved:touches withEvent:event];
}
- (void)touchesEnded:(NSSet<RNGHUITouch *> *)touches withEvent:(UIEvent *)event
{
[super touchesEnded:touches withEvent:event];
[self interactionsEnded:touches withEvent:event];
}
- (void)touchesCancelled:(NSSet<RNGHUITouch *> *)touches withEvent:(UIEvent *)event
{
[super touchesCancelled:touches withEvent:event];
[self interactionsCancelled:touches withEvent:event];
}
#endif
- (void)reset
{
[_gestureHandler.pointerTracker reset];
[super reset];
[_gestureHandler reset];
}
@end
#endif
@implementation RNPinchGestureHandler
- (instancetype)initWithTag:(NSNumber *)tag
{
if ((self = [super initWithTag:tag])) {
#if !TARGET_OS_TV
_recognizer = [[RNBetterPinchRecognizer alloc] initWithGestureHandler:self];
#endif
}
return self;
}
#if !TARGET_OS_TV
#if TARGET_OS_OSX
- (RNGestureHandlerEventExtraData *)eventExtraData:(NSMagnificationGestureRecognizer *)recognizer
{
return [RNGestureHandlerEventExtraData forPinch:recognizer.magnification
withFocalPoint:[recognizer locationInView:recognizer.view]
withVelocity:((RNBetterPinchRecognizer *)recognizer).velocity
withNumberOfTouches:2
withPointerType:RNGestureHandlerMouse];
}
#else
- (RNGestureHandlerEventExtraData *)eventExtraData:(UIPinchGestureRecognizer *)recognizer
{
return [RNGestureHandlerEventExtraData forPinch:recognizer.scale
withFocalPoint:[recognizer locationInView:recognizer.view]
withVelocity:recognizer.velocity
withNumberOfTouches:recognizer.numberOfTouches
withPointerType:_pointerType];
}
#endif
#endif // !TARGET_OS_TV
@end