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86 lines
3.3 KiB
86 lines
3.3 KiB
// Copyright (c) RxSwiftCommunity
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// Permission is hereby granted, free of charge, to any person obtaining a copy
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// of this software and associated documentation files (the "Software"), to deal
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// in the Software without restriction, including without limitation the rights
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// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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// copies of the Software, and to permit persons to whom the Software is
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// furnished to do so, subject to the following conditions:
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// The above copyright notice and this permission notice shall be included in
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// all copies or substantial portions of the Software.
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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// THE SOFTWARE.
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#if canImport(UIKit)
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import UIKit
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import RxSwift
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import RxCocoa
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public struct TransformGestureRecognizers {
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public let panGesture: UIPanGestureRecognizer
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public let rotationGesture: UIRotationGestureRecognizer
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public let pinchGesture: UIPinchGestureRecognizer
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}
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public struct TransformVelocity {
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let translation: CGPoint
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let rotation: CGFloat
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let scale: CGFloat
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}
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public typealias TransformControlEvent = ControlEvent<TransformGestureRecognizers>
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public typealias TransformObservable = Observable<TransformGestureRecognizers>
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extension Reactive where Base: RxGestureView {
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public func transformGestures() -> TransformControlEvent {
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let source = Observable.combineLatest(panGesture(), rotationGesture(), pinchGesture()) {
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TransformGestureRecognizers(
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panGesture: $0,
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rotationGesture: $1,
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pinchGesture: $2
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)
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}
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return ControlEvent(events: source)
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}
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}
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extension ObservableType where Element == TransformGestureRecognizers {
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public func when(_ states: RxGestureRecognizerState...) -> Observable<Element> {
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filter { gestures in
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states.contains(gestures.panGesture.state)
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|| states.contains(gestures.rotationGesture.state)
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|| states.contains(gestures.pinchGesture.state)
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}
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}
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public func asTransform(in view: TargetView = .view) -> Observable<(transform: CGAffineTransform, velocity: TransformVelocity)> {
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map { gestures in
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let translationView = view.targetView(for: gestures.panGesture)
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let translation = gestures.panGesture.translation(in: translationView)
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let transform = CGAffineTransform.identity
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.rotated(by: gestures.rotationGesture.rotation)
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.scaledBy(x: gestures.pinchGesture.scale, y: gestures.pinchGesture.scale)
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.translatedBy(x: translation.x, y: translation.y)
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let velocity = TransformVelocity(
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translation: gestures.panGesture.velocity(in: translationView),
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rotation: gestures.rotationGesture.velocity,
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scale: gestures.pinchGesture.velocity
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)
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return (transform, velocity)
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}
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}
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}
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#endif
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