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136 lines
4.3 KiB
136 lines
4.3 KiB
#if canImport(UIKit)
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import UIKit.UIGestureRecognizerSubclass
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import RxSwift
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import RxCocoa
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public class TouchDownGestureRecognizer: UIGestureRecognizer {
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public override init(target: Any?, action: Selector?) {
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super.init(target: target, action: action)
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trigger
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.flatMapFirst { [unowned self] _ -> Observable<Void> in
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let trigger = Observable.just(())
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guard self.state == .possible else {
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return trigger
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}
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return trigger.delay(
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.milliseconds(Int(self.minimumTouchDuration * 1000)),
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scheduler: MainScheduler.instance
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)
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}
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.subscribe(onNext: { [unowned self] _ in
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self.touches = self._touches
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})
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.disposed(by: triggerDisposeBag)
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}
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public var minimumTouchDuration: TimeInterval = 0
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/**
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When set to `false`, it allows to bypass the touch ignoring mechanism in order to get absolutely all touch down events.
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Defaults to `true`.
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- note: See [ignore(_ touch: UITouch, for event: UIEvent)](https://developer.apple.com/documentation/uikit/uigesturerecognizer/1620010-ignore)
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*/
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public var isTouchIgnoringEnabled: Bool = true
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@nonobjc public var touches: Set<UITouch> = [] {
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didSet {
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if touches.isEmpty {
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if state == .possible {
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state = .cancelled
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} else {
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state = .ended
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}
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} else {
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if state == .possible {
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state = .began
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} else {
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state = .changed
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}
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}
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}
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}
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public override func touchesBegan(_ touches: Set<UITouch>, with event: UIEvent) {
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super.touchesBegan(touches, with: event)
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setTouches(from: event)
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}
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public override func touchesMoved(_ touches: Set<UITouch>, with event: UIEvent) {
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super.touchesMoved(touches, with: event)
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setTouches(from: event)
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}
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public override func touchesEnded(_ touches: Set<UITouch>, with event: UIEvent) {
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super.touchesEnded(touches, with: event)
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setTouches(from: event)
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}
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public override func touchesCancelled(_ touches: Set<UITouch>, with event: UIEvent) {
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super.touchesCancelled(touches, with: event)
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setTouches(from: event)
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}
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private let triggerDisposeBag = DisposeBag()
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private let trigger = PublishSubject<Void>()
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private var _touches: Set<UITouch> = []
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private func setTouches(from event: UIEvent) {
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_touches = (event.allTouches ?? []).filter { touch in
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[.began, .stationary, .moved].contains(touch.phase)
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}
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trigger.onNext(())
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}
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public override func reset() {
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super.reset()
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touches = []
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}
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public override func ignore(_ touch: UITouch, for event: UIEvent) {
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guard isTouchIgnoringEnabled else {
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return
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}
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super.ignore(touch, for: event)
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}
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}
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public typealias TouchDownConfiguration = Configuration<TouchDownGestureRecognizer>
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public typealias TouchDownControlEvent = ControlEvent<TouchDownGestureRecognizer>
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public typealias TouchDownObservable = Observable<TouchDownGestureRecognizer>
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extension Factory where Gesture == RxGestureRecognizer {
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/**
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Returns an `AnyFactory` for `TouchDownGestureRecognizer`
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- parameter configuration: A closure that allows to fully configure the gesture recognizer
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*/
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public static func touchDown(configuration: TouchDownConfiguration? = nil) -> AnyFactory {
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make(configuration: configuration).abstracted()
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}
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}
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extension Reactive where Base: RxGestureView {
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/**
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Returns an observable `TouchDownGestureRecognizer` events sequence
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- parameter configuration: A closure that allows to fully configure the gesture recognizer
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*/
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public func touchDownGesture(configuration: TouchDownConfiguration? = nil) -> TouchDownControlEvent {
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gesture(make(configuration: configuration))
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}
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}
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extension ObservableType where Element: TouchDownGestureRecognizer {
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/**
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Maps the observable `GestureRecognizer` events sequence to an observable sequence of force values.
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*/
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public func asTouches() -> Observable<Set<UITouch>> {
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self.map { $0.touches }
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}
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}
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#endif
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