Digital ACT-191 ONEAPP-6830 story: Implementation for scroll thumb on given position value
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vasavk
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@ -44,11 +44,12 @@ open class CarouselScrollbar: View {
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_numberOfSlides = 1
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}
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setThumbWidth()
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setThumb(position)
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setNeedsUpdate()
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}
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}
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/// The amount of slides visible in the carousel container at one time.
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/// The number of slides that can appear at once in a set in a carousel container.
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open var selectedLayout: Layout? {
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get { return _selectedLayout }
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set {
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@ -58,11 +59,12 @@ open class CarouselScrollbar: View {
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_selectedLayout = .oneUP
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}
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setThumbWidth()
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setThumb(position)
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setNeedsUpdate()
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}
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}
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/// Enum used to describe the amount of slides visible in the carousel container at one time.
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/// Enum used to describe the number of slides that can appear at once in a set in a carousel container.
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public enum Layout: String, CaseIterable {
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case oneUP = "1UP"
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case twoUP = "2UP"
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@ -93,7 +95,19 @@ open class CarouselScrollbar: View {
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}
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/// Used to set the position of the thumb(scrubber). This is used when the carousel container changes position, it will align the position of thumb(scrubber).
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open var position: Int? { didSet { setNeedsUpdate() } }
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open var position: Int? {
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get { return _position }
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set {
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if let newValue {
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checkPositions()
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_position = (newValue > totalPositions ?? 1) ? totalPositions : newValue
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} else {
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_position = 1
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}
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setThumb(position)
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setNeedsUpdate()
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}
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}
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/// Allows a unique id to be passed into the thumb and track of the thumb(scrubber).
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open var scrubberId: Int? { didSet { setNeedsUpdate() } }
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@ -107,7 +121,9 @@ open class CarouselScrollbar: View {
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internal var _selectedLayout: Layout = .oneUP
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internal var _numberOfSlides: Int? = 1
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internal var heightConstraint: NSLayoutConstraint?
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internal var totalPositions: Int? = 1
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internal var _position: Int? = 1
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private let trackViewWidth = 96
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private let trackViewHeight: CGFloat = 4
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private let minThumbWidth: Float = 16.0
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@ -179,7 +195,7 @@ open class CarouselScrollbar: View {
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leftActiveOverlay.frame = CGRectMake(trackView.frame.origin.x, 20, CGFloat(trackViewWidth), trackViewHeight)
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leftActiveOverlay.isUserInteractionEnabled = true
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leftActiveOverlay.layer.cornerRadius = cornerRadius
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let leftPressRecognizer = UILongPressGestureRecognizer(target: self, action: #selector(self.leftLongPressed(_:)))
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let leftPressRecognizer = UILongPressGestureRecognizer(target: self, action: #selector(self.onThumbTouchStart(_:)))
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leftPressRecognizer.minimumPressDuration = 0
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leftActiveOverlay.addGestureRecognizer(leftPressRecognizer)
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addSubview(leftActiveOverlay)
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@ -188,7 +204,7 @@ open class CarouselScrollbar: View {
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rightActiveOverlay.frame = CGRectMake(thumbView.frame.origin.x + thumbView.frame.size.width, 20, CGFloat(trackViewWidth), trackViewHeight)
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rightActiveOverlay.isUserInteractionEnabled = true
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rightActiveOverlay.layer.cornerRadius = cornerRadius
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let rightPressRecognizer = UILongPressGestureRecognizer(target: self, action: #selector(self.rightLongPressed(_:)))
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let rightPressRecognizer = UILongPressGestureRecognizer(target: self, action: #selector(self.onThumbTouchEnd(_:)))
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rightPressRecognizer.minimumPressDuration = 0
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rightActiveOverlay.addGestureRecognizer(rightPressRecognizer)
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addSubview(rightActiveOverlay)
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@ -198,7 +214,7 @@ open class CarouselScrollbar: View {
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thumbView.layer.cornerRadius = cornerRadius
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thumbView.addGestureRecognizer(UIPanGestureRecognizer(target: self, action:(#selector(self.handleGesture(_:)))))
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addSubview(thumbView)
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updateActiveOverlayFrames()
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updateActiveOverlays()
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}
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open override func updateView() {
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@ -223,17 +239,16 @@ open class CarouselScrollbar: View {
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//--------------------------------------------------
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// MARK: - Private Methods
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//--------------------------------------------------
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func updateThumbViewToLeft() {
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func onMoveBackward() {
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thumbView.frame.origin.x = thumbView.frame.origin.x - CGFloat(actualThumbWidth)
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updateActiveOverlayFrames()
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updateActiveOverlays()
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}
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func updateThumbViewToRight() {
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func onMoveForward() {
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thumbView.frame.origin.x = thumbView.frame.origin.x + CGFloat(actualThumbWidth)
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updateActiveOverlayFrames()
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updateActiveOverlays()
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}
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//TO DO: Drag functionality pending
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@objc func handleGesture(_ sender: UIPanGestureRecognizer) {
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switch sender.state {
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@ -254,7 +269,7 @@ open class CarouselScrollbar: View {
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}
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}
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@objc func leftLongPressed(_ gesture: UILongPressGestureRecognizer) {
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@objc func onThumbTouchStart(_ gesture: UILongPressGestureRecognizer) {
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if gesture.state == .began {
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leftActiveOverlay.backgroundColor = activeOverlayColorConfiguration.getColor(self)
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leftActiveOverlay.layer.opacity = activeOpacity
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@ -265,12 +280,12 @@ open class CarouselScrollbar: View {
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leftActiveOverlay.backgroundColor = .clear
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leftActiveOverlay.layer.opacity = defaultOpacity
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DispatchQueue.main.asyncAfter(deadline: .now() + .milliseconds(100)) { [weak self] in
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self?.updateThumbViewToLeft()
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self?.onMoveBackward()
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}
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}
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}
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@objc func rightLongPressed(_ gesture: UILongPressGestureRecognizer) {
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@objc func onThumbTouchEnd(_ gesture: UILongPressGestureRecognizer) {
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if gesture.state == .began {
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rightActiveOverlay.backgroundColor = activeOverlayColorConfiguration.getColor(self)
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rightActiveOverlay.layer.opacity = activeOpacity
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@ -281,21 +296,22 @@ open class CarouselScrollbar: View {
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rightActiveOverlay.backgroundColor = .clear
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rightActiveOverlay.layer.opacity = defaultOpacity
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DispatchQueue.main.asyncAfter(deadline: .now() + .milliseconds(100)) { [weak self] in
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self?.updateThumbViewToRight()
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self?.onMoveForward()
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}
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}
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}
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private func setThumbWidth() {
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let width = Float (trackViewWidth / (numberOfSlides ?? 1) * _selectedLayout.value)
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let width = (Float(trackViewWidth) / Float(numberOfSlides ?? 1)) * Float(_selectedLayout.value)
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actualThumbWidth = (width > Float(trackViewWidth)) ? Float(trackViewWidth) : width
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thumbWidth = (width <= Float(trackViewWidth) && width > minThumbWidth) ? width : ((width > Float(trackViewWidth)) ? Float(trackViewWidth) : minThumbWidth)
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thumbView.frame.size.width = CGFloat(thumbWidth)
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thumbView.frame.origin.x = trackView.frame.origin.x
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updateActiveOverlayFrames()
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checkPositions()
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updateActiveOverlays()
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}
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private func updateActiveOverlayFrames() {
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private func updateActiveOverlays() {
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// adjusting thumb position if it goes beyond trackView.
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let thumbPosition = thumbView.frame.origin.x + thumbView.frame.size.width
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let trackPosition = trackView.frame.origin.x + trackView.frame.size.width
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@ -303,7 +319,7 @@ open class CarouselScrollbar: View {
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thumbView.frame.origin.x = trackPosition - thumbView.frame.size.width
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} else if thumbView.frame.origin.x < trackView.frame.origin.x {
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thumbView.frame.origin.x = trackView.frame.origin.x
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}
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}
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//left active overlay position update
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leftActiveOverlay.frame.size.width = thumbView.frame.origin.x - trackView.frame.origin.x + cornerRadius
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@ -312,6 +328,15 @@ open class CarouselScrollbar: View {
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rightActiveOverlay.frame.origin.x = thumbView.frame.origin.x + thumbView.frame.size.width - cornerRadius
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rightActiveOverlay.frame.size.width = (trackView.frame.origin.x + trackView.frame.size.width) - (thumbView.frame.origin.x + thumbView.frame.size.width) + cornerRadius
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}
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private func checkPositions() {
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totalPositions = Int (ceil (Double(numberOfSlides ?? 1) / Double(_selectedLayout.value)))
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}
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private func setThumb(_ position: Int?) {
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thumbView.frame.origin.x = CGFloat(Float((position ?? 1) - 1) * actualThumbWidth) + trackView.frame.origin.x
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updateActiveOverlays()
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}
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}
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