117 lines
4.3 KiB
Swift
117 lines
4.3 KiB
Swift
//
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// Copyright (c) 2019 Open Whisper Systems. All rights reserved.
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//
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import Foundation
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@objc
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public protocol DisappearingTimerConfigurationViewDelegate: class {
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func disappearingTimerConfigurationViewWasTapped(_ disappearingTimerView: DisappearingTimerConfigurationView)
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}
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// DisappearingTimerConfigurationView shows a timer icon and a short label showing the duration
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// of disappearing messages for a thread.
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//
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// If you assign a delegate, it behaves like a button.
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@objc
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public class DisappearingTimerConfigurationView: UIView {
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@objc
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public weak var delegate: DisappearingTimerConfigurationViewDelegate? {
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didSet {
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// gesture recognizer is only enabled when a delegate is assigned.
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// This lets us use this view as either an interactive button
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// or as a non-interactive status indicator
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pressGesture.isEnabled = delegate != nil
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}
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}
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private let imageView: UIImageView
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private let label: UILabel
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private var pressGesture: UILongPressGestureRecognizer!
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public required init?(coder aDecoder: NSCoder) {
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notImplemented()
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}
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@objc
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public init(durationSeconds: UInt32) {
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self.imageView = UIImageView(image: #imageLiteral(resourceName: "ic_timer"))
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imageView.contentMode = .scaleAspectFit
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self.label = UILabel()
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label.text = NSString.formatDurationSeconds(durationSeconds, useShortFormat: true)
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label.font = UIFont.systemFont(ofSize: 10)
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label.textAlignment = .center
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label.minimumScaleFactor = 0.5
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super.init(frame: CGRect.zero)
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applyTintColor(self.tintColor)
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// Gesture, simulating button touch up inside
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let gesture = UILongPressGestureRecognizer(target: self, action: #selector(pressHandler))
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gesture.minimumPressDuration = 0
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self.pressGesture = gesture
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self.addGestureRecognizer(pressGesture)
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// disable gesture recognizer until a delegate is assigned
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// this lets us use the UI as either an interactive button
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// or as a non-interactive status indicator
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pressGesture.isEnabled = false
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// Accessibility
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self.accessibilityLabel = NSLocalizedString("DISAPPEARING_MESSAGES_LABEL", comment: "Accessibility label for disappearing messages")
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let hintFormatString = NSLocalizedString("DISAPPEARING_MESSAGES_HINT", comment: "Accessibility hint that contains current timeout information")
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let durationString = NSString.formatDurationSeconds(durationSeconds, useShortFormat: false)
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self.accessibilityHint = String(format: hintFormatString, durationString)
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// Layout
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self.addSubview(imageView)
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self.addSubview(label)
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let kHorizontalPadding: CGFloat = 4
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let kVerticalPadding: CGFloat = 6
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imageView.autoPinEdgesToSuperviewEdges(with: UIEdgeInsets(top: kVerticalPadding, left: kHorizontalPadding, bottom: 0, right: kHorizontalPadding), excludingEdge: .bottom)
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label.autoPinEdgesToSuperviewEdges(with: UIEdgeInsets(top: 0, left: kHorizontalPadding, bottom: kVerticalPadding, right: kHorizontalPadding), excludingEdge: .top)
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label.autoPinEdge(.top, to: .bottom, of: imageView)
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}
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@objc
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func pressHandler(_ gestureRecognizer: UILongPressGestureRecognizer) {
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Logger.verbose("")
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// handle touch down and touch up events separately
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if gestureRecognizer.state == .began {
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applyTintColor(UIColor.gray)
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} else if gestureRecognizer.state == .ended {
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applyTintColor(self.tintColor)
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let location = gestureRecognizer.location(in: self)
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let isTouchUpInside = self.bounds.contains(location)
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if (isTouchUpInside) {
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// Similar to a UIButton's touch-up-inside
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self.delegate?.disappearingTimerConfigurationViewWasTapped(self)
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} else {
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// Similar to a UIButton's touch-up-outside
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// cancel gesture
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gestureRecognizer.isEnabled = false
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gestureRecognizer.isEnabled = true
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}
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}
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}
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override public var tintColor: UIColor! {
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didSet {
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applyTintColor(tintColor)
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}
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}
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private func applyTintColor(_ color: UIColor) {
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imageView.tintColor = color
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label.textColor = color
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}
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}
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