session-ios/Session/Media Viewing & Editing/AudioProgressView.swift
2021-01-12 11:05:52 +11:00

99 lines
2.9 KiB
Swift

//
// Copyright (c) 2018 Open Whisper Systems. All rights reserved.
//
import UIKit
import SignalUtilitiesKit
@objc public class AudioProgressView: UIView {
@objc public override var bounds: CGRect {
didSet {
if oldValue != bounds {
updateSubviews()
}
}
}
@objc public override var frame: CGRect {
didSet {
if oldValue != frame {
updateSubviews()
}
}
}
@objc public var horizontalBarColor = UIColor.black {
didSet {
updateContent()
}
}
@objc public var progressColor = UIColor.blue {
didSet {
updateContent()
}
}
private let horizontalBarLayer: CAShapeLayer
private let progressLayer: CAShapeLayer
@objc public var progress: CGFloat = 0 {
didSet {
if oldValue != progress {
updateContent()
}
}
}
@available(*, unavailable, message:"use other constructor instead.")
@objc public required init?(coder aDecoder: NSCoder) {
notImplemented()
}
public required init() {
self.horizontalBarLayer = CAShapeLayer()
self.progressLayer = CAShapeLayer()
super.init(frame: CGRect.zero)
self.layer.addSublayer(self.horizontalBarLayer)
self.layer.addSublayer(self.progressLayer)
}
internal func updateSubviews() {
AssertIsOnMainThread()
self.horizontalBarLayer.frame = self.bounds
self.progressLayer.frame = self.bounds
updateContent()
}
internal func updateContent() {
AssertIsOnMainThread()
// Prevent the shape layer from animating changes.
CATransaction.begin()
CATransaction.setDisableActions(true)
let horizontalBarPath = UIBezierPath()
let horizontalBarHeightFraction = CGFloat(0.25)
let horizontalBarHeight = bounds.size.height * horizontalBarHeightFraction
horizontalBarPath.append(UIBezierPath(rect: CGRect(x: 0, y: (bounds.size.height - horizontalBarHeight) * 0.5, width: bounds.size.width, height: horizontalBarHeight)))
horizontalBarLayer.path = horizontalBarPath.cgPath
horizontalBarLayer.fillColor = horizontalBarColor.cgColor
let progressHeight = bounds.self.height
let progressWidth = progressHeight * 0.15
let progressX = (bounds.self.width - progressWidth) * max(0.0, min(1.0, progress))
let progressBounds = CGRect(x: progressX, y: 0, width: progressWidth, height: progressHeight)
let progressCornerRadius = progressWidth * 0.5
let progressPath = UIBezierPath()
progressPath.append(UIBezierPath(roundedRect: progressBounds, cornerRadius: progressCornerRadius))
progressLayer.path = progressPath.cgPath
progressLayer.fillColor = progressColor.cgColor
CATransaction.commit()
}
}