139 lines
3.7 KiB
Swift
139 lines
3.7 KiB
Swift
//
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// Copyright 2021-2024 New Vector Ltd.
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//
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// SPDX-License-Identifier: AGPL-3.0-only
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// Please see LICENSE in the repository root for full details.
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//
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import UIKit
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@IBDesignable
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@objcMembers
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class CircleProgressView: MXKPieChartView {
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// MARK: - Constants
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private static let minStrokeEnd: CGFloat = 0.000000000001
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private static let maxStrokeEnd: CGFloat = 1
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// MARK: - Public properties
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@IBInspectable var lineColor: UIColor = .lightGray {
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didSet {
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shapeLayer?.strokeColor = lineColor.cgColor
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}
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}
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@IBInspectable var lineWidth: CGFloat = 2 {
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didSet {
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shapeLayer?.lineWidth = lineWidth
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}
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}
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var value: CGFloat = 0 {
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didSet {
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stopAnimating()
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strokeEnd = max(min(value, CircleProgressView.maxStrokeEnd), CircleProgressView.minStrokeEnd)
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}
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}
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override var progress: CGFloat {
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get {
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return value
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}
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set {
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value = newValue
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}
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}
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// MARK: - Private members
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private weak var shapeLayer: CAShapeLayer?
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private var strokeEnd: CGFloat = minStrokeEnd {
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didSet {
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shapeLayer?.strokeEnd = strokeEnd
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}
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}
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private var startAngle: CGFloat = -.pi/2
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private(set) var isAnimating = false
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// MARK: - Lifecycle
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required init?(coder: NSCoder) {
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super.init(coder: coder)
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initLayer()
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initPath()
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}
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override init(frame: CGRect) {
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super.init(frame: frame)
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initLayer()
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initPath()
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}
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override func layoutSubviews() {
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super.layoutSubviews()
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shapeLayer?.frame = self.layer.bounds
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initPath()
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}
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// MARK: - Interface Builder
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override func prepareForInterfaceBuilder() {
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value = 0.8
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}
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// MARK: - Animation management
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func startAnimating() {
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guard !isAnimating else {
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return
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}
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isAnimating = true
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let rotationAnimation = CABasicAnimation(keyPath: "transform.rotation.z")
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rotationAnimation.fromValue = CGFloat.pi / 2
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rotationAnimation.toValue = CGFloat.pi * 2.5
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rotationAnimation.repeatCount = .infinity
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rotationAnimation.duration = 2
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shapeLayer?.add(rotationAnimation, forKey: "rotationAnimation")
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let strokeAnimation = CABasicAnimation(keyPath: "strokeEnd")
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strokeAnimation.fromValue = 0
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strokeAnimation.toValue = 0.9
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strokeAnimation.repeatCount = .infinity
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strokeAnimation.duration = 0.9
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strokeAnimation.autoreverses = true
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strokeAnimation.timingFunction = CAMediaTimingFunction(name: .easeInEaseOut)
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shapeLayer?.add(strokeAnimation, forKey: "path")
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}
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func stopAnimating() {
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guard isAnimating else {
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return
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}
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shapeLayer?.removeAllAnimations()
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isAnimating = false
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}
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// MARK: - Private methods
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private func initLayer() {
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let layer = CAShapeLayer()
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layer.fillColor = UIColor.clear.cgColor
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layer.strokeColor = lineColor.cgColor
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layer.lineCap = .round
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layer.lineWidth = lineWidth
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layer.allowsEdgeAntialiasing = true
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layer.strokeEnd = strokeEnd
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self.layer.insertSublayer(layer, at: 0)
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shapeLayer = layer
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}
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private func initPath() {
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let endAngle: CGFloat = startAngle + .pi * 2
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let path = UIBezierPath(arcCenter: CGPoint(x: self.bounds.midX, y: self.bounds.midY), radius: (self.bounds.width - lineWidth) / 2, startAngle: startAngle, endAngle: endAngle, clockwise: true)
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shapeLayer?.path = path.cgPath
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}
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}
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