CakeView.swift

//
//  CircularProgress.swift
//  Time!
//
//  Created by Eric Lewis on 6/9/19.
//  Copyright © 2019 Eric Lewis, Inc. All rights reserved.
//

import SwiftUI

struct CakeView: View {
  @Binding var percent: TimeInterval;
  
  init(_ percent: Binding<TimeInterval>) {
    $percent = percent
  }
  
  var body: some View {
    ZStack {
      Circle().stroke(Color.blue, lineWidth: 2)
      GeometryReader { geometry in
        Path { path in
          let width: CGFloat = min(geometry.size.width, geometry.size.height)
          let height = width
          let middle = width / 2.0
          path.move(
            to: CGPoint(
              x: middle,
              y: height * 0.5
            )
          )
          let middlePoint = CGPoint(
            x: middle,
            y: height * 0.5
          )
          path.addArc(center: middlePoint, radius: width * 0.45, startAngle: .degrees(-90), endAngle: .degrees(-90 + (3.6 * self.percent)), clockwise: false)
          path.addLine(to: middlePoint)
          path.closeSubpath()
          }
          .fill(Color.blue)
          .aspectRatio(1, contentMode: .fit)
        }
      }
    }
  }