git.r.bdr.sh - rbdr/map/blob - Map/MapRenderComponents/MapStages.swift

   1 import SwiftUI
   2
   3 struct MapStages: View {
   4
   5   @Environment(\.colorScheme) var colorScheme
   6
   7   let mapSize: CGSize
   8   let lineWidth: CGFloat
   9   let stages: [CGFloat]
  10   let opacity = 0.1
  11
  12   var color: MapColor {
  13     MapColor.colorForScheme(colorScheme)
  14   }
  15
  16   var body: some View {
  17
  18     ZStack(alignment: .topLeading) {
  19       Path { path in
  20         path.addRect(CGRect(x: 0, y: 0, width: w(stages[0]), height: mapSize.height))
  21       }.fill(color.stages.i)
  22       Path { path in
  23         path.addRect(
  24           CGRect(x: w(stages[0]), y: 0, width: w(stages[1]) - w(stages[0]), height: mapSize.height))
  25       }.fill(color.stages.ii)
  26       Path { path in
  27         path.addRect(
  28           CGRect(x: w(stages[1]), y: 0, width: w(stages[2]) - w(stages[1]), height: mapSize.height))
  29       }.fill(color.stages.iii)
  30       Path { path in
  31         path.addRect(
  32           CGRect(x: w(stages[2]), y: 0, width: mapSize.width - w(stages[2]), height: mapSize.height)
  33         )
  34       }.fill(color.stages.iv)
  35
  36       Path { path in
  37         path.move(to: CGPoint(x: w(stages[0]), y: 0))
  38         path.addLine(to: CGPoint(x: w(stages[0]), y: mapSize.height))
  39         path.move(to: CGPoint(x: w(stages[1]), y: 0))
  40         path.addLine(to: CGPoint(x: w(stages[1]), y: mapSize.height))
  41         path.move(to: CGPoint(x: w(stages[2]), y: 0))
  42         path.addLine(to: CGPoint(x: w(stages[2]), y: mapSize.height))
  43         path.move(to: CGPoint(x: w(stages[0]), y: 0))
  44         path.closeSubpath()
  45       }.strokedPath(StrokeStyle(lineWidth: lineWidth, dash: [10.0])).stroke(color.foreground)
  46     }
  47   }
  48
  49   func w(_ dimension: CGFloat) -> CGFloat {
  50     max(0.0, min(mapSize.width, dimension * mapSize.width / 100.0))
  51   }
  52 }
  53
  54 struct MapStages_Previews: PreviewProvider {
  55   static var previews: some View {
  56     MapStages(
  57       mapSize: CGSize(width: 200.0, height: 200.0), lineWidth: CGFloat(1.0),
  58       stages: [25.0, 50.0, 75.0])
  59   }
  60 }