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

   1 import SwiftUI
   2
   3 struct MapVertices: View {
   4
   5   @Environment(\.colorScheme) var colorScheme
   6
   7   let mapSize: CGSize
   8   let vertexSize: CGSize
   9   let vertices: [Vertex]
  10   let padding = CGFloat(4.0)
  11
  12   var color: MapColor {
  13     MapColor.colorForScheme(colorScheme)
  14   }
  15
  16   var body: some View {
  17     ForEach(vertices, id: \.id) { vertex in
  18       getVertexShape(vertex).fill(color.foreground)
  19       Text(vertex.label).foregroundColor(color.secondary).offset(
  20         CGSize(
  21           width: w(vertex.position.x) + vertexSize.width + padding,
  22           height: h(vertex.position.y)))
  23     }
  24   }
  25
  26   func h(_ dimension: CGFloat) -> CGFloat {
  27     max(0.0, min(mapSize.height, dimension * mapSize.height / 100.0))
  28   }
  29
  30   func w(_ dimension: CGFloat) -> CGFloat {
  31     max(0.0, min(mapSize.width, dimension * mapSize.width / 100.0))
  32   }
  33
  34   func getVertexShape(_ vertex: Vertex) -> Path {
  35     switch vertex.shape {
  36     case .circle:
  37       return Path { path in
  38         path.addEllipse(
  39           in: CGRect(
  40             origin: CGPoint(x: w(vertex.position.x), y: h(vertex.position.y)), size: vertexSize
  41           ))
  42       }
  43     case .square:
  44       return Path { path in
  45         path.addRect(
  46           CGRect(
  47             x: w(vertex.position.x), y: h(vertex.position.y), width: vertexSize.width,
  48             height: vertexSize.height
  49           ))
  50       }
  51     case .triangle:
  52       return Path { path in
  53         path.move(to: CGPoint(x: w(vertex.position.x), y: h(vertex.position.y) + vertexSize.height))
  54         path.addLine(
  55           to: CGPoint(
  56             x: w(vertex.position.x) + vertexSize.width, y: h(vertex.position.y) + vertexSize.height)
  57         )
  58         path.addLine(
  59           to: CGPoint(x: w(vertex.position.x) + vertexSize.width / 2.0, y: h(vertex.position.y)))
  60         path.addLine(
  61           to: CGPoint(x: w(vertex.position.x), y: h(vertex.position.y) + vertexSize.height))
  62         path.closeSubpath()
  63       }
  64     case .x:
  65       return Path { path in
  66         path.move(to: CGPoint(x: w(vertex.position.x), y: h(vertex.position.y)))
  67         path.addLine(
  68           to: CGPoint(
  69             x: w(vertex.position.x) + vertexSize.width, y: h(vertex.position.y) + vertexSize.height)
  70         )
  71         path.closeSubpath()
  72         path.move(to: CGPoint(x: w(vertex.position.x) + vertexSize.width, y: h(vertex.position.y)))
  73         path.addLine(
  74           to: CGPoint(x: w(vertex.position.x), y: h(vertex.position.y) + vertexSize.height))
  75         path.closeSubpath()
  76       }.strokedPath(StrokeStyle(lineWidth: 5.0, lineCap: .butt))
  77     }
  78   }
  79 }
  80
  81 struct MapVertices_Previews: PreviewProvider {
  82   static var previews: some View {
  83     MapVertices(
  84       mapSize: CGSize(width: 400.0, height: 400.0), vertexSize: CGSize(width: 25.0, height: 25.0),
  85       vertices: [
  86         Vertex(id: 0, label: "A", position: CGPoint(x: 50.0, y: 50.0)),
  87         Vertex(id: 0, label: "A", position: CGPoint(x: 10.0, y: 20.0)),
  88       ])
  89   }
  90 }