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import SwiftUI
struct MapVertices: View {
@Environment(\.colorScheme) var colorScheme
let mapSize: CGSize
let vertexSize: CGSize
let vertices: [Vertex]
let padding = CGFloat(4.0)
var color: MapColor {
MapColor.colorForScheme(colorScheme)
}
var body: some View {
ForEach(vertices, id: \.id) { vertex in
getVertexShape(vertex).fill(color.foreground)
Text(vertex.label).foregroundColor(color.secondary).offset(
CGSize(
width: w(vertex.position.x) + vertexSize.width + padding,
height: h(vertex.position.y)))
}
}
func h(_ dimension: CGFloat) -> CGFloat {
max(0.0, min(mapSize.height, dimension * mapSize.height / 100.0))
}
func w(_ dimension: CGFloat) -> CGFloat {
max(0.0, min(mapSize.width, dimension * mapSize.width / 100.0))
}
func getVertexShape(_ vertex: Vertex) -> Path {
switch vertex.shape {
case .circle:
return Path { path in
path.addEllipse(
in: CGRect(
origin: CGPoint(x: w(vertex.position.x), y: h(vertex.position.y)), size: vertexSize
))
}
case .square:
return Path { path in
path.addRect(
CGRect(
x: w(vertex.position.x), y: h(vertex.position.y), width: vertexSize.width,
height: vertexSize.height
))
}
case .triangle:
return Path { path in
path.move(to: CGPoint(x: w(vertex.position.x), y: h(vertex.position.y) + vertexSize.height))
path.addLine(
to: CGPoint(
x: w(vertex.position.x) + vertexSize.width, y: h(vertex.position.y) + vertexSize.height)
)
path.addLine(
to: CGPoint(x: w(vertex.position.x) + vertexSize.width / 2.0, y: h(vertex.position.y)))
path.addLine(
to: CGPoint(x: w(vertex.position.x), y: h(vertex.position.y) + vertexSize.height))
path.closeSubpath()
}
case .x:
return Path { path in
path.move(to: CGPoint(x: w(vertex.position.x), y: h(vertex.position.y)))
path.addLine(
to: CGPoint(
x: w(vertex.position.x) + vertexSize.width, y: h(vertex.position.y) + vertexSize.height)
)
path.closeSubpath()
path.move(to: CGPoint(x: w(vertex.position.x) + vertexSize.width, y: h(vertex.position.y)))
path.addLine(
to: CGPoint(x: w(vertex.position.x), y: h(vertex.position.y) + vertexSize.height))
path.closeSubpath()
}.strokedPath(StrokeStyle(lineWidth: 5.0, lineCap: .butt))
}
}
}
struct MapVertices_Previews: PreviewProvider {
static var previews: some View {
MapVertices(
mapSize: CGSize(width: 400.0, height: 400.0), vertexSize: CGSize(width: 25.0, height: 25.0),
vertices: [
Vertex(id: 0, label: "A", position: CGPoint(x: 50.0, y: 50.0)),
Vertex(id: 0, label: "A", position: CGPoint(x: 10.0, y: 20.0)),
])
}
}
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