git.r.bdr.sh - rbdr/map/blob - Map/Presentation/MapEditor.swift

   1 import SwiftUI
   2
   3 struct MapEditor: View {
   4   @Binding var document: MapDocument
   5   var url: URL?
   6   @State var selectedEvolution: StageType = .behavior
   7
   8   @AppStorage("viewStyle") var viewStyle: ViewStyle = .horizontal
   9
  10   let zoomRange = Constants.kMinZoom...Constants.kMaxZoom
  11   @AppStorage("zoom") var zoom = 1.0
  12   @State var lastZoom = 1.0
  13
  14   var body: some View {
  15     VStack(spacing: 0) {
  16       adaptiveStack {
  17         ZStack(alignment: .topLeading) {
  18           MapTextEditor(document: $document)
  19             .background(Color.ui.background)
  20             .foregroundColor(Color.ui.foreground)
  21             .frame(minHeight: 96.0)
  22         }.padding(.top, 8.0).padding(.leading, 8.0).background(Color.ui.background).cornerRadius(
  23           5.0)
  24         GeometryReader { geometry in
  25           ScrollView([.horizontal, .vertical]) {
  26             MapRenderView(
  27               document: $document, evolution: $selectedEvolution, onDragVertex: onDragVertex
  28             ).scaleEffect(zoom, anchor: .center).frame(
  29               width: (Dimensions.mapSize.width + 2 * Dimensions.mapPadding) * zoom,
  30               height: (Dimensions.mapSize.height + 2 * Dimensions.mapPadding) * zoom)
  31           }.background(Color.ui.background)
  32             .gesture(
  33               MagnificationGesture()
  34                 .onChanged { value in
  35                   let delta = value / lastZoom
  36                   lastZoom = value
  37                   zoom = min(max(zoom * delta, zoomRange.lowerBound), zoomRange.upperBound)
  38                 }
  39                 .onEnded { _ in
  40                   lastZoom = 1.0
  41                 }
  42             )
  43         }
  44       }
  45       Divider()
  46       HStack {
  47         Spacer()
  48         Slider(
  49           value: $zoom, in: zoomRange, step: 0.1,
  50           label: {
  51             Text(formatZoom(zoom))
  52               .font(.theme.smallControl)
  53           },
  54           minimumValueLabel: {
  55             Image(systemName: "minus.magnifyingglass")
  56               .font(.theme.smallControl)
  57               .help("Zoom Out (⌘-)")
  58           },
  59           maximumValueLabel: {
  60             Image(systemName: "plus.magnifyingglass")
  61               .font(.theme.smallControl)
  62               .help("Zoom In (⌘+)")
  63           }
  64         ).frame(width: 200).padding(.trailing, 10.0)
  65       }.padding(4.0)
  66     }.toolbar {
  67       HStack {
  68         Button(action: saveImage) {
  69           Image(systemName: "photo")
  70         }
  71         .help("Export Image (⌘E)")
  72         .padding(.vertical, 4.0).padding(.leading, 4.0).padding(.trailing, 8.0)
  73       }
  74       EvolutionPicker(selectedEvolution: $selectedEvolution)
  75     }
  76   }
  77
  78   @ViewBuilder
  79   func adaptiveStack<Content: View>(@ViewBuilder content: () -> Content) -> some View {
  80     if viewStyle == .horizontal {
  81       VSplitView {
  82         content()
  83       }
  84     } else {
  85       HSplitView {
  86         content()
  87       }
  88     }
  89   }
  90
  91   private func formatZoom(_ number: CGFloat) -> String {
  92     let formatter = NumberFormatter()
  93     formatter.numberStyle = .decimal
  94     formatter.maximumFractionDigits = 1
  95     formatter.minimumFractionDigits = 1
  96     return (formatter.string(from: NSNumber(value: number)) ?? "") + "x"
  97   }
  98
  99   private func onDragVertex(vertex: Vertex, x: CGFloat, y: CGFloat) {
 100   }
 101
 102   private func saveImage() {
 103     if let image = document.exportAsImage(withEvolution: selectedEvolution) {
 104
 105       let filename = url?.deletingPathExtension().lastPathComponent ?? "Untitled"
 106
 107       let savePanel = NSSavePanel()
 108       savePanel.allowedContentTypes = [.png]
 109       savePanel.canCreateDirectories = true
 110       savePanel.isExtensionHidden = false
 111       savePanel.title = "Save \(filename) as image"
 112       savePanel.message = "Choose a location to save the image"
 113       savePanel.nameFieldStringValue = "\(filename).png"
 114       savePanel.begin { result in
 115         if result == .OK, let url = savePanel.url {
 116           if let tiffRepresentation = image.tiffRepresentation {
 117             let bitmapImage = NSBitmapImageRep(data: tiffRepresentation)
 118             let pngData = bitmapImage?.representation(using: .png, properties: [:])
 119             do {
 120               try pngData?.write(to: url)
 121             } catch {
 122               return
 123             }
 124           }
 125         }
 126       }
 127     }
 128   }
 129 }
 130
 131 #Preview {
 132   MapEditor(document: .constant(MapDocument()), url: URL(filePath: "test.png")!)
 133 }