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import SwiftUI
struct MapEditor: View {
@Binding var document: MapDocument
var url: URL?
@State var selectedEvolution: StageType = .behavior
@AppStorage("viewStyle") var viewStyle: ViewStyle = .horizontal
let zoomRange = Constants.kMinZoom...Constants.kMaxZoom
@AppStorage("zoom") var zoom = 1.0
@State var lastZoom = 1.0
var body: some View {
VStack(spacing: 0) {
adaptiveStack {
ZStack(alignment: .topLeading) {
MapTextEditor(document: $document)
.background(Color.ui.background)
.foregroundColor(Color.ui.foreground)
.frame(minHeight: 96.0)
}.padding(.top, 8.0).padding(.leading, 8.0).background(Color.ui.background).cornerRadius(
5.0)
GeometryReader { geometry in
ScrollView([.horizontal, .vertical]) {
MapRenderView(
document: $document, evolution: $selectedEvolution, onDragVertex: onDragVertex
).scaleEffect(zoom, anchor: .center).frame(
width: (Dimensions.mapSize.width + 2 * Dimensions.mapPadding) * zoom,
height: (Dimensions.mapSize.height + 2 * Dimensions.mapPadding) * zoom)
}.background(Color.ui.background)
.gesture(
MagnificationGesture()
.onChanged { value in
let delta = value / lastZoom
lastZoom = value
zoom = min(max(zoom * delta, zoomRange.lowerBound), zoomRange.upperBound)
}
.onEnded { _ in
lastZoom = 1.0
}
)
}
}
Divider()
HStack {
Spacer()
Slider(
value: $zoom, in: zoomRange, step: 0.1,
label: {
Text(formatZoom(zoom))
.font(.theme.smallControl)
},
minimumValueLabel: {
Image(systemName: "minus.magnifyingglass")
.font(.theme.smallControl)
.help("Zoom Out (⌘-)")
},
maximumValueLabel: {
Image(systemName: "plus.magnifyingglass")
.font(.theme.smallControl)
.help("Zoom In (⌘+)")
}
).frame(width: 200).padding(.trailing, 10.0)
}.padding(4.0)
}.toolbar {
HStack {
Button(action: saveImage) {
Image(systemName: "photo")
}
.help("Export Image (⌘E)")
.padding(.vertical, 4.0).padding(.leading, 4.0).padding(.trailing, 8.0)
}
EvolutionPicker(selectedEvolution: $selectedEvolution)
}
}
@ViewBuilder
func adaptiveStack<Content: View>(@ViewBuilder content: () -> Content) -> some View {
if viewStyle == .horizontal {
VSplitView {
content()
}
} else {
HSplitView {
content()
}
}
}
private func formatZoom(_ number: CGFloat) -> String {
let formatter = NumberFormatter()
formatter.numberStyle = .decimal
formatter.maximumFractionDigits = 1
formatter.minimumFractionDigits = 1
return (formatter.string(from: NSNumber(value: number)) ?? "") + "x"
}
private func onDragVertex(vertex: Vertex, x: CGFloat, y: CGFloat) {
print("Dragging: \(vertex), \(x), \(y)")
}
private func saveImage() {
if let image = document.exportAsImage(withEvolution: selectedEvolution) {
let filename = url?.deletingPathExtension().lastPathComponent ?? "Untitled"
let savePanel = NSSavePanel()
savePanel.allowedContentTypes = [.png]
savePanel.canCreateDirectories = true
savePanel.isExtensionHidden = false
savePanel.title = "Save \(filename) as image"
savePanel.message = "Choose a location to save the image"
savePanel.nameFieldStringValue = "\(filename).png"
savePanel.begin { result in
if result == .OK, let url = savePanel.url {
if let tiffRepresentation = image.tiffRepresentation {
let bitmapImage = NSBitmapImageRep(data: tiffRepresentation)
let pngData = bitmapImage?.representation(using: .png, properties: [:])
do {
try pngData?.write(to: url)
} catch {
return
}
}
}
}
}
}
}
#Preview {
MapEditor(document: .constant(MapDocument()), url: URL(filePath: "test.png")!)
}
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