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WordSizeGetter in WordCloudView demo
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struct WordCloudView: View { | |
private let words: [WordElement] = [WordElement].generate(forSwiftUI: true) | |
@State private var canvasRect = CGRect() | |
@State private var wordSizes: [CGSize] | |
init() { | |
self._wordSizes = State(initialValue:[CGSize](repeating: CGSize.zero, count: words.count)) | |
} | |
var body: some View { | |
let pos = calcPositions(canvasSize: canvasRect.size, itemSizes: wordSizes) | |
return ZStack{ | |
ForEach(Array(words.enumerated()), id: \.offset) {idx, word in | |
NavigationLink(destination: Text("\(word.text)")) { | |
Text("\(word.text)") | |
.foregroundColor(Color(word.color)) | |
.font(Font.custom(word.fontName, | |
size:word.fontSize)) | |
.lineLimit(1) | |
.fixedSize(horizontal: false, vertical: true) | |
.padding(3) | |
.background(WordSizeGetter($wordSizes, idx)) | |
} | |
.position(x: canvasRect.width/2 + pos[idx].x, | |
y: canvasRect.height/2 + pos[idx].y) | |
} | |
} | |
.background(RectGetter($canvasRect)) | |
} | |
func calcPositions(canvasSize: CGSize, itemSizes: [CGSize]) -> [CGPoint] { | |
var pos = [CGPoint](repeating: CGPoint.zero, count: itemSizes.count) | |
if canvasSize.height == 0 { | |
return pos | |
} | |
// ... | |
} | |
} | |
struct WordSizeGetter: View { | |
@Binding var sizeStorage: [CGSize] | |
private var index: Int | |
init(_ sizeStorage: Binding<[CGSize]>, _ index: Int) { | |
_sizeStorage = sizeStorage | |
self.index = index | |
} | |
var body: some View { | |
GeometryReader { proxy in | |
self.createView(proxy: proxy) | |
} | |
} | |
func createView(proxy: GeometryProxy) -> some View { | |
DispatchQueue.main.async { | |
self.sizeStorage[index] = proxy.frame(in: .global).size | |
} | |
return Rectangle().fill(Color.clear) | |
} | |
} |
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