abgwtpD

.swift

struct TheDropDelegate: DropDelegate {
  @Binding var textID:Int?
  @Binding var textText:[String]
  @Binding var rect:[CGRect]
  @Binding var textColors:[Color]
  func validateDrop(info: DropInfo) -> Bool {
    return info.hasItemsConforming(to: ["public.utf8-plain-text"])
  }
  func dropEntered(info: DropInfo) {
    print("drop entered")
  }
  func dropTarget(info: DropInfo) -> Int? {
    for squareno in 0..<rect.count {
      if rect[squareno].contains(info.location) {
        return squareno
      }
    }
    return nil
  }
  func performDrop(info: DropInfo) -> Bool {
    guard let _ = textID else {
      return false
    }
    textID = dropTarget(info: info)!
    if let item = info.itemProviders(for: ["public.utf8-plain-text"]).first {
      item.loadItem(forTypeIdentifier: "public.utf8-plain-text", options: nil) { (urlData, error) in
        DispatchQueue.main.async {
          if let urlData = urlData as? Data {
            let text = String(decoding: urlData, as: UTF8.self)
            self.textText[self.textID!] = text
            switch text {
            case " 1 ": self.textColors[self.textID!] = Color.red
            case " 2 ": self.textColors[self.textID!] = Color.blue
            case " 3 ": self.textColors[self.textID!] = Color.orange
            // 4 is the last option
            default: self.textColors[self.textID!] = Color.green
            }
          }
        }
      }
      return true
    } else {
      return false
    }
  }
  func dropUpdated(info: DropInfo) -> DropProposal? {
    print("drop Updated")
    let item = info.hasItemsConforming(to: ["public.utf8-plain-text"])
    let dp = DropProposal(operation: .move)
    //            self.textValue = ""
    return dp
  }
  func dropExited(info: DropInfo) {
    print("dropExited")
  }
}