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annotate Simoleon/Helpers/ConversionBox.swift @ 34:a8d76aa51da2

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Fixes crash textfield
author Dennis Concepción Martín <dennisconcepcionmartin@gmail.com>
date Fri, 23 Jul 2021 13:57:30 +0100
parents c3dda63f50ed
children 41a905e591e4
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1 //
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2 // ConversionBox.swift
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3 // Simoleon
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4 //
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5 // Created by Dennis Concepción Martín on 18/07/2021.
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6 //
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7
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8 import SwiftUI
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9
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10 struct ConversionBox: View {
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11 @Binding var currencyPair: String
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12 @Binding var amountToConvert: String { willSet { print(newValue) }}
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13 @Binding var price: Double
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14 @Binding var showingConversion: Bool
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15 @Binding var showingCurrencySelector: Bool
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16 @Binding var isEditing: Bool
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18 let currencyMetadata: [String: CurrencyMetadataModel] = parseJson("CurrencyMetadata.json")
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19
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20 var body: some View {
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21 VStack(alignment: .leading) {
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22 let currencies = currencyPair.split(separator: "/")
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23 Text("\(currencyMetadata[String(currencies[0])]!.name) (\(String(currencies[0])))")
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24 .font(.callout)
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25 .fontWeight(.semibold)
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26 .padding(.top, 40)
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28 ZStack(alignment: .trailing) {
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29 TextField("Enter amount", text: $amountToConvert) { startedEditing in
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30 if startedEditing {
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31 withAnimation {
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32 isEditing = true
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33 }
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34 }
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35 }
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36 onCommit: {
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37 withAnimation {
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38 isEditing = false
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39 }
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40 }
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41 .keyboardType(.decimalPad)
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42 .font(Font.title.weight(.semibold))
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43 .lineLimit(1)
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44 .padding(.bottom, 10)
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45 }
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46
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47 Divider()
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48
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49 Text("\(currencyMetadata[String(currencies[1])]!.name) (\(String(currencies[1])))")
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50 .font(.callout)
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51 .fontWeight(.semibold)
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52 .padding(.top, 10)
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53
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54 if showingConversion {
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55 Text("\(makeConversion(), specifier: "%.2f")")
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56 .font(Font.title.weight(.semibold))
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57 .lineLimit(1)
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58 .padding(.top, 5)
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59 } else {
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60 ProgressView()
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61 .padding(.top, 5)
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62 }
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63 }
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64 }
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67 private func makeConversion() -> Double {
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68 if amountToConvert.isEmpty { /// Avoid nil error when string is empty
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69 return 0
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70 } else {
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71 let conversion = Double(amountToConvert) ?? 0 * price
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73 return conversion
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74 }
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75 }
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76 }
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79 struct ConversionBox_Previews: PreviewProvider {
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80 static var previews: some View {
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81 ConversionBox(currencyPair: .constant("USD/GBP"), amountToConvert: .constant("1000"), price: .constant(1), showingConversion: .constant(false), showingCurrencySelector: .constant(false), isEditing: .constant(false))
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82 }
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83 }