import SwiftUI import Charts struct TemperatureDayOverview: View { let storage: TemperatureStorage @State var points: [TemperatureMeasurement] = [] init(storage: TemperatureStorage, dateIndex: Int) { self.storage = storage let points = storage.loadMeasurements(for: dateIndex) print("Loaded \(points.count) points for date \(dateIndex)") self.points = points update() } mutating func update() { self.upperTempLimit = max(40, points.maximumValue() ?? 40) self.lowerTempLimit = min(-20, points.minimumValue() ?? -20) let startDay = points.first?.date.dateIndex ?? Date().dateIndex self.pastDateLimit = Date(dateIndex: startDay) let endDay = (points.last?.date.dateIndex ?? Date().dateIndex) + 1 self.futureDateLimit = Date(dateIndex: endDay) } var upperTempLimit: Double = 40.0 var lowerTempLimit: Double = -20 var pastDateLimit: Date = Date().startOfDay var futureDateLimit: Date = Date().startOfNextDay var body: some View { Chart { ForEach(points) { point in if let s = point.sensor0.optionalValue { LineMark( x: .value("Date", point.date), y: .value("Temperature", s)) .foregroundStyle(by: .value("Type", "Sensor 0")) } if let s = point.sensor1.optionalValue { LineMark( x: .value("Date", point.date), y: .value("Temperature", s)) .foregroundStyle(by: .value("Type", "Sensor 1")) } } } .aspectRatio(2.6, contentMode: .fit) //.chartXScale(domain: pastDateLimit...futureDateLimit) .chartYScale(domain: lowerTempLimit...upperTempLimit) .chartXAxis { AxisMarks(preset: .automatic) AxisMarks.init(values: AxisMarkValues.stride(by: .hour)) { AxisGridLine() } } .chartYAxis { AxisMarks(position: .trailing, values: .automatic) { value in AxisValueLabel(multiLabelAlignment: .trailing) { if let intValue = value.as(Int.self) { Text("\(intValue)°") .font(.system(size: 10)) //.foregroundColor(.white) } } } AxisMarks.init(values: AxisMarkValues.stride(by: 5)) { AxisGridLine() } } .padding() } } struct TemperatureDayOverview_Previews: PreviewProvider { static var previews: some View { TemperatureDayOverview(storage: TemperatureStorage.mock, dateIndex: Date().dateIndex) .previewLayout(.fixed(width: 350, height: 150)) //.background(.gray) } }