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// |
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// LiveView.swift |
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// USB Meter |
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// |
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// Created by Bogdan Timofte on 09/03/2020. |
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// Copyright © 2020 Bogdan Timofte. All rights reserved. |
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// |
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import SwiftUI |
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struct LiveView: View {
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private struct MetricRange {
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let minLabel: String |
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let maxLabel: String |
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let minValue: String |
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let maxValue: String |
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} |
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private struct LoadResistanceSymbol: View {
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let color: Color |
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var body: some View {
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GeometryReader { proxy in
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let width = proxy.size.width |
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let height = proxy.size.height |
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let midY = height / 2 |
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let startX = width * 0.10 |
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let endX = width * 0.90 |
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let boxMinX = width * 0.28 |
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let boxMaxX = width * 0.72 |
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let boxHeight = height * 0.34 |
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let boxRect = CGRect( |
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x: boxMinX, |
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y: midY - (boxHeight / 2), |
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width: boxMaxX - boxMinX, |
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height: boxHeight |
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) |
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let strokeWidth = max(1.2, height * 0.055) |
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ZStack {
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Path { path in
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path.move(to: CGPoint(x: startX, y: midY)) |
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path.addLine(to: CGPoint(x: boxRect.minX, y: midY)) |
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path.move(to: CGPoint(x: boxRect.maxX, y: midY)) |
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path.addLine(to: CGPoint(x: endX, y: midY)) |
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} |
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.stroke( |
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color, |
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style: StrokeStyle( |
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lineWidth: strokeWidth, |
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lineCap: .round, |
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lineJoin: .round |
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) |
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) |
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Path { path in
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path.addRect(boxRect) |
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} |
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.stroke( |
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color, |
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style: StrokeStyle( |
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lineWidth: strokeWidth, |
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lineCap: .round, |
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lineJoin: .round |
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) |
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) |
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} |
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} |
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.padding(4) |
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} |
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} |
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@EnvironmentObject private var meter: Meter |
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var compactLayout: Bool = false |
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var availableSize: CGSize? = nil |
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var body: some View {
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VStack(alignment: .leading, spacing: 16) {
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HStack {
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Text("Live Data")
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.font(.headline) |
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Spacer() |
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statusBadge |
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} |
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LazyVGrid(columns: liveMetricColumns, spacing: compactLayout ? 10 : 12) {
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liveMetricCard( |
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title: "Voltage", |
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symbol: "bolt.fill", |
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color: .green, |
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value: "\(meter.voltage.format(decimalDigits: 3)) V", |
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range: metricRange( |
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min: meter.measurements.voltage.context.minValue, |
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max: meter.measurements.voltage.context.maxValue, |
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unit: "V" |
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) |
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) |
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liveMetricCard( |
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title: "Current", |
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symbol: "waveform.path.ecg", |
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color: .blue, |
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value: "\(meter.current.format(decimalDigits: 3)) A", |
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range: metricRange( |
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min: meter.measurements.current.context.minValue, |
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max: meter.measurements.current.context.maxValue, |
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unit: "A" |
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) |
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) |
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liveMetricCard( |
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title: "Power", |
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symbol: "flame.fill", |
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color: .pink, |
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value: "\(meter.power.format(decimalDigits: 3)) W", |
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range: metricRange( |
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min: meter.measurements.power.context.minValue, |
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max: meter.measurements.power.context.maxValue, |
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unit: "W" |
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) |
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) |
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liveMetricCard( |
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title: "Temperature", |
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symbol: "thermometer.medium", |
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color: .orange, |
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value: meter.primaryTemperatureDescription, |
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range: temperatureRange() |
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) |
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liveMetricCard( |
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title: "Load", |
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customSymbol: AnyView(LoadResistanceSymbol(color: .yellow)), |
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color: .yellow, |
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value: "\(meter.loadResistance.format(decimalDigits: 1)) \u{2126}",
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detailText: "Measured resistance" |
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) |
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liveMetricCard( |
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title: "RSSI", |
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symbol: "dot.radiowaves.left.and.right", |
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color: .mint, |
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value: "\(meter.btSerial.RSSI) dBm", |
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range: MetricRange( |
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minLabel: "Min", |
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maxLabel: "Max", |
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minValue: "\(meter.btSerial.minRSSI) dBm", |
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maxValue: "\(meter.btSerial.maxRSSI) dBm" |
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), |
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valueFont: .system(compactLayout ? .subheadline : .headline, design: .rounded).weight(.bold) |
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) |
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} |
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} |
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.frame(maxWidth: .infinity, alignment: .topLeading) |
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} |
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private var liveMetricColumns: [GridItem] {
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if compactLayout {
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return Array(repeating: GridItem(.flexible(), spacing: 10), count: 3) |
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} |
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return [GridItem(.flexible()), GridItem(.flexible())] |
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} |
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private var statusBadge: some View {
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Text(meter.operationalState == .dataIsAvailable ? "Live" : "Waiting") |
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.font(.caption.weight(.semibold)) |
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.padding(.horizontal, 10) |
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.padding(.vertical, 6) |
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.foregroundColor(meter.operationalState == .dataIsAvailable ? .green : .secondary) |
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.meterCard( |
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tint: meter.operationalState == .dataIsAvailable ? .green : .secondary, |
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fillOpacity: 0.12, |
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strokeOpacity: 0.16, |
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cornerRadius: 999 |
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) |
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} |
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private var showsCompactMetricRange: Bool {
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compactLayout && (availableSize?.height ?? 0) >= 380 |
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} |
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private var shouldShowMetricRange: Bool {
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!compactLayout || showsCompactMetricRange |
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} |
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private func liveMetricCard( |
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title: String, |
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symbol: String? = nil, |
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customSymbol: AnyView? = nil, |
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color: Color, |
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value: String, |
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range: MetricRange? = nil, |
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detailText: String? = nil, |
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valueFont: Font? = nil, |
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valueLineLimit: Int = 1, |
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valueMonospacedDigits: Bool = true, |
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valueMinimumScaleFactor: CGFloat = 0.85 |
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) -> some View {
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VStack(alignment: .leading, spacing: 10) {
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HStack(spacing: compactLayout ? 8 : 10) {
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Group {
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if let customSymbol {
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customSymbol |
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} else if let symbol {
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Image(systemName: symbol) |
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.font(.system(size: compactLayout ? 14 : 15, weight: .semibold)) |
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.foregroundColor(color) |
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} |
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} |
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.frame(width: compactLayout ? 30 : 34, height: compactLayout ? 30 : 34) |
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.background(Circle().fill(color.opacity(0.12))) |
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Text(title) |
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.font((compactLayout ? Font.caption : .subheadline).weight(.semibold)) |
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.foregroundColor(.secondary) |
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.lineLimit(1) |
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Spacer(minLength: 0) |
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} |
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Group {
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if valueMonospacedDigits {
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Text(value) |
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.monospacedDigit() |
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} else {
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Text(value) |
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} |
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} |
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.font(valueFont ?? .system(compactLayout ? .headline : .title3, design: .rounded).weight(.bold)) |
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.lineLimit(valueLineLimit) |
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.minimumScaleFactor(valueMinimumScaleFactor) |
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if shouldShowMetricRange {
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if let range {
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metricRangeTable(range) |
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} else if let detailText, !detailText.isEmpty {
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Text(detailText) |
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.font(.caption) |
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.foregroundColor(.secondary) |
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.lineLimit(2) |
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} |
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} |
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} |
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.frame( |
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maxWidth: .infinity, |
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minHeight: compactLayout ? (shouldShowMetricRange ? 132 : 96) : 128, |
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alignment: .leading |
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) |
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.padding(compactLayout ? 12 : 16) |
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.meterCard(tint: color, fillOpacity: 0.10, strokeOpacity: 0.12) |
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} |
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private func metricRangeTable(_ range: MetricRange) -> some View {
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VStack(alignment: .leading, spacing: 4) {
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HStack(spacing: 12) {
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Text(range.minLabel) |
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Spacer(minLength: 0) |
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Text(range.maxLabel) |
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} |
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.font(.caption2.weight(.semibold)) |
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.foregroundColor(.secondary) |
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HStack(spacing: 12) {
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Text(range.minValue) |
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.monospacedDigit() |
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Spacer(minLength: 0) |
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Text(range.maxValue) |
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.monospacedDigit() |
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} |
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.font(.caption.weight(.medium)) |
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.foregroundColor(.primary) |
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} |
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} |
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private func metricRange(min: Double, max: Double, unit: String) -> MetricRange? {
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guard min.isFinite, max.isFinite else { return nil }
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return MetricRange( |
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minLabel: "Min", |
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maxLabel: "Max", |
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minValue: "\(min.format(decimalDigits: 3)) \(unit)", |
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maxValue: "\(max.format(decimalDigits: 3)) \(unit)" |
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) |
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} |
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private func temperatureRange() -> MetricRange? {
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let value = meter.primaryTemperatureDescription |
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guard !value.isEmpty else { return nil }
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return MetricRange( |
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minLabel: "Min", |
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maxLabel: "Max", |
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minValue: value, |
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maxValue: value |
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) |
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} |
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} |