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11.853kb
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// |
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// MeterView.swift |
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// USB Meter |
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// |
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// Created by Bogdan Timofte on 04/03/2020. |
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// Copyright © 2020 Bogdan Timofte. All rights reserved. |
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// |
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// MARK: Parent frame https://stackoverflow.com/questions/56832865/how-to-access-parents-frame-in-swiftui |
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import SwiftUI |
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import CoreBluetooth |
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struct MeterView: View {
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private enum MeterTab: Hashable {
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case connection |
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case live |
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case chart |
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case settings |
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var title: String {
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switch self {
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case .connection: return "Home" |
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case .live: return "Live" |
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case .chart: return "Chart" |
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case .settings: return "Settings" |
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} |
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} |
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var systemImage: String {
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switch self {
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case .connection: return "house.fill" |
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case .live: return "waveform.path.ecg" |
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case .chart: return "chart.xyaxis.line" |
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case .settings: return "gearshape.fill" |
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} |
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} |
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} |
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@EnvironmentObject private var meter: Meter |
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@Environment(\.dismiss) private var dismiss |
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private static let isMacIPadApp: Bool = ProcessInfo.processInfo.isiOSAppOnMac |
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@State private var selectedMeterTab: MeterTab = .connection |
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@State private var navBarTitle: String = "Meter" |
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@State private var navBarShowRSSI: Bool = false |
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@State private var navBarRSSI: Int = 0 |
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var body: some View {
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GeometryReader { proxy in
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let landscape = isLandscape(size: proxy.size) |
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VStack(spacing: 0) {
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if Self.isMacIPadApp {
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macNavigationHeader |
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} |
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Group {
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if landscape {
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landscapeDeck(size: proxy.size) |
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} else {
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portraitContent(size: proxy.size) |
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} |
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} |
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.frame(maxWidth: .infinity, maxHeight: .infinity, alignment: .top) |
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} |
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#if !targetEnvironment(macCatalyst) |
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.navigationBarHidden(Self.isMacIPadApp || landscape) |
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#endif |
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} |
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.background(meterBackground) |
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.modifier(IOSOnlyNavBar( |
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apply: !Self.isMacIPadApp, |
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title: navBarTitle, |
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showRSSI: navBarShowRSSI, |
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rssi: navBarRSSI, |
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meter: meter |
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)) |
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.onAppear {
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navBarTitle = meter.name.isEmpty ? "Meter" : meter.name |
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navBarShowRSSI = meter.operationalState > .notPresent |
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navBarRSSI = meter.btSerial.averageRSSI |
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} |
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.onChange(of: meter.name) { name in
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navBarTitle = name.isEmpty ? "Meter" : name |
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} |
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.onChange(of: meter.operationalState) { state in
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navBarShowRSSI = state > .notPresent |
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} |
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.onChange(of: meter.btSerial.averageRSSI) { newRSSI in
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if abs(newRSSI - navBarRSSI) >= 5 {
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navBarRSSI = newRSSI |
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} |
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} |
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} |
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// MARK: - Custom navigation header for Designed-for-iPad on Mac |
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private var macNavigationHeader: some View {
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HStack(spacing: 12) {
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Button {
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dismiss() |
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} label: {
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HStack(spacing: 4) {
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Image(systemName: "chevron.left") |
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.font(.body.weight(.semibold)) |
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Text("USB Meters")
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} |
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.foregroundColor(.accentColor) |
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} |
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.buttonStyle(.plain) |
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Text(meter.name.isEmpty ? "Meter" : meter.name) |
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.font(.headline) |
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.lineLimit(1) |
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Spacer() |
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if meter.operationalState > .notPresent {
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RSSIView(RSSI: meter.btSerial.averageRSSI) |
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.frame(width: 18, height: 18) |
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} |
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} |
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.padding(.horizontal, 16) |
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.padding(.vertical, 10) |
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.background( |
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Rectangle() |
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.fill(.ultraThinMaterial) |
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.ignoresSafeArea(edges: .top) |
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) |
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.overlay(alignment: .bottom) {
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Rectangle() |
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.fill(Color.secondary.opacity(0.12)) |
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.frame(height: 1) |
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} |
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} |
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private func portraitContent(size: CGSize) -> some View {
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portraitSegmentedDeck(size: size) |
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} |
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private func landscapeDeck(size: CGSize) -> some View {
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landscapeSegmentedDeck(size: size) |
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} |
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private func landscapeSegmentedDeck(size: CGSize) -> some View {
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VStack(spacing: 0) {
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segmentedTabBar(horizontalPadding: 12) |
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landscapeSegmentedContent(size: size) |
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.frame(maxWidth: .infinity, maxHeight: .infinity, alignment: .topLeading) |
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.id(selectedMeterTab) |
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.transition(.opacity.combined(with: .move(edge: .trailing))) |
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} |
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.animation(.easeInOut(duration: 0.22), value: selectedMeterTab) |
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.animation(.easeInOut(duration: 0.22), value: availableMeterTabs) |
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.onAppear {
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normalizeSelectedTab() |
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} |
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.onChange(of: availableMeterTabs) { _ in
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normalizeSelectedTab() |
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} |
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} |
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private func portraitSegmentedDeck(size: CGSize) -> some View {
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VStack(spacing: 0) {
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segmentedTabBar(horizontalPadding: 16) |
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portraitSegmentedContent(size: size) |
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.frame(maxWidth: .infinity, maxHeight: .infinity, alignment: .topLeading) |
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.id(selectedMeterTab) |
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.transition(.opacity.combined(with: .move(edge: .trailing))) |
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} |
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.animation(.easeInOut(duration: 0.22), value: selectedMeterTab) |
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.animation(.easeInOut(duration: 0.22), value: availableMeterTabs) |
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.onAppear {
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normalizeSelectedTab() |
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} |
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.onChange(of: availableMeterTabs) { _ in
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normalizeSelectedTab() |
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} |
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} |
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private func segmentedTabBar(horizontalPadding: CGFloat) -> some View {
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HStack {
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Spacer(minLength: 0) |
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HStack(spacing: 8) {
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ForEach(availableMeterTabs, id: \.self) { tab in
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let isSelected = selectedMeterTab == tab |
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Button {
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withAnimation(.easeInOut(duration: 0.2)) {
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selectedMeterTab = tab |
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} |
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} label: {
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HStack(spacing: 6) {
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Image(systemName: tab.systemImage) |
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.font(.subheadline.weight(.semibold)) |
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Text(tab.title) |
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.font(.subheadline.weight(.semibold)) |
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.lineLimit(1) |
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} |
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.foregroundColor(isSelected ? .white : .primary) |
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.padding(.horizontal, 10) |
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.padding(.vertical, 7) |
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.frame(maxWidth: .infinity) |
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.background( |
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Capsule() |
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.fill(isSelected ? meter.color : Color.secondary.opacity(0.12)) |
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) |
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} |
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.buttonStyle(.plain) |
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.accessibilityLabel(tab.title) |
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} |
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} |
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.frame(maxWidth: 420) |
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.padding(6) |
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.background( |
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RoundedRectangle(cornerRadius: 14, style: .continuous) |
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.fill(Color.secondary.opacity(0.10)) |
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) |
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Spacer(minLength: 0) |
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} |
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.padding(.horizontal, horizontalPadding) |
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.padding(.top, 10) |
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.padding(.bottom, 8) |
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.background( |
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Rectangle() |
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.fill(.ultraThinMaterial) |
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.opacity(0.78) |
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.ignoresSafeArea(edges: .top) |
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) |
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.overlay(alignment: .bottom) {
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Rectangle() |
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.fill(Color.secondary.opacity(0.12)) |
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.frame(height: 1) |
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} |
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} |
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@ViewBuilder |
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private func landscapeSegmentedContent(size: CGSize) -> some View {
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switch selectedMeterTab {
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case .connection: |
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MeterConnectionTabView(size: size, isLandscape: true) |
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case .live: |
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if meter.operationalState == .dataIsAvailable {
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MeterLiveTabView(size: size, isLandscape: true) |
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} else {
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MeterConnectionTabView(size: size, isLandscape: true) |
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} |
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case .chart: |
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if meter.measurements.power.context.isValid && meter.operationalState == .dataIsAvailable {
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MeterChartTabView(size: size, isLandscape: true) |
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} else {
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MeterConnectionTabView(size: size, isLandscape: true) |
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} |
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case .settings: |
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MeterSettingsTabView(isMacIPadApp: Self.isMacIPadApp) {
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withAnimation(.easeInOut(duration: 0.22)) {
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selectedMeterTab = .connection |
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} |
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} |
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} |
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} |
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@ViewBuilder |
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private func portraitSegmentedContent(size: CGSize) -> some View {
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switch selectedMeterTab {
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case .connection: |
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MeterConnectionTabView(size: size, isLandscape: false) |
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case .live: |
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if meter.operationalState == .dataIsAvailable {
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MeterLiveTabView(size: size, isLandscape: false) |
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} else {
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MeterConnectionTabView(size: size, isLandscape: false) |
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} |
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case .chart: |
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if meter.measurements.power.context.isValid && meter.operationalState == .dataIsAvailable {
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MeterChartTabView(size: size, isLandscape: false) |
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} else {
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MeterConnectionTabView(size: size, isLandscape: false) |
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} |
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case .settings: |
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MeterSettingsTabView(isMacIPadApp: Self.isMacIPadApp) {
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withAnimation(.easeInOut(duration: 0.22)) {
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selectedMeterTab = .connection |
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} |
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} |
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} |
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} |
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private var availableMeterTabs: [MeterTab] {
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var tabs: [MeterTab] = [.connection] |
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if meter.operationalState == .dataIsAvailable {
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tabs.append(.live) |
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if meter.measurements.power.context.isValid {
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tabs.append(.chart) |
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} |
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} |
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tabs.append(.settings) |
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return tabs |
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} |
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private func normalizeSelectedTab() {
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guard availableMeterTabs.contains(selectedMeterTab) else {
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withAnimation(.easeInOut(duration: 0.22)) {
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selectedMeterTab = .connection |
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} |
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return |
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} |
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} |
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private var meterBackground: some View {
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LinearGradient( |
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colors: [ |
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meter.color.opacity(0.22), |
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Color.secondary.opacity(0.08), |
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Color.clear |
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], |
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startPoint: .topLeading, |
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endPoint: .bottomTrailing |
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) |
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.ignoresSafeArea() |
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} |
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private func isLandscape(size: CGSize) -> Bool {
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size.width > size.height |
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} |
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} |
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// MARK: - Conditional navigation bar modifier (skipped on Designed-for-iPad / Mac) |
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private struct IOSOnlyNavBar: ViewModifier {
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let apply: Bool |
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let title: String |
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let showRSSI: Bool |
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let rssi: Int |
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let meter: Meter |
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@ViewBuilder |
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func body(content: Content) -> some View {
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if apply {
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content |
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.navigationBarTitle(title) |
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.toolbar {
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ToolbarItemGroup(placement: .navigationBarTrailing) {
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if showRSSI {
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RSSIView(RSSI: rssi) |
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.frame(width: 18, height: 18) |
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} |
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} |
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} |
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} else {
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content |
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} |
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} |
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} |