RevDoc PreviewContext

RevDoc PreviewContext.swift

import SwiftUI
import WidgetKit

extension Date {
  var timeString: String {
    let hour = Calendar.current.component(.hour, from: self)
    let minutes = Calendar.current.component(.minute, from: self)
    return "\(hour):\(minutes < 10 ? "0\(minutes)" : "\(minutes)")"
  }
}

struct ContentView: View {
  @Environment(\.widgetFamily) var family
  
  var text: String {
    switch family {
    case .systemSmall: return "Small size"
    case .systemMedium: return "Medium size"
    case .systemLarge: return "Large size"
    default: return "Default size"
    }
  }
  
  var backgroundColor: Color {
    switch family {
    case .systemSmall: return .red
    case .systemMedium: return .green
    case .systemLarge: return .blue
    default: return .orange
    }
  }
  var body: some View {
    Text("\(Date().timeString)\n\(text)")
      .font(.largeTitle)
      .fontWeight(.bold)
      .frame(maxWidth: .infinity, maxHeight: .infinity)
      .background(backgroundColor)
      .multilineTextAlignment(.center)
    
  }
}

struct ContentView_Previews: PreviewProvider {
  static var previews: some View {
    ContentView()
      .previewContext(WidgetPreviewContext(family: .systemSmall))
    ContentView()
      .previewContext(WidgetPreviewContext(family: .systemMedium))
    ContentView()
      .previewContext(WidgetPreviewContext(family: .systemLarge))
  }
}