MainScreen.swift

//
//  MainScreen.swift
//  IntroductionToSwiftUI-Workshop
//
//  Created by Mohammad Azam on 2/6/21.
//

import SwiftUI

class Settings: ObservableObject {
    @Published var isOn: Bool = false
}

struct MainScreen: View {
    
    var body: some View {
        VStack {
            Text("Main Screen")
            LightView()
            LightSwitchView()
            
        }.frame(maxWidth: .infinity, maxHeight: .infinity)
       
    }
}

struct MainScreen_Previews: PreviewProvider {
    static var previews: some View {
        MainScreen().environmentObject(Settings())
    }
}


struct LightView: View {
    
    @EnvironmentObject var settings: Settings
    
    var body: some View {
        VStack {
            Group {
                if settings.isOn {
                    Image(systemName: "lightbulb.fill")
                        .font(.largeTitle)
                        .foregroundColor(.yellow)
                } else {
                    Image(systemName: "lightbulb")
                        .font(.largeTitle)
                }
            }
        }.frame(maxWidth: .infinity, maxHeight: .infinity)
        .background(Color.blue)
    }
}

struct LightSwitchView: View {
    
    @EnvironmentObject var settings: Settings
    
    var body: some View {
        VStack {
            Toggle(isOn: $settings.isOn, label: {
                EmptyView()
            }).fixedSize()
        }.frame(maxWidth: .infinity, maxHeight: .infinity)
        .background(Color.orange)
    }
}