list with check and actions, na navigations

ListdemoWithSelection.swift

//
//  ContentView.swift
//  aaaa
//
//  Created by ing.conti on 08/08/23.
//

//
//  ContentView.swift
//  ListdemoWithSelection
//
//  Created by ing.conti on 21/01/21.

import SwiftUI

struct ResultView: View {
    var choice: String

    var body: some View {
        Text("You eat \(choice)")
    }
}

typealias ID = String
typealias IDSet = Set<ID>

enum ActionType : Int {
    case Select
    case Smile
}

typealias BtnCallBack = ( (String, ActionType)->() )?


struct CellView : View{
    var id: ID // for now the same as text..
    var text: String
    var checked: Bool
    var callback: BtnCallBack
    
    var body: some View {
        
        let checkStr = checked ? "checkmark.circle" : "circle"
        
        
        NavigationLink(destination: ResultView(choice: id)) {
            
            
            HStack {
                Image(systemName: checkStr).frame(width: 20)
                    .onTapGesture {
                        print("tapped on")
                        callback?(id, .Select)
                    }
                
                Text(text).onTapGesture {
                    print("No access!")
                }
                Spacer()
                Text("😍").onTapGesture {
                    print("smile!")
                    callback?("smile", .Smile)
                }
            } // HStack
        
        }
    }
}



// navigation hint:
// https://www.hackingwithswift.com/articles/216/complete-guide-to-navigationview-in-swiftui


struct ListDemo: View {
    @State var items = ["Pizza", "Spaghetti", "Caviar"]
    @State var selection = IDSet()
    @State var tapped = ""
    
    var body: some View {
        
        let callBack = { (id: String, action: ActionType)  in
            print(id)
            if action == .Select{
                if  selection.contains(id) {
                    selection.remove(id)
                }
                else{
                    selection.insert(id)
                }
                print(selection)
            }
        } // action
        
        NavigationView {
            VStack {
                List(items, id: \.self) { (item : String) in
                    let checked = selection.contains(item)
                    CellView(id: item, text: item,
                             checked: checked,
                             callback: callBack)
                    
                }
                //.listStyle(GroupedListStyle())
            }
            #if os(iOS)
            .navigationBarTitle(Text("-"), displayMode: .inline)
            .navigationBarHidden(true)
            #endif

            
        }// NavigationView
    }
}


struct ContentView: View {
    var body: some View {
        
        ListDemo()
        
    }
}

struct ContentView_Previews: PreviewProvider {
    static var previews: some View {
        ContentView()
    }
}