GridViewerContentView.swift

import SwiftUI

struct ContentView: View {
    @Namespace var namespace
    @State var selectedIndex = -1
    
    let column = GridItem(.adaptive(minimum: 50))
    var body: some View {
        ZStack {
            ScrollView {
                LazyVGrid(columns: [column, column]) {
                    ForEach(0...99, id: \.self) { index in
                        if selectedIndex != index {
                            AdaptiveView(namespace: namespace, selectedIndex: $selectedIndex,
                                         index: index, isSource: true)
                        } else {
                            Rectangle()
                        }
                    }
                }
            }
            .padding()
            if selectedIndex != -1 {
                AdaptiveView(namespace: namespace, selectedIndex: $selectedIndex,
                             index: selectedIndex, isSource: false)
            }
        }
    }
}