GenericPickerView

GenericPickerView.swift

//  Copyright © 2025 onegai.com. All rights reserved.


import SwiftUI

struct GenericPickerView<T: CaseIterable & RawRepresentable>: View where T.RawValue == String, T: Hashable {
    @Binding var selection: T
    private let labelImageName: String
    private let localizedString: (T) -> String

    init(
        selection: Binding<T>,
        labelImageName: String = "chevron.up.chevron.down",
        localizedString: @escaping (T) -> String
    ) {
        self._selection = selection
        self.labelImageName = labelImageName
        self.localizedString = localizedString
    }

    var body: some View {
        Menu {
            ForEach(Array(T.allCases), id: \.self) { value in
                Button {
                    selection = value
                } label: {
                    labelContent(for: value)
                }
            }
        } label: {
            menuLabel(for: localizedString(selection), labelImageName: labelImageName)
        }
    }

    private func labelContent(for value: T) -> some View {
        HStack {
            Text(localizedString(value))
                .font(.caption2)
            if value == selection {
                Image(systemName: "checkmark")
                    .font(.callout)
            }
        }
    }
}

func menuLabel(for text: String, labelImageName: String) -> some View {
    HStack(spacing: 2) {
        Text(text)
            .font(.footnote)
        Image(systemName: labelImageName)
            .font(.footnote)
    }
    .padding(4)
    .padding(.horizontal, 2)
    .background {
        RoundedRectangle(cornerRadius: 6).fill(.white.opacity(0.8))
    }
}