element-ios/RiotSwiftUI/Modules/Common/ActivityIndicator/ActivityIndicator.swift

// 
// Copyright 2021 New Vector Ltd
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
//

import SwiftUI

@available(iOS 14.0, *)
/// A visual cue to user that something is in progress.
struct ActivityIndicator: View {
    
    private enum Constants {
        static let backgroundColor = Color(UIColor(white: 0.8, alpha: 0.9))
    }
    
    var body: some View {
        ProgressView()
            .progressViewStyle(CircularProgressViewStyle(tint: Color.white))
            .padding()
            .background(Constants.backgroundColor)
            .cornerRadius(5)
            
    }
}

@available(iOS 14.0, *)
struct ActivityIndicator_Previews: PreviewProvider {
    static var previews: some View {
        Group {
            Text("Hello World!")
                .activityIndicator(show: true)
            Text("Hello World!")
                .activityIndicator(show: false)
        }
    }
}