Set feature layer rendering mode on map

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// Copyright 2025 Esri
//
// 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
//
//   https://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 ArcGIS
import SwiftUI

struct SetFeatureLayerRenderingModeOnMapView: View {
    /// A map used to show dynamic rendering.
    @State private var dynamicMap = Map()

    /// A map used to show static rendering.
    @State private var staticMap = Map()

    /// A Boolean value indicating whether the map views are zoomed in.
    @State private var isZoomedIn = true

    /// A Boolean value indicating whether the map views are currently zooming.
    @State private var isZooming = false

    /// The viewpoint of the map views.
    @State private var viewpoint: Viewpoint?

    init() {
        // Creates service feature tables using point, polygon, and polyline services.
        let pointTable = ServiceFeatureTable(url: URL(string: "https://sampleserver6.arcgisonline.com/arcgis/rest/services/Energy/Geology/FeatureServer/0")!)
        let polylineTable = ServiceFeatureTable(url: URL(string: "https://sampleserver6.arcgisonline.com/arcgis/rest/services/Energy/Geology/FeatureServer/8")!)
        let polygonTable = ServiceFeatureTable(url: URL(string: "https://sampleserver6.arcgisonline.com/arcgis/rest/services/Energy/Geology/FeatureServer/9")!)

        let featureLayers: [FeatureLayer] = [
            FeatureLayer(featureTable: pointTable),
            FeatureLayer(featureTable: polylineTable),
            FeatureLayer(featureTable: polygonTable)
        ]

        // Adds layers with dynamic and static rendering
        // to the respective maps.
        for layer in featureLayers {
            // Sets dynamic rendering.
            layer.renderingMode = .dynamic
            dynamicMap.addOperationalLayer(layer)

            // Sets static rendering.
            let staticLayer = layer.clone()
            staticLayer.renderingMode = .static
            staticMap.addOperationalLayer(staticLayer)
        }

        dynamicMap.initialViewpoint = .zoomedOut
        staticMap.initialViewpoint = .zoomedOut
    }

    var body: some View {
        VStack(spacing: 0) {
            MapViewReader { mapViewProxy in
                MapView(map: dynamicMap)
                    .overlay(alignment: .top) {
                        Text("Dynamic")
                            .multilineTextAlignment(.center)
                            .frame(maxWidth: .infinity, alignment: .center)
                            .padding(8)
                            .background(.regularMaterial, ignoresSafeAreaEdges: .horizontal)
                    }
                    .task(id: viewpoint) {
                        guard let viewpoint else { return }
                        await mapViewProxy.setViewpoint(viewpoint, duration: 5)
                        isZooming = false
                    }
            }
            MapViewReader { mapViewProxy in
                MapView(map: staticMap)
                    .overlay(alignment: .top) {
                        Text("Static")
                            .multilineTextAlignment(.center)
                            .frame(maxWidth: .infinity, alignment: .center)
                            .padding(8)
                            .background(.regularMaterial, ignoresSafeAreaEdges: .horizontal)
                    }
                    .task(id: viewpoint) {
                        guard let viewpoint else { return }
                        await mapViewProxy.setViewpoint(viewpoint, duration: 5)
                        isZooming = false
                    }
            }
        }
        .onChange(of: isZooming) {
            if isZooming {
                // Zooming began.
                viewpoint = isZoomedIn ? .zoomedIn : .zoomedOut
            } else {
                // Zooming ended.
                isZoomedIn.toggle()
            }
        }
        .toolbar {
            ToolbarItem(placement: .bottomBar) {
                Button {
                    isZooming = true
                } label: {
                    isZoomedIn ? Text("Zoom Out") : Text("Zoom In")
                }
                .disabled(isZooming)
            }
        }
    }
}

private extension Viewpoint {
    static var zoomedIn: Viewpoint {
        Viewpoint(
            center: Point(x: -118.37, y: 34.46, spatialReference: .wgs84),
            scale: 650000,
            rotation: 0
        )
    }

    static var zoomedOut: Viewpoint {
        Viewpoint(
            center: Point(x: -118.45, y: 34.395, spatialReference: .wgs84),
            scale: 50000,
            rotation: 90
        )
    }
}

#Preview {
    SetFeatureLayerRenderingModeOnMapView()
}