FloorFilterExample.swift

//
// Copyright 2022 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
// 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 Foundation
import UIKit
import ArcGIS
import ArcGISToolkit

class FloorFilterExample: MapViewController {
    var floorFilterVC: FloorFilterViewController?
    
    override func viewDidLoad() {
        super.viewDidLoad()
        
        // Create the map from a portal item and assign to the mapView.
        let portal = AGSPortal(url: URL(string: "https://indoors.maps.arcgis.com/")!, loginRequired: false)
        let portalItem = AGSPortalItem(portal: portal, itemID: "f133a698536f44c8884ad81f80b6cfc7")
        let map = AGSMap(item: portalItem)
        mapView.map = map
        
        // The expansion direction of the floor filter determines which way it will open.
        // If the floor filter is placed on the top of the screen, it is recommended to use the style 'down'.
        // If floor filter placed on the bottom of the screen, then use 'up'.
        let floorFilterVC = FloorFilterViewController.makeFloorFilterView(
            geoView: mapView,
            expansionDirection: .up
        )
        self.floorFilterVC = floorFilterVC
        floorFilterVC.onSelectedLevelChangedListener = {
            print("Level was changed.")
        }
        
        // Add floor filter to the current view.
        floorFilterVC.view.translatesAutoresizingMaskIntoConstraints = false
        addChild(floorFilterVC)
        view.addSubview(floorFilterVC.view)
        floorFilterVC.didMove(toParent: self)
        
        let leadingConstraint = CGFloat(40)
        floorFilterVC.view.leadingAnchor.constraint(equalTo: view.leadingAnchor, constant: leadingConstraint).isActive = true
        
        // This places the floor filter at the bottom of the view,
        // anchored to the top of the map view's attribution bar.
        floorFilterVC.view.bottomAnchor.constraint(equalTo: mapView.attributionTopAnchor, constant: -leadingConstraint).isActive = true
        
        // This places the floor filter at the top of the view,
        // just below the top anchor of the safe area layout guide.
        // Set the constraint to true and set the bottom constraint to false
        floorFilterVC.view.topAnchor.constraint(equalTo: view.safeAreaLayoutGuide.topAnchor, constant: leadingConstraint).isActive = false
    }
}