Add Support to open map navigation/route guidance in app.

[patelsandeep]

Hello @oguzhnatly , I am working in flutter app which requires to show direction and route guidance between two points.

Sharing screenshot for reference.

Can we add this functionality in the map showing above (CPPointOfInterestTemplate)?

I glanced to the native integration also which explained here https://developer.apple.com/documentation/carplay/integrating_carplay_with_your_navigation_app

And also go through CPPointOfInterestTemplate and flutter_carplay limitations.

I am newbie to flutter. Could you please explain possibilities I have mentioned.

Thanks.

[AhmedTitef]

i am having the same issue.

[ragul-steamA]

Hi there, I am facing the same issue but i fixed this by editing some plugin code.

FlutterCarPlaySceneDelegate.swift

//  FlutterCarPlayPluginsSceneDelegate.swift
//  flutter_carplay
//
//  Created by Oğuzhan Atalay on 21.08.2021.
//

import CarPlay

@available(iOS 14.0, *)
class FlutterCarPlaySceneDelegate: UIResponder, CPTemplateApplicationSceneDelegate {
  static public var interfaceController: CPInterfaceController?
  static public var carplayScene: CPTemplateApplicationScene?

  static public func forceUpdateRootTemplate() {
    let rootTemplate = SwiftFlutterCarplayPlugin.rootTemplate
    let animated = SwiftFlutterCarplayPlugin.animated

    self.interfaceController?.setRootTemplate(rootTemplate!, animated: animated)
  }

  // Fired when just before the carplay become active
  func sceneDidBecomeActive(_ scene: UIScene) {
    SwiftFlutterCarplayPlugin.onCarplayConnectionChange(status: FCPConnectionTypes.connected)
  }

  // Fired when carplay entered background
  func sceneDidEnterBackground(_ scene: UIScene) {
    SwiftFlutterCarplayPlugin.onCarplayConnectionChange(status: FCPConnectionTypes.background)
  }

  static public func pop(animated: Bool) {
    self.interfaceController?.popTemplate(animated: animated)
  }

  static public func popToRootTemplate(animated: Bool) {
    self.interfaceController?.popToRootTemplate(animated: animated)
  }

  static public func push(template: CPTemplate, animated: Bool) {
    self.interfaceController?.pushTemplate(template, animated: animated)
  }

  static public func closePresent(animated: Bool) {
    self.interfaceController?.dismissTemplate(animated: animated)
  }

  static public func presentTemplate(
    template: CPTemplate, animated: Bool,
    onPresent: @escaping (_ completed: Bool) -> Void
  ) {
    self.interfaceController?.presentTemplate(
      template, animated: animated,
      completion: { completed, error in
        guard error != nil else {
          onPresent(false)
          return
        }
        onPresent(completed)
      })
  }

  func templateApplicationScene(
    _ templateApplicationScene: CPTemplateApplicationScene,
    didConnect interfaceController: CPInterfaceController
  ) {
    FlutterCarPlaySceneDelegate.interfaceController = interfaceController
    FlutterCarPlaySceneDelegate.carplayScene = templateApplicationScene

    SwiftFlutterCarplayPlugin.onCarplayConnectionChange(status: FCPConnectionTypes.connected)
    let rootTemplate = SwiftFlutterCarplayPlugin.rootTemplate

    if rootTemplate != nil {
      FlutterCarPlaySceneDelegate.interfaceController?.setRootTemplate(
        rootTemplate!, animated: SwiftFlutterCarplayPlugin.animated, completion: nil)
    }
  }

  static public func launchMapsApp(
    longitude: Double?, latitude: Double?, fromLongitude: Double? = nil, fromLatitude: Double? = nil
  ) {
    guard let destinationLongitude = longitude, let destinationLatitude = latitude else {
      NSLog("Destination coordinates are missing")
      return
    }

    let destination = "\(destinationLatitude),\(destinationLongitude)"
    let source =
      fromLongitude != nil && fromLatitude != nil
      ? "\(fromLatitude!),\(fromLongitude!)"
      : "current"

    let urlString = "maps://?daddr=\(destination)&saddr=\(source)"

    guard let url = URL(string: urlString) else {
      NSLog("Failed to create valid URL for Maps app")
      return
    }

    carplayScene?.open(url, options: nil) { success in
      if success {
        NSLog("Maps app launched successfully with route")
      } else {
        NSLog("Failed to launch Maps app")
      }
    }
  }

  static public func launchMaps(longitude: Double?, latitude: Double?) {
    guard let destinationLongitude = longitude, let destinationLatitude = latitude else {
      NSLog("Destination coordinates are missing")
      return
    }

    let googleMapsScheme = "comgooglemaps://"
    let webFallbackURL =
      "https://www.google.com/maps/dir/?api=1&destination=\(destinationLatitude),\(destinationLongitude)&travelmode=driving"

    // Construct the URL for Google Maps app
    if let url = URL(
      string:
        "\(googleMapsScheme)?saddr=current&daddr=\(destinationLatitude),\(destinationLongitude)&directionsmode=driving"
    ) {
      if UIApplication.shared.canOpenURL(url) {
        carplayScene?.open(url, options: nil) { success in
          if success {
            NSLog("Google Maps launched successfully with route")
          } else {
            NSLog("Failed to launch Google Maps app")
          }
        }
        return
      }
    }

    // Fallback to web browser if app is not installed
    if let appleMapURL = URL(string: "maps://?ll=\(destinationLatitude),\(destinationLongitude)") {
      carplayScene?.open(appleMapURL, options: nil) { success in
        if success {
          NSLog("Opened location in Apple Maps")
        } else {
          NSLog("Failed to open Apple Maps")
        }
      }
    } else {
      NSLog("Failed to create valid URL for Apple Maps")
    }
  }

  func templateApplicationScene(
    _ templateApplicationScene: CPTemplateApplicationScene,
    didDisconnect interfaceController: CPInterfaceController, from window: CPWindow
  ) {
    SwiftFlutterCarplayPlugin.onCarplayConnectionChange(status: FCPConnectionTypes.disconnected)

    //FlutterCarPlaySceneDelegate.interfaceController = nil
  }

  func templateApplicationScene(
    _ templateApplicationScene: CPTemplateApplicationScene,
    didDisconnectInterfaceController interfaceController: CPInterfaceController
  ) {
    SwiftFlutterCarplayPlugin.onCarplayConnectionChange(status: FCPConnectionTypes.disconnected)

    //FlutterCarPlaySceneDelegate.interfaceController = nil
  }
}

added a function launchMaps which should be called to redirect.

FCPPointOfInterest.swift

//
//  FCPPointOfInterest.swift
//  Runner
//
//  Created by Olaf Schneider on 15.02.22.
//

import CarPlay

@available(iOS 14.0, *)
class FCPPointOfInterest {
    private(set) var _super: CPPointOfInterest?
    private(set) var elementId: String
    private var latitude: Double
    private var longitude: Double
    private var title: String
    private var subtitle: String?
    private var summary: String?
    private var detailTitle: String?
    private var detailSubtitle: String?
    private var detailSummary: String?
    private var image: String?

    private var primaryButton: CPTextButton?
    private var objcPrimaryButton: FCPTextButton?

    private var secondaryButton: CPTextButton?
    private var objcSecondaryButton: FCPTextButton?

    static let maxPinImageSize: CGFloat = 40

    private var scene: CPTemplateApplicationScene?

    init(obj: [String: Any]) {
        self.elementId = obj["_elementId"] as! String

        let lat = obj["latitude"] as! NSNumber
        self.latitude = lat.doubleValue

        let lng = obj["longitude"] as! NSNumber
        self.longitude = lng.doubleValue
        self.title = obj["title"] as! String
        self.subtitle = obj["subtitle"] as? String
        self.summary = obj["summary"] as? String
        self.detailTitle = obj["detailTitle"] as? String
        self.detailSubtitle = obj["detailSubtitle"] as? String
        self.detailSummary = obj["detailSummary"] as? String
        self.image = obj["image"] as? String
        self.scene = FlutterCarPlaySceneDelegate.carplayScene as? CPTemplateApplicationScene

        let primaryButtonData = obj["primaryButton"] as? [String: Any]
        if primaryButtonData != nil {
            self.objcPrimaryButton = FCPTextButton(obj: primaryButtonData!)

            // Create a new CPTextButton with all required parameters
            let button = CPTextButton(
                title: self.objcPrimaryButton?.get.title ?? "",
                textStyle: .normal,  // You can change to .confirm if needed
                handler: { [weak self] _ in
                    FlutterCarPlaySceneDelegate.launchMaps(longitude: self?.longitude, latitude: self?.latitude)
                }
            )

            self.primaryButton = button
        }
        let secondaryButtonData = obj["secondaryButton"] as? [String: Any]
        if secondaryButtonData != nil {
            self.objcSecondaryButton = FCPTextButton(obj: secondaryButtonData!)
            self.secondaryButton = self.objcSecondaryButton?.get
        }
    }

    

    var get: CPPointOfInterest {

        let location = MKMapItem(
            placemark: MKPlacemark(
                coordinate: CLLocationCoordinate2D(latitude: latitude, longitude: longitude)))
        var pinImage: UIImage? = nil

        if let image = self.image {
            let key = SwiftFlutterCarplayPlugin.registrar?.lookupKey(forAsset: image)

            pinImage = UIImage(named: key!)
            if let pImage = pinImage {
                if pImage.size.height > FCPPointOfInterest.maxPinImageSize
                    || pImage.size.width > FCPPointOfInterest.maxPinImageSize
                {
                    pinImage = pImage.resizeImageTo(
                        size: CGSize(
                            width: FCPPointOfInterest.maxPinImageSize,
                            height: FCPPointOfInterest.maxPinImageSize))
                }
            }
        }
        let poi = CPPointOfInterest(
            location: location, title: title, subtitle: subtitle, summary: summary,
            detailTitle: detailTitle, detailSubtitle: detailSubtitle,
            detailSummary: detailSummary, pinImage: pinImage)

        if let primaryButton = self.primaryButton {
            poi.primaryButton = primaryButton

        }
        if let secondaryButton = self.secondaryButton {
            poi.secondaryButton = secondaryButton
        }

        self._super = poi
        return poi
    }
}

I had overiden the primary button functionality to call the launch function.

in Flutter:

CPPointOfInterest(
            latitude:latitude,
            longitude:longitude,
            title: 'title',
            subtitle: 'subtitle',
            summary: 'summary',
            primaryButton: CPTextButton(
              title: 'Navigate',
              onPress: () async {},
            ),
          )

Use the POI template like mentioned here.

[ragul-steamA]

Use a real device with carplay simulator for testing