Switching to routes instead of manual navigation

lib/main.dart

@@ -2,6 +2,9 @@ import 'dart:io' show Platform;
 
 import 'package:flutter/cupertino.dart';
 import 'package:flutter/material.dart';
+import 'package:info_tren/train_info_page/train_info.dart';
+import 'package:info_tren/train_info_page/train_info_cupertino.dart';
+import 'package:info_tren/train_info_page/train_info_material.dart';
 import 'package:info_tren/train_info_page/train_info_prompt.dart';
 
 
@@ -20,7 +23,20 @@ class StartPoint extends StatelessWidget {
           primaryColor: Colors.blue.shade600,
           accentColor: Colors.blue.shade700,
         ),
-        home: MainPageMaterial(),
+//        home: MainPageMaterial(),
+        routes: {
+          Navigator.defaultRouteName: (context) {
+            return MainPageMaterial();
+          },
+          TrainInfoPromptCommon.routeName: (context) {
+            return TrainInfoPromptMaterial();
+          },
+          TrainInfo.routeName: (context) {
+            return TrainInfoMaterial(
+              trainNumber: ModalRoute.of(context).settings.arguments as int,
+            );
+          },
+        },
       );
     }
     else if (Platform.isIOS) {
@@ -30,7 +46,20 @@ class StartPoint extends StatelessWidget {
           primaryColor: Colors.blue.shade600,
           brightness: Brightness.dark,
         ),
-        home: MainPageCupertino(),
+//        home: MainPageCupertino(),
+        routes: {
+          Navigator.defaultRouteName: (context) {
+            return MainPageCupertino();
+          },
+          TrainInfoPromptCommon.routeName: (context) {
+            return TrainInfoPromptCupertino();
+          },
+          TrainInfo.routeName: (context) {
+            return TrainInfoCupertino(
+              trainNumber: ModalRoute.of(context).settings.arguments as int,
+            );
+          },
+        }
       );
     }
     return null;
@@ -39,25 +68,7 @@ class StartPoint extends StatelessWidget {
 
 mixin MainPageAction {
   onTrainInfoPageInvoke(BuildContext context) {
-    if (Platform.isAndroid) {
-      Navigator.of(context).push(
-        MaterialPageRoute(
-          builder: (context) {
-            return TrainInfoPromptMaterial();
-          }
-        )
-      );
-    }
-    else if (Platform.isIOS) {
-      Navigator.of(context).push(
-        CupertinoPageRoute(
-          builder: (context) {
-            return TrainInfoPromptCupertino();
-          },
-          title: "Informații despre tren"
-        )
-      );
-    }
+    Navigator.of(context).pushNamed(TrainInfoPromptCommon.routeName);
   }
 
   onStationBoardPageInvoke(BuildContext context) {

lib/train_info_page/train_info.dart

@@ -15,6 +15,8 @@ mixin TrainInfoMixin {
 }
 
 class TrainInfo extends StatelessWidget {
+  static String routeName = "/trainInfo/display";
+
   final int trainNumber;
 
   TrainInfo({@required this.trainNumber});

lib/train_info_page/train_info_prompt.dart

@@ -12,31 +12,11 @@ part 'train_info_prompt.g.dart';
 
 typedef TrainSelectedCallback(int trainNumber);
 
-mixin TrainInfoPromptAction {
+mixin TrainInfoPromptCommon {
+  static String routeName = "/trainInfo/chooseTrain";
+
   onTrainSelected(BuildContext context, int selection) {
-    if (Platform.isAndroid) {
-      Navigator.of(context).push(
-        MaterialPageRoute(
-          builder: (context) {
-            return TrainInfo(
-              trainNumber: selection,
-            );
-          },
-        )
-      );
-    }
-    else if (Platform.isIOS) {
-      Navigator.of(context).push(
-        CupertinoPageRoute(
-          title: "Informații despre trenul $selection",
-          builder: (context) {
-            return TrainInfo(
-              trainNumber: selection,
-            );
-          },
-        )
-      );
-    }
+    Navigator.of(context).pushNamed(TrainInfo.routeName, arguments: selection);
   }
 }
 
@@ -251,7 +231,7 @@ class TrainInfoPromptMaterial extends StatefulWidget {
   _TrainInfoPromptMaterialState createState() => _TrainInfoPromptMaterialState();
 }
 
-class _TrainInfoPromptMaterialState extends State<TrainInfoPromptMaterial> with TrainInfoPromptAction, TrainInfoPromptListHandling {
+class _TrainInfoPromptMaterialState extends State<TrainInfoPromptMaterial> with TrainInfoPromptCommon, TrainInfoPromptListHandling {
   TextEditingController trainNoController = TextEditingController();
   
   @override
@@ -311,7 +291,7 @@ class TrainInfoPromptCupertino extends StatefulWidget {
   _TrainInfoPromptCupertinoState createState() => _TrainInfoPromptCupertinoState();
 }
 
-class _TrainInfoPromptCupertinoState extends State<TrainInfoPromptCupertino> with TrainInfoPromptAction, TrainInfoPromptListHandling {
+class _TrainInfoPromptCupertinoState extends State<TrainInfoPromptCupertino> with TrainInfoPromptCommon, TrainInfoPromptListHandling {
   TextEditingController trainNoController = TextEditingController();
 
   @override