Check tiles are correctly ordered

android/gradle.properties

 org.gradle.jvmargs=-Xmx1536M
 android.useAndroidX=true
 android.enableJetifier=true
-app.versionName=0.0.10
-app.versionCode=10
+app.versionName=0.0.11
+app.versionCode=11

lib/entities/tile.dart

@@ -6,8 +6,8 @@ import '../provider/data.dart';
 class Tile {
   final Image image;
   final double size;
-  final int currentCol;
-  final int currentRow;
+  int currentCol;
+  int currentRow;
   final int originalCol;
   final int originalRow;
 
@@ -72,7 +72,6 @@ class Tile {
           );
         },
         onAccept: (List<int> data) {
-          print(data.toString());
           myProvider.swapTiles(
             [this.currentCol, this.currentRow],
             data

lib/provider/data.dart

@@ -58,6 +58,14 @@ class Data extends ChangeNotifier {
     _tiles[indexTile1] = _tiles[indexTile2];
     _tiles[indexTile2] = swap;
 
+    int swapCol = _tiles[indexTile1].currentCol;
+    _tiles[indexTile1].currentCol = _tiles[indexTile2].currentCol;
+    _tiles[indexTile2].currentCol = swapCol;
+
+    int swapRow = _tiles[indexTile1].currentRow;
+    _tiles[indexTile1].currentRow = _tiles[indexTile2].currentRow;
+    _tiles[indexTile2].currentRow = swapRow;
+
     notifyListeners();
   }
 

lib/screens/home.dart

 import 'dart:typed_data';
+import 'dart:math';
 
 import 'package:flutter/material.dart';
 import 'package:flutter/services.dart' show rootBundle;
@@ -143,6 +144,30 @@ class Home extends StatelessWidget {
     );
   }
 
+  List<Tile> shuffleTiles(List<Tile> tiles) {
+    var random = new Random();
+    int tilesCount = tiles.length;
+
+    for (int i = 0; i < 40; i++) {
+      int indexTile1 = random.nextInt(tilesCount);
+      int indexTile2 = random.nextInt(tilesCount);
+
+      Tile swap = tiles[indexTile1];
+      tiles[indexTile1] = tiles[indexTile2];
+      tiles[indexTile2] = swap;
+
+      int swapCol = tiles[indexTile1].currentCol;
+      tiles[indexTile1].currentCol = tiles[indexTile2].currentCol;
+      tiles[indexTile2].currentCol = swapCol;
+
+      int swapRow = tiles[indexTile1].currentRow;
+      tiles[indexTile1].currentRow = tiles[indexTile2].currentRow;
+      tiles[indexTile2].currentRow = swapRow;
+    }
+
+    return tiles;
+  }
+
   Future<List<Tile>> splitImageInTiles(Data myProvider) async {
     String imageAsset = getImageAssetName(myProvider.image);
     Uint8List imageData = (await rootBundle.load(imageAsset))
@@ -176,14 +201,27 @@ class Home extends StatelessWidget {
       y += height;
     }
 
-    tiles.shuffle();
+    return shuffleTiles(tiles);
+  }
 
-    return tiles;
+  bool _checkTilesetIsOrdered(List<Tile> tiles) {
+    for (Tile tile in tiles) {
+      if (
+        (tile.currentRow != tile.originalRow)
+        ||
+        (tile.currentCol != tile.originalCol)
+      ) {
+        return false;
+      }
+    }
+
+    return true;
   }
 
   Container _buildTilesetWidget(Data myProvider) {
     List tiles = myProvider.tiles;
 
+    Color borderColor = _checkTilesetIsOrdered(tiles) ? Colors.green : Colors.orange;
     int tileIndex = 0;
 
     Table tileset = Table(
@@ -204,14 +242,14 @@ class Home extends StatelessWidget {
     );
 
     return Container(
-      margin: EdgeInsets.all(4),
-      padding: EdgeInsets.all(4),
+      margin: EdgeInsets.all(8),
+      padding: EdgeInsets.all(8),
       decoration: BoxDecoration(
-        color: Colors.blue,
-        borderRadius: BorderRadius.circular(4),
+        color: borderColor,
+        borderRadius: BorderRadius.circular(8),
         border: Border.all(
-          color: Colors.green,
-          width: 4,
+          color: borderColor,
+          width: 8,
         ),
       ),
       child: tileset,
@@ -226,7 +264,7 @@ class Home extends StatelessWidget {
         color: Colors.blue,
         borderRadius: BorderRadius.circular(4),
         border: Border.all(
-          color: Colors.green,
+          color: Colors.blue,
           width: 4,
         ),
       ),